1
|
Melnik BC. Acne Transcriptomics: Fundamentals of Acne Pathogenesis and Isotretinoin Treatment. Cells 2023; 12:2600. [PMID: 37998335 PMCID: PMC10670572 DOI: 10.3390/cells12222600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 11/05/2023] [Accepted: 11/08/2023] [Indexed: 11/25/2023] Open
Abstract
This review on acne transcriptomics allows for deeper insights into the pathogenesis of acne and isotretinoin's mode of action. Puberty-induced insulin-like growth factor 1 (IGF-1), insulin and androgen signaling activate the kinase AKT and mechanistic target of rapamycin complex 1 (mTORC1). A Western diet (hyperglycemic carbohydrates and milk/dairy products) also co-stimulates AKT/mTORC1 signaling. The AKT-mediated phosphorylation of nuclear FoxO1 and FoxO3 results in their extrusion into the cytoplasm, a critical switch which enhances the transactivation of lipogenic and proinflammatory transcription factors, including androgen receptor (AR), sterol regulatory element-binding transcription factor 1 (SREBF1), peroxisome proliferator-activated receptor γ (PPARγ) and signal transducer and activator of transcription 3 (STAT3), but reduces the FoxO1-dependent expression of GATA binding protein 6 (GATA6), the key transcription factor for infundibular keratinocyte homeostasis. The AKT-mediated phosphorylation of the p53-binding protein MDM2 promotes the degradation of p53. In contrast, isotretinoin enhances the expression of p53, FoxO1 and FoxO3 in the sebaceous glands of acne patients. The overexpression of these proapoptotic transcription factors explains isotretinoin's desirable sebum-suppressive effect via the induction of sebocyte apoptosis and the depletion of BLIMP1(+) sebocyte progenitor cells; it also explains its adverse effects, including teratogenicity (neural crest cell apoptosis), a reduced ovarian reserve (granulosa cell apoptosis), the risk of depression (the apoptosis of hypothalamic neurons), VLDL hyperlipidemia, intracranial hypertension and dry skin.
Collapse
Affiliation(s)
- Bodo C Melnik
- Department of Dermatology, Environmental Medicine and Health Theory, University of Osnabrück, 49069 Osnabrück, Germany
| |
Collapse
|
2
|
Xie Y, Liu B, Wu Z. Segmental hypopigmented acneiform nevus with FGFR2 gene mutation. An Bras Dermatol 2023; 98:710-712. [PMID: 37183147 PMCID: PMC10404498 DOI: 10.1016/j.abd.2021.09.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 09/21/2021] [Accepted: 09/23/2021] [Indexed: 05/16/2023] Open
Affiliation(s)
- Yongyi Xie
- Department of Dermatology, Shanghai General Hospital, Shanghai, China; Department of Dermatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Baoyi Liu
- Department of Dermatology, Shanghai General Hospital, Shanghai, China; Department of Dermatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhouwei Wu
- Department of Dermatology, Shanghai General Hospital, Shanghai, China; Department of Dermatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| |
Collapse
|
3
|
Su Z, Zhang Y, Cao J, Sun Y, Cai Y, Zhang B, He L, Zhang Z, Xie J, Meng Q, Luo L, Li F, Li J, Zhang J, Chen X, Hong A. Hyaluronic acid-FGF2-derived peptide bioconjugates for suppression of FGFR2 and AR simultaneously as an acne antagonist. J Nanobiotechnology 2023; 21:55. [PMID: 36803994 PMCID: PMC9938603 DOI: 10.1186/s12951-023-01812-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 02/10/2023] [Indexed: 02/19/2023] Open
Abstract
Acne is a chronic skin condition that has serious consequences for mental and social well-being because it frequently occurs on the face. Several acne treatment approaches have commonly been used but have been hampered by side effects or weak activity. Thus, the investigation of the safety and efficacy of anti-acne compounds is of considerable medical importance. Herein, an endogenous peptide (P5) derived from fibroblast growth factors 2 (FGF2) was conjugated to the polysaccharide hyaluronic acid (HA) to generate the bioconjugate nanoparticle HA-P5, which suppresses fibroblast growth factor receptors (FGFRs) to significantly rehabilitate acne lesions and reduce sebum accumulation in vivo and in vitro. Moreover, our results show that HA-P5 inhibits both fibroblast growth factor receptor 2 (FGFR2) and androgen receptor (AR) signalling in SZ95 cells, reverses the acne-prone transcriptome, and decreases sebum secretion. Furthermore, the cosuppression mechanism revealed that HA-P5 blocks FGFR2 activation, as well as the YTH N6-methyladenosine RNA binding protein F3 (YTHDF3) downstream molecules, including an N6-methyladenosine (m6A) reader that facilitates AR translation. More importantly, a significant difference between HA-P5 and the commercial FGFR inhibitor AZD4547 is that HA-P5 does not trigger the overexpression of aldo-keto reductase family 1 member C3 (AKR1C3), which blocks acne treatment by catalyzing the synthesis of testosterone. Overall, we demonstrate that a polysaccharide-conjugated and naturally derived oligopeptide HA-P5 can alleviate acne and act as an optimal FGFR2 inhibitor and reveal that YTHDF3 plays a crucial role in signalling between FGFR2 and AR.
Collapse
Affiliation(s)
- Zijian Su
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Yibo Zhang
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Jieqiong Cao
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
- The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
| | - Yuanmeng Sun
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Yuling Cai
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Bihui Zhang
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Liu He
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Zilei Zhang
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Junye Xie
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Qilin Meng
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Lin Luo
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Fu Li
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Jingsheng Li
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Jinting Zhang
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China
| | - Xiaojia Chen
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China.
| | - An Hong
- Department of Cell Biology, College of Life Science and Technology, Jinan University; National Engineering Research Center of Genetic Medicine; Guangdong Provincial Key Laboratory of Bioengineering Medicine; Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, Jinan University, Guangzhou, 510632, Guangdong, China.
| |
Collapse
|
4
|
Deng Q, Li Y, Liu Z, Zhou J, Weng L. Epidermal nevus syndrome with the mutation of PTCH1 gene and cerebral infarction: a case report and review of the literature. J Med Case Rep 2022; 16:343. [PMID: 36171624 PMCID: PMC9520847 DOI: 10.1186/s13256-022-03547-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 07/27/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Epidermal nevus syndrome is a group of congenital neuroectodermal and/or mesodermal disorders characterized by the epidermal nevi in common association with cerebral, eye, skeletal, cardiovascular, and renal abnormalities. Epidermal nevus syndrome is a rare syndrome, and epidermal nevus syndrome with the mutation of PTCH1 gene and cerebral infarction is even rarer and has not been reported to the best of our knowledge. CASE PRESENTATION We report the case of a 10-month-old Chinese female patient who presented to our pediatric neurologic department, University of Wenzhou medical teaching Hospital, Hangzhou. She has mobility disorders on the right limbs and recurrent seizures. She had congenital disorder accompanied by brownish-black and verrucose plaques on the right side of the face as well as extensive brownish-black plaques and brown nevi on the right side of the trunk and the right arm. Epidermal nevus syndrome was diagnosed on the basis of her symptoms. Somatic sebaceous nevi and hypoplastic defects of skin, cerebra, eyes, skeleton, and cardiovascular and renal system were observed. However, in addition to the typical clinical characteristics, the patient also has a mutation (c.109G > T) in PTCH1 gene and cerebral infarction. We present a novel case report and literature review. CONCLUSION To our knowledge, epidermal nevus syndrome with a mutation of PTCH1 gene and cerebral infarction has not been reported previously. This case report may contribute to characterizing the phenotype of epidermal nevus syndrome, help clinicians be aware of the association of this condition with PTCH1 gene and cerebral infarction, raise clinical suspicion, and improve early therapy.
