Discussion on the reference range of thromboelastogram in 916 healthy adults in Shenzhen area / 中国输血杂志

【Objective】 To determine the reference range of thromboelastogram(TEG) and establish a TEG feature for local population by measuring TEG parameters in healthy adults in Shenzhen comparing the difference between gender and age, and analyzing the reference data provided by reagent manufacturer. 【Methods】 A total of 916 healthy adults, aged between 19 to 59, who did their regular health checks in our hospital from September 2020 to August 2021 were selected. The TEG(from Lepu Medical Technology Co., Ltd.) was performed, and the clot reaction time(R), clot formation time(K), coagulation angle(α-Angle), maximum amplitude(MA), coagulation index(CI), fibrinolysis index LY30 and the estimated percent lysis (EPL) were analyzed. 【Results】 The reference ranges of TEG parameters, including R, K, α-Angle, MA, CI, LY30 and EPL, of 916 healthy adults from Shenzhen were 3.25~8.19 min, 0.66~3.18min, 47.70~76.56deg, 50.05~72.91mm, -4.3~3.4, 0~2.2% and 0~3%, respectively. The value of α-Angle, CI, K, LY30, MA and R didn’t all meet the given range provided by the manufacturer; some were exceeding and some inferior to. A total of 227 out of 916 individuals presented abnormal results, relative to the references, in at least one parameter, and 78 were diagnosed of abnormal coagulation based on the given reference range, with a specificity of 75.2%. 【Conclusion】 The reference range of TEG parameters of Shenzhen locals is significantly different from that provided by manufacturers. And it is imperative for local TEG laboratories to establish their own reference ranges according to age and gender groups based on local population characteristics.

Identification of a novel KIR3DL3*064 allele by cDNA cloning and sequencing / 中华医学遗传学杂志

OBJECTIVE@#To report on a novel KIR3DL3 allele identified in a southern Han Chinese individual.@*METHODS@#Peripheral blood sample was collected from a voluntary blood donor with inconclusive result by KIR3DL3 sequence-based typing (SBT). Total mRNA was extracted and subjected to reverse transcription to obtain KIR3DL3 cDNA, which was then amplified by PCR with a pair of KIR3DL3-specific primers. The product was subjected to cDNA cloning and sequencing.@*RESULTS@#cDNA cloning and sequencing have identified a wide-type KIR3DL3*00802 allele and a novel KIR3DL3*064 allele. The latter differed from KIR3DL3*00601 by a missense variant at codon 374[c.1184 C>T (p.Thr374Ile)] in exon 9. The novel KIR3DL3 allele has been officially assigned by the KIR subcommittee of World Health Organization Nomenclature Committee for factors of HLA system.@*CONCLUSION@#cDNA cloning and sequencing may be used to distinguish inconclusive results in KIR3DL3 SBT in order to identify novel KIR alleles.

The novel KIR2DL4*038 allele identified by sequencing-based typing in a Chinese Naxi individual.

The novel KIR2DL4*038 allele differs from the closest allele KIR2DL4*00102 by a single missense mutation.

Characterization of the novel KIR3DL3*062 allele identified in a Southern Chinese Han individual.

The novel KIR3DL3*062 allele differs from the closest allele KIR3DL3*02602 by a single missense mutation.