Nicholas E. Tawa

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Muscle wasting accompanies aging and pathological conditions ranging from cancer, cachexia, and diabetes to denervation and immobilization. We show that activation of NF-kappaB, through muscle-specific transgenic expression of activated IkappaB kinase beta (MIKK), causes profound muscle wasting that resembles clinical cachexia. In contrast, no overt(More)
Muscle wasting is a major feature of the cachexia asso-One Joslin Place ciated with diverse pathologies such as cancer, bacte-Several cytokines have been implicated in the patho-8 Department of Pediatrics genesis of muscle wasting, most notably TNF-␣, a proin-9 Department of Physical Medicine flammatory cytokine that was originally called " cachec-and(More)
Several observations have suggested that the enhanced proteolysis and atrophy of skeletal muscle in various pathological states is due primarily to activation of the ubiquitin-proteasome pathway. To test this idea, we investigated whether peptide aldehyde inhibitors of the proteasome, N-acetyl-leucyl-leucyl-norleucinal (LLN), or the more potent(More)
BACKGROUND Carcinoid tumors in the breast are rare. Most represent metastases from other primary sites, but commonly are mistaken for primary breast lesions. METHODS A literature search of the English language found 59 cases of carcinoid tumors in the breast, 21 (36%) of which were metastases. RESULTS We present an additional 3 cases of carcinoid tumors(More)
BACKGROUND We tested the safety of a nonviral somatic-cell gene-therapy system in patients with severe hemophilia A. METHODS An open-label, phase 1 trial was conducted in six patients with severe hemophilia A. Dermal fibroblasts obtained from each patient by skin biopsy were grown in culture and transfected with a plasmid containing sequences of the gene(More)
When rats are fed a protein deficient (PD) diet for 7 days, rates of proteolysis in skeletal muscle decrease by 40-50% (N. E. Tawa, Jr., and A. L. Goldberg. Am. J. Physiol. 263 (Endocrinol. Metab. 26): E317-325, 1992). To identify the underlying biochemical adaptations, we measured different proteolytic processes in incubated muscles. The capacity for(More)
This study was designed to examine circulating and urine cytokine levels in patients receiving long-term home total parenteral nutrition (TPN) support. Twelve patients who had been receiving home TPN for more than 1 year (range, 1.3–19.5 years) were enrolled for study. To avoid the potential confounding effects of intercurrent infection, patients were(More)
PURPOSE To determine if melanoma within the tumor microenvironment will result in immunosuppression within the draining lymph node as measured by down-regulation of T-cell receptor zeta (TCR zeta) expression. EXPERIMENTAL DESIGN Patients with clinical stage I to III melanoma undergoing wide local excision and sentinel lymph node biopsy or therapeutic(More)
To define the adaptations that conserve amino acids and muscle protein when dietary protein intake is inadequate, rats (60-70 g final wt) were fed a normal or protein-deficient (PD) diet (18 or 1% lactalbumin), and their muscles were studied in vitro. After 7 days on the PD diet, both protein degradation and synthesis fell 30-40% in skeletal muscles and(More)
BACKGROUND Certain patients receiving home total parenteral nutrition (HPN) are likely to develop iron-deficiency anemia because of inadequate absorption or chronic iron loss from gastrointestinal lesions. The objective of this study was to examine the incidence and prevalence of iron deficiency anemia in patients on long-term HPN (>6 months) and to(More)