3201
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Han F, Chen XJ, You BR, Wang DH, Wang M, Xu YC, Liu CM. Initial analysis of 40,596 biopsy diagnoses. Chin Med J (Engl) 1983; 96:793-4. [PMID: 6426879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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3202
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Mao C, Ashby P, Wang M, McCrea D. Synaptic connection from muscle afferents to the motoneurons of various leg muscles in man. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/0013-4694(83)92248-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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3203
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Niederwieser A, Steinmann B, Exner U, Neuheiser F, Redweik U, Wang M, Rampini S, Wendel U. Multiple acyl-Co A dehydrogenation deficiency (MADD) in a boy with nonketotic hypoglycemia, hepatomegaly, muscle hypotonia and cardiomyopathy. Detection of N-isovalerylglutamic acid and its monoamide. HELVETICA PAEDIATRICA ACTA 1983; 38:9-26. [PMID: 6862997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A boy, aged 7 months, of consanguineous parents presented with an acute onset of vomiting, fever, nonketotic hypoglycemia and acidosis and died from cardiac arrest after ventricular fibrillation. He had hepatomegaly and echocardiographically a non-obstructive cardiomyopathy. Autopsy was not allowed. After birth the child had suffered from a severe respiratory distress syndrome, transient metabolic acidosis and had a sweaty feet odour. Later on, development was retarded with a severe muscular hypotonia. Post mortem, numerous unusual organic acids were found in high concentrations in urine, e.g. dicarbonic acids, 2-hydroxyisobutyric, isovaleric, 3-hydroxyisovaleric acid, N-acyl glycines, isovalerylglutamic acid and sarcosine. This pattern indicated deficiencies of several acyl-Co A dehydrogenases in the metabolism of leucine, isoleucine, valine, lysine, short-chain fatty acids and sarcosine. This could be confirmed using cultured skin fibroblasts which were shown to degrade the corresponding labeled substrates insufficiently to 14CO2. It is assumed that the functional multiple acyl-Co A dehydrogenation deficiency is caused by a deficiency of a common link in the electron transfer system of these dehydrogenases which is inherited autosomal recessively in this family. Among the 12 patients reported, 7 died within the first 5 days of age.
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3204
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Guo YJ, Jin FG, Wang P, Wang M, Zhu JM. Isolation of influenza C virus from pigs and experimental infection of pigs with influenza C virus. J Gen Virol 1983; 64 (Pt 1):177-82. [PMID: 6296296 DOI: 10.1099/0022-1317-64-1-177] [Citation(s) in RCA: 83] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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3205
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Arnott S, Chandrasekaran R, Hall IH, Puigjaner LC, Walker JK, Wang M. DNA secondary structures: helices, wrinkles, and junctions. COLD SPRING HARBOR SYMPOSIA ON QUANTITATIVE BIOLOGY 1983; 47 Pt 1:53-65. [PMID: 6574857 DOI: 10.1101/sqb.1983.047.01.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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3206
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Yin WB, Zhang L, Miao Y, Yu Z, Zhang Z, Zhueng C, Wang M, Li G, Liu Y, Jia Y, Ku X. The results of high-energy electron therapy in carcinoma of the oesophagus compared with telecobalt therapy. Clin Radiol 1983; 34:113-6. [PMID: 6401610 DOI: 10.1016/s0009-9260(83)80403-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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3207
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Yin WB, Wang M, Hwang YJ, Zhang LJ, Li G, Yu Z, Miao Y, Zhang C, Ku X. The results of radiation therapy in advanced carcinoma of the lung in the Beijing region of China. Clin Radiol 1983; 34:117-20. [PMID: 6822033 DOI: 10.1016/s0009-9260(83)80404-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
From 1958 to 1973, 682 patients with lung cancer were treated by radiation therapy in the Cancer Institute, Chinese Academy of Medical Sciences, Beijing, China. The clinical presentation, sex, age, histology and stage and palliative effects of radiation therapy were reported. The 1-, 3- and 5-year survival rates were 40.62, 8.94 and 3.81%, respectively. The prognostic factors such as staging, histology, combination with chemotherapy and response of tumours are discussed. The causes of failure are also analysed. It is suggested that improving the local control rate of squamous cell carcinoma would increase the survival rate.