Collapse
Affiliation(s)
- QingQing Deng
- Department of Pediatrics, Hangzhou Children's Hospital, 195 Wenhui Road, Hangzhou, 310014, Zhejiang, People's Republic of China.
| | - Yan Li
- Department of Pediatrics, Hangzhou Children's Hospital, 195 Wenhui Road, Hangzhou, 310014, Zhejiang, People's Republic of China
| | - ZhanLi Liu
- Department of Pediatrics, Hangzhou Children's Hospital, 195 Wenhui Road, Hangzhou, 310014, Zhejiang, People's Republic of China
| | - JieLin Zhou
- Department of Pediatrics, Hangzhou Children's Hospital, 195 Wenhui Road, Hangzhou, 310014, Zhejiang, People's Republic of China
| | - LingWei Weng
- Department of Pediatrics, Hangzhou Children's Hospital, 195 Wenhui Road, Hangzhou, 310014, Zhejiang, People's Republic of China
| |
Collapse
|
5
|
Zhou LF, Lu R. Compound-honeysuckle-induced drug eruption with special manifestations: A case report. World J Clin Cases 2022; 10:8018-8024. [PMID: 36158492 PMCID: PMC9372860 DOI: 10.12998/wjcc.v10.i22.8018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 06/22/2022] [Accepted: 06/30/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The clinical manifestations of drug eruption are complex and diverse, which can lead to missed diagnosis or misdiagnosis. The clinical manifestations of drug eruption caused by compound honeysuckle have not been reported.
CASE SUMMARY A 20-year-old man was admitted to our department of dermatology due to erythema and papules on the chest and abdomen with pruritus for 3 d. The next day after taking compound honeysuckle granules, the patient suddenly developed a rash and intense itching on his chest and abdomen. Physical examination revealed diffuse red needle-cap size macules and papules with well-defined borders on the chest and abdomen, and discoloration after finger pressure. No abnormality was observed in other areas of the skin. Back skin scratch was positive. White blood cells, eosinophil count and eosinophil ratio were higher than normal. Histopathological examination of the skin lesions on the left abdomen revealed intercellular edema, blurred focal basal cell layers, and focal lymphocyte infiltration in the superficial dermis and perivascular areas. Immunohistochemistry showed CD3+, CD4+ and CD8+ T lymphocytes. The diagnosis was drug eruption with special manifestations induced by compound honeysuckle. The skin lesions completely subsided without pruritus after 2 wk of antihistamine and hormone therapy. Follow-up for > 1 mo showed no recurrence.
CONCLUSION Chinese patent medicine compound honeysuckle granules can induce allergic reaction and rare skin damage.
Collapse
Affiliation(s)
- Li-Feng Zhou
- Department of Dermatology, The 942nd Hospital of the People's Liberation Army Joint Logistic Support Force, Yinchuan 750004, Ningxia Hui Autonomous Region, China
| | - Rong Lu
- Department of Pathology, The 942nd Hospital of the People's Liberation Army Joint Logistic Support Force, Yinchuan 750004, Ningxia Hui Autonomous Region, China
| |
Collapse
|
6
|
Baroud S, Wu J, Zouboulis CC. Acne Syndromes and Mosaicism. Biomedicines 2021; 9:biomedicines9111735. [PMID: 34829964 PMCID: PMC8615598 DOI: 10.3390/biomedicines9111735] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/14/2021] [Accepted: 11/19/2021] [Indexed: 01/14/2023] Open
Abstract
Abnormal mosaicism is the coexistence of cells with at least two genotypes, by the time of birth, in an individual derived from a single zygote, which leads to a disease phenotype. Somatic mosaicism can be further categorized into segmental mosaicism and nonsegmental somatic mosaicism. Acne is a chronic illness characterized by inflammatory changes around and in the pilosebaceous units, commonly due to hormone- and inflammatory signaling-mediated factors. Several systemic disorders, such as congenital adrenal hyperplasia, polycystic ovarian syndrome, and seborrhoea-acne-hirsutism-androgenetic alopecia syndrome have classically been associated with acne. Autoinflammatory syndromes, including PAPA, PASH, PAPASH, PsAPASH, PsaPSASH, PASS, and SAPHO syndromes include acneiform lesions as a key manifestation. Mosaic germline mutations in the FGFR2 gene have been associated with Apert syndrome and nevus comedonicus, two illnesses that are accompanied by acneiform lesions. In this review, we summarize the concept of cutaneous mosaicism and elaborate on acne syndromes, as well as acneiform mosaicism.
Collapse
Affiliation(s)
- Sumer Baroud
- Departments of Dermatology, Venereology, Allergology, and Immunology, Dessau Medical Center, Brandenburg Medical School Theodor Fontane and Faculty of Health Sciences Brandenburg, 06847 Dessau, Germany; (S.B.); (J.W.)
- College of Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates
| | - Jim Wu
- Departments of Dermatology, Venereology, Allergology, and Immunology, Dessau Medical Center, Brandenburg Medical School Theodor Fontane and Faculty of Health Sciences Brandenburg, 06847 Dessau, Germany; (S.B.); (J.W.)
| | - Christos C. Zouboulis
- Departments of Dermatology, Venereology, Allergology, and Immunology, Dessau Medical Center, Brandenburg Medical School Theodor Fontane and Faculty of Health Sciences Brandenburg, 06847 Dessau, Germany; (S.B.); (J.W.)
- Correspondence: ; Tel.: +49-340-501-4000
| |
Collapse
|
7
|
Abstract
This article reviews the clinical findings of epidermal nevi and their associated syndromes and provides an update on their pathogenic genetic changes as well as targeted therapies detailed to date.
Collapse
|
8
|
Carmignac V, Salomon G, Severino-Freire M, Duffourd Y, Chevarin M, Vabres P, Mazereeuw-Hautier J. Mosaic NEK9 mutation, fibrous dysplasia and premature puberty in naevus comedonicus syndrome. Br J Dermatol 2021; 185:1247-1249. [PMID: 34184242 DOI: 10.1111/bjd.20603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 06/09/2021] [Accepted: 06/26/2021] [Indexed: 11/30/2022]
Affiliation(s)
- V Carmignac
- Centre de référence MAGEC-Mosaïque, Dermatologie - CHU Dijon, Dijon, France.,Equipe GAD - UF 6254 CHU Dijon - INSERM UMR1231, Dijon, France
| | - G Salomon
- Dermatologie, Centre de Référence des Maladies Rares de la Peau, Toulouse, France
| | - M Severino-Freire
- Dermatologie, Centre de Référence des Maladies Rares de la Peau, Toulouse, France
| | - Y Duffourd
- Equipe GAD - UF 6254 CHU Dijon - INSERM UMR1231, Dijon, France
| | - M Chevarin
- Equipe GAD - UF 6254 CHU Dijon - INSERM UMR1231, Dijon, France
| | - P Vabres
- Centre de référence MAGEC-Mosaïque, Dermatologie - CHU Dijon, Dijon, France.,Equipe GAD - UF 6254 CHU Dijon - INSERM UMR1231, Dijon, France
| | - J Mazereeuw-Hautier
- Dermatologie, Centre de Référence des Maladies Rares de la Peau, Toulouse, France
| |
Collapse
|
9
|
Theiler M, Weibel L, Christen-Zaech S, Carmignac V, Sorlin A, Neuhaus K, Chevarin M, Thauvin-Robinet C, Philippe C, Faivre L, Vabres P, Kuentz P. Cerebriform sebaceous nevus: a subtype of organoid nevus due to specific postzygotic FGFR2 mutations. J Eur Acad Dermatol Venereol 2021; 35:2085-2090. [PMID: 33930231 DOI: 10.1111/jdv.17319] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 03/20/2021] [Accepted: 04/13/2021] [Indexed: 12/29/2022]
Abstract
BACKGROUND Postzygotic mutations in FGFR2 have been identified in mosaic forms of acne, keratinocytic epidermal nevi, nevoid acanthosis nigricans / rounded and velvety epidermal nevus and in two fetuses with papillomatous pedunculated sebaceous nevus (PPSN). OBJECTIVES To determine the clinical and genetic characteristics of children with cerebriform, papillomatous and pedunculated variants of sebaceous nevi. METHODS Infants diagnosed with sebaceous nevi characterized by a cerebriform, papillomatous and/or pedunculated morphology over a 10-year period (2010-2019) at three paediatric dermatology centres in Switzerland and France were included in this case series. Clinical and histological characteristics were assessed. Next-generation sequencing was used to assess for FGFR2 mutations. RESULTS All nevi were located on the head, with a rounded or linear shape and a typical cerebriform, sometimes papillomatous and pedunculated, surface. No associated extracutaneous anomalies were found. Nevi harboured postzygotic mutations in the transmembrane domain of FGFR2 in 6/8 children (75%), either the known specific p.(Cys382Arg) mutation in 5 cases, or a novel mutation, p.(Val395Asp), in one. CONCLUSIONS We found an exquisite genotype-phenotype correlation in these rare nevi, with specific postzygotic mutations in the transmembrane domain of FGFR2. As not all lesions were truly papillomatous and pedunculated, the term cerebriform sebaceous nevus (CSN) appears more suitable than PPSN to describe this entity. The cerebriform pattern of CSN is reminiscent of cutis gyrata, as seen in Beare-Stevenson syndrome, which is caused by closely related germline FGFR2 mutations. While clinically impressive, CSN seem to carry a good prognosis and a low risk for extracutaneous associations.
