1
|
Li X, Zhang W, Shu Y, Huo R, Zheng C, Qi Q, Fu P, Sun J, Wang Y, Wang Y, Lu J, Zhao X, Yin G, Wang Q, Hong J. Biparatopic anti-PCSK9 antibody enhances the LDL-uptake in HepG2 cells. Sci Rep 2024; 14:15331. [PMID: 38961200 PMCID: PMC11222478 DOI: 10.1038/s41598-024-66290-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Accepted: 07/01/2024] [Indexed: 07/05/2024] Open
Abstract
Proprotein convertase subtilisin/kexin type 9 (PCSK9) has emerged as a promising therapeutic target to reduce lipids. In 2020, we reported a chimeric camelid-human heavy chain antibody VHH-B11-Fc targeting PCSK9. Recently, it was verified that VHH-B11 binds one linear epitope in the PCSK9 hinge region. To enhance its druggability, we have developed a novel biparatopic B11-H2-Fc Ab herein. Thereinto, surface plasmon resonance (SPR) confirmed the epitope differences in binding-PCSK9 among VHH-B11, VHH-H2 and the approved Repatha. Additionally, SPR revealed the B11-H2-Fc exhibits an avidity of approximately 0.036 nM for PCSK9, representing a considerable increase compared to VHH-B11-Fc (~ 0.69 nM). Moreover, we found the Repatha and B11-H2-Fc exhibited > 95% PCSK9 inhibition efficiency compared to approximately 48% for the VHH-Fc at 7.4 nM (P < 0.0005). Further, we verified its biological activity using the human hepatoma cells G2 model, where the B11-H2-Fc exhibited almost 100% efficiency in PCSK9 inhibition at only 0.75 μM. The immunoblotting results of low-density lipoprotein cholesterol (LDL-c) uptake assay also demonstrated the excellent performance of B11-H2-Fc on recovering the LDL-c receptor (LDLR), as strong as the Repatha (P > 0.05). These findings provide the first evidence of the efficacy of a novel Ab targeting PCSK9 in the field of lipid-lowering drugs.
Collapse
Affiliation(s)
- Xinyang Li
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China.
| | - Wei Zhang
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China
| | - Yu Shu
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China
| | - Rui Huo
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China
| | - Chengyang Zheng
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China
| | - Qi Qi
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China
| | - Pengfei Fu
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China
| | - Jie Sun
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China
| | - Yuhuan Wang
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China
| | - Yan Wang
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China
| | - Juxu Lu
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China
| | - Xiangjie Zhao
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China
| | - Guoyou Yin
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China.
| | - Qingqing Wang
- Employment and Business Startup Service Center, Henan University of Urban Construction, Ping Dingshan, 467036, China.
| | - Jun Hong
- College of Life Science and Engineering, Henan University of Urban Construction, Ping Dingshan, 467036, China.
| |
Collapse
|
2
|
El Hussein MT, Sharma A, Parmar K, Shelat K. Pharmacotherapeutics for dyslipidemia management. Nurse Pract 2023; 48:36-47. [PMID: 37227314 DOI: 10.1097/01.npr.0000000000000059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
ABSTRACT Effective management of dyslipidemia is of paramount importance to prevent cardiovascular (CV) complications. Using current clinical practice guidelines is recommended to correct lipid levels and prevent further pathologic processes. This article presents an overview of treatment options for patients with dyslipidemia and CV disease, with a special focus on the following drug classes: HMG-CoA reductase inhibitors (also called statins), cholesterol absorption inhibitors (ezetimibe), bile acid sequestrants, fibrates, icosapent ethyl, and PCSK9 inhibitors.