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3208
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Lin MB, Zhang W, Zhao XW, Lu JX, Wang M, Chen LG. [Biotransformation of tetrandrine in rats and in men]. YAO XUE XUE BAO = ACTA PHARMACEUTICA SINICA 1982; 17:728-35. [PMID: 7168321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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3209
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Niederwieser A, Curtius HC, Wang M, Leupold D. Atypical phenylketonuria with defective biopterin metabolism. Monotherapy with tetrahydrobiopterin or sepiapterin, screening and study of biosynthesis in man. Eur J Pediatr 1982; 138:110-2. [PMID: 7094929 DOI: 10.1007/bf00441135] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Administration of a single dose of tetrahydrobiopterin dihydrochloride, 10--20 mg/kg orally, to a patient with dihydrobiopterin deficiency led to disappearance of clinical symptoms for 4 days, normalization of urinary phenylalanine and serotonin and decrease of elevated neopterin for 2--3 days. A dose-dependent stimulation of serotonin production was observed. A similar effect was noted with even lower doses of L-sepiapterin. The patient is now under monotherapy with tetrahydrobiopterin . 2 HCl, 2.5 mg/kg daily. Other patients with this disease may not respond as well. Results of screening for tetrahydrobiopterin deficiency in 228 cases with hyperphenylalaninemia, including 140 newborns, are reported. There is evidence that biopterin biosynthesis in human kidney and liver proceeds via a dioxo compound and L-sepiapterin.
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3210
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Guo YJ, Wang M, Jin FG, Wang P, Zhu JM, Meng FY, Gao SQ, Liu LL, Jin L, Wang YX, Zhang ZQ. [Surveys on orthomyxoviruses and paramyxoviruses in domestic and feral ducks in China (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1982; 4:32-6. [PMID: 6461429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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3211
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Endres W, Niederwieser A, Curtius HC, Wang M, Ohrt B, Schaub J. Atypical phenylketonuria due to biopterin deficiency. Early treatment with tetrahydrobiopterin and neurotransmitter precursors, trials of monotherapy. HELVETICA PAEDIATRICA ACTA 1982; 37:489-98. [PMID: 6761317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
This report presents the first case where an infant with tetrahydrobiopterin deficiency has been identified by screening of newborns with hyperphenylalaninemia for tetrahydrobiopterin deficiency. Therapy with L-Dopa, 5-hydroxytryptophan, Carbidopa and tetrahydrobiopterin was started at the age of seven weeks while the child received a normal diet. At that time already muscular hypotonia was observed. The girl, now 2 1/2 years old, shows slight muscular hypotonia and hypomotility, short periods of hypertonic extension of the limbs, and retardation of sensomotor and mental development of about 6-8 months. Monotherapy with tetrahydrobiopterin dihydrochloride, 20-40 mg/kg b.w., diminished the muscular hypotonia. The effect lasted however for only about 1 day. While urinary serotonin and phenylalanine remained normal for at least 3 days and neopterin was only slightly elevated, urinary free dopamine however remained low. Similar results were obtained after 1',2'-diacetyl tetrahydrobiopterin dihydrochloride administration, 20 mg/kg b.w.
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3212
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Skapski B, Wang M, Clark V, Swendseid ME. Influence of protein intake on S-adenosyl methionine decarboxylase activity in normal and chronically uremic rats. J Nutr 1981; 111:1658-61. [PMID: 7277043 DOI: 10.1093/jn/111.9.1658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The activity of S-adenosyl methionine decarboxylase (SAM decarboxylase), an enzyme mediating polyamine biosynthesis, was measured in liver and kidney of chronically uremic rats and their pair-fed controls. Effects of protein intake were assessed in groups of rats fed either 8 or 18% casein or switched from 18 to 70% casein for 14 hours. In control rats, both hepatic and renal SAM decarboxylase activities increased with the higher levels of dietary casein. In uremic rats, SAM decarboxylase activity was not responsive to alterations in protein intake. Hepatic and renal SAM decarboxylase activity was significantly higher in control rats than in uremic rats, but this was due to increases in activity that occurred with diets containing higher amounts of protein (18 and 70% casein versus 8% casein).
