1
|
Tomasino AM, Olson JD, Schaaf GW, Cox AO, Furdui CM, Cline JM, Cohen EP. A New Method for Estimating Glomerular Filtration Rate in Rhesus Macaques (Macaca mulatta). Radiat Res 2023; 200:548-555. [PMID: 37902230 DOI: 10.1667/rade-23-00062.1] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 10/14/2023] [Indexed: 10/31/2023]
Abstract
Late effects of total- or partial-body irradiation include chronic kidney injury (CKI), which increases morbidity and mortality. Glomerular filtration rate (GFR) is the gold standard measure of kidney function. Renal function markers, such as blood urea nitrogen (BUN) and serum creatinine (Cr), may not be higher than reference ranges until 50% or more of nephrons are affected. Currently available methods to measure GFR are difficult and expensive, requiring multiple blood draws or timed urine collections, but their use can provide a framework for the development of simpler GFR estimates. The measurement of iohexol clearance is a validated tool used to determine GFR in veterinary patients. In this study, we aimed to determine if the Schwartz formula as used in human pediatric medicine can estimate GFR in rhesus macaques. We hypothesized that iohexol-GFR would correlate with the Schwartz formula-estimated GFR (eGFR) in irradiated and non-irradiated rhesus macaques. Twelve rhesus macaques [age 5-14 years (mean 7 years); 5 females, 7 males] with a range of BUN levels were selected for comparison to 4 non-irradiated controls (2 females, 2 males). Irradiated animals were divided by BUN into 3 groups: BUN ≤20 mg/dL (n = 4), BUN >20-24 mg/dL (n = 4), and BUN ≥25 mg/dL (n = 4). Baseline serum chemistry and urinalysis were used to assess renal function. For measurement of GFR, macaques were maintained under general anesthesia and received an intravenous injection of iohexol (2 mL/kg, 300 mg I/mL). Whole blood was collected at 10, 30, 60 and 90 min post-iohexol injection. Plasma iohexol concentrations were determined by mass spectrometry. GFR was calculated from the peak iohexol concentration and trapezoidal area under the curve (tAUC). The iohexol-GFR significantly correlated with the Schwartz formula-eGFR. In macaques with renal irradiation doses below 6 Gy, GFR was higher for males than females. GFR was lower in macaques with renal irradiation doses greater than 6 Gy compared to macaques with renal doses less than 6 Gy. We conclude that use of the Schwartz formula can provide a rapid, non-invasive, cost-effective, and accurate estimation of GFR to aid in the clinical assessment of renal function in irradiated rhesus macaques.
Collapse
Affiliation(s)
- Allison M Tomasino
- Section on Comparative Medicine, Department of Pathology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
- Animal Resources Department and
| | - John D Olson
- Section on Comparative Medicine, Department of Pathology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
- Animal Resources Department and
| | - George W Schaaf
- Section on Comparative Medicine, Department of Pathology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
- Animal Resources Department and
| | - Anderson O Cox
- Proteomics and Metabolomics Shared Resource, Atrium Health Wake Forest Baptist, Winston-Salem, North Carolina
| | - Cristina M Furdui
- Proteomics and Metabolomics Shared Resource, Atrium Health Wake Forest Baptist, Winston-Salem, North Carolina
- Section on Molecular Medicine, Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - J Mark Cline
- Section on Comparative Medicine, Department of Pathology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
- Animal Resources Department and
| | - Eric P Cohen
- Nephrology Division, Department of Medicine, NYU School of Medicine, New York, New York
| |
Collapse
|
2
|
Seramur ME, Sink S, Cox AO, Furdui CM, Key CCC. ABHD4 regulates adipocyte differentiation in vitro but does not affect adipose tissue lipid metabolism in mice. J Lipid Res 2023; 64:100405. [PMID: 37352974 PMCID: PMC10400869 DOI: 10.1016/j.jlr.2023.100405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 05/02/2023] [Accepted: 06/10/2023] [Indexed: 06/25/2023] Open
Abstract
