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Updated: Aug 14, 2026
Isolation, Culture, and Imaging of Human Fetal Pancreatic Cell Clusters
Published on: May 18, 2014
Distribution of CIAPIN1 in normal fetal and adult human tissues
Zhiming Hao1, Xiaohua Li, Taidong Qiao
1State Key Laboratory of Cancer Biology, Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, 710032 Shaanxi Province, China.
Abstract:
CIAPIN1, a newly identified antiapoptotic molecule that plays an essential role in mouse definitive hematopoiesis, is considered a downstream effector of the receptor tyrosine kinase-Ras signaling pathway. Our previous studies have indicated that CIAPIN1 is involved in the development of multidrug resistance (MDR) in gastric cancer cells. However, the mechanism of CIAPIN1-mediated antiapoptosis and MDR has not been fully elucidated. To reveal the possible physiological role of CIAPIN1, we examined the expression and distribution of CIAPIN1 in fetal and adult human tissues using immunohistochemistry. We found that CIAPIN1 was ubiquitously distributed in fetal and adult tissues, and was localized in both the cytoplasm and the nucleus. The expression patterns of CIAPIN1 were similar in fetal and adult tissues, and was correlated with the previously described expression pattern of p21ras. These observations suggest that CIAPIN1 expression appears to be involved in cell differentiation, and that it might exert universal and possibly important physiological functions under the regulation of Ras in humans.
Insights
Cellular inhibitor of apoptosis protein-1 (CIAPIN1) is widely present in human tissues and may play a role in cell differentiation and Ras-regulated functions.
Area of Science:
- Molecular Biology
- Cell Biology
- Human Physiology
Background:
- CIAPIN1 is an antiapoptotic molecule crucial for hematopoiesis.
- CIAPIN1 is implicated in multidrug resistance (MDR) in gastric cancer.
- The precise mechanisms of CIAPIN1's antiapoptotic and MDR roles require further investigation.
Purpose of the Study:
- To investigate the physiological role of CIAPIN1 in human tissues.
- To determine the expression and distribution of CIAPIN1 in fetal and adult human tissues.
Main Methods:
- Immunohistochemistry was employed to examine CIAPIN1 expression and localization.
- Expression patterns were analyzed in both fetal and adult human tissue samples.
Main Results:
- CIAPIN1 demonstrated ubiquitous distribution across fetal and adult human tissues.
- CIAPIN1 was found to localize in both cellular cytoplasm and nucleus.
- Expression patterns of CIAPIN1 mirrored those of p21ras, suggesting a correlation.
Conclusions:
- CIAPIN1 expression is widespread in human tissues, indicating potential universal physiological functions.
- CIAPIN1's expression pattern suggests involvement in cell differentiation processes.
- CIAPIN1 may function under the regulation of Ras signaling in humans.