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3213
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Resurreccion AV, Doster JM, Wang M, Caster WO. The effect of copper and protein on iron metabolism in rats fed a cereal diet. THE SCIENCE OF THE TOTAL ENVIRONMENT 1981; 20:49-56. [PMID: 7280660 DOI: 10.1016/0048-9697(81)90035-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Weanling male white rats were fed a diet containing a commercially available breakfast cereal. In 28 days they developed a mild anemia coupled with an increased amount of iron in the liver. In parallel work, this same diet was supplemented in a factorial fashion with casein, iron, copper and zinc. The zinc had no effect. Copper supplementation increased the hemoglobin level. Casein decreased liver iron. The copper and casein, when fed together, produced results approaching normal control levels. Supplementation of the diet with additional iron did not increase the hemoglobin or hematocrit but it did further increase iron storage in the liver. It is suggested that cereal enrichment programs might do well to consider copper and protein rather than focus total attention to additional iron and zinc.
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3214
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Wang M, Schutz I, Kopple J, Swendseid M. Activities of ornithine aminotransferase and ornithine decarboxylase in chronically uremic rats. Life Sci 1981; 28:2349-54. [PMID: 7253824 DOI: 10.1016/0024-3205(81)90499-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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3215
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Caster WO, Wang M. Dietary aluminum and Alzheimer's disease--a review. THE SCIENCE OF THE TOTAL ENVIRONMENT 1981; 17:31-36. [PMID: 7010599 DOI: 10.1016/0048-9697(81)90105-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Current evidence suggests that dietary aluminum is neither an essential nutrient nor a toxic element causing neurological damage. The phosphate and fluoride salts of aluminum are very insoluble. When fed in excess, aluminum increases the dietary needs for these anions. Aluminum hydroxide is used as an antacid that can prevent the phosphatemia seen in severe kidney damage. In Alzheimer's disease there is progressive decrease in brain mass with the accumulation of phospholipid-rich cell debris. These membrane tangles tend to accumulate aluminum and are easily stainable with silver.
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3216
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Wang M, Kopple JD, Swendseid ME. Metabolism of 1-14C-ornithine and 1,4-14C-putrescine in chronically uremic and control rats. Metabolism 1980; 29:773-6. [PMID: 6772923 DOI: 10.1016/0026-0495(80)90202-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The metabolism of ornithine and putrescine was studied in vivo in chronically uremic and control rats. Rats were injected intraperitoneally with 1,4-14C-ornithine or 1,4-14C-putrescine and expired 14CO2 was collected for 4 hr. After injection of 1-14C-ornithine. 14CO2 expiration was decreased in uremic rats as compared to controls. Conversely, after 1,4-14C-putrescine injection, expiration of 14CO2 was increased in uremic rats as compared to controls. Four hours after the injection of 1-14C-ornithine, there was more radioactivity in liver and muscle and less radioactivity in kidney of uremic rats as compared to the respective sources in control rats. In uremic rats, 4 hr after 1,4-14C-putrescine injection, the radioactivity retained in the muscle and plasma was greater than in corresponding sources in control rats; whereas the radioactivity retained in uremic liver and kidney was similar to that of control rats. The greater putrescine-derived radioactivity retained in uremic tissues reflects either the retention of injection racer compounds, or retention or decreased catabolism of putrescine metabolites. From 14CO2 expiration data obtained, it appears that ornithine catabolism is reduced while putrescine catabolism is increased in uremia.
