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Sökning: WFRF:(Inerot Annica)

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2.
  • Bergfors, Elisabet, 1945, et al. (författare)
  • Patch testing children with aluminium chloride hexahydrate in petrolatum: A review and a recommendation
  • 2019
  • Ingår i: Contact Dermatitis. - : WILEY. - 0105-1873 .- 1600-0536. ; 81:2, s. 81-88
  • Forskningsöversikt (refereegranskat)abstract
    • Background: According to studies on adults, patch testing with aluminium chloride hexahydrate 2% pet. is insufficient to detect aluminium allergy, and a 10% preparation is recommended. Other studies suggest that a 2% preparation is sufficient for testing children. Objectives: To review three previously published Swedish studies on patch testing children with aluminium chloride hexahydrate 2% pet. Patients/Methods: Altogether, 601 children with persistent itching subcutaneous nodules (granulomas) induced by aluminium-adsorbed vaccines were patch tested with aluminium chloride hexahydrate 2% pet. and metallic aluminium in (a) a pertussis vaccine trial, (b) clinical practice, and (ca) prospective study. Results: Overall, 459 children had positive reactions to the 2% pet. preparation. Another 10 reacted positively only to metallic aluminium. An extreme positive reaction (+++) was seen in 65% of children aged 1 to 2 years as compared with 22% of children aged 7 years. From 8 years onwards, extreme positive reactions were scarce. Conclusions: Aluminium chloride hexahydrate 2% pet. is sufficient to trace aluminium allergy in children. Small children are at risk of extreme reactions. We thus suggest that aluminium chloride hexahydrate 10% pet. should not be used routinely in children before the age of 7 to 8 years.
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3.
  • Bergfors, Elisabet, 1945, et al. (författare)
  • Unexpectedly high incidence of persistent itching nodules and delayed hypersensitivity to aluminium in children after the use of adsorbed vaccines from a single manufacturer
  • 2003
  • Ingår i: Vaccine. - 0264-410X .- 0264-410X. ; 22:1, s. 64-9
  • Tidskriftsartikel (refereegranskat)abstract
    • During trials of aluminium adsorbed diphtheria-tetanus/acellular pertussis vaccines from a single producer, persistent itching nodules at the vaccination site were observed in an unexpectedly high frequency. The afflicted children were followed in a longitudinal observational study, and the presence of aluminium sensitization was investigated in the children with itching nodules and their symptomless siblings by patch tests. Itching nodules were found in 645 children out of about 76,000 vaccinees (0.8%) after both subcutaneous (s.c.) and intramuscular (i.m.) injection. The itching was intense and long-lasting. So far, 75% still have symptoms after a median duration of 4 years. Contact hypersensitivity to aluminium was demonstrated in 77% of the children with itching nodules and in 8% of the symptomless siblings who had received the same vaccines (P<0.001). Children with persistent itching nodules and/or aluminium sensitization should be warned about aluminium containing products (e.g. vaccines and antiperspirants). The reason for the high incidence of itching nodules after SSI vaccines is unknown and should be further investigated.
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5.
  • Enerbäck, Charlotta, 1965, et al. (författare)
  • Cytogenetic analysis of 477 psoriatics revealed an increased frequency of aberrations involving chromosome region 11q
  • 1999
  • Ingår i: Eur J Hum Genet. ; 7:3, s. 339-44
  • Tidskriftsartikel (refereegranskat)abstract
    • Psoriasis is an inflammatory skin disorder affecting approximately 3% of the population. Genetic studies published so far have shown a complex genetic inheritance with heterogeneity and a putative major susceptibility locus in the HLA region on chromosome 6. We have collected a large amount of material consisting mostly of small nuclear families in order to perform a genome-wide scan for psoriasis-associated genes. In order to focus the scan properly on possible candidate regions, we performed a cytogenetic analysis of 477 unrelated psoriatics. We divided our findings into sporadic, affecting a minor fraction of the cells, and constitutional, i.e. they were present in all cells examined. We found three cases of balanced translocation, all of which involved chromosome 11q. Two of these had a breakpoint in q12-13, whilst one involved the telomeric part of chromosome 11q. In order to characterise further the breakpoint on 11q12-13, we used bacterial artificial chromosomes (BACs) analysed by fluorescent in situ hybridisation (FISH). We were able to show that the persons had a close, but not identical breakpoints; they were separated by at least 5 cM. The major atopy locus is located in this region, as well as a locus for insulin-dependent diabetes mellitus, both being conditions with a pathogenetic mechanism involving antigen presentation.
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6.
  • Enerbäck, Charlotta, 1965, et al. (författare)
  • Evidence that HLA-Cw6 determines early onset of psoriasis, obtained using sequence-specific primers (PCR-SSP)
  • 1997
  • Ingår i: Acta Derm Venereol. ; 77:4, s. 273-6
  • Tidskriftsartikel (refereegranskat)abstract
    • Psoriasis vulgaris has previously been shown to associate with certain HLA alleles. HLA-Cw6 is considered to be the primary association, based on calculations of relative risk after serological typing. This association is reportedly more pronounced in early- than in late-onset psoriasis. We performed a PCR-based typing with sequence-specific primers, which has been shown to give a more complete result than serology. Two hundred and one unrelated patients with psoriasis, with a mean age of 40 years, and 77 healthy controls were typed. Two thirds (67%) of the patients were positive for one or two copies of the allele, while the corresponding figure for the control group was 12%. A significant peak for age at onset of 21 or younger was seen for the Cw6 carriers. For patients older than 21 at onset, the frequency of Cw6 was significantly lower; e.g. for patients with an age at onset between 30 and 35 the frequency was comparable to the level of the control group. The high frequency of Cw6 among patients with an age at onset of 21 or younger is in agreement with data of other groups. In comparison with this age-at-onset group the frequency of Cw6 is sharply reduced among patients with an age at onset of 22 years or older, which contrasts with earlier studies. This may reflect differences between population groups but may also be due to the higher sensitivity of the PCR-based HLA-Cw6 typing method. In view of these findings, we suggest that psoriasis is a genetically determined disease, in which the additional presence of HLA-Cw6 is associated with the characteristic of early onset.
