ABCMdb

PMID: 12938099

Keyeux G, Rodas C, Bienvenu T, Garavito P, Vidaud D, Sanchez D, Kaplan JC, Aristizabal G
CFTR mutations in patients from Colombia: implications for local and regional molecular diagnosis programs.
Hum Mutat. 2003 Sep;22(3):259., [PubMed]

Sentences

No. Mutations Sentence Comment

8 ABCC7 p.Trp1282* ABCC7 p.Gly542* ABCC7 p.Arg1162* ABCC7 p.Ser549Arg The results of this pilot study in Colombian patients from various ethnic admixture show six main mutations: p.F508del (41.8%), c.1811+1.6kbA>G (6.5%), p.G542X (3.8%), p.S549R (2.2%), p.W1282X (1.1%) and p.R1162X (1.1%). Login to comment 38 ABCC7 p.Gly542* The second and third mutations in frequency in Colombian patients are c.1811+1.6kbA>G (6.5%) and p.G542X (3.8%), respectively. The distribution of these mutations over the country is heterogeneous, since, for instance, most c.1811+1.6kbA>G chromosomes are found in Bogotá (10.5%), whereas some Departments do not exhibit this mutation. Login to comment 43 ABCC7 p.Ser549Arg The fourth mutation is p.S549R (T to G at position 1779), present on 4 chromosomes (2.2%). Login to comment 45 ABCC7 p.Trp1282* ABCC7 p.Arg1162* Screening of further two mutations, p.R1162X and p.W1282X (exons 19 and 20, respectively) increases the detection power to 57%, whereas a laborious search for other rare mutations all over the CFTR coding region only increases the detection level another 6% (12 different mutations) (Table 1). Login to comment 50 ABCC7 p.Trp1282* ABCC7 p.Arg334Trp ABCC7 p.Asn1303Lys ABCC7 p.Gly542* ABCC7 p.Arg1162* ABCC7 p.Ser549Arg ABCC7 p.Arg1066Cys ABCC7 p.Tyr1092* ABCC7 p.Ala559Thr CFTR Mutation Frequencies in Colombian Cystic Fibrosis Patients MUTATION ANTIOQUIA BOGOTA BOLIVAR CALDAS VALLE OTHER COLOMBIA n=34 n=76 n=20 n=10 n=24 n=20 n=184 N (%) N (%) N (%) N (%) N (%) N (%) N (%) p.F508del 16 (47.1) 31 (40.8) 5 (25) 6 (60.0) 10 (41.7) 9 (45.0) 77 (41.8) c.1811+1.6KbA>G 0 8 (10.5) 2 (10.0) 0 1 (4.2) 1 (5.0) 12 (6.5) p.G542X 0 4 (5.3) 0 0 2 (8.3) 1 (5.0) 7 (3.8) p.S549R 1 (2.9) 3 (3.9) 0 0 0 0 4 (2.2) p.W1282X 0 1 (1.3) 0 0 1 (4.2) 0 2 (1.1) p.R1162X 0 0 2 (10.0) 0 0 0 2 (1.1) p.A559T 1 (2.9) 0 0 0 0 0 1 (0.5) p.Y1092X 0 0 1 (5.0) 0 0 0 1 (0.5) p.R334W 0 0 0 0 1 (4.2) 0 1 (0.5) c.1215delG 0 1 (1.3) 0 0 0 0 1 (0.5) c.2185_2186insC 0 0 0 0 0 1 (5.0) 1 (0.5) c.2789+5G>A 0 0 0 0 1 (4.2) 0 1 (0.5) c.3120+1G>A 0 0 1 (5.0) 0 0 0 1 (0.5) c.3849+1G>A 0 1 (1.3) 0 0 0 0 1 (0.5) p.R1066C 0 1 (1.3) 0 0 0 0 1 (0.5) p.N1303K 1 (2.9) 0 0 0 0 0 1 (0.5) c.3500-2A>G* 1 (2.9) 0 0 0 0 0 1 (0.5) c.1323_1324insA* 0 0 1 (5.0) 0 0 0 1 (0.5) p.H609R* 0 0 0 0 0 1 (5.0) 1 (0.5) Unidentified 14 (41.2) 26 (34.2) 8 (40.0) 4 (40.0) 8 (33.3) 7 (35) 67 (36.4) The regions of the country where few patients were studied are grouped as other. Login to comment 53 ABCC7 p.Asn1303Lys The patient, a compound heterozygote ([p.N1303K]+[c.3500-2A>G]) has