1
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Wang W, Wang Y, Wagner KM, Lee RD, Hwang SH, Morisseau C, Wulff H, Hammock BD. Aflatoxin B 1 Increases Soluble Epoxide Hydrolase in the Brain and Induces Neuroinflammation and Dopaminergic Neurotoxicity. Int J Mol Sci 2023; 24:9938. [PMID: 37373086 PMCID: PMC10298596 DOI: 10.3390/ijms24129938] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 05/25/2023] [Revised: 06/06/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Parkinson's disease (PD) is an increasingly common neurodegenerative movement disorder with contributing factors that are still largely unexplored and currently no effective intervention strategy. Epidemiological and pre-clinical studies support the close association between environmental toxicant exposure and PD incidence. Aflatoxin B1 (AFB1), a hazardous mycotoxin commonly present in food and environment, is alarmingly high in many areas of the world. Previous evidence suggests that chronic exposure to AFB1 leads to neurological disorders as well as cancer. However, whether and how aflatoxin B1 contributes to the pathogenesis of PD is poorly understood. Here, oral exposure to AFB1 is shown to induce neuroinflammation, trigger the α-synuclein pathology, and cause dopaminergic neurotoxicity. This was accompanied by the increased expression and enzymatic activity of soluble epoxide hydrolase (sEH) in the mouse brain. Importantly, genetic deletion or pharmacological inhibition of sEH alleviated the AFB1-induced neuroinflammation by reducing microglia activation and suppressing pro-inflammatory factors in the brain. Furthermore, blocking the action of sEH attenuated dopaminergic neuron dysfunction caused by AFB1 in vivo and in vitro. Together, our findings suggest a contributing role of AFB1 to PD etiology and highlight sEH as a potential pharmacological target for alleviating PD-related neuronal disorders caused by AFB1 exposure.
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Affiliation(s)
- Weicang Wang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA 95616, USA; (W.W.); (Y.W.); (K.M.W.); (S.H.H.); (C.M.)
| | - Yuxin Wang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA 95616, USA; (W.W.); (Y.W.); (K.M.W.); (S.H.H.); (C.M.)
| | - Karen M. Wagner
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA 95616, USA; (W.W.); (Y.W.); (K.M.W.); (S.H.H.); (C.M.)
| | - Ruth Diana Lee
- Department of Pharmacology, University of California Davis, Davis, CA 95616, USA; (R.D.L.); (H.W.)
| | - Sung Hee Hwang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA 95616, USA; (W.W.); (Y.W.); (K.M.W.); (S.H.H.); (C.M.)
| | - Christophe Morisseau
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA 95616, USA; (W.W.); (Y.W.); (K.M.W.); (S.H.H.); (C.M.)
| | - Heike Wulff
- Department of Pharmacology, University of California Davis, Davis, CA 95616, USA; (R.D.L.); (H.W.)
| | - Bruce D. Hammock
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA 95616, USA; (W.W.); (Y.W.); (K.M.W.); (S.H.H.); (C.M.)
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2
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Wang W, Wagner KM, Wang Y, Singh N, Yang J, He Q, Morisseau C, Hammock BD. Soluble Epoxide Hydrolase Contributes to Cell Senescence and ER Stress in Aging Mice Colon. Int J Mol Sci 2023; 24:4570. [PMID: 36901999 PMCID: PMC10003560 DOI: 10.3390/ijms24054570] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 01/30/2023] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 03/03/2023] Open
Abstract
Aging, which is characterized by enhanced cell senescence and functional decline of tissues, is a major risk factor for many chronic diseases. Accumulating evidence shows that age-related dysfunction in the colon leads to disorders in multiple organs and systemic inflammation. However, the detailed pathological mechanisms and endogenous regulators underlying colon aging are still largely unknown. Here, we report that the expression and activity of the soluble epoxide hydrolase (sEH) enzyme are increased in the colon of aged mice. Importantly, genetic knockout of sEH attenuated the age-related upregulation of senescent markers p21, p16, Tp53, and β-galactosidase in the colon. Moreover, sEH deficiency alleviated aging-associated endoplasmic reticulum (ER) stress in the colon by reducing both the upstream regulators Perk and Ire1 as well as the downstream pro-apoptotic effectors Chop and Gadd34. Furthermore, treatment with sEH-derived linoleic acid metabolites, dihydroxy-octadecenoic acids (DiHOMEs), decreased cell viability and increased ER stress in human colon CCD-18Co cells in vitro. Together, these results support that the sEH is a key regulator of the aging colon, which highlights its potential application as a therapeutic target for reducing or treating age-related diseases in the colon.
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Affiliation(s)
- Weicang Wang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Karen M. Wagner
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Yuxin Wang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Nalin Singh
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Jun Yang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Qiyi He
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Christophe Morisseau
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Bruce D. Hammock
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, One Shields Avenue, Davis, CA 95616, USA
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3
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Nguyen PT, Nguyen HM, Wagner KM, Stewart R, Singh V, Thapa P, Tuan Ton A, Kondo RP, Ghetti A, Pennington MW, Hammock B, Griffith TN, Sack JT, Wulff H, Yarov-Yarovoy V. Computational design of peptides to target Na v1.7 channel with high potency and selectivity for the treatment of pain. Biophys J 2023; 122:309a. [PMID: 36783550 DOI: 10.1016/j.bpj.2022.11.1739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Affiliation(s)
- Phuong T Nguyen
- Department of Physiology and Membrane Biology, University of California Davis, Davis, CA, USA
| | - Hai M Nguyen
- Department of Pharmacology, University of California Davis, Davis, CA, USA
| | - Karen M Wagner
- Department of Entomology and Nematology, University of California Davis, Davis, CA, USA; Comprehensive Cancer Center, University of California Davis, Davis, CA, USA
| | - Robert Stewart
- Department of Physiology and Membrane Biology, University of California Davis, Davis, CA, USA
| | - Vikrant Singh
- Department of Pharmacology, University of California Davis, Davis, CA, USA
| | - Parashar Thapa
- Department of Physiology and Membrane Biology, University of California Davis, Davis, CA, USA
| | | | | | | | | | - Bruce Hammock
- Department of Entomology and Nematology, University of California Davis, Davis, CA, USA; Comprehensive Cancer Center, University of California Davis, Davis, CA, USA
| | - Theanne N Griffith
- Department of Physiology and Membrane Biology, University of California Davis, Davis, CA, USA
| | - Jon T Sack
- Department of Physiology and Membrane Biology, University of California Davis, Davis, CA, USA
| | - Heike Wulff
- Department of Pharmacology, University of California Davis, Davis, CA, USA
| | - Vladimir Yarov-Yarovoy
- Department of Physiology and Membrane Biology, University of California Davis, Davis, CA, USA
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4
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Takeshita AA, Hammock BD, Wagner KM. Soluble epoxide hydrolase inhibition alleviates chemotherapy induced neuropathic pain. Front Pain Res (Lausanne) 2023; 3:1100524. [PMID: 36700145 PMCID: PMC9868926 DOI: 10.3389/fpain.2022.1100524] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/15/2022] [Indexed: 01/12/2023]
Abstract
Chemotherapy induced peripheral neuropathy (CIPN) is a particularly pernicious form of neuropathy and the associated pain is the primary dose-limiting factor of life-prolonging chemotherapy treatment. The prevalence of CIPN is high and can last long after treatment has been stopped. Currently, late in the COVID-19 pandemic, there are still increased psychological pressures on cancer patients as well as additional challenges in providing analgesia for them. These include the risks of nonsteroidal anti-inflammatory drug (NSAID) analgesics potentially masking early infection symptoms and the immunosuppression of steroidal and opiate based approaches. Even without these concerns, CIPN is often inadequately treated with few therapies that offer significant pain relief. The experiments we report use soluble epoxide hydrolase inhibitors (sEHI) which relieved this intractable pain in preclinical models. Doses of EC5026, an IND candidate intended to treat neuropathic pain, elicited dose dependent analgesic responses in multiple models including platinum-based, taxane, and vinca alkaloid-based CIPN pain in Sprague Dawley rats. At the same time as a class, the sEHI are known to result in fewer debilitating side effects of other analgesics, likely due to their novel mechanism of action. Overall, the observed dose-dependent analgesia in both male and female rats across multiple models of chemotherapy induced neuropathic pain holds promise as a useful tool when translated to the clinic.
