中华肾脏病杂志
中華腎髒病雜誌
중화신장병잡지
2014年
10期
777-783
,共7页
宋志霞%郭银凤%周敏%张晓良
宋誌霞%郭銀鳳%週敏%張曉良
송지하%곽은봉%주민%장효량
骨化三醇%糖尿病肾病%足细胞%PI3K/p-Akt信号通路
骨化三醇%糖尿病腎病%足細胞%PI3K/p-Akt信號通路
골화삼순%당뇨병신병%족세포%PI3K/p-Akt신호통로
Calcitriol%Diabetic nephropathy%Podocytes%PI3K/p-Akt signaling pathway
目的 探讨活性维生素D对糖尿病肾病大鼠足细胞损伤的抑制作用及其可能机制.方法 将SD雄性大鼠随机分为四组:对照组(NC组)、活性维生素D组(VD组,骨化三醇0.1 μg· kg-1·d-1灌胃)、糖尿病肾病组(DN组,腹腔注射STZ 58 mg/kg)、糖尿病肾病+活性维生素D组(DN+VD组).定期检测血糖、体质量,收集尿标本,18周末处死动物,检测Scr、BUN和尿蛋白变化.PAS及MASSON染色观察肾脏病理改变.电镜观察足细胞超微结构变化.免疫组化法检测肾组织Nephrin、Podocin、Desmin及VDR的表达.Western印迹检测Podocin、Nephrin、Desmin、VDR、PI3K-p85、Akt及p-Akt表达.结果 与DN组比,DN+VD组蛋白尿减低达36%,肾脏病理损伤减轻,足细胞损伤减轻,血糖、体质量以及血尿素氮无差异(均P> 0.05).血肌酐、钙、磷在四组之间未见差异(均P> 0.05).与NC组比较,DN组Podocin、Nephrin,VDR,PI3K-p85和p-Akt表达量均明显减低(均P<0.05),足细胞损伤标志Desmin蛋白表达量显著增加(均P< 0.05).与DN组比,DN+VD组Podocin、Nephrin,VDR,PI3K-p85和p-Akt表达量明显增加(均P< 0.05),Desmin蛋白表达量明显减低(P<0.05).相关性分析显示,Nephrin与VDR呈正相关(r=0.776,P<0.05),与PI3K-p85及p-Akt也呈明显的正相关(r=0.736,r=0.855,均P<0.05).结论 活性维生素D能够显著抑制STZ诱导的糖尿病肾病大鼠足细胞损伤,其分子机制可能与PI3K/p-Akt信号通路有关.
目的 探討活性維生素D對糖尿病腎病大鼠足細胞損傷的抑製作用及其可能機製.方法 將SD雄性大鼠隨機分為四組:對照組(NC組)、活性維生素D組(VD組,骨化三醇0.1 μg· kg-1·d-1灌胃)、糖尿病腎病組(DN組,腹腔註射STZ 58 mg/kg)、糖尿病腎病+活性維生素D組(DN+VD組).定期檢測血糖、體質量,收集尿標本,18週末處死動物,檢測Scr、BUN和尿蛋白變化.PAS及MASSON染色觀察腎髒病理改變.電鏡觀察足細胞超微結構變化.免疫組化法檢測腎組織Nephrin、Podocin、Desmin及VDR的錶達.Western印跡檢測Podocin、Nephrin、Desmin、VDR、PI3K-p85、Akt及p-Akt錶達.結果 與DN組比,DN+VD組蛋白尿減低達36%,腎髒病理損傷減輕,足細胞損傷減輕,血糖、體質量以及血尿素氮無差異(均P> 0.05).血肌酐、鈣、燐在四組之間未見差異(均P> 0.05).與NC組比較,DN組Podocin、Nephrin,VDR,PI3K-p85和p-Akt錶達量均明顯減低(均P<0.05),足細胞損傷標誌Desmin蛋白錶達量顯著增加(均P< 0.05).與DN組比,DN+VD組Podocin、Nephrin,VDR,PI3K-p85和p-Akt錶達量明顯增加(均P< 0.05),Desmin蛋白錶達量明顯減低(P<0.05).相關性分析顯示,Nephrin與VDR呈正相關(r=0.776,P<0.05),與PI3K-p85及p-Akt也呈明顯的正相關(r=0.736,r=0.855,均P<0.05).結論 活性維生素D能夠顯著抑製STZ誘導的糖尿病腎病大鼠足細胞損傷,其分子機製可能與PI3K/p-Akt信號通路有關.
