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Zhao Y, Xue SB, Tian X, Feng GD, Gao ZQ. [A sampling survey of intraoperative facial nerve monitoring in China]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2024; 59:122-126. [PMID: 38369790 DOI: 10.3760/cma.j.cn115330-20231027-00171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Objective: This study aims to investigate the current application and the level of knowledge of intraoperative facial nerve monitoring among medical staff in China. Methods: A comprehensive online questionnaire was conducted among medical professionals across different regions in China from October 2022 to February 2023. The survey exclusively targeted departments specializing in otolaryngology, head and neck surgery, neurosurgery, and oral and maxillofacial surgery. The questionnaire covered various aspects including general information, intraoperative facial nerve monitoring practices, training history, indications for monitoring, parameters used during monitoring procedures, as well as factors influencing its implementation. Results: A total of 417 participants from 31 provincial, municipal, and autonomous regions were included. Intraoperative facial nerve monitoring was found to be implemented in 227 (54.4%,227/417) repondents of 53 institutions (24.9%, 53/213). The top three indications for implementing this technique were acoustic neuroma, parotid gland surgery, and modified middle ear surgery (mastoidectomy). Herein 81.1%(184/227) medical staff involved in intraoperative facial nerve monitoring had received relevant training, 57.3%(130/227)-92.1%(209/227) reported a lack of clear description regarding recording thresholds, stimulation currents/frequencies/wave widths. Conclusion: The majority of the institutions surveyed have not yet adopted intraoperative facial nerve monitoring. Furthermore, significant gaps concerning the procedure exist. It is imperative to establish standards or guidelines to promote its better development and application.
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Affiliation(s)
- Y Zhao
- Department of Otorhinolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - S B Xue
- Department of Otorhinolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - X Tian
- Department of Otorhinolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - G D Feng
- Department of Otorhinolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Z Q Gao
- Department of Otorhinolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
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Abstract
Apoptosis manifests in two major execution programs downstream of the death signal: the caspase pathway and organelle dysfunction. An important antiapoptosis factor, Bcl-2 protein, contributes in caspase pathway of apoptosis. Calcium, an important intracellular signal element in cells, is also observed to have changes during apoptosis, which maybe affected by Bcl-2 protein. We have previously reported that in Harringtonine (HT) induced apoptosis of HL-60 cells, there's a change of intracellular calcium distribution, moving from cytoplast especially Golgi's apparatus to nucleus and accumulating there with the highest concentration. We report here that caspase-3 becomes activated in HT-induced apoptosis of HL-60 cells, which can be inhibited by overexpression of Bcl-2 protein. No sign of apoptosis or intracellular calcium movement from Golgi's apparatus to nucleus in HL-60 cells overexpressing Bcl-2 or treated with Ac-DEVD-CHO, a specific inhibitor of caspase-3. The results indicate that activated caspase-3 can promote the movement of intracellular calcium from Golgi's apparatus to nucleus, and the process is inhibited by Ac-DEVD-CHO (inhibitor of caspase-3), and that Bcl-2 can inhibit the movement and accumulation of intracellular calcium in nucleus through its inhibition on caspase-3. Calcium relocalization in apoptosis seems to be irreversible, which is different from the intracellular calcium changes caused by growth factor.
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Affiliation(s)
- M Zhang
- Department of Biology, Beijing Normal University, China
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3
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He QY, Zhang HQ, Pang DB, Chi XS, Xue SB. [Retardation of human drug-resistant HL-60 cell in G1 phase and induction of sensitive cell to apoptosis by cyclosporine A]. Yao Xue Xue Bao 1998; 31:721-6. [PMID: 9863237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
To further study the relationship between resistance to apoptosis and drug resistance in harringtonine-resistant HL-60 cells (HR20), cyclosporine A (CsA) 20, 10 micrograms.ml-1 was shown to induce the sensitive HL-60 cells to apoptosis, showing a typical DNA "ladder" band. But the same concentrations of CsA retarded the HR20 cells in G1 phase and could not induce the cells to apoptosis. The cellular daunorubicin accumulation increased when HR20 cells were treated with low concentration of CsA and the reversal of drug resistance by CsA was unrelated to the retardation of cell cycle progression. High phosphorylation of about 50 kDa protein occured when HR20 cells were treated with CsA 10 micrograms.ml-1. The results domonstrate that cyclosporine A retarded the harringtonine-resistant HL-60 cells in G1 phase but induced HL-60 cells to apoptosis, and the retardation was unrelated to drug resistance.
