More than half of COVID-19 patients have post-disease syndrome: HKBU study

The School of Chinese Medicine at Hong Kong Baptist University (HKBU) found that 55% of the patients who sought medical treatment from the “HKBU Chinese Medicine Telemedicine Centre Against COVID-19” during the fifth wave of the COVID-19 pandemic continued to experience at least one long COVID symptom for six months to a year after diagnosed with an infection. The most common symptoms are fatigue, brain fog and cough.

The study also revealed that patients who took Chinese medicine after COVID-19 infection took a shorter time to test negative in rapid tests, and experienced significant symptom relief compared to patients who did not take Chinese medicine.

The research findings have been published in a number of papers in international academic journals including the Journal of Medical Virology and The American Journal of Chinese Medicine.

HKBU established the “HKBU Chinese Medicine Telemedicine Centre Against COVID-19” in 2021 during the fifth wave of the COVID-19 pandemic in Hong Kong to provide free telemedical services for COVID-19 patients. Making reference to the treatment protocols and clinical experiences in Mainland China, the expert team of HKBU’s School of Chinese Medicine formulated the “Chinese Medicine Clinical Guidelines for COVID-19 in Hong Kong” as the University’s clinical diagnosis and treatment standards for COVID-19. The Telemedicine Centre follows the guidelines to provide diagnosis, treatment, and prevention services to COVID-19 patients, close contacts, and caregivers.

Coughing is the most common early symptom of infection

The HKBU research team led by Professor Bian Zhaoxiang, Director of the Clinical Division at the School of Chinese Medicine, conducted a retrospective study using patient statistics collected by the Telemedicine Centre during the fifth wave of the pandemic. The team analysed the symptoms in the first four weeks of about 13,000 patients who were infected with COVID-19 from mid-March to early May in 2022 and underwent home isolation.

The results showed that 93% of patients experienced at least one symptom. The most common symptoms during the first week of infection were cough (91%), sputum (75%), dry throat (50%) and sore throat (44%). 17% of patients still had these symptoms four weeks after infection. Although the symptoms gradually subsided over time, the prevalence of fatigue increased.

Chinese medicine accelerates viral clearance

Among this batch of patients, the research team selected 311 patients who had taken Chinese medicine for five days within 10 days after diagnosis, and another 311 patients who had not taken any Chine medicine during the same period to evaluate the efficacy of Chinese medicine.

The results showed that patients who took Chinese medicine within 10 days after COVID-19 infection needed an average of seven days to test negative in rapid tests, and experienced an average of four symptoms, which were significantly milder compared to patients who didn’t take Chinese medicine. The average time to test negative for patients who did not take Chinese medicine was eight days, and they experienced an average of 11 symptoms. The results show that Chinese medicine is an effective treatment for COVID-19 infection.

Over half of the patients experience long COVID after six months

The research team conducted a follow-up telephone survey from November 2022 to January 2023 with 6,242 COVID-19 patients who sought medical consultation at the Telemedicine Centre between December 2021 and May 2022 to understand their symptoms and risk factors after six months to a year of infection.

The study found that 55% of patients still experienced at least one long-term symptom, i.e. “long COVID” or “post-COVID syndrome”. The most common symptoms were fatigue (36%), brain fog (34%) and cough (31%). Furthermore, females, middle-aged persons, obese people, those with comorbidities such as ophthalmology or otorhinolaryngology diseases, digestive system diseases, respiratory diseases, hyperlipidemia and cardiovascular diseases, and patients with more initial symptoms were more likely to develop long COVID. However, there was no significant correlation between taking three or more doses of vaccine and the occurrence of long COVID.

Professor Bian said: “HKBU established the Telemedicine Centre during the COVID-19 outbreak to provide free treatments for COVID-19 patients. We analysed the Centre’s data to deepen the medical community’s understanding of the symptoms during the early and middle stages of COVID-19 infection as well as the post-COVID syndrome. It allows the public to understand the effectiveness of Chinese medicine in treating COVID-19. The study also shows that the tele-services of Chinese medicine can be an important component of Hong Kong’s healthcare and disease prevention system.”

HKBU-led research discovers therapeutic potential of hyodeoxycholic acid for non-alcoholic fatty liver disease

A research led by Hong Kong Baptist University (HKBU) has discovered that hyodeoxycholic acid (HDCA), a bile acid generated in human intestine, can reduce fat accumulation and inflammation in the liver, demonstrating its strong therapeutic potential for non-alcoholic fatty liver disease (NAFLD). The research also found that HDCA’s intervention in NAFLD works by reshaping the population of beneficial gut bacteria, which affects the metabolic interactions between the gut and the liver. The result highlighted the critical role of gut health in liver disease.

The research findings have been published in the renowned scientific journal Cell Metabolism. HKBU researchers will coordinate a phase I and II clinical trial in the Mainland to evaluate the safety and efficacy of HDCA for patients with fatty liver disease and type 2 diabetes.

