Çocuk Sağlığı ve Hastalıkları Anabilim Dalı Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12514/4204

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Citation - WoS: 1
Clinical characteristics of patients presented with primary adrenal insufficiency due to a p.R451W mutation in the CYP11A1 gene
(Karger, 2023) Çayır, Atilla; Demirbilek, Hüseyin; Özbek, Mehmet Nuri; Kurt, İlknur; Karaoğlan, Murat; Albayrak, Serpil; Dündar, Bumin Nuri; Güran, Tülay; Kurt, Lknur
Background and objective: The first and rate-limiting step of steroidogenesis is the conversion of cholesterol to pregnanolone which is catalyzed by the P450scc side chain cleavage enzyme (encoded by CYP11A1 gene-SCC). Homozygous recessive mutations of the CYP11A1 gene cause a global steroid hormone deficiency thereby disorders of sexual development in 46, XY individuals with a variable phenotype depending on the mutation characteristics. About 60 cases of SCC deficiency due to CYP11A1 gene mutation have been reported so far. The most common mutation is the c.1351C>T (p.R451W) mutation, which has been detected in 12 cases. We, herein, present the clinical characteristics of 14 cases presented with adrenal insufficiency due to p.R451W mutation in the CYP 11A1 gene. Design and method: Data were retrospectively collected from tertiary pediatric endocrine centers using a standardized proforma. Family history, presenting age, clinical, biochemical, and hormonal characteristics, treatment options, and the follow-up characteristics obtained during their latest follow-up visits were recorded. Results: 14 patients (M/F:7/7) from 10 consanguineous Turkish families were recruited. The mean age of the diagnosis was 3.8±2.4(Range: 1.04-8.5 years). All of the male subjects were completely virilized with no sign of DSD. The main presenting complaints were signs and symptoms of primary adrenal insufficiency. However, despite having signs and symptoms 3 subjects were diagnosed when investigated due to the history of their affected siblings. While glucocorticoid deficiency (elevated ACTH, low cortisol) was present in all cases, none of the male cases had undervirilization excluding androgen deficiency. Mild mineralocorticoid (MC) deficiency was detected in 10/14 of the cases which were recovered in 2 subjects during follow-up. More strikingly, one patient with no MC deficiency at presentation had developed a salt-wasting adrenal crisis during acute illness. Although a deterioration was detected in height SDS, there was not a statistically significant difference between height SDS at presentation (-0.64±1.4), at the latest follow-up visit(-0.90±1.4), and target height SDS (-0.63±0.6). Conclusion: In the present largest case series with a p.R451W mutation in the CYP11A1 gene our results confirmed a milder phenotype for all steroid hormones. Particularly lack of virilization defect in male subjects, and lack of salt-wasting crisis until a relatively late age of diagnosis suggested mild MC and androgen deficiency. Nevertheless, lack of MC deficiency at presentation does not exclude the risk of developing a salt-wasting adrenal crisis. Therefore special caution requires for patients with no MC replacement, particularly during acute illnesses.
Citation - WoS: 4
Citation - Scopus: 4
Early puberty paradox: an investigation of anxiety levels of mothers and children, children's quality of life, and psychiatric diagnoses
(SpringerLink, 2023) Kardaş, Burcu; Kardaş, Ömer; Demiral, Meliha; Özbek, Mehmet Nuri
Early puberty signs lead to an increase in anxiety levels of parents and children. The aim of this study was to investigate the quality of life and anxiety levels of girls and their mothers who were admitted to a pediatric endocrinology clinic with concerns about early puberty. Girls and their mothers who were admitted to endocrinology outpatient clinic with concerns about early puberty were compared to healthy control group. Screen for Child Anxiety Related Emotional Disorders (SCARED) parent form, Quality of Life for Children Scale (PedsQL) parent form, and Beck Anxiety Inventory (BAI) were administered to the mothers. Children were evaluated with the Schedule for Afective Disorders and Schizophrenia for School-Age Children (Kiddie-SADS Lifetime Version) (K-SADS-PL). The study sample consisted of 92 girls and 62 of them were administered to clinic with concerns about early puberty. There were 30 girls in early puberty group (group 1), 32 girls were in the normal development group (group 2), and 30 were in the healthy control group (group 3). The anxiety level of group 1 and group 2 was signifcantly higher, and their quality of life was signifcantly lower when compared to group 3 (p<0.001). Mother’s anxiety level was found signifcantly higher in group 2 (p<0.001). It has shown that anxiety level and quality of life of children were associated with anxiety level of mothers and the current Tanner stage (r=0.302, p<0.005). Conclusion: Mothers and children who have concerns about early puberty are negatively afected when early puberty is a possibility. For this reason, educating parents will prevent negative impacts of this situation on children. At the same time, it will decrease health burden.
