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Leslie AR, Ning S, Armstrong CM, D’Abronzo LS, Sharifi M, Schaaf ZA, Lou W, Liu C, Evans CP, Lombard AP, Gao AC. IGFBP3 promotes resistance to Olaparib via modulating EGFR signaling in advanced prostate cancer. iScience 2024; 27:108984. [PMID: 38327800 PMCID: PMC10847745 DOI: 10.1016/j.isci.2024.108984] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 11/07/2023] [Accepted: 01/17/2024] [Indexed: 02/09/2024] Open
Abstract
Olaparib is a pioneering PARP inhibitor (PARPi) approved for treating castration-resistant prostate cancer (CRPC) tumors harboring DNA repair defects, but clinical resistance has been documented. To study acquired resistance, we developed Olaparib-resistant (OlapR) cell lines through chronic Olaparib treatment of LNCaP and C4-2B cell lines. Here, we found that IGFBP3 is highly expressed in acquired (OlapR) and intrinsic (Rv1) models of Olaparib resistance. We show that IGFBP3 expression promotes Olaparib resistance by enhancing DNA repair capacity through activation of EGFR and DNA-PKcs. IGFBP3 depletion enhances efficacy of Olaparib by promoting DNA damage accumulation and subsequently, cell death in resistant models. Mechanistically, we show that silencing IGFBP3 or EGFR expression reduces cell viability and resensitizes OlapR cells to Olaparib treatment. Inhibition of EGFR by Gefitinib suppressed growth of OlapR cells and improved Olaparib sensitivity, thereby phenocopying IGFBP3 inhibition. Collectively, our results highlight IGFBP3 and EGFR as critical mediators of Olaparib resistance.
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Affiliation(s)
- Amy R. Leslie
- Department of Urologic Surgery, University of California Davis, Davis, CA, USA
| | - Shu Ning
- Department of Urologic Surgery, University of California Davis, Davis, CA, USA
| | | | | | - Masuda Sharifi
- Department of Urologic Surgery, University of California Davis, Davis, CA, USA
| | - Zachary A. Schaaf
- Department of Urologic Surgery, University of California Davis, Davis, CA, USA
| | - Wei Lou
- Department of Urologic Surgery, University of California Davis, Davis, CA, USA
| | - Chengfei Liu
- Department of Urologic Surgery, University of California Davis, Davis, CA, USA
- UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, USA
| | - Christopher P. Evans
- Department of Urologic Surgery, University of California Davis, Davis, CA, USA
- UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, USA
| | - Alan P. Lombard
- Department of Urologic Surgery, University of California Davis, Davis, CA, USA
- Department of Biochemistry and Molecular Medicine, University of California Davis, Davis, CA, USA
| | - Allen C. Gao
- Department of Urologic Surgery, University of California Davis, Davis, CA, USA
- UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, USA
- VA Northern California Health Care System, Sacramento, CA, USA
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Schaaf ZA, Ning S, Leslie AR, Sharifi M, Han X, Armstrong C, Lou W, Lombard AP, Liu C, Gao AC. Therapeutic Resistance Models and Treatment Sequencing in Advanced Prostate Cancer. Cancers (Basel) 2023; 15:5273. [PMID: 37958444 PMCID: PMC10650051 DOI: 10.3390/cancers15215273] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 10/31/2023] [Accepted: 11/01/2023] [Indexed: 11/15/2023] Open
Abstract
Current common treatments for castration-resistant prostate cancer (CRPC) typically belong to one of three major categories: next-generation anti-androgen therapies (NGAT) including enzalutamide, abiraterone acetate, apalutamide, and darolutamide; taxane therapy represented by docetaxel; and PARP inhibitors (PARPi) like olaparib. Although these treatments have shown efficacy and have improved outcomes for many patients, some do not survive due to the emergence of therapeutic resistance. The clinical landscape is further complicated by limited knowledge about how the sequence of treatments impacts the development of therapeutic cross-resistance in CRPC. We have developed multiple CRPC models of acquired therapeutic resistance cell sublines from C4-2B cells. These include C4-2B MDVR, C4-2B AbiR, C4-2B ApaR, C4-2B DaroR, TaxR, and 2B-olapR, which are resistant to enzalutamide, abiraterone, apalutamide, darolutamide, docetaxel, and olaparib, respectively. These models are instrumental for analyzing gene expression and assessing responses to various treatments. Our findings reveal distinct cross-resistance characteristics among NGAT-resistant cell sublines. Specifically, resistance to enzalutamide induces resistance to abiraterone and vice versa, while maintaining sensitivity to taxanes and olaparib. Conversely, cells with acquired resistance to docetaxel exhibit cross-resistance to both cabazitaxel and olaparib but retain sensitivity to NGATs like enzalutamide and abiraterone. OlapR cells, significantly resistant to olaparib compared to parental cells, are still responsive to NGATs and docetaxel. Moreover, OlapR models display cross-resistance to other clinically relevant PARP inhibitors, including rucaparib, niraparib, and talazoparib. RNA-sequencing analyses have revealed a complex network of altered gene expressions that influence signaling pathways, energy metabolism, and apoptotic signaling, pivotal to cancer's evolution and progression. The data indicate that resistance mechanisms are distinct among different drug classes. Notably, NGAT-resistant sublines exhibited a significant downregulation of androgen-regulated genes, contrasting to the stable expression noted in olaparib and docetaxel-resistant sublines. These results may have clinical implications by showing that treatments of one class can be sequenced with those from another class, but caution should be taken when sequencing drugs of the same class.
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Affiliation(s)
- Zachary A. Schaaf
- Department of Urologic Surgery, University of California Davis, Sacramento, CA 95817, USA; (Z.A.S.); (S.N.); (A.R.L.); (M.S.); (X.H.); (C.A.); (W.L.); (A.P.L.); (C.L.)
| | - Shu Ning
- Department of Urologic Surgery, University of California Davis, Sacramento, CA 95817, USA; (Z.A.S.); (S.N.); (A.R.L.); (M.S.); (X.H.); (C.A.); (W.L.); (A.P.L.); (C.L.)
| | - Amy R. Leslie
- Department of Urologic Surgery, University of California Davis, Sacramento, CA 95817, USA; (Z.A.S.); (S.N.); (A.R.L.); (M.S.); (X.H.); (C.A.); (W.L.); (A.P.L.); (C.L.)
| | - Masuda Sharifi
- Department of Urologic Surgery, University of California Davis, Sacramento, CA 95817, USA; (Z.A.S.); (S.N.); (A.R.L.); (M.S.); (X.H.); (C.A.); (W.L.); (A.P.L.); (C.L.)
| | - Xianrui Han
- Department of Urologic Surgery, University of California Davis, Sacramento, CA 95817, USA; (Z.A.S.); (S.N.); (A.R.L.); (M.S.); (X.H.); (C.A.); (W.L.); (A.P.L.); (C.L.)
| | - Cameron Armstrong
- Department of Urologic Surgery, University of California Davis, Sacramento, CA 95817, USA; (Z.A.S.); (S.N.); (A.R.L.); (M.S.); (X.H.); (C.A.); (W.L.); (A.P.L.); (C.L.)
| | - Wei Lou
- Department of Urologic Surgery, University of California Davis, Sacramento, CA 95817, USA; (Z.A.S.); (S.N.); (A.R.L.); (M.S.); (X.H.); (C.A.); (W.L.); (A.P.L.); (C.L.)
| | - Alan P. Lombard
- Department of Urologic Surgery, University of California Davis, Sacramento, CA 95817, USA; (Z.A.S.); (S.N.); (A.R.L.); (M.S.); (X.H.); (C.A.); (W.L.); (A.P.L.); (C.L.)
- UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA 95817, USA
- Department of Biochemistry and Molecular Medicine, University of California Davis, Sacramento, CA 95616, USA
| | - Chengfei Liu
- Department of Urologic Surgery, University of California Davis, Sacramento, CA 95817, USA; (Z.A.S.); (S.N.); (A.R.L.); (M.S.); (X.H.); (C.A.); (W.L.); (A.P.L.); (C.L.)
- UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA 95817, USA
| | - Allen C. Gao
- Department of Urologic Surgery, University of California Davis, Sacramento, CA 95817, USA; (Z.A.S.); (S.N.); (A.R.L.); (M.S.); (X.H.); (C.A.); (W.L.); (A.P.L.); (C.L.)
- UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA 95817, USA
- VA Northern California Health Care System, Sacramento, CA 95655, USA
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Campbell G, Sharifi M, Aria K, Jarrard D, Cho S, Emamekhoo H, Floberg J. Prognostic Utility of (18)F-Fluciclovine Positron Emission Tomography (FACBC) in Biochemically Recurrent (BCR) Prostate Cancer (PCa) Treated with Salvage Radiotherapy. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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D’Abronzo LS, Lombard AP, Ning S, Armstong CM, Leslie AR, Sharifi M, Schaaf ZA, Lou W, Gao AC. Wntless expression promotes lineage plasticity and is associated with neuroendocrine prostate cancer. Am J Clin Exp Urol 2022; 10:299-310. [PMID: 36313205 PMCID: PMC9605943] [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] [Grants] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 09/01/2022] [Indexed: 06/16/2023]
Abstract
Resistance to androgen receptor (AR) targeted therapies remains as the main reason for most prostate cancer related deaths. Lineage plasticity resulting in altered, treatment insensitive prostate tumor cell phenotypes such neuroendocrine differentiated prostate cancer is a common manifestation within resistant tumors upon AR-targeted therapies. The mechanisms responsible for lineage plasticity in prostate cancer remain incompletely understood. Here we demonstrate that the enzalutamide resistant MDVR cell line possesses lineage plastic characteristics associated with overexpression of the Wnt transporter Wntless (WLS). Furthermore, we present evidence that overexpression of WLS is common in varying cell line models of lineage plastic prostate cancer, is higher in neuroendocrine patient samples, and positively correlates with the neuroendocrine marker SYP in clinical data. Targeting WLS in lineage plastic cellular models reduces viability and represses lineage plasticity associated gene expression. Our study provides insight into the importance of WLS to the development of lethal resistant prostate cancer and provides a potential target for the treatment of advanced disease.
