1
|
Hseu YC, Yeh JT, Vadivalagan C, Chen SJ, Gowrisankar YV, Pandey S, Hsu YT, Yen HR, Huang HC, Hseu JH, Yang HL. The in vitro and in vivo depigmentation activity of coenzyme Q 0, a major quinone derivative from Antrodia camphorata, through autophagy induction in human melanocytes and keratinocytes. Cell Commun Signal 2024; 22:151. [PMID: 38408981 PMCID: PMC10895752 DOI: 10.1186/s12964-024-01537-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 02/18/2024] [Indexed: 02/28/2024] Open
Abstract
BACKGROUND Coenzyme Q0 (CoQ0), a novel quinone derivative of Antrodia camphorata, has been utilized as a therapeutic agent (including antioxidant, anti-inflammatory, antiangiogenic, antiatherosclerotic, and anticancer agents); however, its depigmenting efficiency has yet to be studied. METHODS We resolved the depigmenting efficiency of CoQ0 through autophagy induction in melanoma (B16F10) and melanin-feeding keratinocyte (HaCaT) cells and in vivo Zebrafish model. Then, MPLC/HPLC analysis, MTT assay, Western blotting, immunofluorescence staining, LC3 transfection, melanin formation, GFP-LC3 puncta, AVO formation, tyrosinase activity, and TEM were used. RESULTS CoQ0-induced autophagy in B16F10 cells was shown by enhanced LC3-II accumulation, ATG7 expression, autophagosome GFP-LC3 puncta, and AVOs formation, and ATG4B downregulation, and Beclin-1/Bcl-2 dysregulation. In α-MSH-stimulated B16F10 cells, CoQ0 induced antimelanogenesis by suppressing CREB-MITF pathway, tyrosinase expression/activity, and melanin formation via autophagy. TEM data disclosed that CoQ0 increased melanosome-engulfing autophagosomes and autolysosomes in α-MSH-stimulated B16F10 cells. CoQ0-inhibited melanogenesis in α-MSH-stimulated B16F10 cells was reversed by pretreatment with the autophagy inhibitor 3-MA or silencing of LC3. Additionally, CoQ0-induced autophagy in HaCaT cells was revealed by enhanced LC3-II accumulation, autophagosome GFP-LC3 puncta and AVO formation, ATG4B downregulation, ATG5/ATG7 expression, and Beclin-1/Bcl-2 dysregulation. In melanin-feeding HaCaT cells, CoQ0 induced melanin degradation by suppressing melanosome gp100 and melanin formation via autophagy. TEM confirmed that CoQ0 increased melanosome-engulfing autophagosomes and autolysosomes in melanin-feeding HaCaT cells. Treatment with 3-MA reversed CoQ0-mediated melanin degradation in melanin-feeding HaCaT cells. In vivo study showed that CoQ0 suppressed endogenous body pigmentation by antimelanogenesis and melanin degradation through autophagy induction in a zebrafish model. CONCLUSIONS Our results showed that CoQ0 exerted antimelanogenesis and melanin degradation by inducing autophagy. CoQ0 could be used in skin-whitening formulations as a topical cosmetic application.
Collapse
Affiliation(s)
- You-Cheng Hseu
- Department of Cosmeceutics, College of Pharmacy, China Medical University, Taichung, 406040, Taiwan
- Chinese Medicine Research Center, China Medical University, Taichung, 406040, Taiwan
- Research Center of Chinese Herbal Medicine, China Medical University, Taichung, 406040, Taiwan
- Department of Health and Nutrition Biotechnology, Asia University, Taichung, 413305, Taiwan
| | - Jou-Tsen Yeh
- Institute of Nutrition, College of Health Care, China Medical University, Taichung, 406040, Taiwan
| | - Chithravel Vadivalagan
- Department of Surgery, University of Michigan Medical Center, Ann Arbor, Michigan, 48109, United States
| | - Siang-Jyun Chen
- Institute of Nutrition, College of Health Care, China Medical University, Taichung, 406040, Taiwan
| | | | - Sudhir Pandey
- Department of Cosmeceutics, College of Pharmacy, China Medical University, Taichung, 406040, Taiwan
| | - Yuan-Tai Hsu
- Institute of Nutrition, College of Health Care, China Medical University, Taichung, 406040, Taiwan
| | - Hung-Rong Yen
- Chinese Medicine Research Center, China Medical University, Taichung, 406040, Taiwan
- Research Center of Chinese Herbal Medicine, China Medical University, Taichung, 406040, Taiwan
- Department of Medical Research, China Medical University Hospital, Taichung, 404333, Taiwan
- School of Chinese Medicine, China Medical University, Taichung, 404333, Taiwan
| | - Hui-Chi Huang
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, College of Chinese Medicine, China Medical University, Taichung, 406040, Taiwan
| | - Jhih-Hsuan Hseu
- Department of Dermatology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, 83301, Taiwan.