Alpha/beta hydrolase domain-containing protein 4 (ABHD4) catalyzes the deacylation of N-acyl phosphatidyl-ethanolamine (NAPE) and lyso-NAPE to produce glycerophospho-N-acyl ethanolamine (GP-NAE). Through a variety of metabolic enzymes, NAPE, lyso-NAPE, and GP-NAE are ultimately converted into NAE, a group of bioactive lipids that control many physiological processes including inflammation, cognition, food intake, and lipolysis (i.e., oleoylethanolamide or OEA). In a diet-induced obese mouse model, adipose tissue Abhd4 gene expression positively correlated with adiposity. However, it is unknown whether Abhd4 is a causal or a reactive gene to obesity. To fill this knowledge gap, we generated an Abhd4 knockout (KO) 3T3-L1 pre-adipocyte. During adipogenic stimulation, Abhd4 KO pre-adipocytes had increased adipogenesis and lipid accumulation, suggesting Abhd4 is responding to (a reactive gene), not contributing to (not a causal gene), adiposity, and may serve as a mechanism for protecting against obesity. However, we did not observe any differences in adiposity and metabolic outcomes between whole-body Abhd4 KO or adipocyte-specific Abhd4 KO mice and their littermate control mice (both male and female) on chow or a high-fat diet. This might be because we found that deletion of Abhd4 did not affect NAE such as OEA production, even though Abhd4 was highly expressed in adipose tissue and correlated with fasting adipose OEA levels and lipolysis. These data suggest that ABHD4 regulates adipocyte differentiation in vitro but does not affect adipose tissue lipid metabolism in mice despite nutrient overload, possibly due to compensation from other NAPE and NAE metabolic enzymes.
Collapse
Affiliation(s)
- Mary E Seramur
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest University School of Medicine, Winston Salem, NC, USA
| | - Sandy Sink
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest University School of Medicine, Winston Salem, NC, USA
| | - Anderson O Cox
- Wake Forest Baptist Comprehensive Cancer Center Proteomics and Metabolomics Shared Resource, Wake Forest University School of Medicine, Winston Salem, NC, USA
| | - Cristina M Furdui
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest University School of Medicine, Winston Salem, NC, USA
| | - Chia-Chi Chuang Key
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest University School of Medicine, Winston Salem, NC, USA.
| |
Collapse
|
3
|
Ortega P, Hardin K, Pérez-Cordón C, Cox AO, Kim KC, Truesdale D, Chang R, Martínez GA, Miller De Rutté AM, Pérez-Muñoz C, Rolón L, Shin TM. An Overview of Online Resources for Medical Spanish Education for Effective Communication with Spanish-Speaking Patients. Teach Learn Med 2022; 34:481-493. [PMID: 34514918 DOI: 10.1080/10401334.2021.1959335] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
PHENOMENON Despite the rapid development of virtual medical Spanish educational materials, online resources lack transparency and a peer-review process. The purpose of this interdisciplinary study was to provide a critical inventory of virtual resources for medical Spanish education, thereby providing a panorama of the current state of online medical Spanish. APPROACH Research team members conducted iterative searches to identify medical Spanish online resources, which were then screened for predetermined inclusion/exclusion criteria. Between June and August 2020, a panel of medical and language experts then adapted and applied a previously published evaluation tool to determine whether resources that met study criteria would help learners achieve medical Spanish core competencies and to what extent each resource incorporated communicative language activities. Consensus meetings were conducted to resolve disagreements and identify gaps in online education. FINDINGS Out of 465 resources, 127 were further screened, and eight were selected for evaluation. Medical and language specialists independently scored each resource and, following discussions, achieved consensus. Overall, no resource met suitability criteria for all five medical Spanish learner competencies or cultural elements, and only one was suitable for achieving the self-assessment competency. INSIGHTS Interdisciplinary consensus meetings provide an important avenue for resolving differences of opinion and for integrating both language and medical perspectives into the evaluation process. Existing online resources should be used in conjunction with other materials to ensure that all core competencies for medical Spanish education are addressed. This study revealed important gaps in online resources, including a need to target advanced Spanish learners, apply authentic communicative activities, include assessment opportunities, and integrate culture in the learning program. Based on the current state of online medical Spanish, we offer recommendations for future resources.