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Affiliation(s)
- Q Y He
- Department of Biology, Beijing Normal University
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4
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Meng FH, He QY, Zhang HQ, Xue SB. Inhibition of harringtonine-induced apoptosis by tetradecanoylphorbol acetate in human leukemia HL-60 cells. Zhongguo Yao Li Xue Bao 1997; 18:459-62. [PMID: 10322942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
AIM To study the changes of the apoptosis induced by camptothecin (Cam) or harringtonine (Har) in human leukemia HL-60 cells after the cells were preincubated with tetradecanoylphorbol acetate (TA). METHODS Chromatin condensation observation, flow cytometry, DNA agarose gel electrophoresis, and Dot blot hybridization. RESULTS After the HL-60 cells were preincubated with TA 200 nmol.L-1 for 6 h, the apoptosis induced by Har 0.1 mg.L-1 for 3 h was drastically inhibited, and the apoptosis by Cam 0.2 mg.L-1 for 3 h was partly inhibited. On the other hand, the expression level of c-myc gene in HL-60 cells decreased apparently after the preincubation of TA. CONCLUSION TA preincubation inhibited the apoptosis induced by Har obviously or by Cam partly in human leukemia HL-60 cells, and the expression of c-myc gene decreased drastically in the preincubated cells, which might result in the inhibition of apoptosis.
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Affiliation(s)
- F H Meng
- Department of Biology, Beijing Normal University, China
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Meng FH, He QY, Chi XS, Zhou WD, Zhang HQ, Xue SB. [Effects of differentiation status on apoptosis of human leukemia HL60 cells]. Yao Xue Xue Bao 1997; 32:496-501. [PMID: 11596273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
The effects of differentiation of human leukemia HL60 cells on harringtonine(Har) and camptothecin(Cam) induced apoptosis(in these cells) were studied. When treated with phorbol 12-myriate, 13-acetate 16 nmol.L-1 for 24 h, the HL60 cells differentiated into monocyte/macrophage cells and were arrested at G1 phase. The differentiated cells were shown to be resistant to the Har and Cam induced apoptosis, but showed no change of expression of c-myc gene. HL60 cells incubated in 1.4% dimethyl sulfoxide for 48 h differentiated into granulocyte cells and were also gene arrested at G1 phase. The differentiated cells became resistant to the apoptosis induced by Cam, but not that by Har, and expression of c-myc decreased drastically in the differentiated cells. The results indicate that the differentiated status of human leukemia HL60 cells apparently affected the apoptosis induced by harringtonine and camptothecin, but it was irrelevant to the change of the expression of c-myc gene.
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Affiliation(s)
- F H Meng
- Department of Biology, Beijing Normal University, Beijing 100875
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6
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Huang QQ, Fang M, Zhang HQ, Xue SB. Cyclosporine inhibited calcium-mediated apoptosis of HL-60 cells. Zhongguo Yao Li Xue Bao 1997; 18:262-6. [PMID: 10072947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
AIM To study the effects of cyclosporine (Cyc) on apoptosis of HL-60 cells. METHODS Apoptotic cells induced by harringtonine (Har), camptothecin (Cam), or calcimycin (Cal), thapsigargin (Tha) were identified with DNA electrophoresis, morphology, and flow cytometry. Relative [Ca2+]i alteration of apoptotic HL-60 cells were determined with flow cytometry. RESULTS Cal 1 mg.L-1 or Tha 0.5 mg.L-1 induced apoptosis of HL-60 cells. This effect was inhibited by nontoxic concentration of Cyc 1 mg.L-1. Cyc did not inhibit Har- or Cam-induced apoptosis of HL-60 cells. Both Cal and Tha increased intracellular calcium, whereas Har or Cam did not. CONCLUSION Cyc inhibited apoptosis only induced by calcium increasement in HL-60 cells. The mechanism of apoptosis induced by Cal or Tha was different from that by Har or Cam.
