Association between NDO-LID and PGL-1 for leprosy and class I and II human leukocyte antigen alleles in an indigenous community in Southwest Amazon
Braz. j. infect. dis
;
24(4): 296-303, Jul.-Aug. 2020. tab
Article
in English
| LILACS, CONASS, ColecionaSUS, SES-SP, HANSEN, HANSENIASE, SESSP-ILSLPROD, SES-SP, SESSP-ILSLACERVO, SES-SP
| ID: biblio-1132457
ABSTRACT
The frequencies of the Human leukocyte antigen (HLA) alleles in the Puyanawa indigenous reserve population and their association with the NDO-LID and ELISA PGL-1 rapid serological test was assessed. This was a cross-sectional study with an epidemiological clinical design conducted in two indigenous communities in the state of Acre, Brazil. Blood was collected in a tube with EDTA to identify HLA alleles and perform serological tests. DNA was obtained using the salting out procedure. The LabType™ technique (One-Lambda-USA) was used for HLA class I (loci A*, B* and C*) and II (loci DRB1*, DQA1* and DQB1*) typing. Allele frequency was obtained by direct count, and the chi-square test was used to assess the association with the NDO-LID and PGL-1 tests. The most frequent alleles in the two communities were HLA-A*0201, HLA-B*4002, HLA-DRB1*1602, HLA-DQA1*0505 and HLA-DQB1*0301. The allele HLA-C*0401 was the most common in the Barão community, and the allele HLA-C*0701 in Ipiranga. Among individuals who presented seropositivity to the NDO-LID test, the association with alleles HLA-A*02 (43.18% vs 24.8%, p = 0.03, OR = 2.35) and HLA-B*53 (6.83% vs 0.0%, p = 0.03, OR = 8.95) was observed in the Barão community. HLA-B*15 was associated with non-seroconversion to the NDO-LID test in Ipiranga. In both communities, HLA-B*40 and HLA-C*03 were associated with positive serological response to ELISA PGL-1. The HLA class I and II alleles most frequently found in this study have already been described among Terena indigenous groups, and HLA class I contributes to seroconversion to NDO-LID and PGL-1 tests in inhabitants of the Barão and Ipiranga communities(AU).
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Alleles
/
Health of Indigenous Peoples
/
HLA-DRB1 Chains
/
Gene Frequency
/
Leprosy
Type of study:
Diagnostic study
/
Etiology study
/
Observational study
/
Prevalence study
/
Prognostic study
/
Risk factors
Limits:
Female
/
Humans
/
Male
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Braz. j. infect. dis
Year:
2020
Type:
Article
Institution/Affiliation country:
Instituto Lauro de Souza Lima/BR
/
Universidade Federal de São Paulo/BR
/
Universidade Federal do Acre/BR
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