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Zhou F, Qian HY, Wang K, Gu YJ, Liu PL, Zhang L, Chen L, Song Y, Chen YN, Zhang HL. Metformin relieves bone cancer pain by reducing TGFβRI-TRPV1 signaling in rats. Heliyon 2024; 10:e34991. [PMID: 39157315 PMCID: PMC11328085 DOI: 10.1016/j.heliyon.2024.e34991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 07/18/2024] [Accepted: 07/19/2024] [Indexed: 08/20/2024] Open
Abstract
Common cancer complications include bone cancer pain (BCP), which was not sufficiently alleviated by traditional analgesics. More safe and effective therapy was urgent needed. Metformin relieved osteoarthritis pain, but the analgesia of Metformin in BCP was not well studied. The study aimed to explore the Metformin-mediated analgesic effect and its molecular mechanisms in BCP rats. We demonstrated that Walker 256 cell transplantation into the medullary cavity of the tibia worsened mechanical allodynia in BCP rats, increased the expression of TGFβ1 in the metastatic bone tissue, and raised the expression of TGFβRI and TRPV1 in the L4-6 dorsal root ganglion (DRG) of BCP rats. While, selectively blockade of TGFβRI by SD208 could obviously elevated the paw withdraw threshold (PWT) of BCP rats, together with decreased TRPV1 expression in L4-6 DRG. Notably, continuous Metformin treatment reduced TGFβ1, TGFβRI and TRPV1 expression, and relieved mechanical allodynia of BCP rats in a long-term effect. In conclusion, these results illustrated that Metformin ameliorated bone cancer pain, and the downregulation of TGFβ1-TGFβRI-TRPV1 might be a potential mechanism of Metformin-mediated analgesia in BCP.
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Affiliation(s)
- Fang Zhou
- Center for Translational Medicine, Department of Oncology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou Medical College of Soochow University, Suzhou 215600, China
| | - He-Ya Qian
- Center for Translational Medicine, Department of Oncology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou Medical College of Soochow University, Suzhou 215600, China
| | - Ke Wang
- Department of Pain, Suzhou Wuzhong People's Hospital, Suzhou 215128, China
| | - Yong-Juan Gu
- Center for Translational Medicine, Department of Oncology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou Medical College of Soochow University, Suzhou 215600, China
| | - Pei-Lin Liu
- Center for Translational Medicine, Department of Oncology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou Medical College of Soochow University, Suzhou 215600, China
| | - Ling Zhang
- Center for Translational Medicine, Department of Oncology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou Medical College of Soochow University, Suzhou 215600, China
| | - Long Chen
- Center for Translational Medicine, Department of Oncology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou Medical College of Soochow University, Suzhou 215600, China
| | - Yu Song
- Center for Translational Medicine, Department of Oncology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou Medical College of Soochow University, Suzhou 215600, China
| | - Ya-Nan Chen
- Center for Translational Medicine, Department of Oncology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou Medical College of Soochow University, Suzhou 215600, China
| | - Hai-Long Zhang
- Center of Translational Medicine and Clinical Laboratory, The Fourth Affiliated Hospital of Soochow University, Medical Center of Soochow University, Suzhou Medical College of Soochow University, Suzhou 215123, China
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Gorbatenko VO, Goriainov SV, Babenko VA, Plotnikov EY, Chistyakov DV, Sergeeva MG. TLR3-mediated Astrocyte Responses in High and Normal Glucose Adaptation Differently Regulated by Metformin. Cell Biochem Biophys 2024:10.1007/s12013-024-01380-z. [PMID: 38918312 DOI: 10.1007/s12013-024-01380-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/19/2024] [Indexed: 06/27/2024]
Abstract
Toll-like receptors 3 (TLR3) are innate immune receptors expressed on a wide range of cell types, including glial cells. Inflammatory responses altered by hyperglycemia highlight the need to explore the molecular underpinnings of these changes in cellular models. Therefore, here we estimated TLR3-mediated response of astrocytes cultured at normal (NG, 5 mM) and high (HG, 22.5 mM) glucose concentrations for 48 h before stimulation with polyinosinic:polycytidylic acid Poly(I:C) (PIC) for 6 h. Seahorse Extracellular Flux Analyzer (Seahorse XFp) was used to estimate the extracellular acidification rate (ECAR) and oxygen consumption rate (OCR). Although adaptation to HG affected ECAR and OCR, the stimulation of cells with PIC had no effect on ECAR. PIC reduced maximal OCR, but this effect disappeared upon adaptation to HG. PIC-stimulated release of cytokines IL-1β, IL-10 was reduced, and that of IL-6 and iNOS was increased in the HG model. Adaptation to HG reduced PIC-stimulated synthesis of COX-derived oxylipins measured by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Adaptation to HG did not alter PIC-stimulated p38 activity, ERK mitogen-activated protein kinase, STAT3 and ROS production. Metformin exhibited anti-inflammatory activity, reducing PIC-stimulated synthesis of cytokines and oxylipins. Cell adaptation to high glucose concentration altered the sensitivity of astrocytes to TLR3 receptor activation, and the hypoglycemic drug metformin may exert anti-inflammatory effects under these conditions.
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Affiliation(s)
- Vladislav O Gorbatenko
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119234, Moscow, Russia
| | - Sergey V Goriainov
- Peoples' Friendship University of Russia (RUDN University), 117198, Moscow, Russia
| | - Valentina A Babenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992, Moscow, Russia
| | - Egor Y Plotnikov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992, Moscow, Russia
| | - Dmitry V Chistyakov
- Peoples' Friendship University of Russia (RUDN University), 117198, Moscow, Russia.
