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Ferdousi MI, Calcagno P, Sanchez C, Smith KL, Kelly JP, Roche M, Finn DP. Characterization of pain-, anxiety-, and cognition-related behaviors in the complete Freund's adjuvant model of chronic inflammatory pain in Wistar-Kyoto rats. Front Pain Res (Lausanne) 2023; 4:1131069. [PMID: 37113211 PMCID: PMC10126329 DOI: 10.3389/fpain.2023.1131069] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 03/20/2023] [Indexed: 04/29/2023] Open
Abstract
Introduction Chronic pain is often associated with comorbid anxiety and cognitive dysfunction, negatively affecting therapeutic outcomes. The influence of genetic background on such interactions is poorly understood. The stress-hyperresponsive Wistar-Kyoto (WKY) rat strain, which models aspects of anxiety and depression, displays enhanced sensitivity to noxious stimuli and impaired cognitive function, compared with Sprague-Dawley (SD) counterparts. However, pain- and anxiety-related behaviors and cognitive impairment following induction of a persistent inflammatory state have not been investigated simultaneously in the WKY rats. Here we compared the effects of complete Freund's adjuvant (CFA)-induced persistent inflammation on pain-, negative affect- and cognition-related behaviors in WKY vs. SD rats. Methods Male WKY and SD rats received intra-plantar injection of CFA or needle insertion (control) and, over the subsequent 4 weeks, underwent behavioral tests to assess mechanical and heat hypersensitivity, the aversive component of pain, and anxiety- and cognition-related behaviors. Results The CFA-injected WKY rats exhibited greater mechanical but similar heat hypersensitivity compared to SD counterparts. Neither strain displayed CFA-induced pain avoidance or anxiety-related behavior. No CFA-induced impairment was observed in social interaction or spatial memory in WKY or SD rats in the three-chamber sociability and T-maze tests, respectively, although strain differences were apparent. Reduced novel object exploration time was observed in CFA-injected SD, but not WKY, rats. However, CFA injection did not affect object recognition memory in either strain. Conclusions These data indicate exacerbated baseline and CFA-induced mechanical hypersensitivity, and impairments in novel object exploration, and social and spatial memory in WKY vs. SD rats.
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Affiliation(s)
- Mehnaz I. Ferdousi
- Pharmacology and Therapeutics, School of Medicine, University of Galway, Galway, Ireland
- Centre for Pain Research, University of Galway, Galway, Ireland
- Galway Neuroscience Centre, University of Galway, Galway, Ireland
| | - Patricia Calcagno
- Pharmacology and Therapeutics, School of Medicine, University of Galway, Galway, Ireland
- Centre for Pain Research, University of Galway, Galway, Ireland
- Galway Neuroscience Centre, University of Galway, Galway, Ireland
- Physiology, School of Medicine, University of Galway, Galway, Ireland
| | | | | | - John P. Kelly
- Pharmacology and Therapeutics, School of Medicine, University of Galway, Galway, Ireland
- Centre for Pain Research, University of Galway, Galway, Ireland
- Galway Neuroscience Centre, University of Galway, Galway, Ireland
| | - Michelle Roche
- Centre for Pain Research, University of Galway, Galway, Ireland
- Galway Neuroscience Centre, University of Galway, Galway, Ireland
- Physiology, School of Medicine, University of Galway, Galway, Ireland
| | - David P. Finn
- Pharmacology and Therapeutics, School of Medicine, University of Galway, Galway, Ireland
- Centre for Pain Research, University of Galway, Galway, Ireland
- Galway Neuroscience Centre, University of Galway, Galway, Ireland
- Correspondence: David P. Finn
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Mirchandani Y, Patravale VB, Brijesh S. Hyaluronic acid-coated solid lipid nanoparticles enhance antirheumatic activity and reduce toxicity of methotrexate. Nanomedicine (Lond) 2022; 17:1099-1114. [PMID: 36178114 DOI: 10.2217/nnm-2022-0009] [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: 11/21/2022] Open
Abstract
Aim: Methotrexate (MTX) is used to treat rheumatoid arthritis (RA) but is associated with severe toxicity. To minimize these side effects of MTX, the study was undertaken to explore its delivery using solid lipid nanoparticles (SLNs). Materials & methods: MTX-loaded SLNs were synthesized and coated with hyaluronic acid (HA) for targeted drug delivery and evaluated for their safety and efficacy in a complete Freund's adjuvant (CFA) model. Results: HA-MTX-SLNs (230.0 ± 46.4 nm) with 78.75% entrapment were developed and showed sustained drug release with a significant reduction in toxicity and enhanced activity of the drug at the targeted site upon oral administration in CFA-induced rats. Conclusion: HA-MTX-SLNs can be considered as an efficient therapeutic agents for the treatment of RA.
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Affiliation(s)
- Yashika Mirchandani
- Department of Biological Sciences, Sunandan Divatia School of Science, NMIMS (Deemed-to-be) University, 7th Floor, Mithibai College Building, Vile Parle (W), Mumbai, 400056, India
| | - Vandana B Patravale
- Pharmaceutical Science & Technology, Institute of Chemical Technology, Matunga, Mumbai, 400019, India
| | - S Brijesh
- Department of Biological Sciences, Sunandan Divatia School of Science, NMIMS (Deemed-to-be) University, 7th Floor, Mithibai College Building, Vile Parle (W), Mumbai, 400056, India
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Guo X, Xue Y, Ji W, Liang J, Qingshi Z. Effects of administration of α2 adrenergic receptor agonist into psoas major muscle on inflammatory pain induced by injection of complete Freund's adjuvant in rats. Mol Pain 2022; 18:17448069221107810. [PMID: 35658695 PMCID: PMC9358342 DOI: 10.1177/17448069221107810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
α2 adrenergic agonists are widely used in clinical anesthesia and ICU
sedation owing to their effective sedative and analgesic effects. Lumbago and
leg pain is the most common clinical pain disease. Studies have reported that
lumbago and leg pain is associated with dysregulation of paravertebral muscles,
especially psoas major muscles. In the present study, a unilateral lower
extremity chronic inflammation and pain model was established by subcutaneous
administration of low-dose complete Fredrin’s adjuvant (CFA) into the posterior
paw of rats. α2 adrenalin receptor agonist was then injected into the
psoas major muscle. Behavioral tests were conducted for 21 days. Psoas major
muscle tissue was harvested for evaluation of biochemical indexes related to
pain. The effect of α2 adrenergic receptor agonist injected into
psoas major muscle on chronic inflammatory pain of lower extremities in rats was
explored. The results showed that injection of α2 adrenergic receptor
agonist into the psoas major muscle relieved CFA-induced mechanical
hyperalgesia. Administration of α2 adrenergic receptor antagonist
yohimbine reversed the analgesic effect of α2 adrenergic receptor
agonists. Administration of dexmedetomidine into psoas major muscle
downregulated the levels of norepinephrine, interleukin-6 and tumor necrosis
factor-α in tissues. The findings of the present study show that administration
of α2 adrenoceptor agonists into the psoas major muscle relieves
chronic inflammatory pain induced by CFA. Local injection of dexmedetomidine
also exerted anti-inflammatory and anti-sympathetic effect by activating
α2-adrenoceptor in the psoas major muscle.
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Affiliation(s)
- Xingxing Guo
- Division of Anesthesiology,
Department of Cardiovascular Surgery, Guangdong Institute of
Cardiovascular, Guangdong Provincial People’s Hospital, Guangdong Academy
of Medical Sciences, Guangzhou, China
- Department of Anesthesiology, Guangdong Provincial People’s
Hospital, (Zhuhai Golden Bay Center Hospital), Zhuhai, China
| | - Yan Xue
- Division of Anesthesiology,
Department of Cardiovascular Surgery, Guangdong Institute of
Cardiovascular, Guangdong Provincial People’s Hospital, Guangdong Academy
of Medical Sciences, Guangzhou, China
- Department of Anesthesiology, Guangdong Provincial People’s
Hospital, Guangdong Academy of Medical Sciences, Guangzhou,
China
| | - Wenjin Ji
- Department of Anesthesiology, Guangdong Provincial People’s
Hospital, Guangdong Academy of Medical Sciences, Guangzhou,
China
| | - Jiexian Liang
- Division of Anesthesiology,
Department of Cardiovascular Surgery, Guangdong Institute of
Cardiovascular, Guangdong Provincial People’s Hospital, Guangdong Academy
of Medical Sciences, Guangzhou, China
- Department of Anesthesiology, Guangdong Provincial People’s
Hospital, (Zhuhai Golden Bay Center Hospital), Zhuhai, China
- Jiexian Liang, Division of Anesthesiology,
Department of Cardiovascular Surgery, Guangdong Institute of Cardiovascular,
Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences,
96 DongChun Road, Guangzhou, Guangdong 510080, China.
| | - Zeng Qingshi
- Department of Anesthesiology, Guangdong Provincial People’s
Hospital, (Zhuhai Golden Bay Center Hospital), Zhuhai, China
- Qingshi Zeng, Department of Anesthesiology,
Guangdong Provincial People’s Hospital Zhuhai Hospital (Zhuhai Golden Bay Center
Hospital), Zhuhai 519040, China.
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Xu C, Wu XL, Cheng K, Li N. [Preparation of a rat model of chronic pelvic pain syndrome with inflammation-induced chronic pain induced by com-plete Freund's adjuvant]. Zhongguo Ying Yong Sheng Li Xue Za Zhi 2022; 38:6-10. [PMID: 35634662 DOI: 10.12047/j.cjap.6199.2022.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
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Sun S, Du Y, Li S, Gao B, Xia R, Cao W, Zhang C, Zhu E. Anti-inflammatory activity of different isolated sites of Chloranthus serratus in complete Freund's adjuvant-induced arthritic rats. Exp Ther Med 2021; 22:848. [PMID: 34149894 PMCID: PMC8210295 DOI: 10.3892/etm.2021.10280] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 04/26/2020] [Accepted: 05/05/2021] [Indexed: 12/15/2022] Open
Abstract
Chloranthus serratus is a traditional Chinese medicine for treating arthritis and bruises. The aim of the present study was to investigate the anti-arthritic activities and possible associated mechanisms of different isolated sites of Chloranthus serratus (DISC) in adjuvant-induced arthritis (AA) rats. The therapeutic effects of the extracts were assessed through changes in body weights, swelling rates, arthritis indexes (AI) and organ indexes. The levels of nitric oxide (NO), malondialdehyde and superoxide dismutase were determined using one-step method, TBA method and hydroxylamine method, respectively; the levels of TNF-α, IL-1β, IL-6, prostaglandin E2, macrophage inhibitor factor-1, VEGF, immunoglobulin (Ig) G, IgM and IFN-γ in serum were determined using ELISA. Pathological changes and positive expression of VEGF in the ankle joints were investigated using hematoxylin-eosin staining and immunohistochemical staining, respectively. DISC treatment increased the weight gains and thymus indexes, and decreased the swelling rates, spleen indexes and AI in AA rats. The water isolated site (WA) and ethyl acetate isolated site (EA) significantly reversed complete Freund's adjuvant (CFA)-induced changes in the levels of NO, IL-6, TNF-α, IgG and IFN-γ, while the n-butanol isolated site (NB) only reversed the changes in IL-6 and IgG contents. Some changes in the chloroform isolated site group showed the same trend as those in the model group. The extracts relieved synovial hyperplasia, inflammatory cell infiltration and articular surface defects, and reduced the positive expression rate of VEGF in the synovial tissues of the AA rats to varying degrees. The WA exhibited the most marked effects, followed by the EA and NB, indicating that WA had optimal therapeutic effects on CFA-induced arthritic rats, which may be mediated by the oxidative stress and inhibition of inflammatory factors. C. serratus may serve as a potential candidate for the treatment of rheumatoid arthritis.