Citation - WoS: 1
Citation - Scopus: 2
Evaluation and management of neonatal onset hyperinsulinemic hypoglycemia: a single neonatal center experience
(Taylor & Francis, 2023) Bezirganoğlu, Handan; Okur, Nilifer; Feryal Taş, Funda; Çelik, Kıymet; Özbek, Mehmet Nuri; Tas, Funda Feryal
Objectives: To evaluate the clinical characteristics and treatment options of neonates requiring prolonged hospitalization due to persistent hyperinsulinemic hypoglycemia (HH). Methods: This retrospective cohort study included infants >34 weeks of gestation at birth who were born in our hospital between 2018 and 2021, diagnosed with HH, and required diazoxide within the first 28 days of life. The baseline clinical characteristics, age at the time of diagnosis and treatment options in diazoxide resistance cases were recorded. Genetic mutation analysis, if performed, was also included. Results: A total of 32 infants diagnosed with neonatal HH were followed up. Among the cohort, 25 infants were classified as having transient form of HH and seven infants were classified as having congenital hyperinsulinemic hypoglycemia (CHI). Thirty-one percent of the infants had no risk factors. The median birth weight was significantly higher in the CHI group, whereas no differences were found in other baseline characteristics. Patients diagnosed with CHI required higher glucose infusion rate, higher doses, and longer duration of diazoxide treatment than those in the transient HH group. Eight patients were resistant to diazoxide, and six of them required treatment with octreotide and finally sirolimus. Sirolimus prevented the need of pancreatectomy in five of six patients without causing major side effects. Homozygous mutations in the ABCC8 gene were found in four patients with CHI. Conclusions: The risk of persistent neonatal hyperinsulinism should be considered in hypoglycemic neonates particularly located in regions with high rates of consanguinity. Our study demonstrated sirolimus as an effective treatment option in avoiding pancreatectomy in severe cases.
MOLECULAR DIAGNOSIS IN PATIENTS WITH MONOGENIC DIABETES MELLITUS, AND DETECTION OF A NOVEL CANDIDATE GENE
(Elsevier, 2023) Gökşen, Damla; Evin, Ferda; Işık, Esra; Özen, Samim; Atık, Tahir; Özkınay, Ferda; Akcan, Neşe; Özkan, Behzat; Büyükinan, Muammer; Özbek, Mehmet Nuri; Darcan, Şükran; Onay, Hüseyin
Aim: We aimed to investigate molecular genetic basis of monogenic diabetes (DM) and novel responsible candidate genes with targeted Next Generation Sequencing (NGS) and Whole Exome Sequencing (WES). Methods: A hundred cases presenting with clinical findings and a family history of monogenic DM were included in the study. Molecular analysis was performed using an NGS panel including 14 genes. Following targeted NGS, WES was planned in cases in whom no variant was detected. Results: Thirty different disease-causing variants in seven different genes were detected in thirty-five (35%) cases with targeted NGS approach. Most common pathogenic variant was found in GCK gene in 25 (25%) cases. Four different variants were detected in 4 (4%) patients in ABCC8 gene. In 45 of 65 cases; WES analyses were done. A heterozygous c.2635C>T(p.Gln879Ter) variant was detected in IFIH1 gene in a patient with incidental hyperglycemia. In the segregation analysis affected mother was shown to be heterozygous for the same variant. Conclusion: Molecular etiology was determined in 35% cases with the NGS targeted panel. Seventeen novel variants in monogenic DM genes have been identified. A candidate gene determined by WES analysis in a case that could not be diagnosed with NGS panel in this study.

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