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Updated: Mar 14, 2026

Application of RNAi and Heat-shock-induced Transcription Factor Expression to Reprogram Germ Cells to Neurons in C. elegans
Published on: January 1, 2018
Somatically expressed germ-granule components, PGL-1 and PGL-3, repress programmed cell death in C. elegans
Mohammad Al-Amin1, Hyemin Min1, Yhong-Hee Shim1
1Department of Bioscience and Biotechnology, Konkuk University, Seoul, Republic of Korea.
Germ-granule proteins PGL-1 and PGL-3 negatively regulate apoptosis in both germ and somatic cells of C. elegans. Loss of these proteins increases germline cell death, while their ectopic expression reduces somatic cell death.
Area of Science:
- Cell Biology
- Genetics
- Developmental Biology
Background:
- Germ-granule components PGL-1 and PGL-3 are essential for germline integrity in C. elegans.
- Previous studies indicated that loss of PGL-1 and PGL-3 leads to increased germline apoptosis.
Purpose of the Study:
- To investigate the role of PGL-1 and PGL-3 in somatic apoptosis.
- To determine the regulatory mechanisms of somatic apoptosis involving germ-granule components.
Main Methods:
- Analysis of apoptosis in C. elegans mutants, including synthetic multivulva class B (synMuv B) mutants.
- Investigation of gene expression, specifically CED-4, in relation to PGL-1 and PGL-3.
- Induction of DNA damage to assess apoptosis in wild-type and mutant backgrounds.
- Ectopic expression of pgl-1 and pgl-3 transgenes in somatic cells.
Main Results:
- Somatic apoptosis was reduced in synMuv B mutants due to ectopic PGL-1 and PGL-3 expression.
- CED-4 expression levels were reduced in synMuv B-mutant somatic cells with ectopic PGL-1.
- Somatic apoptosis in synMuv B mutants increased after DNA damage in a SIR-2.1-dependent manner.
- Ectopic expression of pgl-1 and/or pgl-3 repressed somatic apoptosis in wild-type cells.
Conclusions:
- Germ-granule components PGL-1 and PGL-3 function as negative regulators of apoptosis in both the germline and soma of C. elegans.
- PGL-1 and PGL-3 influence somatic apoptosis pathways, potentially through modulation of CED-4 expression.
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