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Saghaei Bagheri H, Rasta SH, Mohammadi SM, Rahimi AAR, Movassaghpour A, Nozad Charoudeh H. Low-Level Laser Irradiation Modulated Viability of Normal and Tumor Human Lymphocytes In Vitro. J Lasers Med Sci 2020; 11:174-180. [PMID: 32273959 DOI: 10.34172/jlms.2020.29] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Introduction: Laser radiation is a promising strategy against various malignancies. Recent studies have shown that the application of low-power laser therapy (LPLT) at different doses and exposure times could modulate the growth dynamic of tumor cells. Based on the type of laser, LPLT could potentially trigger cell proliferation, differentiation, and apoptosis in different cell lines. Methods: In this study, MTT assay was used to monitor the effect of low and high laser intensities on the viability of normal and cancer lymphocytes. The protein levels of Ki-67 (a proliferation marker) and Caspase-3 (an apoptosis factor) were measured in human peripheral mononuclear cells (PBMCs) and the B-lymphoblastic cell line (Nalm-6) using flow cytometry after being-exposed to 630-nm LPLT at low (2, 4, 6, and 10 J/cm2 ) and high (15, 30, 60, and 120 J/cm2) energy densities in a continuous mode for 48 and 72 hours. Results: By using higher energy densities, 60 and 120 J/cm2 , a significant decrease was shown in the viability of Nalm-6 cells, which reached 6.6 and 10.1% after 48 hours compared to the control cells (P<0.05). Notably, Cell exposure to doses 30, 60, and 120 J/cm2 yielded 7.5, 12.9, and 21.6 cell viability reduction after 72 hours. The collected data showed that the high-intensity parameters of LPLT (15 to 120 J/cm2) promoted significant apoptotic changes in the exposed cells coincided with the activation of Caspase-3 compared to the none-treated control cells (P<0.05). The data further showed the stimulation of the Ki-67 factor both in primary PBMCs and the lymphoblastic cell line treated with LPLT at energy densities of 4 and 6 J/cm2 (P<0.05), indicating enhanced cell proliferation. Similar to Nalm-6 cells, primary PBMCs showed apoptosis after 48 hours of being exposed to doses 60, and 120 J/cm2 , indicated by increased Caspase-3 levels (P<0.05). As expected, the Nalm-6 cells were resistant to cytotoxic effects of laser irradiation in the first 48 hours (P>0.05) compared to normal PBMCs. The exposure of Nalm-6 cells to low-intensity laser intensities increased a proliferation rate compared to the PBMCs treated with the same doses. Conclusion: We showed the potency of LPLT in the induction of apoptosis and proliferation in human primary PBMCs and Nalm-6 cells in a dose and time-dependent manner after 72 hours.
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Affiliation(s)
- Hesam Saghaei Bagheri
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Medical Physics, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran 3
| | - Seyed Hossein Rasta
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Medical Physics, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran 3.,Department of Medical Bioengineering, Tabriz University of Medical Sciences, Tabriz, Iran.,School of Biomedical Sciences, University of Aberdeen, Aberdeen, UK
| | | | - Ali Akbar Rahim Rahimi
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
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Nussbaum EL, Baxter GD, Lilge L. A Review of Laser Technology and Light-Tissue Interactions as a Background to Therapeutic Applications of Low Intensity Lasers and Other Light Sources. PHYSICAL THERAPY REVIEWS 2013. [DOI: 10.1179/108331903225001381] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Kim KS, Kim SK, Lee PY, Song YH, Kim KB, Jeon EH, Ahn TY. EFFECTS OF LOW INCIDENT ENERGY LEVELS OF INFRARED LASER IRRADIATON ON THE PROLIFERATION OF CANDIDA ALBICANS. PARTIII:. Laser Ther 1995. [DOI: 10.5978/islsm.95-or-18] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ki-Suk Kim
- Department of Oral Medicine, College of Dentistry
| | - Sam-Kum Kim
- Department of Oral Medicine, College of Dentistry
| | | | | | - Ki-Beom Kim
- Department of Oral Medicine, College of Dentistry
| | - Eun-Hyoung Jeon
- Department of Microbiology, College of Natural Sciences, Dankook Universty
| | - Tae-Young Ahn
- Department of Microbiology, College of Natural Sciences, Dankook Universty
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Kim KS, Kim SK, Lee PY, Song YH, Kim KB, Ahn TY. EFFECT OF LOW INCIDENT ENERGY LEVELS OF INFRARED LASER IRRADIATION ON THE PROLIFERATION OF CANDIDA ALBICANS. PART II:. Laser Ther 1995. [DOI: 10.5978/islsm.95-or-08] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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O'Kane S, Shields TD, Gilmore WS, Allen JM. Low intensity laser irradiation inhibits tritiated thymidine incorporation in the hemopoietic cell lines HL-60 and U937. Lasers Surg Med 1994; 14:34-9. [PMID: 8127205 DOI: 10.1002/lsm.1900140110] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The purpose of this study was to determine the effect of low intensity laser irradiation (660 nm, 12 mW, 5 kHz) on tritiated thymidine incorporation in two hemopoietic cell lines, HL-60 and U937. Cells were suspended at a concentration of 1 x 10(6)/ml in their respective serum-free media and irradiated at energy densities from 1.0 to 11.5 J/cm2. Twenty-four hours after irradiation the cells were assayed for their ability to incorporate tritiated thymidine (3H-TdR) in comparison with nonirradiated cells. Analysis by two-way analysis of variance (ANOVA) for unrelated groups showed that laser irradiation at all energy densities > or = 5.8 J/cm2 produced a significant decrease in 3H-TdR incorporation (P < 0.05) into HL-60 cells. In U937 cells, irradiation at energy densities of 5.8, 7.2, and 11.5 J/cm2 caused a similar reduction in 3H-TdR incorporation (P < 0.01), although not at 8.6 and 9.6 J/cm2. The temperature of each cell suspension was recorded both during and immediately postirradiation, and no significant thermal changes were observed. These findings demonstrate a direct photobiological effect of laser irradiation on these two cell lines. The precise mechanism for this effect is unknown but may have significance in understanding the biological action of laser's known therapeutic effectiveness in promoting wound repair.
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Affiliation(s)
- S O'Kane
- Department of Biological and Biomedical Sciences, University of Ulster, Jordanstown, Northern Ireland
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