中华微生物学和免疫学杂志
中華微生物學和免疫學雜誌
중화미생물학화면역학잡지
CHINESE JOURNAL OF MICROBIOLOGY AND IMMUNOLOGY
2014年
11期
817-824
,共8页
周厚福%李成荣%廖建湘%王国兵%林素芳%陈黎
週厚福%李成榮%廖建湘%王國兵%林素芳%陳黎
주후복%리성영%료건상%왕국병%림소방%진려
生酮饮食%雷帕霉素靶蛋白%B细胞%滤泡辅助性T细胞%IL-21%Bcl-6%Blimp-1
生酮飲食%雷帕黴素靶蛋白%B細胞%濾泡輔助性T細胞%IL-21%Bcl-6%Blimp-1
생동음식%뢰파매소파단백%B세포%려포보조성T세포%IL-21%Bcl-6%Blimp-1
Ketogenic diet%Mammalian target of rapamycin%B-lymphocytes%Follicular helper T cells%IL-21%Bcl-6%Blimp-1
目的:探讨生酮饮食( KD )导致低丙种球蛋白血症的可能机制。方法难治性癫痫( IP)患儿36例,正常同龄对照17例,分别于KD治疗前后直接取血备检。流式细胞术检测外周血滤泡辅助性T细胞( Tfh)、各阶段B细胞比例,ELISA检测外周血IL-21浓度,实时荧光定量PCR检测外周血CD4+T细胞雷帕霉素靶蛋白( mTOR )、Blimp-1、Bcl-6和IL-21 mRNA表达及测定CD19细胞mTOR mRNA表达。结果(1)IP患儿Tfh细胞数量在KD治疗后明显下降(P<0.05),IP患儿治疗前Tfh细胞比例与正常对照组无明显差异(P>0.05)。(2)IP患儿KD治疗后Tfh细胞转录因子Bcl-6表达显著下降(P<0.05),抑制因子Blimp-1表达增高(P<0.05)。(3)KD治疗后IP患儿IL-21血浓度呈下降趋势,CD4+T细胞IL-21 mRNA表达显著下降(P<0.05)。(4)KD治疗前后CD27-IgD+B细胞无显著差异(P>0.05),CD27+IgD+B细胞和CD27-IgD-B细胞呈下降趋势,CD27+IgD-B细胞和CD27+IgD-CD38highB细胞治疗后明显下降(P<0.05),Tfh细胞比例与CD27+IgD-转化后记忆B细胞和CD27+IgD-CD38high浆细胞数量呈正相关(r分别为0.644和0.609,P<0.05)。(5)IP患儿KD治疗后CD4+T细胞mTOR mRNA表达显著下降(P<0.05),mTOR表达与Tfh比例呈正相关(r=0.691,P<0.05),mTOR表达与CD27+IgD-转化后记忆B细胞和CD27+IgD-CD38high浆细胞数量呈正相关(r分别为0.715和0.650,P<0.05)。结论 KD可通过抑制CD4+T细胞及B细胞mTOR表达下调Tfh细胞数量及功能,抑制B细胞分化,这可能是少数患儿长期KD治疗导致低丙种球蛋白血症的原因之一。
目的:探討生酮飲食( KD )導緻低丙種毬蛋白血癥的可能機製。方法難治性癲癇( IP)患兒36例,正常同齡對照17例,分彆于KD治療前後直接取血備檢。流式細胞術檢測外週血濾泡輔助性T細胞( Tfh)、各階段B細胞比例,ELISA檢測外週血IL-21濃度,實時熒光定量PCR檢測外週血CD4+T細胞雷帕黴素靶蛋白( mTOR )、Blimp-1、Bcl-6和IL-21 mRNA錶達及測定CD19細胞mTOR mRNA錶達。結果(1)IP患兒Tfh細胞數量在KD治療後明顯下降(P<0.05),IP患兒治療前Tfh細胞比例與正常對照組無明顯差異(P>0.05)。(2)IP患兒KD治療後Tfh細胞轉錄因子Bcl-6錶達顯著下降(P<0.05),抑製因子Blimp-1錶達增高(P<0.05)。(3)KD治療後IP患兒IL-21血濃度呈下降趨勢,CD4+T細胞IL-21 mRNA錶達顯著下降(P<0.05)。(4)KD治療前後CD27-IgD+B細胞無顯著差異(P>0.05),CD27+IgD+B細胞和CD27-IgD-B細胞呈下降趨勢,CD27+IgD-B細胞和CD27+IgD-CD38highB細胞治療後明顯下降(P<0.05),Tfh細胞比例與CD27+IgD-轉化後記憶B細胞和CD27+IgD-CD38high漿細胞數量呈正相關(r分彆為0.644和0.609,P<0.05)。(5)IP患兒KD治療後CD4+T細胞mTOR mRNA錶達顯著下降(P<0.05),mTOR錶達與Tfh比例呈正相關(r=0.691,P<0.05),mTOR錶達與CD27+IgD-轉化後記憶B細胞和CD27+IgD-CD38high漿細胞數量呈正相關(r分彆為0.715和0.650,P<0.05)。結論 KD可通過抑製CD4+T細胞及B細胞mTOR錶達下調Tfh細胞數量及功能,抑製B細胞分化,這可能是少數患兒長期KD治療導緻低丙種毬蛋白血癥的原因之一。
