1
|
Krueger JG, Frew J, Jemec GBE, Kimball AB, Kirby B, Bechara FG, Navrazhina K, Prens E, Reich K, Cullen E, Wolk K. Hidradenitis suppurativa: new insights into disease mechanisms and an evolving treatment landscape. Br J Dermatol 2024; 190:149-162. [PMID: 37715694 DOI: 10.1093/bjd/ljad345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 09/08/2023] [Accepted: 09/11/2023] [Indexed: 09/18/2023]
Abstract
Hidradenitis suppurativa (HS), also known as acne inversa, is a chronic disabling and debilitating inflammatory disease with a high unmet medical need. The prevalence of HS reported in most studies is 1-2%, although it is likely to be under-reported and estimates vary globally owing to variance in data collection methods, ethnicity, geographical location and under-diagnosis. HS is characterized by persistent, painful cutaneous nodules, abscesses and draining tunnels commonly affecting the axillary, anogenital, inguinal and perianal/gluteal areas. Over time, chronic uncontrolled inflammation results in irreversible tissue destruction and scarring. Although the pathophysiology of HS has not been fully elucidated, the tumour necrosis factor (TNF)-α and interleukin (IL)-17 pathways have an important role, involving multiple cytokines. Currently, treatment options include topical medications; systemic therapies, including repeated and/or rotational courses of systemic antibiotics, retinoids and hormonal therapies; and various surgical procedures. The anti-TNF-α antibody adalimumab is currently the only biologic approved by both the US Food and Drug Administration and the European Medicines Agency for HS; however, its efficacy varies, with a clinical response reported in approximately 50% of patients in phase III trials. HS is a rapidly evolving field of discovery, with a diverse range of agents with distinct mechanisms of action currently being explored in clinical trials. Several other promising therapeutic targets have recently emerged, and agents targeting the IL-17 and Janus kinase (JAK)/signal transducer and activator of transcription (STAT) pathways are the most advanced in ongoing or completed phase III clinical trials. Alongside limited therapeutic options, significant challenges remain in terms of diagnosis and disease management, with a need for better treatment outcomes. Other unmet needs include significant diagnostic delays, thus missing the therapeutic 'window of opportunity'; the lack of standardized outcome measures in clinical trials; and the lack of established, well-defined disease phenotypes and biomarkers.
Collapse
Affiliation(s)
- James G Krueger
- Laboratory of Investigative Dermatology, The Rockefeller University, New York, NY, USA
| | - John Frew
- Laboratory of Translational Cutaneous Medicine, Ingham Institute for Applied Medical Research, Sydney, Australia
- Department of Dermatology, Liverpool Hospital, Sydney, Australia
- University of New South Wales, Sydney, Australia
| | - Gregor B E Jemec
- Department of Dermatology, Zealand University Hospital, Roskilde, Denmark
- Health Sciences Faculty, University of Copenhagen, Copenhagen, Denmark
| | - Alexa B Kimball
- Department of Dermatology, Harvard Medical School, Boston, MA, USA
- Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Brian Kirby
- Charles Department of Dermatology, St Vincent's University Hospital, Dublin, Ireland
- Charles Institute of Dermatology, University College Dublin, Dublin, Ireland
| | - Falk G Bechara
- Department of Dermatology, Venereology and Allergology, Ruhr-University Bochum, Bochum, Germany
| | - Kristina Navrazhina
- Laboratory of Investigative Dermatology, The Rockefeller University, New York, NY, USA
- Weill Cornell/Rockefeller/Sloan Kettering Tri-Institutional MD-PhD Program, New York, NY, USA
| | - Errol Prens
- Department of Dermatology, Erasmus University Medical Center, Rotterdam, TheNetherlands
| | - Kristian Reich
- Translational Research in Inflammatory Skin Diseases, Institute for Health Care Research in Dermatology and Nursing, University Medical Center Hamburg-Eppendorf, Germany