32% of adults suffer from NAFLD

NAFLD is a leading cause of chronic liver disease, characterised by the build-up of excessive fat in liver cells that is not caused by alcohol consumption. Its global prevalence has been increasing over time. A meta-analysis in 2022 estimated that 32% of the adult population is affected by NAFLD. Some people with NAFLD can develop non-alcoholic steatohepatitis, which is marked by liver inflammation and may progress to cirrhosis and liver failure. Currently, there are no therapeutic drugs available for sale on the market for non-alcoholic steatohepatitis.

A research led by Professor Jia Wei, Acting Dean and Chair Professor in Chinese Medicine and Systems Biology of the School of Chinese Medicine at HKBU, discovered that HDCA offers promising potential as a pharmaceutical intervention for NAFLD. “Our research is a significant stride forward in understanding the pathophysiology of NAFLD, and it offers a potential new avenue for therapeutic intervention,” he said.

Therapeutic effects of HDCA

Professor Jia’s team found that individuals with NAFLD have lower levels of HDCA compared to those without NAFLD. In a cohort consisting of 178 patients with NAFLD and 73 healthy individuals, hyocholic acid species, including HDCA and its major metabolite glycohyodeoxycholic acid, comprises 0.5% of the bile acids in NAFLD patients, which is significantly lower than the 2% in healthy individuals. This observation led the team to explore HDCA’s potential therapeutic role.

A series of controlled experiments were conducted to evaluate the therapeutic effect of HDCA. The team orally fed HDCA to mouse models with NAFLD for eight weeks. The results showed that HDCA markedly reduced excessive lipid droplets, and improved hepatic inflammation, oral glucose tolerance (i.e. the blood glucose level after oral intake of glucose), and insulin sensitivity (i.e. the sensitivity of the body to the effects of insulin which helps the glucose to enter into the cells for use) compared to the control group. The results revealed that HDCA alleviated NAFLD conditions and the risk factors of NAFLD such as type 2 diabetes and insulin resistance.

Interestingly, the researchers found that HDCA did not exert its therapeutic effects on NAFLD by directly targeting liver cells. They evaluated the potential direct effect of HDCA on lipid accumulation in a mouse model. The results showed that lipid accumulation was barely affected by the HDCA. They hypothesised that HDCA induced gut microbiota alterations, which might contribute to the alleviation of NAFLD.

HDCA reshapes gut microbiota

The researchers observed that HDCA could improve the population of beneficial gut bacteria. Parabacteroides distasonis (P. distasonis), a member of the core microbiome in the human gut, sharply increased in the mouse model fed with high-fat food and administered with HDCA, compared with the control group fed with high-fat food only. The results revealed that HDCA provided a favorable environment for the thriving of P. distasonis, which regulates fatty acid metabolism as well as the hepatic bile acid synthesis pathways.

“The study underscores the crucial role of the gut-liver metabolic axis in disease management. We hope that the research findings on HDCA and the clinical trial to be conducted in the Mainland will provide more insights into the treatment of fatty liver disease and non-alcoholic steatohepatitis,” said Professor Jia.

Professor Jia has also led a research project investigating the molecular connections between metabolic-associated fatty liver disease and type 2 diabetes mellitus, with a specific focus on host-gut microbiota interactions. The project has been awarded over HK$7.2 million in research funding from the Theme-based Research Scheme (13th round) under the Research Grants Council.

Two HKBU distinguished scientists elected members of Academia Europaea

Two distinguished scientists at Hong Kong Baptist University (HKBU), Professor Jia Wei, Cheung On Tak Endowed Professor in Chinese Medicine and Associate Dean (International Collaboration) of the School of Chinese Medicine, and Professor Cai Zongwei, Kwok Yat Wai Endowed Chair in Environmental and Biological Analysis and Director of the State Key Laboratory of Environmental and Biological Analysis, have been elected as a Member and a Foreign Member of the Academia Europaea respectively this year.

This prestigious recognition underscores Professor Jia’s exceptional contributions to the field of metabolism and physiology, and Professor Cai’s remarkable achievements in environmental and analytical chemistry.

Established in 1988, the Academia Europaea is the pan-European Academy of Sciences, Humanities and Letters. It is committed to advancing and disseminating excellence in scholarship across a wide range of disciplines, including the humanities, law, economic, social, and political sciences, mathematics, medicine, and all branches of the natural and technological sciences. It comprises around 5,000 distinguished scientists and scholars, including 83 Nobel Prize laureates.

Professor Jia is a renowned scientist in metabolomics and has a distinguished career in the pharmaceutical and medical field. Since joining HKBU in 2019, Professor Jia’s research has primarily focused on the identification of biomarkers in various metabolic diseases and investigating the mechanisms of key metabolic pathways involved in disease pathogenesis.

Currently, Professor Jia serves as the Director of the Hong Kong Traditional Chinese Medicine Phenome Research Centre, the first phenome centre focusing on Chinese medicine in both local and global contexts. Under his leadership, the Centre has attracted top global talents to conduct high-quality molecular and population-level translational research.

Professor Jia’s exceptional impact is demonstrated by a Google Scholar citation count of over 35,000 and a Google H-Index of 88. He was selected as one of the Most Cited Chinese Researchers in 2020, 2021, and 2022 by ELSEVIER, a leading global academic publisher. He has published 10 books, secured over 20 patents, and produced more than 500 papers in high-impact academic journals. Many of the papers published during his tenure at HKBU’s School of Chinese Medicine have ranked among the top 1% of most-cited journals in the field of biomedical sciences.

