AI Article Synopsis
- Cytokeratins are a large group of intermediate filament proteins important for epithelial tissues, with over 20 types that are expressed differently in various tissues.
- The study utilized immunohistochemistry and confocal microscopy to analyze specific cytokeratin subtypes in the biliary system of adult rat livers, identifying a CK19+/7- cholangiocyte population in smaller bile ducts that proliferated after 2-acetaminofluorene treatment.
- These CK19+/7- cholangiocytes emerged postnatally and may indicate the presence of adult hepatic stem cells in rats, while a similar population wasn't found in human livers.
Article Abstract
Cytokeratins are the largest subfamily of intermediate filament proteins and include more than 20 different gene products, which are expressed in an epithelial tissue-specific manner. We studied by immunohistochemistry and confocal microscopy the distribution of cytokeratin subtypes in the biliary system of adult rat liver. A cytokeratin (CK)19+/7- cholangiocyte population was observed in the smaller branches of the biliary tree including the canals of Hering. They proliferated after 2-acetaminofluorene (AAF) administration, although later the typical oval cells expressed CK7. This observation suggests that cholangiocytes with this cytokeratin phenotype may harbor adult hepatic stem cells. The CK19+/7- cholangiocytes were not present in the rat liver at birth, but developed postnatally. Similar cell populations were not observed in human livers. In conclusion, we propose that the CK19+/7- phenotype may be characteristic for adult hepatic stem cells in rat liver and that these cells are generated de novo after birth.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/hep.20858 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
H. Wendl Leaf Metabolites Potentiate the Radiosensitivity of Hepatocellular Carcinoma Through Ki67 and PARP Inhibition.
Integr Cancer Ther
January 2025
National Centre for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt.
Objectives: Hepatocellular carcinoma (HCC) represents the third-most prevalent cancer in humans worldwide. The current study's objective is to search for the potentiality of H. Wendl () leaf extract in a nanoemulsion (NE) form in enhancing radiotherapy against HCC induced in rats using diethylnitrosamine (DEN).
View Article and Find Full Text PDFThe Role of Key Molecules of Pyroptosis in Liver Damage of Rats With Exertional Heat Stroke.
Gastroenterol Res Pract
January 2025
Department of Hepatobiliary Disease, 900th Hospital of Joint Logistics Support Force, Fuzhou General Clinical Medical College of Fujian Medical University, Fuzhou, Fujian, China.
This study is aimed at investigating the role of key molecular elements involved in pyroptosis in liver injury caused by exertional heat stroke (EHS). We established a model of EHS-induced liver injury in Sprague-Dawley rats, with a control group (receiving no treatment) for comparison and 12 rats in each group. Alanine transaminase (ALT) and aspartate transaminase (AST) levels in the blood were detected.
View Article and Find Full Text PDFNovel chlorinated oxime K870 protects rats against paraoxon poisoning better than obidoxime.
Drug Chem Toxicol
January 2025
Centre for Biomedical Research, Faculty of Medicine, University of Banja Luka, Banja Luka, Bosnia and Herzegovina.
The aim of this study was to determine the antidotal potential of the chlorinated oxime K870 compared to obidoxime, as a monotherapy and in combination with atropine, in paraoxon (POX)-poisoned rats. The treatment doses of oximes were chosen as 20% of their LD values. The protective ratio (PR) of oxime K870 with atropine was significantly higher than that of obidoxime with atropine (68.
View Article and Find Full Text PDFZinc oxide nanoparticle-embedded tannic acid/chitosan-based sponge: A highly absorbent hemostatic agent with enhanced antimicrobial activity.
Int J Biol Macromol
January 2025
Nanotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1416634793, Iran; Wound Care Solution, Nano Fanavaran Narin Teb Co., Tehran, P.O. Box 19177-53531, Iran; Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ), University of Siegen, 57076 Siegen, Germany. Electronic address:
This study reports the development of a highly absorbent Chitosan (CS)/Tannic Acid (TA) sponge, synthesized via chemical cross-linking with Epichlorohydrin (ECH) and integrated with zinc oxide nanoparticles (ZnO NPs) as a novel hemostatic anti-infection agent. The chemical properties of the sponges were characterized using Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and zeta potential measurements. Morphological and elemental analyses conducted through scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDAX) revealed a uniform distribution of ZnO NPs, with particle sizes below 20 nm.
View Article and Find Full Text PDFInvolvement of nuclear atrophy of binucleated hepatocytes in the large micronucleus formation induced by rat hepatocarcinogen acetamide.
Toxicol Appl Pharmacol
January 2025
Division of Pathology, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan.
Acetamide is a hepatocarcinogen in rats. We previously revealed that acetamide induces characteristic large micronuclei in rat liver, suggesting the possible involvement of chromosome aberrations in acetamide-induced hepatocarcinogenesis. To elucidate the mechanism of large micronuclei formation, in this study we examined time-dependent changes in rat hepatocytes after administration of acetamide.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!