4001
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Lukes J, Schrader P, Anastasia L, Mueller H, Rao P, Dutta D, Yang J, Bain R. 35 Histologic quantitation of infarct size to assess accuracy of estimative creatine phosphokinase formulas. Clin Biochem 1979. [DOI: 10.1016/s0009-9120(79)80046-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4002
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Enami J, Yang J, Nandi S. Simultaneous production of casein and mammary tumor virus in mouse mammary epithelial cells grown on floating collagen gels. Cancer Lett 1979; 6:99-105. [PMID: 219954 DOI: 10.1016/s0304-3835(79)80007-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Simultaneous production of casein and mammary tumor virus (MTV) was analyzed in monolayer cultures of mammary epithelial cells from pregnant BALB/cfC3H mice. A comparison of the 2 cell culture substrata, plastic culture dish and floating collagen gel, showed that the latter supported a much higher degree of simultaneous casein and MTV production in the presence of insulin, cortisol and prolactin in serum-free culture medium. Importance of floating collagen gel was further shown by delaying the flotation of gels. When the release of gels was delayed, there were concomitant delays in the increase of casein and MTV production. These results indicate that hormones, nature of substratum and flotation regulate the degree of differentiation of mammary epithelial cells in vitro.
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4003
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Murai JT, Conner E, Yang J, Andersson M, Berliner J, Gerschenson LE. Hormonal regulation of cultured rabbit endometrial cells. J Toxicol Environ Health 1978; 4:449-56. [PMID: 207881 DOI: 10.1080/15287397809529670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A technique for culturing primary explants of rabbit endometrial cells in chemically defined medium has been developed. Diethylstilbestrol and natural estrogens were found to increase the rate of DNA initiation while progesterone had the opposite effect. Ultrastructural studies revealed that with estrogens, the cultures had the appearance of rapidly dividing cells having large euchromatic nuclei and prominent nucleoli, with aboundant free ribosomes in the cytoplasm. On the other hand, progesterone induced the formation of large multinucleated cells and also converted the cells to a more secretory type. When the cultures appear secretory, a protein called blastokinin (uteroglobin) is believed secreted. We have found that cultured cells synthesize blastokinin and progesterone is necessary for its continuous synthesis. The cultures were found to have receptors for the ovarian hormones and these receptors exhibited saturation kinetics. The dissociation constants for the receptors were also determined. A hypothetical model for the hormonal regulation of cell proliferation and differentiation is proposed.
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4004
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Yang J, Enami J, Nandi S. Regulation of mammary tumor virus production by prolactin in BALB/cfC3H mouse normal mammary epithelial cells in vitro. Cancer Res 1977; 37:3644-7. [PMID: 198118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hormonal regulation of mammary tumor virus (MTV) production, has been analyzed with normal mammary epithelial cells from chronically infected BALB/cfC3H mice. The effect of prolactin in terms of increased MTV production was not reproducibly observed in cells cultured in tissue culture dishes, whereas the cells grown on floating collagen gels consistently responded to prolactin in a dose-dependent manner. Of the three media tested. Dulbecco's modified Eagle's medium was found to be the best in terms of responsiveness to prolactin and in maximal MTV production. Specificity studies with other pituitary and placental hormones in place of prolactin have shown that both growth hormones and human placental lactogen can replace prolactin, whereas follicle-stimulating hormone, luteinizing hormone, and thyrotrophin were ineffective. Contrary to the mammary tumor systems, where it has been shown that insulin and glucocorticoid can maximally stimulate MTV production, these hormones alone elicited only a small response in the absence of prolactin in normal mammary epithelial cells. Although prolactin alone had very little effect by itself, its presence was necessary (permissive effect) in order for the glucocorticoids to be able to maximally stimulate MTV production in normal cells.
