scholarly journals Testosterone in Female Depression: A Meta-Analysis and Mendelian Randomization Study

Biomolecules ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 409
Author(s):  
Dhruba Tara Maharjan ◽  
Ali Alamdar Shah Syed ◽  
Guan Ning Lin ◽  
Weihai Ying
Keyword(s):  
Mendelian Randomization ◽  
Meta Analysis ◽  
Menopausal Status ◽  
Serum Testosterone ◽  
Serum Levels ◽  
Testosterone Levels ◽  
Mendelian Randomization Analysis ◽  
The Difference ◽  
Diagnostic Capabilities ◽  
Randomization Analysis

Testosterone’s role in female depression is not well understood, with studies reporting conflicting results. Here, we use meta-analytical and Mendelian randomization techniques to determine whether serum testosterone levels differ between depressed and healthy women and whether such a relationship is casual. Our meta-analysis shows a significant association between absolute serum testosterone levels and female depression, which remains true for the premenopausal group while achieving borderline significance in the postmenopausal group. The results from our Mendelian randomization analysis failed to show any causal relationship between testosterone and depression. Our results show that women with depression do indeed display significantly different serum levels of testosterone. However, the directions of the effect of this relationship are conflicting and may be due to menopausal status. Since our Mendelian randomization analysis was insignificant, the difference in testosterone levels between healthy and depressed women is most likely a manifestation of the disease itself. Further studies could be carried out to leverage this newfound insight into better diagnostic capabilities culminating in early intervention in female depression.

scholarly journals Causal relationship between obesity and serum testosterone status in men: A bi-directional mendelian randomization analysis

PLoS ONE ◽  
2017 ◽  
Vol 12 (4) ◽  
pp. e0176277 ◽  
Author(s):  
Joel Eriksson ◽  
Robin Haring ◽  
Niels Grarup ◽  
Liesbeth Vandenput ◽  
Henri Wallaschofski ◽  
...  
Keyword(s):  
Causal Relationship ◽  
Mendelian Randomization ◽  
Serum Testosterone ◽  
Mendelian Randomization Analysis ◽  
Randomization Analysis

Pituitary and gonadal function in prepubertal and pubertal cryptorchidism

1980 ◽  
Vol 95 (4) ◽  
pp. 553-559 ◽  
Author(s):  
A. Okuyama ◽  
H. Itatani ◽  
S. Mizutani ◽  
T. Sonoda ◽  
T. Aono ◽  
...  
Keyword(s):  
Serum Testosterone ◽  
Serum Levels ◽  
Seminiferous Tubules ◽  
Gonadal Function ◽  
Testosterone Levels ◽  
Serum Lh ◽  
Bilateral Cryptorchidism ◽  
Pubertal Boys ◽  
The Difference ◽  
Group Serum

Abstract. LRH and hCG tests were performed in 35 prepubertal and 35 pubertal boys with unilateral or bilateral cryptorchidism to examine the pituitary and gonadal function. Twenty-one normal boys were also examined as controls. In the prepubertal group, distinct increases in serum LH, FSH and testosterone levels by LRH and hCG tests were found in all of the normal and unilateral cryptorchid boys. However, no or very little response was observed in 4 out of 17 boys with bilateral cryptorchidism. In the pubertal group, serum levels of LH, FSH and testosterone in normal boys, in unilateral and in bilateral cryptorchid boys were evidently higher than those in the prepubertal group, and distinct or moderate responses by the LRH and hCG tests were found in all boys examined. Although serum testosterone levels were similar in all groups, serum basal and peak gonadotrophin levels by the LRH test were significantly higher in bilateral cryptorchid boys than in normal and unilateral cryptorchid boys. The difference was more marked in FSH than in LH level. An elevated level of serum LH is suggestive of the hypofunction of not only the seminiferous tubules but also of the Leydig cells in cryptorchid testes.

scholarly journals Mendelian randomization analysis of Circulating adiponectin levels on prostate cancer

