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Benković V, Milić M, Oršolić N, Horvat Knežević A, Brozović G, Borojević N. Brain DNA damaging effects of volatile anesthetics and 1 and 2 Gy gamma irradiation in vivo: Preliminary results. Toxicol Ind Health 2023; 39:67-80. [PMID: 36602468 DOI: 10.1177/07482337221145599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Although both can cause DNA damage, the combined impact of volatile anesthetics halothane/sevoflurane/isoflurane and radiotherapeutic exposure on sensitive brain cells in vivo has not been previously analyzed. Healthy Swiss albino male mice (240 in total, 48 groups) were exposed to either halothane/sevoflurane/isoflurane therapeutic doses alone (2 h); 1 or 2 gray of gamma radiation alone; or combined exposure. Frontal lobe brain samples from five animals were taken immediately and 2, 6, and 24 h after exposure. DNA damage and cellular repair index were analyzed using the alkaline comet assay and the tail intensity parameter. Elevated tail intensity levels for sevoflurane/halothane were the highest at 6 h and returned to baseline within 24 h for sevoflurane, but not for halothane, while isoflurane treatment caused lower tail intensity than control values. Combined exposure demonstrated a slightly halothane/sevoflurane protective and isoflurane protective effect, which was stronger for 2 than for 1 gray. Cellular repair indices and tail intensity histograms indicated different modes of action in DNA damage creation. Isoflurane/sevoflurane/halothane preconditioning demonstrated protective effects in sensitive brain cells in vivo. Owing to the constant increases in the combined use of radiotherapy and volatile anesthetics, further studies should explore the mechanisms behind these effects, including longer and multiple exposure treatments and in vivo brain tumor models.
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Affiliation(s)
- Vesna Benković
- Faculty of Science, 117036University of Zagreb, Zagreb, Croatia
| | - Mirta Milić
- Mutagenesis Unit, 118938Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Nada Oršolić
- Faculty of Science, 117036University of Zagreb, Zagreb, Croatia
| | | | - Gordana Brozović
- Department of Anesthesiology, Reanimatology and ICU, University Hospital for Tumors, 499232Sestre Milosrdnice University Hospital Centre, Zagreb, Croatia.,Faculty of Dental Medicine and Health, 84992University of Osijek, Osijek, Croatia
| | - Nikola Borojević
- 8256Warrington and Halton Teaching Hospitals NHS Foundation Trust, Warrington, UK
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Benković V, Borojević N, Šikić D, Horvat Knežević A, Milić M. DNA damage assessment in peripheral blood of Swiss albino mice after combined exposure to volatile anesthetics and 1 or 2 Gy radiotherapy in vivo. Int J Radiat Biol 2021; 97:1425-1435. [PMID: 34328801 DOI: 10.1080/09553002.2021.1962565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
PURPOSE Patient immobilization by general volatile anesthesia (VA) may be necessary during medical radiology treatment, and its use has increased in recent years. Although ionizing radiation (IR) is a well-known genotoxic and cytotoxic agent, and VA exposure has caused a range of side effects among patients and occupationally exposed personnel, there are no studies to date comparing DNA damage effects from combined VA and single fractional IR dose exposure. MATERIAL AND METHODS We investigate whether there is a difference in white blood cells DNA damage response (by the alkaline comet assay) in vivo in 185 healthy Swiss albino mice divided into 37 groups, anesthetized with isoflurane/sevoflurane/halothane and exposed to 1 or 2 Gy of IR. Blood samples were taken after 0, 2, 6 and 24 h after exposure, and comet parameters were measured: tail length, tail intensity and tail moment. The cellular DNA repair index was calculated to quantify the efficiency of cells in repairing and re-joining DNA strand breaks following different treatments. RESULTS In combined exposures, halothane caused higher DNA damage levels that were dose-dependent; sevoflurane damage increase did not differ significantly from the initial 1 Gy dose, and isoflurane even demonstrated a protective effect, particularly in the 2 Gy dose combined exposure. Nevertheless, none of the exposures reached control levels even after 24 h. CONCLUSION Halothane appears to increase the level of radiation-induced DNA damage, while sevoflurane and isoflurane exhibited a protective effect. DNA damage may have been even greater in target organs such as liver, kidney or even the brain, and this is proposed for future study.
