Fri. Oct 18th, 2019

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An Innovative Treatment for Non-Alcoholic Fatty Liver Disease Patients with Diabetes

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An Innovative Treatment for Non-Alcoholic Fatty Liver Disease Patients with Diabetes

From left to right: Associate Professor Teoh Yee Leong, CEO of Singapore Clinical Research Institute; Dr. S. Sendhil Velan, Head of Metabolic Imaging Group, A*STAR’s Singapore BioImaging Consortium (SBIC); and Dr Eveline Bruinstroop, Research Fellow, Duke-NUS Medical School

 

Non-alcoholic fatty liver disease (NAFLD) is a major global health problem characterized by accumulation of fat in the liver. NAFLD develops in patients with obesity, diabetes type 2, dyslipidaemia and insulin resistance. The presence of excess fat in the liver can long be a silent process; however, as the disease progresses the liver will be unable to function normally, which in this stage the damage is non-reversible. Currently, it is estimated that 30-40% of the Singaporeans are affected with no treatment available. Professor Paul M. Yen’s group at Duke-NUS Medical School previously showed that thyroid hormone was important for metabolism of fatty acids in rodent liver and cell culture models. Additionally, they showed that thyroid hormone levels in the liver may be decreased in rats with NAFLD; thus, supplementation with thyroid hormone could be beneficial for patients with NAFLD.

Dr Eveline Bruinstroop and Professor Yen from Duke-NUS Medical School, in collaboration with the Singapore Clinical Research Institute (SCRI), and Dr. S. Sendhil Velan from the Agency of Science and Technology Research (A*STAR)’s Singapore Bioimaging Consortium (SBIC), recently completed a clinical study that showed low dose thyroid hormone supplementation may be beneficial for reducing fatty liver in male diabetic patients with NAFLD. The study was funded by Tanoto Initiative for Diabetes Research and the trial and was conducted through the Metabolic Research Network (MRN) of SCRI, and involved six clinical centres across Singapore: Tan Tock Seng Hospital (TTSH), Singapore General Hospital (SGH), Ng Teng Feng General Hospital (NTFGH), Changi General Hospital (CGH), Khoo Teck Puat Hospital (KTPH), and National University Hospital (NUH). Dr. Rinkoo Dalan from TTSH was the main clinical investigator of the study.

Twenty NAFLD patients with stable type 2 diabetes and normal thyroid function were treated with thyroxine hormone therapy for 4 months at the particular dosage that was tailored to obtain the desirable TH level individually. Magnetic resonance imaging (MRI) was performed before and after TH treatment to measure the changes in various fat depots including liver fat content. Other clinical measurements such as the control of blood glucose levels were also monitored. Patients that had a larger decrease in intrahepatic lipid content also showed improvements of their diabetes.

Professor Yen, who is from the Cardiovascular and Metabolic Disorders Programme at Duke-NUS Medical School, said, “This is the first clinical study that showed low dose thyroid hormone decreases both liver fat as well as overall body fat in a safe manner in male type 2 diabetic patients with NAFLD. The decrease in liver fat also correlates with an improvement in diabetes control after treatment. This pilot study provides a strong rationale for further investigation, development, and testing of thyroid hormone or thyroid hormone analogues in diabetic patients with NAFLD”.

Associate Professor Teoh Yee Leong, CEO of Singapore Clinical Research Institute, said “This multi-centre trial showcased the capabilities and the strong partnerships of various Singapore research institutions and key clinicians in metabolic disease domain through this research network. This is the first such collaboration, and hopefully there will be more clinical studies that involve the doctors from the six key public sector hospitals in Singapore”.

In this study, SBIC’s Dr S. Sendhil Velan and his team implemented non-invasive magnetic resonance imaging and spectroscopic techniques to quantitatively assess visceral fat, subcutaneous fat and liver fat before and after TH treatment in NAFLD patients. SBIC plans to conduct more studies to evaluate the changes in fat composition within liver fat in response to an intervention.

Dr S. Sendhil Velan, who is head of SBIC’s Metabolic Imaging Group which conducts translational imaging research in the domain of metabolic diseases, said, “Through leveraging our collective expertise and capabilities, we gained valuable insights into the relationship between the thyroid hormone and the metabolism of fatty acids in functional organs. The successful clinical study affirms magnetic resonance imaging and spectroscopic approaches as gold standards for measuring metabolic activity, and these will support future clinical studies in non-alcoholic fatty liver disease, and the development of medical treatments that improve health outcomes”.

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