Collapse
Affiliation(s)
- M Theiler
- Pediatric Skin Center, Department of Dermatology, University Children's Hospital Zurich, Zurich, Switzerland
| | - L Weibel
- Pediatric Skin Center, Department of Dermatology, University Children's Hospital Zurich, Zurich, Switzerland
| | - S Christen-Zaech
- Unité de Dermatologie Pédiatrique, Services de Dermatologie et de Pédiatrie, Département Femme-mère-enfant, Site de l'Hôpital de L'enfance, Lausanne, Switzerland
| | - V Carmignac
- Inserm UMR1231 GAD, Génétique des Anomalies du Développement, Université de Bourgogne, Dijon, France
| | - A Sorlin
- Inserm UMR1231 GAD, Génétique des Anomalies du Développement, Université de Bourgogne, Dijon, France.,Centre de Génétique Médicale, Centre de Référence "Déficiences Intellectuelles de causes rares", CHU de Dijon Bourgogne, Dijon, France
| | - K Neuhaus
- Pediatric Skin Center, Division of Plastic and Reconstructive Surgery, Department of Surgery, University Children's Hospital Zurich, Zurich, Switzerland
| | - M Chevarin
- Inserm UMR1231 GAD, Génétique des Anomalies du Développement, Université de Bourgogne, Dijon, France
| | - C Thauvin-Robinet
- Inserm UMR1231 GAD, Génétique des Anomalies du Développement, Université de Bourgogne, Dijon, France.,Centre de Génétique Médicale, Centre de Référence "Déficiences Intellectuelles de causes rares", CHU de Dijon Bourgogne, Dijon, France.,Fédération Hospitalo-Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD), CHU de Dijon Bourgogne, Dijon, France
| | - C Philippe
- Inserm UMR1231 GAD, Génétique des Anomalies du Développement, Université de Bourgogne, Dijon, France.,Fédération Hospitalo-Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD), CHU de Dijon Bourgogne, Dijon, France
| | - L Faivre
- Inserm UMR1231 GAD, Génétique des Anomalies du Développement, Université de Bourgogne, Dijon, France.,Centre de Génétique Médicale, Centre de Référence "Déficiences Intellectuelles de causes rares", CHU de Dijon Bourgogne, Dijon, France.,Fédération Hospitalo-Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD), CHU de Dijon Bourgogne, Dijon, France
| | - P Vabres
- Inserm UMR1231 GAD, Génétique des Anomalies du Développement, Université de Bourgogne, Dijon, France.,Fédération Hospitalo-Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD), CHU de Dijon Bourgogne, Dijon, France.,Centre de Référence Constitutif MAGEC, Service de Dermatologie, Centre Hospitalier Universitaire Dijon-Bourgogne, Dijon, France
| | - P Kuentz
- Inserm UMR1231 GAD, Génétique des Anomalies du Développement, Université de Bourgogne, Dijon, France.,Fédération Hospitalo-Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD), CHU de Dijon Bourgogne, Dijon, France.,Oncobiologie Génétique Bioinformatique, PCBio, Centre Hospitalier Universitaire de Besançon, Besançon, France
| |
Collapse
|
10
|
Epstein RJ, Tian LJ, Gu YF. 2b or Not 2b: How Opposing FGF Receptor Splice Variants Are Blocking Progress in Precision Oncology. JOURNAL OF ONCOLOGY 2021; 2021:9955456. [PMID: 34007277 PMCID: PMC8110382 DOI: 10.1155/2021/9955456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 04/21/2021] [Indexed: 01/16/2023]
Abstract
More than ten thousand peer-reviewed studies have assessed the role of fibroblast growth factors (FGFs) and their receptors (FGFRs) in cancer, but few patients have yet benefited from drugs targeting this molecular family. Strategizing how best to use FGFR-targeted drugs is complicated by multiple variables, including RNA splicing events that alter the affinity of ligands for FGFRs and hence change the outcomes of stromal-epithelial interactions. The effects of splicing are most relevant to FGFR2; expression of the FGFR2b splice isoform can restore apoptotic sensitivity to cancer cells, whereas switching to FGFR2c may drive tumor progression by triggering epithelial-mesenchymal transition. The differentiating and regulatory actions of wild-type FGFR2b contrast with the proliferative actions of FGFR1 and FGFR3, and may be converted to mitogenicity either by splice switching or by silencing of tumor suppressor genes such as CDH1 or PTEN. Exclusive use of small-molecule pan-FGFR inhibitors may thus cause nonselective blockade of FGFR2 isoforms with opposing actions, undermining the rationale of FGFR2 drug targeting. This splice-dependent ability of FGFR2 to switch between tumor-suppressing and -driving functions highlights an unmet oncologic need for isoform-specific drug targeting, e.g., by antibody inhibition of ligand-FGFR2c binding, as well as for more nuanced molecular pathology prediction of FGFR2 actions in different stromal-tumor contexts.
Collapse
Affiliation(s)
- Richard J. Epstein
- New Hope Cancer Center, Beijing United Hospital, 9-11 Jiangtai West Rd, Chaoyang, Beijing 100015, China
- Garvan Institute of Medical Research and UNSW Clinical School, 84 Victoria St, Darlinghurst 2010 Sydney, Australia
| | - Li Jun Tian
- New Hope Cancer Center, Beijing United Hospital, 9-11 Jiangtai West Rd, Chaoyang, Beijing 100015, China
| | - Yan Fei Gu
- New Hope Cancer Center, Beijing United Hospital, 9-11 Jiangtai West Rd, Chaoyang, Beijing 100015, China
| |
Collapse
|
11
|
Juratli HA, Jägle S, Theiler M, Didona D, Happle R, Knöpfel N, Weibel L, Fischer J. Three novel pathogenic NEK9 variants in patients with nevus comedonicus: A case series. J Am Acad Dermatol 2021; 86:958-960. [PMID: 33819539 DOI: 10.1016/j.jaad.2021.03.096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 03/13/2021] [Accepted: 03/24/2021] [Indexed: 11/20/2022]
Affiliation(s)
- Hazem A Juratli
- Department of Dermatology and Allergology, Philipp University, Marburg, Germany
| | - Sabine Jägle
- Faculty of Medicine, Institute of Human Genetics, Medical Center - University of Freiburg, Freiburg, Germany
| | - Martin Theiler
- Pediatric Skin Center, Department of Dermatology, University Children's Hospital Zurich, Zurich, Switzerland
| | - Dario Didona
- Department of Dermatology and Allergology, Philipp University, Marburg, Germany
| | - Rudolf Happle
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Nicole Knöpfel
- Pediatric Skin Center, Department of Dermatology, University Children's Hospital Zurich, Zurich, Switzerland
| | - Lisa Weibel
- Pediatric Skin Center, Department of Dermatology, University Children's Hospital Zurich, Zurich, Switzerland
| | - Judith Fischer
- Faculty of Medicine, Institute of Human Genetics, Medical Center - University of Freiburg, Freiburg, Germany.
| |
Collapse
|
12
|
De Vito A, Taranath A, Dahmoush H, Ganapathy SS, Sudhakar S, Mankad K. Neuroimaging manifestations of epidermal nevus syndrome. Quant Imaging Med Surg 2021; 11:415-422. [PMID: 33392041 DOI: 10.21037/qims-20-634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Epidermal nevus syndrome (ENS) represents a diverse group of rare neurocutaneous diseases associated with the presence of characteristic epidermal nevi (EN) in the skin and extracutaneous manifestations in the eyes, skeletal, urogenital and central nervous systems. We present a case series of 7 children with ENS, with specific attention to the neuroradiological characteristics of this entity.
