Browsing by Author "Reisli, Ismail"

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DiGeorge Syndrome
(2016) Gokturk, Bahar; Reisli, Ismail
DiGeorge syndrome, which is caused by abnormal development and migration of neural crest cells, is the most common microdeletion syndrome. The phenotype is variable due to the existence of more than 35 genes in the typical deletion region. However, the genotypephenotype correlation is very weak in this patient group. Every patient with facial dysmorphism, delay in developmental milestones and macrothrombocytopenia should be questioned for the other specific findings of DGS, and tested if needed. All findings do not have to be together to make the diagnosis. It should be known that patients experience different problems at different stages of their lives, and genetic counseling should be provided to the patients and their families. Our aim in this review was to provide detailed information and raise awareness about DGS as it is common but rarely diagnosed, and presents many difficulties during follow-up.
Familial 22q11.2 deletion syndrome with autosomal dominant inheritance
(2016) Gokturk, Bahar; Gokdemir, Mahmut; Reisli, Ismail; Yildirim, Mahmut Selman
22q11.2 deletion syndrome is the most frequent microdeletion syndrome in humans and caused by hemizygote deletion on only one chromosome. Most of probands have a de novo deletion of 22q11.2, but 8-20% have inherited the 22q11.2 deletion from a parent (autosomal dominant mutation). Genotype-phenotype correlation is weak in this patient group. We aimed to present three members in the same family due to an autosomal dominant inheritance with 22q11.2 deletion and different clinical findings.
Infectious Diseases, Autoimmunity and Midline Defect in A Patient with A Novel Bi-Allelic Mutation in IL12RB1 Gene
(2016) Goktrurk, Bahar; Reisli, Ismail; Caliskan, Umran; Oleaga-Quintas, Carmen; Deswarte, Caroline; Turul-Ozgur, Tuba; Burgucu, Durmus; Migaud, Melanie; Casanova, Jean-Laurent; Picard, Capucine; Bustamante, Jacinta; 28266204
Clinical disease caused by weakly pathogenic mycobacterial species, which is known as Mendelian susceptibility to mycobacterial disease (MSMD), is a rare entity. IFN-gamma and IL-17 production are defective due to insufficient response to IL-2 and IL-23 in IL-12R beta 1 deficiency; so this also causes tendency to intracellular microorganisms and candidal diseases. Here, we present a patient who suffers IL-12R beta 1 deficiency caused by a novel bi-allelic mutation with recurrent salmonellosis, mycobacterial, fungal infections and remained asymptomatic during 13 months of follow-up after hIFN-gamma treatment. In addition she had hemolytic anemia and midline defects like cleft lip and palate which have not been reported in a patient with MSMD in the literature prior to this case report. In conclusion, diagnosis of MSMD should be kept in mind in patients with recurrent salmonellosis, mycobacterial and fungal infections especially in countries with a high consanguinity rate.
Long-Term Follow-Up of a Case with Nijmegen Breakage Syndrome
(2018) Gokturk, Bahar; Genc Yuzuak, Serap; Hazar Sayar, Esra; Yildirim, Mahmut Selman; Reisli, Ismail
The Nijmegen Breakage Syndrome (NBS) is a rare chromosomal instability disorder clinically characterized by microcephaly, typical facial appearance, growth and mental retardation, immunodeficiency and a significant predisposition to lymphoid malignancy. The gene mutated in NBS, NBS1, has been mapped to the 8q21 chromosome. The product of this gene is a protein with a molecular weight of 95 kDa named nibrin. One of the common features of NBS is dysregulation of both cellular and humoral arms of the immune system, resulting in recurrent bacterial and viral infections, mainly of the respiratory tract. NBS is a rare syndrome. It should be considered that NBS may be associated with immunodeficiency
Would Mean Platelet Volume/Platelet Count Ratio Be Used as A Novel Formula to Predict 22q11.2 Deletion Syndrome?
(2016) Gokturk, Bahar; Guner, Sukru Nail; Kara, Reyhan; Kirac, Mine; Keles, Sevgi; Artac, Hasibe; Zamani, Ayse Gul; Yildirim, Mahmut Selman; Reisli, Ismail; 27007839
Background: The diagnosis of 22q11.2 deletion syndrome depends on a time-consuming and expensive method, fluorescence in situ hybridisation (FISH). Objectives: We aimed to determine new parameters which can aid for in the diagnosis of 22q11.2 deletion syndrome. Methods: Twenty two patients with 22q11.2 or 10p13 deletion were evaluated retrospectively. Results: Facial-dysmorphism and mental-motor retardation were detected in 100% of patients. Mean platelet (PLT) counts were lower (224,980 versus 354,000, p = 0.001), mean PLT volume (MPV) (9.95 versus 7.07, p = 0.002), and MPV/PLTx10(5) ratios (5.36 versus 2.08, p < 0.001) were higher in patients with 22q11.2 deletion compared with the control group. Area under the receiver-operator characteristic (ROC) curve was 0.864, sensitivity was 84.6%, specificity was 90.9%, positive predictive value (PPV) was 91.7%, and negative predictive value (NPV) was 83.3% when MPV was 8.6. Area under ROC curve was 0.864, sensitivity was 76.9%, specificity was 90.1%, PPV was 90.1%, and NPV was 76.3% when PLT was 265,500. Area under ROC curve was 0.906, sensitivity was 84.6%, specificity was 100%, PPV was 100%, and NPV was 84.6% when MPV/PLTx10(5) was 3.3. Expression of PLT surface markers which were not in the GPIb-V-IX receptor complex (CD61, CD41a) increased as the surface area increased, but markers which were in a complex (CD42a, CD42b) did not change. Conclusions: High MPV/PLT value can be a good predictor for the diagnosis of 22q11.2 deletion syndrome. We suggest that in patients with facial dysmorphism and retardation in neurodevelopmental milestones and if MPV >= 8.6fl, MPV/PLTx10(5) ratio >= 3.3 and PLT count <= 265,500/mm(3), the patients should be tested by FISH analysis to confirm the 22q11.2 deletion. If there are no macrothrombocytes, the 10p13 deletion should be tested in suspected cases.