1. Stem Cell Therapy for Ischemic Liver Injury: نهج واعد
Ischemic liver injury, a severe condition resulting from restricted blood flow to the liver, poses a significant challenge in transplantation and surgical procedures. العلاج بالخلايا الجذعية has emerged as a promising therapeutic strategy, offering the potential to regenerate damaged liver tissue and restore liver function.
2. Pathophysiology of Ischemic Liver Injury and Stem Cell Intervention
Ischemic liver injury occurs when blood flow to the liver is obstructed, leading to cellular hypoxia and oxidative stress. This triggers a cascade of events, including hepatocyte apoptosis, اشتعال, والتليف. الخلايا الجذعية, with their regenerative and immunomodulatory properties, can intervene at various stages of this process, promoting tissue repair and functional recovery.
3. Types of Stem Cells Used in Ischemic Liver Injury Treatment
Various types of stem cells have been investigated for ischemic liver injury treatment, مشتمل:
- الخلايا الجذعية الجنينية (المجالس الاقتصادية والاجتماعية): Pluripotent cells derived from the inner cell mass of blastocysts.
- الخلايا الجذعية المحفزة (iPSCs): Reprogrammed somatic cells that exhibit pluripotency similar to ESCs.
- الخلايا الجذعية الوسيطة (اللجان الدائمة): Multipotent stromal cells found in various tissues, مثل نخاع العظام والأنسجة الدهنية.
- الخلايا الجذعية الكبدية (HSCs): Progenitor cells residing within the liver.
4. Mechanisms of Action of Stem Cells in Liver Regeneration
Stem cells contribute to liver regeneration through several mechanisms:
- التمايز: Stem cells can differentiate into mature hepatocytes and other liver cell types, replacing damaged tissue.
- آثار باراكرين: تفرز الخلايا الجذعية عوامل النمو, السيتوكينات, and other molecules that promote liver cell proliferation, الهجرة, and survival.
- تعديل المناعة: Stem cells regulate immune responses, reducing inflammation and fibrosis, which are detrimental to liver regeneration.
