Objective:?Although several NPHS2 gene mutations and polymorphisms were described and?associated with clinical manifestation of steroid-resistant nephrotic syndrome (SRNS),?the?occurrence of these genetic abnormalitie...Objective:?Although several NPHS2 gene mutations and polymorphisms were described and?associated with clinical manifestation of steroid-resistant nephrotic syndrome (SRNS),?the?occurrence of these genetic abnormalities or variants appeared?to be influenced by race and ethnic group. We have investigated?probable mutations and variants in NPHS2 gene involved in SRNS and their association with clinical manifestations. Methods: We examined 28 children?with primary SRNS?whovisited?the pediatric nephrology division of 10 teaching hospitals in Indonesia. Molecular genetic studies of the NPHS2 gene were?conducted through screenings?for the exon 1, exon 2, and exon 8. The mutational analysis of NPHS2 was performed by DNA sequencing.?Fisher’s Exact Test was used to determine?the?correlation?between?NPHS2 polymorphisms and clinical manifestations.Results:?Seven?females (25%) and 21 males (75%)?participated in the study.?The mean age of the subjects with 95% CI is: 7.6 (6.1 - 9.0) years while the mean age at onset of disease with 95% CI is: 5.4 (3.9 - 7.0) years. Sixteen patients (57.14%) were younger than 6 years at the onset of disease. Seventeen (60.7%) subjects had normal eGFR, while 11 (39.3%) had chronic renal insufficiency. The mean eGFR of the subjects with 95% CI is: 111.4 (87.7 - 135.1) ml/min/1.73 m2. The mean systolic blood pressure with 95% CI is: 117.0 (108.9 - 125.1) mmHg and the mean diastolic blood pressure with 95% CI is: 77.0 (70.3 - 83.7) mmHg.?We identified 6 NPHS2polymorphisms,?i.e.?g.-52G>T, c.101A>G, g.-117C>T, c.288C>T, c.954C>T, and c.1038A>G and no mutation?was found. There was?no correlation?between?NPHS2 polymorphisms and clinical manifestations (p > 0.05). Conclusion: The?results demonstrate no mutation of NPHS2 gene, and the 6 NPHS2 gene polymorphisms that were identified have no correlation with the clinical manifestation in Indonesian children with SRNS.展开更多
文摘目的:本研究充分利用大样本病人探讨NPHS2基因C(-601)T-C357 T单倍型对IgA肾病的影响。方法:选择经肾活检病理诊断确诊的原发性IgA肾病患者537例及年龄、性别、地域匹配的健康对照组494例,采用聚合酶链式反应-限制性片段长度多态性(PCR-RFLP)方法检测NPHS2基因C(-601)T、C357 T多态性,同时选取单纯血尿和大量蛋白尿的IgA患者各16例进行PCR产物测序,对酶切结果进行验证。结果:①IgA肾病患者和健康对照中NPHS2基因C(-601)T、C357T基因型和等位基因频率分布均符合Hardy-Weinberg平衡定律(P>0.05)。②将NPHS2基因C(-601)T、C357T多态性构建单倍型,发现NPHS2基因T-T单倍型在IgA肾病患者中的比例较健康对照组明显增高(0.062759 vs 0.1032438,P=0.00198)。结论:本研究发现T-T单倍型在IgA肾病患者中的比例明显增高,提示NPHS2基因T-T单倍型对临床IgA肾病的发生及严重程度具有重要作用,为IgA肾病遗传背景的研究以及进一步阐明NPHS2基因的功能均提供了重要线索。
文摘Objective:?Although several NPHS2 gene mutations and polymorphisms were described and?associated with clinical manifestation of steroid-resistant nephrotic syndrome (SRNS),?the?occurrence of these genetic abnormalities or variants appeared?to be influenced by race and ethnic group. We have investigated?probable mutations and variants in NPHS2 gene involved in SRNS and their association with clinical manifestations. Methods: We examined 28 children?with primary SRNS?whovisited?the pediatric nephrology division of 10 teaching hospitals in Indonesia. Molecular genetic studies of the NPHS2 gene were?conducted through screenings?for the exon 1, exon 2, and exon 8. The mutational analysis of NPHS2 was performed by DNA sequencing.?Fisher’s Exact Test was used to determine?the?correlation?between?NPHS2 polymorphisms and clinical manifestations.Results:?Seven?females (25%) and 21 males (75%)?participated in the study.?The mean age of the subjects with 95% CI is: 7.6 (6.1 - 9.0) years while the mean age at onset of disease with 95% CI is: 5.4 (3.9 - 7.0) years. Sixteen patients (57.14%) were younger than 6 years at the onset of disease. Seventeen (60.7%) subjects had normal eGFR, while 11 (39.3%) had chronic renal insufficiency. The mean eGFR of the subjects with 95% CI is: 111.4 (87.7 - 135.1) ml/min/1.73 m2. The mean systolic blood pressure with 95% CI is: 117.0 (108.9 - 125.1) mmHg and the mean diastolic blood pressure with 95% CI is: 77.0 (70.3 - 83.7) mmHg.?We identified 6 NPHS2polymorphisms,?i.e.?g.-52G>T, c.101A>G, g.-117C>T, c.288C>T, c.954C>T, and c.1038A>G and no mutation?was found. There was?no correlation?between?NPHS2 polymorphisms and clinical manifestations (p > 0.05). Conclusion: The?results demonstrate no mutation of NPHS2 gene, and the 6 NPHS2 gene polymorphisms that were identified have no correlation with the clinical manifestation in Indonesian children with SRNS.