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Affiliation(s)
- Leandro S D’Abronzo
- Department of Urologic Surgery, University of California DavisSacramento, California, USA
| | - Alan P Lombard
- Department of Urologic Surgery, University of California DavisSacramento, California, USA
- UC Davis Comprehensive Cancer Center, University of California DavisSacramento, California, USA
- Department of Biochemistry and Molecular Medicine, University of California DavisSacramento, California, USA
| | - Shu Ning
- Department of Urologic Surgery, University of California DavisSacramento, California, USA
| | - Cameron M Armstong
- Department of Urologic Surgery, University of California DavisSacramento, California, USA
| | - Amy R Leslie
- Department of Urologic Surgery, University of California DavisSacramento, California, USA
| | - Masuda Sharifi
- Department of Urologic Surgery, University of California DavisSacramento, California, USA
| | - Zachary A Schaaf
- Department of Urologic Surgery, University of California DavisSacramento, California, USA
| | - Wei Lou
- Department of Urologic Surgery, University of California DavisSacramento, California, USA
| | - Allen C Gao
- Department of Urologic Surgery, University of California DavisSacramento, California, USA
- UC Davis Comprehensive Cancer Center, University of California DavisSacramento, California, USA
- VA Northern California Health Care SystemSacramento, California, USA
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5
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Ning S, Liu C, Lou W, Yang JC, Lombard AP, D'Abronzo LS, Batra N, Yu AM, Leslie AR, Sharifi M, Evans CP, Gao AC. Bioengineered BERA-Wnt5a siRNA Targeting Wnt5a/FZD2 Signaling Suppresses Advanced Prostate Cancer Tumor Growth and Enhances Enzalutamide Treatment. Mol Cancer Ther 2022; 21:1594-1607. [PMID: 35930737 PMCID: PMC9547958 DOI: 10.1158/1535-7163.mct-22-0216] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 03/28/2022] [Revised: 05/23/2022] [Accepted: 07/28/2022] [Indexed: 01/21/2023]
Abstract
The next-generation antiandrogen drugs such as enzalutamide and abiraterone extend survival times and improve quality of life in patients with advanced prostate cancer. However, resistance to both drugs occurs frequently through mechanisms that are incompletely understood. Wnt signaling, particularly through Wnt5a, plays vital roles in promoting prostate cancer progression and induction of resistance to enzalutamide and abiraterone. Development of novel strategies targeting Wnt5a to overcome resistance is an urgent need. In this study, we demonstrated that Wnt5a/FZD2-mediated noncanonical Wnt pathway is overexpressed in enzalutamide-resistant prostate cancer. In patient databases, both the levels of Wnt5a and FZD2 expression are upregulated upon the development of enzalutamide resistance and correlate with higher Gleason score, biochemical recurrence, and metastatic status, and with shortened disease-free survival duration. Blocking Wnt5a/FZD2 signal transduction not only diminished the activation of noncanonical Wnt signaling pathway, but also suppressed the constitutively activated androgen receptor (AR) and AR variants. Furthermore, we developed a novel bioengineered BERA-Wnt5a siRNA construct and demonstrated that inhibition of Wnt5a expression by the BERA-Wnt5a siRNA significantly suppressed tumor growth and enhanced enzalutamide treatment in vivo. These results indicate that Wnt5a/FZD2 signal pathway plays a critical role in promoting enzalutamide resistance, and targeting this pathway by BERA-Wnt5a siRNA can be developed as a potential therapy to treat advanced prostate cancer.
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Affiliation(s)
- Shu Ning
- Department of Urologic Surgery, University of California Davis, Davis, California
| | - Chengfei Liu
- Department of Urologic Surgery, University of California Davis, Davis, California
- UC Davis Comprehensive Cancer Center, University of California Davis, Davis, California
| | - Wei Lou
- Department of Urologic Surgery, University of California Davis, Davis, California
| | - Joy C Yang
- Department of Urologic Surgery, University of California Davis, Davis, California
| | - Alan P Lombard
- Department of Urologic Surgery, University of California Davis, Davis, California
| | - Leandro S D'Abronzo
- Department of Urologic Surgery, University of California Davis, Davis, California
| | - Neelu Batra
- UC Davis Comprehensive Cancer Center, University of California Davis, Davis, California
- Department of Biochemistry and Molecular Medicine, University of California Davis, Davis, California
| | - Ai-Ming Yu
- UC Davis Comprehensive Cancer Center, University of California Davis, Davis, California
- Department of Biochemistry and Molecular Medicine, University of California Davis, Davis, California
| | - Amy R Leslie
- Department of Urologic Surgery, University of California Davis, Davis, California
| | - Masuda Sharifi
- Department of Urologic Surgery, University of California Davis, Davis, California
| | - Christopher P Evans
- Department of Urologic Surgery, University of California Davis, Davis, California
- UC Davis Comprehensive Cancer Center, University of California Davis, Davis, California
| | - Allen C Gao
- Department of Urologic Surgery, University of California Davis, Davis, California
- UC Davis Comprehensive Cancer Center, University of California Davis, Davis, California
- VA Northern California Health Care System, Sacramento, California
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Ning S, Zhao J, Lombard AP, D’Abronzo LS, Leslie AR, Sharifi M, Lou W, Liu C, Yang JC, Evans CP, Corey E, Chen HW, Yu A, Ghosh PM, Gao AC. Activation of neural lineage networks and ARHGEF2 in enzalutamide-resistant and neuroendocrine prostate cancer and association with patient outcomes. Commun Med (Lond) 2022; 2:118. [PMID: 36159187 PMCID: PMC9492734 DOI: 10.1038/s43856-022-00182-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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] [Received: 02/03/2022] [Accepted: 09/05/2022] [Indexed: 01/26/2023] Open
Abstract
Background Treatment-emergent neuroendocrine prostate cancer (NEPC) after androgen receptor (AR) targeted therapies is an aggressive variant of prostate cancer with an unfavorable prognosis. The underlying mechanisms for early neuroendocrine differentiation are poorly defined and diagnostic and prognostic biomarkers are needed. Methods We performed transcriptomic analysis on the enzalutamide-resistant prostate cancer cell line C4-2B MDVR and NEPC patient databases to identify neural lineage signature (NLS) genes. Correlation of NLS genes with clinicopathologic features was determined. Cell viability was determined in C4-2B MDVR and H660 cells after knocking down ARHGEF2 using siRNA. Organoid viability of patient-derived xenografts was measured after knocking down ARHGEF2. Results We identify a 95-gene NLS representing the molecular landscape of neural precursor cell proliferation, embryonic stem cell pluripotency, and neural stem cell differentiation, which may indicate an early or intermediate stage of neuroendocrine differentiation. These NLS genes positively correlate with conventional neuroendocrine markers such as chromogranin and synaptophysin, and negatively correlate with AR and AR target genes in advanced prostate cancer. Differentially expressed NLS genes stratify small-cell NEPC from prostate adenocarcinoma, which are closely associated with clinicopathologic features such as Gleason Score and metastasis status. Higher ARGHEF2, LHX2, and EPHB2 levels among the 95 NLS genes correlate with a shortened survival time in NEPC patients. Furthermore, downregulation of ARHGEF2 gene expression suppresses cell viability and markers of neuroendocrine differentiation in enzalutamide-resistant and neuroendocrine cells. Conclusions The 95 neural lineage gene signatures capture an early molecular shift toward neuroendocrine differentiation, which could stratify advanced prostate cancer patients to optimize clinical treatment and serve as a source of potential therapeutic targets in advanced prostate cancer.