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Affiliation(s)
- Vesna Benković
- Faculty of Science, University of Zagreb, Zagreb, Croatia
| | - Nikola Borojević
- Warrington and Halton Teaching Hospitals, NHS Foundation Trust, Lovely Ln, Warrington, UK
| | - Dunja Šikić
- Faculty of Science, University of Zagreb, Zagreb, Croatia
| | | | - Mirta Milić
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, Zagreb, Croatia
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Yang L, He K, Yao S, Zhang Y, Shen J. Sevoflurane inhibits neuroblastoma cell proliferation and invasion and induces apoptosis by miR-144-3p/YAP1 axis. Basic Clin Pharmacol Toxicol 2021; 129:297-307. [PMID: 34192826 DOI: 10.1111/bcpt.13629] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 06/22/2021] [Accepted: 06/22/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND Sevoflurane (SEV) is a typical volatile anaesthetic and has an antitumour activity in various cancer cells. Here, we were curious whether SEV has tumour-suppressive effects in neuroblastoma (NB). METHODS NB cell lines (K-N-SH and SK-N-AS) were treated with SEV (1%, 2% and 4%). Cell Counting Kit-8 (CCK8) and Transwell assays were conducted to examine cell proliferation and invasion, respectively. The apoptosis was verified by flow cytometry, and the yes-associated protein 1 (YAP1), Bax, Bcl2 and cleaved caspase3 levels were detected by western blotting. Quantitative real-time PCR (qRT-PCR) was conducted to monitor the miR-144-3p level in SEV-treated NB cells. The targeted relationship between miR-144-3p and YAP1 was predicted by bioinformatics and testified by the dual-luciferase reporter assay. RESULTS SEV mitigated NB cell proliferation and invasion and strengthened apoptosis dose-dependently. SEV upregulated miR-144-3p. Moreover, the miR-144-3p inhibitor transfection significantly reduced the tumour-suppressive effect of SEV on NB cells. Furthermore, the dual-luciferase reporter assay confirmed that miR-144-3p targeted YAP1 and overexpressing YAP1 partially weakened the inhibitive effects of miR-144-3p on NB cells. CONCLUSION SEV abated NB cell proliferation and invasion and accelerated apoptosis through the miR-144-3p/YAP1 axis.
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Affiliation(s)
- Longqiu Yang
- Huangshi Central Hospital, Affiliated Hospital of Hubei Polytechnic University, Edong Healthcare Group, Huangshi, China
| | - Ke He
- Huangshi Central Hospital, Affiliated Hospital of Hubei Polytechnic University, Edong Healthcare Group, Huangshi, China
| | - Shudong Yao
- Huangshi Central Hospital, Affiliated Hospital of Hubei Polytechnic University, Edong Healthcare Group, Huangshi, China
| | - Yiqiang Zhang
- Huangshi Central Hospital, Affiliated Hospital of Hubei Polytechnic University, Edong Healthcare Group, Huangshi, China
| | - Jun Shen
- Huangshi Central Hospital, Affiliated Hospital of Hubei Polytechnic University, Edong Healthcare Group, Huangshi, China
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Genotoxicity of cisplatin and carboplatin in cultured human lymphocytes: a comparative study. Interdiscip Toxicol 2020; 12:93-97. [PMID: 32206030 PMCID: PMC7071837 DOI: 10.2478/intox-2019-0011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 08/10/2019] [Indexed: 01/03/2023] Open
Abstract
Cisplatin and carboplatin are integral parts of many antineoplastic management regimens. Both platinum analogues are potent DNA alkylating agents that robustly induce genomic instability and promote apoptosis in tumor cells. Although the mechanism of action of both drugs is similar, cisplatin appears to be more cytotoxic. In this study, the genotoxic potential of cisplatin and carboplatin was compared using chromosomal aberrations (CAs) and sister-chromatid exchange (SCE) assays in cultured human lymphocytes. Results showed that cisplatin and carboplatin induced a significant increase in CAs and SCEs compared to the control group (p<0.01). Levels of induced CAs were similar in both drugs; however, the magnitude of SCEs induced by cisplatin was significantly higher than that induced by carboplatin (p<0.01). With respect to the mitotic and proliferative indices, both cisplatin and carboplatin significantly decreased mitotic index (p<0.01) without affecting the proliferative index (p>0.05). In conclusion, cisplatin was found to be more genotoxic than carboplatin in the SCE assay in cultured human lymphocytes, and that might explain the higher cytotoxicity of cisplatin.
