A danazolkezelés hatása C1-inhibitor-hiány okozta hereditaer angiooedemás gyermekek növekedésére

Absztrakt: Bevezetés: Az attenuált androgéneket gyakran alkalmazzák C1-inhibitor-hiányos hereditaer angiooedema akut epizódjainak megelőzésére. Praepubertason túli alkalmazásuk az epifízisfugák korai záródásához, ezáltal növekedés-visszamaradáshoz vezethet. Célkitűzés: A danazol hereditaer angiooedemás gyermekek hossznövekedésére kifejtett hatásának felmérése. Módszer: Retrospektív tanulmányunk negyvenkettő, 21 évesnél idősebb hereditaer angiooedemás beteg adatait elemezte. A betegek esetében meghatároztuk a várható testmagasságtól való eltérést, majd azt a betegek neme, valamint a 21 éves kor előtt végzett danazolkezelés összdózisa és időtartama függvényében elemeztük. Danazollal 16 éves kora előtt kezelt betegek esetében összefüggést kerestünk a várható testmagasságtól való eltérés, valamint a kezelés időtartama, illetve kumulatív dózisa között. Eredmények: Nem találtunk szignifikáns különbséget a várható testmagasságtól való eltérésben danazolt szedő/nem szedő, illetve fiú és leány betegek között. Ezt a különbséget a danazol dózisa és alkalmazásának időtartama 16 vagy 21 évesnél fiatalabb korban végzett kezelés esetén sem befolyásolta. Következtetések: A danazol a minimális hatékony dózisban alkalmazva nem befolyásolta a növekedést. Orv Hetil. 2017; 158(32): 1269–1276. | Abstract: Introduction: Attenuated androgens are used for the prevention of angioedema attacks of hereditary angioedema with C1-inhibitor deficiency. After prepuberty, their use can lead to growth retardation. Aim: We assessed the effect of danazol on the growth of pediatric patients with hereditary angioedema. Method: In the retrospective study on 42 patients diagnosed with hereditary angioedema, we calculated the deviation from the mid-parental target height, and analyzed it against the gender, the dose and duration of danazol treatment administered before the age of 21 years and before the age of 16 years. Results: Regarding the deviation from the mid-parental target height, we did not find any significant difference between patients taking vs. not taking danazol, males vs. females taking danazol. The dose and the duration of danazol treatment did not influence that value neither before 21, nor before 16 years of age. Conclusions: Our findings suggest that treatment with the lowest effective doses of danazol does not influence growth. Orv Hetil. 2017; 158(32): 1269–1276

Methylation Status of CYP27B1 and IGF2 Correlate to BMI SDS in Children with Obesity

OBJECTIVE: Worldwide increasing childhood obesity is due to interactions between environmental and genetic factors, linked together by epigenetic mechanisms such as DNA methylation. METHODS: 82 obese children (>95th BMI percentile , age: 3-18 years) were included. Anthropometric data, metabolic parameters, 25-OH vitamin D (25OHD), and pubertal status were recorded, 24-hour blood pressure monitoring was performed. BMI standard deviation score (SDS) was calculated. Using candidate gene approach, obesity- (insulin-like growth factor 2 (IGF2), proopiomelanocortin (POMC)) and vitamin D metabolism-related genes (1-alfa-hydroxylase (CYP27B1), VDR) regulated by DNA methylation were selected. After isolating DNA from peripheral blood, bisulfite conversion, bisulfite specific polymerase chain reaction (BS-PCR), and pyrosequencing were carried out. RESULTS: No significant correlation between 25-OHD and metabolic parameters and DNA methylation status, but a tendency of positive correlation between VDR methylation status and 25-OHD (r = 0.2053,p = 0.066) were observed. Significant positive correlations between BMI SDS and CYP27B1 hypermethylation (r = 0.2371,p = 0.0342) and a significant negative correlation between IGF2 hypomethylation and BMI SDS (r = -0.305,p = 0.0059) were found. Conclusions Rate of obesity shows correlation with DNA methylation. Hypomethylation of IGF2 and hypermethylation of CYP27B1 genes might positively influence the rate of BMI observed in obese children

Laktátszintváltozások diabeteses ketoacidosisban és frissen diagnosztizált 1-es típusú diabetes mellitusban

