1.Mapping of pathogenic genes in a pedigree with autosomal dominant ichthyosis vulgaris.
Zheng-mao HU ; Zhi-guo XIE ; Ling-qian WU ; De-sheng LIANG ; Hai-yan ZHU ; Qian PAN ; Zhi-ga LONG ; He-ping DAI ; Jia-hui XIA ; Kun XIA
Acta Academiae Medicinae Sinicae 2007;29(3):302-306
OBJECTIVETo elucidate the pathogenic genes in a pedigree with autosomal dominant ichthyosis vulgaris (IV).
METHODSLinkage analysis was performed by using STR markers in chromosome 1, and mutation detection was used to screen for FLG gene mutation.
RESULTSA maximum two-point Lod score of 3.46 (theta=0) was obtained at D1S2696. Haplotype analysis placed the critical region in a 15-CM interval defined by D1S2726 and D1S305, but no mutation of FLG was found in our IV patients.
CONCLUSIONThe pathologic gene of the IV family locates near D1S2696, and the FLG gene may not ruled out from the pathologic genes.
Female ; Humans ; Ichthyosis Vulgaris ; genetics ; Male ; Pedigree
2.Ichthyosis vulgaris: a pedigree with 13 cases.
Chinese Journal of Medical Genetics 2017;34(3):397-397
Adult
;
Child, Preschool
;
Female
;
Humans
;
Ichthyosis Vulgaris
;
genetics
;
Infant
;
Male
;
Mutation
;
Pedigree
3.11 cases of ichthyosis vulgaris from a family.
Qingli QUAN ; Fan WU ; Haiou JIANG
Chinese Journal of Medical Genetics 2016;33(2):220-220
Adult
;
China
;
Female
;
Humans
;
Ichthyosis Vulgaris
;
diagnosis
;
genetics
;
Male
;
Middle Aged
;
Pedigree
;
Young Adult
4.Mutation analysis of FLG gene in 10 Chinese families with ichthyosis vulgaris.
Yong GU ; Minhua SHAO ; Xufeng DU ; Ming LI ; Hejian SHI ; Guolong ZHANG
Chinese Journal of Medical Genetics 2013;30(3):257-260
OBJECTIVETo detect FLG gene mutations in 10 families affected with ichthyosis vulgaris and to explore mutational hot spot of the FLG gene in Chinese Han population.
METHODSPCR and direct sequencing were carried out to identify potential mutations of the FLG gene in above families. One hundred healthy individuals were analyzed as normal controls.
RESULTSThree mutations (3321delA, 5757delCCAG and S2706X) were identified in 7 families. A homozygous mutation 3321delA was also detected in two unrelated patients. No mutations were found in the remaining three families. Neither of the null mutations (5757delCCAG and S2706X) was found in the 100 controls. However, for 3321delA, a heterozygous mutation was also found in two of the controls.
CONCLUSIONThree FLG mutations have been identified in the selected families with ichthyosis vulgaris, and the 3321delA mutation was most prevalent (46.9%). Mutations 5757delCCAG and S2706X were first found in patients with ichthyosis vulgaris. Other candidate genes may underlie the disease in those without a FLG mutation.
Asian Continental Ancestry Group ; Base Sequence ; China ; Female ; Genotype ; Humans ; Ichthyosis Vulgaris ; genetics ; Intermediate Filament Proteins ; genetics ; Male ; Mutation ; Pedigree ; Phenotype
5.Novel missense mutations of the FLG gene identified in two Chinese families affected with ichthyosis vulgaris.
Qiguo ZHANG ; ; Yao YANG ; Liangqi CAI ; Yijin HUANG ; Yan DUAN ; Yanhua LIANG
Chinese Journal of Medical Genetics 2016;33(5):645-648
OBJECTIVETo identify potential mutations of the FLG gene in two Chinese families affected with ichthyosis vulgaris.
METHODSAll coding exons and exon-intron boundary of the FLG gene were amplified by polymerase chain reaction (PCR) and analyzed by direct sequencing. The results were compared with those of 100 unrelated healthy controls.
RESULTSTwo novel missense mutations, c.1360A>G (p.T454A) and c.10363G>T (p.D3455Y), were detected in all affected individuals from family 1 and family 2 respectively but none of the controls.
CONCLUSIONThe c.1360A>G (p.T454A) and c.10363G>T (p.D3455Y) of the FLG gene may lead to alteration of the structure and function of the FLG protein and cause ichthyosis vulgaris in the two families.
Asian Continental Ancestry Group ; genetics ; Base Sequence ; China ; DNA Mutational Analysis ; Exons ; genetics ; Family Health ; Female ; Genetic Predisposition to Disease ; ethnology ; genetics ; Humans ; Ichthyosis Vulgaris ; ethnology ; genetics ; Intermediate Filament Proteins ; genetics ; Introns ; genetics ; Male ; Mutation, Missense ; Pedigree
6.An Analysis of the Filaggrin Gene Polymorphism in Korean Atopic Dermatitis Patients.
