Clinical, biochemical, and radiologic profiles of Filipino patients with 6-Pyruvoyl-Tetrahydrobiopterin Synthase (6-PTPS) deficiency and their neurodevelopmental outcomes

Background@#Six-pyruvoyl-tetrahydrobiopterin synthase (6-PTPS) deficiency is an inherited metabolic disorder which results in tetrahydrobiopterin (BH4) deficiency causing hyperphenylalaninemia.@*Objective@#This study aimed to describe the clinical, biochemical, and radiologic profiles, and neurologic and developmental outcomes of patients diagnosed with 6-pyruvoyl tetrahydrobiopterin (PTPS) deficiency through newborn screening and confirmed by BH4 loading test, pterin analysis, and gene sequencing who were following-up with the metabolic team.@*Methods@#The research was a single-center descriptive case series study design that was done at the Philippine General Hospital, a tertiary government hospital. The clinical, biochemical, radiologic profiles and neurodevelopmental evaluation of each patient were described.@*Results@#Nine patients from 1 year 2 months to 14 years 5 months of age were enrolled in the study. Clinical manifestations before treatment were hypotonia, poor suck, and seizure. The most common clinical manifestation even after treatment initiation was seizure. The mean phenylalanine level on newborn screening was 990.68 umol/L, but after treatment was started, mean levels ranged from 75.69 to 385.09 umol/L. Two of the patients had focal atrophy of the posterior lobe on brain imaging. Pathogenic variants on molecular analysis were all missense, with two predominant variants, c.155A>G and c.58T>C. Eight of the nine patients had varying degrees of developmental delay or intellectual disability, while the remaining patient had signs of a learning disorder. @*Conclusion@#Newborn screening has played a crucial role in the early identification and management of patients with hyperphenylalaninemia due to 6-PTPS deficiency. Confirmation of diagnosis through determination of DHPR activity, urine pterins and/or molecular analysis is necessary for appropriate management. However, despite early initiation of treatment, neurodevelopmental findings of patients with 6-PTPS deficiency were still unsatisfactory.

Telegenetics services in a tertiary hospital: Utility and patient satisfaction

Background@#Telegenetics has been a very useful platform to continue the different services offered by the clinical genetics team especially during the COVID-19 pandemic, when this mode of care had been maximized.@*Objective@#This paper aimed to present the process of telegenetics in a tertiary hospital and the feedback for this service through patient satisfaction surveys. @*Methods@#Telegenetics consultation is divided into three phases: pre-consultation, consultation, and post-consultation. Patient satisfaction in the delivery of genetics services were obtained through a survey answered by patients/caregivers after telegenetics consultation. Ratings of patient satisfaction on telegenetics consultation during the pandemic (September 2020 to February 2021) were compared from that of face-to-face consultations before the pandemic (September 2019 to February 2020).@*Results@# In 2020, there were a total of 1,228 consultations made via telegenetics. Of which, 319 consultations were for the metabolic service, 138 for dysmorphology, 207 for genetic counseling, and 564 for dietary counseling. New patients comprised 13.84% of the consultations and 86.16% were from follow-up patients. In 2021, there were a total of 3,124 consultations made via telegenetics. Of which, 617 consultations were for the metabolic service, 688 for dysmorphology, 961 for genetic counseling, and 858 for dietary counseling. New patients comprised 12.93% of the consultations and 87.07% were from follow-up patients. Over a period of 6 months, pre-pandemic (face-to-face consultation) and pandemic (telegenetics) patient satisfaction survey results showed no significant difference on the results for both new patient consultations and follow-up patient consultations that is a standard satisfactory rating of at least 3 (satisfactory) on customer satisfaction by more than 70% of the respondents. @*Conclusion@#Patient satisfaction ratings on the utility of telegenetics was comparable to that of face-to-face consultations. Its use has shown benefits like cost-effectiveness, time efficiency, improved accessibility, and psychological benefits as some patients fear a hospital setting during the pandemic. It also has limitations like possible technical difficulties during consultations and limited opportunity for physical examination, establishing rapport, and exploring psychosocial issues. Hence it is important to consider the possibility of a telegenetics consultation as an alternative to a face-to-face consultation.