Collapse
Affiliation(s)
- Pilar Ortega
- Departments of Emergency Medicine and Medical Education, University of Illinois College of Medicine, Chicago, Illinois, USA
| | - Karol Hardin
- Department of Modern Languages and Cultures, Baylor University, Waco, Texas, USA
| | - Cristina Pérez-Cordón
- Language and Communication Training Unit, United Nations Headquarters, New York, New York, USA
| | - Anderson O Cox
- Comprehensive Cancer Center, Wake Forest Baptist Medical Center, Winston-Salem, North Carolina, USA
| | - Kyle C Kim
- University of California Davis, Sacramento, California, USA
| | | | - Rocío Chang
- Department of Psychiatry, University of Connecticut Health, Farmington, Connecticut, USA
| | - Glenn A Martínez
- Department of Modern Languages and Literatures, University of Texas at San Antonio, San Antonio, Texas, USA
| | | | - Carmen Pérez-Muñoz
- Department of Spanish and Italian, Wake Forest University, Winston-Salem, North Carolina, USA
| | - Leticia Rolón
- Department of Medicine, University of California San Francisco, San Francisco, California, USA
| | - Tiffany M Shin
- Department of Pediatrics, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| |
Collapse
|
4
|
Wolff DW, Deng Z, Bianchi-Smiraglia A, Foley CE, Han Z, Wang X, Shen S, Rosenberg MM, Moparthy S, Yun DH, Chen J, Baker BK, Roll MV, Magiera AJ, Li J, Hurley E, Feltri ML, Cox AO, Lee J, Furdui CM, Liu L, Bshara W, LaConte LE, Kandel ES, Pasquale EB, Qu J, Hedstrom L, Nikiforov MA. Phosphorylation of guanosine monophosphate reductase triggers a GTP-dependent switch from pro- to anti-oncogenic function of EPHA4. Cell Chem Biol 2022; 29:970-984.e6. [PMID: 35148834 PMCID: PMC9620470 DOI: 10.1016/j.chembiol.2022.01.007] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 11/19/2021] [Accepted: 01/11/2022] [Indexed: 12/11/2022]
Abstract
Signal transduction pathways post-translationally regulating nucleotide metabolism remain largely unknown. Guanosine monophosphate reductase (GMPR) is a nucleotide metabolism enzyme that decreases GTP pools by converting GMP to IMP. We observed that phosphorylation of GMPR at Tyr267 is critical for its activity and found that this phosphorylation by ephrin receptor tyrosine kinase EPHA4 decreases GTP pools in cell protrusions and levels of GTP-bound RAC1. EPHs possess oncogenic and tumor-suppressor activities, although the mechanisms underlying switches between these two modes are poorly understood. We demonstrated that GMPR plays a key role in EPHA4-mediated RAC1 suppression. This supersedes GMPR-independent activation of RAC1 by EPHA4, resulting in a negative overall effect on melanoma cell invasion and tumorigenicity. Accordingly, EPHA4 levels increase during melanoma progression and inversely correlate with GMPR levels in individual melanoma tumors. Therefore, phosphorylation of GMPR at Tyr267 is a metabolic signal transduction switch controlling GTP biosynthesis and transformed phenotypes.
Collapse
Affiliation(s)
- David W. Wolff
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA,Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC 27157, USA
| | - Zhiyong Deng
- Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC 27157, USA
| | - Anna Bianchi-Smiraglia
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14203, USA
| | - Colleen E. Foley
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14203, USA
| | - Zhannan Han
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA,Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC 27157, USA
| | - Xingyou Wang
- Department of Chemistry, Brandeis University, Waltham, MA 02453, USA
| | - Shichen Shen
- Department of Pharmaceutical Sciences, University at Buffalo, Buffalo, NY 14214, USA
| | | | - Sudha Moparthy
- Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC 27157, USA
| | - Dong Hyun Yun
- Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC 27157, USA
| | - Jialin Chen
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA,Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC 27157, USA