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Affiliation(s)
| | - Bruce D. Hammock
- EicOsis LLC, Davis, CA, United States,Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, United States
| | - Karen M. Wagner
- EicOsis LLC, Davis, CA, United States,Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, United States,Correspondence: Karen M. Wagner ;
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5
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Wang W, Wang Y, Yang J, Wagner KM, Hwang SH, Cheng J, Singh N, Edwards P, Morisseau C, Zhang G, Panigrahy D, Hammock BD. Aflatoxin B 1 exposure disrupts the intestinal immune function via a soluble epoxide hydrolase-mediated manner. Ecotoxicol Environ Saf 2023; 249:114417. [PMID: 36525946 PMCID: PMC9879385 DOI: 10.1016/j.ecoenv.2022.114417] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 11/22/2022] [Accepted: 12/09/2022] [Indexed: 05/05/2023]
Abstract
Aflatoxin B1 (AFB1) contamination in food and feed leads to severe global health problems. Acting as the frontier immunological barrier, the intestinal mucosa is constantly challenged by exposure to foodborne toxins such as AFB1 via contaminated diets, but the detailed toxic mechanism and endogenous regulators of AFB1 toxicity are still unclear. Here, we showed that AFB1 disrupted intestinal immune function by suppressing macrophages, especially M2 macrophages, and antimicrobial peptide-secreting Paneth cells. Using an oxylipinomics approach, we identified that AFB1 immunotoxicity is associated with decreased epoxy fatty acids, notably epoxyeicosatrienoic acids, and increased soluble epoxide hydrolase (sEH) levels in the intestine. Furthermore, sEH deficiency or inhibition rescued the AFB1-compromised intestinal immunity by restoring M2 macrophages as well as Paneth cells and their-derived lysozyme and α-defensin-3 in mice. Altogether, our study demonstrates that AFB1 exposure impairs intestinal immunity, at least in part, in a sEH-mediated way. Moreover, the present study supports the potential application of pharmacological intervention by inhibiting the sEH enzyme in alleviating intestinal immunotoxicity and associated complications caused by AFB1 global contamination.
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Affiliation(s)
- Weicang Wang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Yuxin Wang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Jun Yang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Karen M Wagner
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Sung Hee Hwang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Jeff Cheng
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Nalin Singh
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Patricia Edwards
- Center for Health and the Environment, University of California Davis, Davis, CA, USA
| | - Christophe Morisseau
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Guodong Zhang
- Department of Food Science and Technology, National University of Singapore, Singapore
| | - Dipak Panigrahy
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Bruce D Hammock
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA.
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6
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Wagner KM, Yang J, Morisseau C, Hammock BD. Soluble Epoxide Hydrolase Deletion Limits High-Fat Diet-Induced Inflammation. Front Pharmacol 2022; 12:778470. [PMID: 34975481 PMCID: PMC8719166 DOI: 10.3389/fphar.2021.778470] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 11/08/2021] [Indexed: 01/28/2023] Open
Abstract
The soluble epoxide hydrolase (sEH) enzyme is a major regulator of bioactive lipids. The enzyme is highly expressed in liver and kidney and modulates levels of endogenous epoxy-fatty acids, which have pleiotropic biological effects including limiting inflammation, neuroinflammation, and hypertension. It has been hypothesized that inhibiting sEH has beneficial effects on limiting obesity and metabolic disease as well. There is a body of literature published on these effects, but typically only male subjects have been included. Here, we investigate the role of sEH in both male and female mice and use a global sEH knockout mouse model to compare the effects of diet and diet-induced obesity. The results demonstrate that sEH activity in the liver is modulated by high-fat diets more in male than in female mice. In addition, we characterized the sEH activity in high fat content tissues and demonstrated the influence of diet on levels of bioactive epoxy-fatty acids. The sEH KO animals had generally increased epoxy-fatty acids compared to wild-type mice but gained less body weight on higher-fat diets. Generally, proinflammatory prostaglandins and triglycerides were also lower in livers of sEH KO mice fed HFD. Thus, sEH activity, prostaglandins, and triglycerides increase in male mice on high-fat diet but are all limited by sEH ablation. Additionally, these changes also occur in female mice though at a different magnitude and are also improved by knockout of the sEH enzyme.
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Affiliation(s)
- Karen M Wagner
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, United States
| | - Jun Yang
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, United States
| | - Christophe Morisseau
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, United States
| | - Bruce D Hammock
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, United States
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7
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Nguyen PT, Nguyen HM, Wagner KM, Stewart RG, Singh V, Thapa P, Chen YJ, Lillya MW, Ton AT, Kondo R, Ghetti A, Pennington MW, Hammock B, Griffith TN, Sack JT, Wulff H, Yarov-Yarovoy V. Computational design of peptides to target Na V1.7 channel with high potency and selectivity for the treatment of pain. eLife 2022; 11:81727. [PMID: 36576241 PMCID: PMC9831606 DOI: 10.7554/elife.81727] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 12/23/2022] [Indexed: 12/29/2022] Open
Abstract
The voltage-gated sodium NaV1.7 channel plays a key role as a mediator of action potential propagation in C-fiber nociceptors and is an established molecular target for pain therapy. ProTx-II is a potent and moderately selective peptide toxin from tarantula venom that inhibits human NaV1.7 activation. Here we used available structural and experimental data to guide Rosetta design of potent and selective ProTx-II-based peptide inhibitors of human NaV1.7 channels. Functional testing of designed peptides using electrophysiology identified the PTx2-3127 and PTx2-3258 peptides with IC50s of 7 nM and 4 nM for hNaV1.7 and more than 1000-fold selectivity over human NaV1.1, NaV1.3, NaV1.4, NaV1.5, NaV1.8, and NaV1.9 channels. PTx2-3127 inhibits NaV1.7 currents in mouse and human sensory neurons and shows efficacy in rat models of chronic and thermal pain when administered intrathecally. Rationally designed peptide inhibitors of human NaV1.7 channels have transformative potential to define a new class of biologics to treat pain.
