Association between endometriosis and polymorphisms in insulin-like growth factor binding protein genes in Korean women

Objective

Genetic factors are known to be associated with the development and progression of endometriosis, but the genes related to endometriosis have not been defined. Insulin-like growth factor binding proteins (IGFBPs) are believed to be involved in the proliferation and apoptosis of cells that play an important role in the pathophysiologic mechanism of endometriosis. This study aimed to determine the association between endometriosis and polymorphisms of the IGFBP genes in Korean women.

Study design

In a case–control study, the rs1995051, rs1065780 and c.759A > G single nucleotide polymorphisms (SNPs) in the IGFBP1 gene and the −672A > G, −202A > C and c.95C > G SNPs in the IGFBP3 gene were analyzed in 128 women with endometriosis and 108 normal control women.

Results

The haplotype genotype composed of a combination of three IGFBP1 gene polymorphisms was not related to endometriosis, while the haplotype genotype of the IGFBP3 gene had a significant association with endometriosis. Women not carrying the AAG (−672A/−202A/c.95G) haplotype allele of three IGFBP3 gene polymorphisms have a 3.19-times higher risk of endometriosis compared with women with AAG homozygotes, and this trend was found in women with advanced endometriosis but not in women with early endometriosis.

Conclusions

The AAG haplotype allele of the −672A > G, −202A > C and c.95C > G polymorphisms in the IGFBP3 gene may be associated with advanced endometriosis in Korean women.     

Association between endometriosis and polymorphisms in insulin-like growth factors (IGFs) and IGF-I receptor genes in Korean women

Objectives

To evaluate the relationship between endometriosis and polymorphisms in insulin-like growth factors (IGFs) and IGF-I receptor genes.

Study design

In a case-control study, 128 women with endometriosis and 108 control women were recruited at the Department of Obstetrics and Gynecology in Seoul National University Hospital. Determinations of −969(CA) block, −603A>T, and −553T>C single nucleotide polymorphism (SNP)s in the IGF-I gene, c.517C>T, c.540G>T and 820G>A SNPs in the IGF-II gene, and c.3129G>A SNP in the IGF-I receptor gene were performed to evaluate the prevalence of IGFs and IGF-I receptor genotypes or alleles.

Results

Among studied SNPs, the IGF-II 820G>A polymorphism was associated with endometriosis. Women with endometriosis were observed 1.99 times more frequently in the GG genotype of the IGF-II 820G>A polymorphism compared with non-GG genotype (95% confidence level: 1.18-3.35). The similar finding was observed only in early stage endometriosis (stages I and II).

Conclusions

The IGF-II 820G>A polymorphism is a genetic factor which may be associated with the development of endometriosis in Korean women.     

MMP-2、TIMP-1和TIMP-2在胚胎停育绒毛和蜕膜组织中的表达

目的:探讨MMP-2,TIMP-1和TIMP-2与胚胎停育的关系。方法:选取胚胎停止发育妇女为病例组,另设同期正常早孕自愿要求流产的妇女为对照组,分别留取其绒毛和蜕膜组织标本,采用半定量RT-PCR法对标本MMP-2,TIMP-1和TIMP-2 mRNA转录水平进行分析。结果:在绒毛标本中,MMP-2和TIMP-1 mRNA在病例组中表达水平显著低于对照组(P<0.01);而TIMP-2mRNA表达水平组间差异无统计学意义(P>0.05)。在蜕膜标本中,病例组TIMP-1 mRNA的表达水平显著低于对照组(P<0.01)。而MMP-2和TIMP-2 mRNA的表达水平组间差异无统计学意义(P>0.05)。结论:MMP-2,TIMP-1和TIMP-2的差异表达可能参与了胚胎停育的发生发展。     

Association between endometriosis and polymorphisms in endostatin and vascular endothelial growth factor and their serum levels in Korean women

The aim of present study was to evaluate the relationship between endometriosis and polymorphisms in the endostatin and vascular endothelial growth factor (VEGF) genes, and their levels in serum in a Korean population. Serum endostatin levels (but not VEGF levels) were negatively correlated with the development of endometriosis, specifically in early-stage endometriosis patients, compared with women without endometriosis, but endometriosis was not associated with the endostatin G(4349)A and VEGF C(936)T polymorphisms.     