| | - Hsin-Ling Yang
- Institute of Nutrition, College of Health Care, China Medical University, Taichung, 406040, Taiwan.
| |
Collapse
|
2
|
Yang HL, Lin PY, Vadivalagan C, Lin YA, Lin KY, Hseu YC. Coenzyme Q 0 defeats NLRP3-mediated inflammation, EMT/metastasis, and Warburg effects by inhibiting HIF-1α expression in human triple-negative breast cancer cells. Arch Toxicol 2023; 97:1047-1068. [PMID: 36847822 DOI: 10.1007/s00204-023-03456-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 02/02/2023] [Indexed: 03/01/2023]
Abstract
Coenzyme Q0 (CoQ0) is a derivative quinone from Antrodia camphorata (AC) that exerts anticancer activities. This study examined the anticancer attributes of CoQ0 (0-4 µM) on inhibited anti-EMT/metastasis and NLRP3 inflammasome, and altered Warburg effects via HIF-1α inhibition in triple-negative breast cancer (MDA-MB-231 and 468) cells. MTT assay, cell migration/invasion assays, Western blotting, immunofluorescence, metabolic reprogramming, and LC-ESI-MS were carried out to assess the therapy potential of CoQ0. CoQ0 inhibited HIF-1α expression and suppressed the NLRP3 inflammasome and ASC/caspase-1 expression, followed by downregulation of IL-1β and IL-18 expression in MDA-MB-231 and 468 cells. CoQ0 ameliorated cancer stem-like markers by decreasing CD44 and increasing CD24 expression. Notably, CoQ0 modulated EMT by upregulating the epithelial marker E-cadherin and downregulating the mesenchymal marker N-cadherin. CoQ0 inhibited glucose uptake and lactate accumulation. CoQ0 also inhibited HIF-1α downstream genes involved in glycolysis, such as HK-2, LDH-A, PDK-1, and PKM-2 enzymes. CoQ0 decreased extracellular acidification rate (ECAR), glycolysis, glycolytic capacity, and glycolytic reserve in MDA-MB-231 and 468 cells under normoxic and hypoxic (CoCl2) conditions. CoQ0 inhibited the glycolytic intermediates lactate, FBP, and 2/3-PG, and PEP levels. CoQ0 increased oxygen consumption rate (OCR), basal respiration, ATP production, maximal respiration, and spare capacity under normoxic and hypoxic (CoCl2) conditions. CoQ0 increased TCA cycle metabolites, such as citrate, isocitrate, and succinate. CoQ0 inhibited aerobic glycolysis and enhanced mitochondrial oxidative phosphorylation in TNBC cells. Under hypoxic conditions, CoQ0 also mitigated HIF-1α, GLUT1, glycolytic-related (HK-2, LDH-A, and PFK-1), and metastasis-related (E-cadherin, N-cadherin, and MMP-9) protein or mRNA expression in MDA-MB-231 and/or 468 cells. Under LPS/ATP stimulation, CoQ0 inhibited NLRP3 inflammasome/procaspase-1/IL-18 activation and NFκB/iNOS expression. CoQ0 also hindered LPS/ATP-stimulated tumor migration and downregulated LPS/ATP-stimulated N-cadherin and MMP-2/-9 expression. The present study revealed that suppression of HIF-1α expression caused by CoQ0 may contribute to inhibition of NLRP3-mediated inflammation, EMT/metastasis, and Warburg effects of triple-negative breast cancers.