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Affiliation(s)
- Shuping Sun
- Pharmacy Teaching and Research Department, College of Pharmacy, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
- Institute of Natural Daily Chemistry, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Yunyan Du
- Pharmacy Teaching and Research Department, College of Pharmacy, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Shengli Li
- The Third Orthopedics Department, The Fifth People's Hospital of Wuhu, Wuhu, Anhui 241000, P.R. China
| | - Bianbian Gao
- Pharmacy Teaching and Research Department, College of Pharmacy, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Rongping Xia
- Pharmacy Teaching and Research Department, College of Pharmacy, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Wenjing Cao
- Pharmacy Teaching and Research Department, College of Pharmacy, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Chao Zhang
- Pharmacy Teaching and Research Department, College of Pharmacy, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Enze Zhu
- Pharmacy Teaching and Research Department, College of Pharmacy, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
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McCarson KE, Fehrenbacher JC. Models of Inflammation: Carrageenan- or Complete Freund's Adjuvant (CFA)-Induced Edema and Hypersensitivity in the Rat. Curr Protoc 2021; 1:e202. [PMID: 34314105 DOI: 10.1002/cpz1.202] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Animal models of inflammation are used to assess the production of inflammatory mediators at sites of inflammation, the processing of pain sensation at CNS sites, the anti-inflammatory properties of agents such as nonsteroidal anti-inflammatory drugs (NSAIDs), and the efficacy of putative analgesic compounds in reversing cutaneous hypersensitivity. Detailed in this article are methods to elicit and measure carrageenan- and complete Freund's adjuvant (CFA)-induced cutaneous inflammation. Due to possible differences between the dorsal root sensory system and the trigeminal sensory system, injections into either the footpad or vibrissal pad are described. In this manner, cutaneous inflammation can be assessed in tissue innervated by the lumbar dorsal root ganglion neurons (footpad) or by the trigeminal ganglion neurons (vibrissal pad). © 2021 Wiley Periodicals LLC.
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Affiliation(s)
- Kenneth E McCarson
- Kansas Intellectual and Developmental Disabilities Research Center (KIDDRC), Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, Kansas
| | - Jill C Fehrenbacher
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana
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Yu J, Du J, Fang J, Liu Y, Xiang X, Liang Y, Shao X, Fang J. The interaction between P2X3 and TRPV1 in the dorsal root ganglia of adult rats with different pathological pains. Mol Pain 2021; 17:17448069211011315. [PMID: 33906494 PMCID: PMC8108079 DOI: 10.1177/17448069211011315] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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] [Indexed: 12/20/2022] Open
Abstract
Peripheral inflammatory and neuropathic pain are closely related to the activation of purinergic receptor P2X ligand-gated ion channel 3 (P2X3) and transient receptor potential vanilloid 1 (TRPV1), but the interaction between P2X3 and TRPV1 in different types of pathological pain has rarely been reported. In this study, complete Freund’s adjuvant (CFA)-induced inflammatory pain and spared nerve injury (SNI)-induced neuropathic pain models were established in adult rats. The interactions between P2X3 and TRPV1 in the dorsal root ganglion were observed by pharmacological, co-immunoprecipitation, immunofluorescence and whole-cell patch-clamp recording assays. TRPV1 was shown to promote the induction of spontaneous pain caused by P2X3 in the SNI model, but the induction of spontaneous pain behaviour by TRPV1 was not completely dependent on P2X3 in vivo. In both the CFA and SNI models, the activation of peripheral P2X3 enhanced the effect of TRPV1 on spontaneous pain, while the inhibition of peripheral TRPV1 reduced the induction of spontaneous pain by P2X3 in the CFA model. TRPV1 and P2X3 had inhibitory effects on each other in the inflammatory pain model. During neuropathic pain, P2X3 facilitated the function of TRPV1, while TRPV1 had an inhibitory effect on P2X3. These results suggest that the mutual effects of P2X3 and TRPV1 differ in cases of inflammatory and neuropathic pain in rats.
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Affiliation(s)
- Jie Yu
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China.,Department of Acupuncture and Massage, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Junying Du
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Junfan Fang
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yingjun Liu
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xuaner Xiang
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yi Liang
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xiaomei Shao
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jianqiao Fang
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
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Akhtar MF, Raza SA, Saleem A, Hamid I, Ashraf Baig MMF, Sharif A, Sohail K, Javaid Z, Saleem U, Rasul A. Appraisal of Anti-Arthritic and Anti-Inflammatory Potential of Folkloric Medicinal Plant Peganum Harmala. Endocr Metab Immune Disord Drug Targets 2021; 22:49-63. [PMID: 33563161 DOI: 10.2174/1871530321666210208211310] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/06/2020] [Accepted: 11/19/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Peganum harmala is traditionally used to manage rheumatoid arthritis (RA) and other inflammatory conditions. However, its use against RA has not been scientifically evaluated. The current study was designed to assess the anti-arthritic and anti-inflammatory activities of the methanolic extract of P. harmala leaves by in vitro and in vivo methods. METHODS The in vitro assays were carried out to determine the effect of plant extract on inhibition of egg albumin denaturation and human red blood cell membrane (HRBC) stabilization. Moreover, 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity was performed to determine the antioxidant potential. In vivo anti-arthritic activity was performed by determining the curative effect against Complete Freund's adjuvant (0.1 ml). The plant extract was administered to rats orally at 200, 400 and 600 mg/kg/day for 21 days. RESULTS The values of IC50 of plant extract in protein denaturation, stabilization of HRBC and DPPH assays were 77.54 mg/ml, 23.90 mg/ml and 58.09 µg/ml respectively. Moreover, the plant extract significantly attenuated the poly-arthritis and weight loss, anemia and paw edema. The plant extract restored the level of C-reactive protein, rheumatoid factor, alanine transaminase, aspartate transaminase and alkaline phosphatase in poly-arthritic rats. Moreover, the plant extract restored the immune organs weight in treated rats. Treatment with P. harmala also significantly subdued the oxidative stress by reinstating superoxide dismutase, reduced glutathione, catalase and malondialdehyde in poly-arthritic rats. The plant extract notably restored the prostaglandin-E2 and tumor necrosis factor (TNF)-α in the serum of poly-arthritic rats. CONCLUSION It was concluded that P. harmala extract had potential antioxidant, anti-inflammatory and antiarthritic activities which primarily might be attributed to alkaloids, flavonoids and phenols.
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Affiliation(s)
- Muhammad Furqan Akhtar
- Riphah Institute of Pharmaceutical Sciences, Riphah International University, Lahore Campus, Lahore, . Pakistan
| | - Syed Ahmad Raza
- Riphah Institute of Pharmaceutical Sciences, Riphah International University, Lahore Campus, Lahore, . Pakistan
| | - Ammara Saleem
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad, . Pakistan
| | - Irfan Hamid
- Cadson College of Pharmacy, University of the Punjab, Kharian, . Pakistan
| | | | - Ali Sharif
- Institute of Pharmacy, Faculty of Pharmaceutical and Allied Health Sciences, Lahore, College for Women University, Jail Road, Lahore. Pakistan
| | - Kashif Sohail
- Akson College of Health Sciences, Mirpur University of Science and technology, Mirpur, AJK, . Pakistan
| | - Zeeshan Javaid
- Akson College of Health Sciences, Mirpur University of Science and technology, Mirpur, AJK, . Pakistan
| | - Uzma Saleem
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad, . Pakistan
| | - Azhar Rasul
- Department of Zoology, Government College University Faisalabad, Faisalabad, . Pakistan
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Lu Y, Yin Y, Gong L. Meibomian gland dysfunction model induced with complete Freund's adjuvant in C57BL/6 mice. Int J Ophthalmol 2020; 13:1705-1712. [PMID: 33214999 DOI: 10.18240/ijo.2020.11.04] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 08/04/2020] [Indexed: 11/23/2022] Open
Abstract
AIM To establish a new inflammatory animal model of meibomian gland dysfunction (MGD) in C57BL/6 mice. METHODS C57BL/6 mice were randomly divided into complete Freund's adjuvant (CFA) group (14 animals, 14 eyes), naphthazolin hydrochloride (NH) group (14 animals, 14 eyes) and control group (14 animals, 14 eyes). In CFA group, CFA was used in eyelid conjunctiva injection; in NH group, NH eye drops were used twice a day; control group was injected with equal dose of saline at the same time point and same site with animals in CFA group. The meibomian gland orifices score (MGOS) was evaluated on a scale of 0 to 3 in the middle five meibomian gland orifices of the upper and lower eyelid using slit lamp. After the successful induction of each animal model, intense pulsed light (IPL) was introduced on each mouse in CFA and NH group. Oil red O (ORO), hematoxylin and eosin (H&E) staining were performed before and after successful induction of CFA, NH and control group. RESULTS At 12wk after CFA injection, inflammatory cell infiltration and fiber necrosis was observed, with acinar density and duct dilatation significantly lower compared with control group. In NH group, the meibomian gland acini were relatively smaller and deformed compared with control group, the number of meibomian gland acini was also slightly lower. No inflammatory cell or fiber necrosis was observed in NH group. After three times of IPL treatment (5/10 mice in each group, and the other 5 mice served as non-IPL control), MGOS was significantly lower in IPL-treated mice in NH group (P<0.01). After three times of IPL treatment, the MGOS of NH group was significantly lower than that in the CFA group (P<0.01). CONCLUSION We develop a novel animal model that studies the role of inflammation in the development of MGD and IPL treatment. This model indicates that persistent inflammatory state may be the cause of MGD and weaken the therapeutic effect of IPL.
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Affiliation(s)
- Yang Lu
- Department of Ophthalmology and Vision Science, Eye&ENT Hospital of Fudan University, Shanghai 200031, China
| | - Yue Yin
- Department of Ophthalmology and Vision Science, Eye&ENT Hospital of Fudan University, Shanghai 200031, China
| | - Lan Gong
- Department of Ophthalmology and Vision Science, Eye&ENT Hospital of Fudan University, Shanghai 200031, China
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Huang Y, Guo L, Chitti R, Sreeharsha N, Mishra A, Gubbiyappa SK, Singh Y. Wogonin ameliorate complete Freund's adjuvant induced rheumatoid arthritis via targeting NF-κB/MAPK signaling pathway. Biofactors 2020; 46:283-291. [PMID: 31721330 DOI: 10.1002/biof.1585] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 10/15/2019] [Indexed: 12/14/2022]
Abstract
Rheumatoid arthritis (RA) is a chronic and accelerated autoimmune illness with proliferative and damaging synovitis, resulting in joint death and cartilage and bone erosion. This study focused on the potential therapeutic effect of wogonin on complete Freund's adjuvant (CFA) induced RA in rats and the underlying mechanisms. Arthritis was experimentally caused in rats by subcutaneously injecting 0.1 mL of CFA into the subplantar area of the left hind paw under moderate anesthesia on day zero. The regular oral doses of indomethacin/wogonin began on day zero and proceeded after injection to day 35. Wogonin reduced arthritic score considerably, enhanced body weight, and reduced paw thickness. Wogonin also boosted red blood cell considerably along with hemoglobin and reduced white blood cell count and erythrocyte sedimentation rate. Wogonin substantially improved an altered level of oxidative stress markers, antioxidant proteins, and inflammatory cytokines in a dose-dependent way. Wogonin inhibited p38 phosphorylation triggered by CFA and p65 nuclear translocation.