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Affiliation(s)
- Q Q Huang
- Department of Biology, Beijing Normal University, China
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7
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Wang RH, Xue SB. Staurosporine blocked normal cells at G1/S boundary. Zhongguo Yao Li Xue Bao 1997; 18:161-5. [PMID: 10072972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
AIM To reveal the regulating difference of G1/S-phase transition between normal and tumor cells by using staurosporine, an unspecific kinase inhibitor. METHODS Flow cytometry, Dot blot, kinase activity assay, and electrophoresis. RESULTS A 18-h treatment with staurosporine (5 micrograms.L-1) blocked normal cell line 2BS cells (normal human embryonic lung fibroblast, 5-20 passages) in G1 phase, decreased their thymidine kinase (TK) mRNA level and activity, and also dephosphorylated an intracellular 107 kDa protein. Meanwhile, all these effects in 2BS cells disappeared only by washing staurosporine away. Such kind of effects did not occur in tumor cell line BGC-823 cells (human stomach cancer cell). CONCLUSION During the period of G1/S-phase transition, the kinases involved are more sensitive to staurosporine in normal cells than in tumor cells.
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Affiliation(s)
- R H Wang
- Department of Biology, Beijing Normal University, China
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8
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He QY, Zhang HQ, Pang DB, Chi XS, Xue SB. Resistance to apoptosis of harringtonine-resistant HL60 cells induced by tetrandrine. Zhongguo Yao Li Xue Bao 1996; 17:545-9. [PMID: 9863153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
AIM To study the mechanism of resistance to apoptosis in the harringtonine (Har)-resistant HL60 cells with tetrandrine (Tet). METHODS Growth inhibition, flow cytometry, DNA agarose gel electrophoresis, protein phosphorylation, and RNA dot hybridization. RESULTS The resistant cells had no cross resistance to Tet. Tet induced the sensitive but not the Har-resistant HL60 cells to apoptosis. The high phosphorylation of protein < 30 kDa occurred when the resistant cells were treated with Tet. Tet and Har increased the expression of c-myc mRNA in the sensitive HL60 cells. The expression of c-myc mRNA in the resistant cells was obviously decreased and almost not changed in treatment with Tet and Har. CONCLUSION Tet induced the sensitive but not the Har-resistant HL60 cells to apoptosis, and the resistance to apoptosis induced by Tet was associated with the high protein phosphorylation and reduction of the expression of c-myc mRNA.
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Affiliation(s)
- Q Y He
- Department of Biology, Beijing Normal University, China
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9
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Zhou WD, Zhang HQ, Fang M, Xue SB. Correlation between expression of mdr-1 gene and oncogenes in human promyelocytic leukemic HL60 cell line and sublines. Zhongguo Yao Li Xue Bao 1996; 17:471-3. [PMID: 9863178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
Abstract
AIM To study the relationship between expression of oncogenes and multiple drug resistant (MDR) phenotype. METHODS The drug resistant level of HL60 cell line and its sublines were determined with flow cytometry. RNA Dot blot hybridization was used to identify the expression of oncogenes and mdr-1 gene. RESULTS The expression of mdr-1 gene was in the opposite relation with c-myc expression, but in the positive relation with c-H-ras gene expression in the multiple drug resistant cell lines. In non-MDR cell line HL60/RA, the expression levels of mdr-1, c-myc, and c-H-ras were the same as HL60 parental cells. CONCLUSION Multiple drug resistance is related to not only mdr-1 expression, but also some oncogenes expression level.