| | - Brian K. Baker
- Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC 27157, USA
| | - Matthew V. Roll
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA,Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC 27157, USA
| | - Andrew J. Magiera
- Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC 27157, USA
| | - Jun Li
- Department of Pharmaceutical Sciences, University at Buffalo, Buffalo, NY 14214, USA
| | - Edward Hurley
- Department of Biochemistry and Neurology, Hunter James Kelly Research Institute, University at Buffalo, Buffalo NY, USA
| | - Maria Laura Feltri
- Department of Biochemistry and Neurology, Hunter James Kelly Research Institute, University at Buffalo, Buffalo NY, USA
| | - Anderson O. Cox
- Department of Internal Medicine, Section of Molecular Medicine, Wake Forest School of Medicine, Winston-Salem NC, USA
| | - Jingyun Lee
- Department of Internal Medicine, Section of Molecular Medicine, Wake Forest School of Medicine, Winston-Salem NC, USA
| | - Cristina M. Furdui
- Department of Internal Medicine, Section of Molecular Medicine, Wake Forest School of Medicine, Winston-Salem NC, USA
| | - Liang Liu
- Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC 27157, USA
| | - Wiam Bshara
- Department of Pathology, Roswell Park Comprehensive Cancer Center, Buffalo NY 14203, USA
| | - Leslie E.W. LaConte
- Fralin Biomedical Research Institute at Virginia Tech Carilion School of Medicine, Roanoke, VA 24016, USA
| | - Eugene S. Kandel
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14203, USA
| | - Elena B. Pasquale
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Jun Qu
- Department of Chemistry, Brandeis University, Waltham, MA 02453, USA
| | - Lizbeth Hedstrom
- Department of Chemistry, Brandeis University, Waltham, MA 02453, USA,Department of Biology, Brandeis University, Waltham, MA 02453, USA
| | - Mikhail A. Nikiforov
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA,Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC 27157, USA,Department of Pathology, Duke University School of Medicine, Durham, NC 27710, USA,Corresponding author and lead contact: Mikhail A. Nikiforov,
| |
Collapse
|
5
|
Kasica NP, Zhou X, Yang Q, Wang X, Yang W, Zimmermann HR, Holland CE, Koscielniak E, Wu H, Cox AO, Lee J, Ryazanov AG, Furdui CM, Ma T. Antagonists targeting eEF2 kinase rescue multiple aspects of pathophysiology in Alzheimer's disease model mice. J Neurochem 2021. [PMID: 34932218 DOI: 10.1111/jnc.15392] [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: 11/29/2022]
Abstract
It is imperative to develop novel therapeutic strategies for Alzheimer's disease (AD) and related dementia syndromes based on solid mechanistic studies. Maintenance of memory and synaptic plasticity relies on de novo protein synthesis, which is partially regulated by phosphorylation of eukaryotic elongation factor 2 (eEF2) via its kinase eEF2K. Abnormally increased eEF2 phosphorylation and impaired mRNA translation have been linked to AD. We recently reported that prenatal genetic suppression of eEF2K is able to prevent aging-related cognitive deficits in AD model mice, suggesting the therapeutic potential of targeting eEF2K/eEF2 signaling in AD. Here, we tested two structurally distinct small-molecule eEF2K inhibitors in two different lines of AD model mice after the onset of cognitive impairments. Our data revealed that treatment with eEF2K inhibitors improved AD-associated synaptic plasticity impairments and cognitive dysfunction, without altering brain amyloid β (Aβ) and tau pathology. Furthermore, eEF2K inhibition alleviated AD-associated defects in dendritic spine morphology, post-synaptic density formation, protein synthesis, and dendritic polyribosome assembly. Our results may offer critical therapeutic implications for AD, and the proof-of-principle study indicates translational implication of inhibiting eEF2K for AD and related dementia syndromes. Cover Image for this issue: https://doi.org/10.1111/jnc.15392.
