|Year : 2020 | Volume
| Issue : 2 | Page : 191-195
Serum Anti-Müllerian hormone in polycystic ovary syndrome and its relationship with insulin resistance, lipid profile and adiponectin
Thien Jun Jun1, Aniza Mohammed Jelani2, Julia Omar2, Rahimah Abdul Rahim3, Najib Majdi Yaacob4
1 Department of Pathology, Sarawak General Hospital, Kuching, Sarawak, Malaysia
2 Department of Chemical Pathology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
3 Department of Obstetric and Gynaecology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
4 Unit of Biostatistic and Research Methodology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
|Date of Submission||04-Aug-2019|
|Date of Decision||29-Nov-2019|
|Date of Acceptance||16-Dec-2019|
|Date of Web Publication||30-Apr-2020|
Aniza Mohammed Jelani
Department of Chemical Pathology, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan
Source of Support: None, Conflict of Interest: None
| Abstract|| |
Objectives: This study was done to estimate serum anti-Müllerian hormone (AMH) level in polycystic ovary syndrome (PCOS) patients and to correlate serum AMH level with insulin resistance, lipid profile, and adiponectin levels. Materials and Methods: A cross-sectional study was conducted at Hospital Universiti Sains Malaysia (Hospital USM), Health Campus, Kubang Kerian, Kelantan, Malaysia. Thirty newly diagnosed patients with PCOS attending gynecology clinic between July 2016 and April 2017 were recruited. Fasting venous blood samples were collected from the subjects. Serum AMH, insulin, adiponectin, triglycerides, high-density lipoprotein cholesterol (HDL-C), and plasma glucose levels were measured, and insulin resistance was calculated based on homeostasis model of assessment-insulin resistance (HOMA-IR). The serum AMH level was estimated, and the correlation of serum AMH level with the metabolic parameters was analyzed. Results: The median of serum AMH levels in women with PCOS was 6.8 ng/mL (interquartile range: 7.38 ng/mL). There was a significant negative correlation between serum AMH and HOMA-IR or triglyceride levels (r = −0.49, P = 0.006 and r = −0.55, P = 0.002, respectively). A significant positive correlation was observed between serum AMH and serum HDL-C or serum adiponectin levels (r = 0.56, P = 0.001 and r = 0.44, P = 0.014, respectively) in all study subjects. Conclusion: The serum AMH level is associated with HOMA-IR, triglycerides, HDL-C, and adiponectin levels, and hence it may be used as a potential cardiometabolic risk marker in women with PCOS.
Keywords: Adiponectin, Anti-Müllerian hormone, insulin resistance, lipid profile, Polycystic ovary syndrome
|How to cite this article:|
Jun TJ, Jelani AM, Omar J, Rahim RA, Yaacob NM. Serum Anti-Müllerian hormone in polycystic ovary syndrome and its relationship with insulin resistance, lipid profile and adiponectin. Indian J Endocr Metab 2020;24:191-5
|How to cite this URL:|
Jun TJ, Jelani AM, Omar J, Rahim RA, Yaacob NM. Serum Anti-Müllerian hormone in polycystic ovary syndrome and its relationship with insulin resistance, lipid profile and adiponectin. Indian J Endocr Metab [serial online] 2020 [cited 2021 Jul 23];24:191-5. Available from: https://www.ijem.in/text.asp?2020/24/2/191/283546
| Introduction|| |
Polycystic ovary syndrome (PCOS), is a disorder characterized by heterogeneous clinical presentations including hyperandrogenism, menstrual irregularity, and infertility along with metabolic disturbances manifested by hyperinsulinemia, obesity, hypertension, and dyslipidemia.
Anti-Müllerian hormone (AMH), also known as Müllerian-inhibiting substance (MIS), is a dimeric glycoprotein hormone with a molecular weight of 140 kDa. AMH is well-known for its role as a useful marker of ovarian reserve, as it reflects the size of the resting primordial follicle pool. In PCOS, AMH is thought to be a potential surrogate marker for the diagnosis particularly in the absence of ultrasound.
Recently, researchers are focusing on the relationship between AMH and metabolic factors such as homeostasis model of assessment-insulin resistance (HOMA-IR), lipid profile, and adiponectin. Knowledge on the relationship between AMH and the metabolic parameters may have significant clinical implications. The metabolic parameters represent the components of metabolic syndrome (MetS), which commonly presents in patients with PCOS. IR plays an important role in PCOS pathophysiology and it leads to compensatory increase in insulin level and hyperinsulinemia. AMH level is also found to be increased in patients with PCOS. Insulin and AMH are believed to have influence on steroidogenesis and folliculogenesis.,,, Based on this, there is a possibility that AMH has a relationship with IR and other MetS components including lipid profile particularly triglycerides (TG) and HDL-C. AMH might also have a relationship with adiponectin, a novel biomarker for its relationship with IR and other MetS components.