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Affiliation(s)
- W D Zhou
- Department of Biology, Beijing Normal University, China
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10
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He QY, Zhou WD, Ji L, Zhang HQ, He NG, Xue SB. Characteristics of harringtonine-resistant human leukemia HL60 cell. Zhongguo Yao Li Xue Bao 1996; 17:463-7. [PMID: 9863176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
AIM To study the mechanisms of the resistance to harringtonine (Har) in the HL60 cells. METHODS Growth inhibition, karyotype analysis, flow cytometry, Western blotting and polymerase chain reaction. RESULTS The Har-resistant HL60 cell line, named HR20, showed cross resistance to homoharringtonine, doxorubicin, daunorubicin, vincristine, and colchicine. The growth doubling time and the cell numbers in G1 phase were increased. The accumulation of cellular daunorubicin in the resistant cells was obviously reduced, but distinctly increased by tetrandrine and verapamil. The numbers of telocentromeric chromosome increased and the chromosomal aberration more occured in the resistant cells. The resistant cells overexpressed multidrug resistant mdr-1 gene and P-glycoprotein 150 kDa. CONCLUSION The Har-resistant HL60 cell strain belonged to a multidrug resistance strain, overexpressing mdr-1 gene and P-glycoprotein.
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Affiliation(s)
- Q Y He
- Department of Biology, Beijing Normal University, China
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11
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Fang M, Zhang HQ, Xue SB. [Apoptosis of HL-60 cells induced by Harringtonine: membrane blebs, nucleus blebs and chromatin condensation]. Shi Yan Sheng Wu Xue Bao 1996; 29:221-33. [PMID: 9639809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Using Video Enhancement Contrast (VEC) microscopy, we recorded the morphological changes of same HL-60 cell in the processes of apoptosis induced by harringtonine. Our results show that all of apoptotic cells need several nucleus blebs before their chromatin condensation. Every nucleus bleb is induced by a relative membrane bleb. The number of membrane blebs is much higher than that of nucleus blebs, so there are only some of membrane blebs which can induce nucleus blebs. It suggested that membrane and nucleus blebs probably are related to apoptotic chromatin condensation. After HL-60 cells pretreated with cytochalasin B(CB), apoptotic chromatin condensation delayed eight hours, but no membrane bleb, nucleus bleb and apoptotic body formed eventually. So membrane and nucleus blebs during apoptosis are related to microfilament re-organization and can accelerate apoptotic chromatin condensation, but are unnecessary for apoptotic chromatin condensation. All this suggested that nuclear changes and cytoplasmic changes during HL-60 cell apoptosis are independent.
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Affiliation(s)
- M Fang
- Department of Cell Biology, Beijing Normal University
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12
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Wang RH, Fang M, Xue SB. [Changes of intracellular calcium, calmodulin in normal and tumor cells traggered by staurosporine]. Shi Yan Sheng Wu Xue Bao 1996; 29:133-9. [PMID: 9387792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Treated with low dosage staurosporine, the normal cell 2 BS were arrested in G 1 phase, but tumor cell BGC-823 were not. We measured the intracellular calcium, calmodulin, Ca(2+)-activited calmodulin (Ca(2+)-CaM) contents of single cells according to cell cycle with microphotometry. Our results showed that treatment of 5 ng/ml staurosporine for 18 h caused the changes of calcium and calmodulin. In 2 BS cells, CaM leval decreased in G 1 and S phase. In each cell cycle phase of BGC-823 cells, there was no changes in CaM level, but Ca(2+)-CaM level increased. The causes of that staurosporine blocked 2 BS cells at G 1 phase but not effected on cell cycle progression in BGC-823 cells may be the results of staurosporine decreased the contents of CaM at G 1 phase and inhibited the phosphoralation of p107 in 2 BS cells.