Professor Cai is a distinguished chemist in the field of environmental and analytical chemistry and an internationally acclaimed expert in environmental toxicology and human health research.

Professor Cai established and directed the Dioxin Analysis Laboratory since 2003 and the State Key Laboratory of Environmental and Biological Analysis since 2013, which have significant impact on environmental sciences and human health research in Hong Kong, the Great Bay Area and Mainland China. He was invited as the principal author for the Asia-Pacific regional reports on persistent organic pollutants under the Stockholm Convention by the United Nation Environmental Program.

Professor Cai has an outstanding research record with more than 700 scientific publications, 21,000 citations and a Scopus H-index of 73. He has been consecutively listed as the world’s most highly cited researcher in Stanford University’s list of World’s Top 2% Scientists in Analytical and Environmental Sciences. He is a Fellow of the Royal Society of Chemistry, and won the 2011 Second-Class State Natural Science Award for a collaborative research project. In 2018, he won the Higher Education Outstanding Scientific Research Output Award (Science and Technology) in Natural Sciences by the National Ministry of Education and the Award for Outstanding Contribution to Eliminate Persistent Organic Pollutants by the Chinese Society for Environmental Sciences. He also received the Distinguished Young Scholar Award in 2003 by the National Natural Science Foundation of China and was appointed as “Changjiang Scholar – Chair Professor” by the National Ministry of Education in 2013.

HKBU-led team discovers new box jellyfish species in Mai Po Hong Kong

A Hong Kong Baptist University (HKBU)-led team has discovered a new species of box jellyfish in the Mai Po Nature Reserve in Hong Kong. The new jellyfish species, which belongs to the family Tripedaliidae, was named Tripedalia maipoensis by the research team. It is the first discovery of a new box jellyfish species from the waters of China. The discovery also adds a fourth species to the Tripedaliidae family.

A paper describing the new species has been published in the international academic journal Zoological Studies.

Box jellyfish named after Mai Po

The research team was led by Professor Qiu Jianwen, a Professor of the Department of Biology
at HKBU. With collaborators from WWF-Hong Kong, Ocean Park Hong Kong and the University of Manchester, the team collected the jellyfish samples from a brackish shrimp pond, locally
called “gei wai”, in the Mai Po Nature Reserve during the summers of 2020 to 2022, and they found that the samples contained a new species.

Professor Qiu said: “We named the new species Tripedalia maipoensis to reflect its type locality – where the new species was first found. Although it is currently known only in Mai Po, we believe that this species is also distributed in the adjacent waters of the Pearl River Estuary as the gei wais are connected to the estuary through a tidal channel.”

Fourth species of the family Tripedaliidae  

Named for its cube-shaped body, the box jellyfish, (or scientifically known as class Cubozoa) belong to the phylum Cnidaria. Even though the class Cubozoa is one of the smaller groups among the cnidarians, it includes some of the highly venomous marine animals that are widely known in the tropical waters.

The newly discovered Tripedalia maipoensis belongs to the family Tripedaliidae. It is the fourth described species of Tripedaliidae, and the third described species of the genus Tripedalia around the world. It has a transparent and colourless body with an average length of 1.5 cm. There
are three tentacles that are up to 10 cm long at each of its four corners. Pedalia, a flat pedal-shaped structure at the base of each tentacle that looks like a boat paddle, allows box jellyfish to produce strong thrusts when they contract their bodies. They can thus swim faster than other kinds of jellyfish.

The box jellyfish with 24 eyes

Like other box jellyfish, Tripedalia maipoensis has 24 eyes. The 24 eyes are equally divided into four groups, and each group of six eyes is located inside a sensory depression called a rhopalium on each side of the bell. In each group of eyes, the researchers believe that two of them have lenses that enable image-forming, while the other four can only sense light.

Box jellyfish are also characterised by having a velarium, a membranous and muscular sheet that constricts the opening of the bell. There are canals in the velarium which run along the bell margins and allow water to enter the bell. In the new species, the velarial canals are biforked into multi-branches, which distinguishes them from other species of the same genus.

First discovery of new box jellyfish species in Chinese waters

The research team compared samples of Tripedalia maipoensis with those of other closely related species using morphological and molecular methods.

It was discovered that the new species exhibits greater diversity compared to Tripedalia cystophora – its closely related species that have been widely reported in the tropics and subtropics including Jamaica, Florida, Singapore, Australia, and India.

Professor Qiu said: “Box jellyfish are a small group of cnidarians with only 49 species reported worldwide. They are poorly known in Chinese marine waters. Our discovery of Tripedalia maipoensis in Mai Po – a relatively well-studied area in Hong Kong – highlights the rich diversity of marine life in Hong Kong and even the whole of China.”

Please click here for photos of the jellyfish and a video on its discovery.