Collapse
|
3
|
Dayar E, Pechanova O. Targeted Strategy in Lipid-Lowering Therapy. Biomedicines 2022; 10:1090. [PMID: 35625827 PMCID: PMC9138651 DOI: 10.3390/biomedicines10051090] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/02/2022] [Accepted: 05/03/2022] [Indexed: 01/25/2023] Open
Abstract
Dyslipidemia is characterized by a diminished lipid profile, including increased level of total cholesterol and low-density lipoprotein cholesterol (LDL-c) and reduced level of high-density lipoprotein cholesterol (HDL-c). Lipid-lowering agents represent an efficient tool for the prevention or reduction of progression of atherosclerosis, coronary heart diseases and metabolic syndrome. Statins, ezetimibe, and recently proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitors are the most effective and used drugs in clinical lipid-lowering therapy. These drugs are mainly aimed to lower cholesterol levels by different mechanisms of actions. Statins, the agents of the first-line therapy-known as 3-hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase inhibitors-suppress the liver cholesterol synthesis. Ezetimibe as the second-line therapy can decrease cholesterol by inhibiting cholesterol absorption. Finally, the PCSK9 inhibitors act as an inducer of LDL excretion. In spite of their beneficial lipid-lowering properties, many patients suffer from their serious side effects, route of administration, or unsatisfactory physicochemical characteristics. Clinical demand for dose reduction and the improvement of bioavailability as well as pharmacodynamic and pharmacokinetic profile has resulted in the development of a new targeted therapy that includes nanoparticle carriers, emulsions or vaccination often associated with another more subtle form of administration. Targeted therapy aims to exert a more potent drug profile with lipid-lowering properties either alone or in mutual combination to potentiate their beneficial effects. This review describes the most effective lipid-lowering drugs, their favorable and adverse effects, as well as targeted therapy and alternative treatments to help reduce or prevent atherosclerotic processes and cardiovascular events.
Collapse
Affiliation(s)
| | - Olga Pechanova
- Institute of Normal and Pathological Physiology, Centre of Experimental Medicine, Slovak Academy of Sciences, Sienkiewiczova 1, 813 71 Bratislava, Slovakia;
| |
Collapse
|
4
|
Pearson GJ, Thanassoulis G, Anderson TJ, Barry AR, Couture P, Dayan N, Francis GA, Genest J, Grégoire J, Grover SA, Gupta M, Hegele RA, Lau D, Leiter LA, Leung AA, Lonn E, Mancini GBJ, Manjoo P, McPherson R, Ngui D, Piché ME, Poirier P, Sievenpiper J, Stone J, Ward R, Wray W. 2021 Canadian Cardiovascular Society Guidelines for the Management of Dyslipidemia for the Prevention of Cardiovascular Disease in Adults. Can J Cardiol 2021; 37:1129-1150. [PMID: 33781847 DOI: 10.1016/j.cjca.2021.03.016] [Citation(s) in RCA: 393] [Impact Index Per Article: 131.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 03/16/2021] [Indexed: 12/27/2022] Open
Abstract
The 2021 guidelines primary panel selected clinically relevant questions and produced updated recommendations, on the basis of important new findings that have emerged since the 2016 guidelines. In patients with clinical atherosclerosis, abdominal aortic aneurysm, most patients with diabetes or chronic kidney disease, and those with low-density lipoprotein cholesterol ≥ 5 mmol/L, statin therapy continues to be recommended. We have introduced the concept of lipid/lipoprotein treatment thresholds for intensifying lipid-lowering therapy with nonstatin agents, and have identified the secondary prevention patients who have been shown to derive the largest benefit from intensification of therapy with these agents. For all other patients, we emphasize risk assessment linked to lipid/lipoprotein evaluation to optimize clinical decision-making. Lipoprotein(a) measurement is now recommended once in a patient's lifetime, as part of initial lipid screening to assess cardiovascular risk. For any patient with triglycerides ˃ 1.5 mmol/L, either non-high-density lipoprotein cholesterol or apolipoprotein B are the preferred lipid parameter for screening, rather than low-density lipoprotein cholesterol. We provide updated recommendations regarding the role of coronary artery calcium scoring as a clinical decision tool to aid the decision to initiate statin therapy. There are new recommendations on the preventative care of women with hypertensive disorders of pregnancy. Health behaviour modification, including regular exercise and a heart-healthy diet, remain the cornerstone of cardiovascular disease prevention. These guidelines are intended to provide a platform for meaningful conversation and shared-decision making between patient and care provider, so that individual decisions can be made for risk screening, assessment, and treatment.