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Affiliation(s)
- R H Wang
- Department of Biology, Beijing Normal University
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13
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Wang RH, Zhang HQ, Fang M, Xue SB. [Protein kinase inhibitor staurosporine enhances cytotoxicity of antitumor drugs to cancer cells]. Yao Xue Xue Bao 1996; 31:411-5. [PMID: 9275719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Treated with low dosage (5 ng.ml-1) of staurosporine for 18 h, human embryo lung 2BS cells were blocked at the G1/S boundary, but human gastric carcinoma BGC-823 cells still kept their cell cycle. In comparison with IC50 of 2BS and BGC-823 cells treated with cell cycle phase specific antitumor drugs adriamycin, Ara-C and BLM A5 alone or combined with staurosporine 5 ng.ml-1, the IC50 values increased from 0.325 microgram.ml-1, 5 micrograms.ml-1 and 6.5 micrograms.ml-1 to 0.45 microgram.ml-1, 10 micrograms.ml-1 and 6.5 micrograms.ml-1, respectively in 2BS cells; but decreased from 0.325 microgram.ml-1, 25 micrograms.ml-1 and 1.1 micrograms.ml-1 to 0.07 microgram.ml-1, 6.25 micrograms.ml-1 and 0.4 microgram.ml-1, respectively in BGC-823 cells. These results suggest that combination of staurosporine 5 ng.ml-1 with antitumor drugs showed different effects on tumor cells and normal cells. With the GSH fluorescent probe mBCL, we found that GSH contents increased in 2BS cells treated with staurosporine 5 ng.ml-1.
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Affiliation(s)
- R H Wang
- Department of Biology, Beijing Normal University
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14
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Jiang B, Zhang HQ, Xue SB. [Drug resistance of doxorubicin-resistant CHO cell line]. Zhongguo Yao Li Xue Bao 1994; 15:189-92. [PMID: 7516612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Some characteristics of doxorubicin-resistant CHO cell line (RC1) were studied by means of cell biological methods and SDS-PAGE electrophoresis. The resistance factor was 16.5-fold, and RC1 revealed cross-resistances to colchicine, actinomycin and harringtonine. By indirect immunofluorescence assay, P-glycoprotein was not detected. Compared with CHO, the doxorubicin (Dox) uptake and accumulation of RC1 decreased, but the membrane fluidity of RC1 increased. The reduction in drug accumulation was correlated with increase in membrane fluidity. Dox was mainly distributed in the cell nucleus of CHO, but in both cytoplasm and nucleus of RC1. This suggested that Dox was transported more slowly in RC1 cytoplasm than in CHO cytoplasm, resulting in less Dox entrance into the cell nucleus of RC1 than into that of CHO. We also found that a 30-40 kDa nuclear protein which was expressed normally in CHO disappeared in RC1.
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Affiliation(s)
- B Jiang
- Department of Biology, Beijing Normal University, China
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15
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Xue SB, Zhang HQ, Cheng RX, Li SW. Increase of calcium levels at interphase in NIH 3T3 cells. Sci China B 1993; 36:314-8. [PMID: 8397802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The fluorescent calcium ion indicator dye Fluo-3 and DNA-binding dye Hoechst 33342 were employed to determine, in a quantitative microspectrofluorometric study, the intracellular calcium ion concentration ([Ca2+]i) and the DNA content of individual living NIH3T3 cells. The well-separated excitation and emission properties of these dyes allowed us to establish for each cell both the phase of the cell cycle using DNA content and [Ca2+]i. We found that the transition from G1, through S, to the G2 phase is accompanied by a two-fold increase in [Ca2+]i. The [Ca2+]i was inhomologous in each phase of the interphase (G1, S and G2) although [Ca2+]i in the S and G2 phases was never lower than certain threshold values in the G1 and S phases respectively. [Ca2+]i in G0 cells was lower than that in G1 cells. These changes in [Ca2+]i suggest that [Ca2+]i may be an important regulator of cell cycle progression.