Collapse
Affiliation(s)
- Hsin-Ling Yang
- Institute of Nutrition, College of Health Care, China Medical University, No. 100, Section 1, Jingmao Road, Beitun, Taichung, 406040, Taiwan
| | - Ping-Yu Lin
- Institute of Nutrition, College of Health Care, China Medical University, No. 100, Section 1, Jingmao Road, Beitun, Taichung, 406040, Taiwan
| | - Chithravel Vadivalagan
- Department of Cosmeceutics, College of Pharmacy, China Medical University, No. 100, Section 1, Jingmao Road, Beitun, Taichung, 406040, Taiwan
| | - Yi-An Lin
- Institute of Nutrition, College of Health Care, China Medical University, No. 100, Section 1, Jingmao Road, Beitun, Taichung, 406040, Taiwan
| | - Kai-Yuan Lin
- Department of Medical Research, Chi-Mei Medical Center, Tainan, 710, Taiwan
- Department of Biotechnology, Chia Nan University of Pharmacy and Science, Tainan, 71710, Taiwan
| | - You-Cheng Hseu
- Department of Cosmeceutics, College of Pharmacy, China Medical University, No. 100, Section 1, Jingmao Road, Beitun, Taichung, 406040, Taiwan.
- Department of Health and Nutrition Biotechnology, Asia University, Taichung, 41354, Taiwan.
- Chinese Medicine Research Center, China Medical University, Taichung, 40402, Taiwan.
- Research Center of Chinese Herbal Medicine, China Medical University, Taichung, 40402, Taiwan.
| |
Collapse
|
3
|
Yang HL, Chang YH, Pandey S, Bhat AA, Vadivalagan C, Lin KY, Hseu YC. Antrodia camphorata and coenzyme Q 0 , a novel quinone derivative of Antrodia camphorata, impede HIF-1α and epithelial-mesenchymal transition/metastasis in human glioblastoma cells. Environ Toxicol 2023. [PMID: 36947447 DOI: 10.1002/tox.23785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 02/01/2023] [Accepted: 03/11/2023] [Indexed: 06/18/2023]
Abstract
Antrodia camphorata (AC) and Coenzyme Q0 (CoQ0 ), a novel quinone derivative of AC, exhibits antitumor activities. The present study evaluated EMT/metastasis inhibition and autophagy induction aspects of AC and CoQ0 in human glioblastoma (GBM8401) cells. Our findings revealed that AC treatment (0-150 μg/mL) hindered tumor cell proliferation and migration/invasion in GBM8401 cells. Notably, AC treatment inhibited HIF-1α and EMT by upregulating epithelial marker protein E-cadherin while downregulating mesenchymal proteins Twist, Slug, Snail, and β-catenin. There was an appearance of the autophagy markers LC3-II and p62/SQSTM1, while ATG4B was downregulated by AC treatment. We also found that CoQ0 (0-10 μM) could inhibit migration and invasion in GBM8401 cells. In particular, E-cadherin was elevated and N-cadherin, Vimentin, Twist, Slug, and Snail, were reduced upon CoQ0 treatment. In addition, MMP-2/-9 expression and Wnt/β-catenin pathways were downregulated. Furthermore, autophagy inhibitors 3-MA or CQ reversed the CoQ0 -elicited suppression of migration/invasion and metastasis-related proteins (Vimentin, Snail, and β-catenin). Results suggested autophagy-mediated antiEMT and antimetastasis upon CoQ0 treatment. CoQ0 inhibited HIF-1α and metastasis in GBM8401 cells under normoxia and hypoxia. HIF-1α knockdown using siRNA accelerated CoQ0 -inhibited migration. Finally, CoQ0 exhibited a prolonged survival rate in GBM8401-xenografted mice. Treatment with Antrodia camphorata/CoQ0 inhibited HIF-1α and EMT/metastasis in glioblastoma.