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Affiliation(s)
- Yuntai Huang
- Department of Rheumatology, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, Henan Province, China
| | - Lubo Guo
- Department of Pharmacy, Jinan Central Hospital, Jinan, Shandong Province, China
| | - Renukaradhya Chitti
- Department of Pharmacy Practice, Sri Adichunchanagiri College of Pharmacy, Mandya, Karnataka, India
| | - Nagaraja Sreeharsha
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Anurag Mishra
- School of Pharmacy, Suresh Gyan Vihar University, Jaipur, Rajasthan, India
| | | | - Yogendra Singh
- Department of Pharmaceutical Sciences, Mahatma Gandhi College of Pharmaceutical Sciences, Sitapura, Jaipur, India
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Huot-Lavoie M, Ting WKC, Demers M, Mercier C, Ethier C. Impaired Motor Learning Following a Pain Episode in Intact Rats. Front Neurol 2019; 10:927. [PMID: 31507526 PMCID: PMC6718695 DOI: 10.3389/fneur.2019.00927] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 06/18/2019] [Accepted: 08/09/2019] [Indexed: 01/22/2023] Open
Abstract
Motor learning and pain are important factors influencing rehabilitation. Despite being mostly studied independently from each other, important interactions exist between them in the context of spinal cord injury, whether to the spinal cord or the body. Ongoing or recent past episodes of nociceptive activity can prevent motor learning in spinalized rats. In intact animals, it has been proposed that supraspinal activity could counter the repressive effect of nociception on motor system plasticity, but this has not yet been verified in behavioral conditions. The aim of this study was to test whether a recent episode of nociception affects subsequent motor learning in intact animals. We trained rodents to walk on a custom-made horizontal ladder. After initial training, the rats underwent a week-long rest, during which they were randomly assigned to a control group, or one out of two pain conditions. Nociceptive stimuli of different durations were induced through capsaicin or Complete Freund's Adjuvant injections and timed so that the mechanical hypersensitivity had entirely subsided by the end of the resting period. Training then resumed on a modified version of the horizontal ladder. We evaluated the animals' ability to adapt to the modified task by measuring their transit time and paw misplacements over 4 days. Our results show that prior pain episodes do affect motor learning in neurologically intact rats. Motor learning deficits also seem to be influenced by the duration of the pain episode. Rats receiving a subcutaneous injection of capsaicin displayed immediate signs of mechanical hypersensitivity, which subsided rapidly. Nonetheless, they still showed learning deficits 24 h after injection. Rats who received a Complete Freund's Adjuvant injection displayed mechanical hypersensitivity for up to 7 days during the resting period. When trained on the modified ladder task upon returning to normal sensitivity levels, these rats exhibited more prolonged motor learning deficits, extending over 3 days. Our results suggest that prior pain episodes can negatively influence motor learning, and that the duration of the impairment relates to the duration of the pain episode. Our results highlight the importance of addressing pain together with motor training after injury.
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Affiliation(s)
- Maxime Huot-Lavoie
- CERVO Research Center, Psychiatry and Neurosciences Department, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Windsor Kwan-Chun Ting
- CERVO Research Center, Psychiatry and Neurosciences Department, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Maxime Demers
- CERVO Research Center, Psychiatry and Neurosciences Department, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Catherine Mercier
- Centre for Interdisciplinary Research in Rehabilitation and Social Integration, Department of Rehabilitation, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Christian Ethier
- CERVO Research Center, Psychiatry and Neurosciences Department, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
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Petrović J, Silva JR, Bannerman CA, Segal JP, Marshall AS, Haird CM, Gilron I, Ghasemlou N. γδ T Cells Modulate Myeloid Cell Recruitment but Not Pain During Peripheral Inflammation. Front Immunol 2019; 10:473. [PMID: 30936874 PMCID: PMC6431614 DOI: 10.3389/fimmu.2019.00473] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 02/21/2019] [Indexed: 12/12/2022] Open
Abstract
Circulating immune cells, which are recruited to the site of injury/disease, secrete various inflammatory mediators that are critical to nociception and pain. The role of tissue-resident immune cells, however, remains poorly characterized. One of the first cells to be activated in peripheral tissues following injury are γδT cells, which serve important roles in infection, disease, and wound healing. Using a mouse line lacking these cells, we sought to identify their contribution to inflammatory pain. Three distinct models of peripheral inflammatory pain were used: intraplantar injection of formalin (spontaneous inflammatory pain), incisional wound (acute inflammatory pain), and intraplantar injection of complete Freund's adjuvant (chronic inflammatory pain). Our results show that absence of γδT cells does not alter baseline sensitivity, nor does it result in changes to mechanical or thermal hypersensitivity after tissue injury. Myeloid cell recruitment did show differential changes between models of acute and chronic inflammatory pain. These results were consistent in both male and female mice, suggesting that there are no sex differences in these outcomes. This comprehensive characterization suggests that γδT cells do not contribute to basal sensitivity or the development and maintenance of inflammatory pain.
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Affiliation(s)
- Jelena Petrović
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Jaqueline Raymondi Silva
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
- Department of Anesthesiology & Perioperative Medicine, Queen's University, Kingston, ON, Canada
| | - Courtney A. Bannerman
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Julia P. Segal
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Abigail S. Marshall
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Cortney M. Haird
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Ian Gilron
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
- Department of Anesthesiology & Perioperative Medicine, Queen's University, Kingston, ON, Canada
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada
| | - Nader Ghasemlou
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
- Department of Anesthesiology & Perioperative Medicine, Queen's University, Kingston, ON, Canada
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada
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13
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Kumar R, Singh S, Saksena AK, Pal R, Jaiswal R, Kumar R. Effect of Boswellia Serrata Extract on Acute Inflammatory Parameters and Tumor Necrosis Factor-α in Complete Freund's Adjuvant-Induced Animal Model of Rheumatoid Arthritis. Int J Appl Basic Med Res 2019; 9:100-106. [PMID: 31041173 PMCID: PMC6477955 DOI: 10.4103/ijabmr.ijabmr_248_18] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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] [Indexed: 12/17/2022] Open
Abstract
Context The worldwide prevalence of rheumatoid arthritis (RA) is about 1%, whereas in India, it is approximately 0.75%. The current therapy for RA includes nonsteroidal anti-inflammatory drugs corticosteroids, disease-modifying anti-rheumatic drugs and some recently developed biologic agents, but all of these are associated with adverse effects. Some herbal drugs, such as Boswellia serrata, have been reported to possess anti-inflammatory activity. Aims The aim of this study is to evaluate the anti-arthritic activity of Boswellia serrata extract (BSE) in complete Freund's adjuvant (CFA)-induced arthritis in rats. Materials and Methods Thirty-six Wistar rats were divided into six equal groups. RA was induced by intradermal injection of 0.1 ml CFA in hind paw. Body weight, ankle diameter, paw volume, arthritic index, tumor necrosis factor-α (TNF-α), and histopathological examination were assessed. The experimental data were statistically assessed by one-way analysis of variance (ANOVA). Statistical Analysis Used The recorded data were analyzed using paired t-test and ANOVA test using SPSS. The data were analyzed and represented as mean difference. Value of P < 0.05 was considered statistically significant. Results BSE at dose 180 mg/kg showed statistically significant improvement in body weight and decrease in ankle diameter and arthritic index (P < 0.05); however, there was insignificant change in paw volume (P = 0.056). This improvement was comparable with Indomethacin. The level of TNF-α did not show any statistically significant change (P = 0.076). Histopathological results also exhibited a reduction in inflammatory parameters. Conclusions BSE might have usefulness as an adjunct to conventional therapy of RA.
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Affiliation(s)
- Rajendra Kumar
- Department of Pharmacology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Sarvesh Singh
- Department of Pharmacology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Anil Kumar Saksena
- Department of Pharmacology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Rishi Pal
- Department of Pharmacology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Riddhi Jaiswal
- Department of Pathology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Rahul Kumar
- Department of Pharmacology, King George's Medical University, Lucknow, Uttar Pradesh, India
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Li X, Wu Z, He B, Zhong W. Tetrandrine alleviates symptoms of rheumatoid arthritis in rats by regulating the expression of cyclooxygenase-2 and inflammatory factors. Exp Ther Med 2018; 16:2670-2676. [PMID: 30186500 DOI: 10.3892/etm.2018.6498] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 03/17/2017] [Indexed: 01/01/2023] Open
Abstract
The present study aimed to construct a rat model of rheumatoid arthritis (RA) to evaluate changes in pathology, the expression of inflammatory factors and regulation of signaling pathways. The protective effect of tetrandrine (Tet) on tissue lesions induced by RA was also investigated. A total of 60 Wistar rats (100-200 g) were randomly divided into six groups (n=10 per group), namely a blank (NC) group, model group, methotrexate (MTX) group (3 mg/kg body weight), high-dose Tet group (31.25 mg/kg body weight), medium-dose Tet group (18.75 mg/kg body weight) and low-dose Tet group (6.25 mg/kg body weight). A rat model of RA was induced via injection of 0.1 ml complete Freund's adjuvant into the right rear toe. Toe swelling rate, arthritis index and immune organ index were calculated. In addition, cyclooxygenase (COX)-2 expression at the mRNA and protein level in the peripheral blood mononuclear cells (PBMCs) of rats were determined by reverse transcription-quantitative polymerase chain reaction and western blot analysis, respectively. Serum concentrations of inflammatory factors were measured using enzyme-linked immunosorbent assays. It was observed that treatment with Tet alleviated the severity of rear toe swelling associated with RA in rats. Furthermore, Tet exerted anti-inflammatory and immunosuppressive effects in the rat model of RA. Tet also reduced the expression of COX-2 in PBMCs and lowered the concentrations of inflammatory factors in the serum of RA rats. The present data indicate that Tet may exert pharmacological effects in the treatment of RA. The mechanism of action of Tet may be associated with the regulation of inflammatory factors and the inhibition of immune organs.