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Affiliation(s)
- Shu Ning
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA
| | - Jinge Zhao
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA ,grid.13291.380000 0001 0807 1581Present Address: Department of Urology, West China Hospital, Sichuan University, Sichuan, China
| | - Alan P. Lombard
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA
| | - Leandro S. D’Abronzo
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA
| | - Amy R. Leslie
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA
| | - Masuda Sharifi
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA
| | - Wei Lou
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA
| | - Chengfei Liu
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA ,grid.27860.3b0000 0004 1936 9684UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA USA
| | - Joy C. Yang
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA
| | - Christopher P. Evans
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA ,grid.27860.3b0000 0004 1936 9684UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA USA
| | - Eva Corey
- grid.34477.330000000122986657Department of Urology, University of Washington, Seattle, WA USA
| | - Hong-Wu Chen
- grid.27860.3b0000 0004 1936 9684UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA USA ,grid.27860.3b0000 0004 1936 9684Department of Biochemistry and Molecular Medicine, University of California Davis, Sacramento, CA USA
| | - Aiming Yu
- grid.27860.3b0000 0004 1936 9684UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA USA ,grid.27860.3b0000 0004 1936 9684Department of Biochemistry and Molecular Medicine, University of California Davis, Sacramento, CA USA
| | - Paramita M. Ghosh
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA ,grid.27860.3b0000 0004 1936 9684UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA USA ,grid.27860.3b0000 0004 1936 9684Department of Biochemistry and Molecular Medicine, University of California Davis, Sacramento, CA USA ,grid.413933.f0000 0004 0419 2847VA Northern California Health Care System, Sacramento, CA USA
| | - Allen C. Gao
- grid.27860.3b0000 0004 1936 9684Department of Urologic Surgery, University of California Davis, Sacramento, CA USA ,grid.27860.3b0000 0004 1936 9684UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, CA USA ,grid.413933.f0000 0004 0419 2847VA Northern California Health Care System, Sacramento, CA USA
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Lombard AP, Armstrong CM, D'Abronzo LS, Ning S, Leslie AR, Sharifi M, Lou W, Evans CP, Dall'Era M, Chen HW, Chen X, Gao AC. Olaparib-Induced Senescence Is Bypassed through G2-M Checkpoint Override in Olaparib-Resistant Prostate Cancer. Mol Cancer Ther 2022; 21:677-685. [PMID: 35086956 PMCID: PMC8983570 DOI: 10.1158/1535-7163.mct-21-0604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 07/09/2021] [Revised: 10/08/2021] [Accepted: 01/12/2022] [Indexed: 11/16/2022]
Abstract
PARP inhibition represents the dawn of precision medicine for treating prostate cancer. Despite this advance, questions remain regarding the use of PARP inhibitors (PARPi) for the treatment of this disease, including (i) how specifically do PARPi-sensitive tumor cells respond to treatment, and (ii) how does PARPi resistance develop? To address these questions, we characterized response to olaparib in sensitive LNCaP and C4-2B cells and developed two olaparib-resistant derivative cell line models from each, termed LN-OlapR and 2B-OlapR, respectively. OlapR cells possess distinct morphology from parental cells and display robust resistance to olaparib and other clinically relevant PARPis, including rucaparib, niraparib, and talazoparib. In LNCaP and C4-2B cells, we found that olaparib induces massive DNA damage, leading to activation of the G2-M checkpoint, activation of p53, and cell-cycle arrest. Furthermore, our data suggest that G2-M checkpoint activation leads to both cell death and senescence associated with p21 activity. In contrast, both LN-OlapR and 2B-OlapR cells do not arrest at G2-M and display a markedly blunted response to olaparib treatment. Interestingly, both OlapR cell lines harbor increased DNA damage relative to parental cells, suggesting that OlapR cells accumulate and manage persistent DNA damage during acquisition of resistance, likely through augmenting DNA repair capacity. Further impairing DNA repair through CDK1 inhibition enhances DNA damage, induces cell death, and sensitizes OlapR cells to olaparib treatment. Our data together further our understanding of PARPi treatment and provide a cellular platform system for the study of response and resistance to PARP inhibition.
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Affiliation(s)
- Alan P Lombard
- Department of Urologic Surgery, University of California, Davis, Davis, California
- UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, California
| | - Cameron M Armstrong
- Department of Urologic Surgery, University of California, Davis, Davis, California
| | - Leandro S D'Abronzo
- Department of Urologic Surgery, University of California, Davis, Davis, California
| | - Shu Ning
- Department of Urologic Surgery, University of California, Davis, Davis, California
| | - Amy R Leslie
- Department of Urologic Surgery, University of California, Davis, Davis, California
| | - Masuda Sharifi
- Department of Urologic Surgery, University of California, Davis, Davis, California
| | - Wei Lou
- Department of Urologic Surgery, University of California, Davis, Davis, California
| | - Christopher P Evans
- Department of Urologic Surgery, University of California, Davis, Davis, California
- UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, California
| | - Marc Dall'Era
- Department of Urologic Surgery, University of California, Davis, Davis, California
- UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, California
| | - Hong-Wu Chen
- UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, California
- Department of Biochemistry and Molecular Medicine, University of California, Davis, Davis, California
- VA Northern California Health Care System, Sacramento, California
| | - Xinbin Chen
- UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, California
- School of Veterinary Medicine, University of California, Davis, Davis, California
| | - Allen C Gao
- Department of Urologic Surgery, University of California, Davis, Davis, California
- UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, California
- VA Northern California Health Care System, Sacramento, California
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Ezatkhah F, Sharifi I, Babaei Z, Baneshi MR, Zolala F, Kermanizadeh A, Keyhani A, Sharifi M, Dezaki ES, Aflatoonian MR, Aflatoonian B, Khatami M, Bamorovat M. Clinical and laboratory evaluation of cured and non-cured patients with cutaneous leishmaniasis treated by Glucantime. J Vector Borne Dis 2021; 56:351-359. [PMID: 33269736 DOI: 10.4103/0972-9062.302039] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND & OBJECTIVES Insufficient treatment of cutaneous leishmaniasis (CL) by conventional drugs is a major barrier in control strategies. This study was aimed to evaluate Glucantime efficacy and the susceptibility of Glucantime unresponsive and responsive CL isolates in the field and laboratory. METHODS Chi-square test (x[2]) was used to determine the significance of difference between proportions in Glucantime-treated patients. The inhibitory activity of various concentrations of Glucantime against Leishmenia tropica stages was evaluated by a colorimetric cell viability MTT and macrophage assays. Mixed model, t-test and ANOVA were performed to determine the significance of difference between various concentrations of Glucantime unresponsive or responsive isolates and untreated control group and p <0.05 was defined as significant level. Altogether, 89.8% of the patients were cured by Glucantime, whilst 10.2% remained non-cured. RESULTS The overall Glucantime efficacy in different age groups and genders was similar. The IC50 values of promastigotes and amastigotes for Glucanime unresponsive isolates were 2.1 and 2.6 times higher than the equivalent rates obtained for responsive cases, respectively. The overall mean number of amastigotes within macrophages in unresponsive isolates was significantly higher (32.68 ± 1.24) than that in responsive ones (18.68 ± 1.52, p <0.001). Glucantime unresponsive and responsive field isolates of anthroponotic CL (ACL) caused by L. tropica strongly correlated to in vitro assays. INTERPRETATION & CONCLUSION Monitoring of Glucantime unresponsiveness by the health surveillance system is extremely important, where anthroponotic transmission occurs in humans. Hence, physicians should be aware of such clinical unresponsive presentations with ACL for antimonial therapeutic failure to improve management of disease in endemic regions.
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Affiliation(s)
- F Ezatkhah
- Leishmaniasis Research Center; Department of Parasitology and Mycology, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - I Sharifi
- Leishmaniasis Research Center; Department of Parasitology and Mycology, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Z Babaei
- Research Center for Modeling in Health, Kerman University of Medical Sciences, Kerman, Iran
| | - M R Baneshi
- Research Center for Modeling in Health, Kerman University of Medical Sciences, Kerman, Iran
| | - F Zolala
- Research Center for Modeling in Health, Kerman University of Medical Sciences, Kerman, Iran
| | | | - A Keyhani
- Leishmaniasis Research Center, Kerman, Iran
| | - M Sharifi
- Kerman Oral and Dental Diseases Research Center, Kerman, Iran
| | - E S Dezaki
- Department of Parasitology and Mycology, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - M R Aflatoonian
- Research Center of Tropical and Infectious Diseases, Kerman University of Medical Sciences, Kerman, Iran
| | - B Aflatoonian
- Research Center of Tropical and Infectious Diseases, Kerman University of Medical Sciences, Kerman, Iran
| | - M Khatami
- School of Medicine, Bam University of Medical Sciences, Bam; Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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Blokhina YP, Frees MA, Nguyen A, Sharifi M, Chu DB, Bispo K, Olaya I, Draper BW, Burgess SM. Rad21l1 cohesin subunit is dispensable for spermatogenesis but not oogenesis in zebrafish. PLoS Genet 2021; 17:e1009127. [PMID: 34138874 PMCID: PMC8291703 DOI: 10.1371/journal.pgen.1009127] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 07/20/2021] [Accepted: 05/04/2021] [Indexed: 01/12/2023] Open
Abstract
During meiosis I, ring-shaped cohesin complexes play important roles in aiding the proper segregation of homologous chromosomes. RAD21L is a meiosis-specific vertebrate cohesin that is required for spermatogenesis in mice but is dispensable for oogenesis in young animals. The role of this cohesin in other vertebrate models has not been explored. Here, we tested if the zebrafish homolog Rad21l1 is required for meiotic chromosome dynamics during spermatogenesis and oogenesis. We found that Rad21l1 localizes to unsynapsed chromosome axes. It is also found between the axes of the mature tripartite synaptonemal complex (SC) in both sexes. We knocked out rad21l1 and found that nearly all rad21l1-/- mutants develop as fertile males, suggesting that the mutation causes a defect in juvenile oogenesis, since insufficient oocyte production triggers female to male sex reversal in zebrafish. Sex reversal was partially suppressed by mutation of the checkpoint gene tp53, suggesting that the rad21l1 mutation activates Tp53-mediated apoptosis or arrest in females. This response, however, is not linked to a defect in repairing Spo11-induced double-strand breaks since deletion of spo11 does not suppress the sex reversal phenotype. Compared to tp53 single mutant controls, rad21l1-/- tp53-/- double mutant females produce poor quality eggs that often die or develop into malformed embryos. Overall, these results indicate that the absence of rad21l1-/- females is due to a checkpoint-mediated response and highlight a role for a meiotic-specific cohesin subunit in oogenesis but not spermatogenesis.
