1
|
de la Harpe A, Beukes N, Frost CL. CBD activation of TRPV1 induces oxidative signaling and subsequent ER stress in breast cancer cell lines. Biotechnol Appl Biochem 2021; 69:420-430. [PMID: 33604949 DOI: 10.1002/bab.2119] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Endoplasmic reticulum (ER) stress is an imbalance between the protein-folding load and capacity of ER. It can be induced by various physiological conditions, activating the unfolded protein response (UPR) to re-establish homeostasis, promoting cell survival. Under severe or chronic stress, apoptosis is induced. Normal cells generally do not experience continuous ER stress induction. The stressful conditions experienced in the tumor microenvironment facilitate chronic ER stress and UPR activation, which plays a pivotal role in tumour survival. Exacerbation of pre-existing ER stress can trigger cancer cell death, with a minimal effect on normal cells. Current literature suggests that cannabinoid treatment may induce cancer cell death via ER stress; however, little is known about the mechanisms of induction. This study proposed that cannabidiol (CBD) mechanism occurred through the influx of Ca2+ via the TRPV1 receptor, and increasing reactive oxygen species (ROS) production affects protein folding and induces ER stress. ER stress was induced, and detection and quantification were completed using Thioflavin T staining and GRP78 by western blot analysis. The effect of cannabinoid treatment on ROS production and Ca2+ influx was measured. CBD was the most potent ER stress inducer, significantly increasing Ca2+ and ROS accumulation. Concomitant treatment with CBD and an antioxidant significantly increased cell viability and decreased ER stress induction in the MCF7 cell line. Concomitant treatment with a TRPV1 antagonist increased viability in this cell line. In conclusion, the data suggested that CBD induced ER stress via Ca2+ influx through the TRPV1 receptor, thereby elevating intracellular ROS levels and disrupting protein folding.
Collapse
Affiliation(s)
- Amy de la Harpe
- Department of Biochemistry and Microbiology, Nelson Mandela University, Port Elizabeth, South Africa
| | - Natasha Beukes
- Department of Biochemistry and Microbiology, Nelson Mandela University, Port Elizabeth, South Africa
| | - Carminita L Frost
- Department of Biochemistry and Microbiology, Nelson Mandela University, Port Elizabeth, South Africa
| |
Collapse
|
2
|
Walker OS, Gurm H, Sharma R, Verma N, May LL, Raha S. Delta-9-tetrahydrocannabinol inhibits invasion of HTR8/SVneo human extravillous trophoblast cells and negatively impacts mitochondrial function. Sci Rep 2021; 11:4029. [PMID: 33597628 PMCID: PMC7889882 DOI: 10.1038/s41598-021-83563-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 01/29/2021] [Indexed: 01/31/2023] Open
Abstract
Prenatal cannabis use is a significant problem and poses important health risks for the developing fetus. The molecular mechanisms underlying these changes are not fully elucidated but are thought to be attributed to delta-9-tetrahydrocannabinol (THC), the main bioactive constituent of cannabis. It has been reported that THC may target the mitochondria in several tissue types, including placental tissue and trophoblast cell lines, and alter their function. In the present study, in response to 48-h THC treatment of the human extravillous trophoblast cell line HTR8/SVneo, we demonstrate that cell proliferation and invasion are significantly reduced. We further demonstrate THC-treatment elevated levels of cellular reactive oxygen species and markers of lipid damage. This was accompanied by evidence of increased mitochondrial fission. We also observed increased expression of cellular stress markers, HSP70 and HSP60, following exposure to THC. These effects were coincident with reduced mitochondrial respiratory function and a decrease in mitochondrial membrane potential. Taken together, our results suggest that THC can induce mitochondrial dysfunction and reduce trophoblast invasion; outcomes that have been previously linked to poor placentation. We also demonstrate that these changes in HTR8/SVneo biology may be variably mediated by cannabinoid receptors CB1 and CB2.
