Browsing by Author "Aydinok Y."

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Successful desensitization of a case with desferrioxamine hypersensitivity
    (2006) Gülen F.; Demir E.; Tanaç R.; Aydinok Y.; Gulen H.; Yenigün A.; Can D.
    Thalassaemia major is a severe chronic hemolytic disease, resulted with iron overload mainly due to regular blood transfusions. Iron overload may lead to serious organ toxicity and even fatal complications, if no iron excretion is achieved by a chelating agent. First introduced in 1976 as s.c. treatment for thalassaemia major, desferrioxamine (DFO) has substantially improved the life expectancy in the disease. While DFO can cause local allergic reactions including redness, itching, pain and lumps, on rare occasion anaphylactic reactions can occur. The mechanism of anaphylaxis like reactions is not well understood. In this case report, we presented a 10 years-old girl with thalassaemia major who had to stop DFO therapy after appearing of systemic allergic reactions with hypotension, tachycardia, pruritus and urticaria against this drug. Serum IgE level was normal, specific IgE and skin prick tests were negative. Intradermal test was resulted with positive reaction to DFO. The patient was hospitalized and desensitization protocol was initiated with rapid s.c. infusions per 15 min. The protocol was stopped at the 17th cycle because of local reaction reappeared. After that, DFO was further diluted and was restarted with lower dosage and longer infusion period. Then, DFO dosage was increased and the dilutions and infusion times were decreased gradually. By this desensitization programme, the patient would continue to use DFO chelation safely for 10 months.
  • No Thumbnail Available
    Item
    Is Monitoring of Cytomegalovirus Disease Required in Nontransplant Pediatric Acute Lymphoblastic Leukemia?
    (Lippincott Williams and Wilkins, 2021) Şen S.; Özdemir H.H.; Karadaş N.; Bal Z.Ş.; Göktepe Ş.Ö.; Ece D.; Balkan C.; Aydinok Y.; Karapinar D.Y.
    Introduction: Cytomegalovirus (CMV) infections in developing countries are experienced at an early age. This study was performed to investigate the frequency of reactivation and risk factors of infection acquired at an early age of nontransplant acute lymphoblastic leukemia (ALL) patients receiving immunosuppressive therapy with weekly monitoring of CMV levels in Turkey. Materials and Methods: This was a retrospective, single-center study of 172 pediatric patients (102 boys and 70 girls) with ALL. All patients were monitored routinely for CMV-DNA at the initial presentation of leukemia and twice a week during chemotherapy. The CMV immunoglobulin (Ig)M/IgG titers were measured at admission. Results: CMV seropositivity at baseline was 90,11%. The overall prevalence of CMV infection (viremia) was 70.34%, 116 of whom were seropositive for CMV IgG and 5 of whom were negative for CMV at the time of ALL diagnosis. Reactivation was more common than de novo CMV infections (P=0.000). CMV seropositivity at the beginning of the leukemia diagnosis was found to be an independent predictor for developing CMV infection (P=0.001). A total of 60 CMV infection episodes were treated with antivirals. Four of these included organ involvement. The duration of CMV-DNA viremia episodes was longer in patients with CMV-DNA ≥1000 copies/mL (n=45) than in those with lower CMV-DNA levels (P=0.002). Infection was shown not to be associated with chemotherapy phase. Conclusion: This study suggests the importance of monitoring for CMV infections in developing countries because of frequent reactivations in seropositive ALL patients. It should be kept in mind that low CMV-DNA levels may also lead to organ involvement. © 2021 Lippincott Williams and Wilkins. All rights reserved.
  • No Thumbnail Available
    Item
    Identification of the molecular etiology in rare congenital hemolytic anemias using next-generation sequencing with exome-based copy number variant analysis
    (John Wiley and Sons Inc, 2024) Isik E.; Aydinok Y.; Albayrak C.; Durmus B.; Karakas Z.; Orhan M.F.; Sarper N.; Aydın S.; Unal S.; Oymak Y.; Karadas N.; Turedi A.; Albayrak D.; Tayfun F.; Tugcu D.; Karaman S.; Tobu M.; Unal E.; Ozcan A.; Unal S.; Aksu T.; Unuvar A.; Bilici M.; Azik F.; Ay Y.; Gelen S.A.; Zengin E.; Albudak E.; Eker I.; Karakaya T.; Cogulu O.; Ozkinay F.; Atik T.
    Objectives: In congenital hemolytic anemias (CHA), it is not always possible to determine the specific diagnosis by evaluating clinical findings and conventional laboratory tests. The aim of this study is to evaluate the utility of next-generation sequencing (NGS) and clinical-exome-based copy number variant (CNV) analysis in patients with CHA. Methods: One hundred and forty-three CHA cases from 115 unrelated families referred for molecular analysis were enrolled in the study. Molecular analysis was performed using two different clinical exome panels in 130 patients, and whole-exome sequencing in nine patients. Exome-based CNV calling was incorporated into the traditional single-nucleotide variant and small insertion/deletion analysis pipeline for NGS data in 92 cases. In four patients from the same family, the PK Gypsy variant was investigated using long-range polymerase chain reaction. Results: Molecular diagnosis was established in 86% of the study group. The most frequently mutated genes were SPTB (31.7%) and PKLR (28.5%). CNV analysis of 92 cases revealed that three patients had different sizes of large deletions in the SPTB and six patients had a deletion in the PKLR. Conclusions: In this study, NGS provided a high molecular diagnostic rate in cases with rare CHA. Analysis of the CNVs contributed to the diagnostic success. © 2024 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.