목적 탐토활성유생소D대당뇨병신병대서족세포손상적억제작용급기가능궤제.방법 장SD웅성대서수궤분위사조:대조조(NC조)、활성유생소D조(VD조,골화삼순0.1 μg· kg-1·d-1관위)、당뇨병신병조(DN조,복강주사STZ 58 mg/kg)、당뇨병신병+활성유생소D조(DN+VD조).정기검측혈당、체질량,수집뇨표본,18주말처사동물,검측Scr、BUN화뇨단백변화.PAS급MASSON염색관찰신장병리개변.전경관찰족세포초미결구변화.면역조화법검측신조직Nephrin、Podocin、Desmin급VDR적표체.Western인적검측Podocin、Nephrin、Desmin、VDR、PI3K-p85、Akt급p-Akt표체.결과 여DN조비,DN+VD조단백뇨감저체36%,신장병리손상감경,족세포손상감경,혈당、체질량이급혈뇨소담무차이(균P> 0.05).혈기항、개、린재사조지간미견차이(균P> 0.05).여NC조비교,DN조Podocin、Nephrin,VDR,PI3K-p85화p-Akt표체량균명현감저(균P<0.05),족세포손상표지Desmin단백표체량현저증가(균P< 0.05).여DN조비,DN+VD조Podocin、Nephrin,VDR,PI3K-p85화p-Akt표체량명현증가(균P< 0.05),Desmin단백표체량명현감저(P<0.05).상관성분석현시,Nephrin여VDR정정상관(r=0.776,P<0.05),여PI3K-p85급p-Akt야정명현적정상관(r=0.736,r=0.855,균P<0.05).결론 활성유생소D능구현저억제STZ유도적당뇨병신병대서족세포손상,기분자궤제가능여PI3K/p-Akt신호통로유관.
Objective To investigate the effects and underlying mechanism of calcitriol on ameliorating podocytes impairment in DN rats.Methods SD rats were randomly divided into four groups:normal control (NC) group,calcitriol treatment (VD) group:calcitriol 0.1μg· kg--1 d-1,diabetic nephropathy (DN) group:streptozocin (STZ) 58 mg/kg,DN treated with calcitriol (DN + VD) group:calcitriol 0.1 μg · kg-1 · d-1 + STZ 58 mg/kg.Rats were sacrificed at the end of 18 weeks.Results Compared with the DN group,the DN + VD group exhibited significantly lower proteinuria by 36%,improved renal histology at the end of the experiment (P < 0.05),and similar levels of blood glucose,serum urea nitrogen as well as body weight (P > 0.05).There were no significant differences in the serum concentrations of creatinine,calcium and phosphorus among the four groups (P > 0.05).In DN group,the expressions of nephrin,podocin,VDR,PI3K-p85 and p-Akt were significantly decreased and the expression of desmin was increased compared to NC group.Calcitriol treatment could attenuate the above changes.Additionally,a positive correlation was observed between the expressions of nephrin and VDR (r=0.776,P < 0.05).Likewise,the expression of nephrin was positively correlated with either PI3K -p85 or p-Akt (r=-0.736,r=0.855,all P < 0.05).Conclusion Calcitriol can ameliorate podocytes injury in DN rats,which might be related with the further up-regulation of PI3K/p-Akt signaling pathway.