Association of Androgenetic Alopecia with Metabolic Syndrome: A Case-control Study on 100 Patients in a Tertiary Care Hospital in South India

Exploring the Causal Relationship and Molecular Mechanisms Between Fasting Insulin and Androgenetic Alopecia: A Mendelian Randomization Study with Bioinformatics Analysis

Background

Prior studies have suggested a significant connection between fasting insulin (FI) and androgenetic alopecia (AGA), but the exact cause of this connection and underlying molecular mechanism has not been clarified. In this study, a Mendelian randomization (MR) analysis was utilized to discover the causal associations between FI and AGA.

Methods

Genome-wide association study (GWAS) data for FI and AGA were retrieved, and bidirectional MR analysis was conducted. FI-associated genes were identified through expression quantitative trait loci (eQTL) analysis, with enrichment analysis and a protein-protein interaction (PPI) network used to explore potential pathways and core genes.

Results

Forward MR analysis revealed a significant causal relationship between elevated FI levels and AGA (P=0.027, OR=43.944). Reverse MR analysis found no causal effect of AGA on FI (P=0.808, OR=1.0001). A total of 92 FI-associated genes were analyzed, with enrichment results indicating involvement in glycine, serine, and threonine metabolic pathways. EIF2B4 and NRBP1 were identified as potential core genes linking FI and AGA.

Conclusion

By using MR analysis, this study verified the possible causative connection between FIns and AGA by MR analysis. The core genes EIF2B4 and NRBP1, along with biological processes such as glycosylation and amino acid metabolism, may serve as crucial links.

The comparison of metabolic syndrome parameters, trichoscopic and trichoscan characteristics in androgenetic alopecia (AGA) and early-onset androgenetic alopecia (early-onset AGA)

Androgenetic alopecia (AGA), the most common cause of hair loss, is influenced by various risk factors. Metabolic syndrome constitutes a collection of risk factors elevating the risk of cardiovascular disease. The presence of early-onset AGA could serve as an indicator of the emergence of metabolic syndrome, yet to date, no research has examined these parameters in AGA. This is a cross-sectional study comparing two groups; early onset versus normal onset AGA. Forty participants were enlisted and evenly distributed into the two groups. Subsequently, participants underwent examinations utilizing trichoscopy, trichoscan, and laboratory assessments. Apart from waist circumference, BMI, and age of alopecia onset, there were no notable differences concerning sociodemographic and clinical features. In terms of hair growth parameters, the telogen hair rate stands out as the sole indicator exhibiting a significant difference between both groups, while trichoscopy data also revealed varying hair characteristics. Lastly, metabolic parameters namely triglyceride, fasting blood glucose, HbA1c and HDL differ significantly, with the normal onset group demonstrating a higher prevalence of metabolic abnormality. This suggests a potential association between AGA and metabolic syndrome. However, the exact nature of this relationship remains uncertain, necessitating further research with larger samples, specific age groups and diverse study designs.

Androgenetic Alopecia in Men: An Update On Genetics

Androgenetic alopecia (AGA) is defined as the alopecia induced by androgens in genetically predisposed individuals. AGA results in progressive miniaturization of the hair follicles leading to vellus transformation of terminal hair. The high prevalence and wide range of expressed phenotypes in AGA is a result of a polygenic inheritance mode. The androgen receptor (AR) gene located on the X chromosome at Xq11-12 is the first gene to show genetic association with AGA. Newer genetic associations with AGA are under study. In early-onset AGA, obesity, diabetes, hypertension, dyslipidaemia, insulin resistance, benign prostatic hyperplasia (BPH), prostate cancers and coronary artery disease (CAD) are associated with AGA. Screening of early-onset AGA patients and intervention for metabolic syndrome and insulin resistance can prevent the development of cardiovascular disease (CVD) at an early stage. As effective treatments continue to be topical minoxidil, systemic finasteride and hair transplantations, newer modalities are under investigation. Understanding the genetic factors involved in AGA and continued research into newer therapies, such as cell-based therapies, will lead to effective treatment and improve the quality of life in patients with AGA.