- MoonLake Immunotherapeutics AG, Zug, Switzerland
| | - Eva Cullen
- MoonLake Immunotherapeutics AG, Zug, Switzerland
| | - Kerstin Wolk
- Psoriasis Research and Treatment Centre, Department of Dermatology, Venereology and Allergology and Institute of Medical Immunology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| |
Collapse
|
2
|
Liao YH, Chu CB, Hui CYR, Li CY, Lin SY, Tseng HC, Wang YJ, Wu J, Yu WW, Chao SC. Taiwanese Dermatological Association (TDA) consensus recommendations for the definition, classification, diagnosis, and management of hidradenitis suppurativa. J Formos Med Assoc 2023:S0929-6646(23)00492-8. [PMID: 38160191 DOI: 10.1016/j.jfma.2023.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 11/12/2023] [Accepted: 12/17/2023] [Indexed: 01/03/2024] Open
Abstract
Hidradenitis suppurativa (HS) is a chronic inflammatory follicular disease characterized by painful, recurrent, inflamed lesions most commonly occurring in the axillary, inguinal, and anogenital regions. HS can inflict immense physical and psychological impact on patients who suffer from this distressing disease. Management of HS generally requires combining various medical and procedural treatment modalities; however, the disease is often recalcitrant to conventional treatments. In light of recent evidence supporting the effectiveness of biologic agents in the treatment of HS, the Taiwanese Dermatological Association established an expert panel of nine dermatologists to develop consensus statements aimed to provide up-to-date evidence-based guidance in optimizing HS patient management in Taiwan. The recommendations described in the statements were summarized in a management algorithm in terms of general care, topical treatment, systemic treatment, and procedural treatment.
Collapse
Affiliation(s)
- Yi-Hua Liao
- Department of Dermatology, National Taiwan University Hospital, Taipei, Taiwan; College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chia-Bao Chu
- Department of Dermatology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | | | - Cheng-Yuan Li
- Department of Dermatology, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Dermatology, College of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Sheng-Yao Lin
- Department of Dermatology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Han-Chi Tseng
- Department of Dermatology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan; Graduate Institute of Clinical Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yen-Jen Wang
- Department of Dermatology, MacKay Memorial Hospital, Taipei, Taiwan; Department of Cosmetic Applications and Management, MacKay Junior College of Medicine, Nursing, and Management, New Taipei City, Taiwan
| | - Jennifer Wu
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Wei-Wen Yu
- Department of Dermatology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Sheau-Chiou Chao
- Department of Dermatology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
| |
Collapse
|
3
|
Mintoff D, Agius R, Benhadou F, Das A, Frew JW, Pace NP. Obesity and hidradenitis suppurativa: targeting meta-inflammation for therapeutic gain. Clin Exp Dermatol 2023; 48:984-990. [PMID: 37171791 DOI: 10.1093/ced/llad182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/24/2023] [Accepted: 05/08/2023] [Indexed: 05/13/2023]
Abstract
Hidradenitis suppurativa (HS) is a chronic, inflammatory condition of the pilosebaceous unit. The typical patient with HS is characterized as someone with obesity, who smokes and who has nodules, abscesses and/or draining tunnels predominantly distributed in intertriginous skin. It has been established that lifestyle and genetic factors are the main pathophysiological drivers of HS. In this critical review, we explore the interrelatedness of meta-inflammation, obesity and HS and discuss if and how this relationship may be manipulated for a therapeutic end.
