Delta-thalassemia in Cyprus. Pavlou, E., Phylactides, M., Kyrri, A., Kalogerou, E., Makariou, C., Georgiou, I., & Kleanthous, M. Hemoglobin, 30(4):455–462, 2006. Place: England
doi  abstract   bibtex   
To help clarify the hematological picture of patients who may be positive for beta- and delta-globin gene mutations, the following study was carried out. Our aim was to identify the delta-globin gene mutations found in the Greek Cypriot population, their frequencies and the Hb A2 values associated with them. Seventy-four samples were selected from a random sample of 5,030 individuals, and the database of the Molecular Genetics Thalassaemia Department containing diagnostic analyses data was also mined for relevant information. Four novel for Cyprus delta-globin gene mutations: -30 (T–\textgreaterC), Hb A2-Wrens [delta98(FG5)Val–\textgreaterMet, GTG–\textgreaterATG], IVS-I-2 (T–\textgreaterC) and Hb A2-Yokoshima [delta25(B7)Gly–\textgreaterAsp (GGT–\textgreaterGAT)] were identified. Hb A2-Yialousa [delta27(B9)Ala–\textgreaterSer, GCC–\textgreaterTCC], Hb A2-Yokoshima, Hb A2-Troodos [delta116(G18)Arg–\textgreaterCys, CGC–\textgreaterTGC], Hb A2-Pelendri [delta141(H19)Leu–\textgreaterPro, CTG–\textgreaterCCG], codon 4 [delta4(A1)Thr–\textgreaterIle], codon 59 (-A), Hb A2-Wrens, IVS-II-897 (A–\textgreaterG), IVS-I-2, -55 (T–\textgreaterC) and -30 bring the total to 11 delta-globin alleles found in the Greek Cypriot population. Hb A2-Yialousa is the most common mutation followed by codon 4, with frequencies of 60.7 and 17.8%, respectively.Hb A2 levels above 1.9% have been found to indicate a significantly reduced possibility for the presence of a delta-globin gene mutation in this population. For Hb A2 levels of 1.7 and 1.8% the possibility of a delta-globin gene mutation rises to 90.9% and reaches 100% for lower Hb A2 levels. The frequency of all the mutant delta-globin chromosomes in the sample is 0.0067 and the carrier frequency is 1.26%.
@article{pavlou_delta-thalassemia_2006,
	title = {Delta-thalassemia in {Cyprus}.},
	volume = {30},
	issn = {0363-0269},
	doi = {10.1080/03630260600868006},
	abstract = {To help clarify the hematological picture of patients who may be positive for beta- and delta-globin gene mutations, the following study was carried out. Our  aim was to identify the delta-globin gene mutations found in the Greek Cypriot  population, their frequencies and the Hb A2 values associated with them.  Seventy-four samples were selected from a random sample of 5,030 individuals, and  the database of the Molecular Genetics Thalassaemia Department containing  diagnostic analyses data was also mined for relevant information. Four novel for  Cyprus delta-globin gene mutations: -30 (T--{\textgreater}C), Hb A2-Wrens  [delta98(FG5)Val--{\textgreater}Met, GTG--{\textgreater}ATG], IVS-I-2 (T--{\textgreater}C) and Hb A2-Yokoshima  [delta25(B7)Gly--{\textgreater}Asp (GGT--{\textgreater}GAT)] were identified. Hb A2-Yialousa  [delta27(B9)Ala--{\textgreater}Ser, GCC--{\textgreater}TCC], Hb A2-Yokoshima, Hb A2-Troodos  [delta116(G18)Arg--{\textgreater}Cys, CGC--{\textgreater}TGC], Hb A2-Pelendri [delta141(H19)Leu--{\textgreater}Pro,  CTG--{\textgreater}CCG], codon 4 [delta4(A1)Thr--{\textgreater}Ile], codon 59 (-A), Hb A2-Wrens, IVS-II-897  (A--{\textgreater}G), IVS-I-2, -55 (T--{\textgreater}C) and -30 bring the total to 11 delta-globin alleles  found in the Greek Cypriot population. Hb A2-Yialousa is the most common mutation  followed by codon 4, with frequencies of 60.7 and 17.8\%, respectively.Hb A2  levels above 1.9\% have been found to indicate a significantly reduced possibility  for the presence of a delta-globin gene mutation in this population. For Hb A2  levels of 1.7 and 1.8\% the possibility of a delta-globin gene mutation rises to  90.9\% and reaches 100\% for lower Hb A2 levels. The frequency of all the mutant  delta-globin chromosomes in the sample is 0.0067 and the carrier frequency is  1.26\%.},
	language = {eng},
	number = {4},
	journal = {Hemoglobin},
	author = {Pavlou, Eleni and Phylactides, Marios and Kyrri, Andriani and Kalogerou, Eleni and Makariou, Christiana and Georgiou, Ioannis and Kleanthous, Marina},
	year = {2006},
	pmid = {16987800},
	note = {Place: England},
	keywords = {Chi-Square Distribution, Codon/genetics, Cyprus/epidemiology, DNA Mutational Analysis, Female, Genetic Carrier Screening, Genetic Testing, Genotype, Globins/*genetics, Hemoglobin A2/*analysis, Heterozygote, Humans, Male, Point Mutation/*genetics, Sequence Analysis, DNA, alpha-Thalassemia/epidemiology/*genetics, beta-Thalassemia/epidemiology/*genetics},
	pages = {455--462},
}

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