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992, Moscow, Russia.
| | - Marina G Sergeeva
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992, Moscow, Russia
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Bakry HM, Mansour NO, ElKhodary TR, Soliman MM. Efficacy of metformin in prevention of paclitaxel-induced peripheral neuropathy in breast cancer patients: a randomized controlled trial. Front Pharmacol 2023; 14:1181312. [PMID: 37583905 PMCID: PMC10424931 DOI: 10.3389/fphar.2023.1181312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 07/17/2023] [Indexed: 08/17/2023] Open
Abstract
Background: Paclitaxel-induced peripheral neuropathy (PN) is a serious clinical problem with no approved drug for prevention. This study aimed to examine the neuroprotective effect of metformin against paclitaxel-induced PN in breast cancer patients. Methods: Patients with confirmed breast cancer diagnosis who were planned to receive paclitaxel were randomized to receive either metformin or placebo. Both groups received the standard chemotherapy protocol for breast cancer. Patients started metformin/placebo 1 week before paclitaxel initiation and continued study interventions thereafter for nine consecutive weeks. The primary outcome was the incidence of development of grade two or more paclitaxel-induced sensory PN. The PN was graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE). Patients' quality of life (QoL) was assessed by the Functional Assessment of Cancer Therapy/Gynecologic Oncology Group-Neurotoxicity (FACTGOG-Ntx) subscale. Pain severity was measured by the Brief Pain Inventory Short Form (BPI-SF). Serum levels of nerve growth factor (NGF) and neurotensin (NT) were measured at baseline and at the end paclitaxel treatment. Results: A total of 73 patients (36 in the metformin arm and 37 in the control arm) were evaluated. The cumulative incidence of development of grade two or more PN was significantly lower in the metformin arm (14 (38.9%) than the control arm (28 (75.7%); p = 0.001). At the end of paclitaxel treatment, patients' QoL was significantly better in the metformin arm [median (IQR) FACTGOG-Ntx subscale of (24.0 (20.5-26.5)] compared to the control arm (21.0 (18.0-24.0); p = 0.003). The metformin arm showed lower "average" and "worst" pain scores than those detected in the control arm. At the end of the paclitaxel treatment, there was a significant difference in the median serum NGF levels between the two arms, favoring metformin (p < 0.05), while NT serum levels were deemed comparable between the two study arms (p = 0.09). Conclusion: The use of metformin in breast cancer patients offered a marked protection against paclitaxel-induced PN, which translated to better patient QoL. Clinical Trial Registration: https://classic.clinicaltrials.gov/ct2/show/NCT05351021, identifier NCT05351021.
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Affiliation(s)
- Hala M. Bakry
- Clinical Pharmacy and Pharmacy Practice Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Noha O. Mansour
- Clinical Pharmacy and Pharmacy Practice Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Tawfik R. ElKhodary
- Oncology Center, Medical Oncology Unit, Mansoura University, Mansoura, Egypt
| | - Moetaza M. Soliman
- Clinical Pharmacy and Pharmacy Practice Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
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Ji H, Dong H, Lan Y, Bi Y, Gu X, Han Y, Yang C, Cheng M, Gao J. Metformin attenuates fibroblast activation during pulmonary fibrosis by targeting S100A4 via AMPK-STAT3 axis. Front Pharmacol 2023; 14:1089812. [PMID: 36817136 PMCID: PMC9936158 DOI: 10.3389/fphar.2023.1089812] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 01/25/2023] [Indexed: 02/05/2023] Open
Abstract
Fibroblasts activation is a crucial process for development of fibrosis during idiopathic pulmonary fibrosis pathogenesis, and transforming growth factor (TGF)-β1 plays a key regulatory role in fibroblast activation. It has been reported that metformin (MET) alleviated bleomycin (BLM)-induced pulmonary fibrosis (PF) by regulating TGF-β1-induced fibroblasts activation, but the underlying mechanisms still deserve further investigations. In this study, MET blocked α-smooth muscle actin (α-SMA) accumulation in vivo accompanied with S100A4 expression and STAT3 phosphorylation inhibition, resulting in attenuating the progression of lung fibrosis after BLM administration. We determined that S100A4 plays critical roles in fibroblasts activation in vitro, evidenced by siRNA knockdown of S100A4 expression downregulated TGF-β1 induced α-SMA production in Human fetal lung fibroblast (HFL1) cells. Importantly, we found for the first time that the expression of S100A4 in fibroblasts was regulated by STAT3. Stattic, an effective small molecule inhibitor of STAT3 phosphorylation, reduced S100A4 level in TGF-β1- treated HFL1 cells accompanied with less α-SMA production. We further found that MET, which inhibits STAT3 phosphorylation by AMPK activation, also inhibits fibroblasts activation by targeting S100A4 in vitro. Together all these results, we conclude that S100A4 contributes to TGF-β1- induced pro-fibrogenic function in fibroblasts activation, and MET was able to protect against TGF-β1-induced fibroblasts activation and BLM-induced PF by down-regulating S100A4 expression through AMPK-STAT3 axis. These results provide a useful clue for a clinical strategy to prevent PF.
