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Development of germ cell transplants: morphometric and ultrastructural studies.
G G Parreira1, T Ogawa, M R Avarbock
1Department of Physiology, Southern Illinois University School of Medicine, Carbondale 62901-6512, USA.
Tissue & Cell
|September 11, 1999
Summary
Transplanted mouse germ cells interact with Sertoli cells and are mostly phagocytosed. Some germ cells briefly divide, and macrophages appear in testes after transplantation.
Area of Science:
- Reproductive Biology
- Cell Biology
- Histology
Background:
- Sertoli cells are crucial for spermatogenesis, providing structural and nutritional support.
- Understanding germ cell transplantation is key for reproductive research and therapies.
Purpose of the Study:
- To investigate the fate and interactions of transplanted mouse germ cells within the seminiferous tubule environment.
- To analyze the host Sertoli cell and peritubular tissue response to germ cell transplantation.
Main Methods:
- Mouse-to-mouse germ cell transplantation.
- Morphometric and ultrastructural analysis at various time points (10 min to 3 months).
- Light microscopy and electron microscopy.
Main Results:
- Transplanted germ cells rapidly interact with Sertoli cell processes.
- Most germ cells are phagocytosed by Sertoli cells within weeks.
- Evidence of limited germ cell division and survival observed.
- Increased macrophage presence and activation noted in the peritubular tissue and tubule lumen.
- Testis weight increase at 24 hours is attributed to increased tubular lumen volume, potentially due to Sertoli cell secretion.
Conclusions:
- Transplanted germ cells undergo phagocytosis but can transiently survive and divide.
- Sertoli cells and macrophages play significant roles in managing transplanted germ cells.
- The seminiferous tubule environment exhibits dynamic changes post-transplantation, including Sertoli cell secretion.