Contribution of TIMP3 polymorphisms to the development of preeclampsia in Han Chinese women

Purpose

The aim of this study was to investigate whether polymorphisms in the tissue inhibitor of metalloproteinase 3 gene (TIMP3) are associated with the risk of preeclampsia (PE) in Han Chinese women.

Methods

Nine single TIMP3 tag-single nucleotide polymorphisms were selected by Haploview and genotyped using the Sequenom method in 181 preeclamptic and 203 healthy pregnant women from eastern China.

Results

The allele frequencies of the tag-single nucleotide polymorphisms were not significantly different between groups (P > 0.05). However, the genotype distribution of rs135025 was shown to differ between the multigravidity PE subgroup (>3) and controls under additive (P = 0.018) and recessive models (P = 0.008), while the genotype distribution of rs80272 differed significantly between the severe PE subgroup and controls under additive (P = 0.014) and dominant models (P = 0.041). Moreover, the H2 haplotype (A-C-G-T-A-A-G-C-G) was found to be associated with the risk of PE (P = 0.035).

Conclusions

Genotypes of rs135025 and rs80272 in TIMP3 may therefore influence susceptibility to PE, and pregnant women carrying the H2 haplotype might be more prone to developing PE.

Electronic supplementary material

The online version of this article (doi:10.1007/s10815-015-0529-8) contains supplementary material, which is available to authorized users.     

Gelatinase A (MM-2), gelatinase B (MMP-9) and their inhibitors (TIMP 1, TIMP-2) in serum of women with endometriosis: Significant correlation between MMP-2, MMP-9 and their inhibitors without difference in levels of matrix metalloproteinases and tissue inhibitors of metalloproteinases in relation to the severity of endometriosis

Endometriosis is a highly prevalent gynecological condition, where the formation of endometriotic foci is linked with locally increased activity of matrix metalloproteinases (MMPs). In the present study, we tested the hypothesis that raised serum levels of MMPs might reflect the severity of endometriosis. We compared serum levels of MMP-2 and MMP-9, and of their tissue inhibitors TIMP-1 and TIMP-2, in infertile women, matched for age and body mass index, with either mild (stage I, END-I; n = 15) or severe endometriosis (stage IV, END-IV; n = 22). There was no difference in the concentrations of MMP-2, MMP-9, TIMP-1 and TIMP-2 between the analyzed groups. There was, however, a correlation between MMP-9 and TIMP-1 for the combined group (n = 37) (r = 0.48; p = 0.0032) and in women with END-IV (r = 0.51; p = 0.0163), as well as a highly significant correlation between MMP-2 and TIMP-2 for the combined group (r = 0.69; p = 0.0001), END-I (r = 0.51; p = 0.0406) and END-IV groups (r = 0.77; p = 0.0001). There was also a significant correlation between TIMP-1 and TIMP-2 in the combined and END-IV groups (r = 0.39; p = 0.0182 and r = 0.5450; p = 0.0099, respectively). The balance between MMPs and their inhibitors is preserved in the serum of women with endometriosis, but serum concentrations of MMP-2, MMP-9, TIMP-1 and TIMP-2 cannot be considered to represent a valid measure of the severity of endometriosis.     

Association of epidermal growth factor receptor gene polymorphisms with advanced endometriosis in a Korean population

Objectives

To determine if specific single nucleotide polymorphisms (SNPs) in the Epidermal Growth Factor Receptor (EGFR) gene were meaningful markers for the risk of advanced stage endometriosis in a Korean population.

Study design

Case–control study in a collective of 299 women with endometriosis and 285 controls. Three polymorphisms (151904 A > T [T628T] on exon 16 [rs 17337023], 162093 G > A [Q787Q] on exon 20 [rs 10251977], and 181946 C > T [D994D] on exon 25 [rs 2293347]) were assessed by a Minor Groove Binder (MGB) primer/probe Taqman assay. In-silico haplotypes were deduced using the Haploview (version 3.32) software package.