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Affiliation(s)
- Phuong T Nguyen
- Department of Physiology and Membrane Biology, University of California DavisDavisUnited States
| | - Hai M Nguyen
- Department of Pharmacology, University of California DavisDavisUnited States
| | - Karen M Wagner
- Department of Entomology and Nematology & Comprehensive Cancer Center, University of California DavisDavisUnited States
| | - Robert G Stewart
- Department of Physiology and Membrane Biology, University of California DavisDavisUnited States
| | - Vikrant Singh
- Department of Pharmacology, University of California DavisDavisUnited States
| | - Parashar Thapa
- Department of Physiology and Membrane Biology, University of California DavisDavisUnited States
| | - Yi-Je Chen
- Department of Pharmacology, University of California DavisDavisUnited States
| | - Mark W Lillya
- Department of Physiology and Membrane Biology, University of California DavisDavisUnited States
| | | | | | | | | | - Bruce Hammock
- Department of Entomology and Nematology & Comprehensive Cancer Center, University of California DavisDavisUnited States
| | - Theanne N Griffith
- Department of Physiology and Membrane Biology, University of California DavisDavisUnited States
| | - Jon T Sack
- Department of Physiology and Membrane Biology, University of California DavisDavisUnited States,Department of Anesthesiology and Pain Medicine, University of California DavisDavisUnited States
| | - Heike Wulff
- Department of Pharmacology, University of California DavisDavisUnited States
| | - Vladimir Yarov-Yarovoy
- Department of Physiology and Membrane Biology, University of California DavisDavisUnited States,Department of Anesthesiology and Pain Medicine, University of California DavisDavisUnited States,Biophysics Graduate Group, University of California DavisDavisUnited States
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8
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Di Lucente J, Freitas HR, Wagner KM, Hammock BD, Maezawa I, Jin L. Efficacy of soluble epoxide hydrolase inhibition in a rat model of Alzheimer’s disease. Alzheimers Dement 2021. [DOI: 10.1002/alz.054073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | | | - Lee‐Way Jin
- University of California Davis Sacramento CA USA
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9
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Singh N, Barnych B, Wagner KM, Wan D, Morisseau C, Hammock BD. Adrenic Acid-Derived Epoxy Fatty Acids Are Naturally Occurring Lipids and Their Methyl Ester Prodrug Reduces Endoplasmic Reticulum Stress and Inflammatory Pain. ACS Omega 2021; 6:7165-7174. [PMID: 33748630 PMCID: PMC7970556 DOI: 10.1021/acsomega.1c00241] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 02/18/2021] [Indexed: 05/05/2023]
Abstract
Adrenic acid (AdA, 22:4) is an ω-6 polyunsaturated fatty acid (PUFA), derived from arachidonic acid. Like other PUFAs, it is metabolized by cytochrome P450s to a group of epoxy fatty acids (EpFAs), epoxydocosatrienoic acids (EDTs). EpFAs are lipid mediators with various beneficial bioactivities, including exertion of analgesia and reduction of endoplasmic reticulum (ER) stress, that are degraded to dihydroxy fatty acids by the soluble epoxide hydrolase (sEH). However, the biological characteristics and activities of EDTs are relatively unexplored, and, alongside dihydroxydocosatrienoic acids (DHDTs), they had not been detected in vivo. Herein, EDT and DHDT regioisomers were synthesized, purified, and used as standards for analysis with a selective and quantitative high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method. Biological verification in AdA-rich tissues suggests that basal metabolite levels are highest in the liver, with 16,17-EDT concentrations consistently being the greatest across the analyzed tissues. Enzyme hydrolysis assessment revealed that EDTs are sEH substrates, with greatest relative rate preference for the 13,14-EDT regioisomer. Pretreatment with an EDT methyl ester regioisomer mixture significantly reduced the onset of tunicamycin-stimulated ER stress in human embryonic kidney cells. Finally, administration of the regioisomeric mixture effectively alleviated carrageenan-induced inflammatory pain in rats. This study indicates that EDTs and DHDTs are naturally occurring lipids, and EDTs could be another therapeutically relevant group of EpFAs.
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10
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Wang Y, Wagner KM, Morisseau C, Hammock BD. Inhibition of the Soluble Epoxide Hydrolase as an Analgesic Strategy: A Review of Preclinical Evidence. J Pain Res 2021; 14:61-72. [PMID: 33488116 PMCID: PMC7814236 DOI: 10.2147/jpr.s241893] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [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: 10/13/2020] [Accepted: 12/08/2020] [Indexed: 12/16/2022] Open
Abstract
Chronic pain is a complicated condition which causes substantial physical, emotional, and financial impacts on individuals and society. However, due to high cost, lack of efficacy and safety problems, current treatments are insufficient. There is a clear unmet medical need for safe, nonaddictive and effective therapies in the management of pain. Epoxy-fatty acids (EpFAs), which are natural signaling molecules, play key roles in mediation of both inflammatory and neuropathic pain sensation. However, their molecular mechanisms of action remain largely unknown. Soluble epoxide hydrolase (sEH) rapidly converts EpFAs into less bioactive fatty acid diols in vivo; therefore, inhibition of sEH is an emerging therapeutic target to enhance the beneficial effect of natural EpFAs. In this review, we will discuss sEH inhibition as an analgesic strategy for pain management and the underlying molecular mechanisms.
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Affiliation(s)
- Yuxin Wang
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA 95616, USA
| | - Karen M Wagner
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA 95616, USA
| | - Christophe Morisseau
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA 95616, USA
| | - Bruce D Hammock
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA 95616, USA
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11
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Singh N, Barnych B, Morisseau C, Wagner KM, Wan D, Takeshita A, Pham H, Xu T, Dandekar A, Liu JY, Hammock BD. N-Benzyl-linoleamide, a Constituent of Lepidium meyenii (Maca), Is an Orally Bioavailable Soluble Epoxide Hydrolase Inhibitor That Alleviates Inflammatory Pain. J Nat Prod 2020; 83:3689-3697. [PMID: 33320645 PMCID: PMC7888481 DOI: 10.1021/acs.jnatprod.0c00938] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Lepidium meyenii (maca), a plant indigenous to the Peruvian Andes, recently has been utilized globally for claimed health or recreational benefits. The search for natural products that inhibit soluble epoxide hydrolase (sEH), with therapeutically relevant potencies and concentrations, led to the present study on bioactive amide secondary metabolites found in L. meyenii, the macamides. Based on known and suspected macamides, 19 possible macamides were synthesized and characterized. The majority of these amides displayed excellent inhibitory potency (IC50 ≈ 20-300 nM) toward the recombinant mouse, rat, and human sEH. Quantitative analysis of commercial maca products revealed that certain products contain known macamides (1-5, 8-12) at therapeutically relevant total concentrations (≥3.29 mg/g of root), while the inhibitory potency of L. meyenii extracts directly correlates with the sum of concentration/IC50 ratios of macamides present. Considering both its in vitro efficacy and high abundance in commercial products, N-benzyl-linoleamide (4) was identified as a particularly relevant macamide that can be utilized for in vivo studies. Following oral administration in the rat, compound 4 not only displayed acceptable pharmacokinetic characteristics but effectively reduced lipopolysaccharide-induced inflammatory pain. Inhibition of sEH by macamides provides a plausible biological mechanism of action to account for several beneficial effects previously observed with L. meyenii treatments.
