376
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Chen TC, Leviton A, Edelstein S, Ellenberg JH. Migraine and other diseases in women of reproductive age. The influence of smoking on observed associations. ARCHIVES OF NEUROLOGY 1987; 44:1024-8. [PMID: 3632373 DOI: 10.1001/archneur.1987.00520220030011] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
From among the pregnant women in the Collaborative Perinatal Project of the National Institute of Neurological and Communicative Disorders and Stroke, we identified 508 who had migraine, and 3192 who had no history of migraine, of taking headache medication during the previous 12 months, and of headaches during the pregnancy. Migraineurs smoked more heavily and had a longer smoking history than their headache-free peers. Among migraineurs, smokers were not more likely to consume analgesics than nonsmokers. Regardless of smoking classification, more migraineurs consumed tranquilizers, amphetamines, and sleeping pills than headache-free women. Among smokers only, migraine was associated with heart disease, thrombosis/phlebitis, asthma, peptic ulcer, and pneumonia. In nonsmokers, migraine was associated with drug sensitivity and other allergies.
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377
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Chan FY, Chen TC, Leu FJ, Tseng HH, Tu YC. [Gastric polyps: a study in 121 cases diagnosed by endoscopy and biopsy]. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1987; 86:978-84. [PMID: 3694169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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378
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Kuo JS, Huang SK, Chen TC. [Evaluation of the effect of Scotchbond and three other dentin adhesives on microleakage]. CHANGGENG YI XUE ZA ZHI 1987; 10:44-50. [PMID: 3331956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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379
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Chen TC, Humpierres J, Hanna D, Perregaux SB, Puschett JB. Volume expansion-induced changes in renal tubular membrane protein phosphorylation. Biochem Biophys Res Commun 1987; 143:74-80. [PMID: 3827931 DOI: 10.1016/0006-291x(87)90631-0] [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: 01/07/2023]
Abstract
The influence of volume expansion (VE) on the in vitro phosphorylation of membrane protein in the proximal brush border membrane (BBM) of the thyroparathyroidectomized (TPTX) rat was studied in the presence and absence of cyclic AMP and the results were compared to those obtained in control TPTX and intact animals. The results indicate that the cyclic AMP-independent phosphorylation of a protein band (Mr = 72,000) was stimulated both by VE and by the presence of parathyroid hormone in the circulation, whereas the cyclic AMP-dependent phosphorylation of membrane proteins (Mr = 40,000, 52,000 and 87,000) was inhibited by the same maneuvers. These findings, taken together with data previously available, which demonstrate inhibition of BBM phosphate transport following VE, may provide a link between alterations in phosphate transport in renal BBM vesicles and the phosphorylation of membrane proteins. The results further suggest that membrane protein phosphorylation may be a common mechanism by which a number of agents and maneuvers induce an inhibition of renal tubular phosphate transport.
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380
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Chen TC, Kuo JS. [Evaluation of the relation of distal surface caries of the mandibular second molar with the mandibular third molar]. CHANGGENG YI XUE ZA ZHI 1986; 9:186-93. [PMID: 3454710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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381
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Badimon JJ, Kottke BA, Chen TC, Chan L, Mao SJ. Quantification and immunolocalization of apolipoprotein E in experimental atherosclerosis. Atherosclerosis 1986; 61:57-66. [PMID: 3730054 DOI: 10.1016/0021-9150(86)90113-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We developed a radioimmunoassay for rabbit apolipoprotein E (apo E) for studying their plasma apo E levels and its accumulation in the aorta of rabbits fed a cholesterol diet. Delipidation of plasma did not increase the apo E immunoreactivity and this immunoreactivity was indistinguishable from that in an apo E-phospholipid complex. The antigenic determinants of apo E in lipoprotein particles were therefore fully reacted with our goat anti-apo E antibodies. In our assay system, the non-ionic detergent Tween-20 was found to be necessary to significantly reduce the non-specific binding of 125I-labeled apo E to polystyrene tubes, and yet not interfere with the assay. In rabbits (n = 6) fed a high cholesterol (1%) diet, plasma apo E increased at least 10-fold above baseline levels and reached maximal levels within 17-20 days after the onset of cho-diet feeding. These levels were sharply reduced only 10 days after resuming a normal diet. Plasma total cholesterol levels went through a similar pattern. Thus, the plasma cholesterol concentration can simply be used to monitor the increase of apo E in cholesterol-fed rabbits. All the cholesterol-fed rabbits developed atherosclerotic fatty streak lesions and apo E located mostly in the thoracic region and was significantly correlated with the accumulation of lipids in the areas of lesion. In addition, the apo E deposition was limited to the aortic areas where lipids were present. On the other hand, apo A-I was not detectable in any lesion area. Our data suggest that apo E or apo E-containing lipoproteins, may be involved in the development of atherosclerosis in cholesterol-fed rabbits.