Collapse
Affiliation(s)
- Hsin-Ling Yang
- Institute of Nutrition, College of Pharmacy, China Medical University, Taichung, 40402, Taiwan
| | - Yao-Hsien Chang
- Department of Cosmeceutics, College of Pharmacy, China Medical University, Taichung, 40402, Taiwan
| | - Sudhir Pandey
- Department of Cosmeceutics, College of Pharmacy, China Medical University, Taichung, 40402, Taiwan
| | - Asif Ali Bhat
- Department of Cosmeceutics, College of Pharmacy, China Medical University, Taichung, 40402, Taiwan
| | - Chithravel Vadivalagan
- Department of Cosmeceutics, College of Pharmacy, China Medical University, Taichung, 40402, Taiwan
| | - Kai-Yuan Lin
- Department of Medical Research, Chi-Mei Medical Center, Tainan, 710, Taiwan
- Department of Biotechnology, Chia Nan University of Pharmacy and Science, Tainan, 71710, Taiwan
| | - You-Cheng Hseu
- Department of Cosmeceutics, College of Pharmacy, China Medical University, Taichung, 40402, Taiwan
- Department of Health and Nutrition Biotechnology, Asia University, Taichung City, 41354, Taiwan
- Chinese Medicine Research Center, China Medical University, Taichung, 40402, Taiwan
- Research Center of Chinese Herbal Medicine, China Medical University, Taichung, 40402, Taiwan
| |
Collapse
|
4
|
Yang HL, Thiyagarajan V, Shen PC, Mathew DC, Lin KY, Liao JW, Hseu YC. Anti-EMT properties of CoQ0 attributed to PI3K/AKT/NFKB/MMP-9 signaling pathway through ROS-mediated apoptosis. J Exp Clin Cancer Res 2019; 38:186. [PMID: 31068208 PMCID: PMC6505074 DOI: 10.1186/s13046-019-1196-x] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 04/25/2019] [Indexed: 01/08/2023]
Abstract
Background Breast cancer is the most prevalent cancer among women. In triple-negative breast cancer (TNBC) cells, a novel quinone derivative, coenzyme Q0 (CoQ0), promotes apoptosis and cell-cycle arrest. This study explored the anti-epithelial–mesenchymal transition (EMT) and antimetastatic attributes of CoQ0 in TNBC (MDA-MB-231). Methods Invasion, as well as MTT assays were conducted. Lipofectamine RNAiMAX was used to transfect cells with β-catenin siRNA. Through Western blotting and RT-PCR, the major signaling pathways’ protein expressions were examined, and the biopsied tumor tissues underwent immunohistochemical and hematoxylin and eosin staining as well as Western blotting. Results CoQ0 (0.5–2 μM) hindered tumor migration, invasion, and progression. Additionally, it caused MMP-2/− 9, uPA, uPAR, and VEGF downregulation. Furthermore, in highly metastatic MDA-MB-231 cells, TIMP-1/2 expression was subsequently upregulated and MMP-9 expression was downregulated. In addition, CoQ0 inhibited metastasis and EMT in TGF-β/TNF-α-stimulated non-tumorigenic MCF-10A cells. Bioluminescence imaging of MDA-MB-231 luciferase–injected live mice demonstrated that CoQ0 significantly inhibited metastasis of the breast cancer to the lungs and inhibited the development of tumors in MDA-MB-231 xenografted nude mice. Silencing of β-catenin with siRNA stimulated CoQ0-inhibited EMT. Western blotting as well as histological analysis established that CoQ0 reduced xenografted tumor development because apoptosis induction, cell-cycle inhibition, E-cadherin upregulation, β-catenin downregulation, and metastasis and EMT regulatory protein modulation were observed. Conclusions CoQ0 inhibited the progression of metastasis as well as EMT (in vitro and in vivo). The described approach has potential in treating human breast cancer metastasis. Electronic supplementary material The online version of this article (10.1186/s13046-019-1196-x) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Hsin-Ling Yang
- Institute of Nutrition, College of Biopharmaceuticals and Food Sciences, China Medical University, Taichung, 40402, Taiwan
| | - Varadharajan Thiyagarajan
- Department of Cosmeceutics, College of Biopharmaceutical and Food Sciences, China Medical University, No. 91, Hsueh-Shih Road, Taichung, 40402, Taiwan
| | - Pei-Chun Shen
- Institute of Nutrition, College of Biopharmaceuticals and Food Sciences, China Medical University, Taichung, 40402, Taiwan
| | - Dony Chacko Mathew
- Institute of Nutrition, College of Biopharmaceuticals and Food Sciences, China Medical University, Taichung, 40402, Taiwan
| | - Kai-Yuan Lin
- Department of Medical Research, Chi-Mei Medical Center, Tainan, 710, Taiwan
| | - Jiunn-Wang Liao
- Graduate Institute of Veterinary Pathology, National Chung Hsing University, Taichung, 40227, Taiwan
| | - You-Cheng Hseu
- Department of Cosmeceutics, College of Biopharmaceutical and Food Sciences, China Medical University, No. 91, Hsueh-Shih Road, Taichung, 40402, Taiwan. .,Department of Health and Nutrition Biotechnology, Asia University, Taichung, 41354, Taiwan. .,Chinese Medicine Research Center, China Medical University, Taichung, 40402, Taiwan. .,Research Center of Chinese Herbal Medicine, China Medical University, Taichung, 40402, Taiwan.