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4005
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Yang J. [When I was a patient]. Hu Li Za Zhi 1977; 24:101-2. [PMID: 246897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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4006
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Yang J, Tang R, Nandi S. Identification of the mammary tumor virus envelope glycoprotein (gp52) on mouse mammary epithelial cell surface. Biochem Biophys Res Commun 1977; 76:1044-50. [PMID: 71144 DOI: 10.1016/0006-291x(77)90961-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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4007
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Sholten T, Yang J, Palmer J. Parasitism in an Ontario mental institution: preliminary report. Can Med Assoc J 1977; 116:1114, 1118. [PMID: 861858 PMCID: PMC1879492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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4008
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Yang J, Scholten T. A fixative for intestinal parasites permitting the use of concentration and permanent staining procedures. Am J Clin Pathol 1977; 67:300-4. [PMID: 65913 DOI: 10.1093/ajcp/67.3.300] [Citation(s) in RCA: 85] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Results obtained with stools preserved in a simple, stable and relatively nontoxic fixative (SAF) composed of sodium acetate, acetic acid and formalin, suggest that this fixative is a suitable alternative to other fixatives for the preservation and recovery of intestinal parasites by diphasic concentration methods and permanent staining.
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4009
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Abstract
Addition of dibutyryl cyclic AMP (cAMP) and agents (isoproterenol and epinephrine) that stimulate the activities of adenylate cyclase enhance the stimulation of mammary tumor virus (MTV) production two- to threefold by glucocorticoid in short-term primary cultures of mammary tumors. This cAMP potentiation seems to depend on the stimulated level of MTV production by glucocorticoid alone, which increases MTV production 5- to 10-fold over basal level but varies greatly in absolute terms. When the stimulated level by glucocorticoid alone is suboptimal, cAMP seems to restore the sensitivity of the cells to the stimulatory effect of glucocorticoid to its maximum.
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4010
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Yang J, Scholten T. Dientamoeba fragilis: a review with notes on its epidemiology, pathogenicity, mode of transmission, and diagnosis. Am J Trop Med Hyg 1977; 26:16-22. [PMID: 842778 DOI: 10.4269/ajtmh.1977.26.16] [Citation(s) in RCA: 65] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Dientamoeba fragilis was found in 4.2% of approximately 43,000 individuals who submitted stools for parasitological examination during 1970 to 1974. The parasite was more frequently found in the younger age group (less than 20 years) than in older age groups, and more often in females than in males. Symptoms in 255 of patients in whom D. fragilis was the only parasite found and for whom detailed symptoms had been supplied, included: diarrhea, abdominal pains, anal pruritus, and loose stools. Analysis of mixed infections of D. fragilis with intestinal helminths suggests that such infections are random except for the combination of D. fragilis and Enterobius vermicularis. This combination occurred 9 times more often than theoretically expected. Daily periodicity and distribution of D. fragilis within stools of one patient were studied over a period of 6 months. More than twice as many organisms per ml of stool were present in the last than in the first portion evacuated. The total number of organisms excreted fluctuated markedly from day to day.
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4011
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Dauben W, Rivers G, Zimmerman W, Yang N, Kim B, Yang J. The role of tosylhydrazone stereochemistry upon the regiospecificity of olefin formation. Tetrahedron Lett 1976. [DOI: 10.1016/s0040-4039(01)85497-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4012
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Abstract
The use of an iron alum lake of celestine blue B in acetic acid as an alternative to hematoxylin in the routine staining of fecal smears and tissue sections for Protozoa is presented.