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Xue F, Xu Y, Song Y, Zhang W, Li R, Zhu X. The Effects Of Sevoflurane On The Progression And Cisplatinum Sensitivity Of Cervical Cancer Cells. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:3919-3928. [PMID: 31819366 PMCID: PMC6873969 DOI: 10.2147/dddt.s219788] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 10/11/2019] [Indexed: 12/25/2022]
Abstract
Objective To investigate the effect of sevoflurane on the progression of cervical cancer cells, and to explore its effect on the cisplatinum (DDP) sensitivity in cervical cancer cells and underlying mechanism. Methods Siha and Hela cervical cancer cells were cultured and treated with 3% sevoflurane, 10 μmol/L DDP, or the co-treatment of sevoflurane and DDP, respectively. Cell proliferation was evaluated by the CCK8 assay. Cell apoptosis was assessed by flow cytometry. Cell migration was detected by wound healing assay. The expression of B-cell lymphoma-2 (BCL-2), B-cell lymphoma-2 associated X (BAX), Ezrin, matrix metalloproteinase 2 (MMP2), lung resistance-related protein (LRP), multiple drug resistance protein 1 (MRP1), glutathione-S-transferase-π (GST-π), and P glycoprotein (P-gp) protein was determined by Western blotting. Results After treated with sevoflurane, cell proliferation and migration rate in Siha and Hela cells were significantly elevated, while cell apoptosis was decreased. In addition, the expression of migration-related protein Ezrin and MMP2 was increased accordingly, apoptotic-related protein BCL-2 expression was also increased while BAX protein expression was decreased after sevoflurane treatment. The proliferation, migration rate, and apoptosis of Siha and Hela cells in sevoflurane plus DDP group were not significantly different with those in DDP group. There was no significant difference in apoptotic-related protein, migration-related protein, and drug resistance-associated proteins expression between DDP treatment group and combined treatment group. Conclusion Sevoflurane promotes the progression but has no effect on the cisplatinum sensitivity in cervical cancer cells.
