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Ergosterol depletion under bifonazole treatment induces cell membrane damage and triggers a ROS-mediated mitochondrial apoptosis in Penicillium expansum. Fungal Biol 2021; 126:1-10. [PMID: 34930554 DOI: 10.1016/j.funbio.2021.09.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 08/06/2021] [Accepted: 09/07/2021] [Indexed: 01/02/2023]
Abstract
Penicillium expansum is the causal agent of blue mold in harvested fruits and vegetables during storage and distribution, causing serious economic loss. In this study we seek the action modes of bifonazole against this pathogen. Bifonazole exhibited strong antifungal activity against P. expansum by inhibiting ergosterol synthesis. The ergosterol depletion caused damage to the cell structure and especially cell membrane integrity as observed by SEM and TEM. With increased unsaturated fatty acids contents, the cell membrane viscosity decreases and can no longer effectively maintain the cytoplasm, which ultimately decreases extracellular conductivity, changes intracellular pH and ion homeostasis. Exposure of hyphal cells to bifonazole shows that mitochondrial respiration is inhibited and reactive oxygen species (ROS) levels-including H2O2 and malondialdehyde (MDA) - are significantly increased. The functional impairment of mitochondria and cell membrane eventually cause cell death through intrinsic apoptosis and necroptosis.
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Fernández-Pampín N, Vaquero M, Gil T, Espino G, Fernández D, García B, Busto N. Distinct mechanism of action for antitumoral neutral cyclometalated Pt(II)-complexes bearing antifungal imidazolyl-based drugs. J Inorg Biochem 2021; 226:111663. [PMID: 34801972 DOI: 10.1016/j.jinorgbio.2021.111663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 11/04/2021] [Accepted: 11/05/2021] [Indexed: 12/11/2022]
Abstract
Three neutral Pt(II) complexes containing 1-Methylimidazole and the antifungal imidazolyl drugs Clotrimazole and Bifonazole have been prepared. The general formula of the new derivatives is [Pt(κ2-(C^N)Cl(L)], where C^N stands for ppy = 2-phenylpyridinate, and L = 1-Methylimidazole (MeIm) for [Pt-MeIm]; L = Clotrimazole (CTZ) for [Pt-CTZ] and L = Bifonazole (BFZ) for [Pt-BFZ]). The complexes have been completely characterized in solution and the crystal structures of [Pt-BFZ] and [Pt-CTZ] have been resolved. Complexes [Pt-MeIm] and [Pt-BFZ] present higher cytotoxicity than cisplatin in SW480 (colon adenocarcinoma), A549 (lung adenocarcinoma) and A2780 (ovarian cancer) cell lines. [Pt-MeIm] shows the highest accumulation in A549 cells, in agreement with its inability to interact with serum albumin. By contrast, [Pt-CTZ] and [Pt-BFZ] interact with serum proteins, a fact that reduces their bioavailability. The strongest interaction with bovine serum albumin (BSA) is found for [Pt-BFZ], which is the least internalized inside the cells. All the complexes are able to covalently interact with DNA. The most cytotoxic complexes, [Pt-MeIm] and [Pt-BFZ] induce cellular accumulation in G0/G1 and apoptosis by a similar pathway, probably involving a reactive oxygen species (ROS) generation mechanism. [Pt-BFZ] turns out to be the most efficient complex regarding ROS generation and causes mitochondrial membrane depolarization, whereas [Pt-MeIm] induces the opposite effect, hyperpolarization of the mitochondrial membrane. On the contrary, the least cytotoxic complex, [Pt-CTZ] cannot block the cell cycle or generate ROS and the mechanism by which it induces apoptosis could be a different one.
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Affiliation(s)
- Natalia Fernández-Pampín
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Mónica Vaquero
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Tania Gil
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Gustavo Espino
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Darío Fernández
- Departamento de Ciencias de la Salud, Facultad de Ciencias de la Salud, Universidad de Burgos, Paseo de los Comendadores, s/n, 09001 Burgos, Spain; Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Godoy Cruz 2290, C1425FQB, Buenos Aires, Argentina
| | - Begoña García
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Natalia Busto
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain.
