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1、#262#中国职业医学2006年8月第33卷第4期ChinOccupMed,August,2006,Vo.l33,No.4文章编号:1000-6486(2006)04-0262-03调查与研究锌对镉致小鼠睾丸细胞凋亡及精细胞形态改变的保护作用11231姜声扬,庄勋,黄晓冬,何智敏,丁绍红摘要:目的研究亚急性镉中毒致雄性小鼠睾丸细胞凋亡和锌干预作用。方法50只成年健康ICR小鼠,随机分为对照组、低剂量组、中剂量组、高剂量组和锌干预组,分别以不同剂量氯化镉溶液(0、04、08、16、16mg/
2、kg)行背部-4皮下注射,锌干预组同时给予硫酸锌溶液(350!10g/L)作饮用水自由饮用,连续染毒3周。检测精子活力、畸变和睾丸细胞凋亡。结果各组小鼠病理损伤自中剂量组开始出现,以高剂量组明显,锌干预组病理损伤小于高剂量组;各染毒组睾丸细胞凋亡率高于对照组,随剂量增加,低、中剂量组的凋亡率逐渐增高,而高剂量组凋亡率低于中剂量组,锌干预组凋亡率高于高剂量组。精子成活率随染毒剂量的增加而逐渐下降、畸形率则增加,呈剂量∀反应关系;锌干预组精子成活率比高剂量组高,畸形率则显著降低。结论锌可降低镉中毒所致精子成活率下降和
3、精子畸变率增高,但增加镉中毒时睾丸细胞凋亡率。关键词:锌;镉;睾丸;脱噬作用;精细胞形态中图分类号:R1351文献标识码:ATheprotectiveeffectofzincsulphateonapoptosisoftesticlecellsandmalformationofsperminducedbycadmiuminmiceJIANGShengyang,ZHUANGXun,HUANGXiaodong,etal(SchoolofPublicHealth,NantongUniversity,Nant
4、ong226001,China)Abstract:ObjectiveTostudytheprotectiveeffectofzincsulphate(ZnSO4)onapoptosisoftesticlecellsandmalformationofsperminducedbycadmium(Cd)inmice.Methods50ICRmalemicewererandomlydividedinto3Cdexposuregroups,1zincprotectiveand1controlgroups.Themice
5、inCdgroupswereinjectedhypodermicallywithcadmiumchloride(CdCl2)atthedosesof0.4,0.8and1.6mg/kg(5d/w)for3weeks.ThemiceinZnprotectivegroupwerealsotreatedwith-41.6mg/kgCdCl2(5d/w,ip)for3weeks,atthesametime,theywerealsogivenZnSO4(3.50!10g/L)indrinkingwateradlibitum.At
6、theendoftheexposure,thecoefficientofviscerawasdetermined,theenergyandmalformationofspermwasobserved,andtheapoptosisoftesticlecellswasalsodetectedbyfluorescencestain.ResultsAlongwiththedosesofCdincreased,themalformationrateofspermalsoincreasedbuttheviabilityra
7、teofspermdecreased,bothofwhichwereshowninagooddoseresponserelationshipmanner.Atthesametime,increasedapoptosisratiooftesticlecellswasfoundinlowandmiddledosegroupsofCd,butinthehighdosegroupofCd,theapoptosisratiowaslowerthanthatofthemiddledosegroup.Ontheotherhand,
8、theviabilityrateofspermwasascendedandthemalformationrateofspermwasdescendedinZnprotectivegroupcomparedwiththerelatedCdexposuregroup.Italsorevealedthattheapoptosisrate