Results

There were no statistically significant differences in the genotype or haplotype frequencies of the three EGFR polymorphisms between subjects with endometriosis versus the control group. Even when the endometriosis cases were subdivided into stage III and IV based on the ASRM criteria, no statistically significant differences in genotype distribution or haplotype frequencies were observed between the three groups.

Conclusions

Our results suggest that the 151904 A > T, 162093 G > A, and 181946 C > T polymorphisms in the EGFR gene are not associated with advanced stage endometriosis in a Korean population. Our results are in agreement with the results reported by Inagaki et al.     

基质金属蛋白酶-9及其组织抑制剂TIMP-3在子宫内膜异位症的表达

目的 :探讨基质金属蛋白酶 9(MMP 9)及其抑制剂TIMP 3在子宫内膜异位症发生发展中的作用。方法 :采用免疫组化链霉菌抗生物素蛋白 过氧化物酶染色法 (SP法 )检测 4 3例子宫内膜异位症的异位内膜和在位内膜中MMP 9、TIMP 3的表达 ,以 19例正常子宫内膜为对照组 ,并用银染法观察腺上皮基底膜的完整性。结果 :在异位内膜组织的腺上皮细胞MMP 9呈高表达状态 ,与子宫内膜异位症在位内膜和正常子宫内膜相比 ,差异有高度显著性 (P <0 .0 1)。子宫内膜异位症的在位内膜和异位内膜TIMP 3均呈低表达 ,与正常内膜相比 ,差异有高度显著性 (P <0 .0 1) ,异位内膜较在位内膜TIMP 3的表达降低 ,差异有显著性 (P <0 .0 5 )。子宫内膜腺上皮的基底膜银染结果显示 :MMP 9与TIMP 3的染色强度比值与基底膜的阳性率呈负相关 (P <0 .0 1)。MMP 9、TIMP 3的表达强度与子宫内膜异位症的严重程度无显著相关性。结论 :异位内膜组织中MMP 9过度表达 ,而TIMP 3的表达下降 ,导致MMP 9/TIMP 3的比例增高 ,使子宫内膜异位症患者的异位内膜更具侵袭性 ,在子宫内膜异位症的发生发展中起重要作用     

Association study between epidermal growth factor receptor and epidermal growth factor polymorphisms and endometriosis in a Japanese population

Objective. We investigated a possible association between endometriosis and polymorphisms in the genes encoding epidermal growth factor (EGF) receptor (EGFR) and EGF in a Japanese population.

Methods. We compared the distribution of the Egfr+2073 A/T and Egf+61 G/A polymorphisms by polymerase chain reaction–restriction fragment length polymorphism analysis in 146 affected women and 181 controls.

Results. No significant differences in the frequency and genotype distribution of the Egfr+2073 A/T and Egf+61 G/A polymorphisms were found between endometriosis patients with all disease stages and controls. Stratification by disease stage had no effect on the results.

Conclusion. The Egfr+2073 A/T and Egf+61 G/A polymorphisms are not associated with an increased risk of endometriosis in a Japanese population.     

Cyclic changes in serum levels of insulin-like growth factor binding protein-1 in women treated with clomiphene citrate and tamoxifen

In order to investigate the cyclic changes of serum insulin-like growth factor-I (IGF-I), IGF binding protein-1 (IGFBP-1) and IGFBP-3 levels in menstrual cycles treated with or without antiestrogens (clomiphene citrate and tamoxifen), we treated 24 young women having irregular menstrual cycles with either clomiphene citrate (100 mg/day) (n = 12) or tamoxifen (60 mg/day) (n = 12) from the 5th to the 9th day of the menstrual cycle. Without antiestrogens, 12 women with regular menstrual cycles were recruited as controls. There was a preovulatory (day 13) peak of circulating IGFBP-1 in women treated with or without antiestrogens. A significant concomitant increase in serum estradiol was also observed on day 13 of the menstrual cycle in subjects treated with clomiphene citrate and in controls. However, no significant elevation in preovulatory estradiol was detected in women treated with tamoxifen. In clomiphene citrate and control groups, a significant positive correlation was found between circulating IGFBP-1 and estradiol, and between serum levels of IGFBP-1 and inhibin A at the preovulatory stage (on day 13). In contrast, no such association was observed in the tamoxifen group. Unlike cyclic changes in circulating IGFBP-1, serum concentrations of IGF-I and IGFBP-3 remained unchanged throughout the menstrual cycle in all groups. In conclusion, the preovulatory peak of circulating IGFBP-1 can be induced in cycles treated with both clomiphene citrate and tamoxifen. In addition, a significant positive correlation between estradiol, inhibin A and IGFBP-1 at the preovulatory stage indicates that IGFBP-1 may also reflect follicular development and may further be used as an additional indicator to monitor folliculogenesis under clomiphene citrate treatment.     