Collapse
Affiliation(s)
- Andrea De Vito
- Department of Neuroradiology, H. S. Gerardo Monza, Monza, Italy
| | - Ajay Taranath
- Department of Radiology, Women's and Children's Hospital, North Adelaide, South Australia, Australia
| | - Hisham Dahmoush
- Department of Radiology, Lucile Packard Children's Hospital, Stanford University School of Medicine, Stanford, CA, USA
| | | | - Sniya Sudhakar
- Department of Radiology, Great Ormond Street Hospital, London, UK
| | - Kshitij Mankad
- Department of Radiology, Great Ormond Street Hospital, London, UK
| |
Collapse
|
13
|
Bilateral nevus comedonicus of the eyelids: An unusual cause of ptosis and ectropion. Am J Ophthalmol Case Rep 2020; 20:100907. [PMID: 32984649 PMCID: PMC7495012 DOI: 10.1016/j.ajoc.2020.100907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/14/2020] [Accepted: 08/16/2020] [Indexed: 11/29/2022] Open
|
14
|
Clayton R, Göbel K, Niessen C, Paus R, Steensel M, Lim X. Homeostasis of the sebaceous gland and mechanisms of acne pathogenesis. Br J Dermatol 2019; 181:677-690. [DOI: 10.1111/bjd.17981] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/06/2019] [Indexed: 12/13/2022]
Affiliation(s)
- R.W. Clayton
- Skin Research Institute of Singapore Agency for Science, Technology and Research (A*STAR) Singapore
- Centre for Dermatology Research University of Manchester, and NIHR Manchester Biomedical Research Centre Manchester U.K
| | - K. Göbel
- Skin Research Institute of Singapore Agency for Science, Technology and Research (A*STAR) Singapore
- Department of Dermatology Cologne Excellence Cluster on Stress Responses in Aging Associated Diseases (CECAD), and Centre for Molecular Medicine Cologne The University of Cologne Germany
| | - C.M. Niessen
- Department of Dermatology Cologne Excellence Cluster on Stress Responses in Aging Associated Diseases (CECAD), and Centre for Molecular Medicine Cologne The University of Cologne Germany
| | - R. Paus
- Centre for Dermatology Research University of Manchester, and NIHR Manchester Biomedical Research Centre Manchester U.K
- Department of Dermatology and Cutaneous Surgery University of Miami Miller School of Medicine Miami FL U.S.A
| | - M.A.M. Steensel
- Skin Research Institute of Singapore Agency for Science, Technology and Research (A*STAR) Singapore
- Lee Kong Chian School of Medicine Nanyang Technological University Singapore
| | - X. Lim
- Skin Research Institute of Singapore Agency for Science, Technology and Research (A*STAR) Singapore
- Lee Kong Chian School of Medicine Nanyang Technological University Singapore
| |
Collapse
|
15
|
Common J, Barker J, Steensel M. What does acne genetics teach us about disease pathogenesis? Br J Dermatol 2019; 181:665-676. [DOI: 10.1111/bjd.17721] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2019] [Indexed: 12/18/2022]
Affiliation(s)
- J.E.A. Common
- Skin Research Institute of Singapore, Agency for Science, Technology and Research (A*STAR) Singapore
| | - J.N. Barker
- St John's Institute of Dermatology Faculty of Life Sciences and Medicine King's College London London U.K
| | - M.A.M. Steensel
- Skin Research Institute of Singapore, Agency for Science, Technology and Research (A*STAR) Singapore
- Lee Kong Chian School of Medicine Nanyang Technological University Clinical Sciences Building Novena Singapore
| |
Collapse
|
16
|
Habeshian KA, Kirkorian AY. Common Neonatal Skin Lesions: Melanocytic Nevi, Pigment Alterations, and Nonmelanocytic Nevi. Pediatr Ann 2019; 48:e23-e29. [PMID: 30653639 DOI: 10.3928/19382359-20181207-01] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Birthmarks are common in the healthy population and are generally harmless. Certain presentations, however, raise concern for associated syndromes or potential complications. It is important for pediatricians to be familiar with both harmless and potentially concerning birthmarks. This article discusses congenital melanocytic nevi, café-au-lait macules, hypomelanotic macules, nevus depigmentosus, nevus anemicus, epidermal nevi, and nevus sebaceous, including potential syndromes and complications. [Pediatr Ann. 2019;48(1):e23-e29.].
Collapse
|
17
|
Garcias-Ladaria J, Cuadrado Rosón M, Pascual-López M. Nevus epidérmicos y síndromes relacionados. Parte 2: Nevus derivados de estructuras anexiales. ACTAS DERMO-SIFILIOGRAFICAS 2018; 109:687-698. [DOI: 10.1016/j.ad.2018.05.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 04/16/2018] [Accepted: 05/23/2018] [Indexed: 02/06/2023] Open
|
18
|
Garcias-Ladaria J, Cuadrado Rosón M, Pascual-López M. Epidermal Nevi and Related Syndromes —Part 2: Nevi Derived from Adnexal Structures. ACTAS DERMO-SIFILIOGRAFICAS 2018. [DOI: 10.1016/j.adengl.2018.07.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
19
|
Abstract
Knowledge of the molecular underpinnings of many epidermal nevi and epidermal nevus syndrome has expanded rapidly in recent years. In this review and update on epidermal nevus syndrome, we will cover recent genetic discoveries involving epidermal nevi, including nevus sebaceus, keratinocytic epidermal nevus, nevus comedonicus, congenital hemidysplasia with ichthyosiform nevus and limb defects syndrome, phakomatosis pigmentokeratotica, Becker's nevus, porokeratotic adnexal ostial nevus, inflammatory linear verrucous epidermal nevi, and cutaneous-skeletal hypophosphatemia syndrome. We will discuss how newly defined mutations relate to the biology reflected in the cutaneous patterns seen in these mosaic disorders and how new molecular data has informed our understanding of these diseases and shaped management decisions.
Collapse
Affiliation(s)
- Sarah Asch
- Department of Dermatology, HealthPartners and Park Nicollet Medical Groups, St. Paul, MN, USA
| | - Jeffrey L Sugarman
- Department of Dermatology, University of California, San Francisco, Santa Rosa, CA, USA.,Department of Community and Family Medicine, University of California, San Francisco, Santa Rosa, CA, USA
| |
Collapse
|
20
|
Lichtenberger R, Simpson MA, Smith C, Barker J, Navarini AA. Genetic architecture of acne vulgaris. J Eur Acad Dermatol Venereol 2017; 31:1978-1990. [PMID: 28593717 DOI: 10.1111/jdv.14385] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 05/18/2017] [Indexed: 01/14/2023]
Abstract
Acne vulgaris is a ubiquitary skin disease characterized by chronic inflammation of the pilosebaceous unit resulting from bacterial colonization of hair follicles by Propionibacterium acnes, androgen-induced increased sebum production, altered keratinization and inflammation. Here, we review our current understanding of the genetic architecture of this intriguing disease. We analysed genomewide association studies (GWAS) and candidate genes studies for acne vulgaris. Moreover, we included GWAS studies for the associated disease polycystic ovary syndrome (PCOS). Overall, the available data revealed sixteen genetic loci flagged by single nucleotide polymorphisms (SNPs), none of which has been confirmed yet by independent studies. Moreover, a GWAS for PCOS identified 21 susceptible loci. The genetic architecture is complex which has been revealed by GWAS. Further and larger studies in different populations are required to confirm or disprove results from candidate gene studies as well to identify signals that may overlap between different populations. Finally, studies on rare genetic variants in acne and associated diseases like PCOS may deepen our understanding of its pathogenesis.