HKBU-led research discovers new therapeutic target for irritable bowel syndrome

A research study led by scientists from the School of Chinese Medicine (SCM) at Hong Kong Baptist University (HKBU) has shown for the first time that the human gut bacterium Ruminococcus gnavus is a major trigger factor of diarrhoea-predominant irritable bowel syndrome (IBS-D). Based on this discovery, a new therapeutic target for the disease’s treatment was identified. The study also found that low-protein food items such as fresh fruits, vegetables and bread may help reduce the gut motility in IBS-D. The research findings have been published in the internationally renowned scientific journal Cell Host & Microbe.

Curative treatment for IBS-D needed

Irritable bowel syndrome (IBS) is a common functional bowel disorder characterised by stool irregularities, abdominal discomfort and bloating. It has been estimated that about 7% of adults in Hong Kong are affected by IBS. IBS-D is the most common type of IBS and there is no known cure for the disease. Most clinical treatments for IBS-D focus on relieving symptoms.

Previous research has demonstrated that the increased production of serotonin, a key neurotransmitter involved in the regulation of gut motility, contributes to the gastrointestinal symptoms displayed in IBS-D. It has also been shown that gut microbiota play a role in regulating the levels of serotonin. However, the bacterial species concerned and the molecular mechanism by which the gut microbiota modulate serotonin production remain unclear.

Phenethylamine and tryptamine produced by Ruminococcus gnavus trigger IBS-D

To explore curative treatment options for IBS-D, a research team co-led by Professor Bian Zhaoxiang, Director of the Clinical Division and Tsang Shiu Tim Endowed Professor in Chinese Medicine Clinical Studies; Dr Xavier Wong Hoi-leong, Assistant Professor of the Teaching and Research Division; and Dr Zhai Lixiang, Post-Doctoral Research Fellow of SCM at HKBU, screened
thousands of food components and their breakdown products in the fecal samples of 290 patients with IBS-D. They found that phenethylamine and tryptamine, two aromatic trace amines produced by the microbial digestion of dietary proteins, are highly enriched in IBS-D faeces, and they are associated with the severity of diarrheal symptoms in patients with IBS-D.

Probing further, the researchers found that mice which had been fed with either phenethylamine or tryptamine experienced increased stool frequencies and colonic secretions, which are major symptoms of IBS-D.

On the other hand, the team found that the gut bacterium Ruminococcus gnavus, which is enriched in IBS-D faecal samples, is a primary producer of phenethylamine and tryptamine. Furthermore, mice with this bacterium transplanted into their guts go on to develop IBS-D diarrheal symptoms. These results suggest that phenethylamine and tryptamine produced by Ruminococcus gnavus trigger IBS-D in mammals without the involvement of other risk factors of IBS-D.

Phenethylamine and tryptamine stimulate serotonin production

The research team further conducted a series of experiments to understand the mechanism by which phenethylamine and tryptamine lead to IBS-D. The results showed that phenethylamine and tryptamine directly stimulate the production of serotonin from the enterochromaffin cells in the gut through the activation of a trace amine-associated receptor (TAAR1), thereby stimulating gut motility and secretion disorders in IBS-D.

The team then explored the therapeutic potential of targeting the phenethylamine/tryptamine/TAAR1 pathway for the treatment of IBS-D. It was discovered that inhibition of TAAR1 activation through the use of a specific inhibitor effectively alleviated the diarrheal symptoms in mice which had been transplanted with IBS-D faecal samples.

Prospects for new therapeutic options

“With a full outline of the mechanism of how gut microbiota associate with gut motility disorders, our research results suggest that the phenethylamine/tryptamine-mediated TAAR1 pathway
is a new therapeutic target for IBS-D,” said Dr Zhai Lixiang.

“IBS-D patients experience frequent episodes of diarrhea with accompanying abdominal pain, which reduce the quality of life. The research discoveries offer promising potential for the development of therapies for IBS-D based on the inhibition of the pathway,” said Professor Bian Zhaoxiang.

The research team also found that a diet low in phenylalanine, an amino acid and a dietary precursor of phenethylamine, suppresses gut motility in mice by reducing the microbial production of phenethylamine and tryptamine. Low-protein food items such as fresh fruits, vegetables and bread have relatively low levels of phenylalanine.

“Developing strategies to reduce the microbial transformation of dietary amino acids into phenethylamine and tryptamine, such as dietary intervention with reduced consumption of high-protein food items which usually have high phenylalanine levels, may represent a feasible approach for the management of IBS-D,” said Dr Xavier Wong.

HKBU-led research unveils cell entry mechanism of SARS-CoV-2

A study led by scientists from Hong Kong Baptist University (HKBU) has identified a protease called MT1-MMP that is a major host factor behind the infectivity of the SARS-CoV-2 virus in the human body, which leads to the infection of COVID-19 and multi-organ failure. By applying a humanised antibody called 3A2 that can inhibit the activity of MT1-MMP, the viral load of infected mice was reduced by almost 90%. The research team also demonstrated that the protease is a potential therapeutic target for COVID-19.

The research findings have been published in the internationally renowned scientific journal Nature Communications.

ACE2 as a receptor for SARS-CoV-2 cell entry 

Vaccination can protect people against COVID-19 and its potential complications, but it is not always effective in individuals with weak immune systems, or against some COVID-19 variants of concern. Thus, the development of a more effective treatment for COVID-19 remains a huge challenge in the post-vaccine era. Understanding the cell entry mechanism of SARS-CoV-2 is vital to curb the spread of the virus, and it will also aid the search for new COVID-19 treatments.

