Immune cell diversity and regenerative markers reveal interactions among macrophages, rodlet cells, and stem cells in the kidney of Poecilia sphenops
Abstract The kidneys of molly fish (Poecilia sphenops) exhibit complex immune and cellular activities, which are crucial for maintaining renal function and responding to environmental stressors. This study aimed to investigate the histological and immunohistochemical characteristics of immune cells,...
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Nature Portfolio
2025-07-01
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| Online Access: | https://doi.org/10.1038/s41598-025-11679-3 |
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| author | Ramy K. A. Sayed Marwa Bakry Doaa M. Mokhtar |
| author_facet | Ramy K. A. Sayed Marwa Bakry Doaa M. Mokhtar |
| author_sort | Ramy K. A. Sayed |
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| description | Abstract The kidneys of molly fish (Poecilia sphenops) exhibit complex immune and cellular activities, which are crucial for maintaining renal function and responding to environmental stressors. This study aimed to investigate the histological and immunohistochemical characteristics of immune cells, autophagy, and stem cell activity within the renal tissues of molly fish. Histological analysis revealed the presence of immune cells, including macrophages and granular leukocytes, concentrated around the renal corpuscles (RC) and renal tubules (RT). Additionally, numerous lymphocytes were observed surrounding the RC, and a notable presence of rodlet cells with a thick capsule and rodlet-like inclusions was detected around the RT. Immunohistochemical staining confirmed macrophage activity through CD68 and Iba1 expression, while APG5, an autophagy marker, was observed in macrophages, rodlet cells, and podocytes, indicating active autophagic processes. Polymorphic granulocytes expressed iNOS-2. Inflammatory markers IL-1β and NF-κB were highly expressed in rodlet cells and macrophages, respectively, suggesting their role in immune modulation. The expression of S100 protein in rodlet cells and acetylcholine in macrophages further highlights their specialized functions in immune regulation. Additionally, renal stem cells were identified by expressing Nrf2 and Sox9, indicating a potential role in tissue repair and regeneration. These findings provide critical insights into the kidney’s dual function in immunity and regeneration, contributing to a better understanding of fish renal physiology and potential applications in environmental monitoring and aquaculture health management. |
| format | Article |
| id | doaj-art-89b7926ed5ed4d34ac74bbe97f5e8a27 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-89b7926ed5ed4d34ac74bbe97f5e8a272025-08-20T03:42:25ZengNature PortfolioScientific Reports2045-23222025-07-0115111310.1038/s41598-025-11679-3Immune cell diversity and regenerative markers reveal interactions among macrophages, rodlet cells, and stem cells in the kidney of Poecilia sphenopsRamy K. A. Sayed0Marwa Bakry1Doaa M. Mokhtar2Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Sohag UniversityDepartment of Cell and Tissues, Faculty of Veterinary Medicine, Assiut UniversityDepartment of Cell and Tissues, Faculty of Veterinary Medicine, Assiut UniversityAbstract The kidneys of molly fish (Poecilia sphenops) exhibit complex immune and cellular activities, which are crucial for maintaining renal function and responding to environmental stressors. This study aimed to investigate the histological and immunohistochemical characteristics of immune cells, autophagy, and stem cell activity within the renal tissues of molly fish. Histological analysis revealed the presence of immune cells, including macrophages and granular leukocytes, concentrated around the renal corpuscles (RC) and renal tubules (RT). Additionally, numerous lymphocytes were observed surrounding the RC, and a notable presence of rodlet cells with a thick capsule and rodlet-like inclusions was detected around the RT. Immunohistochemical staining confirmed macrophage activity through CD68 and Iba1 expression, while APG5, an autophagy marker, was observed in macrophages, rodlet cells, and podocytes, indicating active autophagic processes. Polymorphic granulocytes expressed iNOS-2. Inflammatory markers IL-1β and NF-κB were highly expressed in rodlet cells and macrophages, respectively, suggesting their role in immune modulation. The expression of S100 protein in rodlet cells and acetylcholine in macrophages further highlights their specialized functions in immune regulation. Additionally, renal stem cells were identified by expressing Nrf2 and Sox9, indicating a potential role in tissue repair and regeneration. These findings provide critical insights into the kidney’s dual function in immunity and regeneration, contributing to a better understanding of fish renal physiology and potential applications in environmental monitoring and aquaculture health management.https://doi.org/10.1038/s41598-025-11679-3MacrophagesNrf2Rodlet cellsS100 proteinSox9 |
| spellingShingle | Ramy K. A. Sayed Marwa Bakry Doaa M. Mokhtar Immune cell diversity and regenerative markers reveal interactions among macrophages, rodlet cells, and stem cells in the kidney of Poecilia sphenops Scientific Reports Macrophages Nrf2 Rodlet cells S100 protein Sox9 |
| title | Immune cell diversity and regenerative markers reveal interactions among macrophages, rodlet cells, and stem cells in the kidney of Poecilia sphenops |
| title_full | Immune cell diversity and regenerative markers reveal interactions among macrophages, rodlet cells, and stem cells in the kidney of Poecilia sphenops |
| title_fullStr | Immune cell diversity and regenerative markers reveal interactions among macrophages, rodlet cells, and stem cells in the kidney of Poecilia sphenops |
| title_full_unstemmed | Immune cell diversity and regenerative markers reveal interactions among macrophages, rodlet cells, and stem cells in the kidney of Poecilia sphenops |
| title_short | Immune cell diversity and regenerative markers reveal interactions among macrophages, rodlet cells, and stem cells in the kidney of Poecilia sphenops |
| title_sort | immune cell diversity and regenerative markers reveal interactions among macrophages rodlet cells and stem cells in the kidney of poecilia sphenops |
| topic | Macrophages Nrf2 Rodlet cells S100 protein Sox9 |
| url | https://doi.org/10.1038/s41598-025-11679-3 |
| work_keys_str_mv | AT ramykasayed immunecelldiversityandregenerativemarkersrevealinteractionsamongmacrophagesrodletcellsandstemcellsinthekidneyofpoeciliasphenops AT marwabakry immunecelldiversityandregenerativemarkersrevealinteractionsamongmacrophagesrodletcellsandstemcellsinthekidneyofpoeciliasphenops AT doaammokhtar immunecelldiversityandregenerativemarkersrevealinteractionsamongmacrophagesrodletcellsandstemcellsinthekidneyofpoeciliasphenops |