Kui Young PARK ; Kapsok LI ; Joon SEOK ; Seong Jun SEO
Journal of Korean Medical Science 2016;31(7):1136-1142
Research of the FLG mutation in various ethnic groups revealed non-overlapping mutation patterns. In addition, Japanese and Chinese atopic patients showed somewhat different mutations. These ethnic differences make the research on Korean patients mandatory; however, no systematic research on Korean atopic dermatitis (AD) patients has been performed. This study aims to investigate the genetic polymorphism of FLG in Korean atopic dermatitis patients. The study was made up of three groups including 9 Ichthyosis vulgaris (IV) patients, 50 AD patients and 55 normal controls: the ichthyosis group was incorporated due to the reported association between the FLG mutation and IV. In comparison to other sequencing methods, the overlapping long-range PCR was used. We revealed the genetic polymorphism of filaggrin in Koreans, and at the same time, we discovered nonsense mutations in p.Y1767X and p.K4022X in Korean AD patients. By using FLG sequencing techniques confirmed in this study, new mutations or genetic polymorphisms with ethnic characteristics would be detected and further larger studies of repeat number polymorphisms could be performed.
Adult
;
Alleles
;
Asian Continental Ancestry Group/*genetics
;
Base Sequence
;
Codon, Nonsense
;
DNA/blood/chemistry/metabolism
;
DNA Mutational Analysis
;
Dermatitis, Atopic/*genetics
;
Female
;
Genotype
;
Heterozygote
;
Humans
;
Ichthyosis Vulgaris/genetics
;
Intermediate Filament Proteins/*genetics
;
Male
;
Polymerase Chain Reaction
;
Polymorphism, Single Nucleotide
7.Clinical features of the nephrotic syndrome associated with ichthyosis vulgaris and analysis of related gene mutation.
Zhi-hui LI ; Tian-hui WU ; Cui-rong DUAN ; Mai XUN ; Yi ZHANG ; Yan YIN ; Li-qiong ZHANG
Chinese Journal of Pediatrics 2010;48(1):44-49
OBJECTIVETo study clinical features of 3 children who presented with nephrotic syndrome (NS) associated with ichthyosis vulgaris (IV), and to detect relationship between NS associated with IV in patients and FLG gene or NPHS2 gene.
METHODClinical and kidney pathological data of the 3 patients were analyzed and progress of pathologic damage in the patient kidney was observed through repeated percutaneous renal biopsy. Using polymerase chain reaction-single strand conformation polymorphism and DNA sequencing, the diversity of the expression of NPHS2 gene in the 3 patients were analyzed, and FLG gene in the 3 patients and parts of their family members with IV was detected.
RESULT(1) The age of the 3 patients (patient 1 was a girl and patients 2 and 3 were boys) suffering from NS was 3 years and 8 months, 2 years and 6 months, and 5 years and 3 months, respectively. The age of onset of IV was 1 year and 6 months, 10 months, and 2 years and 6 months, respectively. All the 3 patients were resistant to steroid therapy. Despite multi-immunosuppressive therapy, no clinical response was achieved. The patients were followed up for 1.5 to 4.0 years. The patients displayed continuous proteinuria, renal function was normal, but their heights were lower than other children at the same age. (2) The older brother of patient 1 died of uremia. The other patients' family members did not have kidney disease. (3) Renal histopathology showed that the patients 1 and 2 had mild mesangial proliferative glomerulonephritis (MsPGN) and the patient 3 had minimal change disease (MCD). One and a half years after the first renal biopsy, the patients 1 and 2 underwent repeated renal biopsy. Renal histopathology showed that the 2 patients' disease developed to medium MsPGN. (4) None of the 3 patients had NPHS2 gene mutation. All the three patients had R501X and 2282del4 which are the common gene mutation type of the FLG, and all the patients were heterozygote. With the detection of the FLG gene of the part of the patients of the three families, the second patient's grandfather had the R501X homozygote mutation and the others were the R501X heterozygote mutation and 2282del4 heterozygote mutation.
CONCLUSIONThe 3 cases of NS associated with IV had no response to steroid and multi-immunosuppressive therapy, the renal damage observed by histopathology progressed fast. The children with NS associated with IV displayed R501X heterozygote mutation and 2282del4 heterozygote mutation of FLG gene, which suggested that the absence of response to steroid and multi-immunosuppressive therapy may be related to the FLG gene.
Child, Preschool ; DNA Mutational Analysis ; Female ; Humans ; Ichthyosis Vulgaris ; complications ; genetics ; Infant ; Intracellular Signaling Peptides and Proteins ; genetics ; Kidney ; pathology ; Male ; Membrane Proteins ; genetics ; Mutation ; Nephrotic Syndrome ; complications ; genetics ; Pedigree