BACKGROUND Information regarding growth hormone (GH) therapy in neonatal patients with methylmalonic academia (MMA) is lacking. We present our experience with GH therapy in neonatal patients with MMA. METHODS Four neonatal patients with mut 0 type MMA were identified through newborn screening for elevated propionylcarnitine (C3) levels. GH therapy (0.6 IU/kg/week, subcutaneously) was prescrib...

An automated method for estimation of methylmalonic acid in urine is described that compares well with results obtained by a manual method. The temperature at which color is developed can be set anywhere between ambient and 90°C without loss of linearity over a certain range of concentrations. The higher temperatures have greater sensitivity but a smaller linear range than do lower incubation-t...

BACKGROUND AND AIMS Increased propionylcarnitine levels in newborn screening are indicative for a group of potentially severe disorders including propionic acidemia (PA), methylmalonic acidemias and combined remethylation disorders (MMACBL). This alteration is relatively non-specific, resulting in the necessity of confirmation and differential diagnosis in subsequent tests. Thus, we aimed to de...

BACKGROUND The standard screening test for vitamin B12 deficiency, measurement of total plasma vitamin B12, has limitations of sensitivity and specificity. Plasma vitamin B12 bound to transcobalamin (holoTC) is the fraction of total vitamin B12 available for tissue uptake and therefore has been proposed as a potentially useful alternative indicator of vitamin B12 status. METHODS We compared t...

BACKGROUND Cobalamin and folate are essential micronutrients and are important in DNA and RNA synthesis, cell proliferation, growth, hematopoiesis, and cognitive function. However, data on cobalamin and folate status are lacking particularly from young children residing in low and middle income countries. OBJECTIVE To measure cobalamin and folate status and identifies their predictors among 6...

BACKGROUND Supplementation with high doses of oral cobalamin is as effective as cobalamin administered by intramuscular injection to correct plasma markers of vitamin B(12) deficiency, but the effects of lower oral doses of cobalamin on such markers are uncertain. METHODS We conducted a randomized, parallel-group, double-blind, dose-finding trial to determine the lowest oral dose of cyanocoba...