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Affiliation(s)
- Huimin Ji
- Pediatric Translational Medicine Institute, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China,The Second Affiliated Hospital, Dalian Medical University, Dalian, Liaoning, China
| | - Hongliang Dong
- Pediatric Translational Medicine Institute, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yuejiao Lan
- Pediatric Translational Medicine Institute, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China,Jilin Province People's Hospital, Changchun, Jilin, China
| | - Yuqian Bi
- Pediatric Translational Medicine Institute, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xuan Gu
- Pediatric Translational Medicine Institute, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China,3201 Hospital, Hanzhong, Shaanxi, China
| | - Yongyue Han
- Pediatric Translational Medicine Institute, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Chongyang Yang
- Pediatric Translational Medicine Institute, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Minghan Cheng
- Pediatric Translational Medicine Institute, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China,*Correspondence: Jian Gao, ; Minghan Cheng,
| | - Jian Gao
- Pediatric Translational Medicine Institute, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China,*Correspondence: Jian Gao, ; Minghan Cheng,
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5
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Gorbatenko VO, Goriainov SV, Babenko VA, Plotnikov EY, Sergeeva MG, Chistyakov DV. Anti-Inflammatory Properties of Metformin During Cultivation of Primary Rat Astrocytes in a Medium with High Glucose Concentration. BIOCHEMISTRY. BIOKHIMIIA 2022; 87:577-589. [PMID: 36154879 DOI: 10.1134/s000629792207001x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/10/2022] [Accepted: 05/10/2022] [Indexed: 06/16/2023]
Abstract
Investigation of the relationship between inflammation and energy metabolism is important for understanding biology of chronic noncommunicable diseases. Use of metformin, a drug for treatment of diabetes, is considered as a promising direction for treatment of neurodegenerative diseases and other neuropathologies with an inflammatory component. Astrocytes play an important role in the regulation of energy metabolism and neuroinflammation; therefore, we studied the effect of metformin on the cellular responses of primary rat astrocytes cultured in a medium with high glucose concentration (22.5 mM, 48-h incubation). Lipopolysaccharide (LPS) was used to stimulate inflammation. The effects of metformin were assessed by monitoring changes in the expression of proinflammatory cytokines and synthesis of oxylipins, assayed with ultra-high-performance liquid chromatography and tandem mass spectrometry (UPLC-MS/MS). Changes at the intracellular level were assessed by analyzing phosphorylation of ERK kinase and transcription factor STAT3, as well as enzymes mediating oxylipin synthesis, cyclooxygenase 1 and 2 (COX). It was found that, independent on glucose concentration, metformin reduced the LPS-stimulated release of cytokines IL-1β and IL-6, decreased activity of the transcription factor STAT3, ERK kinase, synthesis of the derivatives of the cyclooxygenase branch of metabolism of oxylipins and anandamide, and did not affect formation of ROS. The study of energy phenotype of the cells showed that metformin activated glycolysis and inhibited mitochondrial respiration and oxidative phosphorylation, independent on LPS stimulation and cell cultivation at high glucose concentration. Thus, it has been shown that metformin exhibits anti-inflammatory effects, and its effect on the synthesis of cytokines, prostaglandins, and other lipid mediators could determine beneficial effects of metformin in models of neuropathology.
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Affiliation(s)
- Vladislav O Gorbatenko
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, 119234, Russia
| | - Sergey V Goriainov
- Peoples' Friendship University of Russia (RUDN University), Moscow, 117198, Russia
| | - Valentina A Babenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119992, Russia
| | - Egor Y Plotnikov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119992, Russia
| | - Marina G Sergeeva
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119992, Russia
| | - Dmitry V Chistyakov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119992, Russia.
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6
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Curcumin and metformin synergistically modulate peripheral and central immune mechanisms of pain. Sci Rep 2022; 12:9713. [PMID: 35690654 PMCID: PMC9188603 DOI: 10.1038/s41598-022-13647-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 05/26/2022] [Indexed: 12/14/2022] Open
Abstract
Metformin is a well-tolerated antidiabetic drug and has recently been repurposed for numerous diseases, including pain. However, a higher dose of metformin is required for effective analgesia, which can potentiate its dose-dependent gastrointestinal side effects. Curcumin is a natural polyphenol and has beneficial therapeutic effects on pain. Curcumin has been used as an analgesic adjuvant with several analgesic drugs, allowing synergistic antinociceptive effects. Nevertheless, whether curcumin can exert synergistic analgesia with metformin is still unknown. In the present study, the nature of curcumin-metformin anti-inflammatory interaction was evaluated in in vitro using lipopolysaccharide-induced RAW 264.7 macrophage and BV-2 microglia cells. In both macrophage and microglia, curcumin effectively potentiates the anti-inflammatory effects of metformin, indicating potential synergistic effects in both peripheral and central pathways of pain. The nature of the interaction between curcumin and metformin was further recapitulated using a mouse model of formalin-induced pain. Coadministration of curcumin and metformin at a 1:1 fixed ratio of their ED50 doses significantly reduced the dose required to produce a 50% effect compared to the theoretically required dose in phase II of the formalin test with a combination index value of 0.24. Besides, the synergistic interaction does not appear to involve severe CNS side effects indicated by no motor alterations, no alterations in short-term and long-term locomotive behaviors, and the general well-being of mice. Our findings suggest that curcumin exerts synergistic anti-inflammation with metformin with no potential CNS adverse effects.
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7
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The Antidiabetic Drug Metformin Regulates Voltage-Gated Sodium Channel Na V1.7 via the Ubiquitin-Ligase NEDD4-2. eNeuro 2022; 9:ENEURO.0409-21.2022. [PMID: 35131865 PMCID: PMC8906783 DOI: 10.1523/eneuro.0409-21.2022] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 12/10/2021] [Accepted: 01/01/2022] [Indexed: 12/14/2022] Open
Abstract
The antidiabetic drug metformin has been shown to reduce pain hypersensitivity in preclinical models of chronic pain and in neuropathic pain in humans. Multiple intracellular pathways have been described as metformin targets. Among them, metformin is an activator of the adenosine 5′-monophosphate protein kinase that can in turn modulate the activity of the E3 ubiquitin ligase NEDD4-2 and thus post-translational expression of voltage-gated sodium channels (NaVs). In this study, we found that the bulk of the effect of metformin on Na1.7 is dependent on NEDD4-2. In HEK cells, the expression of NaV1.7 at the membrane fraction, obtained by a biotinylation approach, is only reduced by metformin when cotransfected with NEDD4-2. Similarly, in voltage-clamp recordings, metformin significantly reduced NaV1.7 current density when cotransfected with NEDD4-2. In mouse dorsal root ganglion (DRG) neurons, without changing the biophysical properties of NaV1.7, metformin significantly decreased NaV1.7 current densities, but not in Nedd4L knock-out mice (SNS-Nedd4L−/−). In addition, metformin induced a significant reduction in NEDD4-2 phosphorylation at the serine-328 residue in DRG neurons, an inhibitory phosphorylation site of NEDD4-2. In current-clamp recordings, metformin reduced the number of action potentials elicited by DRG neurons from Nedd4Lfl/fl, with a partial decrease also present in SNS-Nedd4L−/− mice, suggesting that metformin can also change neuronal excitability in an NEDD4-2-independent manner. We suggest that NEDD4-2 is a critical player for the effect of metformin on the excitability of nociceptive neurons; this action may contribute to the relief of neuropathic pain.
