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https://www.med.cuhk.edu.hk/press-releases/a-randomised-placebo-controlled-clinical-trial-by-cu-medicine-shows-that-modulation-of-gut-microbiome-using-oral-microencapsulated-live-bacteria-sim01-improves-long-covid-symptoms
https://www.med.cuhk.edu.hk/press-releases/a-randomised-placebo-controlled-clinical-trial-by-cu-medicine-shows-that-modulation-of-gut-microbiome-using-oral-microencapsulated-live-bacteria-sim01-improves-long-covid-symptoms

A randomised placebo-controlled clinical trial by CU Medicine shows that modulation of gut microbiome using oral microencapsulated live bacteria (SIM01) improves long COVID symptoms

70% of patients in Hong Kong who have recovered from COVID-19 continue to suffer from at least one long COVID symptom at around 6 months. There is however no proven treatment for long COVID. The Chinese University of Hong Kong’s (CUHK) Faculty of Medicine (CU Medicine) conducted a triple-blind, randomised, placebo-controlled clinical trial and showed that modulation of the gut microbiome using oral microencapsulated live bacteria (SIM01) developed by CUHK led to improvement in long COVID symptoms. Findings of the study were presented in May 2023 at the late breaking abstract plenary session in a world leading international conference (Digestive Disease Week 2023) in Chicago.

 

 A randomised placebo-controlled clinical trial by CU Medicine shows that  modulation of gut microbiome using oral microencapsulated live bacteria (SIM01)  improves long COVID symptoms.

CU Medicine conducted a triple-blind, randomised, placebo-controlled clinical trial and showed that modulation of the gut microbiome using oral microencapsulated live bacteria (SIM01) developed by CUHK led to improvement in long COVID symptoms.

(From left) Professor Martin Wong, Professor from The Jockey Club School of Public Health and Primary Care; Professor Francis KL Chan, Dean and Director of the Centre for Gut Microbiota Research at CU Medicine; and Professor Siew Ng, CU Medicine’s Croucher Professor in Medical Sciences and Director of Microbiota I-Center (MagIC).

Urgent need to identify effective intervention for long COVID symptoms

 

Long COVID is defined as persistence of long-term symptoms beyond four weeks after the diagnosis of COVID-19. Professor Martin Wong Chi-sang, Professor in The Jockey Club School of Public Health and Primary Care at CU Medicine, stated, “Long COVID affects different organs and can be debilitating yet there is no effective treatment. There is an urgent need for clinically proven intervention to improve the physical and psychological impact of long COVID”.

 

Previous studies by CU Medicine have shown that patients with long COVID symptoms had altered gut microbial signatures. Modulation of the gut microbiota therefore represents a potentially useful intervention. The research team at CU Medicine used big data and machine-learning to invent the SIM01 microbiome formula and developed it into an oral formula using microencapsulation technology. Recently, they conducted a triple-blind, randomised, placebo-controlled trial (the RECOVERY study) to assess the efficacy of SIM01 in improving long COVID symptoms across multiple systems and organs.

 

From 2021 to 2022, a total of 463 recovered patients with at least one long COVID symptom joined the RECOVERY study. Their mean age was 49 years old and 65.4% were female. Nearly 70% of participants were suspected to have been infected with the Omicron variant. All subjects were randomly assigned to receive SIM01 or a placebo containing low dose Vitamin C for six months.

 

More patients who received SIM01 showed improvement in digestive and neurological symptoms

The researchers found that significantly more patients who received SIM01 than those who had placebo showed improvement in digestive problems, fatigue, difficulty in concentrating, memory loss and general unwellness at six months follow-up (see details in Table 1). Metagenomic analysis of their stool showed that SIM01 resulted in increased bacteria diversity, increased abundance of “favourable” bacteria and reduced abundance of “unfavourable” bacteria in the gut, highlighting the effectiveness of SIM01 in restoring gut dysbiosis.

Professor Siew Ng, CU Medicine’s Croucher Professor of Medical Sciences and Director of Microbiota I-Center (MagIC), commented, “To our knowledge, this is the first clinical trial to show that modulation of the gut microbiome can improve long COVID symptoms including memory and concentration problems. These data support the importance of the gut-brain axis. Restoring a healthy gut microbiota is a novel approach to improve neurological symptoms via the production of beneficial metabolites from gut bacteria that circulate to the brain to improve brain function”.

 

Professor Francis KL Chan, Dean of Medicine and Director of the Centre for Gut Microbiota Research at CU Medicine, concluded, “The development of conventional probiotics into a microbiome formula requires a lot of clinical data, metagenomics analysis, and microencapsulation technology. We will strive to develop more clinical applications of gut microbiome.”

 

This study was supported by the Health and Medical Research Fund, the Health Bureau, The Government of the Hong Kong Special Administrative Region.

 

Table 1:Details of study results

 

 Proportion of subjects with improvement 

Long COVID

symptoms

SIM01PlaceboRelative benefit increase

Digestive problems

70.2%

54.1%

29.8%

Fatigue

62.8%

42.6%

47.4%

Difficulty in concentration

62.3%

38.5%

61.8%

Memory loss

42.0%

26.9%

56.1%

General unwellness

77.3%

59.0%

30.8%

 

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Research
Hong Kong and Macau Among Top Three Regions in Asia-Pacific with the Highest Incidence of Inflammatory Bowel Disease CUHK Establishes Registry to Increase Public Awareness

Hong Kong and Macau Among Top Three Regions in Asia-Pacific with the Highest Incidence of Inflammatory Bowel Disease CUHK Establishes Registry to Increase Public Awareness

Research
CUHK discovers that 40% of Individuals at Risk of Coronary Heart Disease have Pre-cancerous Bowel Tumors

CUHK discovers that 40% of Individuals at Risk of Coronary Heart Disease have Pre-cancerous Bowel Tumors

Research
CUHK Introduces Double Balloon Enteroscopy Service to Manage Small Bowel Diseases

CUHK Introduces Double Balloon Enteroscopy Service to Manage Small Bowel Diseases

Clinical service

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