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Affiliation(s)
- Nalin Singh
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, 95616, United States
| | - Bogdan Barnych
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, 95616, United States
| | - Christophe Morisseau
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, 95616, United States
| | - Karen M. Wagner
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, 95616, United States
| | - Debin Wan
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, 95616, United States
| | - Ashley Takeshita
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, 95616, United States
| | - Hoang Pham
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, 95616, United States
| | - Ting Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, People’s Republic of China
| | - Abhaya Dandekar
- Department of Plant Sciences, University of California Davis, Davis, CA, 95616, United States
| | - Jun-Yan Liu
- Institute of Life Sciences, Chongqing Medical University, Chongqing, 400016, People’s Republic of China
| | - Bruce D. Hammock
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA, 95616, United States
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12
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Li D, Cui Y, Morisseau C, Wagner KM, Cho YS, Hammock BD. Development of a Highly Sensitive Enzyme-Linked Immunosorbent Assay for Mouse Soluble Epoxide Hydrolase Detection by Combining a Polyclonal Capture Antibody with a Nanobody Tracer. Anal Chem 2020; 92:11654-11663. [PMID: 32786492 DOI: 10.1021/acs.analchem.0c01511] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Enzyme-linked immunosorbent assays (ELISA) for the detection of soluble epoxide hydrolase (sEH), a key enzyme in the metabolism of fatty acids and a biomarker, may increasingly represent an important diagnostic tool. However, there is a lack of ELISAs for mouse sEH quantification, thus resulting in a bottleneck in understanding the pathogenesis of many diseases related to sEH based on mouse models. In this work, nanobodies recognizing mouse sEH were obtained through rebiopanning against mouse sEH in the previous phage display library of human sEH. Later, we developed four ELISAs involving a combination of anti-mouse sEH polyclonal antibodies (pAbs) and nanobodies. It was found that the double antibodies worked as dual filters and had a huge impact on both the sensitivity and selectivity of sandwich immunoassays. The switch from anti-human sEH pAbs to anti-mouse sEH pAbs led to over a 100-fold increase in the sensitivity and a dramatic decrease of the limit of detection to a picogram per milliliter range in format B (pAb/biotin-VHH/streptavidin-poly-horseradish peroxidase). Moreover, we found that the four sandwich ELISAs might demonstrate excellent selectivities to mouse sEH, despite the antibodies alone showing significant cross-reactivity to the matrix, indicating the enhanced selectivity of double antibodies as dual filters. Eventually, for the first time, the ELISA (format B) was successfully used to measure the mouse sEH level in cancer cells with ultralow abundances. The ELISAs proposed here represent a sensitive tool for tracking sEH in various biological processes and also provide deep insights into developing sandwich immunoassays against various targets in terms of both the sensitivity and selectivity.
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Affiliation(s)
- Dongyang Li
- Department of Entomology and Nematology, University of California, Davis, Comprehensive Cancer Center, University of California, Davis, Davis, California 95616, United States
| | - Yongliang Cui
- Department of Entomology and Nematology, University of California, Davis, Comprehensive Cancer Center, University of California, Davis, Davis, California 95616, United States.,Citrus Research Institute, Southwest University and National Citrus Engineering Research Center, Chongqing 400712, China
| | - Christophe Morisseau
- Department of Entomology and Nematology, University of California, Davis, Comprehensive Cancer Center, University of California, Davis, Davis, California 95616, United States
| | - Karen M Wagner
- Department of Entomology and Nematology, University of California, Davis, Comprehensive Cancer Center, University of California, Davis, Davis, California 95616, United States
| | - Young Sik Cho
- Department of Entomology and Nematology, University of California, Davis, Comprehensive Cancer Center, University of California, Davis, Davis, California 95616, United States.,Department of Pharmacy, Keimyung University, Daegu 42601, South Korea
| | - Bruce D Hammock
- Department of Entomology and Nematology, University of California, Davis, Comprehensive Cancer Center, University of California, Davis, Davis, California 95616, United States
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13
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Abstract
The role of lipids in pain signaling is well established and built on decades of knowledge about the pain and inflammation produced by prostaglandin and leukotriene metabolites of cyclooxygenase and lipoxygenase metabolism, respectively. The analgesic properties of other lipid metabolites are more recently coming to light. Lipid metabolites have been observed to act directly at ion channels and G protein-coupled receptors on nociceptive neurons as well as act indirectly at cellular membranes. Cytochrome P450 metabolism of specifically long-chain fatty acids forms epoxide metabolites, the epoxy-fatty acids (EpFA). The biological role of these metabolites has been found to mediate analgesia in several types of pain pathology. EpFA act through a variety of direct and indirect mechanisms to limit pain and inflammation including nuclear receptor agonism, limiting endoplasmic reticulum stress and blocking mitochondrial dysfunction. Small molecule inhibitors of the soluble epoxide hydrolase can stabilize the EpFA in vivo, and this approach has demonstrated relief in preclinical modeled pain pathology. Moreover, the ability to block neuroinflammation extends the potential benefit of targeting soluble epoxide hydrolase to maintain EpFA for neuroprotection in neurodegenerative disease.
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Affiliation(s)
- Karen M Wagner
- Department of Entomology and Nematology and University of California Davis Comprehensive Cancer Center, University of California Davis, One Shields Avenue, Davis, California, 95616, USA
| | - Aldrin Gomes
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, California, USA
| | - Cindy B McReynolds
- Department of Entomology and Nematology and University of California Davis Comprehensive Cancer Center, University of California Davis, One Shields Avenue, Davis, California, 95616, USA
| | - Bruce D Hammock
- Department of Entomology and Nematology and University of California Davis Comprehensive Cancer Center, University of California Davis, One Shields Avenue, Davis, California, 95616, USA.