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7.
  • Enerbäck, Charlotta, 1965, et al. (författare)
  • S gene (Corneodesmosin) diversity and its relationship to psoriasis; high content of cSNP in the HLA-linked S gene
  • 2000
  • Ingår i: J Invest Dermatol. - 0022-202X .- 0022-202X. ; 114:6, s. 1158-63
  • Tidskriftsartikel (refereegranskat)abstract
    • Psoriasis is a heterogeneous disease in which several reports suggest the presence of a susceptibility gene in or in the proximity of the human leukocyte antigen complex in chromosome 6p. There is an association between HLA-Cw6 and young onset of the disease. The S gene (corneodesmosin), located 160 kb telomeric of HLA-C, is a strong candidate for psoriasis due to its reportedly exclusive expression in differentiating keratinocytes. We have studied this gene in a large Swedish psoriasis population and we report a strikingly high degree of polymorphism in the coding parts of the gene, 1 every 100 base pairs. We used a stratified approach to compare the polymorphic variants in patients and controls. A single nucleotide polymorphism in the coding region leading to an amino acid exchange (Ser-->Phe) that differed significantly between patients and controls was identified (position 619). Owing to a high allele frequency in a larger control group, however, and an insignificant influence of the variant on the age at onset distribution curve based on a large psoriasis population, we could not confirm that this coding single nucleotide polymorphism was involved in disease etiology. We also examined the single nucleotide polymorphism in position 1243, recently proposed to have an influence on the pathogenesis of the disease. This polymorphism showed less association to the disease as compared with the single nucleotide polymorphism at positions 619 and 722. Such a high degree of variation present also in an HLA gene which is not involved in immune response indicates the difficulty involved in assessing the role of a specific allele in the pathogenesis of a complex disease in this region. A strong association effect due to linkage disequilibrium in an extended region in the HLA complex is also a complicating factor.
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8.
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9.
  • Enerbäck, Charlotta, 1965, et al. (författare)
  • Stronger association with HLA-Cw6 than with corneodesmosin (S-gene) polymorphisms in Swedish psoriasis patients.
  • 2000
  • Ingår i: Archives of dermatological research. - : Springer Science and Business Media LLC. - 0340-3696 .- 1432-069X. ; 292:11, s. 525-30
  • Tidskriftsartikel (refereegranskat)abstract
    • Psoriasis vulgaris is strongly associated with certain human leukocyte antigens, especially in early onset. The purpose of this study was to study the HLA-Cw6 allele and its contribution to disease susceptibility in a set of 104 families with at least two affected siblings. A sequencing method was utilized to examine the two exons that build up the antigen binding site of the C locus receptor. DNA from patients homozygous for Cw6 based on haplotype information were sequenced. The results confirmed the identity of the Cw6 allele in affected individuals with the consensus sequence for Cw*0602. We screened the set of families for psoriasis patients homozygous for Cw6 and found 11 individuals with a mean age at onset of 16.1 years. The corresponding figure for the Cw6 heterozygotes was 18.45 years and for the Cw6-negatives 22.36 years. This is indicative of a gene dose effect. We performed a transmission disequilibrium test (TDT) on the Cw6 allele per se, used as a biallelic marker. The analysis resulted in a P-value of 5.3 x 10(-17) (t167/nt45). This greatly exceeds our previous results of a TDT in the region, including microsatellite markers and single nucleotide polymorphisms (SNPs) in the coding part of the S gene (corneodesmosin), which is a suggested candidate gene in the region. The maximum nonparametric linkage (NPL) value was also reached using HLA-C as a marker. We conclude that Cw6 is the allele which shows the highest degree of association with psoriasis in our set of families and we propose that it directly influences the age at onset of the disease rather than increasing the genetic load in accordance with a polygenic theory.
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10.
  • Enlund, Fredrik, 1968, et al. (författare)
  • Analysis of three suggested psoriasis susceptibility loci in a large Swedish set of families: confirmation of linkage to chromosome 6p (HLA region), and to 17q, but not to 4q
  • 1999
  • Ingår i: Hum Hered. ; 49:1, s. 2-8
  • Tidskriftsartikel (refereegranskat)abstract
    • Psoriasis is known to be a heterogeneous disease with so far three reported major psoriasis susceptibility loci on chromosome 4q, 6p and 17q. In this study we investigated three reported gene locations by nonparametric and parametric linkage analysis in a large family set consisting of 104 families (153 sib pairs) from Sweden. We could confirm linkage to chromosome 6p. A maximum heterogeneous lod score of 2.78 was reached at locus D6S276 (alpha = 0.60). Allelic association studies within the HLA region indicated linkage disequilibrium at locus TNFbeta with a significant p value of 0.0009. Furthermore, we obtained weak evidence of linkage to the locus on chromosome 17q while no evidence of linkage could be found to the chromosome 4q region.
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