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3217
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Karr AE, Gebert W, Wang M. Extraction of whole fermentation broth with karr reciprocating plate extraction column. CAN J CHEM ENG 1980. [DOI: 10.1002/cjce.5450580217] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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3218
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Li M, Lu S, Ji C, Wang M, Cheng S, Jin C. Formation of carcinogenic N-nitroso compounds in corn-bread inoculated with fungi. SCIENTIA SINICA 1979; 22:471-7. [PMID: 112676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
DMNA, DENA and MBNA are formed in corn-bread which has been inoculated with the most common species of fungi found in foodstuffs of Lin Xian County, Henan Province, such as F. moniliforme, A. flavus and others, and then, added with small amount of NaNO2 after a few days of incubation. These carcinogenic N-nitroso compounds can induce cancer of the liver or/and esophagus in experimental animals. Results of the present study show the capability of some fungi to produce chemical carcinogens as well as mycotoxins in contaminated food, and thus, open a new field of research in cancer etiology.
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3219
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Tam CF, Kopple JD, Wang M, Swendseid ME. Diamine oxidase activity in plasma and urine in uremia. Nephron Clin Pract 1979; 23:23-7. [PMID: 109782 DOI: 10.1159/000181601] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Diamine oxidase activity was measured in plasma or urine in 12 normal men, 4 men with chronic liver or heart disease, 13 men with chronic renal failure, and 12 men undergoing maintenance hemodialysis. Also in five studies in 4 patients, plasma diamine oxidase activity and total amine levels were measured at hourly intervals during a hemodialysis treatment. Plasma diamine oxidase activity was normal in patients with liver or heart disease and was at least three times normal in chronically uremic patients and in patients undergoing maintenance hemodialysis. Plasma diamine oxidase activities before and after a hemodialysis therapy were similar and did not change during dialysis until the 4th hour when they fell transiently; plasma total amine levels, which were elevated initially, tended to rise during the 4th hour of dialysis. Urinary diamine oxidase activity was reduced in the chronically uremic patients as compared to normal subjects. These observations are consistent with three alterations in diamine oxidase in patients with renal failure: activity (a) is increased in plasma of chronically uremic patients and those undergoing maintenance hemodialysis, (b) does not increase normally in response to heparin administration during dialysis therapy, and (c) is reduced in urine of chronically uremic patients.
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3220
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Hunzicker-Dunn M, Wang M, Jungmann R. Effect of the administration of an ovulatory dose of HCG on the subcellular distribution of follicular protein kinase. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1979; 112:113-21. [PMID: 223382 DOI: 10.1007/978-1-4684-3474-3_13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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3221
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Cameron HU, Wang M, Koreska J. Internal fixation of slipped femoral capital epiphyses. Clin Orthop Relat Res 1978:148-53. [PMID: 743821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The problems related to internal fixation for the treatment of slipped femoral capital epiphyses were reviewed in 164 cases and by a questionnaire of 59 orthopedic surgeons. Significant problems were reported with all fixation devices. With Trifin nails, the main difficulty was getting them to stay in in place. With threaded pins, there was difficulty removing them. The best fixation was obtained with the cast Vitallium Knowles pin, but it requires additional modification and improvement.
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3222
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Swendseid ME, Wang M, Schutz I, Kopple JD. Metabolism of urea cycle intermediates in chronic renal failure. Am J Clin Nutr 1978; 31:1581-6. [PMID: 685873 DOI: 10.1093/ajcn/31.9.1581] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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3223
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Wang M, Chan W, Schutz I, Kopple JD, Swendseid ME. Plasma arginine and ornithine levels and selected enzyme activities in uremic rats fed various amounts of arginine. Life Sci 1978; 22:2129-35. [PMID: 672450 DOI: 10.1016/0024-3205(78)90457-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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3224
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Pennisi AJ, Wang M, Kopple JE. Effects of protein and amino acid diets in chronically uremic and control rats. Kidney Int 1978; 13:472-9. [PMID: 713283 DOI: 10.1038/ki.1978.70] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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3225
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Kopple JD, Tam CF, Wang M, Swendseid ME. Diamine oxidase in renal failure. KIDNEY INTERNATIONAL. SUPPLEMENT 1978:S20-5. [PMID: 99597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The enzyme, diamine oxidase, is present in many tissues and plays a role in the metabolism of certain amines, some of which may be toxic. In renal failure, plasma diamine oxidase activity was found to be increased in chronically uremic patients and before and after dialysis therapy in patients undergoing maintenance hemodialysis. Diamine oxidase activity was decreased in urine of the chronically uremic patients as compared to normal subjects. In chronically uremic rats, diamine oxidase activity was observed to be increased in plasma and reduced in urine as compared to sham-operated, pair-fed control rats. In the uremic rats diamine oxidase activity was also decreased in kidney and unchanged in liver and muscle. Total amine levels were elevated in plasma and reduced in urine of patients and rats with chronic renal failure. Although the clinical significance of abnormal diamine oxidase activity in renal failure is not clear, it is possible that this enzyme may have a pathophysiologic role in uremia.