Collapse
Affiliation(s)
- Nicole P Kasica
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Xueyan Zhou
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Qian Yang
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Xin Wang
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Wenzhong Yang
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Helena R Zimmermann
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Caroline E Holland
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Elizabeth Koscielniak
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Hanzhi Wu
- Department of Internal Medicine-Section on Molecular Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA.,Comprehensive Cancer Center, Wake Forest Baptist Medical Center, Winston-Salem, North Carolina, USA
| | - Anderson O Cox
- Department of Internal Medicine-Section on Molecular Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Jingyun Lee
- Department of Internal Medicine-Section on Molecular Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Alexey G Ryazanov
- Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey, USA
| | - Cristina M Furdui
- Department of Internal Medicine-Section on Molecular Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Tao Ma
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA.,Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA.,Department of Neurobiology and Anatomy, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| |
Collapse
|
6
|
Kasica NP, Zhou X, Yang Q, Wang X, Yang W, Zimmermann HR, Holland CE, Koscielniak E, Wu H, Cox AO, Lee J, Ryazanov AG, Furdui CM, Ma T. Antagonists targeting eEF2 kinase rescue multiple aspects of pathophysiology in Alzheimer’s disease model mice. J Neurochem 2021; 160:524-539. [PMID: 34932218 PMCID: PMC8902702 DOI: 10.1111/jnc.15562] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/06/2021] [Accepted: 12/09/2021] [Indexed: 11/30/2022]
Abstract
It is imperative to develop novel therapeutic strategies for Alzheimer's disease (AD) and related dementia syndromes based on solid mechanistic studies. Maintenance of memory and synaptic plasticity relies on de novo protein synthesis, which is partially regulated by phosphorylation of eukaryotic elongation factor 2 (eEF2) via its kinase eEF2K. Abnormally increased eEF2 phosphorylation and impaired mRNA translation have been linked to AD. We recently reported that prenatal genetic suppression of eEF2K is able to prevent aging-related cognitive deficits in AD model mice, suggesting the therapeutic potential of targeting eEF2K/eEF2 signaling in AD. Here, we tested two structurally distinct small-molecule eEF2K inhibitors in two different lines of AD model mice after the onset of cognitive impairments. Our data revealed that treatment with eEF2K inhibitors improved AD-associated synaptic plasticity impairments and cognitive dysfunction, without altering brain amyloid β (Aβ) and tau pathology. Furthermore, eEF2K inhibition alleviated AD-associated defects in dendritic spine morphology, post-synaptic density formation, protein synthesis, and dendritic polyribosome assembly. Our results may offer critical therapeutic implications for AD, and the proof-of-principle study indicates translational implication of inhibiting eEF2K for AD and related dementia syndromes. Cover Image for this issue: https://doi.org/10.1111/jnc.15392.
Collapse
Affiliation(s)
- Nicole P Kasica
- Department of Internal Medicine, Gerontology and Geriatric Medicine Wake Forest School of Medicine Winston‐Salem North Carolina USA
| | - Xueyan Zhou
- Department of Internal Medicine, Gerontology and Geriatric Medicine Wake Forest School of Medicine Winston‐Salem North Carolina USA
| | - Qian Yang
- Department of Internal Medicine, Gerontology and Geriatric Medicine Wake Forest School of Medicine Winston‐Salem North Carolina USA
| | - Xin Wang
- Department of Internal Medicine, Gerontology and Geriatric Medicine Wake Forest School of Medicine Winston‐Salem North Carolina USA
| | - Wenzhong Yang
- Department of Internal Medicine, Gerontology and Geriatric Medicine Wake Forest School of Medicine Winston‐Salem North Carolina USA
| | - Helena R Zimmermann
- Department of Internal Medicine, Gerontology and Geriatric Medicine Wake Forest School of Medicine Winston‐Salem North Carolina USA
| | - Caroline E Holland
- Department of Internal Medicine, Gerontology and Geriatric Medicine Wake Forest School of Medicine Winston‐Salem North Carolina USA
| | - Elizabeth Koscielniak
- Department of Internal Medicine, Gerontology and Geriatric Medicine Wake Forest School of Medicine Winston‐Salem North Carolina USA
| | - Hanzhi Wu
- Department of Internal Medicine‐Section on Molecular Medicine Wake Forest University School of Medicine Winston‐Salem NC 27157 USA