Collapse
Affiliation(s)
- Dillon Mintoff
- Department of Dermatology
- Department of Pathology, Faculty of Medicine and Surgery
| | - Rachel Agius
- Diabetes and Endocrine Centre, Mater Dei Hospital, Msida, Malta
- Faculty of Medicine and Surgery
| | - Farida Benhadou
- Department of Dermatology, Hôpital Erasme, Universite Libre de Bruxelles, Bruxelles, Belgium
| | - Anupam Das
- Department of Dermatology, Venereology and Leprosy; KPC Medical College & Hospital, Kolkata, India
| | - John W Frew
- Laboratory of Translational Cutaneous Medicine, Ingham Institute for Applied Medical Research, Sydney, NSW, Australia
- Department of Dermatology, Liverpool Hospital, Sydney, NSW, Australia
- University of New South Wales, Sydney, NSW, Australia
| | - Nikolai P Pace
- Faculty of Medicine and Surgery
- Centre for Molecular Medicine and Biobanking, University of Malta, Msida, Malta
| |
Collapse
|
4
|
Alhusain AM, Almosa AS, Alqirnas MQ, Alissa SI. Submental liposuction with VASER complicated with hidradenitis suppurativa in neck area: a case report. J Surg Case Rep 2023; 2023:rjad318. [PMID: 37397067 PMCID: PMC10308003 DOI: 10.1093/jscr/rjad318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 05/01/2023] [Indexed: 07/04/2023] Open
Abstract
Hidradenitis suppurativa (HS) is a chronic inflammatory disorder that is characterized by deep-seated painful nodules, classically in the intertriginous skin and apocrine gland-rich areas of the body such as the anogenital, axillary, inframammary and inguinal regions. This is a case of a 35-year-old female, who is known to have gluteal HS, she underwent neck liposuction procedure that was then complicated by anterior neck HS, which is considered as an atypical location. The patient received medical treatment with antibiotics and showed huge improvement. In addition, in patients who do not show response to medical therapy, surgical treatment is usually carried out by incising the area affected and leaving the wound open to be healed by secondary intention or covering it with a skin graft if the area is extensive.
Collapse
Affiliation(s)
- Abdullah M Alhusain
- Correspondence address. Plastic and Reconstructive Surgery Division, Surgery Department, Ministry of National Guards Health Affairs, King Abdullah Children's Specialist Hospital, P.O. Box 22490 Riyadh 14611, Saudi Arabia. Tel: +966-11-8011111; Fax: +966-11-8011000; E-mail:
| | - Abdulaziz S Almosa
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Muhannad Q Alqirnas
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Sami I Alissa
- Plastic and Reconstructive Surgery Division, Surgery Department, Security Forces hospital, Riyadh, Saudi Arabia
| |
Collapse
|
5
|
Hidradenitis Suppurativa Burdens on Mental Health: A Literature Review of Associated Psychiatric Disorders and Their Pathogenesis. LIFE (BASEL, SWITZERLAND) 2023; 13:life13010189. [PMID: 36676137 PMCID: PMC9865498 DOI: 10.3390/life13010189] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/01/2023] [Accepted: 01/03/2023] [Indexed: 01/11/2023]
Abstract
Skin, mental health and the central nervous system (CNS) are connected by a deep link. It is not only the aesthetic and sometimes the disfiguring aspects of dermatological conditions that can cause a severe psychological burden; also, different studies have shown how chronic skin-inflammatory diseases may influence the activity of the CNS and vice versa. Moreover, the skin and brain share a common embryogenic origin. Hidradenitis suppurativa (HS) is a chronic inflammatory skin disease affecting the hair follicles of the apocrine regions. The main clinical features are nodules, abscesses, cysts, fistulae and disfiguring scars. Pain and stinking discharge from fistulae are often present. It is not surprising that the psychological burden associated with HS is frequently a challenge in dermatologists' daily routines. Patients often suffer from depression and anxiety, but also from substance abuse, psychotic and bipolar disorders and an increased suicide risk. The aim of this article is to review the main psychiatric disorders associated with HS and their pathophysiology. Research on Pubmed was conducted with the key words Hidradenitis suppurativa, psychiatric, depression, anxiety, bipolar, schizophrenia, abuse, suicidal. A high incidence of psychiatric disorders has been described in HS compared to controls. Hidradenitis suppurativa is not a rare disease, and acknowledging the HS psychological burden, psychiatric-associated diseases and associated biomolecular pathways will help dermatologists to better care for their patients.