SARS-CoV-2 requires angiotensin-converting enzyme 2 (ACE2), a protein found on the membrane of human cells, as its receptor for cellular entry. Despite the lungs being the major organ affected by SARS-CoV-2 infection, only a small proportion of lung cells express ACE2.

Previous studies found that the infection of organs with low levels of ACE2 expression by SARS-CoV-2 is made possible by a soluble form of ACE2. The soluble ACE2 binds with SARS-CoV-2, carries the virus to cells with low levels of ACE2 expression, and facilitates its entry into the cells.

MT1-MMP mediates cell entry of SARS-CoV-2 

A research team led by Dr Xavier Wong Hoi-leong, Assistant Professor of the Teaching and Research Division of the School of Chinese Medicine at HKBU, in collaboration with Dr Yuan Shuofeng, Assistant Professor of the Department of Microbiology at The University of Hong Kong, further studied how the physiological regulation of soluble ACE2 shedding contributes to the aetiology of COVID-19.

The team found that SARS-CoV-2 infection leads to the increased activation of MT1-MMP, a protease crucial for many physiological processes. MT1-MMP mediates the release of soluble ACE2 from ACE2-expressing cells. This soluble ACE2 in turn binds to the spike proteins of SARS-CoV-2 and carries it to the uninfected cells with low levels of ACE2 expression.

Notably, the team demonstrated that the introduction of human-soluble ACE2 enables SARS-CoV-2 to infect the lungs of a laboratory mouse strain (C57BL/6 mice) that is naturally insusceptible to SARS-CoV-2 infection due to the incompatibility of its mouse ACE2 and the viral spike proteins. The findings unveil the mechanism by which the virus hijacks host enzymes to enhance its infectivity, triggering multi-organ infections.

Antibody 3A2 blocks MT1-MMP activity 

To study MT1-MMP’s functions and how it affects viral infection, the researchers used human cells to create organoids, a 3D tissue structure grown in vitro to resemble and model different organs in the laboratory.

They discovered that blocking MT1-MMP activity with the monoclonal antibody 3A2 effectively depleted soluble ACE2 levels and reduced the degree of infection of SARS-CoV-2 in human lung, heart and liver organoids by 60-80%. Consistent results were obtained using the original strain of SARS-CoV-2, as well as variants of concern, such as Delta and Omicron. The

results demonstrate that MT1-MMP is a major host factor that mediates the cell entry of SARS-CoV-2, and that it is also a potential therapeutic target for COVID-19 drugs.

The researchers further tested the effects of applying 3A2 in a mouse COVID-19 model. A group of 11 mice were treated with either 3A2 or vehicle controls. Older mice were used in the experiment as old age is a major risk factor for severe symptoms and mortality for COVID-19. The results show that 3A2 reduced the viral load of SARS-CoV-2 by almost 90% and dramatically alleviated lung tissue damage resulting from infection.

MT1-MMP as a therapeutic target 

Dr Wong said: “Two major challenges when it comes to developing COVID-19 drugs are how to enhance treatment results for patients with weakened immune systems, and how to maintain the drugs’ effectiveness across different viral strains. 3A2 has good potential to become an effective drug for curing COVID-19 because it antagonises the activity of MT1-MMP, instead of boosting the immunity of patients or acting directly on the virus.

“Our previous studies have demonstrated that 3A2 also offers protection against obesity and diabetes, two major risk factors for severe symptoms and mortality for COVID-19. Therefore, 3A2 could be particularly suitable for high-risk groups, including older adults and people with metabolic disorders. It could also be effective against emerging coronaviruses in the future, because ACE2 is a doorway for many such viruses with similar cell entry mechanisms. Further research and experiments on 3A2 are required before it can be applied in humans.”

HKBU launched novel art-tech project to transform the future of cinema

The cinema, just like filmmaking technology, is always evolving. An array of rapidly developing technologies, ranging from the virtual reality and augmented reality to artificial intelligence, offer tremendous potential for the future of cinematic experience. Hong Kong Baptist University (HKBU) is leading a visionary research project that will create technological breakthroughs and unprecedented cinematic experiences, taking people’s appreciation of the arts to a new level. 

The novel art-tech project entitled “Future Cinema Systems: Next-Generation Art Technologies” is being led by HKBU in collaboration with City University of Hong Kong and École Polytechnique Fédérale de Lausanne in Switzerland. It is a pioneering attempt to develop and construct a “Future Cinema System” (FCS), an integrated system for artists and the creative industries to meet the growing demand for new interactive immersive forms of cultural experience, as well as entertainment and education.  

Powered by advanced technologies, including artificial intelligence, computer vision, deep learning and virtual reality, the FCS comprises three-dimensional interactive immersive visualisation environments that integrate all forms of real-time and pre-recorded content with a broad range of wearable sensors and biometric devices. 

The project leader, Professor Jeffrey Shaw, Chair Professor of the Academy of Visual Arts at HKBU, says: “This vanguard project opens the door to boundless applications in the arts and creative industries. The FCS will create profound virtual experiences for tangible and intangible cultural heritage; innovate performative platforms for theatre, dance, music and sports; and transform the world’s multimedia archives into explorable post-cinematic encounters.” 