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8
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Ala M, Ala M. Metformin for Cardiovascular Protection, Inflammatory Bowel Disease, Osteoporosis, Periodontitis, Polycystic Ovarian Syndrome, Neurodegeneration, Cancer, Inflammation and Senescence: What Is Next? ACS Pharmacol Transl Sci 2021; 4:1747-1770. [PMID: 34927008 DOI: 10.1021/acsptsci.1c00167] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Indexed: 12/15/2022]
Abstract
Diabetes is accompanied by several complications. Higher prevalence of cancers, cardiovascular diseases, chronic kidney disease (CKD), obesity, osteoporosis, and neurodegenerative diseases has been reported among patients with diabetes. Metformin is the oldest oral antidiabetic drug and can improve coexisting complications of diabetes. Clinical trials and observational studies uncovered that metformin can remarkably prevent or alleviate cardiovascular diseases, obesity, polycystic ovarian syndrome (PCOS), osteoporosis, cancer, periodontitis, neuronal damage and neurodegenerative diseases, inflammation, inflammatory bowel disease (IBD), tuberculosis, and COVID-19. In addition, metformin has been proposed as an antiaging agent. Numerous mechanisms were shown to be involved in the protective effects of metformin. Metformin activates the LKB1/AMPK pathway to interact with several intracellular signaling pathways and molecular mechanisms. The drug modifies the biologic function of NF-κB, PI3K/AKT/mTOR, SIRT1/PGC-1α, NLRP3, ERK, P38 MAPK, Wnt/β-catenin, Nrf2, JNK, and other major molecules in the intracellular signaling network. It also regulates the expression of noncoding RNAs. Thereby, metformin can regulate metabolism, growth, proliferation, inflammation, tumorigenesis, and senescence. Additionally, metformin modulates immune response, autophagy, mitophagy, endoplasmic reticulum (ER) stress, and apoptosis and exerts epigenetic effects. Furthermore, metformin protects against oxidative stress and genomic instability, preserves telomere length, and prevents stem cell exhaustion. In this review, the protective effects of metformin on each disease will be discussed using the results of recent meta-analyses, clinical trials, and observational studies. Thereafter, it will be meticulously explained how metformin reprograms intracellular signaling pathways and alters molecular and cellular interactions to modify the clinical presentations of several diseases.
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Affiliation(s)
- Moein Ala
- School of Medicine, Tehran University of Medical Sciences (TUMS), 1416753955 Tehran, Iran
| | - Mahan Ala
- School of Dentistry, Golestan University of Medical Sciences (GUMS), 4814565589 Golestan, Iran
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9
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Qian HY, Zhou F, Wu R, Cao XJ, Zhu T, Yuan HD, Chen YN, Zhang PA. Metformin Attenuates Bone Cancer Pain by Reducing TRPV1 and ASIC3 Expression. Front Pharmacol 2021; 12:713944. [PMID: 34421611 PMCID: PMC8371459 DOI: 10.3389/fphar.2021.713944] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 07/14/2021] [Indexed: 11/13/2022] Open
Abstract
Bone cancer pain (BCP) is a common pathologic pain associated with destruction of bone and pathological reconstruction of nervous system. Current treatment strategies in clinical is inadequate and have unacceptable side effects due to the unclear pathology mechanism. In the present study, we showed that transplantation of Walker 256 cells aggravated mechanical allodynia of BCP rats (**p < 0.01 vs. Sham), and the expression of ASIC3 (Acid-sensitive ion channel 3) and TRPV1 was obviously enhanced in L4-6 dorsal root ganglions (DRGs) of BCP rats (**p < 0.01 vs. Sham). ASIC3 and TRPV1 was mainly expressed in CGRP and IB4 positive neurons of L4-6 DRGs. While, TRPV1 but not ASIC3 was markedly upregulated in L4-6 spinal dorsal horn (SDH) of BCP rats (**p < 0.01 vs. Sham). Importantly, intrathecal injection of CPZ (a TRPV1 inhibitor) or Amiloride (an ASICs antagonist) markedly increased the paw withdraw threshold (PWT) of BCP rats response to Von Frey filaments (**p < 0.01 vs. BCP + NS). What’s more, intraperitoneally injection of Metformin or Vinorelbine markedly elevated the PWT of BCP rats, but reduced the expression of TRPV1 and ASIC3 in L4-6 DRGs and decreased the TRPV1 expression in SDH (*p < 0.05, **p < 0.01 vs. BCP + NS). Collectively, these results suggest an effective analgesic effect of Metformin on mechanical allodynia of BCP rats, which may be mediated by the downregulation of ASIC3 and TRPV1.
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Affiliation(s)
- He-Ya Qian
- Department of Oncology, Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang, China.,Center for Translational Medicine, Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang, China
| | - Fang Zhou
- Department of Oncology, Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang, China
| | - Rui Wu
- Center for Translational Medicine, Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang, China
| | - Xiao-Jun Cao
- Center for Translational Medicine, Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang, China
| | - Tao Zhu
- Department of Laboratory, Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang, China
| | - Hao-Dong Yuan
- Department of Laboratory, Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang, China
| | - Ya-Nan Chen
- Department of Oncology, Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang, China
| | - Ping-An Zhang
- Center for Translational Medicine, Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang, China.,Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, China
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10
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Inyang KE, Folger JK, Laumet G. Can FDA-Approved Immunomodulatory Drugs be Repurposed/Repositioned to Alleviate Chronic Pain? J Neuroimmune Pharmacol 2021; 16:531-547. [PMID: 34041656 DOI: 10.1007/s11481-021-10000-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 05/18/2021] [Indexed: 12/11/2022]
Abstract
Pain is among the most widespread chronic health condition confronting society today and our inability to manage chronic pain contributes to the opioid abuse epidemic in America. The immune system is known to contribute to acute and chronic pain, but only limited therapeutic treatments such as non-steroid anti-inflammatory drugs have resulted from this knowledge. The last decade has shed light on neuro-immune interactions mediating the development, maintenance, and resolution of chronic pain. Here, we do not aim to perform a comprehensive review of all immune mechanisms involved in chronic pain, but to briefly review the contribution of the main cytokines and immune cells (macrophages, microglia, mast cells and T cells) to chronic pain. Given the urgent need to address the Pain crisis, we provocatively propose to repurpose/reposition FDA-approved immunomodulatory drugs for their potential to alleviate chronic pain. Repositioning or repurposing offers an attractive way to accelerate the arrival of new analgesics.