Studies regarding the correlation between AMH and IR using HOMA-IR have been done, but the findings have been mixed. A study by Park et al. in women without PCOS found that there was a negative correlation between AMH and HOMA-IR. However, Bleil et al. demonstrated no association between both parameters. In PCOS, inconsistent results have also been reported, and there were studies that demonstrated positive, negative, and even nil association between AMH and IR.,,,
Regarding correlation between AMH and lipid profile, very few studies have been reported and the findings were controversial., Adiponectin, an important marker of MetS, was noted to have positive correlation with AMH in women without PCOS, but no such association was noted in patients with PCOS.
In view of contradicting results from previous studies done in patients with PCOS, this study was conducted to show the type of relationship between AMH and these markers (HOMA-IR, TG, HDL-C, and adiponectin) in our population.
| Materials and Methods|| |
This cross-sectional study was conducted at Hospital Universiti Sains Malaysia (Hospital USM), Kelantan, Malaysia. Newly diagnosed patients with PCOS (age 18–40 years) who attended gynecology clinic, Hospital USM, between July 2016 and April 2017 were recruited. The diagnosis of PCOS was made according to Rotterdam ESHRE-ASRM (2003) criteria. Patients with endocrinopathies such as thyroid disorder, Cushing's syndrome, and diabetes mellitus were excluded. Patients on medications such as oral contraceptives, hormonal treatment, antidiabetics, lipid-lowering agent, and weight reduction therapy were also excluded.
The study was conducted with the approval of the Human Research Ethics Committee USM (HREC), and written informed consent was obtained from all subjects.
A fasting venous blood of 10 mL was collected in the morning after an overnight fast of 10–12 h irrespective of the day of menstrual cycle. The blood was dispensed into two tubes, a plain tube for AMH, insulin, high-density lipoprotein cholesterol (HDL-C), TG, and adiponectin analyses and an oxalate/fluoride tube for glucose measurement. Both tubes were centrifuged and the samples were stored at − 80°C until analysis. Serum HDL-C, serum TG, and plasma glucose level were analyzed by batch.
AMH and insulin measurements were carried out on Cobas e 411 analyzer (Roche Diagnostics). The intra- and interassay variability at AMH concentration of 2.44 and 12.3 ng/mL was 1.2%, 3.3% and 1.1%, 3.7%, respectively. For insulin, the intra- and interassay variability at concentration of 21.9 and 74.3 μU/mL was 3.2%, 4.2% and 3.7%, 4.6%, respectively. Glucose, TG, and HDL-C were measured on an ARCHITECT C8000 chemistry analyzer (Abbott Diagnostics). The interassay variability of TG at 1.00 and 2.65 mmol/L was 0.89% and 1.54%, respectively. For HDL-C, at concentration of 0.54 and 2.04 mmol/L, the intra- and interassay variability was 1.7%, 1.0% and 1.1%, 0.5%, respectively. Adiponectin measurement was based on enzyme-linked immunosorbent assay (ELISA) method using RayBio® Human Acrp30 ELISA Kit (RayBiotech). The intra- and interassay variability was <10% and <12%, respectively. HOMA-IR index was calculated based on fasting plasma glucose concentration and serum insulin with standard formula: HOMA-IR = fasting concentration of insulin (μU/mL) × fasting concentration of glucose (mmol/L)/22.5.
The sample size was calculated using G*power software version 22.214.171.124 (test family: exact; statistical test: correlation, bivariate normal model). For a correlation coefficient of 0.5 under alternative hypothesis (ρHa = 0.5) to be statistically significant with two tail type I error of 0.05, type II error of 80%, and correlation coefficient under null hypothesis of 0 (ρ H0 = 0), the required sample size was 29. Anticipating 10% dropout due to preanalytical error, the adjusted number of study participants required in this study was 33 patients with PCOS. It was expected that the number of patients with PCOS receiving treatment in Hospital USM throughout the study period is equal to the number of patients required based on sample size calculation. Therefore, no sampling method was applied in this study and all eligible patients with PCOS who fulfilled the eligibility criteria were included.
Data analysis was performed using SPSS Statistical Package version 22. The distribution of numerical variables was examined using test of normality (Shapiro–Wilk test) and histogram with overlap normal curve. Normally distributed numerical variables were described as mean and standard deviation (SD), whereas non-normally distributed numerical variables were described as median and interquartile range (IQR). Serum AMH level was estimated using descriptive statistics function in SPSS to obtain the measure of central tendency and dispersion. The estimated level was reported as median (IQR) together with range (minimum and maximum values). To determine linear relationship between AMH and other metabolic parameters (insulin, TG, HDL-C, HOMA-IR), assumption for Pearson's correlation was assessed during data analysis. Assessment of normal distribution of the variables was examined by histogram and scatterplot. This assumption was violated because AMH, HOMA-IR, TG, and adiponectin were non-normally distributed. Bivariate correlation analyses were therefore conducted using Spearman's correlation. P value < 0.05 was used as statistically significant.
| Results|| |
Thirty women who met the criteria for PCOS were included in the study. The mean age was 27.8 ± 4.08 years. The range of serum AMH level measured was between 2.4 and 17.8 ng/mL with a median of 6.8 ng/mL and IQR of 7.38 ng/mL. The general characteristics of the study subjects with PCOS are given in [Table 1].
