Evaluation of clinical follow-up and treatment outcomes in patients with Glycogen Storage Disease Type Ia in relation to glycemic balance
Project no. 32777 · Status: Kapanmış (Yayın bekleniyor) · 2024
Summary
<p><strong>Objective: </strong>Glycogen Storage Disease Type 1a (GSD 1a) is a metabolic disorder </p><p>characterized by severe hypoglycemia and long-term complications. The primary therapeutic approach is to maintain normoglycemia through meticulous dietary management. This study aims to evaluate the initial presentation and long-term follow-up outcomes of cases monitored with GSD 1a. Furthermore, it aims to conduct a comprehensive assessment of metabolic parameters, dietary intake records, and Continuous Glucose Monitoring System (CGMS) data. Following this assessment, the study intends to re-evaluate the holistic outcomes of subsequent dietary revisions, individualized patient and family education, and vitamin supplementation after a six-month follow-up period. </p><p><strong>Materials and Methods: </strong>Nine patients genetically diagnosed with Glycogen Storage Disease Type 1a (GSD 1a), who are under follow-up at the Ege University Faculty of Medicine, Department of Pediatric Metabolism and Nutrition, were included in the study. The clinical and metabolic parameters of the patients at admission and during follow-up were analyzed. Following a comprehensive evaluation of current Continuous Glucose Monitoring System (CGMS) data, nutritional balance, and biochemical metabolites, an intervention consisting of dietary revision (D), education (E), and vitamin-biotin (10mg/day p.o.) (V) (DEV) was implemented. The patients were re-evaluated after a six-month follow-up period. </p><p><strong>Results: </strong>The ages of the nine patients included in the study ranged from 4 to 29 years, with a mean age of 17±9 years. The mean age at initial presentation was 30.67±47.5 months, while the mean age at diagnosis was 66.22±60.43 months. Of the cases, 55.6% were male and 44.4% were female. At the time of presentation, total cholesterol, LDL, triglyceride, biotinidase activity, blood gas lactate, AST, ALT, GGT, lactic acid (LA), and pyruvic acid (PA) levels were found to be higher than normal. The total follow-up duration was 132 years, with an average follow-up of 14.6 years per patient. During the follow-up period, a downward trend was observed in AST, ALT, and LA levels. Following the initial Continuous Glucose Monitoring System (CGMS) implementation; interventions including dietary revision, education, and vitamin supplementation were performed. In the evaluation of dietary revisions, an increase was observed in daily caloric intake, protein (g/kg), protein percentage, and the number of daily meals, while a decrease was noted in starch (g/kg) consumption. A comparative analysis of laboratory parameters before and after these interventions showed a significant decrease in biotinidase activity and triglycerides, whereas HDL levels increased. Statistical analysis of the CGMS data revealed a positive correlation between the percentage of </p><p>xiii </p><p>hyperglycemia and total cholesterol. Additionally, BMI was positively correlated with total cholesterol, and the total percentage of hyperglycemia was positively correlated with triglycerides. A negative correlation was identified between the presence of percutaneous endoscopic gastrostomy (PEG) in patients and the standard deviation of CGMS data prior to DEV intervention; similarly, after the intervention, a negative correlation was observed between PEG presence and both the standard deviation and the percentage of time spent in hyperglycemia in CGMS data. A positive correlation was found between the percentage of time spent in hypoglycemia on pre-intervention CGMS and biotinidase levels as well as LDL levels. A negative correlation was noted between the percentage of time in range and lactic acid levels in both pre- and post-intervention CGMS data, and a similar negative correlation was detected between time in range and pyruvic acid levels in post-intervention CGMS data. Additionally, PEG presence showed a positive correlation with the percentage of time in range in both pre- and post-intervention analyses, while a negative correlation was found between PEG presence and the frequency of severe hypoglycemia in post-intervention CGMS data. </p><p><strong>Conclusion: </strong>As a clinical result of the study, a decrease in biotinidase enzyme activity and triglyceride levels, and an increase in HDL levels were observed in cases of Glycogen Storage Disease Type 1a following diet revision, education, and vitamin supplementation (biotin 10 mg/day). Furthermore, CGMS data indicated that as the duration spent in hyperglycemia increased, the patients BMI values were higher, and dyslipidemia (total cholesterol and triglycerides) worsened accordingly. </p><p>In the pre-intervention CGMS data, it was also observed that biotinidase activity and LDL levels increased as the duration spent in hypoglycemia lengthened. </p><p>The combined evaluation of CGMS use, consumption lists, and biochemical data in GSD Type 1a allows for the creation of personalized diet programs; through diet revision, individual and family education, and vitamin supplementation (biotin), improvement in the metabolic complications of the disease has been achieved. </p>