Association of Obesity and Bariatric Surgery on Hair Health

Obesity and obesity-related conditions today constitute a public health problem worldwide. Obesity is an "epidemic" chronic disorder, which is defined by the WHO as normal or excessive fat accumulation that may impair health. It is also defined for adults as a BMI that is greater than or equal to 30. The most common obesity-related diseases are type 2 diabetes mellitus, cardiovascular diseases, metabolic syndrome, chronic kidney disease, hyperlipidemia, hypertension, nonalcoholic fatty liver disease, and certain types of cancer. It has been also proven that obesity can have a negative effect on hair. It can lead to hair thinning. Patients with obesity can undergo bariatric surgery if they meet the inclusion criteria. The four common types of weight loss surgery include a duodenal switch with biliopancreatic diversion, laparoscopic adjustable gastric banding, Roux-en-Y gastric bypass, and sleeve gastrectomy. Bariatric surgery can affect skin and hair and is associated with telogen effluvium due to weight loss, microelement deficiency, anesthesia, low calorie intake, and low protein intake. Patients who undergo bariatric surgery can experience post-bariatric surgery depression. Hair loss can have a major impact on self-esteem, negatively affecting one's self-image. The purpose of this narrative review is to critically review how obesity, obesity-related diseases, and bariatric surgery affect hair health in general and the hair development cycle, and how they influence hair loss.

Study of Association of Dyslipidemia in Male Androgenetic Alopecia Patients in a Tertiary Care Hospital

INTRODUCTION

Androgenetic alopecia (AGA) is a hereditary and androgen-dependent progressive thinning of the scalp hair in a defined pattern. Several studies have reported an association between dyslipidemia and AGA. However, scarce data is available on association between severity of AGA and dyslipidemia. Hence, we performed a study to assess the clinical, epidemiological profile in male AGA patients and to compare lipid parameters among AGA cases and non-AGA controls to evaluate dyslipidemia association.

MATERIALS AND METHODS

This is a prospective case-control study included 108 age-matched AGA cases and non-AGA controls between 19-40 years. AGA was clinically diagnosed, and grading was done according to Norwood-Hamilton Classification. Fasting Lipid parameters for both cases and controls were determined using standard laboratory methods.

RESULTS

Among the cases and controls, the mean age was 26.20±5.353 years. There was a statistically significant association between AGA and mean total cholesterol (TC) (P<0.001), mean high-density lipoprotein (HDL) (P<0.001), mean low-density lipoprotein (LDL) (P<0.001) and mean cholesterol/HDL ratio (P<0.001), except for mean triglycerides (TG) (P=0.443). Grade 4 was the commonest grading (20.4%). As the severity of AGA increased, the lipid parameters were significantly deranged. It was evident Grade 4 onwards with statistically significant derangement in TC (P<0.001), TG (P=0.005), HDL (P=0.002), LDL (P <0.001) and cholesterol/HDL(P<0.001).

CONCLUSIONS

AGA was found to be significantly associated with dyslipidemia and more common among severe grades. AGA could be a cutaneous marker of underlying systemic illness. Early screening for dyslipidemia is beneficial in patients with AGA.

Assessment of Cardiovascular Risk Factors in Women Having Female Pattern Hair Loss

Background

Many studies have associated male androgenetic alopecia with the risk of cardiovascular disorders but very few studies have addressed this association in women with FPHL.

Materials and Methods

This was a cross-sectional hospital-based study in which a total of 50 women (18-45 years) were recruited. The objective was to measure carotid intima-media thickness (CIMT) by doppler ultrasound, Body mass index (BMI), waist circumference, lipid profile, fasting blood sugar (FBS), insulin, testosterone, Sex hormone binding globulin (SHBG), hs-CRP, ESR and fibrinogen, in pre-menopausal women having FPHL and to correlate these parameters with severity of FPHL. The prevalence of Metabolic syndrome (MetS) and Insulin resistance were evaluated.