Collapse
Affiliation(s)
- Glen J Pearson
- Faculty of Medicine and Dentistry, University of Alberta, Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada.
| | - George Thanassoulis
- McGill University Health Center, McGill University, Montréal, Québec, Canada
| | - Todd J Anderson
- Cumming School of Medicine, University of Calgary, Libin Cardiovascular Institute, Calgary, Alberta, Canada
| | - Arden R Barry
- University of British Columbia, Vancouver, British Columbia, Canada
| | - Patrick Couture
- Centre Hospitalier Universitaire de Québec, Université Laval, Québec, Québec, Canada
| | | | - Gordon A Francis
- Centre for Heart Lung Innovation, Providence Health Care Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jacques Genest
- McGill University Health Center, McGill University, Montréal, Québec, Canada
| | - Jean Grégoire
- Institut de Cardiologie de Montréal, Université de Montréal, Montréal, Québec, Canada
| | | | - Milan Gupta
- Department of Medicine, McMaster University, Hamilton, Ontario, and Canadian Collaborative Research Network, Brampton, Ontario, Canada
| | - Robert A Hegele
- Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - David Lau
- Department of Medicine, Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Lawrence A Leiter
- Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Alexander A Leung
- Departments of Medicine and Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Eva Lonn
- Department of Medicine and Population Health Research Institute, McMaster University and Hamilton Health Sciences, Hamilton, Ontario, Canada
| | - G B John Mancini
- University of British Columbia; Department of Medicine, Division of Cardiology, Vancouver, British Columbia, Canada
| | - Priya Manjoo
- University of British Columbia, Victoria, British Columbia, Canada
| | - Ruth McPherson
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Daniel Ngui
- University of British Columbia, St Paul's Hospital, Vancouver, British Columbia, Canada
| | - Marie-Eve Piché
- Institut Universitaire de Cardiologie et de Pneumologie de Québec-Université Laval, Québec City, Québec, Canada
| | - Paul Poirier
- Institut Universitaire de Cardiologie et de Pneumologie de Québec-Université Laval, Québec City, Québec, Canada
| | - John Sievenpiper
- Department of Medicine and Li Ka Shing Knowledge Institute, St Michael's Hospital and Departments of Nutritional Sciences and Medicine, University of Toronto, Toronto, Ontario, Canada
| | - James Stone
- University of Calgary, Libin Cardiovascular Institute, Calgary, Alberta, Canada
| | - Rick Ward
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Wendy Wray
- McGill University Health Centre, Montréal, Québec, Canada
| |
Collapse
|
5
|
Gao WY, Chen PY, Chen SF, Wu MJ, Chang HY, Yen JH. Pinostrobin Inhibits Proprotein Convertase Subtilisin/Kexin-type 9 (PCSK9) Gene Expression through the Modulation of FoxO3a Protein in HepG2 Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6083-6093. [PMID: 29862818 DOI: 10.1021/acs.jafc.8b02559] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Pinostrobin, a flavonoid phytochemical found in variety of plants, has been demonstrated to possess numerous bioactivities such as antioxidant, anti-inflammatory, anticancer, and neuroprotective properties. The aim of this study was to investigate the hypocholesterolemic effect of pinostrobin on the regulation of the gene expression of PCSK9 and its underlying mechanisms in hepatic cells. We found that pinostrobin (20 and 40 μM) significantly inhibited the PCSK9 promoter activity from 1.00 ± 0.16 (fold) to 0.85 ± 0.06 and 0.54 ± 0.05, respectively, as well as the suppression of PCSK9 mRNA expression from 1.00 ± 