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Affiliation(s)
- Yana P. Blokhina
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
- Integrative Genetics and Genomics Graduate Group, University of California, Davis, California, United States of America
| | - Michelle A. Frees
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
| | - An Nguyen
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
| | - Masuda Sharifi
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
- Biochemistry, Molecular, Cellular, and Developmental Biology Graduate Group, University of California, Davis, California, United States of America
| | - Daniel B. Chu
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
- Integrative Genetics and Genomics Graduate Group, University of California, Davis, California, United States of America
| | - Kristi Bispo
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
| | - Ivan Olaya
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
- Integrative Genetics and Genomics Graduate Group, University of California, Davis, California, United States of America
| | - Bruce W. Draper
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
| | - Sean M. Burgess
- Department of Molecular and Cellular Biology, University of California, Davis, California, United States of America
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Sharifi M, Shirazi-Adl A. Changes in gastrocnemii activation at mid-to-late stance markedly affects the intact and anterior cruciate ligament deficient knee biomechanics and stability in gait. Knee 2021; 29:530-540. [PMID: 33756263 DOI: 10.1016/j.knee.2021.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 01/26/2021] [Accepted: 03/03/2021] [Indexed: 02/02/2023]
Abstract
INTRODUCTION We aimed to quantify the sensitivity in biomechanical response and stability of the intact and anterior cruciate ligament deficient (ACL-D) joints at mid-to-late stance periods of gait to the alterations in activation of gastrocnemii (Gas) muscles. METHODS A validated kinematics-driven musculoskeletal finite-element model of the lower extremity is used to compute knee joint response and stability under reported kinetics-kinematics of healthy subjects. Activation in Gas is altered under prescribed gait data at the mid-to-late stance of gait and associated changes in remaining muscle forces/contact forces/areas/ACL force and joint stability are computed in both intact and ACL-D joints. RESULTS In the intact joint, the anterior-tibial-translation (ATT) as well as ACL and joint contact forces follow variations in Gas forces. Both the stability and ATT of an ACL-D joint are restored to the near-intact levels when the activity in Gas is reduced. Knee joint instability, excessive ATT as well as larger peak articular contact stresses with a posterior shift in contact areas are estimated under greater Gas forces. CONCLUSIONS ACL-D joint is unstable with ATT > 10 mm under larger activities in Gas. Gas is an ACL-antagonist while hamstrings and soleus are ACL-agonists. The near-intact joint stability and ATT of an ACL-D joint can be restored at a lower activation in Gas; or in other words, when activation in ACL-antagonist muscles drops compared with that in ACL-agonist muscles. Results could help analyze the gait of ACL-D copers and non-copers and provide better understanding towards improved preventive, diagnostic, and treatment approaches.
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Affiliation(s)
- M Sharifi
- Division of Applied Mechanics, Department of Mechanical Engineering, Polytechnique, Montréal, Québec, Canada.
| | - A Shirazi-Adl
- Division of Applied Mechanics, Department of Mechanical Engineering, Polytechnique, Montréal, Québec, Canada
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Sharifi M, Shirazi-Adl A. Knee flexion angle and muscle activations control the stability of an anterior cruciate ligament deficient joint in gait. J Biomech 2021; 117:110258. [PMID: 33493713 DOI: 10.1016/j.jbiomech.2021.110258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 01/03/2021] [Accepted: 01/10/2021] [Indexed: 01/14/2023]
Abstract
Anterior cruciate ligament (ACL) is a primary structure and a commonly injured ligament of the knee joint. Some patients with ACL deficiency (ACLD) experience joint instability and require a reconstructive surgery to return to daily routines, some can adapt by limiting their activities while others, called copers, can return to high-level activities with no instability. We investigated the effects of alterations in the knee flexion angle (KFA) and muscle force activations on the stability and biomechanics of ACLD joints at 25, 50, and 75% periods of gait stance. ACLD joint stability is controlled by variations in both KFA and knee muscle forces. For the latter, a parameter called activity index is defined as the ratio of forces in ACL antagonists (quadriceps and gastrocnemii) to those in ACL agonists (hamstrings). Under a greater KFA (2-6° beyond the mean of reported values in healthy subjects), an ACLD joint regains its pre-injury stability levels. The ACLD joint stability also markedly improves at smaller quadriceps and larger hamstrings forces (activity indices of 2.0-3.6 at 25%) at the first half of stance and smaller gastrocnemii and larger hamstrings forces (activity indices of 0.1-1.1 at 50% and 0.1-1.2 at 75%) at the second half of stance. Activity index and KFA are both crucial when assessing the dynamic stability of an ACLD joint. These results are helpful in our understanding of the biomechanics and stability of ACLD joints towards improved prevention and treatment strategies.
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Affiliation(s)
- M Sharifi
- Division of Applied Mechanics, Department of Mechanical Engineering, Polytechnique Montréal, Québec, Canada
| | - A Shirazi-Adl
- Division of Applied Mechanics, Department of Mechanical Engineering, Polytechnique Montréal, Québec, Canada.
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Espig M, Finlay-Smits SC, Meenken ED, Wheeler DM, Sharifi M. Uncertainty in and around biophysical modelling: insights from interdisciplinary research on agricultural digitalization. R Soc Open Sci 2020; 7:201511. [PMID: 33489287 PMCID: PMC7813261 DOI: 10.1098/rsos.201511] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 11/30/2020] [Indexed: 05/26/2023]
Abstract
Agricultural digitalization is providing growing amounts of real-time digital data. Biophysical simulation models can help interpret these data. However, these models are subject to complex uncertainties, which has prompted calls for interdisciplinary research to better understand and communicate modelling uncertainties and their impact on decision-making. This article develops two corresponding insights from an interdisciplinary project in a New Zealand agricultural research organization. First, we expand on a recent Royal Society Open Science journal article (van der Bles et al. 2019 Royal Society Open Science 6, 181870 (doi:10.1098/rsos.181870)) and suggest a threefold conceptual framework to describe direct, indirect and contextual uncertainties associated with biophysical models. Second, we reflect on the process of developing this framework to highlight challenges to successful collaboration and the importance of a deeper engagement with interdisciplinarity. This includes resolving often unequal disciplinary standings and the need for early collaborative problem framing. We propose that both insights are complementary and informative to researchers and practitioners in the field of modelling uncertainty as well as to those interested in interdisciplinary environmental research generally. The article concludes by outlining limitations of interdisciplinary research and a shift towards transdisciplinarity that also includes non-scientists. Such a shift is crucial to holistically address uncertainties associated with biophysical modelling and to realize the full potential of agricultural digitalization.
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Affiliation(s)
- M. Espig
- AgResearch, Lincoln Research Centre, 1365 Springs Road, Lincoln 7674, New Zealand
| | - S. C. Finlay-Smits
- AgResearch, Lincoln Research Centre, 1365 Springs Road, Lincoln 7674, New Zealand
| | - E. D. Meenken
- AgResearch, Lincoln Research Centre, 1365 Springs Road, Lincoln 7674, New Zealand
| | - D. M. Wheeler
- AgResearch, Ruakura Agricultural Centre, 10 Bisley Road, Enderley, Hamilton 3214, New Zealand
| | - M. Sharifi
- AgResearch, Lincoln Research Centre, 1365 Springs Road, Lincoln 7674, New Zealand
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Yaghobi S, Vaissi S, Khas ZT, Sharifi M. Influence of Salinity on Predator–Prey Interactions between the Mosquitofish (Gambusia affinis) and Larvae of the Green Toad (Bufotes variabilis). RUSS J ECOL+ 2020. [DOI: 10.1134/s1067413620030157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Sharifi M, Shirazi-Adl A, Marouane H. Sensitivity of the knee joint response, muscle forces and stability to variations in gait kinematics-kinetics. J Biomech 2020; 99:109472. [DOI: 10.1016/j.jbiomech.2019.109472] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 10/24/2019] [Accepted: 10/26/2019] [Indexed: 10/25/2022]
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Meidani Z, Mousavi GA, Kheirkhah D, Benar N, Maleki MR, Sharifi M, Farrokhian A. Going beyond audit and feedback: towards behaviour-based interventions to change physician laboratory test ordering behaviour. J R Coll Physicians Edinb 2019. [PMID: 29537404 DOI: 10.4997/jrcpe.2017.407] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Studies indicate there are a variety of contributing factors affecting physician test ordering behaviour. Identifying these behaviours allows development of behaviour-based interventions. Methods Through a pilot study, the list of contributing factors in laboratory tests ordering, and the most ordered tests, were identified, and given to 50 medical students, interns, residents and paediatricians in questionnaire form. The results showed routine tests and peer or supervisor pressure as the most influential factors affecting physician ordering behaviour. An audit and feedback mechanism was selected as an appropriate intervention to improve physician ordering behaviour. The intervention was carried out at two intervals over a three-month period. Findings There was a large reduction in the number of laboratory tests ordered; from 908 before intervention to 389 and 361 after first and second intervention, respectively. There was a significant relationship between audit and feedback and the meaningful reduction of 7 out of 15 laboratory tests including complete blood count (p = 0.002), erythrocyte sedimentation rate (p = 0.01), C-reactive protein (p = 0.01), venous blood gas (p = 0.016), urine analysis (p = 0.005), blood culture (p = 0.045) and stool examination (p = 0.001). Conclusion The audit and feedback intervention, even in short duration, affects physician ordering behaviour. It should be designed in terms of behaviour-based intervention and diagnosis of the contributing factors in physicians' behaviour. Further studies are required to substantiate the effectiveness of such behaviour-based intervention strategies in changing physician behaviour.
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Affiliation(s)
- Z Meidani
- D Kheirkhah, Infectious Diseases Research Centre, Kashan University of Medical Sciences, Kashan, Iran.