| |
Collapse
|
5
|
Hseu YC, Thiyagarajan V, Tsou HT, Lin KY, Chen HJ, Lin CM, Liao JW, Yang HL. In vitro and in vivo anti-tumor activity of CoQ0 against melanoma cells: inhibition of metastasis and induction of cell-cycle arrest and apoptosis through modulation of Wnt/β-catenin signaling pathways. Oncotarget 2016; 7:22409-26. [PMID: 26968952 DOI: 10.18632/oncotarget.7983] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 02/23/2016] [Indexed: 12/13/2022] Open
Abstract
Coenzyme Q0 (CoQ0, 2,3-dimethoxy-5-methyl-1,4-benzoquinone), a novel quinone derivative, has been shown to modulate cellular redox balance. However, effect of this compound on melanoma remains unclear. This study examined the in vitro or in vivo anti-tumor, apoptosis, and anti-metastasis activities of CoQ0 (0-20 μM) through inhibition of Wnt/β-catenin signaling pathway. CoQ0 exhibits a significant cytotoxic effect on melanoma cell lines (B16F10, B16F1, and A2058), while causing little toxicity toward normal (HaCaT) cells. The suppression of β-catenin was seen with CoQ0 administration accompanied by a decrease in the expression of Wnt/β-catenin transcriptional target c-myc, cyclin D1, and survivin through GSK3β-independent pathway. We found that CoQ0 treatment caused G1 cell-cycle arrest by reducing the levels of cyclin E and CDK4. Furthermore, CoQ0 treatment induced apoptosis through caspase-9/-3 activation, PARP degradation, Bcl-2/Bax dysregulation, and p53 expression. Notably, non- or sub-cytotoxic concentrations of CoQ0 markedly inhibited migration and invasion, accompanied by the down-regulation of MMP-2 and -9, and up-regulation of TIMP-1 and -2 expressions in highly metastatic B16F10 cells. Furthermore, the in vivo study results revealed that CoQ0 treatment inhibited the tumor growth in B16F10 xenografted nude mice. Histological analysis and western blotting confirmed that CoQ0 significantly decreased the xenografted tumor progression as demonstrated by induction of apoptosis, suppression of β-catenin, and inhibition of cell cycle-, apoptotic-, and metastatic-regulatory proteins. The data suggest that CoQ0 unveils a novel mechanism by down-regulating Wnt/β-catenin pathways and could be used as a potential lead compound for melanoma chemotherapy.
