Mitomycin C and decarbamoyl mitomycin C induce p53-independent p21WAF1/CIP1 activation.
Mitomycin C and decarbamoyl mitomycin C induce p53-independent p21WAF1/CIP1 activation.
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DOI:
10.3892/ijo.2016.3703
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发表时间:
2016-11
影响因子:
5.2
通讯作者:
Champeil E
中科院分区:
文献类型:
--
作者:
Cheng SY;Seo J;Huang BT;Napolitano T;Champeil E
Mitomycin C (MC), a commonly used anticancer drug, induces DNA damage via DNA alkylation. Decarbamoyl mitomycin C (DMC), another mitomycin lacking the carbamate at C10, generates similar lesions as MC. Interstrand cross-links (ICLs) are believed to be the lesions primarily responsible for the cytotoxicity of MC and DMC. The major ICL generated by MC (α-ICL) has a trans stereochemistry at the guanine-drug linkage whereas the major ICL from DMC (β-ICL) has the opposite, cis, stereochemistry. In addition, DMC can provoke strong p53-independent cell death. Our hypothesis is that the stereochemistry of the major unique β-ICL generated by DMC is responsible for this p53-independent cell death signaling. p53 gene is inactively mutated in more than half of human cancers. p21WAF1/CIP1 known as a major effector of p53 is involved in p53-dependent and -independent control of cell proliferation and death. This study revealed the role of p21WAF1/CIP1 on MC and DMC triggered cell damage. MCF-7 (p53-proficient) and K562 (p53-deficient) cells were used. Cell cycle distributions were shifted to the G1/S phase in MCF-7 treated with MC and DMC, but were shifted to the S phase in K562. p21WAF1/CIP1 activation was observed in both cells treated with MC and DMC, and DMC triggered more significant activation. Knocking down p53 in MCF-7 did not attenuate MC and DMC induced p21WAF1/CIP1 activation. The α-ICL itself was enough to cause p21WAF1/CIP1 activation.
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影响因子:
16
作者:
Ben-Yehoyada M;Wang LC;Kozekov ID;Rizzo CJ;Gottesman ME;Gautier J
通讯作者:
Gautier J
影响因子:
--
作者:
Esposito D;Crescenzi E;Sagar V;Loreni F;Russo A;Russo G
通讯作者:
Russo G
影响因子:
8.8
作者:
通讯作者:
--
影响因子:
2.9
作者:
Patrick, Steve M.;Tillison, Kristin;Horn, Jeffrey M.
通讯作者:
Horn, Jeffrey M.
影响因子:
4.8
作者:
Li, Y;Dowbenko, D;Lasky, LA
通讯作者:
Lasky, LA