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Affiliation(s)
- Xiang Li
- Department of Pharmacy, Zaozhuang Municipal Hospital, Zaozhuang, Shandong 277101, P.R. China
| | - Zhongxiu Wu
- Department of Pharmacy, Zaozhuang Municipal Hospital, Zaozhuang, Shandong 277101, P.R. China
| | - Bin He
- Department of Pharmacy, Zaozhuang Municipal Hospital, Zaozhuang, Shandong 277101, P.R. China
| | - Wei Zhong
- Cadre Ward, Zaozhuang Municipal Hospital, Zaozhuang, Shandong 277101, P.R. China
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15
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Ye Z, Zhang M, Ding N, Gao P, Hei Y, Wang Y, Gao W, Ye Q. Antinociceptive effects of dezocine on complete Freund's adjuvant-induced inflammatory pain in rats. Exp Ther Med 2018; 15:5469-5474. [PMID: 29904426 DOI: 10.3892/etm.2018.6110] [Citation(s) in RCA: 3] [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: 06/18/2017] [Accepted: 11/29/2017] [Indexed: 11/05/2022] Open
Abstract
Inflammatory pain is known to severely impact the life quality of patients. Notably, dezocine is widely used for the treatment of pain. Therefore, the current study aimed to examine the effects of dezocine on a complete Freund's adjuvant (CFA)-induced inflammatory pain model in rats and to investigate the possible underlying molecular mechanisms. Rats were randomly divided into three groups, including the control, CFA and dezocine+CFA groups, and then subcutaneously injected with 100 µl saline, subcutaneously injected with 100 µl CFA or pretreated with 1 ml dezocine (0.4 µg/kg) at 30 min before CFA injection in the plantar surface of right hind paw, respectively. The paw withdrawal threshold (PWT) and paw withdrawal latency (PWL) were measured with a dynamic plantar esthesiometer at 1 day before and 6 h after CFA injection. The ipsilateral lumbar spinal cords of all the rats were harvested for detecting the expression profiles of phosphorylated (p)-p65, p-extracellular signal-regulated kinase 1/2 (p-ERK1/2), cyclooxygenase-2 (COX-2), interleukin (IL)-1β and tumor necrosis factor (TNF)-α by western blot analysis and/or reverse transcription-quantitative polymerase chain reaction. In addition, prostaglandin E2 (PGE2) expression was determined by enzyme-linked immunosorbent assay. Compared with the control group, CFA-induced peripheral inflammation downregulated the PWT and PWL values of rats, which were significantly alleviated by dezocine treatment. Furthermore, the protein levels of p-p65, p-ERK1/2, COX-2, PGE2, IL-1β and TNF-α were significantly upregulated following CFA injection, while they were suppressed by dezocine pretreatment. In conclusion, the analgesic effect of dezocine on inflammatory pain induced by CFA may be associated with the inhibition of the spinal ERK1/2-COX-2 pathway.
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Affiliation(s)
- Zhenhai Ye
- Department of Anesthesiology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.,Department of Anesthesiology, First Affiliated Hospital of Northwest University for Nationalities, Yinchuan, Ningxia 750002, P.R. China
| | - Maoxian Zhang
- Department of Anesthesiology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.,Department of Anesthesiology, First Affiliated Hospital of Northwest University for Nationalities, Yinchuan, Ningxia 750002, P.R. China
| | - Ning Ding
- Department of Anesthesiology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.,Department of Anesthesiology, First Affiliated Hospital of Northwest University for Nationalities, Yinchuan, Ningxia 750002, P.R. China
| | - Peng Gao
- Department of Anesthesiology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.,Department of Anesthesiology, First Affiliated Hospital of Northwest University for Nationalities, Yinchuan, Ningxia 750002, P.R. China
| | - Yunpeng Hei
- Department of Anesthesiology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.,Department of Anesthesiology, First Affiliated Hospital of Northwest University for Nationalities, Yinchuan, Ningxia 750002, P.R. China
| | - Yun Wang
- Department of Anesthesiology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.,Department of Anesthesiology, First Affiliated Hospital of Northwest University for Nationalities, Yinchuan, Ningxia 750002, P.R. China
| | - Wei Gao
- Department of Anesthesiology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.,Department of Anesthesiology, First Affiliated Hospital of Northwest University for Nationalities, Yinchuan, Ningxia 750002, P.R. China
| | - Qingshan Ye
- Department of Anesthesiology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.,Department of Anesthesiology, First Affiliated Hospital of Northwest University for Nationalities, Yinchuan, Ningxia 750002, P.R. China
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16
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Navarro-Alvarez N, Goncalves B, Andrews AR, Wang Z, Wang Z, Harrington E, Shah J, Sachs DH, Eliaz I, Huang CA. The effects of galectin-3 depletion apheresis on induced skin inflammation in a porcine model. J Clin Apher 2018; 33:486-493. [PMID: 29572917 DOI: 10.1002/jca.21624] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 02/26/2018] [Accepted: 03/01/2018] [Indexed: 12/20/2022]
Abstract
Galectin-3 (Gal-3), a β-galactoside-binding lectin that is expressed in mammalian cells, is known to modulate several biological functions such as cell-cell adhesion, macrophage activation, angiogenesis, metastasis, and fibrosis. The goal of this study was to evaluate the ability of Gal-3 depletion apheresis using an adsorption column with immobilized anti-Gal-3-antibody to reduce inflammation induced by Complete Freund's Adjuvant injection in a skin inflammation porcine model. Here, we report that plasma perfusion by apheresis through a Gal-3 binding immuno-affinity column reduces plasma Gal-3 levels to below limits of quantitative detection, and results in significant decrease in skin inflammation, including degree and duration of inflammatory lesions. Human plasma was tested ex vivo and found to be efficiently depleted using the anti-Gal-3 affinity column. This study demonstrates the potential of Gal-3 depletion apheresis as a therapeutic method for inflammation-mediated disease, supporting continued research in this area for clinical application.
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Affiliation(s)
- Nalu Navarro-Alvarez
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Beatriz Goncalves
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Alec R Andrews
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Zhaohui Wang
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Zhirui Wang
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Edward Harrington
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Jigesh Shah
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - David H Sachs
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Isaac Eliaz
- Amitabha Medical Clinic and Healing Center, Santa Rosa, California
| | - Christene A Huang
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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da Silva SS, Mizokami SS, Fanti JR, Costa IN, Bordignon J, Felipe I, Pavanelli WR, Verri WA, Conchon Costa I. Glucantime reduces mechanical hyperalgesia in cutaneous leishmaniasis and complete Freund's adjuvant models of chronic inflammatory pain. J Pharm Pharmacol 2018. [PMID: 29532470 DOI: 10.1111/jphp.12896] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 01/01/2023]
Abstract
OBJECTIVES To evaluate the analgesic effect of Glucantime (antimoniate N-methylglucamine) in Leishmania amazonensis infection and complete Freund's adjuvant (CFA), chronic paw inflammation model, in BALB/c mice. METHODS Two models of chronic inflammatory pain in BALB/c mice paw were used: infection with L. amazonensis and CFA stimulation. Both animals models received daily treatment with Glucantime (10 mg/kg, i.p.) and during the treatment was measured the mechanical hyperalgesia with electronic version of von Frey filaments. After the treatment, the paw skin sample was collected for analysis of myeloperoxidase (MPO) and N-acetyl-β-glucosaminidase (NAG) activity, and IL-1β, TNF-α, IL-6, IFN-γ and IL-10 cytokines production by ELISA. KEY FINDINGS Leishmania amazonensis-induced chronic inflammation with significant increase in mechanical hyperalgesia, MPO and NAG activity, and IL-1β, TNF-α and IL-6 production in the paw skin. Glucantime (10 mg/kg, i.p.) inhibited L. amazonensis-induced mechanical hyperalgesia and IL-1β and IL-6 cytokines productions. In chronic inflammatory model induced by CFA, Glucantime treatment during 7 days inhibited CFA-induced mechanical hyperalgesia, MPO and NAG activity, and IL-1β, TNF-α, IL-6 and IFN-γ production as well as increased IL-10 production. CONCLUSIONS Our data demonstrated that Glucantime reduced the chronic inflammatory pain induced by L. amazonensis and CFA stimuli by inhibiting the hyperalgesic cytokines production.
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Affiliation(s)
- Suelen S da Silva
- Laboratório de Parasitologia Experimental, Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil
| | - Sandra S Mizokami
- Laboratório de dor e Inflamação, Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil
| | - Jacqueline R Fanti
- Laboratório de Parasitologia Experimental, Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil
| | - Idessania N Costa
- Laboratório de Parasitologia Experimental, Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil
| | - Juliano Bordignon
- Laboratório de Virologia Molecular, Instituto Carlos Chagas (ICC/Fiocruz/PR), Curitiba, Brazil
| | - Ionice Felipe
- Laboratório de Parasitologia Experimental, Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil
| | - Wander R Pavanelli
- Laboratório de Parasitologia Experimental, Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil
| | - Waldiceu A Verri
- Laboratório de dor e Inflamação, Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil
| | - Ivete Conchon Costa
- Laboratório de Parasitologia Experimental, Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil
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18
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Wang YR, Xu H, Tao M, Xu LH, Fu XC. Ligustilide Relieves Complete Freund's Adjuvant-induced Mechanical Hyperalgesia through Inhibiting the Activation of Spinal c-Jun N-terminal Kinase/c-Jun Pathway in Rats. Pharmacogn Mag 2017; 13:634-638. [PMID: 29200725 PMCID: PMC5701403 DOI: 10.4103/pm.pm_546_16] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 12/04/2016] [Revised: 12/13/2016] [Indexed: 12/17/2022] Open
Abstract
Background: Ligustilide, an active ingredient in a traditional Chinese medicine, has anti-inflammatory and analgesic effects. The underlying mechanisms of the anti-inflammatory pain effects of ligustilide are not completely understood. Objective: The aim of this study to investigate whether ligustilide conducts its analgesic effects on the complete Freund's adjuvant (CFA)-induced inflammatory pain through regulating the c-Jun N-terminal kinase (JNK)/c-Jun pathway in the spinal cord. Materials and Methods: Paw withdrawal thresholds (PWTs) and paw withdrawal latencies (PWLs) were tested to examine the analgesic effect of ligustilide on CFA-induced inflammatory pain in rats. The change of spinal JNK/c-Jun activation was detected by western blotting after CFA injection with or without consecutive intrathecal ligustilide administration. After SP600125 (JNK inhibitor) was intrathecally injected in CFA rats, PWTs and PWLs were tested to investigate the change of ligustilide's analgesic effect. Results: Repeated intravenous injection of ligustilide could attenuate the pain hypersensitivity induced by CFA. CFA caused increased activation of spinal JNK/c-Jun, which could be inhibited by ligustilide administration. Intrathecal injection of JNK inhibitor inhibited the CFA-induced mechanical hyperalgesia. Conclusion: Ligustilide could inhibit the upregulation of spinal p-JNK/p-c-Jun caused by CFA, and the inhibition of JNK/c-Jun activation is closely related to its anti-mechanical hyperalgesia effect in inflammatory pain. SUMMARY Ligustilide, an active ingredient in a popular traditional Chinese medicine, has effective anti-inflammatory and analgesic effects. Ligustilide inhibits the complete Freund's adjuvant-induced activation of spinal c-Jun N-terminal kinase-(JNK)/c-Jun pathway in rats. The inhibition of JNK/c-Jun activation is closely related to the anti-mechanical hyperalgesia effect of ligustilide.
Abbreviations used: CFA: Complete Freund's adjuvant, JNK: c-Jun N-terminal kinase, MAPK: Mitogen-activated protein kinase, PWT: Paw withdrawal threshold, PWL: Paw withdrawal latency.