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Affiliation(s)
| | - Joseph K Folger
- Department of Physiology, Michigan State University, East Lansing, MI, USA
| | - Geoffroy Laumet
- Department of Physiology, Michigan State University, East Lansing, MI, USA.
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11
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Feng JH, Sim SM, Park JS, Hong JS, Suh HW. The changes of nociception and the signal molecules expression in the dorsal root ganglia and the spinal cord after cold water swimming stress in mice. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2021; 25:207-216. [PMID: 33859061 PMCID: PMC8050611 DOI: 10.4196/kjpp.2021.25.3.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/25/2021] [Accepted: 02/17/2021] [Indexed: 11/22/2022]
Abstract
Several studies have previously reported that exposure to stress provokes behavioral changes, including antinociception, in rodents. In the present study, we studied the effect of acute cold-water (4°C) swimming stress (CWSS) on nociception and the possible changes in several signal molecules in male ICR mice. Here, we show that 3 min of CWSS was sufficient to produce antinociception in tail-flick, hot-plate, von-Frey, writhing, and formalin-induced pain models. Significantly, CWSS strongly reduced nociceptive behavior in the first phase, but not in the second phase, of the formalin-induced pain model. We further examined some signal molecules' expressions in the dorsal root ganglia (DRG) and spinal cord to delineate the possible molecular mechanism involved in the antinociceptive effect under CWSS. CWSS reduced p-ERK, p-AMPKα1, p-AMPKα2, p-Tyk2, and p-STAT3 expression both in the spinal cord and DRG. However, the phosphorylation of mTOR was activated after CWSS in the spinal cord and DRG. Moreover, p-JNK and p-CREB activation were significantly increased by CWSS in the spinal cord, whereas CWSS alleviated JNK and CREB phosphorylation levels in DRG. Our results suggest that the antinociception induced by CWSS may be mediated by several molecules, such as ERK, JNK, CREB, AMPKα1, AMPKα2, mTOR, Tyk2, and STAT3 located in the spinal cord and DRG.
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Affiliation(s)
- Jing-Hui Feng
- Department of Pharmacology and Institute of Natural Medicine, College of Medicine, Hallym University, Chuncheon 24252, Korea
| | - Su-Min Sim
- Department of Pharmacology and Institute of Natural Medicine, College of Medicine, Hallym University, Chuncheon 24252, Korea
| | - Jung-Seok Park
- Department of Physical Education, Hallym University, Chuncheon 24252, Korea
| | - Jae-Seung Hong
- Department of Physical Education, Hallym University, Chuncheon 24252, Korea
| | - Hong-Won Suh
- Department of Pharmacology and Institute of Natural Medicine, College of Medicine, Hallym University, Chuncheon 24252, Korea
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12
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Kong C, Du J, Bu H, Huang C, Xu F, Ren H. LncRNA KCNA2-AS regulates spinal astrocyte activation through STAT3 to affect postherpetic neuralgia. Mol Med 2020; 26:113. [PMID: 33225882 PMCID: PMC7681985 DOI: 10.1186/s10020-020-00232-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 10/22/2020] [Indexed: 12/29/2022] Open
Abstract
Objectives Postherpetic neuralgia (PHN) is the most common complication of herpes zoster, but the mechanism of PHN is still unclear. Activation of spinal astrocytes is involved in PHN. Our study aims to explore whether lncRNA KCNA2 antisense RNA (KCNA2-AS) regulates spinal astrocytes in PHN through signal transducers and activators of transcription 3 (STAT3). Methods Varicella zoster virus (VZV)-infected CV-1 cells were injected into rats to construct a PHN model. Primary spinal cord astrocytes were activated using S-Nitrosoglutathione (GSNO). Glial fibrillary acidic protein (GFAP; marker of astrocyte activation), phosphorylated STAT3 (pSTAT3), and KCNA2-AS were analyzed by immunofluorescence and RNA fluorescence in situ hybridization. RNA pull-down and RNA immunoprecipitation were used to detect binding of KCNA2-AS to pSTAT3. Results KCNA2-AS was highly expressed in the spinal cord tissue of PHN model rats, and was positively correlated with GFAP expression. GFAP was significantly increased in GSNO-induced cells, but the knockdown of KCNA2-AS reversed this result. Meanwhile, pSTAT3 was significantly increased in GSNO-induced cells, but knockdown of KCNA2-AS reduced pSTAT3 within the nucleus while the total pSTAT3 did not change significantly. pSTAT3 bound to KCNA2-AS and this binding increased with GSNO treatment. Furthermore, knockdown of KCNA2-AS in PHN model rats relieved mechanical allodynia. Conclusion Down-regulation of KCNA2-AS alleviates PHN partly by reducing the translocation of pSTAT3 cytoplasm to the nucleus and then inhibiting the activation of spinal astrocytes.