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17
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Salehi T, Sharifi M. Comparing the predatory impact of captive–bred and free–living yellow spotted mountain newt (Neurergus microspilotus) on the larval green toad (Bufotes variabilis). Anim Biodiv Conserv 2019. [DOI: 10.32800/abc.2018.42.0031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ghanbari A, Sharifi M, Adib M. Effects of acupressure on fatigue in patients with cancer underwent chemotherapy. Eur J Surg Oncol 2019. [DOI: 10.1016/j.ejso.2018.10.312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Taheri Khas Z, Vaissi S, Yaghobi S, Sharifi M. Temperature Induced Predation Impact of Mosquitofish (Gambusia affinis) on Growth, Development, and Survival of Larvae and Tadpole of Bufotes variabilis (Amphibia: Anura). RUSS J ECOL+ 2019. [DOI: 10.1134/s1067413619010119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sharifi M, Taghizadeh A, Khadem AA, Hosseinkhani A, Mohammadzadeh H. Effects of nitrate supplementation and forage level on gas production, nitrogen balance and dry-matter degradation in sheep. Anim Prod Sci 2019. [DOI: 10.1071/an17759] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The present study was conducted to evaluate the effect of nitrate supplementation on dry-matter (DM) degradation and ruminal fermentation parameters by using in vitro gas production and in situ technique. In vitro gas production and in situ DM degradation in the presence or absence of nitrate were recorded at all incubation times. At all incubation times, diets incubated with nitrate gave a significantly lower gas production than did the other diets, except at 2-h incubation. Ruminal DM degradation did not differ among the experimental treatments. Furthermore, at most incubation times, total volatile fatty acids in diets containing nitrate were lower than those in the other treatments. Nitrate supplementation considerably increased gas production from the insoluble fraction, whereas it decreased gas production from the quickly soluble fraction, and potential gas production. Moreover, in all incubations, there were significant correlations between gas production and in situ DM-degradation parameters. The control diet had the greatest retained nitrogen content, but the diets containing nitrate had the greatest faecal nitrogen. The results showed that nitrate addition resulted in a lower gas production and volatile fatty acid production in in vitro assay. It was concluded that considering the strong posetive relationship between the two methodologies, the degradability parameters can be predicted from obtained gas production.
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Salehi T, Sharifi M. Comparing the predatory impact of captive–bred and free–living yellow spotted mountain newt (Neurergus microspilotus) on the larval green toad (Bufotes variabilis). Anim Biodiv Conserv 2019. [DOI: 10.32800/abc.2019.42.0031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Meidani Z, Farzandipour M, Davoodabadi A, Farrokhian A, Kheirkhah D, Sharifi M, Khanghahi ME. Effect of reinforced audit and feedback intervention on physician behaviour: a multifaceted strategy for targeting medical record documentation. J R Coll Physicians Edinb 2018; 47:237-242. [DOI: 10.4997/jrcpe.2017.305] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Sharifi M, Shirazi-Adl A, Marouane H. Computational stability of human knee joint at early stance in Gait: Effects of muscle coactivity and anterior cruciate ligament deficiency. J Biomech 2017; 63:110-116. [DOI: 10.1016/j.jbiomech.2017.08.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 06/21/2017] [Accepted: 08/07/2017] [Indexed: 10/19/2022]
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Hoshi N, Jain A, Kolvekar T, Sharifi M, Nair D. Genetic and phenotypic spectrum of hypertriglyceridaemia in a lipid clinic in the UK. ATHEROSCLEROSIS SUPP 2017. [DOI: 10.1016/j.atherosclerosissup.2017.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Rayevsky AV, Sharifi M, Tukalo MA. Molecular modeling and molecular dynamics simulation study of archaeal leucyl-tRNA synthetase in complex with different mischarged tRNA in editing conformation. J Mol Graph Model 2017; 76:289-295. [PMID: 28743072 DOI: 10.1016/j.jmgm.2017.06.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 06/07/2017] [Accepted: 06/23/2017] [Indexed: 12/20/2022]
Abstract
Aminoacyl-tRNA synthetases (aaRSs) play important roles in maintaining the accuracy of protein synthesis. Some aaRSs accomplish this via editing mechanisms, among which leucyl-tRNA synthetase (LeuRS) edits non-cognate amino acid norvaline mainly by post-transfer editing. However, the molecular basis for this pathway for eukaryotic and archaeal LeuRS remain unclear. In this study, a complex of archaeal P. horikoshii LeuRS (PhLeuRS) with misacylated tRNALeu was modeled wherever tRNA's acceptor stem was oriented directly into the editing site. To understand the distinctive features of organization we reconstructed a complex of PhLeuRS with tRNA and visualize post-transfer editing interactions mode by performing molecular dynamics (MD) simulation studies. To study molecular basis for substrate selectivity by PhLeuRS's editing site we utilized MD simulation of the entire LeuRS complexes using a diverse charged form of tRNAs, namely norvalyl-tRNALeu and isoleucyl-tRNALeu. In general, the editing site organization of LeuRS from P.horikoshii has much in common with bacterial LeuRS. The MD simulation results revealed that the post-transfer editing substrate norvalyl-A76, binds more strongly than isoleucyl-A76. Moreover, the branched side chain of isoleucine prevents water molecules from being closer and hence the hydrolysis reaction slows significantly. To investigate a possible mechanism of the post-transfer editing reaction, by PhLeuRS we have determined that two water molecules (the attacking and assisting water molecules) are localized near the carbonyl group of the amino acid to be cleaved off. These water molecules approach the substrate from the opposite side to that observed for Thermus thermophilus LeuRS (TtLeuRS). Based on the results obtained, it was suggested that the post-transfer editing mechanism of PhLeuRS differs from that of prokaryotic TtLeuRS.
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Affiliation(s)
- A V Rayevsky
- Institute of Molecular Biology and Genetics, NAS of Ukraine, 150 Academician Zabolotny Str., Kyiv 03680, Ukraine.
| | - M Sharifi
- Medway School of Pharmacy, Universities of Kent and Greenwich, Kent ME4 4TB, UK
| | - M A Tukalo
- Institute of Molecular Biology and Genetics, NAS of Ukraine, 150 Academician Zabolotny Str., Kyiv 03680, Ukraine.
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Sharifi M, Bashtani M, Naserian AA, Farhangfar H, Emami A. The effect of grapeseed oil on performance, rumen fermentation, antioxidant status and subcutaneous adipose fatty acid profile in lambs. J Anim Physiol Anim Nutr (Berl) 2017; 102:157-165. [PMID: 28444841 DOI: 10.1111/jpn.12673] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Accepted: 12/14/2016] [Indexed: 11/28/2022]
Abstract
This experiment was carried out to examine the effect of grapeseed oil (GSO) on performance, rumen fermentation, antioxidant status and subcutaneous adipose fatty acid (FA) profile in lambs. Eighteen Baluchi lambs, 196 ± 14 days of age and 39.8 ± 1.7 kg body weight, were randomly assigned to three experimental diets: (i) diet without GSO (control), (ii) diet containing 2% of GSO (GSO2) and (iii) diet containing 4% of GSO (GSO4) for 42 days. Results showed that the experimental diets had no significant effect on dry matter intake and performance (p > 0.05). The supplemented diets with GSO had no effect on pH and NH3 -N of rumen fluid (p > 0.05), but GSO4 increased (p = 0.003) the concentration of propionic acid and reduced (p = 0.002) the concentration of acetate acid compared to the control. Inclusion 4% of GSO to the diet increased total antioxidant activity and decreased malondialdehyde in serum and muscle (p < 0.001). The level of blood glutathione peroxidase in diets containing GSO was higher than control diet (p = 0.02), but diets had no effect on superoxide dismutase in blood and muscle tissues (p > 0.05). The concentration of vaccenic acid, rumenic acid and linoleic acid and thus polyunsaturated fatty acid in subcutaneous fat was affected by experimental diets (p < 0.001), as control had the lowest amount of these FAs and GSO4 had the highest amount of them. Therefore, it can be concluded that the use of GSO up to 4% improves the antioxidant status and adipose fatty acid profile in lambs without effects on performance.
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Affiliation(s)
- M Sharifi
- Department of Animal Science, Faculty of Agriculture, University of Birjand, Birjand, Iran
| | - M Bashtani
- Department of Animal Science, Faculty of Agriculture, University of Birjand, Birjand, Iran
| | - A A Naserian
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - H Farhangfar
- Department of Animal Science, Faculty of Agriculture, University of Birjand, Birjand, Iran
| | - A Emami
- Department of Animal Science, Faculty of Agriculture, University of Birjand, Birjand, Iran
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Sayyad G, Price GW, Sharifi M, Khosravi K. Fate and transport modeling of phthalate esters from biosolid amended soil under corn cultivation. J Hazard Mater 2017; 323:264-273. [PMID: 27453260 DOI: 10.1016/j.jhazmat.2016.07.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 07/10/2016] [Accepted: 07/11/2016] [Indexed: 06/06/2023]
Abstract
Phthalate esters (PAEs) are prevalent in the environment due to the broad range of industrial, agriculture and domestic applications. The ubiquitous use of PAEs has resulted in their potential to reach groundwater sources through application of agri-chemicals and municipal biosolids. A study was conducted to monitor the fate and transport of seven commonly detected PAEs in the environment including: dimethyl phthalate (DMP), diethyl phthalate (DEP), benzyl butyl phthalate (BBP), bis(di-ethyl hexyl) phthalate (DEHP), di-n-octyl phthalate (DnOP), dipentyl phthalate (DPP), and di-n-butyl phthalate (DnBP). Biosolids sourced from the Halifax Regional Municipality were applied at three rates on field-based lysimeter cells which were cropped to corn (Zea mays) for one growing season. In the present study, breakthrough curves (BTCs) were established for phthalates leaching from a corn-cultivated agricultural soil profile. The HYDRUS-1D model and a two-site sorption model were applied to predict transport parameters of PAEs using an inverse solution approach. Results of our research revealed that higher PAE adsorption was observed based on increasing carbon chain number. In addition, higher values of F (i.e. the fraction of type-1 sorption sites assumed to be in equilibrium with the solution phase) and lower values of D (i.e. dispersion coefficient) were observed for PAEs with large carbon chains which was validated both through the empirical dataset and the model simulations.
