Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0034063 (pulmonary edema)
 10,665 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Ruminal administration of 3-methylindole in goats severe pulmonary edema and respiratory distress. Electron microscopic studies of lungs reveal extensive degeneration and necrosis of alveolar membranous pneumocytes and bronchiolar epithelium. The necrosis of the pneumocytes is followed by proliferation of granular pneumocytes, which repopulate the alveolar basal lamina scaffold. 3-Methylindole may also induce proliferation of smooth endoplasmic reticulum in the remaining membranous pneumocytes and nonciliated columnar cells, indicating that these two cell types are involved in the xenobiotic function of the lung. The results suggest that 3-methylindole in cigarette smoke may play an important role in the pathogenesis of small airway disease and emphysema, and that patients with severe liver diseases or portocaval shunt may be predisposed to diffuse alveolar damage by 3-methylindole produced in the intestinal tract.
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PMID:3-methylindole-induced pulmonary injury in goats. 86 17

The morphogenesis of pulmonary edema and bronchiolar injury induced by the toxic furan, 4-ipomeanol, was studied by combined light and transmission electron microscopy. Weanling male CD-1 mice received 47 mg 4-ipomeanol/kg body weight by intraperitoneal injection and were studied at intervals from 2 to 360 hours after treatment. Interstitial edema associated with damaged endothelial cells was observed as early as 2 hours after treatment. The most severe endothelial damage was observed from 12 to 24 hours after treatment and occurred in association with alveolar edema. Capillary endothelial cell damage was characterized by marked dilation of endoplasmic reticulum and perinuclear envelopes, marked swelling of mitochondria, separation of cytoplasmic processes from other endothelial cells and their basal laminae, and occasional disruptions in the plasmalemma. Endothelial cell lesions in small caliber veins were similar but less pronounced as compared with the alterations observed in capillary endothelium. Minimal changes were present in alveolar epithelial cells. Damage to nonciliated bronchiolar epithelial cells was first observed at 4 hours after injection. The most severe changes in nonciliated cells occurred from 36 to 48 hours after treatment and included swelling of endoplasmic reticulum, necrosis, and sloughing. There was also necrosis and sloughing of ciliated bronchiolar epithelial cells. Endothelial and bronchiolar epithelial repair and resolution of the alveolar edema were complete by 240 hours after treatment. It is concluded that the endothelium lining capillaries and small veins, in addition to the nonciliated bronchiolar epithelial cell, are early targets in the development of 4-ipomeanol toxicity in the mouse and that the endothelial cell injury plays a major role in the development of pulmonary edema in this species. The results further suggest the possibility that pulmonary endothelial cells have the capability of metabolizing xenobiotic compounds such as 4-ipomeanol to form ultimate toxins.
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PMID:Pulmonary endothelial and bronchiolar epithelial lesions induced by 4-ipomeanol in mice. 396 38

Selenium is an essential trace element at lower concentrations and toxic at higher concentration. Animals can metabolize both inorganic and organic forms and convert non methylated Se to mono--or di--or tri--methylated forms, of which, mono-methylated forms are most toxic. Glutathione reductase converts selenoglutathione to H2S in liver and erythrocytes and is ultimately excreted. Se effects the toxicities of xenobiotic agents, provides antagonistic effect to Sulphur and co-administration with Zn increase Se retention in certain organs. At its toxic level (4-8 ppm) it increases Cu contents of heart, liver and kidney and has detoxifying or protecting effect against Cd and Hg. It is a prosthetic group of several seleno metalloenzymes. The concentration of the element is decreased in serum/plasma or erythrocytes of patients of AIDS, trisomy-21, Crohn's and Down's syndrome, phenylketonurea, Keshan's disease and cancer. Rather, the element has antiproliferative and cancer protecting effect. Se content of testes increases considerably during pubertal maturation and, during Se deficiency, the supply to the testes has priority over the other tissues. The element is localized in the mitochondrial capsule protein (MCP) and is involved in biosynthesis of testosterone. Neither the age of mother nor the concentration of Se during pregnancy has any effect on weight of baby or the length of pregnancy. Se levels in human milk is affected by maternal intake and its requirements by infants and young children are higher for their rapid growth. Clinical symptoms of its toxicity include severe irritations of respiratory system, metallic taste in mouth, formication of nose, signs of rhinitis, lung edema and brancho-pneumonia. The typical garlic odour of breath and sweat is due to dimethyl-selenide.
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PMID:Selenium--its biological perspectives. 823 95