在急性辐射前列炎中直肠上皮干细胞动力学
Sharmila Ghosh1, Akinori Morita1, Yuichi Nishiyama1
1Graduate School of Biomedical Sciences, Tokushima University, Tokushima 770-8503, Japan.
International journal of molecular sciences
|October 26, 2024
概括
辐射直肠损伤影响放射治疗. 阳性Lgr5干细胞在照射后表现出明显的模式,其结构破坏的门剂量为18 Gy,有助于理解肠道损伤.
科学领域:
- 胃肠病学 胃肠病学
- 辐射瘤学 辐射瘤学
- 干细胞生物学 干细胞生物学
背景情况:
- 辐射直肠损伤是限制腹部和骨盆区域放射治疗剂量的显著副作用.
- 了解Lgr5阳性干细胞在辐射后的行为是理解直肠损伤的关键.
- Lgr5是包括肠道在内的各种组织中干细胞的标志物.
研究的目的:
- 为了研究直肠组织中Lgr5阳性干细胞的辐射后动力学.
- 分析辐射暴露后Lgr5表达和干细胞分布的剂量反应关系.
- 为了确定破坏Lgr5阳性干细胞结构的值辐射剂量.
主要方法:
- 使用Lgr5-EGFP敲入小鼠和LGR5抗体光染色在野生类型的小鼠.
- 进行了qPCR分析,以评估直肠上皮组织中的Lgr5表达水平.
- 进行了剂量反应关系分析和统计分析,以确定值剂量.
主要成果:
- 辐射损伤显著降低了直肠上皮组织中的Lgr5表达.
- 低至中等剂量 (高达10 Gy) 显示了集群的Lgr5种群,而次致命剂量 (20-29 Gy) 导致分散的"Lgr5-点"种群.
- 确定了18 Gy的值剂量,用于破坏Lgr5阳性干细胞结构.
- 在恢复期间,集群Lgr5种群重新出现,点点种群下降,表明再生.
结论:
- Lgr5阳性干细胞的行为随着辐射剂量和恢复时间的变化而动态变化.
- 在实验模型中,确定了18 Gy的值剂量对于理解辐射诱导的肠损伤至关重要.
- 这些发现有助于优化小鼠模型中的辐射剂量,并阐明辐射损伤的组织学过程.
更多相关视频
07:05Important Endpoints and Proliferative Markers to Assess Small Intestinal Injury and Adaptation using a Mouse Model of Chemotherapy-Induced Mucositis
Published on: May 12, 2019
5.8K
06:31Author Spotlight: Studying the Epithelial Effects of Intestinal Inflammation In Vitro on Established Murine Colonoids
Published on: June 2, 2023
939
相关概念视频
Renewal of Intestinal Stem Cells
2.5K
The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
2.5K
Adult Stem Cells
27.9K
Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
27.9K
Role Of Notch Signalling In Intestinal Stem Cell Renewal
2.1K
Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
2.1K