0.11 (fold) to 0.81 ± 0.07 and 0.58 ± 0.07, respectively, in HepG2 cells. Pinostrobin significantly reduced the mature form of the PCSK9 protein, inhibited the catalytic activity of PCSK9, and increased the protein level of LDLR and the LDL uptake activity in HepG2 cells. We further demonstrated that pinostrobin markedly increased the level of nuclear forkhead box O3a (FoxO3a) protein, enhanced FoxO3a/PCSK9 promoter complexes formation, and attenuated the promoter binding capacity of nuclear HNF-1α. The knockdown of FoxO3a in HepG2 cells by small interference RNA (siRNA) abolished the pinostrobin-mediated PCSK9 reduction. Finally, we demonstrated that pinostrobin attenuated simvastatin-induced PCSK9 overexpression in HepG2 cells. Our current findings reveal that pinostrobin is a PCSK9 inhibitor and down-regulates the PCSK9 gene expression through the up-regulation of the FoxO3a level in hepatic cells. Pinostrobin with potential PCSK9 inhibitory activity may serve as a novel agent for cholesterol regulation and lipid management.
Collapse
Affiliation(s)
| | - Pei-Yi Chen
- Center of Medical Genetics , Buddhist Tzu Chi General Hospital , Hualien 970 , Taiwan
| | | | - Ming-Jiuan Wu
- Department of Biotechnology , Chia-Nan University of Pharmacy and Science , Tainan 717 , Taiwan
| | | | | |
Collapse
|
6
|
Katsiki N, Giannoukas AD, Athyros VG, Mikhailidis DP. Lipid-lowering treatment in peripheral artery disease. Curr Opin Pharmacol 2018; 39:19-26. [DOI: 10.1016/j.coph.2018.01.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/14/2018] [Accepted: 01/19/2018] [Indexed: 12/19/2022]
|
7
|
Ruel I, Aljenedil S, Sadri I, de Varennes É, Hegele RA, Couture P, Bergeron J, Wanneh E, Baass A, Dufour R, Gaudet D, Brisson D, Brunham LR, Francis GA, Cermakova L, Brophy JM, Ryomoto A, Mancini GBJ, Genest J. Imputation of Baseline LDL Cholesterol Concentration in Patients with Familial Hypercholesterolemia on Statins or Ezetimibe. Clin Chem 2018; 64:355-362. [DOI: 10.1373/clinchem.2017.279422] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 08/31/2017] [Indexed: 01/27/2023]
Abstract
Abstract
BACKGROUND
Familial hypercholesterolemia (FH) is the most frequent genetic disorder seen clinically and is characterized by increased LDL cholesterol (LDL-C) (>95th percentile), family history of increased LDL-C, premature atherosclerotic cardiovascular disease (ASCVD) in the patient or in first-degree relatives, presence of tendinous xanthomas or premature corneal arcus, or presence of a pathogenic mutation in the LDLR, PCSK9, or APOB genes. A diagnosis of FH has important clinical implications with respect to lifelong risk of ASCVD and requirement for intensive pharmacological therapy. The concentration of baseline LDL-C (untreated) is essential for the diagnosis of FH but is often not available because the individual is already on statin therapy.
METHODS
To validate a new algorithm to impute baseline LDL-C, we examined 1297 patients. The baseline LDL-C was compared with the imputed baseline obtained within 18 months of the initiation of therapy. We compared the percent reduction in LDL-C on treatment from baseline with the published percent reductions.
RESULTS
After eliminating individuals with missing data, nonstandard doses of statins, or medications other than statins or ezetimibe, we provide data on 951 patients. The mean ± SE baseline LDL-C was 243.0 (2.2) mg/dL [6.28 (0.06) mmol/L], and the mean ± SE imputed baseline LDL-C was 244.2 (2.6) mg/dL [6.31 (0.07) mmol/L] (P = 0.48). There was no difference in response according to the patient's sex or in percent reduction between observed and expected for individual doses or types of statin or ezetimibe.