- Comprehensive Cancer Center Wake Forest Baptist Medical Center Winston‐Salem NC 27157 USA
| | - Anderson O Cox
- Department of Internal Medicine‐Section on Molecular Medicine Wake Forest University School of Medicine Winston‐Salem NC 27157 USA
| | - Jingyun Lee
- Department of Internal Medicine‐Section on Molecular Medicine Wake Forest University School of Medicine Winston‐Salem NC 27157 USA
| | - Alexey G Ryazanov
- Department of Pharmacology Rutgers Robert Wood Johnson Medical School Piscataway New Jersey USA
| | - Cristina M. Furdui
- Department of Internal Medicine‐Section on Molecular Medicine Wake Forest University School of Medicine Winston‐Salem NC 27157 USA
| | - Tao Ma
- Department of Internal Medicine, Gerontology and Geriatric Medicine Wake Forest School of Medicine Winston‐Salem North Carolina USA
- Department of Physiology and Pharmacology Wake Forest School of Medicine Winston‐Salem North Carolina USA
- Department of Neurobiology and Anatomy Wake Forest School of Medicine Winston‐Salem
| |
Collapse
|
7
|
Tesfay L, Paul BT, Konstorum A, Deng Z, Cox AO, Lee J, Furdui CM, Hegde P, Torti FM, Torti SV. Stearoyl-CoA Desaturase 1 Protects Ovarian Cancer Cells from Ferroptotic Cell Death. Cancer Res 2019; 79:5355-5366. [PMID: 31270077 DOI: 10.1158/0008-5472.can-19-0369] [Citation(s) in RCA: 278] [Impact Index Per Article: 55.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 06/04/2019] [Accepted: 06/27/2019] [Indexed: 12/14/2022]
Abstract
Activation of ferroptosis, a recently described mechanism of regulated cell death, dramatically inhibits growth of ovarian cancer cells. Given the importance of lipid metabolism in ferroptosis and the key role of lipids in ovarian cancer, we examined the contribution to ferroptosis of stearoyl-CoA desaturase (SCD1, SCD), an enzyme that catalyzes the rate-limiting step in monounsaturated fatty acid synthesis in ovarian cancer cells. SCD1 was highly expressed in ovarian cancer tissue, cell lines, and a genetic model of ovarian cancer stem cells. Inhibition of SCD1 induced lipid oxidation and cell death. Conversely, overexpression of SCD or exogenous administration of its C16:1 and C18:1 products, palmitoleic acid or oleate, protected cells from death. Inhibition of SCD1 induced both ferroptosis and apoptosis. Inhibition of SCD1 decreased CoQ10, an endogenous membrane antioxidant whose depletion has been linked to ferroptosis, while concomitantly decreasing unsaturated fatty acyl chains in membrane phospholipids and increasing long-chain saturated ceramides, changes previously linked to apoptosis. Simultaneous triggering of two death pathways suggests SCD1 inhibition may be an effective component of antitumor therapy, because overcoming this dual mechanism of cell death may present a significant barrier to the emergence of drug resistance. Supporting this concept, we observed that inhibition of SCD1 significantly potentiated the antitumor effect of ferroptosis inducers in both ovarian cancer cell lines and a mouse orthotopic xenograft model. Our results suggest that the use of combined treatment with SCD1 inhibitors and ferroptosis inducers may provide a new therapeutic strategy for patients with ovarian cancer. SIGNIFICANCE: The combination of SCD1 inhibitors and ferroptosis inducers may provide a new therapeutic strategy for the treatment of ovarian cancer patients.See related commentary by Carbone and Melino, p. 5149.
Collapse
Affiliation(s)
- Lia Tesfay
- Department of Molecular Biology and Biophysics, UConn Health, Farmington, Connecticut
| | - Bibbin T Paul
- Department of Molecular Biology and Biophysics, UConn Health, Farmington, Connecticut
| | - Anna Konstorum
- Center for Quantitative Medicine, UConn Health, Farmington, Connecticut
| | - Zhiyong Deng
- Department of Molecular Biology and Biophysics, UConn Health, Farmington, Connecticut
| | - Anderson O Cox
- Proteomics and Metabolomics Shared Resource, Comprehensive Cancer Center, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Jingyun Lee
- Proteomics and Metabolomics Shared Resource, Comprehensive Cancer Center, Wake Forest University School of Medicine, Winston-Salem, North Carolina
| | - Cristina M Furdui
- Proteomics and Metabolomics Shared Resource, Comprehensive Cancer Center, Wake Forest University School of Medicine, Winston-Salem, North Carolina.,Department of Internal Medicine, Section on Molecular Medicine, Wake Forest University Health Sciences, Winston-Salem, North Carolina
| | - Poornima Hegde
- Department of Pathology, UConn Health, Farmington, Connecticut
| | - Frank M Torti
- Department of Medicine, UConn Health, Farmington, Connecticut
| | - Suzy V Torti
- Department of Molecular Biology and Biophysics, UConn Health, Farmington, Connecticut.
