Mishra Vivek, Saxena Daya Krishna, Das Mukul
Indian Institute of Toxicology Research, Council of Scientific and Industrial Research, Lucknow 226 001, India.
Toxicol Lett. 2009 Apr 25;186(2):104-10. doi: 10.1016/j.toxlet.2009.01.006. Epub 2009 Jan 16.
Several incidences of reduction in the fertility (sperm count) have been reported in India and worldwide as well. Adulteration of food and consumption of adulterated mustard oil with argemone oil (AO) are presumed to be the factors for reduction in sperm count. In the present study we have studied the exfoliation of germ cells from Sertoli cell, its viability after detachment, cytotoxicity and execution of apoptosis via mitochondrial pathway for different concentration of AO, argemone alkaloid (AA) and its major constituent sanguinarine (SA). A dose dependent increase in germ cell detachment and decrease in viability of detached germ cells were observed (P<0.05). A significant inhibition was observed via 3-(4,5-dimethylthiazol-2-yl)-2,5-dipehyl tetrazolium bromide (MTT) assay in the proliferative activity of germ cell and leakage of cytosolic enzyme was observed via Lactate dehydrogenase(LDH) assay (P<0.05). A time and dose dependent inhibition of mitochondrial membrane potential was observed (P<0.05). Treatment of Sertoli-germ cells with the lowest concentration of AO/AA and SA for 24h resulted in 5.2- , 4.4- and 3.6-fold increase in the percentage of early apoptotic cells, respectively. This increase was enhanced to 8.3, 4.75 and 5.81-fold, respectively at 48 h in detached germ cells undergoing early apoptosis. These results suggest that alterations in germ cell apoptosis by a disruption in contact mediated communication between the Sertoli cells and germ cells, may subsequently lead to testicular impairment.
在印度以及全球范围内,均有几例关于生育能力下降(精子数量减少)的报道。食品掺假以及食用掺有白屈菜籽油(AO)的掺假芥菜油被认为是精子数量减少的因素。在本研究中,我们针对不同浓度的AO、白屈菜生物碱(AA)及其主要成分血根碱(SA),研究了生殖细胞从支持细胞的脱落情况、脱落后的活力、细胞毒性以及通过线粒体途径引发的细胞凋亡。观察到生殖细胞脱落呈剂量依赖性增加,而脱落后生殖细胞的活力下降(P<0.05)。通过3-(4,5-二甲基噻唑-2-基)-2,5-二苯基溴化四氮唑(MTT)法观察到生殖细胞增殖活性受到显著抑制,通过乳酸脱氢酶(LDH)法观察到细胞溶质酶泄漏(P<0.05)。观察到线粒体膜电位呈时间和剂量依赖性抑制(P<0.05)。用最低浓度的AO/AA和SA处理支持细胞-生殖细胞24小时,分别导致早期凋亡细胞百分比增加5.2倍、4.4倍和3.6倍。在经历早期凋亡的脱落后生殖细胞中,48小时时这种增加分别增强到8.3倍、4.75倍和5.81倍。这些结果表明,支持细胞与生殖细胞之间接触介导的通讯中断导致生殖细胞凋亡改变,随后可能导致睾丸损伤。