Collapse
Affiliation(s)
- R Lichtenberger
- Department of Dermatology, University Hospital of Zurich, Zurich, Switzerland
| | - M A Simpson
- Division of Genetics and Molecular Medicine, King's College, London, UK
| | - C Smith
- Division of Genetics and Molecular Medicine, King's College, London, UK
| | - J Barker
- Division of Genetics and Molecular Medicine, King's College, London, UK
| | - A A Navarini
- Department of Dermatology, University Hospital of Zurich, Zurich, Switzerland.,Division of Genetics and Molecular Medicine, King's College, London, UK
| |
Collapse
|
21
|
Happle R. The Molecular Revolution in Cutaneous Biology: Era of Mosaicism. J Invest Dermatol 2017; 137:e73-e77. [PMID: 28411850 DOI: 10.1016/j.jid.2016.03.045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 02/08/2016] [Accepted: 03/02/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Rudolf Happle
- Department of Dermatology, Freiburg University Medical Center, Freiburg, Germany.
| |
Collapse
|
22
|
Higgins R, Pink A, Hunger R, Yawalkar N, Navarini AA. Generalized Comedones, Acne, and Hidradenitis Suppurativa in a Patient with an FGFR2 Missense Mutation. Front Med (Lausanne) 2017; 4:16. [PMID: 28293556 PMCID: PMC5328982 DOI: 10.3389/fmed.2017.00016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 02/08/2017] [Indexed: 11/13/2022] Open
Abstract
Mutations in the fibroblast growth factor-receptor gene 2 (FGFR2) gene have been implicated in numerous diseases, including nevus comedonicus (NC) and naevoid acne that have somatic missense mutations in FGFR2 in the affected tissue. A patient presented in our department with unusual, innumerable large comedones throughout his back reminiscient of NC, as well as multifocal hidradenitis suppurativa and acne. Topical and systemic treatments were unsuccessful. Whole exome sequencing of blood-derived DNA detected a germline mutation in FGFR2 that was predicted to be damaging. This could explain the multifocal and severe nature of the disease. We suggest screening other, phenotypically similar patients for FGFR2 mutations. Our findings, once confirmed independently, could indicate that therapeutic modulation of FGFR signaling in the acne tetrad could be effective.
Collapse
Affiliation(s)
- Rebecca Higgins
- Department of Dermatology, University Hospital of Zurich , Zurich , Switzerland
| | - Andrew Pink
- King's College, St John's Institute of Dermatology , London , UK
| | - Robert Hunger
- Department of Dermatology, Inselspital, Bern University Hospital and University of Bern , Bern , Switzerland
| | - Nikhil Yawalkar
- Department of Dermatology, Inselspital, Bern University Hospital and University of Bern , Bern , Switzerland
| | - Alexander A Navarini
- Department of Dermatology, University Hospital of Zurich, Zurich, Switzerland; King's College, St John's Institute of Dermatology, London, UK
| |
Collapse
|
23
|
Kuentz P, Fraitag S, Gonzales M, Dhombres F, St‐Onge J, Duffourd Y, Joyé N, Jouannic J, Picard A, Marle N, Thevenon J, Thauvin‐Robinet C, Faivre L, Rivière J, Vabres P. Mosaic‐activating
FGFR2
mutation in two fetuses with papillomatous pedunculated sebaceous naevus. Br J Dermatol 2016; 176:204-208. [DOI: 10.1111/bjd.14681] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/12/2016] [Indexed: 01/14/2023]
Affiliation(s)
- P. Kuentz
- Equipe d'Accueil 4271 Génétique des Anomalies du Développement Université de Bourgogne Franche‐Comté F‐21079 Dijon France
- Fédération Hospitalo‐Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD) Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
- Laboratoire de Génétique Chromosomique et Moléculaire Plateau Technique de Biologie Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
- Génétique Biologique Histologie Centre Hospitalier Universitaire de Besançon F‐25000 Besançon France
| | - S. Fraitag
- Service d'Anatomie et de Cytologie Pathologiques APHP Groupe Hospitalier Necker‐Enfants Malades F‐75743 Paris France
| | - M. Gonzales
- Service de Médecine Fœtale Centre Pluridisciplinaire de Diagnostic Prénatal de l'Est Parisien APHP Hôpital Armand Trousseau Université Pierre et Marie Curie Paris France
| | - F. Dhombres
- Service de Médecine Fœtale Centre Pluridisciplinaire de Diagnostic Prénatal de l'Est Parisien APHP Hôpital Armand Trousseau Université Pierre et Marie Curie Paris France
| | - J. St‐Onge
- Equipe d'Accueil 4271 Génétique des Anomalies du Développement Université de Bourgogne Franche‐Comté F‐21079 Dijon France
- Fédération Hospitalo‐Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD) Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
| | - Y. Duffourd
- Equipe d'Accueil 4271 Génétique des Anomalies du Développement Université de Bourgogne Franche‐Comté F‐21079 Dijon France
- Fédération Hospitalo‐Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD) Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
| | - N. Joyé
- Département de Génétique Médicale APHP Hôpital Armand Trousseau Université Pierre et Marie Curie Paris France
| | - J.‐M. Jouannic
- Service de Médecine Fœtale Centre Pluridisciplinaire de Diagnostic Prénatal de l'Est Parisien APHP Hôpital Armand Trousseau Université Pierre et Marie Curie Paris France
| | - A. Picard
- Service de Chirurgie Maxillo‐Faciale et Chirurgie Plastique APHP Groupe Hospitalier Necker‐Enfants Malades F‐75743 Paris France
- Centre de Référence Malformations Rares de la Face et de la Cavité Buccale UFR Paris Descartes Université Paris France
| | - N. Marle
- Equipe d'Accueil 4271 Génétique des Anomalies du Développement Université de Bourgogne Franche‐Comté F‐21079 Dijon France
- Fédération Hospitalo‐Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD) Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
- Laboratoire de Génétique Chromosomique et Moléculaire Plateau Technique de Biologie Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
| | - J. Thevenon
- Equipe d'Accueil 4271 Génétique des Anomalies du Développement Université de Bourgogne Franche‐Comté F‐21079 Dijon France
- Fédération Hospitalo‐Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD) Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
- Service de Pédiatrie 1 et de Génétique Médicale Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
| | - C. Thauvin‐Robinet
- Equipe d'Accueil 4271 Génétique des Anomalies du Développement Université de Bourgogne Franche‐Comté F‐21079 Dijon France
- Fédération Hospitalo‐Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD) Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
- Service de Pédiatrie 1 et de Génétique Médicale Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
| | - L. Faivre
- Equipe d'Accueil 4271 Génétique des Anomalies du Développement Université de Bourgogne Franche‐Comté F‐21079 Dijon France
- Fédération Hospitalo‐Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD) Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
- Service de Pédiatrie 1 et de Génétique Médicale Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
| | - J.‐B. Rivière
- Equipe d'Accueil 4271 Génétique des Anomalies du Développement Université de Bourgogne Franche‐Comté F‐21079 Dijon France
- Fédération Hospitalo‐Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD) Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
- Laboratoire de Génétique Chromosomique et Moléculaire Plateau Technique de Biologie Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
| | - P. Vabres
- Equipe d'Accueil 4271 Génétique des Anomalies du Développement Université de Bourgogne Franche‐Comté F‐21079 Dijon France
- Fédération Hospitalo‐Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD) Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
- Service de Dermatologie Centre Hospitalo‐Universitaire Dijon‐Bourgogne F‐21079 Dijon France
| |
Collapse
|
24
|
Polat M, Altunay Tuman B, Sahin A, Dogan U, Boran C. Bilateral nevus comedonicus of the eyelids associated with bladder cancer and successful treatment with topical tretinoin. Dermatol Ther 2016; 29:479-481. [PMID: 27502087 DOI: 10.1111/dth.12385] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mualla Polat
- Department of Dermatology, Faculty of Medicine, Abant IzzetBaysal University, Bolu, Turkey
| | - Bengu Altunay Tuman
