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Cai L, Lin Z, Wang H. A novel CLDN1 variant identified in a case of ILVASC with sparse curly hair. Clin Exp Dermatol 2023; 48:794-795. [PMID: 36881999 DOI: 10.1093/ced/llad071] [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: 12/05/2022] [Revised: 01/23/2023] [Accepted: 02/13/2023] [Indexed: 03/09/2023]
Abstract
ILVASC (ichthyosis, leukocyte vacuoles, alopecia and sclerosing cholangitis) is an extremely rare autosomal recessive syndromic ichthyosis. Herein we report on a Chinese ILVASC case with a novel phenotype of curly hair caused by a previously unrecorded homozygous mutation in CLDN1.
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Affiliation(s)
- Liangqi Cai
- Department of Dermatology, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Zhimiao Lin
- Dermatology Hospital, Southern Medical University, Guangzhou, China
- Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Diseases and NMPA Key Laboratory for Quality Control and Evaluation of Cosmetics, Beijing, China
- Department of Dermatology, Xiamen Chang Gung Hospital, Xiamen, China
| | - Huijun Wang
- Dermatology Hospital, Southern Medical University, Guangzhou, China
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Nam W, Kim H, Bae C, Kim J, Nam B, Kim J, Park S, Lee J, Sim J. Lactobacillus paracasei HY7015 Promotes Hair Growth in a Telogenic Mouse Model. J Med Food 2021; 24:741-748. [PMID: 34280032 DOI: 10.1089/jmf.2020.4860] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
In this study, we describe the effects of Lactobacillus paracasei HY7015 (HY7015) on promoting mouse hair growth. Since our purpose was to increase hair growth through oral administration, medicinal yeast, at a suitable concentration for application in mice, was used as a positive control. First, experiments were conducted to determine the effect of HY7015 on proliferation of hair follicle dermal papilla cells (HFDPC), which are important contributors to hair growth. HY7015 stimulated HFDPC proliferation in vitro and increased their secretion of vascular endothelial growth factor and insulin-like growth factor-1. In mouse experiments, oral administration of HY7015 promoted hair growth and hair follicle maturation in the dorsal skin, as well as increasing growth factor levels in mouse serum. In summary, we demonstrate that L. paracasei HY7015 consumption can promote hair growth by stimulating HFDPC proliferation and growth factor secretion. Follow-up studies are warranted to determine the underlying mechanism, using various approaches, including investigation of changes in intestinal microbiota and alteration of gene and protein expression.
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Affiliation(s)
- Woo Nam
- R&D Center, Korea Yakult Co. Ltd., Yongin, Korea
| | - Hyeonji Kim
- R&D Center, Korea Yakult Co. Ltd., Yongin, Korea
| | - Chuhyun Bae
- R&D Center, Korea Yakult Co. Ltd., Yongin, Korea
| | - Jisoo Kim
- R&D Center, Korea Yakult Co. Ltd., Yongin, Korea
| | - Bora Nam
- R&D Center, Korea Yakult Co. Ltd., Yongin, Korea
| | - Jooyun Kim
- R&D Center, Korea Yakult Co. Ltd., Yongin, Korea
| | - Soodong Park
- R&D Center, Korea Yakult Co. Ltd., Yongin, Korea
| | | | - Jaehun Sim
- R&D Center, Korea Yakult Co. Ltd., Yongin, Korea
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Alopecia areata susceptibility variant in MHC region impacts expressions of genes contributing to hair keratinization and is involved in hair loss. EBioMedicine 2020; 57:102810. [PMID: 32580135 PMCID: PMC7317227 DOI: 10.1016/j.ebiom.2020.102810] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 05/07/2020] [Accepted: 05/09/2020] [Indexed: 01/08/2023] Open
Abstract
Background Alopecia areata (AA) is considered a highly heritable, T-cell-mediated autoimmune disease of the hair follicle. However, no convincing susceptibility gene has yet been pinpointed in the major histocompatibility complex (MHC), a genome region known to be associated with AA as compared to other regions. Methods We engineered mice carrying AA risk allele identified by haplotype sequencing for the MHC region using allele-specific genome editing with the CRISPR/Cas9 system. Finally, we performed functional evaluations in the mice and AA patients with and without the risk allele. Findings We identified a variant (rs142986308, p.Arg587Trp) in the coiled-coil alpha-helical rod protein 1 (CCHCR1) gene as the only non-synonymous variant in the AA risk haplotype. Furthermore, mice engineered to carry the risk allele displayed a hair loss phenotype. Transcriptomics further identified CCHCR1 as a novel component interacting with hair cortex keratin in hair shafts. Both, these alopecic mice and AA patients with the risk allele displayed morphologically impaired hair and comparable differential expression of hair-related genes, including hair keratin and keratin-associated proteins (KRTAPs). Interpretation Our results implicate CCHCR1 with the risk allele in a previously unidentified subtype of AA based on aberrant keratinization in addition to autoimmune events. Funding This work was supported by JSPS KAKENHI (JP16K10177) and the NIHR UCLH Biomedical Research center (BRC84/CN/SB/5984).