CONCLUSIONS
We provide a validated estimation of baseline LDL-C for patients with FH that may help clinicians in making a diagnosis.
Collapse
Affiliation(s)
- Isabelle Ruel
- Research Institute of the McGill University Health Centre, Royal Victoria Hospital, Montreal, QC, Canada
| | - Sumayah Aljenedil
- Research Institute of the McGill University Health Centre, Royal Victoria Hospital, Montreal, QC, Canada
| | - Iman Sadri
- Research Institute of the McGill University Health Centre, Royal Victoria Hospital, Montreal, QC, Canada
| | - Émilie de Varennes
- Research Institute of the McGill University Health Centre, Royal Victoria Hospital, Montreal, QC, Canada
| | - Robert A Hegele
- Departments of Medicine and Biochemistry, Schulich School of Medicine and Robarts Research Institute, Western University, London, ON, Canada
| | - Patrick Couture
- Lipid Research Centre, CHU de Québec-Université Laval, Quebec City, QC, Canada
| | - Jean Bergeron
- Lipid Research Centre, CHU de Québec-Université Laval, Quebec City, QC, Canada
| | - Eric Wanneh
- Division of Experimental Medicine, Department of Medicine, McGill University, Montreal, QC, Canada
| | - Alexis Baass
- Division of Experimental Medicine, Department of Medicine, McGill University, Montreal, QC, Canada
- Nutrition, Metabolism, and Atherosclerosis Clinic, Institut de recherches cliniques de Montréal, QC, Canada
- Division of Medical Biochemistry, Department of Medicine, McGill University, QC, Canada
| | - Robert Dufour
- Department of Nutrition, Université de Montréal, Montreal, QC, Canada
| | - Daniel Gaudet
- Lipidology Unit, Community Genomic Medicine Centre and ECOGENE-21, Department of Medicine, Université de Montréal, Saguenay, QC, Canada
| | - Diane Brisson
- Lipidology Unit, Community Genomic Medicine Centre and ECOGENE-21, Department of Medicine, Université de Montréal, Saguenay, QC, Canada
| | - Liam R Brunham
- Healthy Heart Program Prevention Clinic, St. Paul's Hospital, Vancouver, BC, Canada
- Department of Medicine, University of British Columbia, Vancouver, BC, Canada
- Centre for Heart Lung Innovation, Providence Health Care Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Gordon A Francis
- Healthy Heart Program Prevention Clinic, St. Paul's Hospital, Vancouver, BC, Canada
- Department of Medicine, University of British Columbia, Vancouver, BC, Canada
- Centre for Heart Lung Innovation, Providence Health Care Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Lubomira Cermakova
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - James M Brophy
- McGill University, Royal Victoria Hospital, Montreal, QC, Canada
| | - Arnold Ryomoto
- Department of Medicine, Division of Cardiology, University of British Columbia, Vancouver, BC, Canada
| | - G B John Mancini
- Department of Medicine, Division of Cardiology, University of British Columbia, Vancouver, BC, Canada
| | - Jacques Genest
- Research Institute of the McGill University Health Centre, Royal Victoria Hospital, Montreal, QC, Canada
| |
Collapse
|
8
|
Merchán V. A. Propuesta personal de actualización para el tratamiento de la hipercolesterolemia en Colombia. REVISTA COLOMBIANA DE CARDIOLOGÍA 2017. [DOI: 10.1016/j.rccar.2017.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
|
9
|
Merchán V. A. Prólogo. REVISTA COLOMBIANA DE CARDIOLOGÍA 2017. [DOI: 10.1016/j.rccar.2017.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
|
10
|
Klein-Szanto AJ, Bassi DE. Proprotein convertase inhibition: Paralyzing the cell's master switches. Biochem Pharmacol 2017; 140:8-15. [PMID: 28456517 DOI: 10.1016/j.bcp.2017.04.027] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 04/25/2017] [Indexed: 12/18/2022]
Abstract