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Affiliation(s)
- S B Xue
- Department of Biology, Beijing Normal University, PRC
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16
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He QY, Jiang B, Zhang HQ, Xue SB. Reversal of doxorubicin resistance by tetrandrine in Chinese hamster ovary cell line. Zhongguo Yao Li Xue Bao 1992; 13:416-9. [PMID: 1300043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Tetrandrine (Tet) 0.5 microgram.ml-1 and 1 microgram.ml-1 potentiated 2.88- and 4.3-fold growth-inhibitory effects of doxorubicin (Dox) in Chinese hamster ovary cell line (CHO), respectively, while Tet 1 microgram.ml-1 and 2.5 micrograms.ml-1 potentiated 7.3- and 8.4-fold in its resistant cell line (CHO/Dox), respectively. The colony-forming efficiencies were reduced in CHO and CHO/Dox when the cells were treated with noncytotoxic doses of Tet 2.5 micrograms.ml-1 and 5 micrograms.ml-1 in combination with different concentration of Dox. Increase in accumulation of Dox in CHO/Dox cells was shown by fluorometry. The result indicated that Tet reversed the resistance to Dox in CHO/Dox cells.
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Affiliation(s)
- Q Y He
- Department of Biology, Beijing Normal University, China
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17
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Liu HT, Wang DS, Zhang HQ, Xue SB, You JS, Du CY, Wang XL. [The effect of db-cAMP on the gene expression of calmodulin and cytoskeleton in the transformed cells]. Shi Yan Sheng Wu Xue Bao 1990; 23:273-83. [PMID: 1965387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We have demonstrated that the distribution of microtubules (MT), microfilaments (MF) and fibronectin (FN) were diminished, while the gene expression of the calmodulin and c-fos enhanced in the transformed C3 H10 T1/2 cells. After treatment with 1 mM db-cAMP for 1 hr. and 2 hrs., there was an early and rapidly reduced in gene expression of calmodulin and c-fos respectively. After db-cAMP treatment for 4-5 days, the number of Capping cells of ConA binding decreased significantly and the cell surface microvilli decreased also. The growth of treated cells was inhibited markedly. By using 4F1 cDNA probe, which is preferentially expressed in G1 phase, we have found that the db-cAMP treated cells were accumulated at G1 phase. Of particular interest is the fact that the distribution of microtubules, microfilaments and fibronectin were recovered after treatment with 1 mM db-cAMP for 6 days. It is suggested that the inhibition of proliferation, alteration of phenotype and recovery of cytoskeleton in transformed cells after treatment with db-cAMP are related to the inhibition of gene expression of calmodulin.
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Affiliation(s)
- H T Liu
- Department of Biology, Beijing Normal University, China
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18
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Zhang HQ, He NG, Xue SB. [Effect of bleomycin A5 with calmodulin inhibitor on the proliferation of S-180 cells in vitro]. Zhongguo Yao Li Xue Bao 1990; 11:470-3. [PMID: 1718143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The effect of bleomycin A5 (BLM) alone and along with calmodulin inhibitor N-(4-aminobutyl)-5-chloro-2-naphthalene sulfonamide (W-13) on the proliferation of S-180 cells in vitro were studied. IC50 of BLM alone to the cells was about 2.63 micrograms/ml, which was decreased to 1/3.8 and 1/9.5 of 2.63 micrograms/ml when plus W-13 1, 5 micrograms/ml respectively. The results indicated that nontoxic doses of W-13 enhanced the inhibition of cell proliferation under the condition of BLM 0.5-2.5 micrograms/ml. In colony forming test, the survival fraction of S-180 cells treated with BLM plus W-13 was decreased to 1/87-240 of the cells treated with BLM alone. The results suggest that W-13 can enhance antitumor activity of BLM in vitro and may be used as an enhancer of BLM in vivo.