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Khan GM, Hassan N, Khan N, Humayun M, Khan K, Khaliq S, Rehman FU, Ahmed S, Shah K, Khan SA, Muhammad N, Wali A, Khan S, Basit S, Ayub M. Biallelic mutations in the
LPAR
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gene causing autosomal recessive wooly hair/hypotrichosis phenotype in five Pakistani families. Int J Dermatol 2019; 58:946-952. [DOI: 10.1111/ijd.14480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 02/25/2019] [Accepted: 04/11/2019] [Indexed: 11/28/2022]
Affiliation(s)
- Ghulam M. Khan
- Institute of Biochemistry University of Balochistan Quetta Pakistan
| | - Noor Hassan
- Institute of Biochemistry University of Balochistan Quetta Pakistan
| | - Niamatullah Khan
- Department of Biotechnology & Genetic Engineering Kohat University of Science & Technology Kohat Khyber Pakhtunkhwa Pakistan
| | - Muhammad Humayun
- Department of Biotechnology & Genetic Engineering Kohat University of Science & Technology Kohat Khyber Pakhtunkhwa Pakistan
| | - Kafaitullah Khan
- Department of Microbiology University of Balochistan Quetta Pakistan
| | - Samira Khaliq
- Institute of Biochemistry University of Balochistan Quetta Pakistan
| | - Fazal U. Rehman
- Department of Microbiology University of Balochistan Quetta Pakistan
| | - Sheikh Ahmed
- Institute of Biochemistry University of Balochistan Quetta Pakistan
| | - Khadim Shah
- Department of Biotechnology COMSATS University Islamabad Abbottabad Campus Pakistan
| | - Sher A. Khan
- Department of Biotechnology & Genetic Engineering Kohat University of Science & Technology Kohat Khyber Pakhtunkhwa Pakistan
| | - Noor Muhammad
- Department of Biotechnology & Genetic Engineering Kohat University of Science & Technology Kohat Khyber Pakhtunkhwa Pakistan
| | - Abdul Wali
- Department of Biotechnology Faculty of Life Sciences & Informatics BUITEMS Quetta Pakistan
| | - Saadullah Khan
- Department of Biotechnology & Genetic Engineering Kohat University of Science & Technology Kohat Khyber Pakhtunkhwa Pakistan
| | - Sulman Basit
- Center for Genetics and Inherited Diseases Taibah University Almadinah Almadinah Saudi Arabia
| | - Muhammad Ayub
- Institute of Biochemistry University of Balochistan Quetta Pakistan
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Devos M, Gilbert B, Denecker G, Leurs K, Mc Guire C, Lemeire K, Hochepied T, Vuylsteke M, Lambert J, Van Den Broecke C, Libbrecht L, Haigh J, Berx G, Lippens S, Vandenabeele P, Declercq W. Elevated ΔNp63α Levels Facilitate Epidermal and Biliary Oncogenic Transformation. J Invest Dermatol 2016; 137:494-505. [PMID: 27725202 DOI: 10.1016/j.jid.2016.09.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 09/05/2016] [Accepted: 09/20/2016] [Indexed: 12/23/2022]
Abstract
Unlike its family member p53, TP63 is rarely mutated in human cancer. However, ΔNp63α protein levels are often elevated in tumors of epithelial origin, such as squamous cell carcinoma and cholangiocarcinoma. To study the oncogenic properties of ΔNp63α in vivo, we generated transgenic mice overexpressing ΔNp63α from the Rosa26 locus promoter controlled by keratin 5-Cre. We found that these mice spontaneously develop epidermal cysts and ectopic ΔNp63α expression in the bile duct epithelium that leads to dilatation of the intrahepatic biliary ducts, to hepatic cyst formation and bile duct adenoma. Moreover, when subjected to models of 7,12-dimethylbenz[a]anthracene-based carcinogenesis, tumor initiation was increased in ΔNp63α transgenic mice in a gene dosage-dependent manner although ΔNp63α overexpression did not alter the sensitivity to 7,12-dimethylbenz[a]anthracene-induced cytotoxicity in vivo. However, keratinocytes isolated from ΔNp63α transgenic mice displayed increased survival and delayed cellular senescence compared with wild-type keratinocytes, marked by decreased p16Ink4a and p19Arf expression. Taken together, we show that increased ΔNp63α protein levels facilitate oncogenic transformation in the epidermis as well as in the bile duct.