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Affiliation(s)
- Fang Xue
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, People's Republic of China
| | - Yichi Xu
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, People's Republic of China
| | - Yizuo Song
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, People's Republic of China
| | - Wenwen Zhang
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, People's Republic of China
| | - Ruyi Li
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, People's Republic of China
| | - Xueqiong Zhu
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, People's Republic of China
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Ciechanowicz S, Zhao H, Chen Q, Cui J, Mi E, Mi E, Lian Q, Ma D. Differential effects of sevoflurane on the metastatic potential and chemosensitivity of non-small-cell lung adenocarcinoma and renal cell carcinoma in vitro. Br J Anaesth 2018; 120:368-375. [DOI: 10.1016/j.bja.2017.11.066] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/28/2017] [Indexed: 01/05/2023] Open
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Oršolić N, Car N. Quercetin and hyperthermia modulate cisplatin-induced DNA damage in tumor and normal tissues in vivo. Tumour Biol 2014; 35:6445-54. [DOI: 10.1007/s13277-014-1843-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 03/12/2014] [Indexed: 11/30/2022] Open
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Oršolić N, Car N, Lisičić D, Benković V, Knežević AH, Dikić D, Petrik J. Synergism between propolis and hyperthermal intraperitoneal chemotherapy with cisplatin on ehrlich ascites tumor in mice. J Pharm Sci 2013; 102:4395-405. [PMID: 24136132 DOI: 10.1002/jps.23755] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 09/17/2013] [Accepted: 09/25/2013] [Indexed: 12/14/2022]
Abstract
We investigated antitumor, genotoxic, chemopreventive, and immunostimulative effects of local chemoimmunotherapy and hyperthermal intraperitoneal chemotherapy (HIPEC) in a mouse-bearing Ehrlich ascites tumor (EAT). Mice were treated with water-soluble derivative of propolis (WSDP) at a dose of 50 mg kg(-1) , 7 and 3 days before implantation of EAT cells, whereas cisplatin (5 or 10 mg kg(-1) ) was injected 3 days after implantation of EAT cells at 37°C and 43°C. The following variables were analyzed: the total number of cells, differential count of the cells present in the peritoneal cavity, functional activity of macrophages, comet assay, and micronucleus assay. The combination of WSDP + CIS 5 mg kg(-1) at 37°C resulted in tumor growth inhibition and increased the survival of mice by additional 115.25%. WSDP with HIPEC increased the survival of mice by additional 160.3% as compared with HIPEC. WSDP reduced cisplatin toxic and genotoxic effect to normal cells without affecting cisplatin cytotoxicity on EAT cells. In addition, WSDP with HIPEC increased the cytotoxic actions of macrophages to tumor cells. Water-soluble derivative of propolis increases macrophage activity and sensitivity of tumor cells to HIPEC and reduces cisplatin toxicity to normal cells.
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Affiliation(s)
- Nada Oršolić
- Department of Animal Physiology, Faculty of Science, University of Zagreb, Zagreb, 10000, Croatia
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Oršolic N, Car N. WITHDRAWN: Quercetin enhances the effect of hyperthermal intraperitoneal chemotherapy with cisplatin in mice. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2013:S1383-5718(13)00265-9. [PMID: 24060507 DOI: 10.1016/j.mrgentox.2013.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 06/06/2013] [Accepted: 07/05/2013] [Indexed: 06/02/2023]
Abstract
The Publisher regrets that this article is an accidental duplication of an article that has already been published, http://dx.doi.org/10.1177/0960327113499048. The duplicate article has therefore been withdrawn.
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Affiliation(s)
- Nada Oršolic
- Department of Animal Physiology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, 10 000 Zagreb, Croatia.
| | - Nikola Car
- Pliva Croatia Ltd., Prilaz baruna Filipovica 25, 10 000 Zagreb, Croatia
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Dabbagh A, Rajaei S. The role of anesthetic drugs in liver apoptosis. HEPATITIS MONTHLY 2013; 13:e13162. [PMID: 24069040 PMCID: PMC3782737 DOI: 10.5812/hepatmon.13162] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 07/13/2013] [Accepted: 08/06/2013] [Indexed: 02/07/2023]
Abstract
CONTEXT The modern practice of anesthesia is highly dependent ona group of anesthetic drugs which many of them are metabolized in the liver. EVIDENCE ACQUISITION The liver, of course, usually tolerates this burden. However, this is not always an unbroken rule. Anesthetic induced apoptosis has gained great concern during the last years; especially considering the neurologic system. RESULTS However, we have evidence that there is some concern regarding their effects on the liver cells. Fortunately not all the anesthetics are blamed and even some could be used safely, based on the available evidence. CONCLUSIONS Besides, there are some novel agents, yet under research, which could affect the future of anesthetic agents' fate regarding their hepatic effects.