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382
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Chen TC. [Studies on a new technic for performing end colostomy using an auto suture]. IGAKU KENKYU. ACTA MEDICA 1985; 55:103-7. [PMID: 3907244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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383
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Chen KH, Cann H, Chen TC, Van West B, Cavalli-Sforza L. Genetic markers of an aboriginal Taiwanese population. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 1985; 66:327-37. [PMID: 3857010 DOI: 10.1002/ajpa.1330660310] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A group of Taiwan aborigines, the Toroko, was typed for 21 classical genetic loci. This is part of an ongoing program aimed at a comprehensive study of Taiwan aborigines. In this first paper a short summary of historical, archeological, and anthropological data in the literature is made, and results of the present survey are compared with older results from other aborigine tribes. An analysis of other neighboring populations from southeast Asia has also been carried out in order to give a preliminary answer to the question of origin of Taiwanese aborigines. Fifteen populations were studied for 13 loci by tree analysis, principal components, and isolation by distance. Tree analysis and principal component analysis gave results in fairly good agreement and indicate three major population clusters: a northeast cluster (Ainu, Korea, Japan, and Ryukyu); a southeast cluster (south China, Thailand, Vietnam, Philippines, Taiwan, and Toroko); and a third cluster including Malaya and Borneo. The positions of Polynesia, Micronesia, and Melanesia are somewhat peripheral. Analysis of the tree shows some potential cases of convergence, perhaps owing to admixture, and of divergence. The analysis of isolation by distance shows that geographic propinquity is a reasonably good predictor of general similarity in this area.
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384
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Chang FY, Chen TC, Lee SK. Real-time ultrasonography in the diagnosis of pancreatic tumors. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1985; 84:204-11. [PMID: 3891910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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385
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Chen TC, Mullen JP, Meglin NJ. Modulation of 1,25-dihydroxyvitamin D3 receptor by phospholipids and fatty acids. J Lipid Res 1984; 25:1306-12. [PMID: 6099395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The structural relationship between several lipids and their respective capacities to inhibit the specific binding of [3H]-1,25 (OH)2 vitamin D3 to chick intestinal cytosol preparations was investigated. The lipids investigated were: synthetic 3-sn-phosphatidylcholine and 3-sn-phosphatidic acid, egg yolk 3-sn-phosphatidylcholine and its corresponding phosphatidic acid, and free unsaturated fatty acids and their esters. The results indicate that at least three structural elements in the phospholipid molecule appear to be important; these are: 1) the structure of the fatty acid, 2) the anionic properties of the phospholipid phosphate group, and 3) the glycerol phosphate portion of the molecule. Our data also demonstrate that the position (1 or 2) and the amount (single vs. double) of unsaturated fatty acids in the phospholipid molecule do not play a major role in the receptor-1,25 (OH)2 vitamin D3 interaction. Furthermore, under equilibrium conditions, kinetic and Scatchard analysis suggest that phospholipids or free fatty acids may bind at a site different from the 1,25 (OH)2 vitamin D3 binding site, and therefore inhibit the hormone binding via a noncompetitive conformational change in the receptor molecule. A model for this phospholipid/free fatty acid binding site is proposed.