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Affiliation(s)
- Michael Devos
- Molecular Signaling and Cell Death Unit, Inflammation Research Center, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Barbara Gilbert
- Molecular Signaling and Cell Death Unit, Inflammation Research Center, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Geertrui Denecker
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium; Molecular and Cellular Oncology Unit, Inflammation Research Center, VIB, Ghent, Belgium
| | - Kirsten Leurs
- Molecular Signaling and Cell Death Unit, Inflammation Research Center, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Conor Mc Guire
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium; Molecular Signal Transduction in Inflammation Unit, Inflammation Research Center, VIB, Ghent, Belgium
| | - Kelly Lemeire
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium; Inflammation Research Center, VIB, Ghent, Belgium
| | - Tino Hochepied
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium; Transgenic mice core facility, VIB, Ghent, Belgium
| | | | - Jo Lambert
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
| | | | - Louis Libbrecht
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
| | - Jody Haigh
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium; Vascular Cell Biology Unit, Department for Molecular Biomedical Research, VIB, Ghent, Belgium
| | - Geert Berx
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium; Molecular and Cellular Oncology Unit, Inflammation Research Center, VIB, Ghent, Belgium
| | - Saskia Lippens
- Molecular Signaling and Cell Death Unit, Inflammation Research Center, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Peter Vandenabeele
- Molecular Signaling and Cell Death Unit, Inflammation Research Center, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Wim Declercq
- Molecular Signaling and Cell Death Unit, Inflammation Research Center, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
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Correction of Hair Shaft Defects through Allele-Specific Silencing of Mutant Krt75. J Invest Dermatol 2016; 136:45-51. [PMID: 26763422 PMCID: PMC4764097 DOI: 10.1038/jid.2015.375] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 08/10/2015] [Accepted: 09/12/2015] [Indexed: 11/25/2022]
Abstract
Dominant mutations in keratin genes can cause a number of inheritable skin disorders characterized by intraepidermal blistering, epidermal hyperkeratosis, or abnormalities in skin appendages, such as nail plate dystrophy and structural defects in hair. Allele-specific silencing of mutant keratins through RNA interference is a promising therapeutic approach for suppressing the expression of mutant keratins and related phenotypes in the epidermis. However, its effectiveness on skin appendages remains to be confirmed in vivo. In this study, we developed allele specific siRNAs capable of selectively suppressing the expression of a mutant Krt75, which causes hair shaft structural defects characterized by the development of blebs along the hair shaft in mice. Hair regenerated from epidermal keratinocyte progenitor cells isolated from mutant Krt75 mouse models reproduced the blebbing phenotype when grafted in vivo. In contrast, mutant cells manipulated with a lentiviral vector expressing mutant Krt75-specific shRNA persistently suppressed this phenotype. The phenotypic correction was associated with significant reduction of mutant Krt75 mRNA in the skin grafts. Thus, data obtained from this study demonstrated the feasibility of utilizing RNA interference to achieve durable correction of hair structural phenotypes through allele-specific silencing of the mutant keratin genes.
