Pancreatic injury induces β-cell regeneration in axolotl.

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Tác giả: Adnan Abouelela, Stuart G Akeson, Steven J Blair, Anita Dittrich, Miten Jain, Ashley R Juarez, Ryan T Kim, Noah J Lopez, Duygu Payzin-Dogru, Connor J Powell, Aaron M Savage, Hani D Singer, Jessica L Whited

Ngôn ngữ: eng

Ký hiệu phân loại: 305.568 +Alienated and excluded classes

Thông tin xuất bản: United States : bioRxiv : the preprint server for biology , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 217987

BACKGROUND: Diabetes is a condition characterized by a loss of pancreatic β-cell function which results in the dysregulation of insulin homeostasis. Using a partial pancreatectomy model in axolotl, we aimed to observe the pancreatic response to injury. RESULTS: Here we show a comprehensive histological assessment of pancreatic islets in axolotl. Following pancreatic injury, no apparent blastemal structure was observed. We found a significant, organ-wide increase in cellular proliferation post-resection in the pancreas compared to sham-operated controls. This proliferative response was most robust at the site of injury. We found that β-cells actively contributed to the increased rates of proliferation upon injury. β-cell proliferation manifested in increased β-cell mass in injured tissue at two weeks post injury. At four weeks post injury, we found organ-wide proliferation to be extinguished while proliferation at the injury site persisted, corresponding to pancreatic tissue recovery. Similarly, total β-cell mass was comparable to sham after four weeks. CONCLUSIONS: Our findings suggest a non-blastema-mediated regeneration process takes place in the pancreas, by which pancreatic resection induces whole-organ β-cell proliferation without the formation of a blastemal structure. This process is analogous to other models of compensatory growth in axolotl, including liver regeneration.
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