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14
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Lee KSS, Yang J, Niu J, Ng CJ, Wagner KM, Dong H, Kodani SD, Wan D, Morisseau C, Hammock BD. Drug-Target Residence Time Affects in Vivo Target Occupancy through Multiple Pathways. ACS Cent Sci 2019; 5:1614-1624. [PMID: 31572788 PMCID: PMC6764161 DOI: 10.1021/acscentsci.9b00770] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Indexed: 06/10/2023]
Abstract
The drug discovery and development process is greatly hampered by difficulties in translating in vitro potency to in vivo efficacy. Recent studies suggest that the long-neglected drug-target residence time parameter complements classical drug affinity parameters (K I, K d, IC50, or EC50) and is a better predictor of in vivo efficacy. Compounds with a long drug-target residence time are often more efficacious in vivo. The impact, however, of the drug-target residence time on in vivo efficacy remains controversial due to difficulties in experimentally determining the in vivo target occupancy during drug treatment. To tackle this problem, an in vivo displacement assay was developed using soluble epoxide hydrolase as a biological model. In this report, we experimentally demonstrated that drug-target residence time affects the duration of in vivo drug-target binding. In addition, the drug-target residence time plays an important role in modulating the rate of drug metabolism which also affects the efficacy of the drug.
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Affiliation(s)
- Kin Sing Stephen Lee
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
- Department
of Pharmacology and Toxicology and Department of Chemistry, Michigan State University, 1355 Bogue Street, East
Lansing, Michigan 48824, United States
| | - Jun Yang
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Jun Niu
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Connie J. Ng
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Karen M. Wagner
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Hua Dong
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Sean D. Kodani
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Debin Wan
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Christophe Morisseau
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Bruce D. Hammock
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
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15
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Wan D, Yang J, McReynolds CB, Barnych B, Wagner KM, Morisseau C, Hwang SH, Sun J, Blöcher R, Hammock BD. In vitro and in vivo Metabolism of a Potent Inhibitor of Soluble Epoxide Hydrolase, 1-(1-Propionylpiperidin-4-yl)-3-(4-(trifluoromethoxy)phenyl)urea. Front Pharmacol 2019; 10:464. [PMID: 31143115 PMCID: PMC6520522 DOI: 10.3389/fphar.2019.00464] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 02/07/2019] [Accepted: 04/12/2019] [Indexed: 12/13/2022] Open
Abstract
1-(1-Propionylpiperidin-4-yl)-3-(4-(trifluoromethoxy)phenyl)urea (TPPU) is a potent soluble epoxide hydrolase (sEH) inhibitor that is used extensively in research for modulating inflammation and protecting against hypertension, neuropathic pain, and neurodegeneration. Despite its wide use in various animal disease models, the metabolism of TPPU has not been well-studied. A broader understanding of its metabolism is critical for determining contributions of metabolites to the overall safety and effectiveness of TPPU. Herein, we describe the identification of TPPU metabolites using LC-MS/MS strategies. Four metabolites of TPPU (M1–M4) were identified from rat urine by a sensitive and specific LC-MS/MS method with double precursor ion scans. Their structures were further supported by LC-MS/MS comparison with synthesized standards. Metabolites M1 and M2 were formed from hydroxylation on a propionyl group of TPPU; M3 was formed by amide hydrolysis of the 1-propionylpiperdinyl group on TPPU; and M4 was formed by further oxidation of the hydroxylated metabolite M2. Interestingly, the predicted α-keto amide metabolite and 4-(trifluoromethoxy)aniline (metabolite from urea cleavage) were not detected by the LC-MRM-MS method. This indicates that if formed, the two potential metabolites represent <0.01% of TPPU metabolism. Species differences in the formation of these four identified metabolites was assessed using liver S9 fractions from dog, monkey, rat, mouse, and human. M1, M2, and M3 were generated in liver S9 fractions from all species, and higher amounts of M3 were generated in monkey S9 fractions compared to other species. In addition, rat and human S9 metabolism showed the highest species similarity based on the quantities of each metabolite. The presence of all four metabolites were confirmed in vivo in rats over 72-h post single oral dose of TPPU. Urine and feces were major routes for TPPU excretion. M1, M4 and parent drug were detected as major substances, and M2 and M3 were minor substances. In blood, M1 accounted for ~9.6% of the total TPPU-related exposure, while metabolites M2, M3, and M4 accounted for <0.4%. All four metabolites were potent inhibitors of human sEH but were less potent than the parent TPPU. In conclusion, TPPU is metabolized via oxidation and amide hydrolysis without apparent breakdown of the urea. The aniline metabolites were not observed either in vitro or in vivo. Our findings increase the confidence in the ability to translate preclinical PK of TPPU in rats to humans and facilitates the potential clinical development of TPPU and other sEH inhibitors.
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Affiliation(s)
- Debin Wan
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Jun Yang
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Cindy B McReynolds
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Bogdan Barnych
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Karen M Wagner
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Christophe Morisseau
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Sung Hee Hwang
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Jia Sun
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States.,State Forestry Administration Key Open Laboratory, International Center for Bamboo and Rattan, Beijing, China
| | - René Blöcher
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Bruce D Hammock
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
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16
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Hiesinger K, Wagner KM, Hammock BD, Proschak E, Hwang SH. Development of multitarget agents possessing soluble epoxide hydrolase inhibitory activity. Prostaglandins Other Lipid Mediat 2019; 140:31-39. [PMID: 30593866 PMCID: PMC6345559 DOI: 10.1016/j.prostaglandins.2018.12.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 07/26/2018] [Revised: 11/27/2018] [Accepted: 12/24/2018] [Indexed: 02/08/2023]
Abstract
Over the last two decades polypharmacology has emerged as a new paradigm in drug discovery, even though developing drugs with high potency and selectivity toward a single biological target is still a major strategy. Often, targeting only a single enzyme or receptor shows lack of efficacy. High levels of inhibitor of a single target also can lead to adverse side effects. A second target may offer additive or synergistic effects to affecting the first target thereby reducing on- and off-target side effects. Therefore, drugs that inhibit multiple targets may offer a great potential for increased efficacy and reduced the adverse effects. In this review we summarize recent findings of rationally designed multitarget compounds that are aimed to improve efficacy and safety profiles compared to those that target a single enzyme or receptor. We focus on dual inhibitors/modulators that target the soluble epoxide hydrolase (sEH) as a common part of their design to take advantage of the beneficial effects of sEH inhibition.
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Affiliation(s)
- Kerstin Hiesinger
- Institute of Pharmaceutical Chemistry, Goethe-University of Frankfurt, Max-von-Laue Str. 9, D-60439, Frankfurt am Main, Germany
| | - Karen M Wagner
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Bruce D Hammock
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Ewgenij Proschak
- Institute of Pharmaceutical Chemistry, Goethe-University of Frankfurt, Max-von-Laue Str. 9, D-60439, Frankfurt am Main, Germany
| | - Sung Hee Hwang
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA.