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Ansar M, Raza SI, Lee K, Irfanullah, Shahi S, Acharya A, Dai H, Smith JD, Shendure J, Bamshad MJ, Nickerson DA, Santos-Cortez RLP, Ahmad W, Leal SM. A homozygous missense variant in type I keratin KRT25 causes autosomal recessive woolly hair. J Med Genet 2015; 52:676-80. [PMID: 26160856 DOI: 10.1136/jmedgenet-2015-103255] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 06/20/2015] [Indexed: 11/04/2022]
Abstract
BACKGROUND Woolly hair (WH) is a hair abnormality that is primarily characterised by tightly curled hair with abnormal growth. METHODS In two unrelated consanguineous Pakistani families with non-syndromic autosomal recessive (AR) WH, homozygosity mapping and linkage analysis identified a locus within 17q21.1-q22, which contains the type I keratin gene cluster. A DNA sample from an affected individual from each family underwent exome sequencing. RESULTS A homozygous missense variant c.950T>C (p.(Leu317Pro)) within KRT25 segregated with ARWH in both families, and has a combined maximum two-point LOD score of 7.9 at ϴ=0. The KRT25 variant is predicted to result in disruption of the second α-helical rod domain and the entire protein structure, thus possibly interfering with heterodimerisation of K25 with type II keratins within the inner root sheath (IRS) of the hair follicle and the medulla of the hair shaft. CONCLUSIONS Our findings implicate a novel gene involved in human hair abnormality, and are consistent with the curled, fragile hair found in mice with Krt25 mutations, and further support the role of IRS-specific type I keratins in hair follicle development and maintenance of hair texture.
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Affiliation(s)
- Muhammad Ansar
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Syed Irfan Raza
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan Department of Biochemistry & Molecular Biology, National University of Science & Technology (NUST), Islamabad, Pakistan
| | - Kwanghyuk Lee
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Irfanullah
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Shamim Shahi
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Anushree Acharya
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Hang Dai
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Joshua D Smith
- Department of Genome Sciences, University of Washington, Seattle, Washington, USA
| | - Jay Shendure
- Department of Genome Sciences, University of Washington, Seattle, Washington, USA
| | - Michael J Bamshad
- Department of Genome Sciences, University of Washington, Seattle, Washington, USA
| | - Deborah A Nickerson
- Department of Genome Sciences, University of Washington, Seattle, Washington, USA
| | - Regie Lyn P Santos-Cortez
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Suzanne M Leal
- Department of Molecular and Human Genetics, Center for Statistical Genetics, Baylor College of Medicine, Houston, Texas, USA
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Abstract
INTRODUCTION Hair loss or alopecia affects the majority of the population at some time in their life, and increasingly, sufferers are demanding treatment. Three main types of alopecia (androgenic [AGA], areata [AA] and chemotherapy-induced [CIA]) are very different, and have their own laboratory models and separate drug-discovery efforts. AREAS COVERED In this article, the authors review the biology of hair, hair follicle (HF) cycling, stem cells and signaling pathways. AGA, due to dihydrotesterone, is treated by 5-α reductase inhibitors, androgen receptor blockers and ATP-sensitive potassium channel-openers. AA, which involves attack by CD8(+)NK group 2D-positive (NKG2D(+)) T cells, is treated with immunosuppressives, biologics and JAK inhibitors. Meanwhile, CIA is treated by apoptosis inhibitors, cytokines and topical immunotherapy. EXPERT OPINION The desire to treat alopecia with an easy topical preparation is expected to grow with time, particularly with an increasing aging population. The discovery of epidermal stem cells in the HF has given new life to the search for a cure for baldness. Drug discovery efforts are being increasingly centered on these stem cells, boosting the hair cycle and reversing miniaturization of HF. Better understanding of the molecular mechanisms underlying the immune attack in AA will yield new drugs. New discoveries in HF neogenesis and low-level light therapy will undoubtedly have a role to play.
