Abstract
To investigate the hematological characteristics and genotype distribution of thalassemia among people at reproductive age in Chongqing. Hematology analysis and capillary electrophoresis were performed in 29 145 participants at reproductive age. The patients with positive results were confirmed by thalassemia genotyping. Genotype distribution and characteristics of mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH) and hba2 levels in thalassemia patients were analyzed. --SEA/αα (45.10%), -α3.7/αα (39.31%) and -α4.2/αα (8.46%) were the most common genotypes of α-thalassemia, while CD17 (HBB: c. 52A>T) (31.67%), CD41-42 (HBB: c. 126-129 del TTCT) (26.87%) and IVS-Ⅱ-654 (HBB: c. 316-197 C>T) (24.21%) were the most common genotypes of β-thalassemia in Chongqing. In α-thalassemia ααCS/αα showed the lowest hba2 value (2.18±0.23)%, while --SEA/αα showed the lowest MCV (71.9±8.5) fl and MCH (22.7±3.3) pg value. The patients in βE (HBB: c. 79G>A) group showed comparatively higher values of MCV and MCH and significantly lower HbA and hba2 values than the other genotypes. There was no significant difference in HbA, hba2, MCV, MCH levels of the patients between pregnant group and non-pregnant group. In Chongqing, there are differences in hematological characteristics among patients with different thalassemia genotypes. There is no significant effect of pregnancy on HbA, hba2, MCV and MCH has been found.
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