Absztrakt: Bevezetés: A klinikumban ismert a diabeteses ketoacidosisban (DKA) kialakuló hyperlactataemia, azonban a háttérben álló mechanizmusok és a változások kinetikája tisztázatlan. Az emberi szervezetben fiziológiásan főleg a laktát L-izomere van jelen. Hyperglykaemiás állapotokban azonban fokozott lehet a D- és L-laktát-termelés is, így a szöveti hypoperfusio mellett ez a tényező is szerepet játszhat a laktátváltozásokban. Célkitűzés: Vizsgálatunk célja a ketoacidosisban és a frissen diagnosztizált diabetesben jelentkező laktátváltozások kinetikájának és mechanizmusának feltérképezése volt. Módszer: Ketoacidosis (DKA-csoport, n = 13) és frissen diagnosztizált 1-es típusú diabetes mellitus (T1DM-csoport, n = 6) miatt felvett 5–18 éves gyermekek prospektív vizsgálata történt. A felvételt követően 0–12–24–48 órával vérgázvizsgálatot végeztünk, mely az L-laktát-koncentráció meghatározására is alkalmas. Minden időpontban meghatároztuk az összlaktátot (L + D) is gázkromatográfiás tömegspektrometriával. Eredmények: Felvételkor minden ketoacidoticus betegnél kórosan magas L-laktát-koncentrációt mértünk, ami magasabb volt, mint a T1DM-csoportban (p<0,05). 12 óra elteltével az L-laktát-szint ketoacidosisban csökkent, majd ismét megemelkedett 24 és 48 óra után (p<0,01). A T1DM-csoportban csak a 48 órás érték emelkedett szignifikánsan (p<0,05 versus 12 óra). 0–12 óra között az összlaktát-koncentráció jelentősen meghaladta az L-laktát-szintet, ez a D-laktátot tükröző különbség fokozatosan csökkenve 48 óra után megszűnt. Következtetés: A ketoacidosisban észlelt két laktátcsúcs közül az első 12 órában a hyperlactataemia kialakulásában az anaerob glikolízisnek van szerepe. A második, inzulinkezelés és rendezett folyadékháztartás mellett kialakuló csúcs hátterében fokozott aerob glikolízis állhat. Az L-laktát- és összlaktátszintek közötti kezdeti különbség D-laktát képződésére utal, amely a ketoacidosis kezdeti fázisában az L-laktáttal azonos nagyságrendben termelődik. Orv Hetil. 2019; 160(45): 1784–1790. | Abstract: Introduction: It is known that lactate concentration is increased in diabetic ketoacidosis (DKA), however, the pathophysiology and kinetics of lactate changes are still unclear. Normally, L-lactate is the major form in the human body. According to previous data, also D- and L-lactate might be increased in hyperglycaemic disorders. Aim: We aimed to describe the kinetics and mechanisms of lactate concentration changes in ketoacidosis and newly diagnosed diabetes. Method: We performed a prospective study, including 5–18-year-old children with ketoacidosis (DKA, n = 13) and with newly diagnosed type 1 diabetes without ketoacidosis (T1DM, n = 6). We performed routine blood gas analysis 0–12–24–48 hours after admission, which also measured L-lactate levels. We also determined total venous serum lactate level by gas chromatography–mass spectrometry. Results: Initial plasma lactate concentration was increased in ketoacidosis as compared to the newly diagnosed diabetes group (p<0.05). After 12 h of rehydration, lactate levels were greatly reduced in ketoacidotic patients but after 24–48 h it was repeatedly increased (all p<0.01). In the 0–12 h phase, total serum lactate level was higher than L-lactate level, referring to D-lactate production. Conclusion: We described two L-lactate peaks in ketoacidosis. In the first 12 hours anaerobic glycolysis seems to have major role in hyperlactataemia. We assume that stimulated aerobic glycolysis leads to the second lactate peak. However, D-lactate is not routinely measured, it may contribute to the initial hyperlactataemia in both groups and is comparable to L-lactate production in ketoacidosis. Orv Hetil. 2019; 160(45): 1784–1790

A SHOX géndeletio előfordulása idiopathiás alacsonynövésben

INTRODUCTION: The isolated haploinsufficiency of the SHOX gene is one of the most common cause of short stature determined by monogenic mutations. The heterozygous deviation of the gene can be detected in 2-15% of patients with idiopathic short stature (ISS), in 50-90% of patients with Leri-Weill dyschondrosteosis syndrome (LWS), and in almost 100% of patients with Turner syndrome. AIM: The aim of our study was to evaluate the frequency of SHOX gene haploinsufficiency in children with ISS, LWS and in patients having Turner syndrome phenotype (TF), but normal karyotype, and to identify the dysmorphic signs characteristic for SHOX gene deficiency. METHOD: A total of 144 patients were included in the study. Multiplex Ligation-dependent Probe Amplification (MLPA) method was used to identify the SHOX gene haploinsufficiency. The relationships between clinical data (axiological parameters, skeletal disorders, dysmorphic signs) and genotype were analyzed by statistical methods. RESULTS: 11 (7.6%) of the 144 patients showed SHOX gene deficiency with female dominance (8/11, 81% female). The SHOX positive patients had a significantly higher BMI (in 5/11 vs. 20/133 cases, p<0.02) and presented more frequent dysmorphic signs (9/11vs 62/133, p = 0.02). Madelung deformity of the upper limbs was also significantly more frequent among the SHOX positive patients (4/11, i.e. 36%, vs. 14/133, i.e. 10%, p = 0.0066). There were no statistically significant differences between the mean age, mean height and auxological measurements (sitting height/height, arm span/height) between the two groups of patients. CONCLUSIONS: The occurrence of SHOX gene haploinsufficiency observed in our population corresponds to the literature data. In SHOX positive patients, in addition to short stature, the dysmorphic signs have a positive predictive value for SHOX gene alterations. However, the SHOX deletion detected in a patient with idiopathic short stature without dysmorphic signs suggest that SHOX deletion analysis can be recommended in patients with ISS. Orv Hetil. 2017; 158(34): 1351-1356