Correlation analyses were performed between serum AMH and metabolic parameters in women with PCOS as shown in [Table 2]. There was a negative moderate correlation between serum AMH and HOMA-IR, which was statistically significant (r = −0.49, P = 0.006). There was also a significant inverse moderate correlation between serum AMH and serum TG (r = −0.55, P = 0.002). A significant positive moderate correlation was observed between serum AMH and serum HDL-C in all study subjects (r = 0.56, P = 0.001). There was a positive fair correlation found between serum AMH and serum adiponectin in women with PCOS, which was statistically significant (r = 0.44, P = 0.014).
|Table 2: Correlations between serum AMH and HOMA-IR, triglycerides, HDL-C, and adiponectin in women with polycystic ovary syndrome|
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| Discussion|| |
PCOS is a complex reproductive and hormonal disorder associated with derangement in metabolic parameters which indicates a risk for long-term clinical complications.
In our study, the median HOMA-IR was 5.0 (5.52) which suggests the presence of IR. This is in line with the findings from previous studies regarding IR in PCOS., The association between AMH levels and HOMA-IR in patients with PCOS was inconsistent based on previous studies.,,, The contributing factors to the mixed results in previous studies were due to the possibility of differences in ethnicity, sample size, and anthropometry of the study subjects. However, the actual mechanism of action of insulin on AMH production is still not clear. In our study, a significant negative moderate correlation between serum AMH and HOMA-IR (r = −0.49, P = 0.006) was found. This observation is similar to studies done by Chen et al. and Feldman et al. The negative correlation between AMH and HOMA-IR could be due to the effect of oxidative stress in IR on ovarian granulosa cell function. AMH is produced by the granulosa cells of ovaries and IR has been associated with oxidative stress., The role of oxidative damage to granulosa cells has been hypothesized by Park et al. and De Bruin et al., Therefore, the same hypothesis could be applied in this study indicating that oxidative stress in patients with IR may induce injury to granulosa cells and subsequently decrease AMH production. However, this hypothesis needs further evaluations.
Hypertriglyceridemia and low HDL-C are common metabolic abnormalities found in women with PCOS. A study by Aye et al. suggested that the presence of hypertriglyceridemia could contribute to atherothrombosis via platelet hyperactivation in PCOS. The high prevalence of low HDL-C in women with PCOS also contributes to the risk of cardiovascular disease. In our study, there was a significant negative moderate correlation between serum AMH and serum TG (r = −0.55, P = 0.002). This finding is contrary to the results published by Cui et al. and Feldman et al. which stated no significant correlation was found in women with PCOS., There was a significant positive moderate correlation observed between serum AMH levels and serum HDL-C levels in this study (r = 0.56, P = 0.001). This result is consistent with a study done by Feldman et al. However, Cui et al. and Skalba et al. showed negative and no correlation, respectively, which are contradictory to our finding., The correlation between AMH and lipid profile in our study might suggest the potential utility of AMH as a biomarker for cardiovascular risk assessment. Further evaluation is needed to confirm these findings.
The median level of adiponectin in our study was 2.5 μg/mL, which was lower than normal population. This is consistent with a number of studies demonstrating lower adiponectin levels in PCOS., The hormone possesses insulin sensitizing and anti-atherosclerotic properties which may reduce the development of metabolic disorders such as type 2 diabetes mellitus, obesity, and cardiovascular diseases. The association between serum adiponectin and MetS is also noted in patients with PCOS based on study done by Ko et al. There was a significant positive fair correlation between serum AMH and serum adiponectin levels in this study (r = 0.44, P = 0.014). Woo et al. reported no association between serum AMH and adiponectin in patients with PCOS; however, positive correlation was described in patients without PCOS. The findings in our study could be explained by the relationship between adiponectin and IR which affect AMH production. Adiponectin was found negatively correlated with IR (HOMA-IR) in overweight subjects and in patients with PCOS.,, IR is closely related to PCOS pathophysiology and it may lead to reduced AMH production as mentioned earlier. Therefore, due to the impact of adiponectin on improving insulin sensitivity, there is possibility that adiponectin will be able to increase AMH production.
A number of studies have evaluated the level of AMH in patients with PCOS. The value of AMH is known to be higher in patients with PCOS than without PCOS. There are evidences that serum AMH level varied across different ethnicities., There could be both genetic and environmental factors that affect the serum AMH levels in different ethnic groups., A recent study on serum AMH levels across different ethnic group by Bhide et al. reported that the levels of serum AMH are higher in South Asian Women than in white European and Afro-Caribbean women and described the influence of smoking status on AMH level. In this study, the median level of AMH represents all patients with PCOS attending the gynecological clinic in Hospital USM. Further studies with larger sample size including recruitment from other hospitals in Kelantan State are needed for better estimation of AMH in women with PCOS in the population.
| Conclusion|| |
In summary, our study demonstrates that serum AMH has association with HOMA-IR, TG, HDL, and adiponectin levels. Thus, it may be used as a potential cardiometabolic risk marker in patients with PCOS.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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[Table 1], [Table 2]
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