As the FCS harnesses three integrated technological breakthroughs in the fields of visualisation, human-computer interaction and co-evolutionary narrative with the involvement of HKBU’s artificial intelligence expert Professor Liu Jiming and his team, Professor Shaw can explore the future experience of archive, place and performance.  

Novel immersive experience can now be enjoyed at the Visualisation Research Centre, one of the key deliverables of the project. Home to the world’s first 360-degree immersive LED Visualisation Cinema and the 180-degree iDome Cinema, this newly established facility will provide innovative platforms for theatre, dance, music and sports, and transform multimedia archives into post-cinematic encounters that people can explore and experience. 

With the new facilities in place on campus, Professor Shaw and his team are working to produce scaleable outcomes that can be experienced by the general public. The deliverables of the Future Cinema Systems project will first be deployed at selected facilities in Hong Kong, such as the Hong Kong International Airport, M+ Museum and Tai Kwun. 

“We are about to experience something truly transformative, as the Future Cinema Systems project opens the door to boundless new horizons in the arts and creative industries,” says Professor Shaw. 

Professor Jeffrey Shaw and his team are taking people’s appreciation of the arts to a new level through the novel art-tech project “Future Cinema Systems: Next-Generation Art Technologies”. 

HKBU develops new aptamer drug for bone anabolic therapies

A research team led by Hong Kong Baptist University (HKBU) has identified a molecular target for bone anabolic therapies using a selected aptamer that serves as an inhibitor of sclerostin, a protein that prevents bone growth. The discovery offers hope for the development of an effective next-generation treatment for osteoporosis and osteogenesis imperfecta that is free of cardiovascular risk compared to the marketed antibody drug.

The research findings have been published in the international academic journals Nature Communications and Theranostics. The new drug is at the pre-clinical trial development stage, and the research team plans to start clinical trials in the US and on the Mainland in 2024.

Current medication increases cardiovascular risk

Osteoporosis is a metabolic condition which leads to a reduction in bone density, resulting in weakened bones that are more fragile and likely to break. Osteogenesis imperfecta, also known as “brittle bone disease”, is a rare congenital genetic disorder characterised by extremely fragile bones. Sclerostin has been identified as a therapeutic target for both diseases.

In 2019, the US Food and Drug Administration (FDA) approved the use of the monoclonal antibody against sclerostin for the treatment of postmenopausal osteoporosis. Studies have also shown that sclerostin antibody enhances bone mass and bone strength of mice with osteogenesis imperfecta. However, as sclerostin plays a protective role in the cardiovascular system, it was seen that sclerostin antibody increased the risk of heart attacks, stroke and cardiovascular death during clinical trials. Therefore, a black box warning for potential cardiovascular risks is required by FDA.

A research team led by Professor Lyu Aiping, Dr. Kennedy Y.H. Wong Endowed Professor in Chinese Medicine and Director of the Institute of Integrated Bioinformedicine and Translational Science at HKBU; Professor Zhang Ge, Director of the Law Sau Fai Institute for Advancing Translational Medicine in Bone and Joint Diseases at HKBU; and Dr Yu Yuanyuan, Manager of the Guangdong-Hong Kong-Macau Greater Bay Area International Research Platform for Aptamer-based Translational Medicine and Drug Discovery and Assistant Professor of the School of Chinese Medicine at HKBU, endeavoured to develop alternative drug options.

“loop3” identified as a new therapeutic target

Sclerostin suppresses bone formation by antagonising the “Wnt signalling pathway”. The “Wnt signalling pathway” modulates the stem cells responsible for skeletal tissue regeneration. Therefore, inhibition of sclerostin promotes bone growth.

The research team discovered that a “loop3 domain” in the core region of sclerostin can be used as a molecular target to inhibit sclerostin. Through genetic studies, it was shown that deficiency of the loop3 domain can inhibit sclerostin’s antagonistic effect against the Wnt signalling pathway, but it does not affect the cardiovascular protective effect of sclerostin. The result suggests that the loop3 domain can serve as a molecular target for inhibiting sclerostin while preserving its cardiovascular protective function.

The researchers then proceeded to screen aptamers that can specifically inhibit sclerostin loop3. Aptamers are single-stranded DNA or RNA molecules that can selectively bind to molecular targets such as proteins. After binding with specific proteins, aptamers may inhibit protein–protein interactions and thereby elicit certain therapeutic effects. Through a combinatorial technology, an aptamer “aptscl56” was selected as a potential sclerostin inhibitor that targets the loop3 structure.

Aptamer selected as effective and safe sclerostin inhibitor

The research team examined aptscl56’s therapeutic functions with osteoporotic rat models and osteogenesis imperfecta mouse models. They found that aptscl56 effectively promots bone formation. On the other hand, the application of aptscl56 does not increase the risk of developing cardiovascular diseases such as aortic aneurysms and atherosclerotic development in both models.