Collapse
|
6
|
Alotaibi HM. Incidence, Risk Factors, and Prognosis of Hidradenitis Suppurativa Across the Globe: Insights from the Literature. Clin Cosmet Investig Dermatol 2023; 16:545-552. [PMID: 36891064 PMCID: PMC9987236 DOI: 10.2147/ccid.s402453] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 02/22/2023] [Indexed: 03/06/2023]
Abstract
Hidradenitis suppurativa, a chronic inflammatory disease of the skin, affects a patient's quality of life to a greater extent. While the disease burden, including its incidence and prevalence, has been extensively studied in the western population, there is a paucity of data from developing countries on the epidemiology of Hidradenitis suppurativa. Therefore, a general literature review was conducted to shed light on the epidemiology of Hidradenitis suppurativa across the globe. We reviewed the most recently available information on epidemiology, including incidence, prevalence, risk factors, prognosis and quality of life, complications, and associated comorbid among patients with Hidradenitis suppurativa. The estimated global prevalence of Hidradenitis suppurativa is found to be 0.00033-4.1%, with a relatively higher prevalence of 0.7-1.2% in European and US populations. Both genetic and environmental factors are associated with Hidradenitis suppurativa. Patients with Hidradenitis suppurativa have associated comorbid such as cardiovascular disease, type II diabetes mellitus, mental health issues, and sleep and sexual dysfunctions. These patients spend poor quality of life and tend to be less productive. Future studies are needed to assess the burden of Hidradenitis suppurativa in developing countries. Since the disease tends to be underdiagnosed, future studies should rely on clinical diagnosis rather than self-reporting to avoid the potential of recall bias. Attention needs to be diverted to developing countries with less amount of data on Hidradenitis suppurativa.
Collapse
Affiliation(s)
- Hend M Alotaibi
- Dermatology Department, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia
| |
Collapse
|
7
|
Hidradenitis Suppurativa: The Influence of Gender, the Importance of Trigger Factors and the Implications for Patient Habits. Biomedicines 2022; 10:biomedicines10112973. [PMID: 36428540 PMCID: PMC9687269 DOI: 10.3390/biomedicines10112973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/31/2022] [Accepted: 11/08/2022] [Indexed: 11/22/2022] Open
Abstract
Hidradenitis suppurativa (HS) is a debilitating, chronic, inflammatory skin disease primarily affecting apocrine gland-rich areas of the body. On the one hand, the presence of triggering factors-some identified, others only hypothesized-may initiate or perpetuate the pathogenic process of HS. In addition to cigarette smoking and diet, other trigger factors, including choice of clothing, are frequently observed in clinical practice. On the other hand, the presence of disease may influence habits of HS patients. Indeed, high incidences of sexual and sleep impairment have been reported in these patients. Consequently, alcohol and substance abuse may be a coping strategy for the emotional and psychological disease burden. Furthermore, a greater awareness of gender differences in HS may be important for dermatologists in their own clinical practice (i.e., pregnancy and breastfeeding). Consequently, in this loop interaction, comprehensive knowledge of all factors involved is crucial for the management of HS patients. Thus, the objective of this review is to (i) discuss the influence of gender on HS, (ii) summarize the most frequent triggering factors of HS and (iii) analyze the impact of HS on patient habits.
Collapse
|
8
|
Friction-Aggravated Skin Disorders-A Review of Mechanism and Related Diseases. Dermatitis 2022:01206501-990000000-00081. [PMID: 36255396 DOI: 10.1097/der.0000000000000961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
ABSTRACT Skin is subject to frequent friction injury. Friction affects different structures of the skin, including keratinocytes, melanocytes, fibroblasts, and follicular units. Friction can also stimulate cytokine production. Friction is sensed by the mechanoreceptors, resulting in signal transduction to the nucleus, activating transcription factors and mechanoresponsive genes. Numerous friction-aggravated diseases have been identified, including inflammatory, depositional, follicular, genetic, infectious, and vesiculobullous disorders. Friction, as a potential modifiable aggravator, should be considered when skin diseases are located at friction-prone areas.