elevated levels of sweat chloride (96mEq/l), and is pancreatic insufficient (PI). Login to comment 54 ABCC7 p.Tyr1092Ser The frameshift mutation (c.1323_1324insA) located in exon 8 of the CFTR gene is detected in Bolivar in a compound heterozygous patient ([p.Y1092S]+[c.1323_1324insA]). Login to comment 56 ABCC7 p.His609Arg The third mutation located in exon 13, p.H609R (A to G at position 1958), produces a His to Arg replacement in the R domain of the protein. Login to comment 57 ABCC7 p.His609Arg The compound [p.F508del]+[p.H609R] patient, although having elevated sweat chloride levels (114mEq/l), has a mild course of the disease, with pancreatic sufficiency (PS). Login to comment 63 ABCC7 p.Trp1282* ABCC7 p.Arg1162* Nevertheless, taken by regions, some of them account for a high proportion of the mutations, like p.R1162X (5% in Bolívar), p.W1282X (4.2% in Valle) or c.2185_2186insC (5% in the other Departments) (Table 1), and analysis of more patients should confirm their relative frequency in those particular regions. Login to comment 66 ABCC7 p.Trp1282* ABCC7 p.Asn1303Lys ABCC7 p.Gly542* ABCC7 p.Arg1162* As shown in Table 2, the five worldwide main mutations (p.F508del, p.G542X, p.R1162X, p.W1282X and p.N1303K) account for 48% to 66% of the mutations in IberoAmerican countries: Colombia (48.3%) (present study) and Mexico (49%) (Orozco et al. 2000) are very similar and have the lowest frequencies, whereas Brazil (61.7%) (CFGAC, 1999) and Argentina (66.2%) (Chertkoff et al., 1997) have the highest frequencies and are much closer to the values observed in Spanish CF patients (66.4%) (Estivill et al., 1997). Login to comment 69 ABCC7 p.Trp1282* ABCC7 p.Arg334Trp ABCC7 p.Asn1303Lys ABCC7 p.Gly542* ABCC7 p.Arg1162* ABCC7 p.Ser549Arg ABCC7 p.Arg1066Cys ABCC7 p.Tyr1092* ABCC7 p.Ala559Thr ABCC7 p.His609Arg Comparison of the Spectrum of CFTR Mutations in Colombia and Other Ibero-American Countries COLOMBIA1 SPAIN2 MEXICO3 ARGENTINA4 BRAZIL5 MUTATION n=92 n=1356 n=194 n=228 n=272 % % % % % p.F508del 41.8 54.42 40.72 57 45.6 p.G542X 3.8 7.7 6.18 3.94 6.6 p.W1282X 1.1 0.5 0 3.07 2.2 p.R1162X 1.1 1.3 0 0.43 4.4 p.N1303K 0.5 2.5 2.06 1.75 2.9 c.1811+1.6KbA>G 6.5 1.5 0 0.43 0 p.S549R 2.2 0.07 0 0 0 p.A559T 0.5 0 0 0 0 p.Y1092X 0.5 0.01 0.51 0 0 p.R334W 0.5 0.9 0 0 2.9 c.1215delG 0.5 0 0 0 0 c.2185_2186insC 0.5 0 0 0 0 c.2789+5G>A 0.5 0.7 0 0.43 0 c.3120+1G>A 0.5 0 0 0 0 c.3849+1G>A 0.5 0 0 0 0 p.R1066C 0.5 0.7 0 0.43 0 c.3500-2A>G (novel) 0.5 0 0 0 0 c.1323_1324insA (novel) 0.5 0 0 0 0 p.H609R (novel) 0.5 0 0 0 0 Other a (# mutations) - (32) 1.8 (30) 5.28 (9) 4.89 (8) 6.98 Unknown 36.4 17.9 25.25 27.63 28.3 a The frequencies of the other rare mutations found in Spain, Mexico, Argentina and Brazil are pooled together, and the number of different mutations is given in parenthesis. 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