胎盘绒毛血管生成状况及VEGF、MMP-2和MMP-9表达与早期自然流产的关系

目的:探讨VEGF、MMP2和MMP9表达变化对胎盘绒毛血管生成的影响及与早期自然流产的关系。方法:选用CD34作为微血管标记物,应用免疫组化检测30例早期自然流产病例(自然流产组)和20例早期人工流产病例(人工流产组)胎盘绒毛微血管密度(MVD);RT-PCR检测胎盘绒毛VEGFmRNA的表达;酶谱分析法测定MMP-2和MMP-9的表达。结果:自然流产组VEGF121mRNA表达及MVD均明显低于人工流产组(P<0.01)。相关分析显示,两组中VEGF121mRNA相对表达量与MVD值均呈显著正相关(rθ=0.9794,rλ=0.9183)。自然流产组酶原型MMP-9的表达量显著低于人工流产组(P<0.01),激活型MMP-2的表达量显著高于人工流产组(P<0.01)。结论:孕期胎盘绒毛内VEGF121mRNA低表达所致的血管生成障碍以及MMP-2和MMP-9表达失调可能共同参与了早期自然流产的发生发展过程。     

Regulation of insulin-like growth factor binding protein secretion by human granulosa luteal cells in a polycystic ovary-like environment

OBJECTIVE: To determine the effect of androstenedione (A), insulin, and LH on secretion of insulin-like growth factor binding proteins (IGFBPs) from human granulosa luteal cells. DESIGN: Human granulosa cells were cultured for a total of 4 days in serum-free medium containing A (10(-6) mol/L), with or without insulin (100 microU/mL-800 microU/mL), LH (1 microU/mL-10 microg/L), and A (10(-5) mol/L). SETTING: Granulosa cells were obtained from IVF procedures. PATIENT(S): Women undergoing IVF for tubal disease. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Immunoassay and autoradiographs of Western ligand blotting detected IGFBP accumulations in the medium. RESULT(S): Cultured granulosa cells secreted IGFBP-1 through IGFBP-4. Insulin (100 microU/mL-800 microU/mL), LH (1 microg/L-10 microg/L), and A (10(-5) mol/L) caused a significant decrease in IGFBP-1 accumulation in the medium both alone and when added in combination. The release of IGFBP-2 and IGFBP-4 was significantly stimulated by insulin, whereas LH had no effect. Elevated levels of androgen (10(-5) mol/L) significantly stimulated the secretion of IGFBP-2, whereas the release of IGFBP-4 was reduced. CONCLUSION(S): These results demonstrate that androgen and insulin are important regulators of IGFBP release and that elevated levels of the two hormones may contribute to the altered IGFBP profile found in PCOS follicles, compared with the case of estrogen-dominant follicles.     

Association between genetic polymorphisms in androgen receptor gene and the risk of preeclampsia in Korean women

Purpose  

To investigate associations between the androgen receptor (AR) polymorphisms as CAG repeats, GGC repeats and c.211G>A polymorphism and the risk of preeclampsia.     

Association between human alpha 2-Heremans Schmidt glycoprotein (AHSG) polymorphism and endometriosis in Korean women

OBJECTIVE: To evaluate the relationship between the alpha 2-Heremans Schmidt glycoprotein (AHSG) gene polymorphism and endometriosis. DESIGN: Case-control study. SETTING: Department of Obstetrics and Gynecology, Seoul National University Hospital, Korea. PATIENT(S): Seventy-nine women with endometriosis and 105 women without endometriosis. INTERVENTION(S): Determination of AHSG gene polymorphism. MAIN OUTCOME MEASURE(S): Prevalence of AHSG genotypes or alleles. RESULT(S): The allele frequencies of AHSG 1 and AHSG 2 were found to be 0.69 and 0.31, respectively. The proportion of noncarriers of the AHSG 2 allele was significantly higher in women with endometriosis than in women without (55.7% vs. 39.0%). Women not carrying the AHSG 2 allele were found to have twice the risk of endometriosis than those carrying at least one copy of this allele. No significant difference was noted in the distribution of the AHSG alleles or AHSG genotypes between early stage endometriosis and late stage endometriosis. CONCLUSION(S): Endometriosis is associated with the AHSG gene polymorphism in Korean women.     