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3226
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Kopple JD, Gordon SI, Wang M, Swendseid ME. Factors affecting serum and urinary guanidinosuccinic acid levels in normal and uremic subjects. THE JOURNAL OF LABORATORY AND CLINICAL MEDICINE 1977; 90:303-11. [PMID: 886215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Guanidinosuccinic acid (GSA) was measured in serum and urine from six normal subjects, 26 chronically uremic patients, and 17 patients undergoing maintenance hemodialysis. All normal subjects and 22 chronically uremic patients were fed diets providing 21 gm of essential amino acids or 20, 40, or 60 gm/day of protein. Serum GSA was usually undetectable in normal subjects and was increased in uremic patients (0.99 +/- S.D. 044. mg/100 ml). Serum creatinine and urea nitrogen were each correlated with serum GSA in the normal and uremic subjects combined and in uremic patients alone. Serum GSA was greater in hemodialysis patients (1.43 +/- 0.56 mg/100 ml) than in uremic patients (p less than 0.02) and decreased by 39% +/- 21 during hemodialysis in five patients. Serum GSA and the serum GSA/creatinine ratio tended to decrease with low protein intake in the uremic patients. Urinary GSA was increased in uremic patients (30.5 +/- 12.9 mg/day) as compared to that in normal subjects (7.5 +/- 1.9 mg/day), was greater in uremic patients than in normal subjects at each level of protein intake, and was directly correlated with protein intake and urinary urea and total nitrogen in both normal and uremic subjects. In three uremic patients who developed intercurrent illnesses, urinary GSA rose transiently. These results indicate four factors which affect serum or urinary GSA levels: (1) renal function, (2) protein intake, (3) catabolic stress, and (4) hemodialysis therapy.
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3227
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Siassi F, Wang M, Kopple JD, Swendseid ME. Brain serotonin turnover in chronically uremic rats. THE AMERICAN JOURNAL OF PHYSIOLOGY 1977; 232:E526-8. [PMID: 871160 DOI: 10.1152/ajpendo.1977.232.5.e526] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Brain serotonin turnover was investigated in chronically uremic and sham-operated pair-fed control rats. Animals were injected ip with 100 mg/kg body wt of pargyline HCl, a nonreversible monoamine oxidase inhibitor, and decapitated 0, 30 and 60 min later. The level of total tryptophan in plasma was decreased, and that of free tryptophan was increased in the uremic group. Uremic and control rats had similar concentrations of tryptophan and serotonin at 0 and 30 min after pargyline administration. However, the brain serotonin concentration was elevated in the uremic group 60 min after pargyline treatment. The brain serotonin turnover rate was higher and serotonin turnover time was lower in the uremic group. These results indicate that uremic stress, in addition to altering plasma tryptophan levels, also affects brain serotonin turnover.
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3228
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Siassi F, Wang M, Kopple JD, Swendseid ME. Plasma tryptophan levels and brain serotonin metabolism in chronically uremic rats. J Nutr 1977; 107:840-5. [PMID: 558284 DOI: 10.1093/jn/107.5.840] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Plasma tryptophan (Trp) levels and brain concentrations of Trp, serotonin, and 5-hydroxyindoleacetic acid (5-HIAA) were measured in chronically uremic rats fed either 11% or 18% casein diets for 8 to 12 weeks. Uremic rats had increased levels of plasma urea nitrogen and 5-HIAA when compared with sham-operated pair-fed controls. The level of plasma total Trp decreased in both uremic groups and the level of plasma free Trp increased only in those fed an 11% casein diet. Uremic rats fed 11% casein had a higher level of plasma free Trp than those fed 18% casein. The ratio of plasma total Trp to the sum of five amino acids competing for the blood-brain transport system was decreased in both uremic groups, and the ratio of plasma free Trp to the same amino acids was increased only in uremic rats fed 11% casein. The concentration of brain 5-HIAA increased in uremic rats fed 11% casein, and that of Trp and serotonin decreased in uremic rats fed 18% casein. These results indicate that uremic stress and changes in protein intake in chronic uremia alter plasma Trp levels and brain serotonin metabolism.