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Affiliation(s)
- Zenildo Santos
- Massachusetts General Hospital, Wellman Center for Photomedicine , Boston, MA 02114 , USA +1 617 726 6182 ; +1 617 726 6643 ;
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Duverger O, Ohara T, Shaffer JR, Donahue D, Zerfas P, Dullnig A, Crecelius C, Beniash E, Marazita ML, Morasso MI. Hair keratin mutations in tooth enamel increase dental decay risk. J Clin Invest 2014; 124:5219-24. [PMID: 25347471 DOI: 10.1172/jci78272] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 09/22/2014] [Indexed: 12/20/2022] Open
Abstract
Tooth enamel is the hardest substance in the human body and has a unique combination of hardness and fracture toughness that protects teeth from dental caries, the most common chronic disease worldwide. In addition to a high mineral content, tooth enamel comprises organic material that is important for mechanical performance and influences the initiation and progression of caries; however, the protein composition of tooth enamel has not been fully characterized. Here, we determined that epithelial hair keratins, which are crucial for maintaining the integrity of the sheaths that support the hair shaft, are expressed in the enamel organ and are essential organic components of mature enamel. Using genetic and intraoral examination data from 386 children and 706 adults, we found that individuals harboring known hair disorder-associated polymorphisms in the gene encoding keratin 75 (KRT75), KRT75(A161T) and KRT75(E337K), are prone to increased dental caries. Analysis of teeth from individuals carrying the KRT75(A161T) variant revealed an altered enamel structure and a marked reduction of enamel hardness, suggesting that a functional keratin network is required for the mechanical stability of tooth enamel. Taken together, our results identify a genetic locus that influences enamel structure and establish a connection between hair disorders and susceptibility to dental caries.
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Fan H, Wang X, Jiao F, Zhang F, Wang Q, He P, Fang Y. Scanning Electrochemical Microscopy of DNA Hybridization on DNA Microarrays Enhanced by HRP-Modified SiO2 Nanoparticles. Anal Chem 2013; 85:6511-7. [DOI: 10.1021/ac4011155] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Huajun Fan
- Department
of Chemistry, East China Normal University, Shanghai 200241, P. R. China
| | - Xiaolan Wang
- Department
of Chemistry, East China Normal University, Shanghai 200241, P. R. China
| | - Fang Jiao
- Department
of Chemistry, East China Normal University, Shanghai 200241, P. R. China
| | - Fan Zhang
- Department
of Chemistry, East China Normal University, Shanghai 200241, P. R. China
| | - Qingjiang Wang
- Department
of Chemistry, East China Normal University, Shanghai 200241, P. R. China
| | - Pingang He
- Department
of Chemistry, East China Normal University, Shanghai 200241, P. R. China
| | - Yuzhi Fang
- Department
of Chemistry, East China Normal University, Shanghai 200241, P. R. China
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Bruckner-Tuderman L, Has C. Molecular heterogeneity of blistering disorders: the paradigm of epidermolysis bullosa. J Invest Dermatol 2012; 132 Suppl 3:E2-5. [PMID: 23154626 DOI: 10.1038/skinbio.2012.2] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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The Complexity of Elastic Fiber Biogenesis: The Paradigm of Cutis Laxa. J Invest Dermatol 2012; 132 Suppl 3:E12-4. [DOI: 10.1038/skinbio.2012.4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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