| |
Collapse
|
8
|
Thomas BF, Lefever TW, Cortes RA, Grabenauer M, Kovach AL, Cox AO, Patel PR, Pollard GT, Marusich JA, Kevin RC, Gamage TF, Wiley JL. Thermolytic Degradation of Synthetic Cannabinoids: Chemical Exposures and Pharmacological Consequences. J Pharmacol Exp Ther 2017; 361:162-171. [PMID: 28087785 DOI: 10.1124/jpet.116.238717] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 01/12/2017] [Indexed: 12/12/2022] Open
Abstract
Synthetic cannabinoids are manufactured clandestinely with little quality control and are distributed as herbal "spice" for smoking or as bulk compound for mixing with a solvent and inhalation via electronic vaporizers. Intoxication with synthetic cannabinoids has been associated with seizure, excited delirium, coma, kidney damage, and other disorders. The chemical alterations produced by heating these structurally novel compounds for consumption are largely unknown. Here, we show that heating synthetic cannabinoids containing tetramethylcyclopropyl-ring substituents produced thermal degradants with pharmacological activity that varied considerably from their parent compounds. Moreover, these degradants were formed under conditions simulating smoking. Some products of combustion retained high affinity at the cannabinoid 1 (CB1) and CB2 receptors, were more efficacious than (-)-cis-3-[2-hydroxy-4-(1,1-dimethylheptyl)phenyl]-trans-4-(3-hydroxypropyl)cyclohexanol (CP55,940) in stimulating CB1 receptor-mediated guanosine 5'-O-(3-thiotriphosphate) (GTPγS) binding, and were potent in producing Δ9-tetrahydrocannabinol-like effects in laboratory animals, whereas other compounds had low affinity and efficacy and were devoid of cannabimimetic activity. Degradants that retained affinity and efficacy also substituted in drug discrimination tests for the prototypical synthetic cannabinoid 1-pentyl-3-(1-naphthoyl)indole (JWH-018), and are likely to produce psychotropic effects in humans. Hence, it is important to take into consideration the actual chemical exposures that occur during use of synthetic cannabinoid formulations to better comprehend the relationships between dose and effect.
Collapse
Affiliation(s)
- Brian F Thomas
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| | - Timothy W Lefever
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| | - Ricardo A Cortes
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| | - Megan Grabenauer
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| | - Alexander L Kovach
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| | - Anderson O Cox
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| | - Purvi R Patel
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| | - Gerald T Pollard
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| | - Julie A Marusich
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| | - Richard C Kevin
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| | - Thomas F Gamage
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| | - Jenny L Wiley
- RTI International, Research Triangle Park, North Carolina (B.F.T., T.W.L., R.A.C., M.G., A.L.K., A.O.C, P.R.P, J.A.M, T.F.G, J.L.W.); Howard Associates, LLC, Research Triangle Park, North Carolina (G.T.P.); and School of Psychology, The University of Sydney, NSW, Australia (R.C.K.)
| |
Collapse
|
9
|
Cox AO, Daw RC, Mason MD, Grabenauer M, Pande PG, Davis KH, Wiley JL, Stout PR, Thomas BF, Huffman JW. Use of SPME-HS-GC-MS for the analysis of herbal products containing synthetic cannabinoids. J Anal Toxicol 2012; 36:293-302. [PMID: 22582264 DOI: 10.1093/jat/bks025] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The increasing prevalence and use of herbal mixtures containing synthetic cannabinoids presents a growing public health concern and legal challenge for society. In contrast to the plant-derived cannabinoids in medical marijuana and other cannabinoid-based therapeutics, the commonly encountered synthetic cannabinoids in these mendaciously labeled products constitute a structurally diverse set of compounds of relatively unknown pharmacology and toxicology. Indeed, the use of these substances has been associated with an alarming number of hospitalizations and emergency room visits. Moreover, there are already several hundred known cannabinoid agonist compounds that could potentially be used for illicit purposes, posing an additional challenge for public health professionals and law enforcement efforts, which often require the detection and identification of the active ingredients for effective treatment or prosecution. A solid-phase microextraction headspace gas chromatography-mass spectrometry method is shown here to allow for rapid and reliable detection and structural identification of many of the synthetic cannabinoid compounds that are currently or could potentially be used in herbal smoking mixtures. This approach provides accelerated analysis and results that distinguish between structural analogs within several classes of cannabinoid compounds, including positional isomers. The analytical results confirm the continued manufacture and distribution of herbal materials with synthetic cannabinoids and provide insight into the manipulation of these products to avoid legal constraints and prosecution.
Collapse
Affiliation(s)
- Anderson O Cox
- RTI International, Research Triangle Park, NC 27709-2194, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|