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Affiliation(s)
- G Sayyad
- Department of Soil Science, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran; Environmental & Life Sciences, Trent University, 1600 West Bank Drive, Peterborough, Ontario K9J 7B8, Canada
| | - G W Price
- Department of Engineering, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia B2N 5E3, Canada.
| | - M Sharifi
- Canada Research Chair, Trent School of Environment, Peterborough, Ontario K9J 7B8, Canada
| | - K Khosravi
- Department of Engineering, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia B2N 5E3, Canada
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Sharifi M, Bashtani M, Naserian AA, Farhangfar H. The Effect of increasing levels of date palm (Phoenix dactyliferaL.) seed on the performance, ruminal fermentation, antioxidant status and milk fatty acid profile of Saanen dairy goats. J Anim Physiol Anim Nutr (Berl) 2017; 101:e332-e341. [DOI: 10.1111/jpn.12609] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 09/02/2016] [Indexed: 11/27/2022]
Affiliation(s)
- M. Sharifi
- Department of Animal Science; Faculty of Agriculture; University of Birjand; Birjand Iran
| | - M. Bashtani
- Department of Animal Science; Faculty of Agriculture; University of Birjand; Birjand Iran
| | - A. A. Naserian
- Department of Animal Science; Faculty of Agriculture; Ferdowsi University of Mashhad; Mashhad Iran
| | - H. Farhangfar
- Department of Animal Science; Faculty of Agriculture; University of Birjand; Birjand Iran
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Elkum N, Al-Arouj M, Sharifi M, Shaltout A, Bennakhi A. Prevalence of childhood obesity in the state of Kuwait. Pediatr Obes 2016; 11:e30-e34. [PMID: 26663908 DOI: 10.1111/ijpo.12090] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 10/21/2015] [Accepted: 10/24/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Overweight and obesity have reached an epidemic in Kuwait, with the highest rate of adult obesity in the region. National estimates of childhood obesity in Kuwait are scarce. The purpose of this study is to evaluate the prevalence of overweight and obesity among school children in Kuwait. METHODS This is a cross-sectional study of a representative sample of 6-18 years old school children, randomly selected from 244 schools in Kuwait. Anthropometric data was measured from 6574 students in September 2012-June 2013. Overweight and obesity have been defined in accordance with the Centres for Disease Control and Prevention (CDC), International Obesity Task Force (IOTF) and World Health Organization (WHO) 2007 criteria. RESULTS The prevalence estimate overweight was based on the three different systems (CDC = 17.7%, IOTF = 23.3%, WHO = 21.6%). The prevalence of obesity was (CDC = 33.9%, IOTF = 28.2%, WHO = 30.5%). Boys had a higher percentage of obesity regardless of the classification system used. CONCLUSIONS The prevalence of childhood obesity is alarmingly high in the State of Kuwait and exceeds the prevalence rates reported from neighbouring countries and from North America.
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Affiliation(s)
- N Elkum
- Sidra Medical and Research Centre, Doha, Qatar
| | - M Al-Arouj
- Dasman Diabetes Institute, Kuwait City, Kuwait
| | - M Sharifi
- University of Toronto, Toronto, Canada
| | - A Shaltout
- Dasman Diabetes Institute, Kuwait City, Kuwait
| | - A Bennakhi
- Dasman Diabetes Institute, Kuwait City, Kuwait
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Michaelis M, Rothweiler F, Loeschmann N, Sharifi M, Ghafourian T, Cinatl J. Enzastaurin inhibits ABCB1-mediated drug efflux independently of effects on protein kinase C signalling and the cellular p53 status. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32805-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Raevsky AV, Sharifi M, Samofalova DA, Karpov PA, Blume YB. 3D structure prediction of histone acetyltransferase proteins of the MYST family and their interactome in Arabidopsis thaliana. J Mol Model 2016; 22:256. [PMID: 27709438 DOI: 10.1007/s00894-016-3103-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 09/01/2016] [Indexed: 11/29/2022]
Abstract
Histone lysine acetylation is a reversible post-translational modification that does not involve changes in DNA sequences. Enzymes play an important role in developmental processes and their deregulation has been linked to the progression of diverse disorders. The HAT enzyme family fulfills an important role in various developmental processes mediated by the state of chromatin, and have been attributed to its deregulation. To understand acetylation mechanisms and their role in cell signaling, transcriptional regulation, and apoptosis, it is crucial to identify and analyze acetylation sites. Bioinformatics methods can be used to generate relatively precise predictions. Here we applied classical bioinformatics methods-sequence alignment, homology modeling, and docking-to compare approved and predicted lysine acetylation processes in different organisms. HAM1 and HAM2 are analogs of KAT8 and KAT7 (MYST1 and MYST2), members of the MYST histone acetyltransferase family, and our results show that HAM1 and HAM2 have much in common with other representatives of MYST families from various organisms. One function of acetyl-CoA binding was predicted with a high level of probability by computational methods. Based on our data, we conclude that, despite huge genetic distances and some structural differences between animal and plant species, a closer look at acetylation mechanism shows that they have much in common.
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Affiliation(s)
- A V Raevsky
- Laboratory of Structural Biology, Institute of Food Biotechnology and Genomics, National Academy of Sciences of Ukraine, 04123, Kyiv, Ukraine.
| | - M Sharifi
- Medway School of Pharmacy, Universities of Kent and Greenwich, Chatham, Kent, ME4 4TB, UK.,Division of Systems Biology, National Center for Toxicological Research, US Food and Drug Administration, Jefferson, AR, USA
| | - D A Samofalova
- Laboratory of Structural Biology, Institute of Food Biotechnology and Genomics, National Academy of Sciences of Ukraine, 04123, Kyiv, Ukraine
| | - P A Karpov
- Laboratory of Structural Biology, Institute of Food Biotechnology and Genomics, National Academy of Sciences of Ukraine, 04123, Kyiv, Ukraine
| | - Y B Blume
- Laboratory of Structural Biology, Institute of Food Biotechnology and Genomics, National Academy of Sciences of Ukraine, 04123, Kyiv, Ukraine
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Nedaeinia R, Sharifi M, Avan A, Kazemi M, Rafiee L, Ghayour-Mobarhan M, Salehi R. Locked nucleic acid anti-miR-21 inhibits cell growth and invasive behaviors of a colorectal adenocarcinoma cell line: LNA-anti-miR as a novel approach. Cancer Gene Ther 2016; 23:246-53. [PMID: 27364574 DOI: 10.1038/cgt.2016.25] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 05/04/2016] [Accepted: 05/09/2016] [Indexed: 12/21/2022]
Abstract
Colorectal cancer (CRC) is the third leading cause of cancer-related death and has an extremely poor prognosis. Dysregulation of microRNAs (miRNAs) has been shown to be involved in the pathogenesis and progression of many malignancies. Recent data suggest that microRNA-21 (miR-21) is significantly elevated in different types of cancer, especially colon adenocarcinoma. Against this background, locked nucleic acid (LNA)-modified oligonucleotides have recently been suggested as a novel approach for targeting miRNAs as antisense-based gene silencing. The aim of the current study was to explore the functional role of LNA-anti-miR-21 in a colon adenocarcinoma LS174T cell line. LS174T cells were transfected with LNA-anti-miR-21 for 24, 48 and 72 h. Quantitative real-time reverse transcriptase-PCR (qRT-PCR) was performed to assess miR-21 expression by LNA-anti-miR-21. The viability of the cells was evaluated by MTT (3-[4, 5-dimethylthiazol-2-yl]-2, 5-diphenyl tetrazolium bromide) assay and Annexin V/propidium iodide staining assay was used to detect apoptosis. Moreover, invasive behavior of the cells was evaluated before and after therapy by transwell assay. LNA-anti-miR-21 was successfully transfected in human LS174T cells and suppressed the endogenous miR-21. LNA-anti-miR-21 inhibited the cells' growth followed by induction of apoptosis. LNA-anti-miR-21 (50 pmol/μl) reduced the invasive behaviors of LS174T cells after 24 h, compared with untreated cells and scrambled LNA-transfected cells. However, this effect was more pronounced after 72 h. Our findings suggest the therapeutic potential of LNA-anti-miR-21 in a colon adenocarcinoma for targeting miR-21 expression. Further studies are warranted to investigate the molecular mechanisms underlying this novel inhibitor in colorectal cancer to establish its potential value for treatment of CRC patients with high miR-21 expression.
