Chinese Medical E-ournals Database

Chinese Journal of Obstetrics & Gynecology and Pediatrics(Electronic Edition) ›› 2019, Vol. 15 ›› Issue (03): 283 -291. doi: 10.3877/cma.j.issn.1673-5250.2019.03.008

Special Issue:

Original Article

Screening of bronchopulmonary dysplasia susceptibility genes in preterm infants of Zhuang nationality

Yan Li1, Qiufen Wei1, Xiaofang Guo1, Qi Yang2, Xinnian Pan1,(), Danhua Meng1, Wei Tan1   

  1. 1. Department of Neonatology, Maternal & Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530003, Guangxi Zhuang Autonomous Region, China
    2. Genetics and Metabolism Center, Maternal & Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530003, Guangxi Zhuang Autonomous Region, China
  • Received:2018-10-12 Revised:2019-03-13 Published:2019-06-01
  • Corresponding author: Xinnian Pan
  • About author:
    Corresponding author: Pan Xinnian, Email:
  • Supported by:
    Health and Family Planning Commission Self-financing Research Project of Guangxi Zhuang Autonomous Region(Z2016085, Z20170787, Z20170788); Yu Miao Plan Project of Maternal & Child Health Hospital of Guangxi Zhuang Autonomous Region(GXWCH-YMJH-2017003)
Objective

To investigate possible susceptibility genes of bronchopulmonary dysplasia (BPD) and their features in preterm infants of Zhuang nationality in Guangxi Zhuang Autonomous Region.

Methods

A total of 50 preterm infants (Zhuang nationality) with gestational age≤ 32 weeks and birth weight ≤ 1 500 g who were treated in Maternal & Child Health Hospital of Guangxi Zhuang Autonomous Region from January 2016 to January 2018, were enrolled into this study. According to whether preterm infants diagnosed as BPD during hospital stay, they were divided into BPD group (n=36, BPD preterm infants) and control group (n=14, non-BPD preterm infants). Peripheral venous blood samples with 2 mL were sampled from all preterm infants within 12 h after admission to perform Sanger gene sequencing. Twenty-four BPD related susceptible candidate genes were selected base on domestic and foreign literatures. Firstly, Hardy-Weinberg equilibrium test was performed to select BPD related susceptibility genes with hereditary stability in preterm infants of Zhuang nationality in this study. Then, the genotype distribution differences of selected BPD related susceptibility genes in preterm infants of Zhuang nationality under different conditions were compared using chi-square test to select susceptibility genes related to BPD occurrence and its severity degree in preterm infants of Zhuang nationality. Finally, to analyze the association between susceptibility genes and occurrence of BPD, the differences of genotype distribution and allele frequency (AF) of BPD susceptibility genes were compared between two groups using chi-square test. This study was in line with the requirements of World Medical Association Declaration of Helsinki revised in 2013, and informed contents were obtained from all guardians of preterm infants.

Results

① Among 24 BPD related susceptibility genetic loci in preterm infants of Zhuang nationality, the genotype distribution of 17 genes consistent with Hardy-Weinberg equilibrium (P>0.05), which had population representation in preterm infants of this study, and were chosen as candidate genes. ② Among these 17 analyzed genes, the genetic polymorphism of vascular endothelial growth factor (VEGF)-2578 and toll-like receptors (TLR)-5 genes may associated with the occurrence of BPD in preterm infants of Zhuang nationality (P<0.05), no genetic locus was found to associated with the severity of BPD (P>0.05). ③ There were significant differences between two groups in genotype distribution and AF of VEGF-2578 or TLR-5 genetic locus (VEGF-2578 genetic locus: χ2=0.350, P=0.030; χ2=9.040, P=0.003. TLR-5 genetic locus: χ2=0.378, P=0.016; χ2=8.268, P=0.004). In BPD group, CC genotype proportion in all genotypes of VEGF-2578 genetic locus and TT genotype proportion in all genotypes of TLR-5 genetic locus were significantly higher than those of control group (80.6% vs 42.9%, 83.3% vs 42.9%); and the AF of C allele of VEGF-2578 genetic locus and AF of T allele of TLR-5 genetic locus were significantly higher than those of control group (87.5% vs 60.7%, 88.9% vs 64.3%).