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Affiliation(s)
- Yi-Rui Wang
- Department of Anesthesiology, Huangyan Hospital, Wenzhou Medical University, Taizhou 318020, China
| | - Hui Xu
- Department of Anesthesiology, Huangyan Hospital, Wenzhou Medical University, Taizhou 318020, China
| | - Min Tao
- Department of Anesthesiology, Huangyan Hospital, Wenzhou Medical University, Taizhou 318020, China
| | - Li-Hua Xu
- Department of Anesthesiology, Huangyan Hospital, Wenzhou Medical University, Taizhou 318020, China
| | - Xin-Chun Fu
- Department of Anesthesiology, Huangyan Hospital, Wenzhou Medical University, Taizhou 318020, China
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Abstract
The pathogenesis of human autoimmune disorders is incompletely understood. This has led to the development of numerous murine models in which the pathogenesis of autoimmunity can be probed and the efficacy of novel therapies can be tested. One of the most widely-used murine models of autoimmunity is experimental autoimmune encephalomyelitis (EAE). To induce autoimmune pathology, mice are often immunized with an autoantigen alongside an adjuvant, typically complete Freund's adjuvant (CFA). Unfortunately, CFA causes significant inflammation at the site of administration. Despite the well-recognized complication of injection site inflammation, CFA with autoantigen immunization is widely used to induce central nervous system autoimmunity. We performed a literature review which allowed us to estimate that over 10,000 mice were immunized with CFA in published EAE studies in 2013. In this study, we demonstrated that subcutaneously administered myelin basic protein (MBP)-pulsed CD11c+ bone marrow-derived dendritic cells (BMDC) were as effective at inducing EAE as subcutaneously administered MBP plus CFA. Importantly, we also discovered that the CD11c+ BMDC caused significantly less injection site inflammation than MBP plus CFA immunization. This study demonstrated that the use of CD11c+ BMDC can enable the development of autopathogenic T-cells to be studied in vivo without the unwanted side-effects of long-lasting injection site inflammation. This model represents a significant refinement to existing EAE models and may lead to the improvement of the welfare of experimental mice used to study the development of autoimmunity in vivo.
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Affiliation(s)
- Louise Saul
- Medical Research Council/University of Edinburgh Centre for Inflammation Research and Centre for Multiple Sclerosis Research, Queen's Medical Research Institute, Edinburgh, UK
| | - Dario Besusso
- Medical Research Council/University of Edinburgh Centre for Inflammation Research and Centre for Multiple Sclerosis Research, Queen's Medical Research Institute, Edinburgh, UK
| | - Richard J Mellanby
- Medical Research Council/University of Edinburgh Centre for Inflammation Research and Centre for Multiple Sclerosis Research, Queen's Medical Research Institute, Edinburgh, UK
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, Division of Veterinary Clinical Studies, The University of Edinburgh, Hospital for Small Animals, Easter Bush Veterinary Centre, Roslin, Midlothian, UK
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20
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Abstract
CONTEXT Rheumatoid arthritis (RA), a disabling autoimmune disorder of the joints as well as other organs, affects about 1% of population. Unfortunately, all current treatments of RA cause severe gastrointestinal, renal and other complications. OBJECTIVE We aimed to evaluate the possible antiarthritic effects of a serotonin 5-HT3 receptor blocker, granisetron, and a nonselective adrenergic receptor blocker, carvedilol, on complete Freund's adjuvant-induced RA in adult female albino rats. MATERIALS AND METHODS Rats were allocated into a normal control group, an arthritis control group, two reference treatment groups receiving dexamethasone (1.5 mg/kg/day) and methotrexate (1 mg/kg/day), and two treatment groups receiving granisetron (2.5 mg/kg/day) and carvedilol (10 mg/kg/day). Serum-specific rheumatoid, immunological, inflammatory and oxidative stress biomarkers were assessed. A confirmatory histopathological study on joints and spleens was performed. RESULTS Granisetron administration significantly improved all the measured biomarkers, with the values of rheumatoid factor, matrix metalloproteinase-3, cartilage oligomeric matrix protein, immunoglobulin G, antinuclear antibody and myeloperoxidase being restored back to normal levels. Carvedilol administration significantly improved all biomarkers, with serum MPO value restored back to normal levels. DISCUSSION AND CONCLUSIONS Serotonin 5-HT3 receptor blockers and adrenergic receptor blockers, represented by granisetron and carvedilol, may represent new promising protective strategies against RA, at least owing to immune-modulator, anti-inflammatory and antioxidant potentials.
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Affiliation(s)
- Yasmin Moustafa Ahmed
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy , Nahda University , Beni-Suef , Egypt
| | | | - Ali Ahmed Abo-Saif
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy , Nahda University , Beni-Suef , Egypt
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Liu Y, Chen H, Lu J, Jiang Y, Yang R, Gao S, Dong X, Chen W. Urinary metabolomics of complete Freund's adjuvant-induced hyperalgesia in rats. Biomed Chromatogr 2017; 31. [PMID: 28058725 DOI: 10.1002/bmc.3886] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 09/25/2016] [Accepted: 10/31/2016] [Indexed: 12/20/2022]
Abstract
The aim of this study was to demonstrate the differences of metabolomics changes in a hyperalgesia model and find potent biomarkers of hyperalgesia. Seven rats were placed in metabolic cages. An emulsion containing 500 μg of Complete Freund's adjuvant (CFA) was used to induce hyperalgesia. Urine samples were collected prior to the injection of CFA and on post-injection days 1, 3 and 7. Ultraperformance liquid chromatography, coupled with quadrupole-time-of-flight mass spectrometry (UHPLC-Q-TOF/MS), was used for a quantitative analysis of urinary metabolic changes in the CFA-induced hyperalgesia model. Differences between the metabolic profiles of the rats in the four groups were analyzed using partial least squares discriminant analysis. Thirty-four potential urine metabolite biomarkers were identified, which changed in a trend similar to the pain threshold. These potential biomarkers were involved in 11 metabolic pathways, as follows: alanine, aspartate, and glutamate metabolism; ascorbate and aldarate metabolism; glycerolipid metabolism; glycerophospholipid metabolism; histidine metabolism; phenylalanine metabolism; sphingolipid metabolism; tryptophan metabolism; tyrosine metabolism; valine, leucine and isoleucine biosynthesis; and vitamin B6 metabolism. These results may improve our understanding of hyperalgesia and provide a basis for the clinical diagnosis of hyperalgesia.
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Affiliation(s)
- Yang Liu
- Student Brigade, Second Military Medical University, Shanghai, 200433, China
| | - Hui Chen
- Department of Anesthesiology, Changhai Hospital, Shanghai, 200433, China
| | - Jun Lu
- Department of Anesthesiology, Changhai Hospital, Shanghai, 200433, China
| | - Youshui Jiang
- Department of Anesthesiology, Changhai Hospital, Shanghai, 200433, China
| | - Rui Yang
- Student Brigade, Second Military Medical University, Shanghai, 200433, China
| | - Songyan Gao
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Xin Dong
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Wei Chen
- Department of Nephrology, Changhai Hospital, Shanghai, 200433, China
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22
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Zhang X, Dong Y, Dong H, Zhang W, Li F. Investigation of the effect of phlomisoside F on complete Freund's adjuvant-induced arthritis. Exp Ther Med 2016; 13:710-716. [PMID: 28352356 DOI: 10.3892/etm.2016.3995] [Citation(s) in RCA: 21] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 09/27/2016] [Indexed: 12/20/2022] Open
Abstract
Phlomis younghusbandii Mukerjee (Labiatae) has been reported to be effective in the treatment of rheumatoid arthritis (RA). In the present study, the anti-inflammatory and anti-arthritic effects of phlomisoside F (PF), isolated from P. younghusbandii Mukerjee (Labiatae), were investigated in male Wistar rats subjected to carrageen-induced paw edema and complete Freund's adjuvant (CFA)-induced arthritis. Arthritis scores were evaluated by a 5-point ordinal scale (scores 0-4). Expression levels of TNF-α, IL-1β, IL-6, IL-10, COX-2 and 5-LOX were determined via ELISA and western blot assays. Subsequent to establishing the edema and arthritis models, oral administration of PF (5, 10 and 20 mg/kg) significantly inhibited mean edema rate, compared with the control group in carrageenan-induced paw edema assay. In addition, administration of PF (5, 10 and 20 mg/kg/day) for 28 days markedly exhibited an anti-arthritic activity by offsetting the body weight loss, inhibiting the paw edema, reducing the arthritis scores and the indices of thymus and spleen, inhibiting the expression levels of TNF-α, IL-1β, IL-6, COX-2 and 5-LOX, and increasing the expression of IL-10, when compared with the respective control group in CFA-induced arthritis assay. In conclusion, PF is a valuable anti-arthritic constituent of P. younghusbandii, and the present study results suggest that this herb may be used in the treatment of RA.
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Affiliation(s)
- Xiuying Zhang
- Rheumatism Immunity Branch, Zibo Central Hospital, Zibo, Shandong 255036, P.R. China
| | - Yanfeng Dong
- Department of Cardiovasology, The People's Hospital of Zhangdian, Zibo, Shandong 255000, P.R. China
| | - Hanyu Dong
- Taishan Medical College, Taian, Shandong 271016, P.R. China
| | - Wen Zhang
- Central Lab of Zibo Central Hospital, Zibo, Shandong 255036, P.R. China
| | - Fang Li
- Rheumatism Immunity Branch, Taian Central Hospital, Taian, Shandong 271000, P.R. China
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Pundarikakshudu K, Shah DH, Panchal AH, Bhavsar GC. Anti-inflammatory activity of fenugreek ( Trigonella foenum-graecum Linn) seed petroleum ether extract. Indian J Pharmacol 2016; 48:441-444. [PMID: 27756958 PMCID: PMC4980935 DOI: 10.4103/0253-7613.186195] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Accepted: 06/11/2016] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES The aim of the present work was to study the anti-inflammatory and anti-arthritic activities of petroleum ether extract of fenugreek seeds. MATERIALS AND METHODS Fenugreek seed powder was extracted in petroleum ether by cold maceration. This fenugreek seed petroleum ether extract (FSPEE) was analyzed by gas-liquid chromatography (GLC) and tested on rats against carrageenan and formaldehyde-induced paw edema, complete Freund's adjuvant (CFA)-induced arthritis and cotton pellet-induced granuloma. Changes in serum glutamic oxaloacetic tansaminase (SGOT), serum glutamate-pyruvate transaminase (SGPT), and alkaline phosphatase (ALP) activities in liver and serum were also studied in cotton pellet-induced arthritic rats. Data were analyzed by Student's t-test. P <0.05 was considered statistically significant. RESULTS GLC of FSPEE showed oleic (33.61%), linoleic (40.37%), and linolenic (12.51%) acids. With 0.5 mL/kg FSPEE treatment, there was 37% (P < 0.05) and 85% (P < 0.05) reduction in inflammation of the paw in carrageenan and formaldehyde-induced paw edema. In CFA-induced arthritis, a biphasic increase in paw volume followed by decrease was seen. There was 42.5% (P < 0.01) reduction in the weight of cotton pellets and significant (P < 0.01) reductions in the elevated SGPT and ALP activities in serum and liver of FSPEE (0.5 mL/kg) treated rats. CONCLUSION Thus, petroleum ether extract of fenugreek seeds has significant anti-inflammatory and anti-arthritic activities which are due to the presence of linolenic and linoleic acids.
