Treatment with testosterone increases proliferation of influenza virus as well as protein anabolism. A relative lack of testosterone caused by castration is associated with a diminished rate of virus growth. When protein catabolism is increased by ACTH or cortisone, the rate of virus proliferation decreases. These results suggest the existence of a correlation between alterations of protein met...

Escherichia coli has four gluconate transporters, GntP, GntU, GntT, and IdnT, which are members of the major facilitator superfamily. The physiological function of GntP was previously unknown and is the subject of this study. GntP is not induced by gluconate, and despite being located adjacent to genes involved in glucuronate catabolism, gntP does not encode a glucuronate transporter. Here we i...

We studied two groups of six patients scheduled for gastrointestinal surgery; they were allocated randomly to receive high- or low-dose fentanyl anaesthesia. The confounding effect of protein balance, before the trauma of surgery, on postoperative nitrogen excretion was controlled by standardized protein intake before operation, supplemented by adequate calories. The high-dose group had signifi...

Trehalose biosynthesis and its hydrolysis have been extensively studied in yeast, but few reports have addressed the catabolism of exogenously supplied trehalose. Here we report the catabolism of exogenous trehalose by Candida utilis. In contrast to the biphasic growth in glucose, the growth of C. utilis in a mineral medium with trehalose as the sole carbon and energy source is aerobic and exhi...

1. Fibrinogen catabolism was studied in ten rabbits before and after suddenly elevating the intravascular pool by injecting a single dose of homologous fibrinogen equivalent to 1843% of the corresponding protein already present in this pool. Of the two metabolic tracers used, [13'I]fibrinogen was injected 3 4 days before and [1251]fibrinogen at the time of introducing the change. 2. Analysis of...

Adipose tissue plays important roles in regulating carbohydrate and lipid homeostasis, but less is known about the regulation of amino acid metabolism in adipocytes. Here we applied isotope tracing to pre-adipocytes and differentiated adipocytes to quantify the contributions of different substrates to tricarboxylic acid (TCA) metabolism and lipogenesis. In contrast to proliferating cells, which...

A large amount of gamma-aminobutyric acid (GABA) was found to accumulate in tomato (Solanum lycopersicum) fruits before the breaker stage. Shortly thereafter, GABA was rapidly catabolized after the breaker stage. We screened the GABA-rich tomato cultivar 'DG03-9' which did not show rapid GABA catabolism after the breaker stage. Although GABA hyperaccumulation and rapid catabolism in fruits is w...

Model-driven systems engineering has been more fascinating process for the microbial production of biofuel and bio-refineries in chemical and pharmaceutical industries. Genome-scale modeling and simulations have been guided for metabolic engineering of Clostridium species for the production of organic solvents and organic acids. Among them, Clostridium sticklandii is one of the potential organi...

Prolonged surgical stress and advanced malignant disease lead to systemic catabolism characterized by depletion of muscle protein and oxidation of skeletal muscle BCAA. BCAA oxidation provides energy for muscle and other organs and is the precursor for amino acid synthesis to replenish alanine and glutamine depleted in catabolic states. Persistent excessive catabolism leads to skeletal muscle w...