Optimum reaction conditions at 30#{176} ± 0.5#{176} for two continuous spectrophotometric assay procedures, lactate to pyruvate (LP) and pyruvate to lactate (PL), were determined with respect to pH at 30#{176} (pH30) substrate concentration, and coenzyme concentration for the human LDH isoenxymes. For the P L procedure, broad pH30 optima were within the range of 7.20-7.40 for all the LDH isoenz...

For the measurement of lactate dehydrogenase (LDH) isoenzyme biosynthesis a new method is presented which is based on the quantitative hybridization of isoenzyme MI with isoenzyme Hq. After reversible dissociation the formation of active LDH M4 was more rapid and occurred to a greater extent than the formation of LDH Hq. The formation of hybrid isoenzymes from the two subunits resulted in an in...

The patient is a 7-year-old girl with a history of repaired gastroschisis and short gut syndrome. She presented with a 4-day history of progressive encephalopathy, truncal ataxia, and omnidirectional gaze-evoked nystagmus. Peripheral lactate was 7.1 mmol/L. Serum thiamine level was decreased (,5 nmol/L). Brain magnetic resonance with spectroscopy is shown in the figure. A clinical diagnosis of ...

BACKGROUND: Children diagnosed with non-Hodgkin lymphoma (NHL) respond well to therapy resulting in relatively good prognosis. The exceptions are those who continue to have minimal residual disease (MRD). MRD NHL cells have been characterized as having increased mitochondrial DNA (mtDNA) copy numbers with increased expression of citrate synthase and isocitrate dehydrogenase. A proof-of-concept ...