2276
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Abstract
Serum stimulates glucose uptake into several cells in culture. In intact muscle, an increase in cytosolic free Ca2+ has been proposed to mediate the activation of glucose uptake by hormones and other stimuli [Cell Calcium (1980) 1, 311-325]. We report that hexose (2-deoxy-D-glucose) uptake into L6 muscle cells in culture is enhanced several-fold by fetal calf serum. The increase in uptake is due to stimulation of transmembrane transport, since serum also stimulated uptake of the non-metabolizable hexose 3-O-methyl-D-glucose. The role of Ca2+ in this stimulation was assessed: (i) stimulation of transport by serum was independent of the presence of extracellular Ca2+ during the incubation with serum; (ii) the intracellular levels of free Ca2+, measured by the fluorescence of the novel Ca-indicator quin-2, were identical in serum-stimulated and control cells. It is concluded that hexose transport can increase in muscle cells without concomitant changes in cytoplasmic free Ca2+.
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2277
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Li G, Yang BN, Zheng SY, Zhang BC, Zhou XZ, Zhao LS. Study of freezing lethality in normal and tumor cells. Chin Med J (Engl) 1983; 96:686-90. [PMID: 6418467] [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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2278
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Klip A, Li G, Walker D. Insulin binding to differentiating muscle cells in culture. CANADIAN JOURNAL OF BIOCHEMISTRY AND CELL BIOLOGY = REVUE CANADIENNE DE BIOCHIMIE ET BIOLOGIE CELLULAIRE 1983; 61:644-9. [PMID: 6354398 DOI: 10.1139/o83-081] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Saturable binding of 125I-labelled insulin was detected on L6 myoblasts grown in monolayers. Binding was proportional to the number of cells and was pH sensitive, decreasing above pH 7.0. Binding also decreased with increasing temperature in the range 22-37 degrees C. Binding of insulin over a range of hormone concentrations (10(-10)-10(-6) M) was analyzed by Scatchard plots. The data are compatible with the coexistence of two components with Kd of 3 and 190 nM. The number of both types of binding sites increased with cell differentiation (upon alignment and cell fusion), when expressed either per unit protein, DNA, or surface membrane cholesterol. On the other hand, their association constants did not vary. Binding of insulin to a nonfusing mutant of L6 cells resembled binding to the parent myoblasts before alignment.
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2279
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Li G, Gao X, Zhang C, Liao Z, Lin Z, Yue S, Liu Y. [Microscopic observation of the adherence of Streptococcus mutans]. SICHUAN YI XUE YUAN XUE BAO = ACTA ACADEMIAE MEDICINAE SICHUAN 1983; 14:57-61. [PMID: 6573028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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2280
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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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2281
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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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2282
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Li G. [The relationship between the life table method and the formula for calculating life expectancy]. REN KOU YAN JIU = RENKOU YANJIU 1982:32-7. [PMID: 12312489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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2283
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Zeng JK, Wang TY, Luo YX, Li G. Cemented double cup arthroplasty of the hip: experimental design and clinical application. ACTA ACADEMIAE MEDICINAE WUHAN = WU-HAN I HSUEH YUAN HSUEH PAO 1982; 2:155-61. [PMID: 7167265 DOI: 10.1007/bf02858450] [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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2284
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Klip A, Logan WJ, Li G. Hexose transport in L6 muscle cells. Kinetic properties and the number of [3H]cytochalasin B binding sites. BIOCHIMICA ET BIOPHYSICA ACTA 1982; 687:265-80. [PMID: 7093257 DOI: 10.1016/0005-2736(82)90555-7] [Citation(s) in RCA: 74] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
(1) Myoblasts in culture (L6 cell line) were used as an in vitro model system, to study the kinetic and pharmacological properties of hexose transport in skeletal muscle tissue. (2) Uptake of 2-deoxy-D-[3H]glucose into L6 cells grown in monolayer culture was judged rate limiting since: (2) The time course of sugar uptake extrapolated to zero, (b) a parallel inhibition of hexose uptake and phosphorylation was caused by cytochalasin B, and (c) very little backflow of the hexose was detected. (3) Uptake of 2-deoxy-D-[3H]glucose by cells in monolayers was linear for at least 20 min and it was stimulated by countertransport. The Kt value was 0.83 mM. Cytochalasin B inhibited uptake non-competitively, and half maximal inhibition was achieved at 0.3 microM. Cytochalasin E (up to 5 microM) did not affect 2-deoxy-D-[3H]glucose uptake. (4) L6 myoblasts, detached by trypsinization, retained the hexose transport activity. Kt in detached cells was 0.96 mM. V was 3.2 nmol/min per mg protein, and half maximal inhibition was observed with 0.25 microM cytochalasin B. (5) [3H]Cytochalasin B binding to detached cells showed saturable and non-saturable components. The former could be further separated into cytochalasin E-sensitive binding (probably associated to cytoskeletal proteins) and cytochalasin E-insensitive binding, a fraction of which was inhibited by D-glucose. The D-glucose sensitive sites amount to 16.3 pmol/mg protein, and showed a Kd of 0.49 microM, which is in close agreement with the Ki of cytochalasin B inhibition of hexose uptake. These sites probably are equivalent to the hexose carrier molecules, and are present at a density of 6.8 . 10(6) sites/cell.