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386
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Dominguez JH, Pitts TO, Brown T, Puschett DB, Schuler F, Chen TC, Puschett JB. Prostaglandin E2 and parathyroid hormone: comparisons of their actions on the rabbit proximal tubule. Kidney Int 1984; 26:404-10. [PMID: 6597316 DOI: 10.1038/ki.1984.189] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Recent studies demonstrated that prostaglandin E2 (PGE2) participates in the regulation of glomerular and distal tubular function. A functional role for PGE2 on the proximal tubule has only recently been explored. Thus, we reported that PGE2 antagonizes the phosphaturic effect of PTH in the dog, which suggests that PGE2 may influence the transport functions of the mammalian proximal tubule. The present studies were designed to examine the direct effect of parathyroid hormone (PTH) and PGE2 on the fluxes of fluid (Jv) and phosphate (Jl-b PO4) in the rabbit proximal convoluted and straight tubules (PCT and PST). The activation of adenylate cyclase by the two agents was also examined. Finally, the combined effects of PTH and PGE2 on Jv and Jl-b PO4 were also studied in the PST. In the PCT, PTH (1 microgram/ml) inhibited Jv by 31% (P less than 0.05) but did not alter Jl-b PO4. PGE2 (10(-5) M) failed to act on either Jv or Jl-b PO4. In this segment, PTH stimulated adenylate cyclase but PGE2 did not. In the PST, PTH (1 microgram/ml) inhibited Jv and Jl-b PO4 by 34 and 20%, respectively (P less than 0.01). PGE2 (10(-5) M) also inhibited Jv and Jl-b PO4, by 33 and 12%, respectively (P less than 0.02). In contrast, PGF2 alpha, a related prostanoid, failed to influence these transport parameters. In the PST, PTH activated adenylate cyclase but PGE2 failed to do so. When both PTH (1 microgram/ml) and PGE2 (10(-7) M) were present simultaneously, Jv and Jl-b PO4 were comparable to that seen during control collections.(ABSTRACT TRUNCATED AT 250 WORDS)
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387
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Chang FY, Wang WB, Chen TC. Serum alpha-fetoprotein in nonneoplastic liver diseases. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1984; 83:765-72. [PMID: 6084045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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388
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Chang FY, Wang WB, Chen TC, Fong MS, Ma HW, Tu YC. [Arteriovenous malformation of stomach--a case report]. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1983; 82:476-80. [PMID: 6604131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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389
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Chen TC, De Figueiredo RJ. An image transform coding scheme based on spatial domain considerations. IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE 1983; 5:332-337. [PMID: 21869116 DOI: 10.1109/tpami.1983.4767395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Image transform coding is first briefly reviewed using conventional viewpoints. Then a new spatial domain interpretation is given to image transform coding. An improvement based on this viewpoint for the Fourier transform coding, which possesses simple spatial domain relations, is presented.
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390
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McGowan JA, Chen TC, Fragola J, Puschett JB, Rosenblatt M. Parathyroid hormone: effects of the 3-34 fragment in vivo and vitro. Science 1983; 219:67-9. [PMID: 6849118 DOI: 10.1126/science.6849118] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The biologically active fragment ofparathyroid hormone, consisting of residues 1-34, and its in vitro antagonist, fragment 3-34, were administered separately or in combination to chronically thyroparathyroidectomized dogs. These fragments were also studied in vitro with dog renal cortical membranes. Fragment 3-34 inhibited the stimulation of adenylate cyclase by fragment 1-34 in vitro, but had no agonist or antagonistic effects on renal phosphate transport in vivo.
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391
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Winaver J, Fragola J, Chen TC, Sylk DB, Robertson JS, Puschett JB. Potentiation by calcium of the proximal tubular transport effects of parathyroid hormone. MINERAL AND ELECTROLYTE METABOLISM 1982; 8:275-88. [PMID: 6300634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Previous studies from this laboratory have demonstrated that a low ('physiological') dose of parathyroid hormone (PTH) effects a phosphaturia in chronically thyroparathyroidectomized (TPTX), hypocalcemic dogs, similar in magnitude to that seen in normal intact animals, without altering proximal tubular reabsorption. In addition, cyclic AMP did not increase following this amount of PTH, despite the phosphaturia. Since calcium is an important modulator of transport events, we studied the effects of restoring serum calcium (Ca) to normal before administering a physiological dose of PTH (0.3-0.5 U/kg). In hypocalcemic dogs given only physiological amounts of PTH, percentage phosphate excretion (%EPO4) rose from 3.81 +/- 1.48 to 18.29 +/- 5.69% (p less than 0.025) without any alteration in proximal tubular function. Ca infusion alone likewise did not change %EPO4 or proximal tubular transport. However, calcium-infused dogs given a physiological dose of PTH showed a reduction in proximal tubular fractional phosphate reabsorption from 0.73 +/- 0.04 to 0.63 +/- 0.04 (p less than 0.005), as well as an increase in %EPO4 (from 5.64 +/- 1.69 to 15.86 +/- 2.82%, p less than 0.001), without any increase in urinary or tissue cyclic AMP. We conclude that the elevation of the serum Ca to normal restores the ability of PTH in physiological amounts to alter proximal tubular PO4 transport. The data also suggest that this action of PTH is mediated by Ca, rather than by the adenylate cyclase system.