Collapse
|
9
|
Dharmadji HP, Arianto TR, Sugiri U, Sutedja EK, Achdiat PA, Tsaqilah L, Gunawan H. Intermammary Hidradenitis Suppurativa: A Case Report. Int Med Case Rep J 2022; 15:163-167. [PMID: 35431584 PMCID: PMC9012303 DOI: 10.2147/imcrj.s358514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 03/25/2022] [Indexed: 11/29/2022] Open
Abstract
Hidradenitis suppurativa (HS) is a chronic relapsing inflammatory skin disease clinically characterized by recurrent, deep-seated, painful, subcutaneous nodules, sinus tracts, and hypertrophic scarring. This disease affects hair follicles in the apocrine gland-bearing areas such as the axillae, buttocks, as well as the genital and perineal areas. In women, the predilection sites of HS include the anterior part of the body, most commonly on the breasts, inframammary area, and groin. Intermammary location possibly represents a rare phenotype presentation. A case of intermammary HS in a 24-year-old woman was reported. The patient is overweight and is a smoker. Frequent friction and excessive sweating between big breasts were admitted. Chronic painful nodules accompanied by sinuses and scars between the breasts were found. Histopathological examination from a skin lesion on the intermammary area showed follicular occlusion, follicular hyperkeratosis, and destroyed hair follicles. There were also apocrine glands and hair follicles surrounded by massive neutrophils, lymphocytes, and histiocytes, suggestive of HS. The patient was given rifampicin and clindamycin. Clinical improvements were observed on the third week of observation. Typical lesion distribution is one of the criteria for establishing a definite diagnosis of HS. If the lesion is on an atypical site, it must be accompanied by at least one on the typical site. However, the predilection sites of HS often varied. The intermammary area is an intertriginous area, and mechanical friction, follicular occlusion, and rupture of the dilated follicles may contribute to the development of HS in the area. The existence of a typical lesion in an atypical distribution, without any lesion present in typical predilection sites, cannot rule out diagnostic consideration of HS. Therefore, clinicians should be aware and consider the diagnosis of HS even when the required criteria of HS are not fulfilled.
Collapse
Affiliation(s)
- Hartati Purbo Dharmadji
- Department of Dermatology and Venereology, Faculty of Medicine, Universitas Padjadjaran - Hasan Sadikin General Hospital, Bandung, Indonesia
- Correspondence: Hartati Purbo Dharmadji, Department of Dermatology and Venereology, Faculty of Medicine, Universitas Padjadjaran - Dr Hasan Sadikin General Hospital, Jl. Pasteur No. 38, Bandung, 40161, West Java, Indonesia, Tel +62 222032426 ext. 3449, Fax +62 222032426, Email
| | - Tiara Rachmaputeri Arianto
- Department of Dermatology and Venereology, Faculty of Medicine, Universitas Padjadjaran - Hasan Sadikin General Hospital, Bandung, Indonesia
| | - Unwati Sugiri
- Department of Dermatology and Venereology, Faculty of Medicine, Universitas Padjadjaran - Hasan Sadikin General Hospital, Bandung, Indonesia
| | - Eva Krishna Sutedja
- Department of Dermatology and Venereology, Faculty of Medicine, Universitas Padjadjaran - Hasan Sadikin General Hospital, Bandung, Indonesia
| | - Pati Aji Achdiat
- Department of Dermatology and Venereology, Faculty of Medicine, Universitas Padjadjaran - Hasan Sadikin General Hospital, Bandung, Indonesia
| | - Laila Tsaqilah
- Department of Dermatology and Venereology, Faculty of Medicine, Universitas Padjadjaran - Hasan Sadikin General Hospital, Bandung, Indonesia
| | - Hendra Gunawan
- Department of Dermatology and Venereology, Faculty of Medicine, Universitas Padjadjaran - Hasan Sadikin General Hospital, Bandung, Indonesia
| |
Collapse
|
10
|
Kjærsgaard Andersen R, Strunk A, Tannenbaum R, Boer J, Garg A, Jemec G. Prevalence of Marfan syndrome, Ehlers-Danlos syndrome, and osteogenesis imperfecta in patients with hidradenitis suppurativa. J Am Acad Dermatol 2021; 86:471-474. [PMID: 34592380 DOI: 10.1016/j.jaad.2021.09.047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 07/02/2021] [Accepted: 09/10/2021] [Indexed: 11/28/2022]
Affiliation(s)
| | - Andrew Strunk