Results

Metabolic syndrome and insulin resistance were found in 12 (24%) and 17 (34%) cases respectively. Hypercholesterolemia, elevated LDL levels and hypertriglyceridemia, low HDL levels and hyperinsulinemia were found in 11 (22%), 31 (62%), 9 (18%), 17 (34%) and 7 (14%) cases respectively. 8 (16%) cases were diabetics. Elevated ESR, increased fibrinogen levels and elevated hs-CRP were found in 43 (86%), 10 (20%) and 21 (42%) cases respectively. CIMT was found to be within its normal range. Correlation of CIMT, anthropometric indices (BMI and WC), biochemical markers (serum cholesterol, triglycerides, FBS, and fibrinogen), and presence of metabolic syndrome with severity of FPHL in terms of Ludwig grade was found to be statistically significant.

Conclusions

The determination of metabolic syndrome, insulin resistance and acute phase reactants such as hs-CRP and fibrinogen may be useful screening methods to detect increased cardiovascular risk in women with FPHL.

Male-pattern hair loss: Comprehensive identification of the associated genes as a basis for understanding pathophysiology

Male-pattern hair loss (MPHL) is a highly heritable and prevalent condition that is characterized by progressive hair loss from the frontotemporal and vertex scalp. This androgen-dependent hair loss may commence during puberty, and up to 80 % of European men experience some degree of MPHL during their lifetime. Current treatment options for MPHL have limited efficacy, and improved understanding of the underlying biological causes is required to facilitate novel therapeutic approaches. To date, molecular genetic studies have identified 389 associated genomic regions, have implicated numerous genes in these regions, and suggested pathways that are likely to contribute to key pathophysiological mechanisms in MPHL. This review provides an overview of the current status of MPHL genetic research. We discuss the most significant achievements, current challenges, and anticipated developments in the field, as well as their potential to advance our understanding of hair (loss) biology, and to improve hair loss prediction and treatment.

Androgenetic alopecia: Traditional cardiovascular risk factors, metabolic syndrome, and component traits among Nigerian adults

Background

Androgenetic alopecia (AGA) has been linked to cardiovascular diseases (CVDs) and metabolic syndrome (MetS). Works on AGA, cardiovascular risk factors (CVRFs) and MetS are rare among Nigerians.

Aim

This study set out to determine the relationship among CVRFs, MetS, and AGA.

Subjects and Methods

This is a cross-sectional study done among adults who were 18 years and above in selected communities in Ogbomoso on 260 consenting AGA participants as well as 260 age controls without AGA. They were matched for age and sex using a multistage sampling method. Anthropometric measurements, fasting blood glucose, and lipid profile samples were collected. MetS was diagnosed using International Diabetes Federation criteria. Data were analyzed using IBM SPSS version 20. Ethical approval was gotten before commencement of the study (LTH/OGB/EC/2017/162).

Result

Metabolic syndrome in AGA was higher than in controls (8.08% vs. 7.69%, p = 0.742). AGA was significantly associated with elevated mean systolic blood pressure (SBP) (p = 0.008), low High Density Lipoprotein (HDL-c) (p < 0.001), alcohol intake (p < 0.001), dyslipidaemia (p = 0.002), and sedentary lifestyle (p = 0.010). The correlates of AGA severity in male and female gender are age (p < 0.001 and 0.009 respectively), SBP (p = 0.024) and abdominal obesity (p = 0.027) in male gender.

Conclusion

AGA in Nigerians is associated with dyslipidaemia, alcohol intake, and sedentary lifestyle. AGA severity is related to age, higher mean SBP, abdominal obesity and low HDL-c in male and age, and Body mass index in females. Nigerians with AGA should be screened for dyslipidaemia and counseled against the use of alcohol and sedentary lifestyle.