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Affiliation(s)
- Cunlong Kong
- Center of Pain Management, Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
| | - Jie Du
- Outpatient and Emergency Department of West District Hospital, Children's Hospital Affiliated to Zhengzhou University, Zhengzhou, 450018, China
| | - Huilian Bu
- Center of Pain Management, Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Chen Huang
- Center of Pain Management, Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Fuxing Xu
- Center of Pain Management, Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Huan Ren
- Center of Pain Management, Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
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13
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Baeza-Flores GDC, Guzmán-Priego CG, Parra-Flores LI, Murbartián J, Torres-López JE, Granados-Soto V. Metformin: A Prospective Alternative for the Treatment of Chronic Pain. Front Pharmacol 2020; 11:558474. [PMID: 33178015 PMCID: PMC7538784 DOI: 10.3389/fphar.2020.558474] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 09/02/2020] [Indexed: 12/15/2022] Open
Abstract
Metformin (biguanide) is a drug widely used for the treatment of type 2 diabetes. This drug has been used for 60 years as a highly effective antihyperglycemic agent. The search for the mechanism of action of metformin has produced an enormous amount of research to explain its effects on gluconeogenesis, protein metabolism, fatty acid oxidation, oxidative stress, glucose uptake, autophagy and pain, among others. It was only up the end of the 1990s and beginning of this century that some of its mechanisms were revealed. Metformin induces its beneficial effects in diabetes through the activation of a master switch kinase named AMP-activated protein kinase (AMPK). Two upstream kinases account for the physiological activation of AMPK: liver kinase B1 and calcium/calmodulin-dependent protein kinase kinase 2. Once activated, AMPK inhibits the mechanistic target of rapamycin complex 1 (mTORC1), which in turn avoids the phosphorylation of p70 ribosomal protein S6 kinase 1 and phosphatidylinositol 3-kinase/protein kinase B signaling pathways and reduces cap-dependent translation initiation. Since metformin is a disease-modifying drug in type 2 diabetes, which reduces the mTORC1 signaling to induce its effects on neuronal plasticity, it was proposed that these mechanisms could also explain the antinociceptive effect of this drug in several models of chronic pain. These studies have highlighted the efficacy of this drug in chronic pain, such as that from neuropathy, insulin resistance, diabetic neuropathy, and fibromyalgia-type pain. Mounting evidence indicates that chronic pain may induce anxiety, depression and cognitive impairment in rodents and humans. Interestingly, metformin is able to reverse some of these consequences of pathological pain in rodents. The purpose of this review was to analyze the current evidence about the effects of metformin in chronic pain and three of its comorbidities (anxiety, depression and cognitive impairment).
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Affiliation(s)
- Guadalupe Del Carmen Baeza-Flores
- Laboratorio de Mecanismos de Dolor, División Académica de Ciencias de la Salud, Universidad Juárez Autónoma de Tabasco, Villahermosa, Mexico
| | - Crystell Guadalupe Guzmán-Priego
- Laboratorio de Mecanismos de Dolor, División Académica de Ciencias de la Salud, Universidad Juárez Autónoma de Tabasco, Villahermosa, Mexico
| | - Leonor Ivonne Parra-Flores
- Laboratorio de Mecanismos de Dolor, División Académica de Ciencias de la Salud, Universidad Juárez Autónoma de Tabasco, Villahermosa, Mexico
| | - Janet Murbartián
- Departamento de Farmacobiología, Cinvestav, South Campus, Mexico City, Mexico
| | - Jorge Elías Torres-López
- Laboratorio de Mecanismos de Dolor, División Académica de Ciencias de la Salud, Universidad Juárez Autónoma de Tabasco, Villahermosa, Mexico.,Departamento de Anestesiología, Hospital Regional de Alta Especialidad "Dr. Juan Graham Casasús", Villahermosa, Mexico
| | - Vinicio Granados-Soto
- Neurobiology of Pain Laboratory, Departamento de Farmacobiología, Cinvestav, South Campus, Mexico City, Mexico
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14
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Jin J, Chen N, Pan H, Xie W, Xu H, Lei S, Guo Z, Ding R, He Y, Gao J. Triclosan induces ROS-dependent cell death and autophagy in A375 melanoma cells. Oncol Lett 2020; 20:73. [PMID: 32863906 PMCID: PMC7436935 DOI: 10.3892/ol.2020.11934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 06/23/2020] [Indexed: 12/29/2022] Open
Abstract
Melanoma is a common type of cutaneous tumor, but current drug treatments do not satisfy clinical practice requirements. At present, mitochondrial uncoupling is an effective antitumor treatment. Triclosan, a common antimicrobial, also acts as a mitochondrial uncoupler. The aims of the present study were to investigate the effects of triclosan on melanoma cells and the underlying mechanisms. Mitochondrial membrane potential (MMP), mitochondrial morphology, mitochondrial reactive oxygen species (mito-ROS), intracellular superoxide anion and [Ca2+]i were measured using confocal microscopy. It was found that triclosan application was associated with decreased A375 cell viability in a dose- and time-dependent manner and these effects may have cell specificity. Furthermore, triclosan induced MMP depolarization, ATP content decrease, mito-ROS and [Ca2+]i level increases, excessive mitochondrial fission, AMP-activated protein kinase (AMPK) activation and STAT3 inhibition. Moreover, these aforementioned effects were reversed by acetylcysteine treatment. Triclosan acute treatment also induced mitochondrial swelling, which was reversed after AMPK-knockdown associated with [Ca2+]i overload. Cell death was caused by STAT3 inhibition but not AMPK activation. Moreover, triclosan induced autophagy via the ROS/AMPK/p62/microtubule-associated protein 1A/1B-light chain 3 (LC3) signaling pathway, which may serve a role in feedback protection. Collectively, the present results suggested that triclosan increased mito-ROS production in melanoma cells, following induced cell death via the STAT3/Bcl-2 pathway and autophagy via the AMPK/p62/LC3 pathway.