Raised serum levels of matrix metalloproteinase-9 in women with polycystic ovary syndrome and its association with insulin-like growth factor binding protein-1

Background.?It has been suggested in recent studies that matrix metalloproteinases (MMPs) may be implicated in the pathogenesis of polycystic ovary syndrome (PCOS) through regulating ovarian tissue remodeling. In addition to degrading the extracellular matrix, MMPs exhibit the ability to cleave insulin-like growth factor binding protein-1 (IGFBP-1), the major regulator of insulin-like growth factor-I (IGF-I) in serum. The present study aimed to investigate the possible role of MMPs in the pathophysiology of PCOS.

Methods.?Serum levels of MMP-9, tissue inhibitor of metalloproteinase-1 (TIMP-1), IGF-I and IGFBP-1 were measured in 42 patients with PCOS and 30 healthy women with regular menstruation, matched for age and body mass index. Correlation between IGFBP-1 and other parameters in the PCOS group was analyzed by Pearson's linear correlations.

Results.?Serum MMP-9 concentrations and MMP-9/TIMP-1 ratios were significantly higher in PCOS women than in controls. Serum levels of IGFBP-1 were markedly lower in the PCOS group. There was a negative correlation between serum IGFBP-1 and MMP-9 in women with PCOS.

Conclusion.?Our results raise the possibility that MMPs may be implicated in the pathophysiology of PCOS either by regulating ovarian tissue remodeling or indirectly by facilitating IGF-I bioavailability through proteolysis of IGFBP-1.     

Association between the vascular endothelial growth factor gene polymorphisms and the risk of polycystic ovary syndrome in Northern Chinese women

The present study aimed to investigate whether the single nucleotide polymorphisms (SNPs) rs2010963 and rs833061 in vascular endothelial growth factor (VEGF) gene is correlated with the risk of polycystic ovary syndrome (PCOS) in Northern Chinese women, as a preliminary study. This case-control study comprised 118 women with PCOS and 130 healthy women as controls. Genotyping of the two polymorphisms within the VEGF gene 5′-untranslated region and promoter region were performed using polymerase chain reaction ligase detection reaction method. The data showed that there was a significant difference in the genotype and allele distribution of the rs2010963 polymorphism between the PCOS group and the control group (p?=?.020 and .033, respectively). The women carrying the C allele (G/C?+?C/C genotype) had a lower risk of PCOS compared with the women with G/G genotype [odds ratio (OR?=?0.55; 95% confidence interval (CI)?=?0.33–0.91]. Our study shows for the first time that the rs2010963 polymorphism may be associated with a risk of PCOS in Northern Chinese women.     

