Marvin E. Ament

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BACKGROUND Neurogenin-3 (NEUROG3) is expressed in endocrine progenitor cells and is required for endocrine-cell development in the pancreas and intestine. The NEUROG3 gene (NEUROG3) is therefore a candidate for the cause of a newly discovered autosomal recessive disorder characterized by generalized malabsorption and a paucity of enteroendocrine cells. (More)
Patients on long-term total parenteral nutrition were found to have elevated aluminum (AI) levels in bone, and plasma, with the casein in the total parenteral nutrition solution the source of A1. Substitution of amino acids for casein was followed by a fall in urinary and plasma A1. Thus, parenteral loading with A1 increases tissue A1, particularly in bone.(More)
Patients receiving long-term total parenteral nutrition (TPN) develop hepatic steatosis as a complication. Our previous studies have shown this to be caused, at least in part, by choline deficiency. We studied four patients (1 man, 3 women) aged 50 +/- 13 years who had low plasma-free choline concentrations 4.8 +/- 1.7 (normal, 11.4 +/- 3.7 nmol/mL). The(More)
BACKGROUND Numerous animal studies have demonstrated intestinal villus atrophy occurs when luminal nutrition is withheld and total parenteral nutrition (TPN) is provided. Intestinal morphologic and functional changes have not been well studied in humans during TPN. METHODS Eight normal volunteers were hospitalized in the Clinical Research Center for 3(More)
Forty of 82 patients with recurrent pneumonias and/or clinical asthma were found to have gastroesophageal reflux (GER) by the criteria of two or more of five tests positive for GER. Of 36 patients with GER followed for response to therapy, 32 patients attempted medical therapy and four had fundoplications. Ten of 32 (31%) patients on medical therapy had(More)
Seventy-three medical records of pediatric patients admitted for acetaminophen overdose were reviewed. Twenty-eight patients (39%) had severe liver toxic effects, and six of them underwent liver transplantation. Multiple miscalculated overdoses given by parents, with delay in therapy, are risk factors and the major cause of overdose in children 10 years of(More)
An unusual metabolic bone disease which developed in 11 adults receiving total parenteral nutrition (TPN) for more than 3 months was characterised by the insidious onset of bone pain which became very severe and caused considerable disability. Serum levels of calcium, phosphorus, 25-hydroxy-vitamin D, and serum immunoreactive parathyroid hormone were(More)
OBJECTIVE To analyze the outcome of children with short bowel syndrome (SBS) who required long-term parenteral nutrition (PN). STUDY DESIGN Retrospective analysis of children (n=78) with SBS who required PN >3 months from 1975 to 2000. STATISTICS univariate analysis, Kaplan-Meier method, and Cox proportional regression model were used. RESULTS We(More)