Comorbidities in Androgenetic Alopecia: A Comprehensive Review

Androgenetic alopecia is the most common form of hair loss, affecting 85% of men and 40% of women. Androgenetic alopecia is a disease caused by multiple factors, such as genetics, hormones, and systemic diseases; however, the exact cause remains undetermined. Recent studies have found that it is associated with a high incidence of endocrine diseases and other comorbidities. It may not only be a skin disease but also an early signal of underlying systemic diseases. Effective management requires timely diagnosis and treatment initiation. However, in current clinical practice, androgenetic alopecia is still not fully understood or treated. Recognizing the true physical, social, and emotional burden of androgenic alopecia, as well as its associated comorbidities, is the first step in improving the prognosis of affected patients. This review aimed to gather the known pathological factors and provide a reference for clinical physicians to understand androgenetic alopecia and its comorbidities in depth, thereby enabling early recognition of the underlying systemic diseases and providing timely treatment.

Systematic Review and Meta-analysis of the Association Between Metabolic Syndrome and Androgenetic Alopecia

The association of androgenetic alopecia with metabolic syndrome has been investigated in several studies, with conflicting results. We conducted a meta-analysis to quantitatively evaluate the risk grade of metabolic syndrome and the metabolic profile in patients with androgenetic alopecia compared with controls. In total, 19 articles (2,531 participants) satisfied the inclusion criteria. The pooled odds ratio for the prevalence rate of metabolic syndrome between the group with androgenetic alopecia and controls was 3.46 (95% CI 2.38–5.05; p < 0.001). Female sex, early onset, and African ethnicity were associated with an increased risk of metabolic syndrome. Furthermore, patients with androgenetic alopecia had significantly poorer metabolic profiles, such as body mass index, waist circumference, fasting glucose, blood lipids, and blood pressure. It is important for physicians to screen metabolism-related indicators in patients with androgenetic alopecia. More rigorously designed studies and larger sample sizes are required in future studies.

YKL-40 A Sensitive Biomarker for Early Androgenetic Alopecia and Early Hidden Metabolic Syndrome

Background:

Androgenetic alopecia (AGA) is a common dermatological problem, Does the onset of the AGA matters in the general health? YKL 40 may have role in the pathogenesis of early AGA and associated metabolic syndrome (MS). YKL 40, released by many inflammatory cells and its biological role is not well known.

Aim of the Work:

The estimation of serum level of YKL-40 in patients with AGA to detect its role in AGA and MS pathogenesis, onset and severity.

Materials and Methods:

This case–control study, 100 individuals were enrolled in our study; 70 AGA patients and 30 healthy controls. We obtained an informed written consent from each individual prior the participation. AGA was diagnosed clinically, and onset was evaluated as early onset alopecia (by the age of 30 years or earlier), YKL-40 level was measured by ELISA technique.

Results:

Patients showed highly significant higher serum YKL-40 level more than that of the healthy subjects (P < 0.001). There was highly significant increase in YKL-40 level among early onset male and female cases compared to late onset cases (P < 0.001 each). There was significant increase in MS elements in AGA cases than controls (P < 0.05), and highly significant increase in MS associations and severity among early onset male and female cases compared to late onset cases (P < 0.001 each). AGA patients with MS showed highly significant higher serum YKL-40 level more than that without (P < 0.001). There was highly significant increase in YKL-40 level among early onset AGA with MS compared to late onset cases with MS (P < 0.001 each).

Conclusions:

High serum YKL-40 considered not only a biomarker of early onset AGA but also considered a potential sensitive predictor for early onset MS development and severity in patients with early onset AGA.

Metabolic Syndrome and Skin Diseases

The increasing prevalence of Metabolic syndrome (MetS) is a worldwide health problem, and the association between MetS and skin diseases has recently attracted growing attention. In this review, we summarize the associations between MetS and skin diseases, such as psoriasis, acne vulgaris, hidradenitis suppurativa, androgenetic alopecia, acanthosis nigricans, and atopic dermatitis. To discuss the potential common mechanisms underlying MetS and skin diseases, we focus on insulin signaling and insulin resistance, as well as chronic inflammation including adipokines and proinflammatory cytokines related to molecular mechanisms. A better understanding of the relationship between MetS and skin diseases contributes to early diagnosis and prevention, as well as providing clues for developing novel therapeutic strategies.