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Foo JC, Redler S, Forstner AJ, Basmanav FB, Pethukova L, Guo J, Streit F, Witt SH, Sirignano L, Zillich L, Avasthi S, Ripke S, Christiano AM, Tesch F, Schmitt J, Nöthen MM, Betz RC, Rietschel M, Frank J. Exploring the overlap between alopecia areata and major depressive disorder: Epidemiological and genetic perspectives. J Eur Acad Dermatol Venereol 2023. [PMID: 36695075 DOI: 10.1111/jdv.18921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 01/05/2023] [Indexed: 01/26/2023]
Abstract
BACKGROUND Research suggests that Alopecia areata (AA) and Major Depressive Disorder (MDD) show substantial comorbidity. To date, no study has investigated the hypothesis that this is attributable to shared genetic aetiology. OBJECTIVES To investigate AA-MDD comorbidity on the epidemiological and molecular genetic levels. METHODS First, epidemiological analyses were performed using data from a cohort of adult German health insurance beneficiaries (n = 1.855 million) to determine the population-based prevalence of AA-MDD comorbidity. Second, analyses were performed to determine the prevalence of MDD in a clinical AA case-control sample with data on psychiatric phenotypes, stratifying for demographic factors to identify possible contributing factors to AA-MDD comorbidity. Third, the genetic overlap between AA and MDD was investigated using a polygenic risk score (PRS) approach and linkage disequilibrium score (LDSC) regression. For PRS, summary statistics from a large MDD GWAS meta-analysis (PGC-MD2) were used as the training sample, while a Central European AA cohort, including the above-mentioned AA patients, and an independent replication US-AA cohort were used as target samples. LDSC was performed using summary statistics of PGC-MD2 and the largest AA meta-analysis to date. RESULTS High levels of AA-MDD comorbidity were reported in the population-based (MDD in 24% of AA patients), and clinical samples (MDD in 44% of AA patients). MDD-PRS explained a modest proportion of variance in AA case-control status (R2 = 1%). This signal was limited to the major histocompatibility complex (MHC) region on chromosome 6. LDSC regression (excluding MHC) revealed no significant genetic correlation between AA and MDD. CONCLUSIONS As in previous research, AA patients showed an increased prevalence of MDD. The present analyses suggest that genetic overlap may be confined to the MHC region, which is implicated in immune function. More detailed investigation is required to refine understanding of how the MHC is involved in the development of AA and MDD comorbidity.
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Affiliation(s)
- J C Foo
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - S Redler
- Institute of Human Genetics, Medical Faculty & University Hospital Bonn, University of Bonn, Bonn, Germany.,Institute of Human Genetics, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - A J Forstner
- Institute of Human Genetics, Medical Faculty & University Hospital Bonn, University of Bonn, Bonn, Germany.,Institute of Neuroscience and Medicine (INM-1), Research Center Jülich, Jülich, Germany
| | - F B Basmanav
- Institute of Human Genetics, Medical Faculty & University Hospital Bonn, University of Bonn, Bonn, Germany
| | - L Pethukova
- Department of Dermatology, Columbia University, New York City, New York, USA.,Department of Epidemiology, Columbia University, New York City, New York, USA
| | - J Guo
- Department of Biostatistics, Columbia University, New York City, New York, USA
| | - F Streit
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - S H Witt
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - L Sirignano
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - L Zillich
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - S Avasthi
- Laboratory for Statistical Genetics, Charité University Hospital Berlin, Berlin, Germany
| | - S Ripke
- Laboratory for Statistical Genetics, Charité University Hospital Berlin, Berlin, Germany
| | - A M Christiano
- Department of Genetics and Development, Columbia University, New York City, New York, USA
| | - F Tesch
- Center for Evidence-Based Healthcare, University Hospital Carl Gustav Carus and Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - J Schmitt
- Center for Evidence-Based Healthcare, University Hospital Carl Gustav Carus and Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - M M Nöthen
- Institute of Human Genetics, Medical Faculty & University Hospital Bonn, University of Bonn, Bonn, Germany
| | - R C Betz
- Institute of Human Genetics, Medical Faculty & University Hospital Bonn, University of Bonn, Bonn, Germany
| | - M Rietschel
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - J Frank
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
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Sidi Omar SFN, Ngui R, Ab Rahman SZ, Foo JC, Wang QY, Hassan NA, Lim YAL, Musa S. Oral bacteria detection among children with cancer in a tertiary teaching hospital in Kuala Lumpur, Malaysia. Trop Biomed 2021; 38:276-282. [PMID: 34362870 DOI: 10.47665/tb.38.3.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study sought to determine the prevalence of pathogenic and non-pathogenic bacteria in the oral cavities of children with cancer. There were 68 paediatric patients with cancer who were included in this study. Oral swab samples from the dorsum of tongues and mouth floors of these patients were subjected to culture, staining, and molecular methods to detect the bacteria. The overall prevalence of gram-positive and gram-negative bacteria was 79.4% (54/68; 95% CI = 68.4 - 87.3) and 25% (17/68; 95% CI = 16.2 - 36.4), respectively. Streptococcus salivarius and Streptococcus parasanguinis were the predominant pathogenic grampositive bacteria, while Neisseria subflava and Neisseria perflava were the most common pathogenic gram-negative bacteria. The results revealed that the number of bacteria isolates recovered in patients receiving cancer treatment was higher (55.9%) than those who had not received treatment (16.2%). Therefore, more isolated pathogenic bacteria were observed post-therapy (54.4%). Pathogenic organisms can have significant implications on patient health. Awareness of the types of bacteria inhabiting the oral cavity is essential to predict and prevent dental problems, and their associated systemic complications. Findings on the diversity of oral microflora can also provide a better understanding of the aetiology of oral diseases in paediatric patients receiving cancer treatment.
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Affiliation(s)
- S F N Sidi Omar
- Department of Parasitology, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - R Ngui
- Department of Parasitology, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - S Z Ab Rahman
- Department of Paediatrics, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - J C Foo
- Department of Paediatrics, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Q Y Wang
- Department of Paediatrics, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - N A Hassan
- Department of Parasitology, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Y A L Lim
- Department of Parasitology, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - S Musa
- Department of Paediatric Dentistry & Orthodontics, Faculty of Dentistry, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
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