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Affiliation(s)
- Jing Jin
- Department of Urology, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314001, P.R. China
| | - Naiwen Chen
- Department of Urology, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314001, P.R. China.,Department of Surgety, The Second Clinical Medical College of Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Huan Pan
- Department of Central Laboratory, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314001, P.R. China
| | - Wenhua Xie
- Department of Urology, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314001, P.R. China
| | - Hong Xu
- Department of Urology, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314001, P.R. China.,Department of Surgety, The Second Clinical Medical College of Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Siyu Lei
- Department of Urology, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314001, P.R. China.,Department of Surgety, The Second Clinical Medical College of Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Zhiqin Guo
- Department of Pathology, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314001, P.R. China
| | - Renye Ding
- Department of Clinical Laboratory, The Affiliated Hospital of Jiaxing University, Jiaxing University, Jiaxing, Zhejiang 314001, P.R. China
| | - Yi He
- Department of Urology, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang 314001, P.R. China
| | - Jinlai Gao
- Department of Pharmacology, College of Medical, Jiaxing University, Jiaxing, Zhejiang 314001, P.R. China
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15
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Feng JH, Lee HJ, Suh HW. The Molecular Signatures of Acute-immobilization-induced Antinociception and Chronic-immobilization-induced Antinociceptive Tolerance. Exp Neurobiol 2019; 28:670-678. [PMID: 31902155 PMCID: PMC6946116 DOI: 10.5607/en.2019.28.6.670] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 11/22/2019] [Accepted: 11/26/2019] [Indexed: 12/15/2022] Open
Abstract
In the present study, the productions of antinociception induced by acute and chronic immobilization stress were compared in several animal pain models. In the acute immobilization stress model (up to 1 hr immobilization), the antinociception was produced in writhing, tail-flick, and formalin-induced pain models. In chronic immobilization stress experiment, the mouse was enforced into immobilization for 1 hr/day for 3, 7, or 14 days, then analgesic tests were performed. The antinociceptive effect was gradually reduced after 3, 7 and 14 days of immobilization stress. To delineate the molecular mechanism involved in the antinociceptive tolerance development in the chronic stress model, the expressions of some signal molecules in dorsal root ganglia (DRG), spinal cord, hippocampus, and the hypothalamus were observed in acute and chronic immobilization models. The COX-2 in DRG, p-JNK, p-AMPKα1, and p-mTOR in the spinal cord, p-P38 in the hippocampus, and p-AMPKα1 in the hypothalamus were elevated in acute immobilization stress, but were reduced gradually after 3, 7 and 14 days of immobilization stress. Our results suggest that the chronic immobilization stress causes development of tolerance to the antinociception induced by acute immobilization stress. In addition, the COX-2 in DRG, p-JNK, p-AMPKα1, and p-mTOR in the spinal cord, p-P38 in the hippocampus, and p-AMPKα1 in the hypothalamus may play important roles in the regulation of antinociception induced by acute immobilization stress and the tolerance development induced by chronic immobilization stress.
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Affiliation(s)
- Jing-Hui Feng
- Department of Pharmacology and Institute of Natural Medicine, College of Medicine, Hallym University, Chuncheon 24252, Korea
| | - Hee-Jung Lee
- Department of Pharmacology and Institute of Natural Medicine, College of Medicine, Hallym University, Chuncheon 24252, Korea
| | - Hong-Won Suh
- Department of Pharmacology and Institute of Natural Medicine, College of Medicine, Hallym University, Chuncheon 24252, Korea
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16
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Yang FR, Chen J, Yi H, Peng LY, Hu XL, Guo QL. MicroRNA-7a ameliorates neuropathic pain in a rat model of spinal nerve ligation via the neurofilament light polypeptide-dependent signal transducer and activator of transcription signaling pathway. Mol Pain 2019; 15:1744806919842464. [PMID: 30987515 PMCID: PMC6537231 DOI: 10.1177/1744806919842464] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Neuropathic pain is a type of chronic pain induced by either central or
peripheral nerve injury. MicroRNAs have been recently linked to many diseases,
including neuropathic pain. However, the role of miR-7a in neuropathic pain
still remains elusive. Thus, we aim to investigate the effects of miR-7a on
neuropathic pain based on the spinal nerve ligation rat model. After
establishment of spinal nerve ligation rat models, rats were infected with
adeno-associated virus-neurofilament light polypeptide, adeno-associated
virus-miR-7a or treated with metformin. The paw withdrawal threshold and paw
withdrawal latency were assessed afterward, and the expression of miR-7a and
neurofilament light polypeptide as well as their interaction was determined.
Subsequently, miR-7a was overexpressed or silenced in dorsal root ganglion cells
to investigate the role of miR-7a in neuropathic pain. Furthermore, the
regulatory effect of neurofilament light polypeptide on neuropathic pain was
detected using plasmid overexpressing neurofilament light polypeptide. Spinal
nerve ligation rat model exhibited upregulation of neurofilament light
polypeptide but downregulation of miR-7a. In addition, neurofilament light
polypeptide accumulation or miR-7a inhibition decreased paw withdrawal threshold
and paw withdrawal latency. Then, neurofilament light polypeptide accumulation
or miR-7a inhibition was observed to increase the phosphorylation level of
signal transducer and activator of transcription. miR-7a was found to directly
target neurofilament light polypeptide and downregulate neurofilament light
polypeptide. In addition, inhibiting the signal transducer and activator of
transcription signaling pathway was also revealed to increase paw withdrawal
threshold and paw withdrawal latency. Collectively, our study demonstrated that
miR-7a ameliorated neuropathic pain via blocking the signal transducer and
activator of transcription signaling pathway by repressing neurofilament light
polypeptide. These findings, if taken further, can be of important clinical
significance in treating patients with neuropathic pain.
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Affiliation(s)
- Feng-Rui Yang
- 1 Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, P.R. China.,2 Department of Anesthesiology, the First Affiliated Hospital of University of South China, Hengyang, P.R. China
| | - Ji Chen
- 3 Department of Endocrinology, the First Affiliated Hospital of University of South China, Hengyang, P.R. China
| | - Han Yi
- 2 Department of Anesthesiology, the First Affiliated Hospital of University of South China, Hengyang, P.R. China
| | - Liang-Yu Peng
- 2 Department of Anesthesiology, the First Affiliated Hospital of University of South China, Hengyang, P.R. China
| | - Xiao-Ling Hu
- 2 Department of Anesthesiology, the First Affiliated Hospital of University of South China, Hengyang, P.R. China
| | - Qu-Lian Guo
- 1 Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, P.R. China
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17
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Xiang HC, Lin LX, Hu XF, Zhu H, Li HP, Zhang RY, Hu L, Liu WT, Zhao YL, Shu Y, Pan HL, Li M. AMPK activation attenuates inflammatory pain through inhibiting NF-κB activation and IL-1β expression. J Neuroinflammation 2019; 16:34. [PMID: 30755236 PMCID: PMC6373126 DOI: 10.1186/s12974-019-1411-x] [Citation(s) in RCA: 128] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 01/22/2019] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Chronic pain is a major clinical problem with limited treatment options. Previous studies have demonstrated that activation of adenosine monophosphate-activated protein kinase (AMPK) can attenuate neuropathic pain. Inflammation/immune response at the site of complete Freund's adjuvant (CFA) injection is known to be a critical trigger of the pathological changes that produce inflammatory pain. However, whether activation of AMPK produces an analgesic effect through inhibiting the proinflammatory cytokines, including interleukin-1β (IL-1β), in inflammatory pain remains unknown. METHODS Inflammatory pain was induced in mice injected with CFA. The effects of AICAR (5-aminoimidazole-4-carboxyamide ribonucleoside, an AMPK activator), Compound C (an AMPK inhibitor), and IL-1ra (an IL-1 receptor antagonist) were tested at day 4 after CFA injection. Inflammatory pain was assessed with von Frey filaments and hot plate. Immunoblotting, hematoxylin and eosin (H&E) staining, and immunofluorescence were used to assess inflammation-induced biochemical changes. RESULTS The AMPK activator AICAR produced an analgesic effect and inhibited the level of proinflammatory cytokine IL-1β in the inflamed skin in mice. Moreover, activation of AMPK suppressed CFA-induced NF-κB p65 translocation from the cytosol to the nucleus in activated macrophages (CD68+ and CX3CR1+) of inflamed skin tissues. Subcutaneous injection of IL-1ra attenuated CFA-induced inflammatory pain. The AMPK inhibitor Compound C and AMPKα shRNA reversed the analgesic effect of AICAR and the effects of AICAR on IL-1β and NF-κB activation in inflamed skin tissues. CONCLUSIONS Our study provides new information that AMPK activation produces the analgesic effect by inhibiting NF-κB activation and reducing the expression of IL-1β in inflammatory pain.