子痫前期患者滋养细胞浸润相关基因mRNA及蛋白表达的研究

目的研究子痫前期患者胎盘滋养细胞基质金属蛋白酶(MMP)9、2及其组织抑制物(TIMP)1、2,肿瘤转移抑制基因KiSS-1 mRNA、蛋白的表达变化及其与子痫前期发病的关系。方法采用RT-PCR、免疫印迹(western blot)法对30例正常足月妊娠妇女(正常妊娠组)和10例妊娠期高血压患者(高血压组)及27例子痫前期(子痫前期组)患者胎盘滋养细胞中MMP-9、MMP-2、KiSS-1、TIMP-1和TIMP-2基因mRNA及蛋白表达水平[均以相对吸光度(A)表示]进行检测;应用明胶酶谱分析法,检测3组妇女胎盘孵育液MMP-9、MMP-2活性。结果(1)胎盘滋养细胞浸润相关基因mRNA表达水平:子痫前期组MMP-9、MMP-2 mRNA表达水平分别为0．39±0．05和0．71±0．16,均明显低于正常妊娠组的0．78±0．11和1．63±0．31,两组分别比较,差异有统计学意义(P均<0．05)。高血压组MMP-9 mRNA的表达水平明显高于重度子痫前期患者,差异有统计学意义(P<0．05)。子痫前期组胎盘滋养细胞KiSS-1 mRNA和TIMP-1 mRNA的表达水平分别为1．97±0．21和1．11±0．18,均明显高于正常妊娠组的0．69±0．27和0．65±0．19,差异均有统计学意义(P<0．05);高血压组胎盘滋养细胞KiSS-1 mRNA表达水平低于子痫前期组,但与正常妊娠组比较,差异无统计学意义(P>0．05)。重度子痫前期患者胎盘滋养细胞TIMP-2 mRNA表达水平明显高于正常妊娠组,差异均有统计学意义(P<0．05)。(2)胎盘滋养细胞浸润相关基因的蛋白表达水平:子痫前期组MMP-9、MMP-2基因的蛋白表达水平分别为1．07±0．35和0．74±0．23,均明显低于正常妊娠组的2．43±0．92和1．48±0．78,差异均有统计学意义(P<0．05)。子痫前期组胎盘KISS-1和TIMP-1蛋白表达水平分别为2．46±0．39和1．51±0．40,均明显高于正常妊娠组的0．91±0．35和0．93±0．56,差异均有统计学意义(P<0．05)。子痫前期组胎盘滋养细胞TIMP-2蛋白表达水平与正常妊娠组及高血压组比较,差异均无统计学意义(P>0．05)。(3)胎盘MMP-9和MMP-2酶比活性:子痫前期组分别为(2．67±0．53)和(1．13±0．28)灰度·g-1·L-1,均明显低于正常妊娠组的(8．44±3．70)和(3．87±1．43)灰度·g-1·L-1,差异均有统计学意义(P<0．05)。结论子痫前期患者胎盘滋养细胞促进浸润基因。MMP-9、MMP-2表达降低和抑制浸润基因KiSS-1和TIMP-1表达升高,可能在子痫前期胎盘缺血缺氧中起重要作用。     

Association between the high soluble fms-like tyrosine kinase-1 to placental growth factor ratio and adverse outcomes in asymptomatic women with early-onset fetal growth restriction

Objective: To assess whether the high soluble fms-like tyrosine kinase-1 (sFlt-1) to placental growth factor (PlGF) ratio is associated with adverse outcomes (e.g., HELLP syndrome [hemolysis, elevated liver enzymes, and low platelets], severe hypertension uncontrolled by medication, non-reassuring fetal status, placental abruption, pulmonary edema, growth arrest, maternal death, or fetal death) and a shorter duration to delivery in early-onset fetal growth restriction (FGR).Methods: Thirty-four women with FGR diagnosed at <34.0 weeks were recruited. Serum angiogenic marker levels were estimated within 6 hours of a diagnosis of FGR. A receiver operating characteristic curve was used to determine the threshold of the sFlt-1/PlGF ratio to predict adverse outcomes. We used multivariable logistic regression analysis to examine the association between the sFlt-1/PlGF ratio and adverse outcomes. Finally, we used Kaplan-Meier analysis and the log-rank test to assess the probability of delay in delivery.

Results: Women who developed adverse outcomes within a week had a significantly higher sFlt-1/PlGF ratio than did those who did not develop complications. A cutoff value of 86.2 for the sFlt-1/PlGF ratio predicted adverse outcomes, with a sensitivity and specificity of 77.8% and 80.0%, respectively. Moreover, 58.4% of women with an sFlt-1/PlGF ratio ≥86.2 versus 9.1% of those with an sFlt-1/PlGF ratio <86.2 delivered within a week of presentation (p < 0.001). In multivariate analyses, an sFlt-1/PlGF ratio ≥86.2 (adjusted odds ratio 9.52; 95% confidence interval, 1.25–72.8) was associated with adverse maternal and neonatal outcomes.

Conclusion: A high sFlt-1/PlGF ratio was associated with adverse outcomes and a shorter duration to delivery in early-onset FGR.