Conclusions

The genetic loci polymorphisms of VEGF-2578 and TLR-5 genes might be associated with the occurrence of BPD in preterm infants of Zhuang nationality. The CC genotype of VEGF-2578 genetic locus and TT genotype of TLR-5 genetic locus might be the susceptible genotype of BPD in preterm infants of Zhuang nationality. The carrier of C allele of VEFG-2578 gene or T allele of TLR-5 gene of Zhuang nationality might at higher risk of BPD.

表1 与壮族早产儿支气管肺发育不良可能相关的24个候选易感基因位点扩增引物序列
序号 基因位点 正向引物 反向引物
1 SPOCK2(rs1245560) 5′-GCAGGACAGTCTTTGGGTTG-3′ 5′-AGGCAGCTTAGAGACCACTG-3′
2 SPA1-AA19(rs1059047) 5′-ACTCCATGACTGACCACCTT-3′ 5′-ACTCACAGATGGTCAGTCGG-3′
3 SPA1-AA50(rs1136450) 5′-ACGTTGGATGCAGATGGGCCTCCTGAAAAG-3′ 5′-ACGTTGGATGTGCGAAGTGAAGGACGTTTG-3′
4 SPA1-AA62(rs833061) 5′-ACGTTGGATGAATCCTGGAGTGACCCCTG-3′ 5′-ACGTTGGATGAGTGAGGACGTGTGTGTCTG-3′
5 SPA1-AA133(rs1059057) 5′-ACGTTGGATGAGAGACAAAGTGGTCAGTGG-3′ 5′-ACGTTGGATGGATTCCTTGGGACAGCAATG-3′
6 SPA1-AA219(rs4253527) 5′-ACGTTGGATGGAACTCACAGATGGTCAGTC-3′ 5′-ACGTTGGATGAGACTTCCGCTACTCAGACG-3′
7 SPB18(rs2077079) 5′-GACAAACACTGAGGTCGCTG-3′ 5′-CTCAGTGAGTGGTGGAGCTG-3′
8 SPB1013(rs3024798) 5′-ACGTTGGATGCTAAGAGAACCTCCCCATTG-3′ 5′-ACGTTGGATGACTCTTGGCATAGGTCATCC-3′
9 SPB1580(rs1130866) 5′-CATGATGCCAGGTGTGTAGC-3′ 5′-TTTGTGTCTGGCCGGCTT-3′
10 SPB9306(rs7316) 5′-GGCAAGCTTTCTTCCTCGAG-3′ 5′-TCGGCCTTCTGAGTAGTTGG-3′
11 VEGF-460(rs833061) 5′-TGGAGCGAGCAGCGTCTTCG-3′ 5′-CAGGGCCTGAGAGCCGTTCC-3′
12 VEGF-2578(rs699947) 5′-GGATGGGGCTGACTAGGTAAGC-3′ 5′-AGCCCCCTTTTCCTCCAAC-3′
13 VEGF+405(rs2010963) 5′-TGCCATTCCCCACTTGAATC-3′ 5′-GAAGCGAGAACAGCCCAGAA-3′
14 DAG1-N494H(rs1457319153) 5′-CCTCACCGCCTACTCGTATT -3′ 5′- GCAGTTTCAGGGTCAGCTTC -3′
15 TNFα(rs1799724) 5′-GTATGGGGACCCCCCCTTAA-3′ 5′-GACCCGGAGACTCATAATGC-3′
16 TLR-4(rs4986790) 5′-TGTATTCAAGGTCTGGCTGGT-3′ 5′-GCATTCCCACCTTTGTTGGA-3′
17 TLR-5(rs5744168) 5′-ACGGACTTGACAACCTCCAA-3′ 5′-TCTGGAGATGAGGTACCCGT-3′
18 TLR-10(rs11096955) 5′-GGTAAGGCTTATCTTGACCACA-3′ 5′-GACGAGTTGTTTAAAAGGACT-3′
19 MIF-173(rs755622) 5′-ACTAAGAAAGACCCGAGG-3′ 5′-GGGGCACGTTGGTGTTTAC-3′
20 TIRAP-2054(rs8177374) 5′-CAAGTACCAGATGCTGCAGG-3′ 5′-CCGACAGCCTTTTCCAGAAG-3′