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Affiliation(s)
- Kilambi Pundarikakshudu
- Department of Pharmacognosy, L. J. Institute of Pharmacy, Between Sarkhej Circle and Kataria Motors, Ahmedabad, Gujarat, India
| | - Deepak H. Shah
- Department of Pharmacology, Shree S. K. Patel College of Pharmaceutical Education and Research, Ganpat Vidyanagar, Kherva, Gujarat, India
| | - Aashish H. Panchal
- Department of Pharmacology, L. J. Institute of Pharmacy, Between Sarkhej Circle and Kataria Motors, Ahmedabad, Gujarat, India
| | - Gordhanbhai C. Bhavsar
- Department of Pharmacognosy, Shree S. K. Patel College of Pharmaceutical Education and Research, Ganpat Vidyanagar, Kherva, Gujarat, India
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Hamity MV, Walder RY, Hammond DL. Increased neuronal expression of neurokinin-1 receptor and stimulus-evoked internalization of the receptor in the rostral ventromedial medulla of the rat after peripheral inflammatory injury. J Comp Neurol 2015; 522:3037-51. [PMID: 24639151 DOI: 10.1002/cne.23564] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/31/2014] [Accepted: 02/18/2014] [Indexed: 12/28/2022]
Abstract
This study examined possible mechanisms by which Substance P (Sub P) assumes a pronociceptive role in the rostral ventromedial medulla (RVM) under conditions of peripheral inflammatory injury, in this case produced by intraplantar (ipl) injection of complete Freund's adjuvant (CFA). In saline- and CFA-treated rats, neurokinin-1 receptor (NK1R) immunoreactivity was localized to neurons in the RVM. Four days after ipl injection of CFA, the number of NK1R-immunoreactive neurons in the RVM was increased by 30%, and there was a concomitant increase in NK1R-immunoreactive processes in CFA-treated rats. Although NK1R immunoreactivity was increased, tachykinin-1 receptor (Tacr1) mRNA was not increased in the RVM of CFA-treated rats. To assess changes in Sub P release, the number of RVM neurons that exhibited NK1R internalization was examined in saline- and CFA-treated rats following noxious heat stimulation of the hind paws. Only CFA-treated rats that experienced noxious heat stimulation exhibited a significant increase in the number of neurons showing NK1R internalization. These data suggest that tonic Sub P release is not increased as a simple consequence of peripheral inflammation, but that phasic or evoked release of Sub P in the RVM is increased in response to noxious peripheral stimulation in a persistent inflammatory state. These data support the proposal that an upregulation of the NK1R in the RVM, as well as enhanced release of Sub P following noxious stimulation, underlie the pronociceptive role of Sub P under conditions of persistent inflammatory injury.
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Affiliation(s)
- Marta V Hamity
- Department of Anesthesia, University of Iowa, Iowa City, Iowa, 52242
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25
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Wang HP, He ZG. Treatment with in complete Freund's adjuvant and Listeria monocytogenes delays diabetes via an interleukin-17-secretion-independent pathway. Exp Ther Med 2015; 9:1934-1938. [PMID: 26136917 DOI: 10.3892/etm.2015.2328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 05/08/2014] [Accepted: 11/12/2014] [Indexed: 11/06/2022] Open
Abstract
Non-obese diabetes (NOD) mice are widely used as an animal model in studies of type I diabetes (TID). Treatment with complete Freund's adjuvant (CFA) in pro-diabetic NOD mice is known to inhibit disease progression by activating CD1d-specific natural killer (NK) T cells and inducing interleukin (IL)-17 secretion in innate immune cells. The aim of the present study was to examine the effect of incomplete Freund's adjuvant (IFA) and L. monocytogenes treatment on the development of TID in NOD mice. This combined treatment of IFA and L. monocytogenes, a microbe that infects the liver and is primarily combatted by NK and cytotoxic T lymphocytes, was applied to mimic CFA treatment in pro-diabetic NOD mice. The combined IFA + L. monocytogenes treatment effectively delayed TID development in the NOD mice. In contrast to CFA, the IFA + L. monocytogenes treatment did not induce T cells or innate immune cells to secrete IL-17. However, increased levels of regulatory T cells were detected. Furthermore, IFA + L. monocytogenes mice exhibited higher levels of IgG2a, although no notable T helper 1 cell response was observed when compared with the CFA or IFA control treated mice. Therefore, combined IFA + L. monocytogenes treatment was shown to delay TID development in NOD mice via a novel mechanism, which was independent from the secretion of IL-17 by CFA-activated NKT cells.
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Affiliation(s)
- Hai-Ping Wang
- Department of Pharmacy, East Hospital of Tongji University, Shanghai 200120, P.R. China
| | - Zhi-Gao He
- Department of Pharmacy, East Hospital of Tongji University, Shanghai 200120, P.R. China
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26
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Jiang YL, He XF, Shen YF, Yin XH, DU JY, Liang YI, Fang JQ. Analgesic roles of peripheral intrinsic met-enkephalin and dynorphin A in long-lasting inflammatory pain induced by complete Freund's adjuvant in rats. Exp Ther Med 2015; 9:2344-2348. [PMID: 26136984 DOI: 10.3892/etm.2015.2407] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 11/17/2014] [Indexed: 11/05/2022] Open
Abstract
Previous studies have focused on strategies for pain relief based on the peripheral opioid system. However, little is known with regard to the profile of the peripheral opioid system in long-lasting inflammatory pain. In the current study, the intrinsic changes of the peripheral opioids were investigated in long-lasting inflammatory pain. A rat model of complete Freund's adjuvant (CFA)-induced inflammatory pain was established. Paw swelling and thermal hyperalgesia (paw withdrawal latency, PWL) were analyzed until day 18 after the CFA injection. The levels of peripheral opioids and their upstream inducers, corticotrophin-releasing factor (CRF) and interleukin (IL)-1β, were measured, and validation experiments were performed using opioid receptor antagonists. Long-lasting inflammatory pain was successfully induced in the rats, as shown by the significantly increased paw swelling and decreased PWLs. On day 18 after the CFA injection, the IL-1β levels were significantly elevated, while CRF remained at a normal level in the paw inflammatory tissue. In addition, met-enkephalin (Met-ENK) and dynorphin A (DYN A) levels were significantly increased, while the β-endorphin level remained normal. Local intraplantar administration of δ- and κ-opioid receptor antagonists resulted in more substantial pain, but did not significantly affect the PWLs of the normal control rats. Therefore, the results indicated that the increased levels of local Met-ENK and DYN A in CFA-induced long-lasting inflammatory pain may be involved in peripheral intrinsic analgesia.
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Affiliation(s)
- Yong-Liang Jiang
- Department of Neurobiology and Acupuncture Research, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Xiao-Fen He
- Department of Neurobiology and Acupuncture Research, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Ya-Fang Shen
- Department of Neurobiology and Acupuncture Research, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Xiao-Hu Yin
- Department of Neurobiology and Acupuncture Research, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Jun-Ying DU
- Department of Neurobiology and Acupuncture Research, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Y I Liang
- Department of Neurobiology and Acupuncture Research, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Jian-Qiao Fang
- Department of Neurobiology and Acupuncture Research, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
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27
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Li JX, Thorn DA, Qiu Y, Peng BW, Zhang Y. Antihyperalgesic effects of imidazoline I(2) receptor ligands in rat models of inflammatory and neuropathic pain. Br J Pharmacol 2014; 171:1580-90. [PMID: 24329196 DOI: 10.1111/bph.12555] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 11/18/2013] [Accepted: 12/05/2013] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE A new imidazoline I2 receptor ligand, CR4056, is effective for chronic inflammatory pain and diabetic neuropathy. However, it is unclear whether other I2 receptor ligands have similar effects and whether antinociceptive tolerance develops with repeated treatment. EXPERIMENTAL APPROACH The Von Frey filament test was used to measure mechanical hyperalgesia and the plantar test to measure thermal hyperalgesia in rats injected with complete Freund's adjuvant (CFA) treatment or had undergone surgery to induce chronic constriction injury (CCI), models of inflammatory pain and peripheral neuropathic pain respectively. The effects of morphine and I2 receptor ligands, 2-BFI, BU224, tracizoline and CR4056, 3.2-32 mg·kg(-1) , i.p., on hyperalgesia or affective pain (as measured by a place escape/avoidance paradigm) were studied in separate experiments. KEY RESULTS Morphine and the I2 receptor ligands (2-BFI, BU224 and tracizoline) all dose-dependently attenuated mechanical and thermal hyperalgesia in CFA-treated rats. The anti-hyperalgesic effects of 2-BFI in CFA-treated and CCI rats were attenuated by the I2 receptor antagonist idazoxan. The combination of 2-BFI and morphine produced additive effects against mechanical hyperalgesia in CFA-treated rats. Repeated treatment (daily for 7-9 days) with 2-BFI or CR4056 did not produce antinociceptive tolerance in CFA-treated or CCI rats. Morphine and the I2 receptor ligands (2-BFI, BU224 and CR4056) were all effective at attenuating place escape/avoidance behaviour in CFA-treated rats. CONCLUSIONS AND IMPLICATIONS Imidazoline I2 receptor ligands have antihyperalgesic effects in rat models of inflammatory and neuropathic pain and may represent a new class of pharmacotherapeutics for the management of chronic pain.
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Affiliation(s)
- Jun-Xu Li
- Department of Pharmacology and Toxicology, University at Buffalo, Buffalo, NY, USA
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28
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Zhao LX, Jiang BC, Wu XB, Cao DL, Gao YJ. Ligustilide attenuates inflammatory pain via inhibition of NFκB-mediated chemokines production in spinal astrocytes. Eur J Neurosci 2014; 39:1391-402. [PMID: 24521480 DOI: 10.1111/ejn.12502] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 12/03/2013] [Accepted: 01/05/2014] [Indexed: 12/22/2022]
Abstract
Ligustilide (LIG) is a major component of Radix Angelica Sinensis, and reportedly has neuroprotective and anti-inflammatory effects. Recent studies have demonstrated that spinal astrocyte-mediated neuroinflammation plays an important role in the pathogenesis of chronic pain. Here we investigated the anti-nociceptive effect of systemic treatment with LIG on chronic inflammatory pain and explored possible mechanisms. Unilateral hindpaw injection of complete Freund's adjuvant (CFA) induced persistent pain hypersensitivity. Repeated daily intravenous treatment with LIG, either before or after CFA injection, attenuated CFA-induced thermal hyperalgesia and mechanical allodynia. The same treatment also inhibited CFA-induced keratinocyte-derived chemokine (KC) and monocyte chemoattractant protein-1 (MCP-1) mRNA and protein increases in astrocytes of the spinal cord. In vitro study showed LIG dose-dependently reduced lipopolysaccharide (LPS)-induced upregulation of KC and MCP-1 mRNA in astrocyte cultures. Interestingly, LIG treatment did not affect CFA- or LPS-induced glial fibrillary acidic protein upregulation, but did inhibit CFA-induced phosphorylated nuclear factor-κB (p-NFκB) upregulation in spinal astrocytes. Furthermore, intrathecal injection of NFκB inhibitor attenuated CFA-induced pain hypersensitivity and upregulation of KC and MCP-1 in the spinal cord. Finally, single intravenous injection of LIG attenuated intrathecal injection of LPS-induced mechanical allodynia. The same treatment also decreased LPS-induced NFκB activation and KC and MCP-1 upregulation in the spinal cord. These data indicate that LIG attenuates chronic inflammatory pain potentially via inhibiting NFκB-mediated chemokines production in spinal astrocytes. These results provide direct evidence of the anti-nociceptive and anti-inflammatory effects of LIG, suggesting a new application of LIG for the treatment of chronic inflammatory pain.