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3229
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Wang M, Kopple JD, Swendseid ME. Effects of arginine-devoid diets in chronically uremic rats. J Nutr 1977; 107:495-501. [PMID: 845686 DOI: 10.1093/jn/107.4.495] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
There is evidence that the kidney has a major role in the formation of the arginine used for extrahepatic protein synthesis. The effects of arginine-free diets were studied, therefore, in female Sprague-Dawley rats made uremic by partial left-renal artery ligation and contralateral nephrectomy. Uremic and sham-operated control rats were fed diets with amino acids proportioned as in casein or similar isonitrogenous diets in which the arginine was replaced by glutamic acid and alanine. Weight gain and the food efficiency ratio were determined, and 6 weeks after nephrectomy, a pulse dose of 14C-guanido arginine was administered. The rats were killed 2 hours later, and the radioactivity of proteins in various tissues was determined. Free arginine levels in tissues were also measured. Control rats fed diets devoid of arginine had reduced growth and a low food efficiency ratio. Free arginine levels in tissues and 14C-arginine incorporation into tissue protein in these rats were not different from controls receiving arginine except that 14C-incorporation into brain protein was decreased. Uremic rats fed an arginine-containing diet had a reduced growth rate as compared to control rats, and 14C-incorporation into brain protein was less. In uremic rats, when arginine was removed from the diet, there was no further effect on weight gain but the plasma arginine level was decreased and the incorporation of 14C-guanido arginine into protein of muscle and of kidney was reduced. Hence, the effects of an arginine-free diet appears to be different in chronically uremic as compared to control rats.
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3230
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Lai CY, Mendez E, Chang D, Wang M. Primary structure of cholera toxin B-subunit. Biochem Biophys Res Commun 1977; 74:215-22. [PMID: 836280 DOI: 10.1016/0006-291x(77)91396-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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3231
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Wang M, Vyhmeister I, Kopple JD, Swendseid ME. Effect of protein intake on weight gain and plasma amino acid levels in uremic rats. THE AMERICAN JOURNAL OF PHYSIOLOGY 1976; 230:1455-9. [PMID: 1275090 DOI: 10.1152/ajplegacy.1976.230.5.1455] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Chronically uremic rats weighing approximately 180-200 g and sham-operated controls of similar weight were pair fed diets containing 5, 15 or 23% protein for 10-12 wk. At each level of protein intake, uremic animals gained less weight and had lower protein efficiency ratios than controls. In addition, certain plasma amino acid levels were altered in the uremic animals. These included tyrosine and the tyrosine/phenylalanine ratio, which were decreased, and citrulline, glycine, and the methylhistidines, which were increased. In both uremic and control rats, plasma concentrations of certain amino acids, primarily nonessential ones, varied inversely with protein intake; with the 5% protein diet, the ratio of essential to nonessential amino acids was significantly reduced. These observations indicate that both uremia and reduced protein intake may affect growth and amino acid metabolism in rats with chronic renal failure. The finding that uremic rats utilize protein less efficiently may indicate that marked reductions in protein intake may be particularly hazardous to the nutritional status of the uremic patient.