Elsődleges genetikai vizsgálat Prader–Willi-szindróma igazolására

INTRODUCTION: According to the international literature, DNA methylation analysis of the promoter region of SNRPN locus is the most efficient way to start genetic investigation in patients with suspected Prader-Willi syndrome. AIM: Our aim was to develop a simple, reliable first-tier diagnosis to confirm Prader-Willi syndrome, therefore to compare our self-designed simple, cost-efficient high-resolution melting analysis and the most commonly used methylation-specific multiplex ligation-dependent probe amplification to confirm Prader-Willi syndrome. METHOD: We studied 17 clinically suspected Prader-Willi syndrome children and their DNA samples. With self-designed primers, bisulfite-sensitive polymerase chain reaction, high-resolution melting analysis and, as a control, methylation-specific multiplex ligation-dependent probe amplification were performed. RESULTS: Prader-Willi syndrome was genetically confirmed in 6 out of 17 clinically suspected Prader-Willi syndrome patients. The results of high-resolution melting analysis and methylation-specific multiplex ligation-dependent probe amplification were equivalent in each case. CONCLUSION: Using our self-designed primers and altered bisulfite-specific PCR conditions, high-resolution melting analysis appears to be a simple, fast, reliable and effective method for primarily proving or excluding clinically suspected Prade-Willi syndrome cases. Orv Hetil. 2018; 159(2): 64-69

Szteroid-21-hidroxiláz-deficientia, a congenitalis adrenalis hyperplasia leggyakoribb oka

Abstract: Congenital adrenal hyperplasia is a group of genetic diseases due to the disablement of 7 genes; one of them is steroid 21-hydroxylase deficiency. The genes of congenital adrenal hyperplasia encode enzymes taking part in the steroidogenesis of adrenal gland. Steroid 21-hydroxylase deficiency is an autosomal recessive disorder caused by mutations of the steroid 21-hydroxylase gene. The mutations of steroid 21-hydroxylase gene cause 95% of the congenital adrenal hyperplasia cases. Although the non-classic steroid 21-hydroxylase deficiency with mild symptoms is seldom diagnosed, the classic steroid 21-hydroxylase deficiency may lead to life-threatening salt-wasting and adrenal crises due to the insufficient aldosterone and cortisol serum levels. The classic type requires life-long steroid replacement which may result in cushingoid side effects, and typical comorbidities may be also developed. The patients? quality of life is decreased, and their mortality is much higher than that of the population without steroid 21-hydroxylase deficiency. The diagnosis, consequences and the patients? life-long clinical care require a multidisciplinary approach: the specialists in pediatrics, internal medicine, endocrinology, laboratory medicine, genetic diagnostics, surgery, obstetrics-gynecology and psychology need to work together. Orv Hetil. 2018; 159(7): 269?277

Preliminary Evidence for Cell Membrane Amelioration in Children with Cystic Fibrosis by 5-MTHF and Vitamin B12 Supplementation: A Single Arm Trial

Cystic fibrosis (CF) is one of the most common fatal autosomal recessive disorders in the Caucasian population caused by mutations of gene for the cystic fibrosis transmembrane conductance regulator (CFTR). New experimental therapeutic strategies for CF propose a diet supplementation to affect the plasma membrane fluidity and to modulate amplified inflammatory response. The objective of this study was to evaluate the efficacy of 5-methyltetrahydrofolate (5-MTHF) and vitamin B12 supplementation for ameliorating cell plasma membrane features in pediatric patients with cystic fibrosis.A single arm trial was conducted from April 2004 to March 2006 in an Italian CF care centre. 31 children with CF aged from 3 to 8 years old were enrolled. Exclusion criteria were diabetes, chronic infections of the airways and regular antibiotics intake. Children with CF were supplemented for 24 weeks with 5-methyltetrahydrofolate (5-MTHF, 7.5 mg /day) and vitamin B12 (0.5 mg/day). Red blood cells (RBCs) were used to investigate plasma membrane, since RBCs share lipid, protein composition and organization with other cell types. We evaluated RBCs membrane lipid composition, membrane protein oxidative damage, cation content, cation transport pathways, plasma and RBCs folate levels and plasma homocysteine levels at baseline and after 24 weeks of 5-MTHF and vitamin B12 supplementation. In CF children, 5-MTHF and vitamin B12 supplementation (i) increased plasma and RBC folate levels; (ii) decreased plasma homocysteine levels; (iii) modified RBC membrane phospholipid fatty acid composition; (iv) increased RBC K(+) content; (v) reduced RBC membrane oxidative damage and HSP70 membrane association.5-MTHF and vitamin B12 supplementation might ameliorate RBC membrane features of children with CF.ClinicalTrials.gov NCT00730509