Proprotein convertases are serine proteases responsible for the cleavage and subsequent activation of protein substrates, many of them relevant for the development of an ample variety of diseases. Seven of the PCs, including furin and PACE4, recognize and hydrolyze the C-terminal end of the general sequence RXRR/KXR, whereas PCSK-9 recognizes a series of non-basic amino acids. In some systems, PC-mediated substrate activation results in the development of pathological processes, such as cancer, endocrinopathies, and cardiovascular and infectious diseases. After establishing PCs as relevant contributors to disease processes, research efforts were directed towards the development of inhibition strategies, including small and large molecules, anti-sense therapies, and antibody-based therapies. Most of these inhibitors mimic the consensus sequence of PCs, blocking the active site in a competitive manner. The most promising inhibitors were designed as bioengineered proteins; however, some non-protein and peptidomimetic agents have also proved to be effective. These efforts led to the design of pre-clinical studies and clinical trials utilizing inhibitors to PCs. Although the initial studies were performed using non-selective PCs inhibitors, such as CMK, the search for more specific, and compartmentalized selective inhibitors resulted in specific activities ascribed to some, but not all of the PCs. For instance, PACE4 inhibitors were effective in decreasing prostate cancer cell proliferation, and neovascularization. Decreased metastatic ovarian cancer utilizing furin inhibitors represents one of the major endeavors, currently in a phase II trial stage. Antibodies targeting PCSK-9 decreased significantly the levels of HDL-cholesterol, in a phase III trial. The study of Proprotein convertases has reached a stage of maturity. New strategies based on the alteration of their activity at the cellular and clinical level represent a promising experimental pharmacology field. The development of allosteric inhibitors, or specific agents directed against individual PCs is one of the challenges to be unraveled in the future.
Collapse
Affiliation(s)
| | - Daniel E Bassi
- Fox Chase Cancer Center, 333 Cotman Ave, Philadelphia 19111, USA.
| |
Collapse
|
11
|
Zhou L, Hussain MM. Human MicroRNA-548p Decreases Hepatic Apolipoprotein B Secretion and Lipid Synthesis. Arterioscler Thromb Vasc Biol 2017; 37:786-793. [PMID: 28336556 DOI: 10.1161/atvbaha.117.309247] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Accepted: 03/10/2017] [Indexed: 12/31/2022]
Abstract
OBJECTIVE MicroRNAs (miRs) play important regulatory roles in lipid metabolism. Apolipoprotein B (ApoB), as the only essential scaffolding protein in the assembly of very-low-density lipoproteins, is a target to treat hyperlipidemia and atherosclerosis. We aimed to find out miRs that reduce apoB expression. APPROACH AND RESULTS Bioinformatic analyses predicted that hsa-miR-548p can interact with apoB mRNA. MiR-548p or control miR was transfected in human and mouse liver cells to test its role in regulating apoB secretion and mRNA expression levels. Site-directed mutagenesis was used to identify the interacting site of miR-548p in human apoB 3'-untranslated region. Fatty acid oxidation and lipid syntheses were examined in miR-548p overexpressing cells to investigate its function in lipid metabolism. We observed that miR-548p significantly reduces apoB secretion from human hepatoma cells and primary hepatocytes. Mechanistic studies showed that miR-548p interacts with the 3'-untranslated region of human apoB mRNA to enhance post-transcriptional degradation. Bioinformatic algorithms suggested 2 potential binding sites of miR-548p on human apoB mRNA. Site-directed mutagenesis studies revealed that miR-548p targets site I involving both seed and supplementary sequences. MiR-548p had no effect on fatty acid oxidation but significantly decreased lipid synthesis in human hepatoma cells by reducing HMGCR (3-hydroxy-3-methylglutaryl-coenzyme A reductase) and ACSL4 (Acyl-CoA synthetase long-chain family member 4) enzymes involved in cholesterol and fatty acid synthesis. In summary, miR-548p reduces lipoprotein production and lipid synthesis by reducing expression of different genes in human liver cells. CONCLUSIONS These studies suggest that miR-548p regulates apoB secretion by targeting mRNA. It is likely that it could be useful in treating atherosclerosis, hyperlipidemia, and hepatosteatosis.