21 IL-18RAP(rs3771150) 5′-GGGGCCCATCTTAAGCTGAT-3′ 5′-TGTTGCTCTGAGACCACGAT-3′
22 IL-18R1(rs3771171) 5′-ACGGGTAGTAGAGAATACAGCC-3′ 5′-TCTTCTATGCTCCTGGGTGTC-3′
23 MMP16C/T(rs2664352) 5′-TTCCTCCCCTGAACTCCAAC-3′ 5′-TGGAGAGTGTCTGGGGAAAC-3′
24 MMP16A/G(rs2664349) 5′-AACAGGAAAGGGAGGTGAGG-3′ 5′-ACAAAAGCCCTTCCCATTGC-3′
表2 2组壮族早产儿一般临床资料比较
表3 符合Hardy-Weinberg平衡定律的与壮族早产儿支气管肺发育不良可能相关的17对等位基因的Hardy-Weinberg平衡检验结果
表4 与壮族早产儿支气管肺发育不良发生有关的候选基因筛选结果[例数(%)]
发生BPD 例数 SPA1-AA50基因基因型分布 SPA1-AA133基因基因型分布 SPB18基因基因型分布
CC CG GG AA AG GG AA AC CC
36 17(47.2) 13(36.1) 6(16.7) 16(44.5) 12(33.3) 8(22.2) 14(38.9) 13(36.1) 9(25.0)
14 7(50.0) 5(35.7) 2(14.3) 6(42.8) 4(28.6) 4(28.6) 5(35.7) 6(42.9) 3(21.4)
χ2 ? 0.032 0.070 0.063
P ? 0.974 0.884 0.904
发生BPD 例数 SPB1580基因基因型分布 SPB9306基因基因型分布 VEGF-2578基因基因型分布
CC CG GG AA AG GG CC AC AA
36 13(36.1) 12(33.3) 11(30.6) 12(33.3) 15(41.7) 9(25.0) 29(80.6) 5(13.8) 2(5.6)
14 5(35.7) 6(42.9) 3(21.4) 6(42.9) 5(35.7) 3(21.4) 6(42.9) 5(35.7) 3(21.4)
χ2 ? 0.105 0.089 0.350
P ? 0.758 0.820 0.030
发生BPD 例数 VEGF+405基因基因型分布 DAG1-N494H基因基因型分布 TNFα基因基因型分布
CC CG GG AA AG GG CC CT TT
36 19(52.8) 12(33.3) 5(13.9) 20(55.6) 12(33.3) 4(11.1) 16(44.4) 9(25.0) 11(30.6)
14 7(50.0) 3(21.4) 4(28.6) 7(50.0) 2(14.3) 5(35.7) 4(28.6) 6(42.8) 4(28.6)
χ2 ? 0.181 0.295 0.182
P ? 0.428 0.093 0.423
发生BPD 例数 TLR-4基因基因型分布 TLR-5基因基因型分布 TLR-10基因基因型分布
AA AG GG CC CT TT AA AC CC
36 22(61.1) 10(27.8) 4(11.1) 2(5.6) 4(11.1) 30(83.3) 21(58.3) 8(22.2) 7(19.5)
14 6(42.9) 3(21.4) 5(35.7) 2(14.2) 6(42.9) 6(42.9) 7(50.0) 4(28.6) 3(21.4)
χ2 ? 0.277 0.378 0.079
P ? 0.126 0.016 0.855
发生BPD 例数 TIRAP-2054基因基因型分布 IL-18RAP基因基因型分布 IL-18R1基因基因型分布
CC CT TT CC CT TT AA AG GG
36 20(55.6) 12(33.3) 4(11.1) 15(41.7) 14(38.9) 7(19.4) 23(63.9) 9(25.0) 4(11.1)
14 8(57.1) 2(14.3) 4(28.6) 5(35.7) 6(42.9) 3(21.4) 7(50.0) 5(35.7) 2(14.3)
χ2 ? 0.246 0.054 0.127
P ? 0.199 0.928 0.663
发生BPD 例数 MMP16C/T基因基因型分布 MMP16A/G基因基因型分布
CC CT TT AA AG GG
36 17(47.2) 12(33.3) 7(19.5) 24(66.7) 7(19.4) 5(13.9)
14 5(35.7) 6(42.9) 3(21.4) 7(50.0) 3(21.4) 4(28.6)
χ2 ? 0.107 0.180
P ? 0.749 0.432
表5 与壮族早产儿支气管肺发育不良严重程度有关的候选基因筛选结果[例数(%)]