목적:탐토생동음식( KD )도치저병충구단백혈증적가능궤제。방법난치성전간( IP)환인36례,정상동령대조17례,분별우KD치료전후직접취혈비검。류식세포술검측외주혈려포보조성T세포( Tfh)、각계단B세포비례,ELISA검측외주혈IL-21농도,실시형광정량PCR검측외주혈CD4+T세포뢰파매소파단백( mTOR )、Blimp-1、Bcl-6화IL-21 mRNA표체급측정CD19세포mTOR mRNA표체。결과(1)IP환인Tfh세포수량재KD치료후명현하강(P<0.05),IP환인치료전Tfh세포비례여정상대조조무명현차이(P>0.05)。(2)IP환인KD치료후Tfh세포전록인자Bcl-6표체현저하강(P<0.05),억제인자Blimp-1표체증고(P<0.05)。(3)KD치료후IP환인IL-21혈농도정하강추세,CD4+T세포IL-21 mRNA표체현저하강(P<0.05)。(4)KD치료전후CD27-IgD+B세포무현저차이(P>0.05),CD27+IgD+B세포화CD27-IgD-B세포정하강추세,CD27+IgD-B세포화CD27+IgD-CD38highB세포치료후명현하강(P<0.05),Tfh세포비례여CD27+IgD-전화후기억B세포화CD27+IgD-CD38high장세포수량정정상관(r분별위0.644화0.609,P<0.05)。(5)IP환인KD치료후CD4+T세포mTOR mRNA표체현저하강(P<0.05),mTOR표체여Tfh비례정정상관(r=0.691,P<0.05),mTOR표체여CD27+IgD-전화후기억B세포화CD27+IgD-CD38high장세포수량정정상관(r분별위0.715화0.650,P<0.05)。결론 KD가통과억제CD4+T세포급B세포mTOR표체하조Tfh세포수량급공능,억제B세포분화,저가능시소수환인장기KD치료도치저병충구단백혈증적원인지일。
Objective To investigate the possible mechanism of hypogammaglobuinemia caused by ketongenic diet (KD).Methods Thirty-six children with intractable epilepsy (IP) and seventeen age-matched healthy children were recruited in this study.The percentages of B cells at various stages of devel-opment and follicular helper T ( Tfh) cells were detected by flow cytometry.The plasma concentrations of IL-21 were determined by ELISA.Real-time quantitative PCR was performed to detect the expression of mam-malian target of rapamycin ( mTOR) , Blimp-1, Bcl-6 and IL-21 at mRNA level in CD4+T cells.Results mTOR at mRNA level was significantly down-regulated after KD treatment (P<0.05).The numbers of Tfh cells were positively correlated with the transcriptional level of mTOR (r=-0.691, P<0.05).Conclusion KD treatment might down-regulate Tfh and B cells through suppressing the expression of mTOR at mRNA level, suggesting a possible mechanism of hypogammaglobuinemia induced by KD treatment.