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Affiliation(s)
- Lin-Xia Zhao
- Pain Research Laboratory, Institute of Nautical Medicine, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, 226001, China
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Yao YX, Zhang YF, Yang Y, Guo SH, Jiang Z, Zhao ZQ. Spinal synaptic scaffolding protein Homer 1b/c regulates CREB phosphorylation and c-fos activation induced by inflammatory pain in rats. Neurosci Lett 2013; 559:88-93. [PMID: 24316406 DOI: 10.1016/j.neulet.2013.11.049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [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: 09/10/2013] [Revised: 11/19/2013] [Accepted: 11/26/2013] [Indexed: 11/30/2022]
Abstract
Previous studies have shown that spinal Homer 1b/c plays an important role in the maintenance of chronic inflammatory pain induced by complete Freund's adjuvant (CFA). This study investigated the possible mechanism underlying Homer 1b/c mediating CFA-induced inflammatory pain. Chronic inflammation was induced by CFA injection into the left hind ankle of the rat. Homer 1b/c antisense or missense oligonucleotides were administered intrathecally (10μg/10μl) from 5 to 8 days following the onset of inflammation. Immunohistochemistry was conducted to detect the expression of phosphorylated cAMP response element binding protein (pCREB) and Fos protein in the spinal dorsal horn. Intrathecal administration of Homer 1b/c antisense oligonucleotides not only markedly reduced the expression of Homer 1b/c protein, but also attenuated CFA-induced inflammation, spinal CREB phosphorylation, and Fos expression. These results demonstrate for the first time that Homer 1b/c regulates CREB phosphorylation and c-fos activation in the spinal dorsal horn during the maintenance of chronic inflammatory pain, suggesting that Homer 1b/c may be involved in the development of CFA-induced inflammation.
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Affiliation(s)
- Yong-Xing Yao
- Department of Anesthesia, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yan-Feng Zhang
- Department of Anesthesia, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yan Yang
- Institute of Neurobiology, Institutes of Brain Science and State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China
| | - Shao-Hui Guo
- Department of Anesthesia, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhen Jiang
- Department of Anesthesia, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhi-Qi Zhao
- Institute of Neurobiology, Institutes of Brain Science and State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, China.
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Lima M, Malheiros J, Negrigo A, Tescarollo F, Medeiros M, Suchecki D, Tannús A, Guinsburg R, Covolan L. Sex-related long-term behavioral and hippocampal cellular alterations after nociceptive stimulation throughout postnatal development in rats. Neuropharmacology 2013; 77:268-76. [PMID: 24148811 DOI: 10.1016/j.neuropharm.2013.10.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 10/03/2013] [Accepted: 10/06/2013] [Indexed: 01/21/2023]
Abstract
Early noxious stimuli may alter the neurogenesis rate in the dentate gyrus and the behavioral repertoire of adult rats. This study evaluated the long-term effects of noxious stimulation, imposed in different phases of development, on nociceptive and anxiety-like behaviors, hippocampal activation, cell proliferation, hippocampal BDNF and plasma corticosterone levels in 40 day-old male and female adolescents. Noxious stimulation was induced by intra-plantar injection of Complete Freund's adjuvant (CFA), on postnatal days (P) 1 (group P1), 8 (P8) or 21 (P21). Control animals were not stimulated in any way. On P21 a subset of animals from each group received BrdU and was perfused on P40 for identification of proliferating cells in the granule cell layer of the dentate gyrus. Another subset of rats was subjected to behavioral testing on P40 and one week later, to magnetic resonance imaging (MRI) acquisition. Noxious stimulation evoked hypoalgesia in adolescents, mainly in females (P < 0.02), reflected by greater latency to withdraw the paw and less paw lickings in the hot plate test than controls (P < 0.001). It also resulted in more time spent in the open arms, e.g., less anxiety-like behavior than controls (P < 0.01), especially in females (P < 0.01, compared with males). Proliferative cell rate in the dentate gyrus was the highest in P8 males and females (P < 0.001), with males exhibiting more proliferation than females on P1 and P8, which was directly related to the hippocampal levels of BDNF and inversely related to plasma corticosterone. Sex differences were also detected in manganese-enhanced MRI signal, which was more prominent in P1 females than males (P < 0.01). This study represents the first step of investigation on the cellular basis of the sex-dependent long-term consequences of nociceptive stimuli in newborns.
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Affiliation(s)
- Márcia Lima
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Jackeline Malheiros
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil; Centro de Imagens e Espectroscopia in vivo por Ressonância Magnética (CIERMag), Instituto de Física de São Carlos, Universidade de São Paulo (IFSC-USP), São Carlos 13566-590, Brazil
| | - Aline Negrigo
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Fabio Tescarollo
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Magda Medeiros
- Departamento de Ciências Fisiológicas, Universidade Federal Rural do Rio de Janeiro, Seropédica 23890-000, Brazil
| | - Deborah Suchecki
- Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo 04023-062, Brazil
| | - Alberto Tannús
- Centro de Imagens e Espectroscopia in vivo por Ressonância Magnética (CIERMag), Instituto de Física de São Carlos, Universidade de São Paulo (IFSC-USP), São Carlos 13566-590, Brazil
| | - Ruth Guinsburg
- Disciplina de Pediatria Neonatal, Departamento de Pediatria, Universidade Federal de São Paulo, São Paulo 04023-062, Brazil
| | - Luciene Covolan
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil.
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Kuerten S, Wunsch M, Lehmann PV. Longitudinal T cell-derived IFN-γ/IL-17 balances do not correlate with the disease course in two mouse models of experimental autoimmune encephalomyelitis. J Immunol Methods 2013; 398-399:68-75. [PMID: 24076090 DOI: 10.1016/j.jim.2013.09.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Revised: 09/12/2013] [Accepted: 09/17/2013] [Indexed: 12/14/2022]
Abstract
The concept of TH17 stemness is attracting increasing attention in the field of tumor immunology. The expression of stem cell-like properties and the promotion of long-term immunity by TH17 cells are also of outmost relevance for autoimmunity. Studying two mouse models of multiple sclerosis (MS), we show that CNS antigen-specific TH17 cells occur in high frequencies in the individual mice. However, there was no preferential shift towards a TH17 response over time. These data suggest that there is no evidence for a differential apoptosis rate in TH1 versus TH17 cells in EAE. Apparently the selective enrichment of TH17 cells that can occur under certain conditions such as cancer does not result from an intrinsic property of TH17 cells, but rather from selective pressure present in the microenvironment.
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Gangaplara A, Massilamany C, Steffen D, Reddy J. Mimicry epitope from Ehrlichia canis for interphotoreceptor retinoid-binding protein 201-216 prevents autoimmune uveoretinitis by acting as altered peptide ligand. J Neuroimmunol 2013; 263:98-107. [PMID: 24029580 DOI: 10.1016/j.jneuroim.2013.08.006] [Citation(s) in RCA: 6] [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: 12/17/2012] [Revised: 05/28/2013] [Accepted: 08/12/2013] [Indexed: 10/26/2022]
Abstract
We report here identification of novel mimicry epitopes for interphotoreceptor retinoid-binding protein (IRBP) 201-216, a candidate ocular antigen that causes experimental autoimmune uveoretinitis (EAU) in A/J mice. One mimicry epitope from Ehrlichia canis (EHC), designated EHC 44-59, induced cross-reactive T cells for IRBP 201-216 capable of producing T helper (Th)1 and Th17 cytokines, but failed to induce EAU in A/J mice. In addition, animals first primed with suboptimal doses of IRBP 201-216 and subsequently immunized with EHC 44-59 did not develop EAU; rather, the mimicry epitope prevented the disease induced by IRBP 201-216. However, alteration in the composition of EHC 44-59 by substituting alanine with valine at position 49, similar to the composition of IRBP 201-216, enabled the mimicry epitope to acquire uveitogenicity. The data provide new insights as to how microbes containing mimicry sequences for retinal antigens can prevent ocular inflammation by acting as naturally occurring altered peptide ligands.
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Affiliation(s)
- Arunakumar Gangaplara
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583, United States
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Samara P, Kalbacher H, Ioannou K, Radu DL, Livaniou E, Promponas VJ, Voelter W, Tsitsilonis O. Development of an ELISA for the quantification of the C-terminal decapeptide prothymosin α(100-109) in sera of mice infected with bacteria. J Immunol Methods 2013; 395:54-62. [PMID: 23831611 DOI: 10.1016/j.jim.2013.06.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 06/21/2013] [Accepted: 06/21/2013] [Indexed: 11/20/2022]
Abstract
Apoptosis is characterized by a series of discrete biochemical events, among which is the truncation of the nuclear polypeptide prothymosin alpha (proTα) by activated caspase-3. This early apoptotic event results in the generation of a carboxy-terminal fragment of proTα, the immunoactive decapeptide proTα(100-109). We hypothesized that the detection of increased levels of proTα(100-109) in serum can be directly correlated with the induction of massive cell apoptosis, resulting from a severe bacterial infection. Thus, using high-affinity-purified polyclonal antibodies (Abs), raised in rabbits and a prototype antibody-capture system, we developed a highly sensitive and specific competitive ELISA for proTα(100-109). The sensitivity of the ELISA (0.1ng/mL to 10μg/mL) is acceptable for the quantification of the decapeptide in serum samples. To assess our initial hypothesis, we determined the concentration of proTα(100-109) in the sera of mice infected with the bacterium Streptococcus pyogenes over the course of the infection. We show that serum concentration of proTα(100-109) was marginal to undetectable before infection, increased over time and peaked at 72h postinfection. In silico analysis suggests that the Abs generated are unlikely to cross-react with any other unrelated mouse or bacterial protein. Further validation of our ELISA using serum samples from humans, infected with bacteria, may provide a useful tool to differentiate the causative agent of a potentially lethal septic infection.
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Horai R, Silver PB, Chen J, Agarwal RK, Chong WP, Jittayasothorn Y, Mattapallil MJ, Nguyen S, Natarajan K, Villasmil R, Wang P, Karabekian Z, Lytton SD, Chan CC, Caspi RR. Breakdown of immune privilege and spontaneous autoimmunity in mice expressing a transgenic T cell receptor specific for a retinal autoantigen. J Autoimmun 2013; 44:21-33. [PMID: 23810578 DOI: 10.1016/j.jaut.2013.06.003] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 06/01/2013] [Accepted: 06/04/2013] [Indexed: 12/22/2022]
Abstract
Despite presence of circulating retina-specific T cells in healthy individuals, ocular immune privilege usually averts development of autoimmune uveitis. To study the breakdown of immune privilege and development of disease, we generated transgenic (Tg) mice that express a T cell receptor (TCR) specific for interphotoreceptor retinoid-binding protein (IRBP), which serves as an autoimmune target in uveitis induced by immunization. Three lines of TCR Tg mice, with different levels of expression of the transgenic R161 TCR and different proportions of IRBP-specific CD4⁺ T cells in their peripheral repertoire, were successfully established. Importantly, two of the lines rapidly developed spontaneous uveitis, reaching 100% incidence by 2 and 3 months of age, respectively, whereas the third appeared "poised" and only developed appreciable disease upon immune perturbation. Susceptibility roughly paralleled expression of the R161 TCR. In all three lines, peripheral CD4⁺ T cells displayed a naïve phenotype, but proliferated in vitro in response to IRBP and elicited uveitis upon adoptive transfer. In contrast, CD4⁺ T cells infiltrating uveitic eyes mostly showed an effector/memory phenotype, and included Th1, Th17 as well as T regulatory cells that appeared to have been peripherally converted from conventional CD4⁺ T cells rather than thymically derived. Thus, R161 mice provide a new and valuable model of spontaneous autoimmune disease that circumvents the limitations of active immunization and adjuvants, and allows to study basic mechanisms involved in maintenance and breakdown of immune homeostasis affecting immunologically privileged sites such as the eye.