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3233
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Swendseid ME, Wang M, Vyhmeister I, Chan W, Siassi F, Tam CF, Kopple JD. Amino acid metabolism in the chronically uremic rat. Clin Nephrol 1975; 3:240-6. [PMID: 237643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The chronically uremic rat has been used as a model to study amino acid metabolism in uremia. Uremic rats fed low protein diets (6% casein) survived longer than uremic rats receiving either higher levels of dietary protein or a low protein diet supplemented with a mixture of nonessential amino acids. Alterations in plasma amino acid levels were observed in the uremic rats and were similar to those found in patients with renal failure. Plasma concentrations of citrulline, free tryptophan, glycine and the methylhistidines were increased and levels of serine, ornithine, lysine, total tryptophan, tyrosine, and the tyrosine-phenylalanine ratio were reduced. The metabolic basis of the altered tyrosine-phenylalanine ratio in plasma was studied. Tyrosine aminotransferase (TAT) and phenylalanine hydroxylase (PHL) activity were normal in the liver, but renal PHL activity of was decreased as compared to control rats. Tissue concentrations of citrulline were also found to be raised in liver and muscle of uremic rats. The activity of ornithine transcarbamoylase, was reduced in the liver and arginine synthetase activity was decreased in the kidneys of uremic rats. Thus elevated citrulline levels in uremic tissue appear to be caused by a decrease conversion of citrulline to arginine in the kidney. Preliminary studies of tryptophan metabolism in uremic rats have shown elevated brain levels of 5-hydroxyindoleacetic acid and increased hepatic tryptophan oxygenase activity. Increased plasma amine levels were associated with altered activities of monoamine oxidase and diamine oxidase in kidney and other tissues.
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3234
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Swendseid ME, Wang M, Chan W, Kopple JD. The urea cycle in uremia. KIDNEY INTERNATIONAL. SUPPLEMENT 1975:280-4. [PMID: 1099310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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3235
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Tam CF, Kopple JD, Wang M, Swendseid ME. Alterations of monoamine oxidas activity in uremia. KIDNEY INTERNATIONAL. SUPPLEMENT 1975:328-32. [PMID: 1099313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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3236
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Chan W, Wang M, Kopple JD, Swendseid ME. Citrulline levels and urea cycle enzymes in uremic rats. J Nutr 1974; 104:678-83. [PMID: 4830270 DOI: 10.1093/jn/104.6.678] [Citation(s) in RCA: 44] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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3237
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Dirige OV, Jacob M, Wang M, Swendseid ME, Kopple JD. Transketolase activity in tissues of uremic rats. J Nutr 1973; 103:1723-6. [PMID: 4752975 DOI: 10.1093/jn/103.12.1723] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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3238
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Wang M, Fritchie CJ. Geometry of the unperturbed flavin nucleus. The crystal structure of 10-methylisoalloxazine. ACTA ACUST UNITED AC 1973. [DOI: 10.1107/s0567740873006096] [Citation(s) in RCA: 41] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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3239
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Imai K, Arizumi N, Wang M, Yoshiue S, Tamura Z. Gas chromatographic determination of 3,4-dihydroxyphenylalanine (DOPA) in urine. Chem Pharm Bull (Tokyo) 1972; 20:2436-9. [PMID: 4650151 DOI: 10.1248/cpb.20.2436] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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3240
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Kopple JD, Dirige OV, Jacob M, Wang M, Swendseid ME. Transketolase activity in red blood cells in chronic uremia. TRANSACTIONS - AMERICAN SOCIETY FOR ARTIFICIAL INTERNAL ORGANS 1972; 18:250-6, 266. [PMID: 4610963 DOI: 10.1097/00002480-197201000-00063] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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3241
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Abstract
Hyperimmune heterologous serum produced in sheep against mouse Ehrlich ascites tumour cells was absorbed with normal mouse tissue and fractionated by DEAE column chromatography into IgG1 and IgG2 fractions. In vitro cytotoxicity test showed that sheep anti-Ehrlich ascites tumour IgGl fraction was cytotoxic to (51)Cr labelled tumour cells whereas IgG2 had no cytotoxic effect. Pretreatment of the tumour cells with the non-cytotoxic IgG2 fraction slightly inhibited the cytotoxic action of IgG1 in vitro.When EAT cells were coated with either IgG1 or IgG2 by preincubation in vitro before injecting intraperitoneally into mice, both fractions protected the animals against tumour growth. Injection of IgG2 and IgGl fractions separately, one before and the other after the injection of EAT cells, resulted in partial protection only. The difference encountered between the in vitro and in vivo findings could be attributed to the host defence mechanisms involved in the in vivo test system.