Collapse
Affiliation(s)
- O’Llenecia S. Walker
- grid.25073.330000 0004 1936 8227Graduate Program in Medical Sciences, Department of Pediatrics, McMaster University, HSC 4H7, Hamilton, ON L8S 4K1 Canada
| | - Harmeet Gurm
- grid.25073.330000 0004 1936 8227Graduate Program in Medical Sciences, Department of Pediatrics, McMaster University, HSC 4H7, Hamilton, ON L8S 4K1 Canada
| | - Reeti Sharma
- grid.25073.330000 0004 1936 8227 Department of Pediatrics, McMaster University, HSC 4H7, Hamilton, ON L8S 4K1 Canada
| | - Navkiran Verma
- grid.25073.330000 0004 1936 8227 Department of Pediatrics, McMaster University, HSC 4H7, Hamilton, ON L8S 4K1 Canada
| | - Linda L. May
- grid.25073.330000 0004 1936 8227 Department of Pediatrics, McMaster University, HSC 4H7, Hamilton, ON L8S 4K1 Canada
| | - Sandeep Raha
- grid.25073.330000 0004 1936 8227Graduate Program in Medical Sciences, Department of Pediatrics, McMaster University, HSC 4H7, Hamilton, ON L8S 4K1 Canada
| |
Collapse
|
3
|
Lowe H, Steele B, Bryant J, Fouad E, Toyang N, Ngwa W. Antiviral Activity of Jamaican Medicinal Plants and Isolated Bioactive Compounds. Molecules 2021; 26:molecules26030607. [PMID: 33503834 PMCID: PMC7865499 DOI: 10.3390/molecules26030607] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/26/2020] [Accepted: 12/29/2020] [Indexed: 01/07/2023] Open
Abstract
Plants have had historical significance in medicine since the beginning of civilization. The oldest medical pharmacopeias of the African, Arabian, and Asian countries solely utilize plants and herbs to treat pain, oral diseases, skin diseases, microbial infections, multiple types of cancers, reproductive disorders among a myriad of other ailments. The World Health Organization (WHO) estimates that over 65% of the world population solely utilize botanical preparations as medicine. Due to the abundance of plants, plant-derived medicines are more readily accessible, affordable, convenient, and have safer side-effect profiles than synthetic drugs. Plant-based decoctions have been a significant part of Jamaican traditional folklore medicine. Jamaica is of particular interest because it has approximately 52% of the established medicinal plants that exist on earth. This makes the island particularly welcoming for rigorous scientific research on the medicinal value of plants and the development of phytomedicine thereof. Viral infections caused by the human immunodeficiency virus types 1 and 2 (HIV-1 and HIV-2), hepatitis virus B and C, influenza A virus, and the severe acute respiratory syndrome coronavirus 2 (SARS CoV-2) present a significant global burden. This is a review of some important Jamaican medicinal plants, with particular reference to their antiviral activity.
Collapse
Affiliation(s)
- Henry Lowe
- Biotech R & D Institute, University of the West Indies, Mona, 99999 Kingston, Jamaica; (H.L.); (J.B.)
- Vilotos Pharmaceuticals Inc., Baltimore, MD 21202, USA;
- Flavocure Biotech Inc., Baltimore, MD 21202, USA
- Institute of Human Virology (IHV), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Blair Steele
- Biotech R & D Institute, University of the West Indies, Mona, 99999 Kingston, Jamaica; (H.L.); (J.B.)
- Correspondence: ; Tel.: +1-876-926-8502
| | - Joseph Bryant
- Biotech R & D Institute, University of the West Indies, Mona, 99999 Kingston, Jamaica; (H.L.); (J.B.)
| | - Emadelden Fouad
- Physics Department, Florida Polytechnic Institute, Lakeland, FL 33805, USA; (E.F.); (W.N.)
| | - Ngeh Toyang
- Vilotos Pharmaceuticals Inc., Baltimore, MD 21202, USA;
- Flavocure Biotech Inc., Baltimore, MD 21202, USA
| | - Wilfred Ngwa
- Physics Department, Florida Polytechnic Institute, Lakeland, FL 33805, USA; (E.F.); (W.N.)
- Brigham and Women’s Hospital, Dana-Faber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
| |
Collapse
|