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Alsharari SD, Freitas K, Damaj MI. Functional role of alpha7 nicotinic receptor in chronic neuropathic and inflammatory pain: studies in transgenic mice. Biochem Pharmacol 2013; 86:1201-7. [PMID: 23811428 DOI: 10.1016/j.bcp.2013.06.018] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [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: 05/15/2013] [Revised: 06/20/2013] [Accepted: 06/20/2013] [Indexed: 11/27/2022]
Abstract
A growing body of evidence indicates that α7 nicotinic receptor subtypes play an important role in chronic inflammatory and neuropathic pain signaling. In the present study, we investigated the role of the endogenous α7 nicotinic receptors (nAChRs) signaling in pain and inflammation using transgenic mice. For that we evaluated pain-related behaviors in the α7 mutant mice (KO) and its complementary α7 hypersensitive mice (KI) expressing the L250T α7 nAChRs and their respective WT mice in acute, chronic inflammatory and neuropathic mouse models. α7 KO and KI mice showed no significant changes in pain responses evoked by acute noxious thermal and mechanical stimuli as compared with WT littermates. While α7 KO mice showed no alterations in thermal and mechanical allodynia compared to WT mice after chronic nerve injury in the CCI test, α7 KI mice showed a significant reduction in these pain-related responses. However, marked increase in edema, hyperalgesia, and allodynia associated with intraplantar CFA injection was observed in the α7 KO mice compared with the WT littermates. In contrast, α7 KI mice displayed lesser degree of hyperalgesia and allodynia after CFA injection. Finally, the ability of systemic nicotine to reverse already-developed mechanical allodynia produced by intraplantar CFA seen in WT mice was lost in the α7 KO animals. Overall, our results demonstrate that endogenous α7 nAChRs mechanisms play an important role in chronic inflammatory and neuropathic pain models. This provides an additional rationale for the utility of α7 nAChR agonists in the treatment of inflammatory and chronic pain.
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Affiliation(s)
- Shakir D Alsharari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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Kwon A, Jeon SM, Hwang SH, Kim JH, Cho HJ. Expression and functional role of metallothioneins I and II in the spinal cord in inflammatory and neuropathic pain models. Brain Res 2013; 1523:37-48. [PMID: 23726995 DOI: 10.1016/j.brainres.2013.05.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 04/19/2013] [Accepted: 05/21/2013] [Indexed: 11/19/2022]
Abstract
In this study, the expression and functional role of metallothioneins I and II (MT-I/II) were evaluated in the spinal cord in rat models of inflammatory and neuropathic pain. Complete Freund's adjuvant (CFA) injection into the hindpaw induced an increase in MT-I/II protein expression in bilateral dorsal and ventral horns throughout the spinal cord, while chronic constriction injury (CCI) of the sciatic nerve induced an increase in MT-I/II expression in the ipsilateral dorsal and ventral horns of the lower lumbar spinal cord. Increased MT-I/II immunoreactivity was predominantly localized to vascular endothelial cells. CFA injection- and CCI-induced MT-I/II expression was inhibited by intrathecal administration of MT-I siRNA. Treatment with MT-I siRNA before CFA injection or at early time points after CCI resulted in a significant attenuation of mechanical allodynia and thermal hyperalgesia, while treatment at later time points had no effect on established pain behaviors. Our results suggest that endogenous MT-I/II might play an important role in the pathogenesis of pain behaviors, participating in the initiation of inflammatory and neuropathic pain rather than in their maintenance.
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Affiliation(s)
- Aram Kwon
- Department of Anatomy, School of Medicine, Kyungpook National University, 2-101, Dongin Dong, Daegu 702-422, South Korea
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Schellenberger MT, Grova N, Farinelle S, Willième S, Schroeder H, Muller CP. Modulation of benzo[a]pyrene induced neurotoxicity in female mice actively immunized with a B[a]P-diphtheria toxoid conjugate. Toxicol Appl Pharmacol 2013; 271:175-83. [PMID: 23684556 DOI: 10.1016/j.taap.2013.05.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 04/19/2013] [Accepted: 05/06/2013] [Indexed: 12/29/2022]
Abstract
Benzo[a]pyrene (B[a]P) is a small molecular weight carcinogen and the prototype of polycyclic aromatic hydrocarbons (PAHs). While these compounds are primarily known for their carcinogenicity, B[a]P and its metabolites are also neurotoxic for mammalian species. To develop a prophylactic immune strategy against detrimental effects of B[a]P, female Balb/c mice immunized with a B[a]P-diphtheria toxoid (B[a]P-DT) conjugate vaccine were sub-acutely exposed to 2mg/kg B[a]P and behavioral performances were monitored in tests related to learning and memory, anxiety and motor coordination. mRNA expression of the NMDA receptor (NR1, 2A and 2B subunits) involved in the above behavioral functions was measured in 5 brain regions. B[a]P induced NMDA1 expression in three (hippocampus, amygdala and cerebellum) of five brain regions investigated, and modulated NMDA2 in two of the five brain regions (frontal cortex and cerebellum). Each one of these B[a]P-effects was reversed in mice that were immunized against this PAH, with measurable consequences on behavior such as anxiety, short term learning and memory. Thus active immunization against B[a]P with a B[a]P-DT conjugate vaccine had a protective effect and attenuated the pharmacological and neurotoxic effects even of high concentrations of B[a]P.
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Affiliation(s)
- Mario T Schellenberger
- Institute of Immunology, Centre de Recherche Public de la Santé/Laboratoire National de Santé, 20A rue Auguste Lumière, L-1950 Luxembourg, Grand-Duchy of Luxembourg
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Podojil JR, Liu LN, Marshall SA, Chiang MY, Goings GE, Chen L, Langermann S, Miller SD. B7-H4Ig inhibits mouse and human T-cell function and treats EAE via IL-10/Treg-dependent mechanisms. J Autoimmun 2013; 44:71-81. [PMID: 23683881 DOI: 10.1016/j.jaut.2013.04.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2012] [Revised: 03/06/2013] [Accepted: 04/01/2013] [Indexed: 02/02/2023]
Abstract
We evaluated the therapeutic efficacy and mechanisms of action of both mouse and human B7-H4 Immunoglobulin fusion proteins (mB7-H4Ig; hB7-H4Ig) in treating EAE. The present data show that mB7-H4Ig both directly and indirectly (via increasing Treg function) inhibited CD4⁺ T-cell proliferation and differentiation in both Th1- and Th17-cell promoting conditions while inducing production of IL-10. B7-H4Ig treatment effectively ameliorated progression of both relapsing (R-EAE) and chronic EAE correlating with decreased numbers of activated CD4⁺ T-cells within the CNS and spleen, and a concurrent increase in number and function of Tregs. The functional requirement for Treg activation in treating EAE was demonstrated by a loss of therapeutic efficacy of hB7-H4Ig in R-EAE following inactivation of Treg function either by anti-CD25 treatment or blockade of IL-10. Significant to the eventual translation of this treatment into clinical practice, hB7-H4Ig similarly inhibited the in vitro differentiation of naïve human CD4⁺ T-cells in both Th1- and Th17-promoting conditions, while promoting the production of IL-10. B7-H4Ig thus regulates pro-inflammatory T-cell responses by a unique dual mechanism of action and demonstrates significant promise as a therapeutic for autoimmune diseases, including MS.
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Blaževski J, Petković F, Momčilović M, Jevtic B, Miljković D, Mostarica Stojković M. High interleukin-10 expression within the central nervous system may be important for initiation of recovery of Dark Agouti rats from experimental autoimmune encephalomyelitis. Immunobiology 2013; 218:1192-9. [PMID: 23664544 DOI: 10.1016/j.imbio.2013.04.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [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: 03/07/2013] [Revised: 04/03/2013] [Accepted: 04/07/2013] [Indexed: 10/27/2022]
Abstract
Dark Agouti (DA) rats are highly susceptible to induction of experimental autoimmune encephalomyelitis (EAE), still they completely recover from the disease. Here, we were interested to determine contribution of major anti-inflammatory cytokines transforming growth factor (TGF)-β and interleukin (IL)-10 to the recovery of DA rats from EAE. To that extent we determined CNS expression of these cytokines in DA rats at different phases of EAE and compared data to those obtained in EAE-resistant Albino Oxford (AO) rats. Higher expression of TGF-β was persistently observed in the CNS of AO rats, even if rats were not immunized. This implied that high TGF-β within the CNS is important for resistance of AO rats to EAE induction. On the contrary, IL-10 expression was consistently higher in DA than in AO rats and it culminated at the peak of EAE. Methylprednisolone suppressed EAE and expression of IL-10 in spinal cord homogenates, while IL-10 was increased in CNS-infiltrating immune cells. This implied that IL-10 might have a significant role in recovery of DA rats from the disease. Thus, we next explored effects of IL-10 on astrocytes, glial cells that largely contribute to control of CNS inflammation. IL-10 stimulated astrocytic expression of an important regulator of neuroinflammation, CXCL12. Thus, IL-10 might contribute to recovery of DA rats from EAE through induction of CXCL12 expression in astrocytes.
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Affiliation(s)
- Jana Blaževski
- Department of Immunology, Institute for Biological Research, Siniša Stanković, University of Belgrade, Serbia
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Gu Z, Chhabra AY, Alard P, Warner DR, Kosiewicz MM. FcγRI is required for TGFβ2-treated macrophage-induced tolerance. Immunobiology 2013; 218:1200-6. [PMID: 23643295 DOI: 10.1016/j.imbio.2013.04.003] [Citation(s) in RCA: 5] [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: 07/03/2012] [Revised: 03/04/2013] [Accepted: 04/07/2013] [Indexed: 11/29/2022]
Abstract
Macrophages treated with TGFβ2 (TGFβ2-Mϕ) and antigen are highly tolerogenic in vivo, and induce antigen-specific and long-lasting tolerance in both naïve and primed mice via induction of suppressor/regulatory T cells. In this study, we examined the molecular pathways, including the requirements for Smad-dependent signaling, that are involved in the induction and function of tolerogenic TGFβ2-Mϕ. Treatment of murine macrophages with TGFβ2 induced translocation of Smad2/3 to the nucleus, and impairment of Smad3-, but not Smad2-, dependent signaling inhibited the tolerogenic function of a TGFβ2-treated murine macrophage cell line. Gene expression in murine macrophages treated with TGFβ2 was evaluated by microarray analysis. The FcγRI gene was one of a number of immune-related genes differentially expressed in TGFβ2-Mϕ, and appeared to be critical for tolerance in this system, since TGFβ2-Mϕ from FcγRI deficient mice were unable to induce tolerance. The role that FcγRI plays in TGFβ2-Mϕ-mediated tolerance is currently unclear. The results of this study provide important information about the factors that are critical for the induction of TGFβ2-Mϕ-mediated tolerance, and a better understanding of these mechanisms could lead to the development of more effective tolerance-inducing strategies for the treatment of autoimmune/inflammatory diseases.
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Affiliation(s)
- Z Gu
- Department of Microbiology & Immunology, University of Louisville, Louisville, KY 40202, USA
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