- Department of Dermatology, Faculty of Medicine, Abant IzzetBaysal University, Bolu, Turkey
| | - Asli Sahin
- Department of Dermatology, IzzetBaysal Education and Research Hospital, Bolu, Turkey
| | - Umit Dogan
- Department of Ophthalmology, Faculty of Medicine, Abant IzzetBaysal University, Bolu, Turkey
| | - Cetin Boran
- Department of Pathology, Faculty of Medicine, Abant IzzetBaysal University, Bolu, Turkey
| |
Collapse
|
25
|
Somatic Embryonic FGFR2 Mutations in Keratinocytic Epidermal Nevi. J Invest Dermatol 2016; 136:1718-1721. [DOI: 10.1016/j.jid.2016.03.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 03/17/2016] [Accepted: 03/21/2016] [Indexed: 11/15/2022]
|
26
|
Somatic Mutations in NEK9 Cause Nevus Comedonicus. Am J Hum Genet 2016; 98:1030-1037. [PMID: 27153399 DOI: 10.1016/j.ajhg.2016.03.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 03/16/2016] [Indexed: 11/21/2022] Open
Abstract
Acne vulgaris (AV) affects most adolescents, and of those affected, moderate to severe disease occurs in 20%. Comedones, follicular plugs consisting of desquamated keratinocytes and sebum, are central to its pathogenesis. Despite high heritability in first-degree relatives, AV genetic determinants remain incompletely understood. We therefore employed whole-exome sequencing (WES) in nevus comedonicus (NC), a rare disorder that features comedones and inflammatory acne cysts in localized, linear configurations. WES identified somatic NEK9 mutations, each affecting highly conserved residues within its kinase or RCC1 domains, in affected tissue of three out of three NC-affected subjects. All mutations are gain of function, resulting in increased phosphorylation at Thr210, a hallmark of NEK9 kinase activation. We found that comedo formation in NC is marked by loss of follicular differentiation markers, expansion of keratin-15-positive cells from localization within the bulge to the entire sub-bulge follicle and cyst, and ectopic expression of keratin 10, a marker of interfollicular differentiation not present in normal follicles. These findings suggest that NEK9 mutations in NC disrupt normal follicular differentiation and identify NEK9 as a potential regulator of follicular homeostasis.
Collapse
|
27
|
Kiritsi D, Lorente AI, Happle R, Bernabeu Wittel J, Has C. Blaschko line acne on pre-existent hypomelanosis reflecting a mosaic FGFR2 mutation. Br J Dermatol 2015; 172:1125-7. [PMID: 25350236 DOI: 10.1111/bjd.13491] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- D Kiritsi
- Department of Dermatology, Medical Center - University of Freiburg, Hauptstrasse 7, 79104, Freiburg, Germany
| | | | | | | | | |
Collapse
|
28
|
Ferrari B, Taliercio V, Restrepo P, Luna P, Abad ME, Larralde M. Nevus comedonicus: a case series. Pediatr Dermatol 2015; 32:216-9. [PMID: 25557057 DOI: 10.1111/pde.12466] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Twelve previously unreported cases of nevus comedonicus are presented. Characteristic closely grouped dilated follicular openings with horny plugs that mimic comedones led to the diagnosis. One patient had nevus comedonicus syndrome and there were cases with atypical locations and unusual complications of this condition. We also highlight clinical associations and therapeutic options.
Collapse
|
29
|
Abstract
The term epidermal nevus syndrome (ENS) has been used to describe the association of epidermal hamartomas and extracutaneous abnormalities. Although many continue to use the term "ENS," it is now understood that this is not one disease, but rather a heterogeneous group with distinct genetic profiles defined by a common cutaneous phenotype: the presence of epidermal and adnexal hamartomas that are associated with other organ system involvement. One commonality is that epidermal nevi often follow the lines of Blaschko and it appears the more widespread the cutaneous manifestations, the greater the risk for extracutaneous manifestations. The majority of the extracutaneous manifestations involve the brain, eye, and skeletal systems. The CNS involvement is wide ranging and involves both clinical manifestations such as intellectual disability and seizures, as well as structural anomalies. Several subsets of ENS with characteristic features have been delineated including the nevus sebaceus syndrome, Proteus syndrome, CHILD syndrome, Becker's nevus syndrome, nevus comedonicus syndrome, and phakomatosis pigmentokeratotica. Advances in molecular biology have revealed that the manifestations of ENS are due to genomic mosaicism. It is likely that the varied clinical manifestations of ENS are due in great part to the functional effects of specific genetic defects. Optimal management of the patient with ENS involves an interdisciplinary approach given the potential for multisystem involvement. Of note, epidermal nevi have been associated with both benign and malignant neoplasms, and thus ongoing clinical follow-up is required.
Collapse
Affiliation(s)
- Sarah Asch
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA
| | - Jeffrey L Sugarman
- Departments of Dermatology and Community and Family Medicine, University of California San Francisco, Santa Rosa, CA, USA.
| |
Collapse
|
30
|
Abstract
Follicular disorders are possibly a commonly seen, though rarely reported, group of disorders, which are localized around follicles and appendages and clinically present as small papules. Classically, clinicopathological follicular plugging is seen in the "true" follicular disorders, which are appropriately referred to as follicular keratosis. Another subtype is folliculitis (infectious or noninfectious) and the follicular mimickers that clinically resemble "true" follicular disorders without the follicular keratoses. Acne vulgaris has an amalgamation of all the above lesion types. Our review is aimed at describing all the follicular disorders and gives an algorithm for diagnosing the common follicular disorders.
Collapse
|
31
|
Hong JB, Prucha H, Melnik B, Ziai M, Ring J, Chen W. [Uncommon acne-associated syndromes and their significance in understanding the pathogenesis of acne]. DER HAUTARZT 2013; 64:274-9. [PMID: 23525534 DOI: 10.1007/s00105-012-2460-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Acne is an intriguing model for the study of interactions between hormones, innate immunity, inflammation and wound healing (scarring). The manifestations and involvement of acne in different systemic diseases and some rare syndromes demonstrate its multifaceted nature. Synovitis-Acne-Pustulosis-Hyperostosis-Osteitis (SAPHO) and Pyogenic Arthritis-Pyoderma gangrenosum-Acne (PAPA) syndromes, both regarded as autoinflammatory diseases, highlight the attributes of inflammation in acne. While SAPHO syndrome can be used to explore the pathogenic role of Propionibacterium acnes in acne, PAPA syndrome and Apert syndrome can help understand the genetic influence on acne. The genetic defects in the gain-of-function of FGFR2 mutations in Apert syndrome and acne nevus of Munro lend further support to the hypothesis that the interaction of forkhead box class O (FoxOs)-mediated transcriptional regulation with androgen receptor transactivation and insulin/insulin like growth factor-1(IGF-1)-signaling is crucial in acne pathogenesis. Novel biologics, such as tumor necrosis factor (TNF) blockers and IL-1 inhibitors, appear promising in opposing the inflammation associated with SAPHO and PAPA syndromes, but it remains to seen if they can also improve severe acne particularly in the long term.
Collapse
Affiliation(s)
- J-B Hong
- Klinik für Dermatologie, National Taiwan University Hospital, Taipei
| | | | | | | | | | | |
Collapse
|
32
|
Abstract
The intention of this review on nevus comedonicus (NC) is to update on clinical features, pathogenesis, and therapy. NC is a rare epidermal nevus type. It is part of the nevus comedonicus syndrome, a neurocutaneous disorder with ocular, skeletal, and central nervous symptoms. Recently, acne-related signaling pathways and somatic mutations of tyrosine kinase receptors have been identified and may play a role in NC pathogenesis. On preexistent NC secondary skin tumors can develop, which are often benign. Treatment options of NC include topical therapy, laser, and surgery.