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17
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Kodani SD, Wan D, Wagner KM, Hwang SH, Morisseau C, Hammock BD. Design and Potency of Dual Soluble Epoxide Hydrolase/Fatty Acid Amide Hydrolase Inhibitors. ACS Omega 2018; 3:14076-14086. [PMID: 30411058 PMCID: PMC6210075 DOI: 10.1021/acsomega.8b01625] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 09/04/2018] [Indexed: 06/08/2023]
Abstract
Fatty acid amide hydrolase (FAAH) is responsible for regulating concentrations of the endocannabinoid arachidonoyl ethanolamide. Multiple FAAH inhibitors have been developed for clinical trials and have failed to demonstrate efficacy at treating pain, despite promising preclinical data. One approach toward increasing the efficacy of FAAH inhibitors is to concurrently inhibit other targets responsible for regulating pain. Here, we designed dual inhibitors targeting the enzymes FAAH and soluble epoxide hydrolase (sEH), which are targets previously shown to synergize at reducing inflammatory and neuropathic pain. Exploration of the sEH/FAAH inhibitor structure-activity relationship started with PF-750, a FAAH inhibitor (IC50 = 19 nM) that weakly inhibited sEH (IC50 = 640 nM). Potency was optimized resulting in an inhibitor with improved potency on both targets (11, sEH IC50 = 5 nM, FAAH IC50 = 8 nM). This inhibitor demonstrated good target selectivity, pharmacokinetic properties (AUC = 1200 h nM, t 1/2 = 4.9 h in mice), and in vivo target engagement.
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18
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Lee KSS, Liu JY, Wagner KM, Pakhomova S, Dong H, Morisseau C, Fu SH, Yang J, Wang P, Ulu A, Mate CA, Nguyen LV, Hwang SH, Edin ML, Mara AA, Wulff H, Newcomer ME, Zeldin DC, Hammock BD. Correction to Optimized Inhibitors of Soluble Epoxide Hydrolase Improve in Vitro Target Residence Time and in Vivo Efficacy. J Med Chem 2018; 61:4271. [PMID: 29701466 PMCID: PMC5949719 DOI: 10.1021/acs.jmedchem.8b00582] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Blöcher R, Wagner KM, Gopireddy RR, Harris TR, Wu H, Barnych B, Hwang SH, Xiang YK, Proschak E, Morisseau C, Hammock BD. Orally Available Soluble Epoxide Hydrolase/Phosphodiesterase 4 Dual Inhibitor Treats Inflammatory Pain. J Med Chem 2018; 61:3541-3550. [PMID: 29614224 PMCID: PMC5933862 DOI: 10.1021/acs.jmedchem.7b01804] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Inspired by previously discovered enhanced analgesic efficacy between soluble epoxide hydrolase (sEH) and phosphodiesterase 4 (PDE4) inhibitors, we designed, synthesized and characterized 21 novel sEH/PDE4 dual inhibitors. The best of these displayed good efficacy in in vitro assays. Further pharmacokinetic studies of a subset of four selected compounds led to the identification of a bioavailable dual inhibitor N-(4-methoxy-2-(trifluoromethyl)benzyl)-1-propionylpiperidine-4-carboxamide (MPPA). In a lipopolysaccharide induced inflammatory pain rat model, MPPA rapidly increased in the blood ( Tmax = 30 min; Cmax = 460 nM) after oral administration of 3 mg/kg and reduced inflammatory pain with rapid onset of action correlating with blood levels over a time course of 4 h. Additionally, MPPA does not alter self-motivated exploration of rats with inflammatory pain or the withdrawal latency in control rats.
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Affiliation(s)
- René Blöcher
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, One Shields Avenue, CA 95616, Davis, U.S.A
| | - Karen M. Wagner
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, One Shields Avenue, CA 95616, Davis, U.S.A
| | - Raghavender R. Gopireddy
- Department of Pharmacology, University of California Davis, One Shields Avenue, CA 95616, Davis, U.S.A., and VA Northern California Health Care System, CA 95655 Mather, U.S.A
| | - Todd R. Harris
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, One Shields Avenue, CA 95616, Davis, U.S.A
| | - Hao Wu
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, One Shields Avenue, CA 95616, Davis, U.S.A
| | - Bogdan Barnych
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, One Shields Avenue, CA 95616, Davis, U.S.A
| | - Sung Hee Hwang
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, One Shields Avenue, CA 95616, Davis, U.S.A
| | - Yang K. Xiang
- Department of Pharmacology, University of California Davis, One Shields Avenue, CA 95616, Davis, U.S.A., and VA Northern California Health Care System, CA 95655 Mather, U.S.A
| | - Ewgenij Proschak
- Institute of Pharmaceutical Chemistry, Goethe-University Frankfurt, Max-von-Laue-Strasse 9, D-60438 Frankfurt am Main, Germany
| | - Christophe Morisseau
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, One Shields Avenue, CA 95616, Davis, U.S.A
| | - Bruce D. Hammock
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, One Shields Avenue, CA 95616, Davis, U.S.A
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20
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Wan D, Yang J, McReynolds CB, Wagner KM, Barnych B, Morisseau C, Sun J, Hwang SH, Hammock BD. In Vitro and In Vivo Metabolism of Soluble Epoxide Hydrolase Inhibitor 1‐ Trifluoromethoxyphenyl‐3‐(1‐propionylpiperidin‐4‐yl) Urea (TPPU). FASEB J 2018. [DOI: 10.1096/fasebj.2018.32.1_supplement.558.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Debin Wan
- Department of Entomology and NematologyUniversity of CaliforniaDavisDavisCA
| | - Jun Yang
- Department of Entomology and NematologyUniversity of CaliforniaDavisDavisCA
| | | | - Karen M. Wagner
- Department of Entomology and NematologyUniversity of CaliforniaDavisDavisCA
| | - Bogdan Barnych
- Department of Entomology and NematologyUniversity of CaliforniaDavisDavisCA
| | | | - Jia Sun
- Department of Entomology and NematologyUniversity of CaliforniaDavisDavisCA
| | - Sung Hee Hwang
- Department of Entomology and NematologyUniversity of CaliforniaDavisDavisCA
| | - Bruce D. Hammock
- Department of Entomology and NematologyUniversity of CaliforniaDavisDavisCA
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21
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Wagner KM, McReynolds CB, Schmidt WK, Hammock BD. Soluble epoxide hydrolase as a therapeutic target for pain, inflammatory and neurodegenerative diseases. Pharmacol Ther 2017. [PMID: 28642117 DOI: 10.1016/j.pharmthera.2017.06.006] [Citation(s) in RCA: 168] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Eicosanoids are biologically active lipid signaling molecules derived from polyunsaturated fatty acids. Many of the actions of eicosanoid metabolites formed by cyclooxygenase and lipoxygenase enzymes have been characterized, however, the epoxy-fatty acids (EpFAs) formed by cytochrome P450 enzymes are newly described by comparison. The EpFA metabolites modulate a diverse set of physiologic functions that include inflammation and nociception among others. Regulation of EpFAs occurs primarily via release, biosynthesis and enzymatic transformation by the soluble epoxide hydrolase (sEH). Targeting sEH with small molecule inhibitors has enabled observation of the biological activity of the EpFAs in vivo in animal models, greatly contributing to the overall understanding of their role in the inflammatory response. Their role in modulating inflammation has been demonstrated in disease models including cardiovascular pathology and inflammatory pain, but extends to neuroinflammation and neuroinflammatory disease. Moreover, while EpFAs demonstrate activity against inflammatory pain, interestingly, this action extends to blocking chronic neuropathic pain as well. This review outlines the role of modulating sEH and the biological action of EpFAs in models of pain and inflammatory diseases.
