Chronic hepatitis C and B are important and growing causes of morbidity and mortality in the United States. In particular, a disproportionate burden of mortality is borne by groups with specific disease susceptibilities. These include patients with HIV coinfection and patients undergoing liver transplantation for HCV and HBV-related complications, both of whom experience accelerated natural history of disease. The basis for these observations is not well understood, but an increasing number of plausible hypotheses have been suggested by our preclinical work. As with the original submission of this application in the first cycle of this grant, this proposal demonstrates the candidate's track record of productivity and lengthy commitment to patient-oriented research in viral hepatitis and his record of mentorship in the development of junior faculty and fellows embarking on clinical and translational research careers in liver disease. Over the past grant cycle, Dr. Chung has fully followed through on the original aims of the proposal, which were to (1) mentor fellows and junior faculty in initiation of patient-oriented research careers in the study of HCV disease in special populations;and (2) initiate innovative pilot clinical trials in HCV based on key observations from our mechanistic work. During the first cycle of this Award, Dr. Chung has mentored over 20 Fellows and junior faculty, and many have secured NIH or foundation funding. The focus of the next cycle of Dr. Chung's program will be to integrate advances in the continuum of translational investigation into the training of the next generation of clinical researchers. These include the creation of disease cohorts, genomic and other discovery surveys of these cohorts, identification of biomarkers and therapeutic targets, development of novel therapies, application of these therapies in first in man proof of concept studies, application of biomarkers for use in disease prognostication and modeling. In this regard, Aim 1, development of clinical prediction models and disease management algorithms that incorporate fundamental discoveries such as genetic markers, will be an important focus for young clinical investigators in the next grant cycle, as will creation of novel disease cohorts, such as those with HBV-HIV coinfection.
In Aim 2, advances in discovery will be tested in the therapeutic arena. These advances include our mechanistic work defining the dependence of HCV on cholesterol intermediates and the efficacy of statins in the viral lifecycle, along with our discovery that a flavonoid, naringenin, has antiviral effects against HCV secretion. This work will form the basis for design of innovative pilot clinical trials, including studies of agents to prevet allograft HCV infection, the most important source of mortality in persons undergoing liver transplantation (LT). In this vein, the PI's role as Vice Chair of the ACTG Hepatitis Transformative Science Group (TSG) will also enable the initiation of junior investigators in several exciting proof of concept studies testing novel combinations of direct acting antiviral agents and statins against HCV in both HIV(-) and HIV(+) hosts. Similarly, the PI's participation with the MGH Translational Medicine Group (TMG) will also permit engagement of junior investigators in translational studies of early phase compounds in special populations such as post-LT HCV. Collectively, these studies will offer rich opportunities for clinical investigators t be mentored as they enter the highly interdigitated continuum of translational investigation. In so doing, it is anticipated by Dr. Chung that they will themselves mentor their own fellows and faculty, thereby creating a highly desirable multiplier effect.

Public Health Relevance

The training of the next generation of clinical and translational investigators in liver disease will require concerted efforts to harness the explosion of knowledge that has been enabled by 21st century technologies. An effective approach must today incorporate a fundamental understanding of the process from creation of populations of patients with disease, to making genetic and other discoveries in these patients, to functionally decoding the basis for these discoveries, to developing treatments based on the understanding of these decoded targets, to applying these treatments and markers back to the original disease population, and finally understanding how these discoveries can make our clinical decisions more effective. We plan to apply these modern tenets of translational medicine to special populations of patients with chronic viral hepatitis, in so doing making important headway in halting or slowing disease progression in these particularly vulnerable groups.

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Midcareer Investigator Award in Patient-Oriented Research (K24)
Project #
5K24DK078772-08
Application #
8735006
Study Section
Diabetes, Endocrinology and Metabolic Diseases B Subcommittee (DDK)
Program Officer
Podskalny, Judith M,
Project Start
2007-09-01
Project End
2017-08-31
Budget Start
2014-09-01
Budget End
2015-08-31
Support Year
8
Fiscal Year
2014
Total Cost
$160,354
Indirect Cost
$11,878
Name
Massachusetts General Hospital
Department
Type
DUNS #
073130411
City
Boston
State
MA
Country
United States
Zip Code
02199
Simon, Tracey G; King, Lindsay Y; Zheng, Hui et al. (2015) Statin use is associated with a reduced risk of fibrosis progression in chronic hepatitis C. J Hepatol 62:18-23
Johnson, Kara B; Campbell, Emily J; Chi, Heng et al. (2014) Advanced disease, diuretic use, and marital status predict hospital admissions in an ambulatory cirrhosis cohort. Dig Dis Sci 59:174-82
Wu, Ying; Johnson, Kara B; Roccaro, Giorgio et al. (2014) Poor adherence to AASLD guidelines for chronic hepatitis B Management and treatment in a large academic medical center. Am J Gastroenterol 109:867-75
Hong, Jian; Yuan, Yunfei; Wang, Jianping et al. (2014) Expression of variant isoforms of the tyrosine kinase SYK determines the prognosis of hepatocellular carcinoma. Cancer Res 74:1845-56
Motola, Daniel L; Caravan, Peter; Chung, Raymond T et al. (2014) Noninvasive Biomarkers of Liver Fibrosis: Clinical Applications and Future Directions. Curr Pathobiol Rep 2:245-256
Marks, Kristen M; Kitch, Douglas; Chung, Raymond T et al. (2014) Pilot study of pioglitazone before HCV retreatment in HIV/HCV genotype 1-infected subjects with insulin resistance and previous nonresponse to peginterferon and ribavirin therapy: A5239. J Acquir Immune Defic Syndr 65:345-9
Wright, A J; Fishman, J A; Chung, R T (2014) Lamivudine compared with newer antivirals for prophylaxis of hepatitis B core antibody positive livers: a cost-effectiveness analysis. Am J Transplant 14:629-34
Corey, Kathleen E; Misdraji, Joseph; Gelrud, Lou et al. (2014) Nonalcoholic steatohepatitis is associated with an atherogenic lipoprotein subfraction profile. Lipids Health Dis 13:100
Hoshida, Yujin; Villanueva, Augusto; Sangiovanni, Angelo et al. (2013) Prognostic gene expression signature for patients with hepatitis C-related early-stage cirrhosis. Gastroenterology 144:1024-30
Shao, Run-Xuan; Zhang, Leiliang; Hong, Zhi et al. (2013) SOCS1 abrogates IFN's antiviral effect on hepatitis C virus replication. Antiviral Res 97:101-7

Showing the most recent 10 out of 45 publications