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Affiliation(s)
- Ali Dabbagh
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran
- Corresponding author: Ali Dabbagh, Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran. Tel: +98-9121972368, Fax: +98-2122074101, E-mail: ,
| | - Samira Rajaei
- School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, IR Iran
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Orsolic N, Sirovina D, Krbavcic M, Car N. Effect of flavonoids and hyperthermal intraperitoneal chemotherapy on tumour growth and micronucleus induction in mouse tumour model. Hum Exp Toxicol 2013:0960327113499048. [PMID: 23925943 DOI: 10.1177/0960327113499048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Hyperthermia enhanced the clastogenicity of alkylating agents. We investigated whether quercetin (QU; 3,3',4',5,7-pentahydroxy flavone) or naringenin (NAR) can sensitize Ehrlich ascites tumour (EAT) to cisplatin (CP) hyperthermal intraperitoneal chemotherapy treatment and whether these flavonoids in combination with CP can ameliorate CP-induced micronuclei (MNs) in peripheral blood reticulocytes of mice. QU or NAR were administered to mice 7 and 3 days before implantation of EAT cells, while CP (5 or 10 mg kg-1) was injected intraperitoneally to normothermic or hyperthermic-treated mice 3 days after implantation of EAT cells (2 106). Our study supports the claim that the QU or NAR in combined treatment with CP has the potential to inhibit tumour growth in both normothermic and hyperthermic conditions and attenuate number of MNs in the peripheral blood reticulocytes of mice at normothermic condition but enhanced the clastogenicity of CP agents in hyperthermal condition.
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Affiliation(s)
- N Orsolic
- 1Department of Animal Physiology, Faculty of Science, University of Zagreb, Zagreb, Croatia
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Liang H, Wang HB, Liu HZ, Wen XJ, Zhou QL, Yang CX. The effects of combined treatment with sevoflurane and cisplatin on growth and invasion of human adenocarcinoma cell line A549. Biomed Pharmacother 2013; 67:503-9. [PMID: 23639227 DOI: 10.1016/j.biopha.2013.03.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 03/10/2013] [Indexed: 10/27/2022] Open
Abstract
Sevoflurane, an inhalational anesthetic, and cisplatin (DDP)-based chemotherapy have been widely used during lung cancer surgery. However, the effect of sevoflurane on the sensitivity of lung cancer cells to DDP chemotherapy remains unclear. In this study, the effects of combined treatment with sevoflurane and cisplatin on the growth and invasion of human lung adenocarcinoma A549 cell line have been investigated. The underlying mechanism has also been explored. In our experiment, A549 cells were treated with 2.5% sevoflurane, 10μmol/L DDP, or the co-treatment of sevoflurane and DDP for 4h, respectively. Cell proliferation was evaluated by the MTT assay and colony formation assay. Apoptosis was assessed by flow cytometry. Cell invasion was detected by Transwell assay. The expressions of X-linked inhibitor of apoptosis protein (XIAP), Survivin, matrix metalloproteinase (MMP)-2 and MMP-9 were determined by western blotting. Our results showed that sevoflurane combined with DDP resulted in a more pronounced inhibition of tumor cells growth and invasion as compared with either drug alone. Besides, XIAP, Survivin, MMP-2, and MMP-9 were downregulated more significantly by the co-treatment of the two drugs as compared to sevoflurane treatment or DDP treatment alone. Taken together, the growth-inhibitory and invasion-inhibitory synergy between sevoflurane and DDP in human adenocarcinoma A549 cell line was found in this study. Furthermore, we showed that the growth-inhibitory synergy between sevoflurane and DDP might be associated with the downregulation of XIAP and Survivin, and the invasion-inhibitory synergy between sevoflurane and DDP might be involved in the downregulation of MMP-2 and MMP-9.
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Affiliation(s)
- Hua Liang
- Department of Anesthesiology, Affiliated FoShan Hospital of Sun Yat-Sen University, Foshan, 528000 Guangdong, China.
