three-dimensional-collagen-matrix-scaffold-implantation-as-liver

Three-Dimensional Collagen Matrix Scaffold Implantation as a Liver Regeneration Strategy

Liver diseases are the leading cause of death worldwide. Excessive alcohol consumption, a high-fat diet, and hepatitis C virus infection promote fibrosis, ...

Universidad Nacional Autónoma de Mexico (UNAM)

Liver fibrosis results from chronic damage to the liver in conjunction with the progressive accumulation of fibrillar extracellular matrix proteins. Fibrosis progression in patients with chronic viral hepatitis is a dynamic process where hepatic stellate cells, the most important contributor cell type, respond to a variety of host genetic factors and viral proteins. The abuse of alcohol, superimposed fatty liver disease, and age at the time of viral infection are some of the factors that accelerate liver fibrosis. Liver biopsy remains the gold standard to diagnose fibrosis and significant advances have been made to develop noninvasive markers for liver fibrosis.

Liver fibrosis and chronic viral hepatitis.

Alcohol is the most accepted addictive substance worldwide and its consumption is related to multiple health, economic, and social problems. The liver is the organ in charge of ethanol metabolism and it is susceptible to alcohol's toxic effects.

The role of oxidative stress in the development of alcoholic liver disease.

Insulin-like growth factor 1 is modulated by the insulin-like growth factor-binding proteins (IGFBPs) that are synthesized in the liver. The aim of the present study was to evaluate the concentrations of IGFBPs 1-7 in patients with chronic hepatitis C and study their association with fibrosis stage.

Production of insulin-like growth factor-binding proteins during the development of hepatic fibrosis due to chronic hepatitis C.

Noninvasive methods for liver disease diagnoses offer great advantages over biopsy, but they cannot be utilized in all cases. Therefore, specific indicators for chronic liver disease management are necessary. The aim was to assess the production of insulin-like growth factor-binding proteins (IGFBPs) 1-7 and their correlation with the different stages of fibrosis in chronic hepatitis C (CHC). A prospective, cross-sectional, multicenter study was conducted. CHC patients were categorized by FibroTest® and/or FibroScan®. Serum concentrations of IGFBPs 1-7 were determined through multiple suspension arrangement array technology. Significant differences were validated by the Kruskal-Wallis and Mann-Whitney U tests. Logistic regression models were performed to assess the association between the IGFBPs and fibrosis stages. The association was determined utilizing odds ratios (ORs), and receiver operating characteristic (ROC) curves were constructed to distinguish the IGFBPs in relation to the diagnosis of fibrosis. IGFBP-1 and IGFBP-7 concentrations were higher in CHC than in the healthy individuals, whereas IGFBP-3, IGFBP-5, and IGFBP-6 were downregulated in the patients. An apparent increase of all the IGFBPs was found at fibrosis stage F4, but with different regulations. IGFBP-2, -4, -6, and -7 had the best OR, showing the relation to fibrosis progression. The ROC curves showed that IGFBP-7 was the only protein that distinguished F1 from F3 and F2 from F3. IGFBPs participate in liver fibrosis progression and could be employed as circulating novel protein panels for diagnosis and as possible therapeutic targets in liver fibrosis progression.

Differential production of insulin-like growth factor-binding proteins in liver fibrosis progression.

Matrix metalloproteinases (MMPs) participate in the degradation of extracellular matrix compounds, maintaining the homeostasis between fibrogenesis and fibrolytic processes in the liver. However, there are few studies on the regulation of liver MMPs in fibrosis progression in humans.

Gabriela Gutierrez-Reyes

Liver,
Pancreas and Motility Laboratory; Unit of Experimental Medicine; School of Medicine,
Liver, Pancreas and Motility Laboratory; Unit of Experimental Medicine; School of Medicine

Universidad Nacional Autónoma de Mexico (UNAM)

Three-Dimensional Collagen Matrix Scaffold Implantation as a Liver Regeneration Strategy

Gabriela Gutierrez-Reyes

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Universidad Nacional Autónoma de Mexico (UNAM)

Three-Dimensional Collagen Matrix Scaffold Implantation as a Liver Regeneration Strategy

Liver,
Pancreas and Motility Laboratory; Unit of Experimental Medicine; School of Medicine,
Liver, Pancreas and Motility Laboratory; Unit of Experimental Medicine; School of Medicine