The medical use of aptamers confers certain advantages, such as thermal stability and ease of synthesis. However, they are prone to rapid degradation and renal filtration. The research team therefore modified aptscl56 to produce an aptamer named “Apc001” with a longer half-life. The team demonstrated that Apc001 promotes bone formation, increases bone mass, improves bone microarchitecture integrity, and enhances bone mechanical properties in rats with osteoporosis and mice with osteogenesis imperfecta.

Clinical trials due to start in 2024

“Searching for reliable and safe alternatives to overcome the limitations of the currently available drugs is crucial to help patients who need bone anabolic therapies. Our ongoing studies, which span from identifying molecular targets for sclerostin inhibition to aptamer drug discovery, offer hope for the development of next-generation sclerostin inhibitors in the near future,” said Professor Zhang Ge.

“Our search for alternative drugs for bone anabolic therapies is a good example of tripartite collaboration between academia, industry and the government. The research work was partly conducted in collaboration with a local biotechnology company, and it was supported by the Innovation and Technology Fund. Some biotechnology companies in the Mainland were engaged in certain aspects of developmental research for the aptamer, such as toxicology tests. The collaborative efforts will continue to create more synergy and fruitful results,” said Professor Lyu Aiping.

The therapeutic aptamer Apc001 was granted orphan drug designation by the FDA for the treatment of osteogenesis imperfecta in 2019.

HKBU-led research facilitates more efficient hybrid rice breeding with pioneering female sterility technique

Research led by Hong Kong Baptist University (HKBU) involving the use of a pioneering female sterility technique has led to a breakthrough in the production of hybrid rice seeds. Compared to the commonly used “three-line” male sterility technique in hybrid rice seeds production, the novel approach enhances the efficiency of hybrid rice production by eliminating rice seeds that have been produced due to the self-pollination of the “restorer line”. The novel technique enables fully automatic harvesting of hybrid seeds by machines, which can substantially reduce harvesting costs. The research results have recently been published in Cell Research, a top-ranking international scientific journal.

Male sterility technique incurs high harvesting costs

Self-pollinating plants are known to maintain their genome homozygosity, and as a result, their offspring can have the same features over generations.

Heterosis, which refers to the increased rate of growth due to genome heterozygosity as a result of the hybridisation of distant parents, is difficult to exploit with self-pollinating plants. In nature, rice is usually bred using self-pollination. However, over the past few decades, scientists – following pioneering work by Professor Yuan Longping, the “Father of Hybrid Rice” – have developed hybrid rice breeding techniques by exploiting sterile male genes, and these techniques can produce hybrid seeds with the normally self-pollinating rice plants in large quantities. China and other countries around the world have extensively used the male sterility technique to produce hybrid rice seeds, and it has led to a substantial increase in rice yields.

The male sterility technique first breeds cultivars, i.e. plant varieties, of the “male-sterile line” of rice as pollen receivers. Rice cultivars from the “restorer line” with normal fertility act as pollen donors, and they are grown close to the “male-sterile line” to facilitate pollen transfer for hybridisation. However, self-pollinating seeds can also be produced by the “restorer line”, and they must be removed manually to avoid mixing them up with the hybrid seeds before mechanical harvest, resulting in high harvesting costs. In theory, using sterile female rice as the “restorer line” is ideal because it cannot produce any self-pollinated seeds. However, this approach has not been adopted because the germplasm of sterile female rice remains extremely rare in nature and sterile female plants find it difficult to self-reproduce.

TFS1 mutation exhibits female sterility

After nearly a decade of ongoing study, a research team led by Professor Zhang Jianhua, Chair Professor of the Department of Biology at HKBU, has managed to identify a “spontaneous thermo-sensitive female sterility 1” (TFS1) gene mutation in an elite rice cultivar during paddy field production. This genetic mutation exhibits female sterility under regular or high temperature conditions (i.e. above 25°C), and fertility is partly resumed under low temperature conditions (i.e. 23°C). It does not have any defects in terms of its vegetative growth.

The team observed that rice with the TFS1 gene mutation can produce healthy pollen with normal male fertility. Rice with normal fertility can produce normal seeds after receiving pollen from rice with the TFS1 gene mutation. Further investigations revealed that under regular or high temperature conditions, after pollen has landed on the stigma of rice with the TFS1 gene mutation, pollen tubes that have grown from the pollen cannot enter the embryo sac. The embryos therefore fail to develop and seeds cannot be produced. But under low temperature conditions, the ability to fertilise and develop embryos is partially recovered.

Following genetic analysis using gene cloning and molecular techniques, the team found that the female sterility mutation is created by a point mutation in the genic region of Argonaute7 (AGO7), a member of the Argonaute (AGO) protein complex that is responsible for the production of many small interfering RNAs, namely tasiR-ARFs. The downstream regulation of these tasiR-ARFs regulates the pollen tube entrance into the embryo sac, but it failed under regular or high temperature conditions in the rice with TFS1 mutation, and hence double fertilisations cannot be achieved.

No need to remove “restorer lines” before harvest

To evaluate the potential of using TFS1 as a genetic tool for hybrid rice production, the team conducted field trials in Hong Kong and Hunan Province in mainland China. The TFS1 gene mutation was introduced into three cultivars of rice by introgression and genome editing to create the germplasms with thermo-sensitive female sterility. They acted as the “restorer lines” for pollen donation. Another three cultivars of rice with male sterility were used as the “male-sterile lines”.