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392
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Chang FY, Chen CF, Chen TC, Fong MS. [Primary small intestinal malignancies]. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1982; 81:1056-61. [PMID: 6960134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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393
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Winaver J, Chen TC, Fragola J, Robertson G, Slatopolsky E, Puschett JB. Alterations in renal tubular water transport induced by parathyroid hormone: evidence for both antidiuretic hormone-mediated and independent effects. THE JOURNAL OF LABORATORY AND CLINICAL MEDICINE 1982; 99:457-73. [PMID: 6278038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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394
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Abstract
This paper deals with occupational exposure in the academic sector of the Republic of China during the past two decades. The Tsing-Hua film badges were used for personnel monitoring. The radiation sources available in the research institutes and universities are listed and illustrated. The number, sex, age and per capita dose equivalent for the radiation workers in the past 21 yr are analyzed. The radioisotope production rate and the dose equivalent received by the workers are compared, and the results indicate that radiation protection has been greatly improved during last decade.
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395
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Chang FY, Chen TC, Fong MS, Lin S, Yeh SH. Alphafetoprotein levels measured by radioimmunoassay in various liver malignancies. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1982; 81:224-31. [PMID: 6178794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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396
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Puschett JB, McGowan J, Fragola J, Chen TC, Rosenblatt M, Keutmann H. Difference in renal tubular transport effects of 1-34 and 1-84 parathyroid hormone (PTH). ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1982; 151:81-2. [PMID: 7180673 DOI: 10.1007/978-1-4684-4259-5_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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397
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Weber MA, Drayer JI, Priest RT, Chen TC. Participation of the renin system in treatment-resistant hypertension as measured by acute blockade of the angiotensin converting enzyme. Am J Nephrol 1982; 2:6-11. [PMID: 6295161 DOI: 10.1159/000166575] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The acute blood pressure response to the angiotensin converting enzyme inhibitor, captopril, was used to measure participation of the renin-angiotensin system in treatment-resistant hypertension. By 2 h after a single 25-mg oral captopril dose in patients still receiving a diuretic-vasodilator-beta-blocker combination, systolic and diastolic blood pressures had fallen significantly; the decrease in diastolic pressure correlated with the control (immediately pre-captopril) plasma renin activity (r = 0.64, p less than 0.001). Apart from its possible contribution to the underlying hypertension, this captopril-identified renin component may have reflected diuretic and vasodilator-induced renin stimulation that could not adequately be prevented by the renin-lowering properties of the beta-blocker. Captopril, and perhaps other specific antirenin drugs, therefore, may be valuable adjuncts to treatment in patients with hypertension refractory to conventional therapy.
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398
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Chen TC, Puschett JB. Modulation of parathyroid hormone-sensitive adenylate cyclase and arginine vasopressin-sensitive adenylate cyclase by calcium and GTP. Arch Biochem Biophys 1981; 212:660-7. [PMID: 6798940 DOI: 10.1016/0003-9861(81)90410-0] [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: 01/21/2023]
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399
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Dominguez JH, Chen TC, Fragola J, Puschett JB. Inhibition of the renal tubular effects of parathyroid hormone on phosphate transport by prostaglandin E2. Endocrinology 1981; 109:2267-9. [PMID: 6946926 DOI: 10.1210/endo-109-6-2267] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The infusion of PGE2 into TPTX dogs abolishes the phosphaturic action of PTH in vivo. This effect occurs only if PGE2 infusion precedes the administration of PTH. The infusion of PGE2 in vivo induces a state of refractoriness of PTH-sensitive adenylate cyclase in renal middle medulla from TPTX dogs in vitro. These results suggest that PGE2 inhibits the biological effects of PTH, in part by altering the events related to PTH activation of renal adenylate cyclase. These effects of PGE2, a local mediator, suggest that the renal tubular cell may modulate its responses to multiple and antagonistic stimuli by altering local renal prostaglandins.
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400
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Chen TC, Puschett JB. Evidence for an endogenous parathyroid hormone-sensitive adenylate cyclase activator. Biochem Biophys Res Commun 1981; 100:1471-6. [PMID: 7295311 DOI: 10.1016/0006-291x(81)90684-7] [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: 01/24/2023]
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