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3242
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Allen C, Ardms F, Wang M, Bradley CC. Infrared-to-Millimeter, Broadband, Solid State Bolometer Detectors. APPLIED OPTICS 1969; 8:813-817. [PMID: 20072318 DOI: 10.1364/ao.8.000813] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Two versions of a thermal detector have been developed combining broadband response over the entire near infrared-to-millimeter region, room temperature operation, solid state construction, and amenability to absolute calibration. The sensitive detector version has a noise equivalent power (NEP) near 7 x 10(-10) W/Hz((1/2)) with a time constant of 6 msec. The power measuring bolometer version has a sensitivity near 10(-8) W for a 3-sec time constant. The basic construction uses a flake thermistor as a temperature sensor in combination with an optimized radiation absorber.
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Bandeira-Teixeira FM, Wang M, Ratliff CW, Stinson JC, LeBus HE. Clinicopathologic conference. Tex Med 1969; 65:69-74. [PMID: 5384656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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3244
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Wang M. Delayed hypersensitivity to extracts from primary sarcomata in the autochthonous host. Int J Cancer 1968; 3:483-90. [PMID: 5682443 DOI: 10.1002/ijc.2910030409] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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3245
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Wang M, Halliday WJ. Immune responses of mice to iodoacetate-treated Ehrlich ascites tumour cells. Br J Cancer 1967; 21:346-52. [PMID: 4165685 PMCID: PMC2008122 DOI: 10.1038/bjc.1967.39] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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3246
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Watkins J, Tee DE, Wang M, Tarlow O. Isolation and characterisation of mouse transferrins. BIOCHIMICA ET BIOPHYSICA ACTA 1966; 127:66-71. [PMID: 5970893 DOI: 10.1016/0304-4165(66)90476-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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3247
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Street JC, Wang M, Blau AD. Drug effects on dieldrin storage in rat tissue. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 1966; 1:6-15. [PMID: 24192784 DOI: 10.1007/bf01684070] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Selected drugs were tested for effectiveness in reducing dieldrin retention by rats. Female rats were fed diets treated to contain 1 ppm dieldrin. The drugs were administered as feed additives or by i.p. injections. The rats were sacrificed after 10 days of treatment and abdominal adipose tissue was analyzed for dieldrin using electron capture gas chromatography.Heptabarbital (40 and 225 mg/kg rat/day), aminopyrine (75 and 350 mg/kg rat/day), tolbutamide (60 and 290 mg/kg rat/day), and phenylbutazone (90 mg/kg rat/day) were effective as feed additives in reducing tissue dieldrin. Heptabarbital was the most effective and reduced the concentration of tissue dieldrin by 80 per cent at the higher dose level. In comparison, DDT (4 mg/kg rat/day) effected a 72 per cent reduction. A contrast with DDT was also observed in trials with i.p. administration of drugs and DDT. In those trials, the duration of the DDT action was apparently greater than that of the drugs.We suggest that suitable drugs might be used to reduce insecticide accumulation in the tissues of animals and man, and for treatment of individuals after over exposure to insecticides.
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Tee DE, Watkins J, Wang M, Gammack DB, Raper JH. Changes in mouse 7S gamma-globulin resulting from immunization with transplantable tumours. Immunology 1965; 9:85-92. [PMID: 5838980 PMCID: PMC1423556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The antibody response of A strain mice to immunization with C57BL mouse leukaemia, EL4, is confined to the 7S γ-globulin. A rapid chromatographic method has been developed for the isolation of mouse 7S γ-globulin in a high state of purity as judged by immunological and electrophoretic techniques. The apparent molecular weight (MSD) of the immune γ-globulin preparation did not differ significantly from that of the normal γ-globulin preparation. However, weight average (MW) and Z average (MZ) molecular weights determined from sedimentation equilibrium experiments showed differences in the two preparations. The MZ/MW ratios showed that the molecular polydispersity in the immune sample was significantly greater than that in the normal sample.
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