- Department of Dermatology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New Hyde Park, New York
| | - Rachel Tannenbaum
- Department of Dermatology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New Hyde Park, New York
| | - Jurr Boer
- Department of Dermatology, Deventer Hospital, Deventer, the Netherlands
| | - Amit Garg
- Department of Dermatology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New Hyde Park, New York
| | - Gregor Jemec
- Department of Dermatology, Zealand University Hospital, Roskilde, Denmark; Health Sciences Faculty, University of Copenhagen, Denmark
| |
Collapse
|
11
|
Kjaersgaard Andersen R, Clemmensen SB, Larsen LA, Hjelmborg JVB, Ødum N, Jemec GBE, Christensen K. Evidence of gene-gene interaction in Hidradenitis suppurativa - A nationwide register study of Danish twins. Br J Dermatol 2021; 186:78-85. [PMID: 34289077 DOI: 10.1111/bjd.20654] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/15/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Hidradenitis suppurativa (HS) is a recurrent inflammatory skin disease that, apart from rare causative loss-of-function mutations, has a widely unknown genetic aetiology. Our objective was to estimate the relative importance of genetic and environmental factors underlying HS susceptibility. METHODS Through the Danish Twin Registry and the Danish National Patient Registry we joined information on zygosity with that of HS status. HS cases were identified by International Code of Diseases 8 (705.91) and 10 (L73.2). Heritability was assessed by the classic biometric model and the possibility of gene-gene interaction through the multi-locus modeling approach. RESULTS Amongst 100,044 registered twins, we found 170 twins (from 163 pairs) diagnosed with HS. The seven concordant pairs were all monozygotic, and monozygotic twins had a casewise concordance rate of 28% (95% CI: 7%; 49%), corresponding to a familial risk of 73 (95% CI 13; 133) times that of the background population. The biometrical modelling suggested a heritability of 0.80 (95% CI 0.67; 0.93), and the multilocus index estimate was 230 (95% CI: 60; 400). This is highly indicative of gene-gene interactions, with the possibility of up to six interacting loci. CONCLUSION This twin study is substantially larger, and employs a more valid phenotype than prior studies. Genetics account for the majority of the HS susceptibility, and HS is most likely caused by gene-gene interactions rather than monogenetic mutations or solely additive genetic factors. New approaches aimed at assessing potential interactions at a SNP-SNP level should be implemented in future HS genome-wide association studies.
Collapse
Affiliation(s)
| | - S B Clemmensen
- Danish Twin Registry, Department of Epidemiology, Biostatistics and Biodemography, University of southern Denmark, Odense, Denmark
| | - L A Larsen
- Danish Twin Registry, Department of Epidemiology, Biostatistics and Biodemography, University of southern Denmark, Odense, Denmark
| | - J V B Hjelmborg
- Danish Twin Registry, Department of Epidemiology, Biostatistics and Biodemography, University of southern Denmark, Odense, Denmark
| | - N Ødum
- LEO Foundation Skin Immunology Research Center, Department of Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
| | - G B E Jemec
- Department of Dermatology, Zealand University Hospital, Roskilde
| | - K Christensen
- Danish Twin Registry, Department of Epidemiology, Biostatistics and Biodemography, University of southern Denmark, Odense, Denmark
| |
Collapse
|
12
|
Benhadou F, Guillem P. Do collagen-related diseases represent a risk factor for hidradenitis suppurativa? Exp Dermatol 2021; 30:872-873. [PMID: 33492758 DOI: 10.1111/exd.14290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/12/2021] [Accepted: 01/20/2021] [Indexed: 11/29/2022]
Affiliation(s)
- Farida Benhadou
- Department of Dermatology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium.,ResoVerneuil, Paris, France.,European Hidradenitis Suppurativa Foundation e.V, Dessau, Germany
| | - Philippe Guillem
- ResoVerneuil, Paris, France.,European Hidradenitis Suppurativa Foundation e.V, Dessau, Germany.,Department of Surgery, Clinique du Val d'Ouest, Lyon, France
| |
Collapse
|