Collapse
|
33
|
Update on Epidermal Nevi and Associated Syndromes. CURRENT DERMATOLOGY REPORTS 2012. [DOI: 10.1007/s13671-012-0025-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
34
|
Sarma N. Pigmentary nevi on face have unique patterns and implications: The concept of Blaschko's lines for pigmentary nevi. Indian J Dermatol 2012; 57:30-4. [PMID: 22470205 PMCID: PMC3312653 DOI: 10.4103/0019-5154.92673] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Background: Nevi are proposed to reflect the mosaicism and thus generally follow the different archetypal patterns of mosaicism. Blaschko's lines are the most common pattern of mosaicism. There have been many attempts to elucidate the Blaschko's lines on face from the distributional patterns of different nevi, but studies that evaluated exclusively pigmentary nevi are sparse. Aims: This study attempted to evaluate the patterns followed by different pigmentary nevi on face and utilized this to elucidate the pattern of embryological pigmentation on face. Materials and Methods: Spatial parameters like shape, orientation, and distribution patterns of different flat pigmentary nevi on face were analyzed and graphically drawn on human facial diagram. This was compared with existing facial Blaschko's lines. All cases of palpable pigmented nevi like congenital and giant melanocytic nevi and nevus spilus were excluded. Results: A total of 68 cases of pigmentary nevi on face (male-39, female-29) were examined. The shape and distribution lines were found to have a close similarity with Blaschko's lines on face with distinct differences. Conclusions: The concept of facial embryonic pigmentary ‘segment’, ‘unit’ and existence of separate Blaschko's lines for facial pigmentary nevi is conceived. Some insight into the pathogenesis of Blaschko's lines is also proposed in this study.
Collapse
Affiliation(s)
- Nilendu Sarma
- Department of Dermatology, NRS Medical College, 138 AJC Bose Rd, Kolkata, India.
| |
Collapse
|
35
|
Torchia D, Schachner LA, Izakovic J. Segmental Acne versus Mosaic Conditions with Acne Lesions. Dermatology 2012; 224:10-4. [DOI: 10.1159/000336797] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Accepted: 01/17/2012] [Indexed: 11/19/2022] Open
|
36
|
Szabó K, Kemény L. Studying the genetic predisposing factors in the pathogenesis of acne vulgaris. Hum Immunol 2011; 72:766-73. [PMID: 21669244 DOI: 10.1016/j.humimm.2011.05.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 04/28/2011] [Accepted: 05/13/2011] [Indexed: 02/04/2023]
Abstract
Acne is one of the most common dermatologic diseases in the developed regions of the world, affecting a large percentage of the population. Despite the great improvement in the number and quality of studies of the molecular etiology of this disease in the past 3 decades, the detailed molecular pathogenesis and the cause of the large individual variations in severity of skin symptoms remain unknown. The roles of genetic inheritance and special genetic susceptibility and protective factors have been suggested for over 100 years, but their identification and determination started only in the 1990s. To date, only a small number of genetic polymorphisms affecting the expression and/or function of a handful of genes have been investigated. This review surveys the major findings of the classic and molecular genetic studies that have been conducted in this field, draws conclusions, and indicates how the available data help our current understanding of the pathogenesis of this common skin disease.
Collapse
Affiliation(s)
- Kornélia Szabó
- Dermatological Research Group of the Hungarian Academy of Sciences, Szeged, Hungary.
| | | |
Collapse
|
37
|
Affiliation(s)
- Deanna Sikorski
- Department of Dermatology, The Cleveland Clinic Foundation, Cleveland, OH, USA
| | | | | |
Collapse
|
38
|
Abstract
Linear morphea, lichen striatus, and nevus comedonicus are rare conditions. We describe a five-year-old girl in whom all three of these dermatoses are present.
Collapse
Affiliation(s)
- Aparna Sinha
- Department of Dermatology, Sunderland Royal Hospital, Sunderland, United Kingdom.
| | | |
Collapse
|
39
|
Chen W, Obermayer-Pietsch B, Hong JB, Melnik BC, Yamasaki O, Dessinioti C, Ju Q, Liakou AI, Al-Khuzaei S, Katsambas A, Ring J, Zouboulis CC. Acne-associated syndromes: models for better understanding of acne pathogenesis. J Eur Acad Dermatol Venereol 2010; 25:637-46. [DOI: 10.1111/j.1468-3083.2010.03937.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
40
|
Goriely A, Lord H, Lim J, Johnson D, Lester T, Firth HV, Wilkie AOM. Germline and somatic mosaicism for FGFR2 mutation in the mother of a child with Crouzon syndrome: Implications for genetic testing in "paternal age-effect" syndromes. Am J Med Genet A 2010; 152A:2067-73. [PMID: 20635358 PMCID: PMC2988406 DOI: 10.1002/ajmg.a.33513] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Crouzon syndrome is a dominantly inherited disorder characterized by craniosynostosis and facial dysostosis, caused by mutations in the fibroblast growth factor receptor 2 (FGFR2) gene; it belongs to a class of disorders that mostly arise as de novo mutations and exhibit a near-exclusive paternal origin of mutation and elevated paternal age (“paternal age effect”). However, even if this is the major mode of origin of mutations in paternal age-effect disorders, germline mosaicism may also occur. Here we describe the first molecularly documented evidence of germline and somatic mosaicism for FGFR2 mutation, identified in the mother of a child with Crouzon syndrome caused by a heterozygous c.1007A>G (p.Asp336Gly) substitution. Levels of maternal somatic mosaicism for this mutation, estimated by pyrosequencing, ranged from 3.3% in hair roots to 14.1% in blood. Our observation underlines the importance of parental molecular testing for accurate genetic counseling of the risk of recurrence for Crouzon, and other paternal age-effect syndromes. © 2010 Wiley-Liss, Inc.
Collapse
Affiliation(s)
- Anne Goriely
- Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | | | | | | | | | | | | |
Collapse
|
41
|
Abstract
Nevi or nests of cells may be made up of a variety of cell types. The cell types that live in the epidermis include epidermal cells or keratinocytes, sebaceous glands, hair follicles, apocrine and eccrine glands, and smooth muscle cells. This article discusses epidermal or keratinocyte nevi, nevus sebaceous, nevus comedonicus, smooth muscle hamartomas, and inflammatory linear verrucous epidermal nevi. Syndromes associated with epidermal nevi are also reviewed.
Collapse
|
42
|
Happle R. The group of epidermal nevus syndromes Part I. Well defined phenotypes. J Am Acad Dermatol 2010; 63:1-22; quiz 23-4. [PMID: 20542174 DOI: 10.1016/j.jaad.2010.01.017] [Citation(s) in RCA: 130] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2009] [Revised: 01/09/2010] [Accepted: 04/23/2009] [Indexed: 11/20/2022]
Abstract
UNLABELLED The epidermal nevus syndromes represent a group of distinct disorders that can be distinguished by the type of associated epidermal nevus and by the criterion of presence or absence of heritability. Well defined syndromes characterized by organoid epidermal nevi include Schimmelpenning syndrome, phacomatosis pigmentokeratotica, nevus comedonicus syndrome, angora hair nevus syndrome, and Becker nevus syndrome. The molecular basis of these disorders has so far not been identified. By contrast, the group of syndromes characterized by keratinocytic nevi comprises three phenotypes with a known molecular etiology in the form of CHILD (congenital hemidysplasia with ichthyosiform nevus and limb defects) syndrome, type 2 segmental Cowden disease, and fibroblast growth factor receptor 3 epidermal nevus syndrome (García-Hafner-Happle syndrome), whereas Proteus syndrome is still of unknown origin. From this overview, it is clear that a specific type of these disorders cannot be classified by the name "epidermal nevus syndrome" nor by the terms "organoid nevus syndrome" or "keratinocytic nevus syndrome." LEARNING OBJECTIVES After completing this learning activity, participants should be able to distinguish nine different epidermal nevus syndromes by their characteristic features, understand the practical significance of avoiding terms like "epidermal nevus syndrome" or "keratinocytic nevus syndrome" to define any specific entity within this group of disorders, and differentiate between nonhereditary traits and those bearing a genetic risk because of either Mendelian or non-Mendelian inheritance.