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Affiliation(s)
- H Q Zhang
- Department of Biology, Beijing Normal University, China
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19
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Zhang Y, Wang DS, Zheng DD, Zhang HQ, Xue SB. [Studies on the changes in calcium fluxes in ts-RSV LA 90 cells transformation]. Shi Yan Sheng Wu Xue Bao 1990; 23:333-40. [PMID: 1965388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
To study the role of Ca2+ fluxes and [Ca2+]i in cell transformation by the v-src gene, ts-RSV LA 90 cells was used in this experiment. Ca2+ fluxes across the plasma membrane was measured with radioisotopes. The relative [Ca2+]i in LA 90 cells loaded Indo-1AM was measured by computer-based Optical Multichannel Analyzer connected with fluorescence microscopy. It was observed that changes in rate of Ca2+ fluxes across the plasma membrane are one of the earliest detectable changes of LA 90 cells transformation. Rates of Ca2+ fluxes in transformed LA 90 cells (40 degrees C) is higher than that in normal LA 90 cells (33 degrees C) and rates of Ca2+ fluxes increased in 25 minutes when LA 90 cells shifted from nonpermissive (40 degrees C) to permissive (33 degrees C) temperature. TMB-8 inhibited increases in rate of Ca2+ efflux induced by pp 60 v-src, and increase in rate of Ca2+ efflux in normal LA 90 cells was stimulated by calf serum. The rate of Ca2+ efflux was related to the changes in temperature. The increase in rate of Ca2+ influx induced by pp 60 v-src could be blocked by verapamil. The rate of Ca2+ influx was not affected by the changes in temperature. The increase in relative [Ca2+]i induced by pp 60 v-src is one of the early events in the transformation process. The level of [Ca2+]i in transformed LA 90 cells was about 2-3 times as much as that in normal LA 90 cells.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- Y Zhang
- Department of Biology, Beijing Normal University, China
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20
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He NG, Zhang HQ, Wang RH, Yang XL, Xue SB. [Enhancement of antitumor activity of bleomycin A5 in mouse sarcoma 180 cells in vitro and in vivo by verapamil]. Zhongguo Yao Li Xue Bao 1990; 11:381-4. [PMID: 1716815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Verapamil (Ver), a calcium influx blocker, enhanced the cytotoxicity of bleomycin A5 (BLM) in cultured S-180 cells. IC50 of BLM to the cells was about 2.6 micrograms/ml when the cells were treated with BLM alone, but when the cells were treated with BLM plus Ver 1, 5, 10 micrograms/ml, the IC50 were 1/1.2, 1/5.2, 1/7.4 of the cells treated with BLM alone, respectively. In colony test, the survival fractions of the cells treated with BLM 20, 60, 100 micrograms/ml plus Ver 60 micrograms/ml were 1/7, 1/8, 1/11 of the cells treated with BLM alone, respectively. Ver enhanced the growth inhibitory actions of BLM in mice bearing S-180 sarcoma by 60% or over. The mean survival the growth inhibitory actions of BLM in mice bearing S-180 sarcoma by 60% or over. The mean survival time of the mice bearing S-180 ascites sarcoma treated with BLM plus Ver was prolonged 21% from that of the mice treated with BLM alone. The results suggest that Ver may be used clinically as an antitumor enhancer of BLM.
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Affiliation(s)
- N G He
- Department of Biology, Beijing Normal University, China
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Wang DS, Li SW, Zeng CQ, Cheng RX, Xue SB. Microtubule and microfilament distribution and tubulin content in the cell cycle of Indian muntjac cells. Cytometry 1988; 9:368-73. [PMID: 3402282 DOI: 10.1002/cyto.990090414] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Using DAPI, rabbit antitubulin antibody, FITC-labeled goat anti-rabbit IgG, and TRITC-phalloidin to stain individual cells, the microspectrophotometric analysis showed that three markers that represent the nucleus, microtubules (MT), and microfilaments (MF), respectively, could be recognized in individual cells without interference. The phase of the cell cycle was determined by DNA content. We found that in Indian muntjac (IM) cells, the amount of tubulin in G2 and M phases was about twice as much as that in G1 phase. In G2 cells, the cytoplasmic microtubule complex (CMTC) became denser than in G1 cells. The cytoplasmic MT extent in basically the same orientation as MF bundles in interphase. The regions where the MT is denser also have a denser MF distribution.