Collapse
Affiliation(s)
- Liye Zhou
- From the School of Graduate Studies, Molecular and Cell Biology Program (L.Z.), and Department of Cell Biology, SUNY Downstate Medical Center, Brooklyn, New York (L.Z., M.M.H.); Diabetes and Obesity Research Center, Winthrop University Hospital, Mineola, New York (M.M.H.); and Department of Veterans Affairs, New York Harbor Healthcare System, Brooklyn (M.M.H.)
| | - M Mahmood Hussain
- From the School of Graduate Studies, Molecular and Cell Biology Program (L.Z.), and Department of Cell Biology, SUNY Downstate Medical Center, Brooklyn, New York (L.Z., M.M.H.); Diabetes and Obesity Research Center, Winthrop University Hospital, Mineola, New York (M.M.H.); and Department of Veterans Affairs, New York Harbor Healthcare System, Brooklyn (M.M.H.).
| |
Collapse
|
12
|
Banach M, Rizzo M, Nikolic D, Howard G, Howard V, Mikhailidis D. Intensive LDL-cholesterol lowering therapy and neurocognitive function. Pharmacol Ther 2017; 170:181-191. [DOI: 10.1016/j.pharmthera.2016.11.001] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
13
|
Calabrese V, Giordano J, Signorile A, Laura Ontario M, Castorina S, De Pasquale C, Eckert G, Calabrese EJ. Major pathogenic mechanisms in vascular dementia: Roles of cellular stress response and hormesis in neuroprotection. J Neurosci Res 2016; 94:1588-1603. [PMID: 27662637 DOI: 10.1002/jnr.23925] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 08/25/2016] [Accepted: 08/25/2016] [Indexed: 12/18/2022]
Abstract
Vascular dementia (VaD), considered the second most common cause of cognitive impairment after Alzheimer disease in the elderly, involves the impairment of memory and cognitive function as a consequence of cerebrovascular disease. Chronic cerebral hypoperfusion is a common pathophysiological condition frequently occurring in VaD. It is generally associated with neurovascular degeneration, in which neuronal damage and blood-brain barrier alterations coexist and evoke beta-amyloid-induced oxidative and nitrosative stress, mitochondrial dysfunction, and inflammasome- promoted neuroinflammation, which contribute to and exacerbate the course of disease. Vascular cognitive impairment comprises a heterogeneous group of cognitive disorders of various severity and types that share a presumed vascular etiology. The present study reviews major pathogenic factors involved in VaD, highlighting the relevance of cerebrocellular stress and hormetic responses to neurovascular insult, and addresses these mechanisms as potentially viable and valuable as foci of novel neuroprotective methods to mitigate or prevent VaD. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Vittorio Calabrese
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy.
| | - James Giordano
- Departments of Neurology and Biochemistry and Neuroethics Studies Program, Pellegrino Center for Clinical Bioethics, Georgetown University Medical Center, Washington, DC
| | - Anna Signorile
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari, Bari, Italy
| | - Maria Laura Ontario
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - Sergio Castorina
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - Concetta De Pasquale
- Department of Medical, Surgical Sciences and Advanced Technologies, University of Catania, Italy
| | - Gunter Eckert
- Institute of Nutrition Sciences, Justus-Liebig-University of Giessen, Giessen, Germany
| | - Edward J Calabrese
- Department of Environmental Health Sciences, University of Massachusetts, Amherst, Amherst, Massachusetts
| |
Collapse
|