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Affiliation(s)
- Karen M Wagner
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA 95616, United States
| | - Cindy B McReynolds
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA 95616, United States
| | | | - Bruce D Hammock
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California Davis, Davis, CA 95616, United States.
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22
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Ngo H, Latona R, Wagner KM, Nuñez A, Ashby R, Dunn RO. Synthesis and low temperature characterization of iso‐oleic ester derivatives. EUR J LIPID SCI TECH 2016. [DOI: 10.1002/ejlt.201500468] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Helen Ngo
- U.S. Department of AgricultureAgricultural Research ServiceEastern Regional Research CenterWyndmoorPA
| | - Renee Latona
- U.S. Department of AgricultureAgricultural Research ServiceEastern Regional Research CenterWyndmoorPA
| | - Karen M. Wagner
- U.S. Department of AgricultureAgricultural Research ServiceEastern Regional Research CenterWyndmoorPA
| | - Alberto Nuñez
- U.S. Department of AgricultureAgricultural Research ServiceEastern Regional Research CenterWyndmoorPA
| | - Richard Ashby
- U.S. Department of AgricultureAgricultural Research ServiceEastern Regional Research CenterWyndmoorPA
| | - Robert O. Dunn
- U.S. Department of AgricultureAgricultural Research ServiceNational Center for Agricultural Utilization ResearchPeoriaIL
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24
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Lee KSS, Liu JY, Wagner KM, Pakhomova S, Dong H, Morisseau C, Fu SH, Yang J, Wang P, Ulu A, Mate CA, Nguyen LV, Hwang SH, Edin ML, Mara AA, Wulff H, Newcomer ME, Zeldin DC, Hammock BD. Optimized inhibitors of soluble epoxide hydrolase improve in vitro target residence time and in vivo efficacy. J Med Chem 2014; 57:7016-30. [PMID: 25079952 PMCID: PMC4148150 DOI: 10.1021/jm500694p] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
![]()
Diabetes
is affecting the life of millions of people. A large proportion
of diabetic patients suffer from severe complications such as neuropathic
pain, and current treatments for these complications have deleterious
side effects. Thus, alternate therapeutic strategies are needed. Recently,
the elevation of epoxy-fatty acids through inhibition of soluble epoxide
hydrolase (sEH) was shown to reduce diabetic neuropathic pain in rodents.
In this report, we describe a series of newly synthesized sEH inhibitors
with at least 5-fold higher potency and doubled residence time inside
both the human and rodent sEH enzyme than previously reported inhibitors.
These inhibitors also have better physical properties and optimized
pharmacokinetic profiles. The optimized inhibitor selected from this
new series displayed improved efficacy of almost 10-fold in relieving
pain perception in diabetic neuropathic rats as compared to the approved
drug, gabapentin, and previously published sEH inhibitors. Therefore,
these new sEH inhibitors could be an attractive alternative to treat
diabetic neuropathy in humans.
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Affiliation(s)
- Kin Sing Stephen Lee
- Department of Entomology and Nematology, UCD Comprehensive Cancer Center, University of California Davis , One Shields Avenue, Davis, California 95616, United States
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25
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Inceoglu B, Zolkowska D, Yoo HJ, Wagner KM, Yang J, Hackett E, Hwang SH, Lee KSS, Rogawski MA, Morisseau C, Hammock BD. Epoxy fatty acids and inhibition of the soluble epoxide hydrolase selectively modulate GABA mediated neurotransmission to delay onset of seizures. PLoS One 2013; 8:e80922. [PMID: 24349022 PMCID: PMC3862847 DOI: 10.1371/journal.pone.0080922] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [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: 08/14/2013] [Accepted: 10/18/2013] [Indexed: 11/19/2022] Open
Abstract
In the brain, seizures lead to release of large amounts of polyunsaturated fatty acids including arachidonic acid (ARA). ARA is a substrate for three major enzymatic routes of metabolism by cyclooxygenase, lipoxygenase and cytochrome P450 enzymes. These enzymes convert ARA to potent lipid mediators including prostanoids, leukotrienes and epoxyeicosatrienoic acids (EETs). The prostanoids and leukotrienes are largely pro-inflammatory molecules that sensitize neurons whereas EETs are anti-inflammatory and reduce the excitability of neurons. Recent evidence suggests a GABA-related mode of action potentially mediated by neurosteroids. Here we tested this hypothesis using models of chemically induced seizures. The level of EETs in the brain was modulated by inhibiting the soluble epoxide hydrolase (sEH), the major enzyme that metabolizes EETs to inactive molecules, by genetic deletion of sEH and by direct administration of EETs into the brain. All three approaches delayed onset of seizures instigated by GABA antagonists but not seizures through other mechanisms. Inhibition of neurosteroid synthesis by finasteride partially blocked the anticonvulsant effects of sEH inhibitors while the efficacy of an inactive dose of neurosteroid allopregnanolone was enhanced by sEH inhibition. Consistent with earlier findings, levels of prostanoids in the brain were elevated. In contrast, levels of bioactive EpFAs were decreased following seizures. Overall these results demonstrate that EETs are natural molecules which suppress the tonic component of seizure related excitability through modulating the GABA activity and that exploration of the EET mediated signaling in the brain could yield alternative approaches to treat convulsive disorders.
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Affiliation(s)
- Bora Inceoglu
- Department of Entomology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, California, United States of America
| | - Dorota Zolkowska
- Department of Neurology, School of Medicine, University of California Davis, Sacramento, California, United States of America
| | - Hyun Ju Yoo
- Metabolomics Core Laboratory, Biomedical Research Center, Asan Institute of Life Sciences, Seoul, Korea
| | - Karen M. Wagner
- Department of Entomology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, California, United States of America
| | - Jun Yang
- Department of Entomology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, California, United States of America
| | - Edward Hackett
- Department of Entomology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, California, United States of America
| | - Sung Hee Hwang
- Department of Entomology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, California, United States of America
| | - Kin Sing Stephen Lee
- Department of Entomology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, California, United States of America
| | - Michael A. Rogawski
- Department of Neurology, School of Medicine, University of California Davis, Sacramento, California, United States of America
| | - Christophe Morisseau
- Department of Entomology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, California, United States of America
| | - Bruce D. Hammock
- Department of Entomology and UC Davis Comprehensive Cancer Center, University of California Davis, Sacramento, California, United States of America
- * E-mail:
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Wagner KM, Roeder Z, Desrochers K, Buhler AV, Heinricher MM, Cleary DR. The dorsomedial hypothalamus mediates stress-induced hyperalgesia and is the source of the pronociceptive peptide cholecystokinin in the rostral ventromedial medulla. Neuroscience 2013; 238:29-38. [PMID: 23415792 DOI: 10.1016/j.neuroscience.2013.02.009] [Citation(s) in RCA: 19] [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: 10/29/2012] [Revised: 01/18/2013] [Accepted: 02/05/2013] [Indexed: 12/31/2022]
Abstract
While intense or highly arousing stressors have long been known to suppress pain, relatively mild or chronic stress can enhance pain. The mechanisms underlying stress-induced hyperalgesia (SIH) are only now being defined. The physiological and neuroendocrine effects of mild stress are mediated by the dorsomedial hypothalamus (DMH), which has documented connections with the rostral ventromedial medulla (RVM), a brainstem region capable of facilitating nociception. We hypothesized that stress engages both the DMH and the RVM to produce hyperalgesia. Direct pharmacological activation of the DMH increased sensitivity to mechanical stimulation in awake animals, confirming that the DMH can mediate behavioral hyperalgesia. A behavioral model of mild stress also produced mechanical hyperalgesia, which was blocked by inactivation of either the DMH or the RVM. The neuropeptide cholecystokinin (CCK) acts in the RVM to enhance nociception and is abundant in the DMH. Using a retrograde tracer and immunohistochemical labeling, we determined that CCK-expressing neurons in the DMH are the only significant supraspinal source of CCK in the RVM. However, not all neurons projecting from the DMH to the RVM contained CCK, and microinjection of the CCK2 receptor antagonist YM022 in the RVM did not interfere with SIH, suggesting that transmitters in addition to CCK play a significant role in this connection during acute stress. While the RVM has a well-established role in facilitation of nociception, the DMH, with its well-documented role in stress, may also be engaged in a number of chronic or abnormal pain states. Taken as a whole, these findings establish an anatomical and functional connection between the DMH and RVM by which stress can facilitate pain.
