Immunohistochemical study of stellate cells in patients with chronic viral hepatitis C genotype 1

Vol. 52 No. 1 Suppl., 2011
This supplement was not sponsored by Outside Organizations.

ROMANIAN JOURNAL of MORPHOLOGY and EMBRYOLOGY

Larisa Sandulescu, I. Rogoveanu, T. Ciurea, Maria Victoria Comanescu, C. T. Streba, A. G. Ionescu, Alice Oproaica, M. Ene

Introduction: Hepatic stellate cells (HSC) are key-players in the pathogenesis of liver fibrosis, inducing collagen deposition and abnormal extracellular matrix remodeling. Aim: The purpose of this study was to identify the stellate cells using immunohistochemical techniques and to establish if there is a correlation between the expression of stellate cells and the clinical and histological parameters in patients with chronic viral hepatitis C. Materials and Methods: The studied group included 30 patients with chronic viral hepatitis C genotype 1, in whom a liver biopsy was performed previous to the antiviral treatment. After the histological analyze, the biopsy was stained with an anti-SMA antibody (Dako, Carpinteria, CA). The amount of positive stained area was determined using an arbitrary semiquantitative score from 1 to 4. Results: Our observations suggest that there is a strong correlation between the stellate cells activity, evaluated using a semiquantitative score, and the stage of liver fibrosis (rs=0.76, p<0.001). Also, our study revealed a direct correlation, but less intense, with the necro-inflammatory activity (rs=0.39, p=0.03), the steatosis degree (rs=0.428, p=0.01) and the value of alanine aminotransferase (rs=0.4, p=0.03). The age and the viremia level were not correlated with the activity of the stellate cells. Conclusions: This study suggests that the transition of stellate cells from inactivated state to the state of highly fibrogenic cell is influenced mainly by the histological liver modifications (necroinflammatory activity and steatosis) and less by clinical parameters (age, sex) or the viremia level.

Corresponding author: Larisa Sandulescu, MD, PhD, e-mail: larisasandulescu@yahoo.com

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ROMANIAN JOURNAL of MORPHOLOGY and EMBRYOLOGY

Daniela Puscasiu, Carmen Tatu, R. F. Tatu, Elena Potencz, Roxana Popescu, Ioana Muntean, Doina Verdes

Angiogenesis represents one of the most important factors of the tumor proliferation. Renal carcinoma with clear cells is highly vascularized. Knowing numerous quantification systems of tumor angiogenesis, we used a simple one, the evaluation of the relative vascular density. We studied 61 cases with partial or total nephrectomy performed in the Urology Department of Timisoara County Hospital. We correlated the intensity of angiogenesis with a tumor proliferation factor PCNA (proliferating cell nuclear antigen) and with the monoclonal antibody PC10. Correlation of the two immunohistochemical methods with the degree of the tumor differentiation suggested an inverse ratio between vascular density and tumor proliferation degree.

Corresponding author: Daniela Puscasiu, Assistant Professor, MD, PhD, e-mail: danielapuscsiu@yahoo.com

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