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Brozovic G, Orsolic N, Knezevic F, Horvat Knezevic A, Benkovic V, Sakic K, Borojevic N, Dikic D. The in vivo genotoxicity of cisplatin, isoflurane and halothane evaluated by alkaline comet assay in Swiss albino mice. J Appl Genet 2011; 52:355-61. [PMID: 21509577 DOI: 10.1007/s13353-011-0046-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Revised: 04/03/2011] [Accepted: 04/05/2011] [Indexed: 11/26/2022]
Abstract
The aim of this study was to evaluate the genotoxicity of repeated exposure to isoflurane or halothane and compare it with the genotoxicity of repeated exposure to cisplatin. We also determined the genotoxicity of combined treatment with inhalation anaesthetics and cisplatin on peripheral blood leucocytes (PBL), brain, liver and kidney cells of mice. The mice were divided into six groups as follows: control, cisplatin, isoflurane, cisplatin-isoflurane, halothane and cisplatin-halothane, and were exposed respectively for three consecutive days. The mice were treated with cisplatin or exposed to inhalation anaesthetic; the combined groups were exposed to inhalation anaesthetic after treatment with cisplatin. The alkaline comet assay was performed. All drugs had a strong genotoxicity (P<0.05 vs. control group) in all of the observed cells. Isoflurane caused stronger DNA damage on the PBL and kidney cells, in contrast to halothane, which had stronger genotoxicity on brain and liver cells. The combination of cisplatin and isoflurane induced lower genotoxicity on PBL than isoflurane alone (P<0.05). Halothane had the strongest effect on brain cells, but in the combined treatment with cisplatin, the effect decreased to the level of cisplatin alone. Halothane also induced the strongest DNA damage of the liver cells, while the combination with cisplatin increased its genotoxicity even more. The genotoxicity of cisplatin and isoflurane on kidney cells were nearly at the same level, but halothane caused a significantly lower effect. The combinations of inhalation anaesthetics with cisplatin had stronger effects on kidney cells than inhalation anaesthetics alone. The observed drugs and their combinations induced strong genotoxicity on all of the mentioned cells.
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Affiliation(s)
- Gordana Brozovic
- Department of Anaesthesiology, Reanimatology and Intensive Care Medicine, University Hospital Sv. Duh, Sv. Duh 64, Zagreb, Croatia.
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Translocator protein (18 kDa) mediates the pro-growth effects of diazepam on Ehrlich tumor cells in vivo. Eur J Pharmacol 2009; 626:131-8. [PMID: 19782064 DOI: 10.1016/j.ejphar.2009.09.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Revised: 08/18/2009] [Accepted: 09/08/2009] [Indexed: 01/31/2023]
Abstract
The Translocator Protein (TSPO), previously known as the peripheral-type benzodiazepine receptor, is a ubiquitous drug- and cholesterol-binding protein that is up regulated in several types of cancer cells. TSPO drug ligands (e.g., diazepam) induce or inhibit tumor cell proliferation, depending on the dose and tissue origin. We have previously shown that TSPO is expressed in Ehrlich tumor cells and that diazepam increases proliferation of these cells in vitro. Here, we investigated the in vivo effects of diazepam on Ehrlich tumor growth and the role of TSPO in mediating this process. Oral administration of diazepam to mice (3.0mg/kg/day for 7 days) produced plasma and ascitic fluid drug concentrations of 83.83 and 54.12 nM, respectively. Diazepam increased Ehrlich tumor growth, likely due to its ability to increase tumor cell proliferation and Reactive Oxygen Species production. Radioligand binding assays and nucleotide sequencing revealed that Ehrlich tumor cell TSPO had the same pharmacological and biochemical properties as TSPO described in other tumor cells. The estimated K(d) for PK 11195 in Ehrlich tumor cells was 0.44 nM and 8.70 nM (low and high binding site, respectively). Structurally diverse TSPO drug ligands with exclusive affinity for TSPO (i.e., 4-chlordiazepam, Ro5-4864, and isoquinoline-carboxamide PK 11195) also increased Ehrlich tumor growth. However, clonazepam, a GABA(A)-specific ligand with no affinity for TSPO, failed to do so. Taken together, these data suggest that diazepam induces in vivo Ehrlich tumor growth in a TSPO-dependent manner.
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