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排序方式: 共有95条查询结果,搜索用时 15 毫秒
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2.
B. C. J. Hamel R. Happle P. M. Steylen L. A. A. Kolle J. H. Schuurmans Stekhoven J. G. Nijhuis R. Rauskolb I. Anton-Lamprecht 《American journal of medical genetics. Part A》1992,44(6):824-826
Restrictive dermopathy is a rare autosomal recessive lethal skin dysplasia. It has been assumed that the characteristic morphologic abnormalities should allow a reliable prenatal diagnosis on fetal skin biopsies at about 20 weeks pregnancy. We report on a false-negative prenatal diagnosis. © 1992 Wiley-Liss, Inc. 相似文献
3.
Winberg JO; Hammami-Hauasli N; Nilssen O; Anton-Lamprecht I; Naylor SL; Kerbacher K; Zimmermann M; Krajci P; Gedde-Dahl T Jr; Bruckner-Tuderman L 《Human molecular genetics》1997,6(7):1125-1135
Dystrophic epidermolysis bullosa (EBD) is a clinically heterogeneous skin
disorder, characterized by abnormal anchoring fibrils (AF) and loss of
dermal-epidermal adherence. EBD has been linked to the COL7A1 gene at
chromosome 3p21 which encodes collagen VII, the major component of the AF.
Here we investigated two unrelated EBD families with different clinical
phenotypes and novel combinations of recessive and dominant COL7A1
mutations. Both families shared the same recessive heterozygous 14 bp
deletion at the exon-intron 115 boundary of the COL7A1 gene. The deletion
caused in-frame skipping of exon 115 and the elimination of 29 amino acid
residues from the pro-alpha1(VII) polypeptide chain. As a result,
procollagen VII was not converted to collagen VII and the C-terminal NC-2
propeptide which is normally removed from the procollagen VII prior to
formation of the anchoring fibrils was retained in the skin. All affected
individuals also carried missense mutations in exon 73 of COL7A1 which lead
to different glycine- to-arginine substitutions in the triple-helical
domain of collagen VII. Combination of the deletion mutation with a G2009R
substitution resulted in a mild phenotype. In contrast, combination of the
deletion with a G2043R substitution led to a severe phenotype. The G2043R
substitution was a de novo mutation which alone caused a mild phenotype.
Thus, different combinations of dominant and recessive COL7A1 mutations can
modulate disease activity of EBD and alter the clinical presentation of the
patients.
相似文献
4.
Ultrastructure of first trimester chorionic villi with regard to the prenatal diagnosis of genodermatoses 总被引:1,自引:0,他引:1
Hopes are held out for chorion villus sampling, a technique which is gaining more and more importance for the first trimester prenatal diagnosis of chromosomal aberrations and metabolic abnormalities. A variety of inherited skin diseases can be diagnosed postnatally and prenatally (in the second trimester) by ultrastructural diagnostic markers. For evaluation of prenatal diagnosis in the first trimester, we investigated chorionic villi derived from the trophoblast layer of the early pregnancy by light microscopy and conventional electron microscopy. The ultrastructure of the cellular layers covering the villi, i.e., the inner cytotrophoblast and the outer syncytiotrophoblast, as well as that of the connective tissue of the inner extraembryonic mesoderm, are thoroughly described in relation to the ultrastructural changes in certain genodermatoses including epidermolyses and keratinization disorders. We found that chorionic villi have only a few of the characteristics differentiated in skin, and none of the structures which are relevant to the diagnosis of genodermatoses. In our view, the ultrastructural approach is not suitable for first trimester prenatal diagnosis of genodermatoses in chorionic villi. 相似文献
5.
Koss-Harnes D Høyheim B Anton-Lamprecht I Gjesti A Jørgensen RS Jahnsen FL Olaisen B Wiche G Gedde-Dahl T 《The Journal of investigative dermatology》2002,118(1):87-93
Plectin is one of the largest and most versatile cytolinker proteins known. In basal keratinocytes it links the intermediate filament network to cell membrane-associated hemidesmosomes. Several mutations in its gene have been identified that lead to the recessive disease epidermolysis bullosa with muscular dystrophy. We report here a mutation that leads to a dominant form of the disease, epidermolysis bullosa simplex Ogna. We found that the epidermolysis bullosa simplex Ogna phenotype is due to a site-specific missense mutation within plectin's rod domain. Further, we show that epidermolysis bullosa simplex Ogna is not restricted to a single Norwegian kindred as previously believed. A German family with the phenotypic hallmarks of epidermolysis bullosa simplex Ogna was found to carry an identical de novo mutation. These two mutations arose about 200 y apart in time. Consistent with the absence of muscular symptoms in these patients, muscle biopsies from several epidermolysis bullosa simplex Ogna members of the Norwegian kindred showed normal staining patterns using antibodies to plectin. Skin changes in epidermolysis bullosa simplex Ogna patients are documented on the ultrastructural level. 相似文献
6.