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Affiliation(s)
- D S Wang
- Department of Biology, Beijing Normal University, China
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22
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Wei SM, Guo Q, Dong ZW, Xue SB, Song PG. [Expression of the surface antigen in human gastric cancer cells and the relation to cell cycles--correlated analysis with flow cytometry]. Zhonghua Zhong Liu Za Zhi 1987; 9:179-82. [PMID: 3447858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Expression of tumor-associated antigen in different gastric cancer cell lines and different phases of cell cycle was studied cytochemically. The antigen was recognized by the monoclonal antibody (McAb) PC1 against gastric cancer cells. By using the McAb PC1 as first antibody, the indirect immunofluorescence stain and the peroxidase-anti-peroxidase (PAP) stain were done on the gastric cancer cell lines (MGC 803, SGC 7901 and BGC 823). It was shown that PC1 antigen was mainly expressed on the membrane of these cells and only a certain percentage of the cells gave the positive reaction with different intensities. It was obvious that the expression of PC1 antigen was heterogeneous in nature. The heterogeneity of the PC1 antigen expression in gastric cancer cells might be due to either various subpopulations in the cell lines or different phases of cell cycle. In order to go further into the question, we studied quantitatively the expression of PC1 antigen in gastric cancer cell lines (MGC 803, STC 7901 and BGC 823) and the relationship between the antigen expression and cell cycle by double fluorescence stain and two-dimensional flow cytometry. It was found that expression levels of PC1 antigen in these cell lines were in the following order: MGC 803 greater than SGC 7901 greater than BGC 823. The PC1 antigen predominantly expressed on G1 phase for MGC 803 and G1, G2-M phase for SGC 7901 respectively. And uniform low level of PC1 antigen expression was found for BGC 823 throughout the cell cycle. Therefore, the PC1 antigen expression is dependent on cell cycle in MGC 803 and SGC 7901 cell lines.
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Affiliation(s)
- S M Wei
- Beijing Institute for Cancer Research
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Xue SB, Paiiavicini MG, Gray JW. Double label radioactivity per cell (RC) analysis in vivo: rapid cytokinetic analysis of the KHT sarcoma. Shi Yan Sheng Wu Xue Bao 1985; 18:215-24. [PMID: 3835752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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24
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Xue SB, Cheng ZH, Liu HT, Li SW, Zhang HQ, Cheng RX, Hu YY, Xu P. [Effects of bleomycin A5 on cell cycle of Chinese hamster ovary cells]. Zhongguo Yao Li Xue Bao 1984; 5:112-114. [PMID: 6205543] [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: 05/21/2023]
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25
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Xue SB, Xu P, Li SW, Hu YY, Xiao JJ, Han R, Feng JB. [Effect of harringtonine and homoharringtonine on the traverse of cell cycle of P388 leukemic cells by flow cytometry]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1984; 6:28-31. [PMID: 6238691] [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: 01/19/2023]
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26
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Zhang HQ, Liu HT, Deng ZX, Pan WL, Hu YY, Xue SB. [Cell cycle phase sensitivity of CHO cell to Pingyangmycin]. Yao Xue Xue Bao 1982; 17:755-60. [PMID: 6188321] [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: 01/18/2023]
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27
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Darzynkiewicz Z, Traganos F, Xue SB, Melamed MR. Effect of n-butyrate on cell cycle progression and in situ chromatin structure of L1210 cells. Exp Cell Res 1981; 136:279-93. [PMID: 7308309 DOI: 10.1016/0014-4827(81)90006-9] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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28
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Xue SB, Liu HT, Zhang HQ, Li DD, Lin HY. [Distribution of various 57Co-labelled zhengguangmycin preparations in Ehrlich carcinoma bearing mice in relation with their antitumor activity and toxicity (author's transl)]. Yao Xue Xue Bao 1980; 15:1-6. [PMID: 6161520] [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: 01/18/2023]
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