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2285
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Smith B, Li G, Sembrowlch WL. THE EFFECTS OF ENDURANCE TRAINING ON CALCIUM TRANSPORT BY MITOCHONDRIA FROM RAT SKELETAL MUSCLE FIBER TYPES. Med Sci Sports Exerc 1982. [DOI: 10.1249/00005768-198202000-00191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2286
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Sembrowich WL, Li G. CA++ RELEASE FROM CARDIAC MUSCLE MITOCHONDRIA. Med Sci Sports Exerc 1981. [DOI: 10.1249/00005768-198101320-00247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2287
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Ouintinskie JJ, Li G, Sembrowich WL. THE ROLE OF ATP IN CA++ UPTAKE BY CARDIAC MUSCLE MITOCHONDRIA IN VITRO. Med Sci Sports Exerc 1981. [DOI: 10.1249/00005768-198101320-00241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2288
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Li G. [Epidemiologic survey of Tsutsugamushi disease: analysis of 46 cases (author's transl)]. ZHONGHUA YU FANG YI XUE ZA ZHI [CHINESE JOURNAL OF PREVENTIVE MEDICINE] 1980; 14:43-5. [PMID: 7227083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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2289
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Yu YZ, Liu ZY, Li TL, Jin SX, Lu YF, Deng XX, Cai YN, Liao WI, Yan YZ, Yun JT, Li G, Lu Y, Wang FJ, Liang Y, Li JX, Lu WM. [The manufacture and efficiency test of the supplimental oxygen equipment for individuals working at high altitude (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:259-64. [PMID: 233305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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2290
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Cheng XS, Li G, Mu ZY, Jin SX. [The clinical investigation of influences on healthy subjects at various altitudes and different intensity of labour (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:211-2. [PMID: 552917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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2291
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Cheng XS, Cai YN, Yun JT, Li G, Li JX, Liao DH. [Types and diagnostic criteria of right ventricular hypertrophy at high altitudes (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:238-42. [PMID: 162230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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2292
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Cheng XS, Wang Q, Yan YZ, Wu MX, Li G, Li JX. [The dynamic observation of electrocardiograms at varios altitudes on the workers of a certain unit (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:243-7. [PMID: 552920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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2293
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Xu LN, Wang Q, Wu MX, Li G. [A comparison of compositus yiqi huoxue. Huang Qi (Astragalus monogholicus Bunge) and daidzein on acute mountain sickness (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:274-7. [PMID: 552925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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2294
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Cheng XS, Cai YN, Yun JT, Li G, Li JX, Liao DH. [Incomplete right bundle branch block at high altitudes (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:235-7. [PMID: 162229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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2295
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Yu YZ, Li TL, Liu ZY, Wang Q, Deng XX, Wu MX, Li G, Li LS, Liang Y, Cheng KR, Guo ML, Hu WS. [A study on the problem of labour hygiene and labour protection at high altitude (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:248-55. [PMID: 162231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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2296
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Cai YN, Sun P, Chen XS, Zhang GZ, Li G. [A study of pulmonary rheography determinating pulmonary circulation and right cardiac function (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:173-8. [PMID: 552911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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2297
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Cheng XS, Cai YN, Yun JT, Li G, Li JX, Liao DH. [Left axis deviation and SI SII SIII pattern at high altitudes (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:228-34. [PMID: 162228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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2298
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Deng XX, Cheng XS, Liang Y, Li G, Zhang GZ. [Indirect method for determining the systolic pressure in the pulmonary artery by echocardiography (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:186-90. [PMID: 552913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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2299
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Cheng XS, Cai YN, Yun JT, Li G, Li JX, Liao DH. [The influence of various altitudes and different intensity of labour on the electrical activity of the heart (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:216-27. [PMID: 552919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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2300
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Deng XX, Cheng XS, Cai YN, Yun JT, Li G, Liang Y, Li JX, Liao DH. [Influence of high altitude environment on heart (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:35-9. [PMID: 262810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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