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Affiliation(s)
- K M Wagner
- Department of Neurological Surgery, Oregon Health & Science University, Portland, OR, USA
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Hwang SH, Wagner KM, Morisseau C, Liu JY, Dong H, Wecksler AT, Hammock BD. Synthesis and structure-activity relationship studies of urea-containing pyrazoles as dual inhibitors of cyclooxygenase-2 and soluble epoxide hydrolase. J Med Chem 2011; 54:3037-50. [PMID: 21434686 DOI: 10.1021/jm2001376] [Citation(s) in RCA: 124] [Impact Index Per Article: 9.5] [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
A series of dual inhibitors containing a 1,5-diarylpyrazole and a urea were designed, synthesized, and evaluated as novel COX-2/sEH dual inhibitors in vitro using recombinant enzyme assays and in vivo using a lipopolysaccharide (LPS) induced model of pain in rats. The best inhibition potencies and selectivity for sEH and COX-2 over COX-1 were obtained with compounds (21b, 21i, and 21j) in which both the 1,5-diaryl-pyrazole group and the urea group are linked with a three-methylene group. Compound 21i showed the best pharmacokinetic profiles in both mice and rats (higher AUC and longer half-life). Following subcutaneous administration at 10 mg/kg, compound 21i exhibited antiallodynic activity that is more effective than the same dose of either a COX-2 inhibitor (celecoxib) or a sEH inhibitor (t-AUCB) alone, as well as coadministration of both inhibitors. Thus, these novel dual inhibitors exhibited enhanced in vivo antiallodynic activity in a nociceptive behavioral assay.
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Affiliation(s)
- Sung Hee Hwang
- Department of Entomology, University of California, Davis, California 95616-8584, United States
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Haas MJ, Wagner KM. Substrate Pretreatment can Reduce the Alcohol Requirement During Biodiesel Production Via in Situ Transesterification. J AM OIL CHEM SOC 2011. [DOI: 10.1007/s11746-011-1773-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
Laboratory and field investigations have clearly demonstrated the important role of reduced iron (Fe(II)) in reductive transformations of first-row transition metal species. However, interactions of Fe(II) and copper (Cu) are not clearly understood. This study examined the reduction of Cu(II) by Fe(II) in stirred-batch experiments at pH 5.2 and 5.5 as influenced by chloride (Cl-) concentration (0.002-0.1 M), initial metal concentration (0.1-9.1 mM), and reaction time (1-60 min) under anoxic conditions. Reduction of Cu(II) to Cu(I) by dissolved Fe(II) was rapid under all experimental conditions and the stability of the products explains the driving force for the redox reaction. Under conditions of low [Cl-] and high initial metal concentration, >40% of total Cu and Fe were removed from solution after 1 min, which accompanied formation of a brownish-red precipitate. X-ray diffraction (XRD) patterns of the precipitates revealed the presence of cuprite (Cu2O), a Cu(I) mineral, based on d-spacings located at 0.248, 0.215, 0.151, and 0.129 nm. Fourier transform infrared (FTIR) spectroscopy corroborated XRD data for the presence of Cu2O, with features located at 518, 625, and 698 cm(-1). Increasing [Cl-] stabilized the dissolved Cu(I) product against Cu2O precipitation and resulted in more Fe precipitated from solution (relative to Cu) that appears to be present as poorly crystalline lepidocrocite (gamma-FeOOH). This process may be important in anoxic soil environments, where dissolved Fe(II) levels can accumulate.
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Affiliation(s)
- C J Matocha
- Department of Agronomy, University of Kentucky, N-122 Agricultural Science Center-North, Lexington, KY 40546-0091, USA.
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Torosian MH, Mullen JL, Miller EE, Wagner KM, Stein TP, Buzby GP. Adjuvant, pulse total parenteral nutrition and tumor response to cycle-specific and cycle-nonspecific chemotherapy. Surgery 1983; 94:291-9. [PMID: 6410525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Previous work has demonstrated that substrate-induced alterations of tumor metabolism can be exploited to enhance tumor response to a cycle-specific chemotherapeutic agent (methotrexate). This study was designed to further investigate the biologic mechanism of this phenomenon by determination of tumor response to additional cycle-specific (Adriamycin) and cycle-nonspecific (Cytoxan) chemotherapeutic agents. Significant potentiation of tumor response during adjuvant total parenteral nutrition (TPN) was observed with methotrexate and Adriamycin but not with Cytoxan. This may imply that tumor sensitization by adjuvant TPN occurs by acceleration of the growth rate of proliferating tumor cells and not by recruitment of dormant tumor cells into the cell cycle.
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Abstract
A rare and atypical type of chorangioma is presented. The tumor was unusual in three aspects: (a) clinically, it was delivered after the placenta and required lavage; (b) grossly, the lesion was quite large; and (c) most importantly, it exhibited histologic features suggestive of sarcoma. Immunochemical staining of the tumor for factor VIII antigen demonstrated its endothelial origin. However, the tumor lacked evidence of invasion or biological aggressiveness. We propose that peculiar lesions of this type be termed "atypical cellular chorangiomas." No documented case of chorangiosarcoma could be identified in the literature.
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Abstract
Adenocarcinomas of the ileum and appendix are uncommon. Multiple synchronous adenocarcinomas of the small bowel without carcinoid features are even more unusual, with only seven reported cases in the literature. The radiologic and pathologic findings are reported in a case with 13 separate, well-documented synchronous primary adenocarcinomas of the ileum and appendix. The value of the double-contrast small bowel enema is emphasized.
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