摘要
目的 探讨辅助性T细胞在小儿再生障碍性贫血(AA)发病中的表达机制及意义。方法 将
53例AA患儿按病情分为重型AA组(SAA组)21例、轻型AA组(MAA组)17例、缓解期AA组(CR组)
15例,另取非AA的血液系统疾病所导致的血小板减少或者贫血患儿(AL组)16例、健康小儿20例(NC组)
为对照。采用流式细胞仪检测各组外周静脉血中的CD+
4 、CD+
4 CD+
25、CD+
4 CD+
25CD127low、CD+
4 IFNγ+(Th1细
胞)、CD+
4 IL4+(Th2细胞),采用酶联免疫吸附法(ELISA)检测外周静脉血中转化生长因子β1(TGFβ1)、
γ干扰素(IFNγ)和白细胞介素4(IL4)水平。结果 SAA组外周静脉血中CD+
4 、CD+
4 CD+
25、CD+
4 CD+
25
CD127low、TGFβ1分别为(26.59±4.37)%、(3.44±0.29)%、(3.13±1.16)%、(14.59±3.10)ng/mL,MAA
组分别为(32.67±3.19)%、(5.42±0.28)%、(4.29±1.21)%、(22.98±3.38)ng/mL,CR组分别为(33.13±
3.24)%、(5.23±0.26)%、(4.36±1.33)%、(23.19±3.91)ng/mL,AL组分别为(37.98±4.01)%、(6.89±
0.28)%、(4.99±1.42)%、(34.46±5.23)ng/mL,NC组分别为(38.66±3.41)%、(7.01±0.38)%、(5.10±
1.52)%、(35.17±5.14)ng/mL,四组差异均有统计学意义(F=23.72、25.49、15.24、24.52,均P<0.05);SAA
组外周血中Th1、Th2、Th1/Th2水平分别为(13.04±3.01)%、(3.44±0.29)%、(1.99±1.17),MAA组分别
为(11.01±2.89)%、(6.28±2.99)%、(1.75±0.97),CR组分别为(10.38±3.27)%、(6.41±3.18)%、
(162±1.03),AL组分别为(8.03±3.42)%、(6.35±3.08)%、(1.26±1.11)、NC组分别为(8.41±
384)%、(6.23±3.44)%、(1.34±1.12),四组差异均有统计学意义(F=35.92、42.43、22.24,均P<0.05);
SAA组外周血中IFNγ和IL4水平分别为(13.04±2.58)pg/mL、(17.22±3.88)pg/mL,MAA组分别为
(1011±2.22)pg/mL、(17.24±4.21)pg/mL,CR组分别为(9.88±2.16)pg/mL、(17.01±4.00)pg/mL,AL组
分别为(8.01±1.68)pg/mL、(16.63±3.58)pg/mL,NC组分别为(38.66±3.41)pg/mL、(16.74±3.81)pg/mL,
四组差异均有统计意义(F=24.17、3.39,均P<0.05)。结论 Treg细胞减少,TGFβ1对Th1细胞和IFNγ
分泌的抑制程度降低,导致Th1/Th2向Th1偏移,进而导致造血骨髓衰竭可能是小儿患有AA的发病机制之一。
Objective ToinvestigatetheexpressionmechanismandsignificaneofhelperTcellsinchildren
withaplasticanemia(AA).Methods 53childrenofAAweredividedintoheavyAAgroup(SAAgroup,21cases),
lightAAgroup(MAAgroup,17cases),Aaremissiongroup(Crgroup,15cases)bythedisease,theothertakenthe
non-aplasticanemiabloodplateletdisorderscausedbyreducedoranemiainchildren(Algroup)of16cases,
20healthychildrenwereselectedastheNCgroup.TheperipheralbloodCD+
4 ,CD+
4 CD+
25,CD+
4 CD+
25CD127low,
CD+
4 IFN-γ(Th1cells),CD+
4 IL-4+(Th2cells)ineachgroupweredetectedbyflowcytometry.ELISAtestwas
usedtodetectperipheralbloodlevelsoftransforminggrowthfactor-β(TGF-β),interferon-γ(IFN-γ)and
interleukin-4(IL-4).Results TheperipheralbloodCD+
4 ,CD+
4 CD+
25,CD+
4 CD+
25CD127low,TGF-beta1levelsin
theSAAgroupwere(26.59±4.37)%,(3.44±0.29)%,(3.13±1.16)%,(14.59±3.10)ng/mL,respectively,
whichintheMAAgroupwere(32.67±3.19)%,(5.42±0.28)%,(4.29±1.21)%,(22.98±3.38)ng/mL,
respectively,whichintheCRgroupwere(33.13±3.24)%,(5.23±0.26)%,(4.36±1.33)%,(23.19±
3.91)ng/mL,respectively,whichintheALgroupwere(37.98±4.01)%,(6.89±0.28)%,(4.99±1.42)%,
(34.46±5.23)ng/mL,respectively,whichintheNCgroupwere(38.66±3.41)%,(7.01±0.38)%,(5.10±1.52)%,
(35.17±5.14)ng/mL,respectively,thedifferencesamongthefourgroupswerestatisticallysignificant(F=23.72,
25.49,15.24,24.52,allP〈0.05).PeripheralbloodTh1,Th2andTh1/Th2levelsintheSAAgroupwere(13.04±
中国基层医药2017年12月第24卷第24期 ChinJPrimMedPharm,December2017,Vol.24,No.24
3.01)%,(3.44±0.29)%,(1.99±1.17),respectively,whichintheMAAgroupwere(11.01±2.89)%,(6.28±
299)%,(1.75±0.97),respectively,whichintheCRgroupwere(10.38±3.27)%,(6.41±3.18)%,(1.62±
1.03),respectively,whichintheALgroupwere(8.033±.42)%,(6.35±3.08)%,(1.26±1.11),respectively,
whichintheNCgroupwere(8.41±3.84)%,(6.23±3.44)%,(1.34±1.12),thedifferencesamongthefour
groupswerestatisticallysignificant(F=35.92,42.43,22.24,allP〈0.05).PeripheralbloodIFN-gammaandIL-4
levelsinSAAgroupwere(13.04±2.58)pg/mL,(17.22±3.88)pg/mL,respectively,whichinMAAgroupwere
(10.11±2.22)pg/mL,(17.24±4.21)pg/mL,respectively,whichintheCRgroupwere(9.88±2.16)pg/mL,
(17.01±4.00)pg/mL,respectively,whichintheALgroupwere(8.01±1.68)pg/mL,(16.63±3.58)pg/mL,
respectively,whichintheNCgroupwere(38.66±3.41)pg/mL,(16.743±.81)pg/mL,thedifferencesamongthe
fourgroupswerestatisticallysignificant(F=24.17,3.39,allP〈0.05).Conclusion Tregcellsdecreased,the
inhibitionextentofTGF-β1onTh1cellsandIFN-γsecretiondecreased,whichleadingtoTh1/Th2shiftedtoTh1,
leadingtohematopoieticmarrowfailuremaybeoneofthepathogenesisofchildrensufferredfromAA.
出处
《中国基层医药》
CAS
2017年第24期3798-3802,共5页
Chinese Journal of Primary Medicine and Pharmacy