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Affiliation(s)
- R Nedaeinia
- Department of Medical Biotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Students Research Committee, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - M Sharifi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - A Avan
- Molecular Medicine Group, Department of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - M Kazemi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - L Rafiee
- Applied Physiology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - M Ghayour-Mobarhan
- Molecular Medicine Group, Department of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Biochemistry of Nutrition Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - R Salehi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Abstract
Background and Purpose: MicroRNAs are small non-coding RNAs with 19-24 nucleotides in length. Up- or down-regulation of many miRNAs has been shown by stimulation of Toll-like receptors (TLRs) in the innate immune system. Up-regulation of miR-146a has been reported by both TLR and heat-killed Candida albicans. In this study, we aimed to evaluate the expression of miR-146a in cultured monocyte-derived macrophages (MDMs) infected by Candida glabrata at 12, 24, and 48 hours. Materials and Methods: miR-146a expression was evaluated by qRT-real time polymerase chain reaction (PCR) at three time points in C. glabrata-infected MDMs. The data was analyzed using repeated measures ANOVA. Results: miR-146a expression was down-regulated in infected MDMs compared to the control group (P<0.018). The expression of miR-146a was at its highest level at 48 h, as compared to 12 and 24 h (P<0.018) .The differences between the experimental group compared to the control group were statistically significant (P<0.018). Conclusion: These results suggest that miR-146a can be involved in regulating macrophage function following TLR stimulation in C. glabrata-infected MDMs.
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Affiliation(s)
- B Arghavan
- Department of Medical Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - M Sharifi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - M Shafiee
- Department of Medical Genetics, School of Advanced Medical Technologies, Golestan University of Medical Sciences, Gorgan, Iran
| | - R Mohammadi
- Department of Medical Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.,Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
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Ahmadi S, Sharifi M, Salehi R. Locked nucleic acid inhibits miR-92a-3p in human colorectal cancer, induces apoptosis and inhibits cell proliferation. Cancer Gene Ther 2016; 23:199-205. [PMID: 27199220 DOI: 10.1038/cgt.2016.10] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 03/02/2016] [Accepted: 03/02/2016] [Indexed: 12/13/2022]
Abstract
MicroRNAs (miRNAs) are a type of small noncoding RNAs that have a vital role in basic biological processes such as cellular growth, division and apoptosis. A change in the expression of miRNAs can induce many diseases. Recently, the role of miRNA in some of the cancers as a tumor suppressor and oncogene has been recognized. Several studies have proved that miR-92a-3p acts as an oncogene in colorectal cancer (CRC). We studied CRC by inhibiting miR-92a-3p in SW48 cells (human colorectal cancer cell line) that were transfected with locked nucleic acid (LNA). At different times, the expression level of miR-92a-3p, cell vitality, apoptosis and necrosis were studied by qRT-PCR, MTT, Annexin-V and propidiumiodide. Our results showed that the expression of miR-92a-3p and proliferation of SW48 cells were decreased, and also a high percentage of SW48 cells were exposed to apoptosis and necrosis (P⩽0.005). Our study showed that the inhibition of miR-92a-3p with LNA inhibited cell proliferation and induced apoptosis and necrosis in CRC.
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Affiliation(s)
- S Ahmadi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - M Sharifi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - R Salehi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Sharifi M, Khoshgoftarmanesh AH, Hadadzadeh H. Changes in the chemical properties and swelling coefficient of alfalfa root cell walls in the presence of toluene as a toxic agent. Environ Sci Pollut Res Int 2016; 23:7022-7031. [PMID: 26728292 DOI: 10.1007/s11356-015-6008-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 12/22/2015] [Indexed: 06/05/2023]
Abstract
The influence of toluene pollution on the chemical properties and swelling coefficient of root cell walls in alfalfa (Medicago sativa L.) was investigated. Two sets of alfalfa seedlings were selected and one set was treated with 450 mg L(-1) toluene in the nutrient solution under hydroponic culture. Thirty days after treatment with toluene, alfalfa plants were harvested and the root cell walls were isolated. Fourier-transform infrared (FTIR) spectroscopy was carried out for the characterization of the root cell walls composition. The cation exchange capacity (CEC) and the swelling coefficient of the root cell walls (Kcw) were estimated at various pH values. The toluene contamination significantly reduced the mass of the cell wall material in the alfalfa roots. According to the FTIR spectra, the toluene pollution can change the alfalfa root cell wall properties by reducing the cell wall functional groups. These functional groups are probably related to the proteins and polysaccharides in the cell wall. Also, toluene pollution strongly reduced CEC and Kcw of the root cell walls. The results show that the decrease in the active sites of adsorption on the root cell walls as a response to toluene pollution can affect the water flow rate and the mineral nutrients uptake by roots.
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Affiliation(s)
- M Sharifi
- Department of Soil Science, College of Agriculture, Isfahan University of Technology, 84156-83111, Isfahan, Iran
| | - A H Khoshgoftarmanesh
- Department of Soil Science, College of Agriculture, Isfahan University of Technology, 84156-83111, Isfahan, Iran.
| | - H Hadadzadeh
- Department of Chemistry, Isfahan University of Technology, 84156-83111, Isfahan, Iran
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37
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Sharifi M, Gallivan A, Harvey D, Li KW, Futema M, Cooper J, Humphries S, Nair D. Atherosclerosis in monogenic Familial Hypercholesterolaemia versus polygenic hypercholesterolaemia. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2015.10.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Sharifi M, Bashtani M, Naserian A, Farhangfar H. The effect of feeding low quality date palm (Phoenix dactylifera L.) on the performance, antioxidant status and ruminal fermentation of mid-lactating Saanen dairy goats. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.07.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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39
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Elhami S, Sharifi M. Development of an efficient procedure for the preconcentration of copper(II) after solid phase extraction on modified sawdust. B CHEM SOC ETHIOPIA 2014. [DOI: 10.4314/bcse.v28i3.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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40
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Elkum N, Al-Arouj M, Sharifi M, Behbehani K, Bennakhi A. Cardiovascular disease risk factors in the South Asian population living in Kuwait: a cross-sectional study. Diabet Med 2014; 31:531-9. [PMID: 24344774 DOI: 10.1111/dme.12386] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 09/24/2013] [Accepted: 10/22/2013] [Indexed: 11/26/2022]
Abstract
BACKGROUND High rates of diabetes and cardiovascular disease have been reported in South Asian immigrants in many countries. However, the prevalence and characteristics of cardiovascular disease risk factors among a South Asian population living in Kuwait have not yet been investigated. This study was therefore designed to estimate the prevalence of cardiovascular disease risk factors and determine whether they are independently associated with diabetes in such a population. METHODS A population-based cross-sectional study was conducted on 1094 South Asians (781 men and 313 women), mainly Indian and Pakistani (≥ 18 years of age), of whom 75.1% were Indians. Interviews were carried out, during which socio-demographic and anthropometric data were collected, followed by a physical examination and collection of fasting blood samples for laboratory investigations. Diabetes was defined by fasting plasma glucose ≥ 7 mmol/l, or being on treatment, and/or self-reported previously diagnosed Type 2 diabetes. RESULTS The prevalence of diabetes was 21.1%, with 3.4% of that percentage of people being newly diagnosed. Using BMI measurements, 24.0% of those who participated in the study were obese and 46.1% were overweight. Dyslipidaemia was found in 77.6% and hypertension in 44.8%. Advancing age (≥ 40 years), male gender, high LDL, high total cholesterol, hypertension and positive family history of diabetes were significantly associated with increased risk of diabetes. CONCLUSION Our study shows that the prevalence of cardiovascular disease risk factors in South Asian expatriates in Kuwait exceeds prevalence rates reported in their homeland and other countries. This may suggest the added stress of environmental factors on the development of cardiovascular disease risk factors in such populations. Specialized prevention programmes targeting such high-risk ethnic populations are paramount and need to be implemented.
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Affiliation(s)
- N Elkum
- Dasman Diabetes Institute, Kuwait City, Kuwait
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Sharifi M, Vaissi S. Captive breeding and trial reintroduction of the Endangered yellow-spotted mountain newt Neurergus microspilotus in western Iran. ENDANGER SPECIES RES 2014. [DOI: 10.3354/esr00552] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Alarouj M, Bennakhi A, Alnesef Y, Sharifi M, Elkum N. Diabetes and associated cardiovascular risk factors in the State of Kuwait: the first national survey. Int J Clin Pract 2013; 67:89-96. [PMID: 23241053 DOI: 10.1111/ijcp.12064] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Cardiovascular diseases (CVD) are the leading cause of mortality worldwide as well as in Kuwait. People with diabetes have two to five times greater risk of developing CVD as compared with non-diabetic individuals. To date, little information exists on the prevalence and characteristics of cardiovascular risk factors in Kuwait. The objective of this survey was to address the growing burden of diabetes and related cardiovascular risk factors, and to estimate, for the first time, the prevalence of cardiovascular risk factors in the State of Kuwait. METHODS The study was carried out using the World Health Organization (WHO) STEPwise approach for surveillance of non-communicable disease risk factors. This study represents a national survey for Kuwaiti nationals aged between 20 and 65 years. All participants were involved in an interview for gathering sociodemographic information, underwent focused physical examination and donated a blood sample for the study-specific laboratory investigations. RESULTS A total of 1970 subjects, with a mean age of 48.9 ± 10.5, were screened. The prevalence of cardiovascular risk factors was as follows: diabetes 17.9%, dyslipidaemia 70.3%, hypertension 25.3% and obesity 48.2%. Over 62% had a sedentary lifestyle, and 17.8% were smokers. The prevalence of diabetes and dyslipidaemia increased with age and body mass index. Diabetes was also significantly associated with age above 40 years (OR = 10.5), family history of diabetes (OR = 2.79), hypertension (OR = 2.22), obesity (OR = 2.87) and lower literacy (OR = 4.23). CONCLUSIONS This study found that advancing age (≥ 40 years), diabetes mellitus, obesity, positive family history of diabetes, hypertension and dyslipidaemia are significant risk factors for developing CVD in Kuwait as in other parts of the world. Understanding these factors allows for preventive measures to be taken for Kuwaiti population.
