Nicotine induces apoptosis in TM3 mouse Leydig cells

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Presentation transcript:

Nicotine induces apoptosis in TM3 mouse Leydig cells Khae-Hawn Kim, M.D., M.Sc., Kwan-Joong Joo, M.D., Heung-Jae Park, M.D., Ph.D., Chil-Hun Kwon, M.D., Ph.D., Mi-Hyeon Jang, Ph.D., Chang-Ju Kim, M.D., Ph.D. Fertility and Sterility Volume 83, Issue 4, Pages 1093-1099 (April 2005) DOI: 10.1016/j.fertnstert.2004.12.013 Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions

FIGURE 1 Effect of nicotine on cell viability. Viability was determined via MTT assay. Results are presented as the mean ± SEM. An asterisk (*) represents P<.05 compared with the control group. Fertility and Sterility 2005 83, 1093-1099DOI: (10.1016/j.fertnstert.2004.12.013) Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions

FIGURE 2 Characterization of nicotine-induced death in TM3 cells. In the nicotine-treated group, 10 mM of nicotine was incubated for 24 hours. (A) Photomicrograph from a phase-contrast microscope. Cell shrinkage, irregularity in cellular shape, and cellular detachment were seen in the nicotine-treated cultures. (B) TM3 cells stained with DAPI. White arrows indicate condensed nuclei. (C) TM3 cells stained via TUNEL assay. Black arrows indicate where condensed and marginated chromatin have been labeled. All scale bars represent 100 μm. Fertility and Sterility 2005 83, 1093-1099DOI: (10.1016/j.fertnstert.2004.12.013) Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions

FIGURE 3 Electrophoretic examination of the effect of nicotine on the genomic DNA of TM3 cells. Genomic DNA was extracted and analyzed via electrophoresis on 2% agarose gels containing ethidium bromide. (A) Control group; (B) 5 mM nicotine-treated group; (C) 10 mM nicotine-treated group. Fertility and Sterility 2005 83, 1093-1099DOI: (10.1016/j.fertnstert.2004.12.013) Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions

FIGURE 4 Results of reverse transcriptase-polymerase chain reaction analysis of the mRNA levels of bax (a) and bcl-2 (b). Cyclophilin mRNA was also reverse-transcribed and amplified as the internal control. Results are presented as the mean ± SEM. An asterisk (*) represents P<.05 compared with the control group. A, Control group; B, 5 mM nicotine-treated group; C, 10 mM nicotine-treated group. Fertility and Sterility 2005 83, 1093-1099DOI: (10.1016/j.fertnstert.2004.12.013) Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions

FIGURE 5 Result of caspase-3 enzyme assay. Nicotine increased caspase-3 enzyme activity. Results are presented as the mean ± SEM. An asterisk (*) represents P<.05 compared with the control group. The rate of DEVD-pNA cleavage was measured at 405 nm. DEVD-fmk is a caspase inhibitor. Fertility and Sterility 2005 83, 1093-1099DOI: (10.1016/j.fertnstert.2004.12.013) Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions

FIGURE 6 Result of Western blot analysis of caspase-3 protein level. The internal control, β-actin, was detected at the band corresponding to 46 kDa. A, Control group; B, 5 mM nicotine-treated group; C, 10 mM nicotine-treated group. Fertility and Sterility 2005 83, 1093-1099DOI: (10.1016/j.fertnstert.2004.12.013) Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions