Lösemili pediyatrik hastalarda hematopoetik kök hücre transplantasyonu sonrası graft versus host hastalığı ve sağkalımda insan lökosit antijenlerinin etkisi

Objective: Hematopoietic stem cell transplantation (HSCT) is an important therapy for hematological diseases. One of the most significant complications of HSCT is graft versus host disease (GVHD), and major histocompatibility complex (MHC) is well known to affect GVHD and graft rejection. This study aimed to examine the effect of human leukocyte antigens (HLA) on the incidence of GVHD development in patients with leukemia. Methods: The association between HLA and GVHD formation was evaluated in 57 patients with HSCT with HLA-identical sibling donors, of whom 37 were boys and 20 were girls with a mean age of 10.11 years. All patients were diagnosed with leukemia; acute myeloid leukemia (n=33), acute lymphoblastic leukemia (n=15), and chronic myeloid leukemia (n=9). Transplantation pairs were worked for HLA-A, -B, -C, and -DRB1 alleles. Class I HLA antigens were investigated using Terasaki microlymphocytotoxicity, whereas class II HLA alleles with polymerase chain reaction - sequence-specific amplification method. Results: The frequency of developing GVHD in patients with HSCT was found to be 17.5% (n=10). HLA-DRB1∗04 allelic frequency [p=0.024, odds ratio (OR): 4.87] was found to be higher in patients who developed GVHD. However, the HLA-DRB1∗11 allelic frequency (p=0.031, OR: 0.12) was lower in patients who developed GVHD compared to patients who did not develop GVHD. Furthermore, HLA-B38 (p=0.002) and HLA-B41 (p=0.002) antigens were found only in patients who developed GVHD. The frequencies of the HLA-A26 allele (p=0.12) and the HLADRB1∗11 allele (p=0.037, OR: 4.0) were higher in patients with relapse after HSCT; however, the frequencies of the HLA-A2 allele (p=0.033, OR: 0.19) was lower in patients who relapsed after HSCT. Conclusion: This study assessed the relationship of HLA class with GVHD, relapse, and survival in children after HSCT in pediatric patients with leukemia.Amaç: Hematopoetik kök hücre nakli (HKHN), hematolojik hastalıklar için önemli bir tedavidir. HKHN’nin en önemli komplikasyonlarından biri, graft-versus-host hastalığıdır (GVHH) ve büyük doku uyumluluk kompleksinin (major histocompatibility complex-MHC) GVHH ve greft reddini etkilediği iyi bilinmektedir. İnsan lökosit antijenleri (human leukocyte antigen - HLA) tipinin lösemili hastalarda GVHH insidansı üzerindeki etkisini incelemeyi amaçladık. Gereç ve Yöntem: HLA uyumlu kardeş donörleri ile HKHN olan 57 hastada HLA ve akut, kronik GVHH oluşumu arasındaki ilişki değerlendirildi. Çalışmaya yaş ortalaması 10,11 olan 37 erkek ve 20 kız dahil edildi. Tüm hastaların tanıları; Akut myeloid lösemi (n=33), akut lenfoblastik lösemi (n=15), kronik myeloid lösemi (n=9) idi. Tüm nakil kardeş çiftleri HLA-A, -B, -C, -DRB1 allelleri için tiplendirildi. Sınıf I HLA antijenleri Terasaki mikrolenfositotoksisite kullanılarak saptandı ve sınıf II HLA allelleri polimeraz zincir reaksiyonu-diziye özgü primerler (polymerase chain reaction with specific primer sequence) yöntemi ile analiz edildi. Bulgular: HKHN uygulanan hastalar arasında GVHH insidansı %17,5 (n=10) olarak bulundu. HLA-DRB1*04 allelik frekansı [p=0,024, risk oranı (OR): 4,87] GVHH gelişen hastalarda daha yüksekti. Bununla birlikte, HLA-DRB1*11 allelik frekansı (p=0,031, OR: 0,12), GVHH gelişen hastalarda, GVHH geliştirmeyen hastalara göre daha düşüktü. Ayrıca, HLA-B38 (p=0,002) ve HLA-B41 (p=0,002) antijenleri sadece GVHH gelişen hastalarda bulundu. HLA-A26 alelinin (p=0,12) ve HLA-DRB1*11 alelinin (p=0,037, OR: 4,0) frekansları daha yüksekken, HLA-A2 allelinin frekansları (p=0,033, OR: 0,19) HKHN sonrası nükseden hastalarda daha düşük olarak saptandı. Sonuç: Bu çalışma, lösemili pediatrik hastalarda HKHN sonrası çocuklarda HLA sınıfının GVHH, relaps ve sağkalım ile ilişkisini değerlendiren çalışmadır

Transversus abdominis plane block with different bupivacaine concentrations in children undergoing unilateral inguinal hernia repair: A single-blind randomized clinical trial

BACKGROUND: Current knowledge on the ideal local anesthetic concentration for the ultrasound-guided transversus abdominis plane block (TAPB) in pediatrics is scarce. The purpose of this study is to compare the efficacy of US-guided TAPB at two different concentrations of bupivacaine in pediatrics undergoing unilateral inguinal hernia repair. METHODS: After random allocation, 74 children aged 1-8 were randomized to receive US-guided TAPB by using 1 mg.kg RESULTS: Sixty-four children were recruited for the study. Postoperative pain scores were equal between the two groups. There was no need for a rescue analgesic in any group after the postoperative 6 CONCLUSION: TAPB using 1 mg.kg TRIAL REGISTRATION: This trial was retrospectively registered at Clinicaltrals.gov , NCT04202367

Cytokine gene polymorphism frequencies in Turkish population living in Marmara region

Objectives Sequence variants in cytokine genes are related to affect cytokine gene levels. In this study, it was aimed to examine eight single nucleotide polymorphisms (SNPs) in five cytokine genes (TNF-alpha, INF-gamma, IL-6, IL10, TGF-beta) for the Turkish population living in Marmara region and to reveal the genetic distance between the study group and other populations. Methods In this study, three-hundred unrelated healthy individuals were involved and all genotyping were performed by using sequence-specific primers PCR (PCR-SSP) method. The SNP data were analyzed for Hardy Weinberg equilibrium fit by calculating expected genotype frequencies and comparing them to the observed values using Arlequin software version 3.1. The genetic distances between the study group and other populations were calculated and a neighbor-joining tree was constructed by PHYLIP. Results The observed genotypes of TNF-alpha (-308), IFN-gamma (+874), TGF-beta (codon 10), and TGF-beta (codon 25) of the subjects were found to be similar with other populations investigated in this study. However, there is a significant frequency difference for IL-6 and IL-10 genotypes between populations. Conclusions The current population study provided more reference values for these polymorphisms and generated a control group to be used in further association studies especially for transplantation, GVHD, autoimmune and malign disease