Clinical and biochemical profiles of Filipino patients with distal urea cycle disorders detected by abnormal expanded newborn screening

Objective@#The study is a retrospective review which provides preliminary data on the correlation between biochemical profiles and initial clinical manifestation of patients diagnosed to have argininosuccinate synthetase deficiency (ASSD) and argininosuccinate lyase deficiency (ASLD) detected by expanded newborn screening (ENBS). @*Methods@#This is a study of five distal UCD patients initially detected by elevated citrulline on ENBS. Medical charts of the patients were reviewed. The initial clinical manifestations of the patients were correlated with results of biochemical tests. @*Results@#There were four cases of ASLD and one case of ASSD reviewed in this study. All cases of ASLD were confirmed by the presence of argininosuccinic acid (ASA) in the urine metabolic screen (UMS). The plasma citrulline level of the ASSD patient is significantly elevated as compared to the ASLD patients (2,690 µmol/L; NV: 10-45 µmol/L). The ASSD patient and one ASLD patient were symptomatic within the first six days of life. Both presented with significantly elevated plasma ammonia, citrulline and glutamine levels. Three ASLD patients were asymptomatic on initial screening. @*Conclusion@#ENBS has shown importance in the early detection and management of ASSD and ASLD. Early initiation of management may prevent hyperammonemic crises. Long term outcome studies are needed to look into the correlation of neurodevelopmental outcome with lifelong accumulation of citrulline and glutamine in ASSD and ASA in ASLD.

Gaps in the newborn screening process: Using maple syrup urine disease as a case

@#Saving babies from mental retardation and death is the aim of the newborn screening program. A complex process of sample collection, processing and feedback is undertaken before reaching this goal. As with other systems, the newborn screening program is not perfect and periodic review is needed to continually improve services. Using maple syrup urine disease (which is the most common inborn error of metabolism detected through newborn screening) as an index case, this paper aims to present the gaps in diagnosis and management by citing cases and providing a commentary.

Telegenetics services in a tertiary hospital: Utility and patient satisfaction

Background@#Telegenetics has been a very useful platform to continue the different services offered by the clinical genetics team especially during the COVID-19 pandemic, when this mode of care had been maximized. @*Objective@#This paper aimed to present the process of telegenetics in a tertiary hospital and the feedback for this service through patient satisfaction surveys. @*Methods@#Telegenetics consultation is divided into three phases: pre-consultation, consultation, and post-consultation. Patient satisfaction in the delivery of genetics services were obtained through a survey answered by patients/caregivers after telegenetics consultation. Ratings of patient satisfaction on telegenetics consultation during the pandemic (September 2020 to February 2021) were compared from that of face-to-face consultations before the pandemic (September 2019 to February 2020). @*Results@#In 2020, there were a total of 1,228 consultations made via telegenetics. Of which, 319 consultations were for the metabolic service, 138 for dysmorphology, 207 for genetic counseling, and 564 for dietary counseling. New patients comprised 13.84% of the consultations and 86.16% were from follow-up patients. In 2021, there were a total of 3,124 consultations made via telegenetics. Of which, 617 consultations were for the metabolic service, 688 for dysmorphology, 961 for genetic counseling, and 858 for dietary counseling. New patients comprised 12.93% of the consultations and 87.07% were from follow-up patients. Over a period of 6 months, pre-pandemic (face-to-face consultation) and pandemic (telegenetics) patient satisfaction survey results showed no significant difference on the results for both new patient consultations and follow-up patient consultations that is a standard satisfactory rating of at least 3 (satisfactory) on customer satisfaction by more than 70% of the respondents. @*Conclusion@#Patient satisfaction ratings on the utility of telegenetics was comparable to that of face-to-face consultations. Its use has shown benefits like cost-effectiveness, time efficiency, improved accessibility, and psychological benefits as some patients fear a hospital setting during the pandemic. It also has limitations like possible technical difficulties during consultations and limited opportunity for physical examination, establishing rapport, and exploring psychosocial issues. Hence it is important to consider the possibility of a telegenetics consultation as an alternative to a face-to-face consultation.