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KAVAKCIOĞLU YARDIMCI B. Imidazole Antifungals: A Review of Their Action Mechanisms on Cancerous Cells. INTERNATIONAL JOURNAL OF SECONDARY METABOLITE 2020. [DOI: 10.21448/ijsm.714310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Chen IS, Chou CT, Liu YY, Yu CC, Liang WZ, Kuo CC, Shieh P, Kuo DH, Chen FA, Jan CR. The investigation of minoxidil-induced [Ca 2+] i rises and non-Ca 2+-triggered cell death in PC3 human prostate cancer cells. J Recept Signal Transduct Res 2016; 37:1-7. [PMID: 27309957 DOI: 10.3109/10799893.2015.1122041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Minoxidil is clinically used to prevent hair loss. However, its effect on Ca2+ homeostasis in prostate cancer cells is unclear. This study explored the effect of minoxidil on cytosolic-free Ca2+ levels ([Ca2+]i) and cell viability in PC3 human prostate cancer cells. Minoxidil at concentrations between 200 and 800 μM evoked [Ca2+]i rises in a concentration-dependent manner. This Ca2+ signal was inhibited by 60% by removal of extracellular Ca2+. Minoxidil-induced Ca2+ influx was confirmed by Mn2+-induced quench of fura-2 fluorescence. Pre-treatment with the protein kinase C (PKC) inhibitor GF109203X, PKC activator phorbol 12-myristate 13 acetate (PMA), nifedipine and SKF96365 inhibited minoxidil-induced Ca2+ signal in Ca2+ containing medium by 60%. Treatment with the endoplasmic reticulum Ca2+ pump inhibitor 2,5-ditert-butylhydroquinone (BHQ) in Ca2+-free medium abolished minoxidil-induced [Ca2+]i rises. Conversely, treatment with minoxidil abolished BHQ-induced [Ca2+]i rises. Inhibition of phospholipase C (PLC) with U73122 abolished minoxidil-evoked [Ca2+]i rises. Overnight treatment with minoxidil killed cells at concentrations of 200-600 μM in a concentration-dependent fashion. Chelation of cytosolic Ca2+ with 1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid/AM (BAPTA/AM) did not prevent minoxidil's cytotoxicity. Together, in PC3 cells, minoxidil induced [Ca2+]i rises that involved Ca2+ entry through PKC-regulated store-operated Ca2+ channels and PLC-dependent Ca2+ release from the endoplasmic reticulum. Minoxidil-induced cytotoxicity in a Ca2+-independent manner.
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Affiliation(s)
- I-Shu Chen
- a Department of Surgery , Kaohsiung Veterans General Hospital , Kaohsiung , Taiwan
| | - Chiang-Ting Chou
- b Department of Nursing , Division of Basic Medical Sciences, Chang Gung University of Science and Technology , Chia-Yi , Taiwan.,c Chronic Diseases and Health Promotion Research Center, Chang Gung University of Science and Technology , Chia-Yi , Taiwan
| | - Yuan-Yuarn Liu
- a Department of Surgery , Kaohsiung Veterans General Hospital , Kaohsiung , Taiwan
| | - Chia-Cheng Yu
- a Department of Surgery , Kaohsiung Veterans General Hospital , Kaohsiung , Taiwan
| | - Wei-Zhe Liang
- d Department of Medical Education and Research , Kaohsiung Veterans General Hospital , Kaohsiung , Taiwan
| | - Chun-Chi Kuo
- e Department of Nursing , Tzu Hui Institute of Technology , Pingtung , Taiwan , and
| | - Pochuen Shieh
- f Department of Pharmacy , Tajen University , Pingtung , Taiwan
| | - Daih-Huang Kuo
- f Department of Pharmacy , Tajen University , Pingtung , Taiwan
| | - Fu-An Chen
- f Department of Pharmacy , Tajen University , Pingtung , Taiwan
| | - Chung-Ren Jan
- d Department of Medical Education and Research , Kaohsiung Veterans General Hospital , Kaohsiung , Taiwan
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