The team planted the “restorer lines” separately next to the “male-sterile lines” as in traditional hybrid breeding, or randomly mixed them on the farm when planting. In both planting arrangements, more than 30% of the panicles of the “male-sterile lines” in Hong Kong, and 40% in Hunan Province produced hybrid seeds. The proportion of seed sets is similar to the hybrid production yields using existing “restorer lines”, but the hybrid rice seeds can be harvested without the removal of the “restorer lines”.

Great commercial potential with reduced harvesting costs

Professor Zhang said: “Nowadays, producing hybrid rice seeds is still a labour-intensive process in agriculture. Female sterility, if it can be introduced into a ‘restorer line’ as a pure pollen donor, has great potential to reduce the cost, because the male and female parents of hybrid rice can be grown and harvested together by machines without worrying about seed purity.

“Our research findings provide a suitable trait for fully mechanised hybrid rice breeding, and our genetic tool has shown great promise for commercial applications. To maximise rice yields, we need further large-scale field trials to improve the receptibility between female and male-sterile lines.”

Apart from researchers from HKBU, the research team included scientists from the Hunan Agricultural University, the Guangdong Academy of Agricultural Sciences, the University of California at Davis, and the National Agriculture and Food Research Organisation in Japan.

HKBU Global University Film Awards 2022 presents gold award to France’s Le Fresnoy

Organised by the Academy of Film (AF) at Hong Kong Baptist University (HKBU), the Global University Film Awards (GUFA) 2022 held its magnificent award presentation ceremony in virtual mode on 11 November. The entry from France’s Le Fresnoy clinched the Gold Award. (The full list of winners is attached in the appendix at the end of this article).

This year’s award presentation ceremony was broadcast live online in a wonderfully designed cinematic setting, using virtual sets and advanced technology to recreate classic scenes in blockbusters such as The Matrix, the Harry Potter film series, and In the Mood for Love. In his opening remarks at the ceremony, Dr Clement Chen, Chairman of the Council and the Court of HKBU, shared the delights of seeing GUFA held for the third time. “We hope to stand as a beacon of encouragement to emerging filmmakers, allowing them to create their art without commercial considerations and industry pressures. At university, they are free to let their imagination fly, share their concerns and explore creative ideas. We at HKBU embrace these ideals and, for over four decades, have been offering the finest teaching and training in the cinematic arts. We continue to celebrate this legacy today as we nurture tomorrow’s filmmakers.”

In his speech, Professor Alexander Wai, President and Vice-Chancellor of HKBU, said: “HKBU is the first institution in Hong Kong to offer film and video production programmes and we always have our eyes on the future. Filmmaking is a global community, and GUFA is a way for all of us to celebrate new young talents from all over the world. It gives me great delight to have a sneak peek at the future voices of filmmaking and to celebrate their progress.”

Widely known as the “University Oscars”, this year GUFA received more than 2,300 submissions from about 100 countries and regions. Celebrated professionals in the film industry, including directors Ms Mabel Cheung, Mr Derek Tsang, Ms Jessey Tsang, Mr Ray Yeung, and actress/producer Ms Josie Ho presented 15 awards to young film talents from all over the world, letting them shine on a glamorous virtual stage.

To further showcase the exemplary works at GUFA 2022, a public screening of the winners was held on 15 November at HKBU. Members of the public were welcome to attend. For more information, please refer to the GUFA website, GUFA Facebook page and GUFA YouTube channel.

GUFA recognises the excellence of film productions by university students from across the world by connecting the global film community and its audiences with outstanding work and groundbreaking ideas presented by the participants. The event not only showcases the students’ talents but also fosters the exchange of ideas and enhances professional networks, building synergy between young regional talents and the international creative industry.

Appendix: Award winners

Award

Winning film

University

Best Narrative

Good German Work

Konrad Wolf Film University of Babelsberg, Germany

Special Mention of Narrative

When Summer Ends

Hong Kong Baptist University, Hong Kong

Best Cine-VFX

Little Gestures

Pearson College London, United Kingdom

Special Mention of Cine-VFX

17 Souls

University of Television and Film Munich (HFF München), Germany

Best Documentary

Pupus

Centro Sperimentale di Cinematografia- Sede Sicilia, Italy

Special Mention of Documentary

Broken

Yangon Film School, Myanmar

Best Experimental Film

$75 000

Le Fresnoy, France

Special Mention of Experimental Film

In Plain Sight

Chulalongkorn University, Thailand

Best Animation

Graziano and the Giraffe

Centro Sperimentale di Cinematografia, Italy

Special Mention of Animation

A Dog under Bridge

China Academy of Art, Mainland China

Best Director

To Each Your Sarah

Korea National University of Arts, South Korea

Best Script

Russian Vodka

University of Applied Science and Technology, Iran

Gold Award

$75 000

Le Fresnoy, France

HKBU Academy of Film’s Choice

Intimate Distance

Hong Kong Baptist University, Hong Kong

HKBU Academy of Film’s Choice Special Mention

Love Delivery

Hong Kong Metropolitan University, Hong Kong