Friedrich A. Bahmer M.D. Lingrun Anton-Lamprecht M.D. 《International journal of dermatology》1983,22(3):165-170
This paper reports a case of malignant syphilis (man, 39 years old) in whom ultrastructural investigations of a typical nodule revealed an extremely low amount of bacteria with the characteristics of Treponema pallidum in poorly differentiated cells of the dermal infiltrate with plasma cells, stimulated lymphocytes, and neutrophils as predominating cell types. Most of the microorganisms bore signs of disintegration. Vascular changes and exocytosis were only demonstrable by light microscopy in a second nodule. Together with the high production rate of immunoglobulins and an excessive inflammatory reaction, these findings point to an aberrant biologic reaction pattern of those patients who develop malignant syphilis. Unfortunately, further investigations concerning a possible impairment of cellular immunity as supposed in the literature, had not been possible in the present case. 相似文献
7.
I. Haußer I. Anton-Lamprecht W. Hartschuh D. Petzoldt 《Archives of dermatological research》1989,281(3):165-172
Summary A young female patient, expressing the symptom triad of Netherton's syndrome, i.e., ichthyosis linearis circumflexa Comèl, trichorrhexis invaginata and other hair shaft defects, and atopic diathesis, has been treated successfully with the new retinoid preparation Etretin. Our electron microscopical study especially focused on the ultrastructural effect on the characteristic, active part of the skin lesions, which is only found within a narrow borderline just preceding the lesion's margin. In untreated skin, this part is characterized by dermal inflammation, immigrating inflammatory cells, and specific keratinization disturbances: synthesis of keratinization proteins is suppressed, serum exudates invade the epidermis, either filling the intercellular spaces of the upper spinous and the granular layer as finely granular, amorphous material, or they are partly phagocytosed and lie within intracellular, round-oval inclusions. The portions of the lesions lying towards the center are unspecific and represent recovery stages, ultrastructurally resembling stages of normal wound repair. Oral therapy with Etretin did not heal the basic defect, but drastically reduced exoserosis and the deposition of intra- and extracellular material. Keratinization seemed to normalize. The condition of the hair was also improved. 相似文献
8.
Arin MJ Longley MA Anton-Lamprecht I Kurze G Huber M Hohl D Rothnagel JA Roop DR 《The Journal of investigative dermatology》1999,112(4):506-508
Epidermolytic hyperkeratosis is characterized by tonofilament clumping, cytolysis, and blister formation in suprabasal keratinocytes. It has been shown that the tonofilament aggregates in these areas are composed of keratin 1 (K1) and keratin 10 (K10), and several K1 and K10 point mutations have been identified as the molecular basis of epidermolytic hyperkeratosis. In this report we identify a novel, single base pair substitution resulting in an amino acid exchange from tyrosine to serine at residue 14 within the conserved 1A region of K10 (Y14S). This A to C transversion in codon 160 was only present in the affected individual and was associated with a very severe disease phenotype. Our observations are in agreement with previous reports documenting that this tyrosine residue, located at the beginning of the rod domain of type I keratins, is particularly sensitive to amino acid substitutions, and that alterations in this residue can have deleterious effects on filament assembly and stability. 相似文献
9.
A mutational hot spot in keratin 10 (KRT 10) in patients with epidermolytic hyperkeratosis 总被引:2,自引:0,他引:2
Rothnagel Joseph A.; Fisher Monte P.; Axtell Shelli M.; Pittelkow Mark R.; Anton-Lamprecht Ingrun; Huber Marcel; Hohl Daniel; Roop Dennis R. 《Human molecular genetics》1993,2(12):2147-2150
Epidermolytic hyperkeratosis (EHK), (bullous congenital ichthyosiformerythroderma), is an autosomal dominant human skin disorder.Recently, we and others have described mutations in keratins1 and 10 (K1 and K10) in patients with this disease. Structure-functionmodels predict that these mutations would impair normal filamentassembly and function. We have extended our earlier studiesto include 8 more incidences of EHK. In half of these families,we were unable to locate a mutation within the rod domains ofeither K1 or K10. However, polymorphic restriction site andsequence analysis of the other families revealed a mutationalhot spot within the 1A alpha-helical segment of K10. These involveArginine to Histidine, Arginine to Cysteine and Arginine toLeucine substitutions at residue 10 of the rod domain. Interestingly,mutations in the corresponding Arginine residue in keratin K14have been identified in patients with epidermolysis bullosasimplex. The large number of mutations found at this positionin both keratins K10 and K14 suggests that other epithelia celldisorders will be discovered that are caused by the correspondingmutation in related type I keratin genes. 相似文献
10.