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Arsenite-induced germline apoptosis through a MAPK-dependent, p53-independent pathway in Caenorhabditis elegans.
Chem Res Toxicol. 2008 Aug; 21(8):1530-5.CR

Abstract

Many studies have shown that arsenite is a potent inducer of apoptosis both in cells and tissues. However, there is a lack of appropriate in vivo animal models to study the underlying mechanisms of arsenite-induced apoptosis. Caenorhabditis elegans is an excellent model organism for studying many biological processes. We showed previously that C. elegans could be used as an in vivo system to investigate the genotoxic effects of arsenite. In order to elucidate the underlying mechanisms of arsenite-induced apoptosis in vivo, in the present study, we used the mutated alleles of the C. elegans homologue of known mammalian genes that are involved in the regulation of apoptosis. Our results showed that the loss-of-function mutations of p53/ cep-1 and DNA damage response (DDR) genes hus-1, clk-2, and egl-1 exhibited significant increase in germline apoptosis under arsenite exposure, whereas arsenite-induced germline apoptosis was blocked in loss-of-function alleles of extracellular signal-regulated kinase (ERK) (lin-45 (ku51), mek-2 (n1989), and mpk-1 (ku1)), c-Jun N-terminal kinase (JNK) (jkk-1 (km2), mek-1 (ks54), jnk-1 (gk7), mkk-4 (ju91)), and p38 (nsy-1 (ag3), sek-1 (ag1), and pmk-1 (km25)) MAPK cascades. These results suggest that arsenite-induced apoptosis occurs independently of p53/ cep-1 and the DNA damage response (DDR) genes hus-1, clk-2, and egl-1 and that the C. elegans caspase gene ced-3, Apaf-1 homologue ced-4, and the MAPK signaling pathways are essential for germline apoptosis. Moreover, our study demonstrates that C. elegans could be a mammalian in vivo substitute model to study the mechanisms of apoptosis.

Authors+Show Affiliations

Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18597494

Citation

Pei, Bei, et al. "Arsenite-induced Germline Apoptosis Through a MAPK-dependent, P53-independent Pathway in Caenorhabditis Elegans." Chemical Research in Toxicology, vol. 21, no. 8, 2008, pp. 1530-5.
Pei B, Wang S, Guo X, et al. Arsenite-induced germline apoptosis through a MAPK-dependent, p53-independent pathway in Caenorhabditis elegans. Chem Res Toxicol. 2008;21(8):1530-5.
Pei, B., Wang, S., Guo, X., Wang, J., Yang, G., Hang, H., & Wu, L. (2008). Arsenite-induced germline apoptosis through a MAPK-dependent, p53-independent pathway in Caenorhabditis elegans. Chemical Research in Toxicology, 21(8), 1530-5. https://doi.org/10.1021/tx800074e
Pei B, et al. Arsenite-induced Germline Apoptosis Through a MAPK-dependent, P53-independent Pathway in Caenorhabditis Elegans. Chem Res Toxicol. 2008;21(8):1530-5. PubMed PMID: 18597494.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Arsenite-induced germline apoptosis through a MAPK-dependent, p53-independent pathway in Caenorhabditis elegans. AU - Pei,Bei, AU - Wang,Shunchang, AU - Guo,Xiaoyin, AU - Wang,Jun, AU - Yang,Gen, AU - Hang,Haiying, AU - Wu,Lijun, Y1 - 2008/07/03/ PY - 2008/7/4/pubmed PY - 2008/10/10/medline PY - 2008/7/4/entrez SP - 1530 EP - 5 JF - Chemical research in toxicology JO - Chem Res Toxicol VL - 21 IS - 8 N2 - Many studies have shown that arsenite is a potent inducer of apoptosis both in cells and tissues. However, there is a lack of appropriate in vivo animal models to study the underlying mechanisms of arsenite-induced apoptosis. Caenorhabditis elegans is an excellent model organism for studying many biological processes. We showed previously that C. elegans could be used as an in vivo system to investigate the genotoxic effects of arsenite. In order to elucidate the underlying mechanisms of arsenite-induced apoptosis in vivo, in the present study, we used the mutated alleles of the C. elegans homologue of known mammalian genes that are involved in the regulation of apoptosis. Our results showed that the loss-of-function mutations of p53/ cep-1 and DNA damage response (DDR) genes hus-1, clk-2, and egl-1 exhibited significant increase in germline apoptosis under arsenite exposure, whereas arsenite-induced germline apoptosis was blocked in loss-of-function alleles of extracellular signal-regulated kinase (ERK) (lin-45 (ku51), mek-2 (n1989), and mpk-1 (ku1)), c-Jun N-terminal kinase (JNK) (jkk-1 (km2), mek-1 (ks54), jnk-1 (gk7), mkk-4 (ju91)), and p38 (nsy-1 (ag3), sek-1 (ag1), and pmk-1 (km25)) MAPK cascades. These results suggest that arsenite-induced apoptosis occurs independently of p53/ cep-1 and the DNA damage response (DDR) genes hus-1, clk-2, and egl-1 and that the C. elegans caspase gene ced-3, Apaf-1 homologue ced-4, and the MAPK signaling pathways are essential for germline apoptosis. Moreover, our study demonstrates that C. elegans could be a mammalian in vivo substitute model to study the mechanisms of apoptosis. SN - 1520-5010 UR - https://www.unboundmedicine.com/medline/citation/18597494/Arsenite_induced_germline_apoptosis_through_a_MAPK_dependent_p53_independent_pathway_in_Caenorhabditis_elegans_ L2 - https://doi.org/10.1021/tx800074e DB - PRIME DP - Unbound Medicine ER -