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Affiliation(s)
- J Yang
- Parasitology Laboratory, Laboratory Services Branch, Ontario Ministry of Health, Toronto, Ontario, Canada
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4013
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Tierney DF, Yang J, Ayers L. Enzymatic activity in rat lungs. Some changes with exposure to 1 ATM oxygen. Chest 1975; 67:40S-42S. [PMID: 234362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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4014
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4015
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Gerschenson LE, Berliner J, Yang J. Diethylstilbestrol and progesterone regulation of cultured rabbit endometrial cell growth. Cancer Res 1974; 34:2873-80. [PMID: 4420927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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4016
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Scholten TH, Yang J. Evaluation of unpreserved and preserved stools for the detection and identification of intestinal parasites. Am J Clin Pathol 1974; 62:563-7. [PMID: 4413322 DOI: 10.1093/ajcp/62.4.563] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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4017
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Tierney D, Ayers L, Herzog S, Yang J. Pentose pathway and production of reduced nicotinamide adenine dinucleotide phosphate. A mechanism that may protect lungs from oxidants. Am Rev Respir Dis 1973; 108:1348-51. [PMID: 4356452 DOI: 10.1164/arrd.1973.108.6.1348] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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4018
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Shah-Mirany J, Najafi H, Serry C, Callaghan R, Yang J. Pathophysiological alterations in perfused and nonperfused lungs during cardiopulmonary bypass. Ann Thorac Surg 1970; 10:402-8. [PMID: 5476228 DOI: 10.1016/s0003-4975(10)65368-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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4019
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Seel DJ, Yang J, Lee KY. Inflammatory hemobilia. Surgery 1969; 66:821-9. [PMID: 5307560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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4020
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Bather R, Yang J. Myo-inositol influences release and inactivation of murine sarcoma virus from desiccated transformed mouse embryo cells. Nature 1969; 222:589. [PMID: 5812421 DOI: 10.1038/222589a0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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4021
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Yang J. [The frustration-fixation hypothesis; an attempt to test it on an experimental basis]. Ned Tijdschr Psychol 1968; 23:381-93. [PMID: 5680157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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4022
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Bather R, Leonard A, Yang J. Characteristics of the in vitro assay of murine sarcoma virus (Moloney) and virus-infected cells. J Natl Cancer Inst 1968; 40:551-60. [PMID: 4296210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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4023
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Abstract
1. Canine pancreas slices were incubated with [6-(14)C]orotic acid and the rate of its incorporation into RNA was measured. RNA was fractionated by shaking homogenates with phenol at 2 degrees , 50 degrees , 65 degrees and 80 degrees . Cytoplasmic RNA was extracted at the lowest temperature and nuclear RNA at the higher temperatures. The samples were centrifuged through sucrose gradients and the E(260) and (14)C-sedimentation patterns determined. Incorporation of orotic acid was very rapid into cytoplasmic 4s RNA. This probably represents end-group turnover. No incorporation into cytoplasmic ribosomal RNA was observed. 2. The nuclear 50 degrees -RNA exhibited two E(260) peaks, at 18s and 28s. This portion of the sample contained but moderate amounts of [(14)C]RNA. The highly labelled material had sedimentation coefficients in the range 35-50s. The nuclear 65 degrees -RNA showed an E(260) peak at 16s. The [(14)C]RNA peak occurred at 25-35s and this portion demonstrated the highest specific activity of any RNA fraction. 3. The 50 degrees -RNA, 65 degrees -RNA and 80 degrees -RNA were hydrolysed and their base compositions were determined. All three samples possess a ribosomal type of composition (G+C)/(A+U)=(1.4-1.7). For this reason they are considered to contain ribosomal precursor RNA as their major constituent. 4. Actinomycin D (0.5mug./ml.) in the incubation medium inhibited incorporation of orotic acid into both nuclear fractions but not into 4s RNA. 5. The cholinergic drug Urecholine inhibited incorporation into the heavy, high-specific-activity portions of the nuclear fractions but did not inhibit incorporation into the ribosomal precursor type of nuclear RNA. A similar result was also obtained with the hormone pancreozymin. Moderate inhibition of incorporation of orotic acid into 4s RNA likewise resulted from the presence of the drug and the hormone.
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4024
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Cheng YS, Li HT, Yang J. [A comparison of the destructive effects of five antitumour agents on various normal tissues in mice]. Yao Xue Xue Bao 1965; 12:606-14. [PMID: 5899044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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