BPD严重程度 例数 SPA1-AA50基因基因型分布 SPA1-AA133基因基因型分布 SPB18基因基因型分布
CC CG GG AA AG GG AA AC CC
轻度 20 9(45.0) 6(30.0) 5(25.0) 8(40.0) 7(35.0) 5(25.0) 6(30.0) 7(35.0) 7(35.0)
中度 10 5(50.0) 5(50.0) 0(0) 6(60.0) 4(40.0) 0(0) 5(50.0) 4(40.0) 1(10.0)
重度 6 3(50.0) 2(33.3) 1(16.7) 2(33.3) 1(16.7) 3(50.0) 3(50.0) 2(33.3) 1(16.7)
χ2 ? 0.290 0.373 0.271
P ? 0.509 0.213 0.585
BPD严重程度 例数 SPB1580基因基因型分布 SPB9306基因基因型分布 VEGF-2578基因基因型分布
CC CG GG AA AG GG CC AC AA
轻度 20 6(30.0) 6(30.0) 8(40.0) 5(25.0) 7(35.0) 8(40.0) 1(5.0) 3(15.0) 16(80.0)
中度 10 5(50.0) 3(30.0) 2(20.0) 4(40.0) 5(50.0) 1(10.0) 1(10.0) 1(10.0) 8(80.0)
重度 6 2(33.3) 3(50.0) 1(16.7) 3(50.0) 3(50.0) 0(0) 0(0) 1(16.7) 5(83.3)
χ2 ? 0.263 0.371 0.153
P ? 0.613 0.220 0.929
BPD严重程度 例数 VEGF+405基因基因型分布 DAG1-N494H基因基因型分布 TNFα基因基因型分布
CC CG GG AA AG GG CC CT TT
轻度 20 10(50.0) 8(40.0) 2(10.0) 12(60.0) 6(30.0) 2(10.0) 9(45.0) 5(25.0) 6(30.0)
中度 10 5(50.0) 3(30.0) 2(20.0) 5(50.0) 3(30.0) 2(20.0) 4(40.0) 2(20.0) 4(40.0)
重度 6 4(66.6) 1(16.7) 1(16.7) 3(50.0) 3(50.0) 0(0) 3(50.0) 2(33.3) 1(16.7)
χ2 ? 0.205 0.238 0.167
P ? 0.812 0.706 0.906
BPD严重程度 例数 TLR-4基因基因型分布 TLR-5基因基因型分布 TLR-10基因基因型分布
AA AG GG CC CT TT AA AC CC
轻度 20 11(55.0) 5(25.0) 4(20.0) 1(5.0) 1(5.0) 18(90.0) 13(65.0) 4(20.0) 3(15.0)
中度 10 7(70.0) 3(30.0) 0(0) 1(10.0) 2(20.0) 7(70.0) 5(50.0) 3(30.0) 2(20.0)
重度 6 4(66.7) 2(33.3) 0(0) 0(0) 1(16.7) 5(83.3) 3(50.0) 1(16.7) 2(33.3)
χ2 ? 0.302 0.258 0.203
P ? 0.460 0.632 0.819
BPD严重程度 例数 TIRAP-2054基因基因型分布 IL-18RAP基因基因型分布 IL-18R1基因基因型分布
CC CT TT CC CT TT AA AG GG
轻度 20 11(55.0) 6(30.0) 3(15.0) 6(30.0) 9(45.0) 5(25.0) 13(65.0) 5(25.0) 2(10.0)
中度 10 6(60.0) 3(30.0) 1(10.0) 5(50.0) 3(30.0) 2(20.0) 7(70.0) 2(20.0) 1(10.0)
重度 6 3(50.0) 3(50.0) 0(0) 4(66.7) 2(33.3) 0(0) 3(50.0) 2(33.3) 1(16.7)
χ2 ? 0.208 0.303 0.139
P ? 0.805 0.456 0.950
BPD严重程度 例数 MMP16C/T基因基因型分布 MMP16A/G基因基因型分布
CC CT TT AA AG GG
轻度 20 9(45.0) 5(25.0) 6(30.0) 14(70.0) 3(15.0) 3(15.0)
中度 10 5(50.0) 4(40.0) 1(10.0) 7(70.0) 2(20.0) 1(10.0)
重度 6 3(50.0) 3(50.0) 0(0) 3(50.0) 2(33.3) 1(16.7)
χ2 ? 0.311 0.184
P ? 0.424 0.868
表6 2组早产儿VEGF-2578及TLR-5位点基因型分布及等位基因频率比较
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