Xiuyan Li1, Mingfei Chen2, Xi'an Fu2, Qilin Zhang3, Zhenzhen Wang2, Gongqi Yu2, Yongxiang Yu2, Peipei Qin1, Weizhi Wu4, Futang Pan4, Hong Liu5, Furen Zhang6. 1. Shandong Provincial Institute of Dermatology and Venereology, Shandong Academy of Medical Sciences, Jinan, Shandong, China; Shandong Provincial Key Lab for Dermatovenereology, Jinan, Shandong, China; School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences, Jinan, Shandong, China. 2. Shandong Provincial Institute of Dermatology and Venereology, Shandong Academy of Medical Sciences, Jinan, Shandong, China; Shandong Provincial Key Lab for Dermatovenereology, Jinan, Shandong, China. 3. School of Medicine, Shandong University, Jinan, Shandong, China. 4. Shandong Provincial Hospital for Skin Diseases, Shandong University, Jinan, Shandong, China; Shandong Provincial Medical Center for Dermatovenereology, Jinan, Shandong, China. 5. Shandong Provincial Institute of Dermatology and Venereology, Shandong Academy of Medical Sciences, Jinan, Shandong, China; Shandong Provincial Key Lab for Dermatovenereology, Jinan, Shandong, China; Shandong Provincial Hospital for Skin Diseases, Shandong University, Jinan, Shandong, China; Shandong Provincial Medical Center for Dermatovenereology, Jinan, Shandong, China. 6. Shandong Provincial Institute of Dermatology and Venereology, Shandong Academy of Medical Sciences, Jinan, Shandong, China; Shandong Provincial Key Lab for Dermatovenereology, Jinan, Shandong, China; Shandong Provincial Hospital for Skin Diseases, Shandong University, Jinan, Shandong, China; Shandong Provincial Medical Center for Dermatovenereology, Jinan, Shandong, China. Electronic address: zhangfuren@hotmail.com.
Abstract
BACKGROUND: Generalized pustular psoriasis (GPP) is a rare type of psoriasis with potentially life-threatening implications. Mutations in IL36RN gene have been suggested to be causative or predisposing factors for GPP. OBJECTIVE: To evaluate the genetic heterogeneity of GPP, PV and GPP alone, GPP with PV. METHODS: We performed a sanger sequencing identify IL36RN mutations in 62 Chinese Han patients with sporadic GPP, including 17 GPP without psoriasis vulgaris (PV) (GPP alone) cases vs. 45 GPP with preceding, later or accompanied by PV (GPP with PV) cases; 16 patients with pediatric-onset GPP (PGPP) vs. 46 adult-onset GPP (AGPP). We included 96 healthy controls and 174 sporadic patients with PV. RESUTS: We found 2 new variants and 4 known IL36RN variants in 29 GPP patients, 18 individuals carried recessive (homozygous/compound heterozygous) alleles and 11 cases harbored a single heterozygous change. Twelve PV patients and six controls harbored a single heterozygous for three out of the six variants. Significant differences were observed between GPP and PV groups, GPP alone and GPP with PV groups when compared frequencies of IL36RN variants, but we did not found association between PGPP and AGPP groups. CONCLUSION: Our study provided more evidence that GPP and PV are distinct subtypes of psoriasis caused by different pathogenesis, and GPP alone could be regarded as an especial entities of GPP which is different from GPP with PV on the etiology.
BACKGROUND: Generalized pustular psoriasis (GPP) is a rare type of psoriasis with potentially life-threatening implications. Mutations in IL36RN gene have been suggested to be causative or predisposing factors for GPP. OBJECTIVE: To evaluate the genetic heterogeneity of GPP, PV and GPP alone, GPP with PV. METHODS: We performed a sanger sequencing identify IL36RN mutations in 62 Chinese Han patients with sporadic GPP, including 17 GPP without psoriasis vulgaris (PV) (GPP alone) cases vs. 45 GPP with preceding, later or accompanied by PV (GPP with PV) cases; 16 patients with pediatric-onset GPP (PGPP) vs. 46 adult-onset GPP (AGPP). We included 96 healthy controls and 174 sporadic patients with PV. RESUTS: We found 2 new variants and 4 known IL36RN variants in 29 GPP patients, 18 individuals carried recessive (homozygous/compound heterozygous) alleles and 11 cases harbored a single heterozygous change. Twelve PV patients and six controls harbored a single heterozygous for three out of the six variants. Significant differences were observed between GPP and PV groups, GPP alone and GPP with PV groups when compared frequencies of IL36RN variants, but we did not found association between PGPP and AGPP groups. CONCLUSION: Our study provided more evidence that GPP and PV are distinct subtypes of psoriasis caused by different pathogenesis, and GPP alone could be regarded as an especial entities of GPP which is different from GPP with PV on the etiology.
Authors: Rajkumar Ganesan; Ernest L Raymond; Detlev Mennerich; Joseph R Woska; Gary Caviness; Christine Grimaldi; Jennifer Ahlberg; Rocio Perez; Simon Roberts; Danlin Yang; Kavita Jerath; Kristopher Truncali; Lee Frego; Eliud Sepulveda; Priyanka Gupta; Su-Ellen Brown; Michael D Howell; Keith A Canada; Rachel Kroe-Barrett; Jay S Fine; Sanjaya Singh; M Lamine Mbow Journal: MAbs Date: 2017-07-20 Impact factor: 5.857