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Affiliation(s)
- M Alarouj
- Dasman Diabetes Institute, Department of Clinical Services, Kuwait City, Kuwait Kuwait Ministry of Health, Kuwait City, Kuwait
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Koohmareh GA, Sharifi M. Synthesis, Characterization and Coordination Behavior of Zinc Supramolecular Polyurethane End-Capped with Terpyridine. Des Monomers Polym 2012. [DOI: 10.1163/138577210x12634696333235] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- G. A. Koohmareh
- a Department of Chemistry, Faculty of Science, University of Isfahan, Isfahan 81746-73441, Iran
| | - M. Sharifi
- b Department of Chemistry, Faculty of Science, University of Isfahan, Isfahan 81746-73441, Iran
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Munoz J, Sanchez BE, Sharifi M, Kostoff D, Ali HY, Hanbali AS, Kuriakose P, Wollner IS. Hypertension as a clinical marker of response to bevacizumab across malignancies. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e16601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Ciołkowski M, Sharifi M, Tarka S, Ciszek B. Median aperture of the fourth ventricle revisited. Folia Morphol (Warsz) 2011; 70:84-90. [PMID: 21630228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND The median aperture of Magendie is the largest of three openings of the fourth ventricle and thus it forms the main path for the outflow of the cerebrospinal fluid from the ventricle. The Magendie aperture connects the fourth ventricle with the cisterna magna and makes a natural corridor for neurosurgical approach and inspection of the ventricle and its floor. The purpose of this study was to give a contemporary anatomical view of this structure in the context of historical data. MATERIAL AND METHODS The Magendie foramen was studied in 30 fixed specimens of human brainstems with cerebella. The microdissection technique was used. Measurements were taken with a microscope ocular ruler. RESULTS The aperture is limited by the following structures: obex and gracile tubercles inferiorly, and tela choroidea with choroid plexus superolaterally. Obex tubercles usually have the form of a piece of neural tissue bridging two halves of the brainstem above the entrance to the central canal. Gracile tubercles together are 8.15 mm wide and the maximal width of the foramen is 6.53 mm. Tela choroidea attaches laterally at both sides to the inferior medullary velum. In most cases the right and left choroid plexus are connected to each other with a triangular membrane of tela choroidea, which protrudes through the median foramen and attaches to the vermis at a highly variable level. CONCLUSIONS We hope that the presented description of anatomical relations around the Magendie aperture, with its new measurements, will be helpful for those operating in the area and will explain some of the inaccuracies found in literature.
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Affiliation(s)
- M Ciołkowski
- Department of Descriptive and Clinical Anatomy, Medical University of Warsaw, Poland.
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Mousavi SR, Sharifi M, Mehdikhah Z. A comparison between the results of fissurectomy and lateral internal sphincterotomy in the surgical management of chronic anal fissure. J Gastrointest Surg 2009; 13:1279-82. [PMID: 19415396 DOI: 10.1007/s11605-009-0908-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Accepted: 04/15/2009] [Indexed: 01/31/2023]
Abstract
BACKGROUND We compare lateral internal sphincterotomy as an effective treatment of chronic fissure in ano to fissurectomy, which is as an alternative surgical treatment. METHODS Sixty two consecutive patients were divided into two groups through sequential sampling. Thirty patients underwent fissurectomy and 32 underwent lateral internal sphincterotomy. After a median follow-up of 22 months, we compared the results of the two procedures. In addition to frequent visits on a predetermined basis, a telephone inquiry into fissure recurrence and continence status was made. RESULTS All patients in both groups were pain-free and without bleeding within 1 week. In both groups, urinary retention was noted in one patient. Incontinence to flatus was noted in the fissurectomy (F) group in two (6.2%) patients, but no incontinence was noted in the lateral internal sphincterotomy (LIS) group. There was one patient (3.1%) with fissure recurrence in the F group but none in the LIS group. No patient in either group was afflicted with anal stenosis or perianal infections. All wounds healed within 8 weeks. Twenty nine patients (96.6%) in the LIS group and 28 (87.5%) in the F group reported satisfactory results with their procedure. CONCLUSION In the surgical treatment of chronic anal fissure not responding to conservative management, LIS may be the better treatment and, perhaps, the preferable surgical technique with fewer total complications (P < 0.005).
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Affiliation(s)
- S R Mousavi
- Shohada Hospital, Shahid Beheshti University of Medical Sciences and Health Services, Tajrish square, Tehran, Iran.
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Rickert WS, Joza PJ, Sharifi M, Wu J, Lauterbach JH. Reductions in the tobacco specific nitrosamine (TSNA) content of tobaccos taken from commercial Canadian cigarettes and corresponding reductions in TSNA deliveries in mainstream smoke from such cigarettes. Regul Toxicol Pharmacol 2008; 51:306-10. [PMID: 18508168 DOI: 10.1016/j.yrtph.2008.04.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2007] [Revised: 04/13/2008] [Accepted: 04/15/2008] [Indexed: 11/24/2022]
Abstract
Tobacco specific nitrosamines (TSNAs) are suspected to cause smoking-related neoplastic diseases. The change from direct-fired to indirect-fired barns (aka kilns) for curing bright (aka Virginia, flue-cured) tobaccos was made to reduce the TSNA concentrations. The effectiveness of such processes in reducing the deliveries of TSNAs to the users of the products should be monitored. However, it is difficult to assess the effects of this reduction on the TSNA levels in mainstream smoke when cigarette blends contain burley tobaccos and other blend components that can increase smoke TSNA concentrations. Canadian cigarettes made prior to and in the few years just after the conversion to indirect-fired curing should not be subject to such interferences. Thus, the TSNA content of tobaccos and mainstream smoke from six brands of Canadian cigarettes produced in 2003, 2004, and 2005 were determined. Reductions in NNK [4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone], the most important TSNA in flue-cured tobaccos, levels in the tobacco blends ranged from 60% to 85%. The corresponding reductions in mainstream smoke TSNA levels ranged from 59% to 72% (ISO smoking conditions) and 58-76% (Health Canada Intensive smoking conditions). These results show that other factors (microorganisms, nitrite levels) may be negating the TSNA reductions achieved by indirect-fired curing.
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Affiliation(s)
- W S Rickert
- Labstat International, ULC, 262 Manitou Drive, Kitchener, Ont., Canada N2C 1L3.
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Sharifi M, Kong F, Chin SL, Mineo H, Dyakov Y, Mebel AM, Chao SD, Hayashi M, Lin SH. Experimental and Theoretical Investigation of High-Power Laser Ionization and Dissociation of Methane. J Phys Chem A 2007; 111:9405-16. [PMID: 17764161 DOI: 10.1021/jp074053f] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The main purpose of this paper is to report the high-power laser ionization-dissociation of CH(4) at various femtosecond (fs) laser intensities (from 1 x 10(14) W/cm(2) to 2 x 10(15) W/cm(2)) with a laser pulse duration of 48 fs. The generalized molecular Keldysh theory has been applied to calculate the ionization yields for CH(4)+ and CH(4)++. Outside the influence of the fs intense laser, we propose to calculate the mass spectra due to the decomposition of CH(4)+ and CH(4)++, using the Rice-Ramsperger-Kassel-Marcus (RRKM) theory. The agreement between the experimental mass spectra and calculated mass spectra seems to be reasonable.
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Affiliation(s)
- M Sharifi
- Department of Physics, Engineering Physics and Optics, Laval University, Quebec City, Quebec, GIK 7P4, Canada
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Patel B, Sharifi M, Milward AD, Oberprieler NG, Gibbins JM, Parkin S, Naseem KM. Platelet nitric oxide synthase is activated by tyrosine dephosphorylation: possible role for SHP-1 phosphatase. J Thromb Haemost 2006; 4:2423-32. [PMID: 16898954 DOI: 10.1111/j.1538-7836.2006.02160.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND Endothelial nitric oxide synthase (eNOS) activity in endothelial cells is regulated by post-translational phosphorylation of critical serine, threonine and tyrosine residues in response to a variety of stimuli. However, the post-translational regulation of eNOS in platelets is poorly defined. OBJECTIVES We investigated the role of tyrosine phosphorylation in the regulation of platelet eNOS activity. METHODS Tyrosine phosphorylation of eNOS and interaction with the tyrosine phosphatase SHP-1 were investigated by coimmunoprecipitation and immunoblotting. An in vitro immunoassay was used to determine eNOS activity together with the contribution of protein tyrosine phosphorylation. RESULTS We found platelet eNOS was tyrosine phosphorylated under basal conditions. Thrombin induced a dose- and time-dependent increase in eNOS activity without altering overall level of tyrosine phosphorylation, although we did observe evidence of minor tyrosine dephosphorylation. In vitro tyrosine dephosphorylation of platelet eNOS using a recombinant protein tyrosine phosphatase enhanced thrombin-induced activity compared to thrombin alone, but had no effect on endothelial eNOS activity either at basal or after stimulation with bradykinin. Having shown that dephosphorylation could modulate platelet eNOS activity we examined the role of potential protein phosphatases important for platelet eNOS activity. We found SHP-1 protein tyrosine phosphatase, co-associated with platelet eNOS in resting platelets, but does not associate with eNOS in endothelial cells. Stimulation of platelets with thrombin increased SHP-1 association with eNOS, while inhibition of SHP-1 abolished the ability of thrombin to induce elevated eNOS activity. CONCLUSIONS Our data suggest a novel role for tyrosine dephosphorylation in platelet eNOS activation, which may be mediated by SHP-1.
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Affiliation(s)
- B Patel
- Medical Biosciences, University of Bradford, Bradford, UK
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