CFTR allelic heterogeneity in Brazil: historical and geographical perspectives and implications for screening and counseling for cystic fibrosis in this country.
The goal of the present study was to provide a complete and updated spectrum of cystic fibrosis (CF) transmembrane conductance regulator (CFTR) gene mutations in the Brazilian population combining all available in silico data for patients with CF in Brazil, including founder background and migration flow that consisted of the actual genetic pool of the Brazilian population. Information sources in international databases (PUBMED and SCIELO) were searched. The Brazilian population shows a wide variation in the frequency of CFTR mutations in states Rio Grande do Sul (RS), Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ), Minas Gerais (MG), Pará (PA) and Bahia (BA); this variation includes the most common mutation p.F508del. Apparently, this frequency variation is because of the different ethnic compositions. States such as SC and PR have a greater European admixture with almost 90% of CF alleles identified. In other states, such as BA, higher frequency of alleles that are common among African populations is seen. Overall, the CFTR mutational spectrum indicates the presence of European, African and Amerindian ethnic groups in the contemporary Brazilian CF patients. Here, we present an analysis of the CFTR allelic heterogeneity and discuss the origin of its genetic composition, in an attempt to provide improved perspective for the CF population screening in Brazil and genetic counseling.
Faucz
Fabio R
FR
Center for Health and Biological Sciences, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil. fabio.faucz@pucpr.br
Souza
Denise A S
DA
Olandoski
Marcia
M
Raskin
Salmo
S
D044383:Black People / Q000235:genetics; D001938:Brazil / Q000453:epidemiology; D019295:Computational Biology; D003550:Cystic Fibrosis / Q000453:epidemiology* / Q000208:ethnology / Q000235:genetics*; D019005:Cystic Fibrosis Transmembrane Conductance Regulator / Q000235:genetics*; D004641:Emigration and Immigration; D018740:Genetic Heterogeneity; D005820:Genetic Testing / Q000706:statistics & numerical data; D006801:Humans; D007199:Indians, South American / Q000235:genetics; D009154:Mutation / Q000235:genetics*; D044465:White People / Q000235:genetics
C505032:CFTR protein, human; D019005:Cystic Fibrosis Transmembrane Conductance Regulator