Collapse
|
6
|
Hseu YC, Thiyagarajan V, Ou TT, Yang HL. CoQ 0-induced mitochondrial PTP opening triggers apoptosis via ROS-mediated VDAC1 upregulation in HL-60 leukemia cells and suppresses tumor growth in athymic nude mice/xenografted nude mice. Arch Toxicol 2018; 92:301-22. [PMID: 28918503 DOI: 10.1007/s00204-017-2050-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 08/28/2017] [Indexed: 02/08/2023]
Abstract
Coenzyme Q (CoQ) analogs with variable numbers of isoprenoid units have been demonstrated as anticancer and antioxidant/pro-oxidant molecules. This study examined the in vitro and in vivo antitumor and apoptosis activities of CoQ0 (2,3-dimethoxy-5-methyl-1,4-benzoquinone, zero isoprenoid side-chains) through upregulation of the Voltage-dependent anion channel 1 (VDAC1) signaling pathway on human promyelocytic leukemia. CoQ0 (0-40 μg/mL) treatment significantly reduced HL-60 cell viability, and up-regulated mitochondrial VDAC1 expression. CoQ0 treatment triggers intracellular ROS generation, calcium release, ΔΨm collapse and PTP opening in HL-60 cells. CoQ0 treatment induced apoptosis, which was associated with DNA fragmentation, cytochrome c release, caspase-3 and PARP activation, and Bax/Bcl-2 dysregulation. Annexin V-PI staining indicated that CoQ0 promotes late apoptosis. Furthermore, the blockade of CoQ0-induced ROS production by antioxidant NAC pretreatment substantially attenuated CoQ0-induced apoptosis. The activation of p-GSK3β expression, cyclophilin D inhibition, and p53 activation through ROS are involved in CoQ0-induced HL-60 apoptotic cell death. Notably, ROS-independent p38 activation is involved in CoQ0-mediated apoptosis in HL-60 cells. In addition, the silencing of VDAC1 also prevented CoQ0-induced mitochondrial translocation of Bax, activation of caspase-3, and reduction in Bcl-2. Intriguingly, VDAC1 silencing did not prevent ROS production induced by CoQ0, which in turn indicates that CoQ0 induced ROS-mediated VDAC1 and then mitochondrial apoptosis in HL-60 cells. In vivo results revealed that CoQ0 is effective in delaying tumor incidence and reducing the tumor burden in HL-60-xenografted nude mice. Taken together, CoQ0 could be a promising anticancer agent for the treatment of human promyelocytic leukemia through upregulation of VDAC1 signaling pathways.
Collapse
|
7
|
Wang HM, Yang HL, Thiyagarajan V, Huang TH, Huang PJ, Chen SC, Liu JY, Hsu LS, Chang HW, Hseu YC. Coenzyme Q 0 Enhances Ultraviolet B-Induced Apoptosis in Human Estrogen Receptor-Positive Breast (MCF-7) Cancer Cells. Integr Cancer Ther 2016; 16:385-396. [PMID: 27821721 PMCID: PMC5759941 DOI: 10.1177/1534735416673907] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Coenzyme Q0 (CoQ0; 2,3-dimethoxy-5-methyl-1,4-benzoquinone), a major active constituent of Antrodia camphorata, has been shown to inhibit human triple-negative breast cancer (MDA-MB-231) cells through induction of apoptosis and cell-cycle arrest. Ecological studies have suggested a possible association between ultraviolet B (UVB) radiation and reduction in the risk of breast cancer. However, the underlying mechanism of the combination of CoQ0 and UVB in human estrogen receptor–positive breast cancer (MCF-7) remains unclear. In this study, the possible effect of CoQ0 on inducing apoptosis in MCF-7 cells under exposure to low-dose UVB (0.05 J/cm2) has been investigated. CoQ0 treatment (0-35 µM, for 24-72 hours) inhibits moderately the growth of breast cancer MCF-7 cells, and the cell viability was significantly decreased when the cells were pretreated with UVB irradiation. It was noted that there was a remarkable accumulation of subploid cells, the so-called sub-G1 peak, in CoQ0-treated cells by using flow cytometric analysis, which suggests that the viability reduction observed after treatment may result from apoptosis induction in MCF-7 cells. CoQ0 caused an elevation of reactive oxygen species, as indicated by dichlorofluorescein fluorescence, and UVB pretreatment significantly increased CoQ0-induced reactive oxygen species generation in MCF-7 cells. In addition, cells were exposed to CoQ0, and the induction of DNA damage was evaluated by single-cell gel electrophoresis (comet assay). CoQ0-induced DNA damage was remarkably enhanced by UVB pretreatment. Furthermore, CoQ0 induced apoptosis in MCF-7 cells, which was associated with PARP degradation, Bcl-2/Bax dysregulation, and p53 expression as shown by western blot. Collectively, these findings suggest that CoQ0 might be an important supplemental agent for treating patients with breast cancer.
Collapse
Affiliation(s)
- Hui-Min Wang
- 1 National Chung Hsing University, Taichung, Taiwan
| | | | | | | | | | | | - Jer-Yuh Liu
- 2 China Medical University, Taichung, Taiwan
| | - Li-Sung Hsu
- 5 Chung Shan Medical University, Taichung, Taiwan
| | - Hsueh-Wei Chang
- 1 National Chung Hsing University, Taichung, Taiwan.,6 Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - You-Cheng Hseu
- 2 China Medical University, Taichung, Taiwan.,3 Asia University, Taichung, Taiwan
| |
Collapse
|