2021 ◽  
Author(s):  
Liangliang Ren ◽  
Chenhao Yu ◽  
Zhenwei Zhou ◽  
Gonghui Li
Keyword(s):  
Prostate Cancer ◽  
Protective Effect ◽  
Genome Wide Association Study ◽  
Mendelian Randomization ◽  
Meta Analysis ◽  
Causal Effects ◽  
Nucleotide Polymorphisms ◽  
Genetic Associations ◽  
Mendelian Randomization Analysis ◽  
Randomization Analysis

Abstract Background: Previous observational studies showed a conflict with the correlation between circulating adiponectin levels and prostate cancer. Methods: In this study, we employed Mendelian randomization analysis to identify the causal effects between them. 14 single nucleotide polymorphisms were screened from the largest-scale genome-wide association study meta-analysis of adiponectin in a multi-ethnic population. The SNP outcome effects were obtained from Prostate Cancer Association Group to Investigate Cancer Associated Alterations in the Genome and Japanese Encyclopedia of Genetic Associations by Riken. Inverse variance weighted model with random-effects was the main effect estimation in our study, alongside weighted median, MR-Egger, and weighted mode models.Results: The results showed no significant causal estimate but a potential protective effect of adiponectin on prostate cancer. In addition, two other research of adiponectin repeated the analysis to avoid the bias of human species showing the similar results. Conclusion: Our study did not provide significant evidence to support the causal effects of circulating adiponectin levels on prostate cancer, but most of our results showed a potential protective effect requiring larger-scale MR analysis to confirm.

scholarly journals Association between systemic lupus erythematosus and cancer: findings from cohort studies and Mendelian randomization analysis

2021 ◽  
Author(s):  
Dongqing Gu ◽  
Mingshuang Tang ◽  
Huijie Cui ◽  
Min Zhang ◽  
Yutong Wang ◽  
...  
Keyword(s):  
Cohort Studies ◽  
Lupus Erythematosus ◽  
Odds Ratio ◽  
Observational Studies ◽  
Mendelian Randomization ◽  
Meta Analysis ◽  
European Ancestry ◽  
Mendelian Randomization Analysis ◽  
Increased Risk ◽  
Randomization Analysis

Abstract Background Observational studies suggested that systemic lupus erythematosus (SLE) was associated with an increased risk of cancer, however, the causal effect remains unclear. We aim to determine the causality between SLE and cancer using a meta-analysis and Mendelian randomization (MR) approach. Methods A systematic search was conducted using PubMed to identify cohort studies published before January 21, 2021. Meta-analysis was performed to calculate relative risk (RR) and corresponding 95% confidence intervals (CI), and the potentially causal relationships identified by observational studies were further validated using two-sample Mendelian randomization. Results Through meta-analysis of 43 cohort studies involving 231,499 patients, we observed an increased overall cancer risk among SLE patients (RR = 1.62, 95% CI, 1.47–1.79). Site-specific analysis suggested that SLE patients were associated with an increased risk of 17 cancers. Mendelian randomization analysis indicated that genetically predisposed SLE was causally associated with an increased risk of lymphoma (odds ratio = 1.0004, 95% CI, 1.0001–1.0007, P = 0.0035), whereas a decreased risk of bladder cancer (odds ratio = 0.9996, 95% CI, 0.9994–0.9998, P = 0.00004) in European ancestry. However, no relationship was observed between genetically predisposed SLE and risk of colon, pancreatic, lung, cervical and Non-melanoma skin cancer in European ancestry, liver cancer and lung cancer in Asian ancestry. Conclusions Findings from meta-analysis and Mendelian randomization analysis suggested that SLE might be causally associated with an increased risk of lymphoma. However, inconsistent results were observed between SLE and risk of bladder cancer.

scholarly journals Decreased serum pyridoxal levels in schizophrenia: meta-analysis and Mendelian randomization analysis

2018 ◽  
Vol 43 (3) ◽  
pp. 194-200 ◽  
Author(s):  
Yukiko Tomioka ◽  
Shusuke Numata ◽  
Makoto Kinoshita ◽  
Hidehiro Umehara ◽  
Shin-ya Watanabe ◽  
...  
Keyword(s):  
Mendelian Randomization ◽  
Meta Analysis ◽  
Mendelian Randomization Analysis ◽  
Randomization Analysis
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