Collapse
Affiliation(s)
- Rudolf Happle
- Department of Dermatology, University of Marburg, Marburg, Germany.
| |
Collapse
|
43
|
Kurokawa I, Danby FW, Ju Q, Wang X, Xiang LF, Xia L, Chen W, Nagy I, Picardo M, Suh DH, Ganceviciene R, Schagen S, Tsatsou F, Zouboulis CC. New developments in our understanding of acne pathogenesis and treatment. Exp Dermatol 2009; 18:821-32. [PMID: 19555434 DOI: 10.1111/j.1600-0625.2009.00890.x] [Citation(s) in RCA: 348] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Interest in sebaceous gland physiology and its diseases is rapidly increasing. We provide a summarized update of the current knowledge of the pathobiology of acne vulgaris and new treatment concepts that have emerged in the last 3 years (2005-2008). We have tried to answer questions arising from the exploration of sebaceous gland biology, hormonal factors, hyperkeratinization, role of bacteria, sebum, nutrition, cytokines and toll-like receptors (TLRs). Sebaceous glands play an important role as active participants in the innate immunity of the skin. They produce neuropeptides, excrete antimicrobial peptides and exhibit characteristics of stem cells. Androgens affect sebocytes and infundibular keratinocytes in a complex manner influencing cellular differentiation, proliferation, lipogenesis and comedogenesis. Retention hyperkeratosis in closed comedones and inflammatory papules is attributable to a disorder of terminal keratinocyte differentiation. Propionibacterium acnes, by acting on TLR-2, may stimulate the secretion of cytokines, such as interleukin (IL)-6 and IL-8 by follicular keratinocytes and IL-8 and -12 in macrophages, giving rise to inflammation. Certain P. acnes species may induce an immunological reaction by stimulating the production of sebocyte and keratinocyte antimicrobial peptides, which play an important role in the innate immunity of the follicle. Qualitative changes of sebum lipids induce alteration of keratinocyte differentiation and induce IL-1 secretion, contributing to the development of follicular hyperkeratosis. High glycemic load food and milk may induce increased tissue levels of 5alpha-dihydrotestosterone. These new aspects of acne pathogenesis lead to the considerations of possible customized therapeutic regimens. Current research is expected to lead to innovative treatments in the near future.
Collapse
Affiliation(s)
- Ichiro Kurokawa
- Department of Dermatology, Mie Universtity Graduate School of Medicine, Tsu, Mie, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Melnik BC. Role of FGFR2-signaling in the pathogenesis of acne. DERMATO-ENDOCRINOLOGY 2009; 1:141-56. [PMID: 20436882 PMCID: PMC2835907 DOI: 10.4161/derm.1.3.8474] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2009] [Accepted: 03/18/2009] [Indexed: 01/10/2023]
Abstract
It is the purpose of this review to extend our understanding of the fibroblast growth factor (FGF) receptor-2b-signaling network in the pathogenesis of acne. A new concept of the role of FGFR2b-signaling in dermal-epithelial interaction for skin appendage formation, pilosebaceous follicle homeostasis, comedogenesis, sebaceous gland proliferation and lipogenesis is presented. The FGFR2-gain-of-function mutations in Apert syndrome and unilateral acneiform nevus are most helpful model diseases pointing the way to androgen-dependent dermalepithelial FGFR2-signaling in acne. Androgen-mediated upregulation of FGFR2b-signaling in acne-prone skin appears to be involved in the pathogenesis of acne vulgaris. In organotypic skin cultures, keratinocyte-derived interleukin-1alpha stimulated fibroblasts to secrete FGF7 which stimulated FGFR2b-mediated keratinocyte proliferation. Postnatal deletion of FGFR2b in mice resulted in severe sebaceous gland atrophy. The importance of FGFR2b in sebaceous gland physiology is further supported by the mode of action of anti-acne agents which have been proposed to attenuate FGFR2b-signaling. Downregulation of FGFR2b-signaling by isotretinoin explains its therapeutic effect in acne. Downregulation of FGFR2b-signaling during the first trimester of pregnancy disturbs branched morphogenesis and explains retinoid embryotoxicity. Insulin-like growth factor-1 (IGF-1), the mediator of growth hormone during puberty, intracts with androgen-dependent FGFR2b-signaling and links androgen- and FGF-mediated signal transduction important in sebaceous gland homeostasis. The search for a follicular defect in the dermalepithelial regulation of growth factor-signaling in acne-prone skin appears to be a most promising approach to clarify the pathogenesis of acne.
Collapse
Affiliation(s)
- Bodo C Melnik
- Department of Dermatology; Environmental Medicine and Health Theory; University of Osnabrück; Germany
| |
Collapse
|
45
|
Katoh M. FGFR2 abnormalities underlie a spectrum of bone, skin, and cancer pathologies. J Invest Dermatol 2009; 129:1861-7. [PMID: 19387476 DOI: 10.1038/jid.2009.97] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Fibroblast growth factor receptor (FGFR)2 is regulated on the basis of the balance of FGFs, heparan-sulfate proteoglycans, FGFR2 isoforms, endogenous inhibitors, and microRNAs. FGFR2 signals cross-talk with hedgehog, bone morphogenetic protein, and other regulatory networks. Some cases of congenital skeletal disorders with an FGFR2 mutation show skin phenotypes, including acne, cutis gyrata, and acanthosis nigricans. Gain-of-function mutations or variations of human FGFR2 occur in estrogen receptor-positive breast cancer, diffuse-type gastric cancer, and endometrial uterine cancer. Oral administration of AZD2171 or Ki23057 inhibits in vivo proliferation of cancer cells with aberrant FGFR2 activation in rodent therapeutic models. However, loss-of-function mutations of FGFR2 are reported in human melanoma. Conditional Fgfr2b knockout in the rodent epidermis leads to increased macrophage infiltration to the dermis and adipose tissue, epidermal thickening accompanied by basal-layer dysplasia and parakeratosis, and the promotion of chemically induced squamous-cell carcinoma. Dysregulation of FGFR2 results in a spectrum of bone and skin pathologies and several types of cancer.
Collapse
Affiliation(s)
- Masaru Katoh
- Genetics and Cell Biology Section, National Cancer Center, Tokyo, Japan.
| |
Collapse
|
46
|
Keratitis-Ichthyosis-Deafness Syndrome Caused by GJB2 Maternal Mosaicism. J Invest Dermatol 2009; 129:776-9. [DOI: 10.1038/jid.2008.312] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
47
|
|
48
|
Melnik BC, Vakilzadeh F, Aslanidis C, Schmitz G. Unilateral segmental acneiform naevus: a model disorder towards understanding fibroblast growth factor receptor 2 function in acne? Br J Dermatol 2008; 158:1397-9. [PMID: 18410418 DOI: 10.1111/j.1365-2133.2008.08559.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
49
|
|
50
|
Tantcheva-Poor I, Reinhold K, Krieg T, Happle R. Trichilemmal cyst nevus: A new complex organoid epidermal nevus. J Am Acad Dermatol 2007; 57:S72-7. [PMID: 17097381 DOI: 10.1016/j.jaad.2006.03.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2006] [Revised: 03/07/2006] [Accepted: 03/08/2006] [Indexed: 10/24/2022]
Abstract
A 31-year-old woman had an organoid nevus characterized by multiple trichilemmal cysts arranged in a bandlike pattern. The involved streaks followed Blaschko's lines and were covered, in addition, by multiple filiform hyperkeratoses and comedo-like plugs. Some histopathologic features of this complex nevus were reminiscent of those of well-established organoid nevi such as nevus comedonicus, porokeratotic eccrine nevus, or hair follicle nevus, but the presence of multiple large trichilemmal cysts was a conspicuously distinctive abnormality. Consequently, we propose for this new organoid nevus the names "trichilemmal cyst nevus" or "nevus trichilemmocysticus."
Collapse
|