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Affiliation(s)
- Hong-Chun Xiang
- Department of Neurobiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, People's Republic of China
| | - Li-Xue Lin
- Department of Neurobiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, People's Republic of China
| | - Xue-Fei Hu
- Department of Neurobiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, People's Republic of China
| | - He Zhu
- Department of Neurobiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, People's Republic of China
| | - Hong-Ping Li
- Department of Neurobiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, People's Republic of China
| | - Ru-Yue Zhang
- Department of Neurobiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, People's Republic of China
| | - Liang Hu
- Department of Pharmacology, School of Basic Medicine, Nanjing Medical University, Nanjing, 210000, China
| | - Wen-Tao Liu
- Department of Pharmacology, School of Basic Medicine, Nanjing Medical University, Nanjing, 210000, China
| | - Yi-Lin Zhao
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yang Shu
- Department of Central Laboratory, Affiliated Hospital of Jiangsu University, Zhenjiang, 212000, China
| | - Hui-Lin Pan
- Department of Anesthesiology and Perioperative Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Man Li
- Department of Neurobiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, People's Republic of China.
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18
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Abstract
AMPK activators increase P-body formation in DRG neurons in vitro. Peripheral nerve injury decreases P-bodies in mouse DRG neurons. Treatment with metformin restores normal P-body numbers in DRG neurons from nerve injured mice.
Increased mRNA translation in sensory neurons following peripheral nerve injury contributes to the induction and maintenance of chronic neuropathic pain. Metformin, a common anti-diabetic drug and an activator of AMP-activated protein kinase (AMPK), inhibits cap-dependent mRNA translation and reverses mechanical hypersensitivity caused by a neuropathic injury in both mice and rats. P-bodies are RNA granules that comprise sites for metabolizing mRNA through the process of de-capping followed by RNA decay. These RNA granules may also sequester mRNAs for storage. We have previously demonstrated that induction of cap-dependent translation in cultured trigeminal ganglion (TG) neurons decreases P-body formation and AMPK activators increase P-body formation. Here we examined the impact of AMPK activation on protein synthesis and P-body formation in vitro and in vivo on mouse dorsal root ganglion (DRG) neurons. We demonstrate that AMPK activators inhibit nascent protein synthesis and increase P-body formation in DRG neurons. We also demonstrate that mice with a spared-nerve injury (SNI) show decreased P-bodies in the DRG, consistent with increased mRNA translation resulting from injury. Metformin treatment normalizes this effect in SNI mice and increases P-body formation in sham animals. These findings indicate that P-bodies are dynamically regulated by nerve injury in vivo and this effect can be regulated via AMPK activation.
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19
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Inyang KE, Szabo-Pardi T, Wentworth E, McDougal TA, Dussor G, Burton MD, Price TJ. The antidiabetic drug metformin prevents and reverses neuropathic pain and spinal cord microglial activation in male but not female mice. Pharmacol Res 2018; 139:1-16. [PMID: 30391353 DOI: 10.1016/j.phrs.2018.10.027] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/16/2018] [Accepted: 10/28/2018] [Indexed: 12/25/2022]
Abstract
Metformin is a widely prescribed drug used in the treatment of type II diabetes. While the drug has many mechanisms of action, most of these converge on AMP activated protein kinase (AMPK), which metformin activates. AMPK is a multifunctional kinase that is a negative regulator of mechanistic target of rapamycin (mTOR) and mitogen activated protein kinase (MAPK) signaling. Activation of AMPK decreases the excitability of dorsal root ganglion neurons and AMPK activators are effective in reducing chronic pain in inflammatory, post-surgical and neuropathic rodent models. We have previously shown that metformin leads to an enduring resolution of neuropathic pain in the spared nerve injury (SNI) model in male mice and rats. The precise mechanism underlying this long-lasting effect is not known. We conducted experiments to investigate the effects of metformin on SNI-induced microglial activation, a process implicated in the maintenance of neuropathic pain that has recently been shown to be sexually dimorphic. We find that metformin is effective at inhibiting development of neuropathic pain when treatment is given around the time of injury and that metformin is likewise effective at reversing neuropathic mechanical hypersensitivity when treatment is initiation weeks after injury. This effect is linked to decreased Iba-1 staining in the dorsal horn, a marker of microglial activation. Importantly, these positive behavioral and microglia effects of metformin were only observed in male mice. We conclude that the neuropathic pain modifying effects of metformin are sex-specific supporting a differential role for microglial activation in male and female mice.
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Affiliation(s)
- Kufreobong E Inyang
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, United States
| | - Thomas Szabo-Pardi
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, United States
| | - Emma Wentworth
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, United States
| | - Timothy A McDougal
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, United States
| | - Gregory Dussor
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, United States
| | - Michael D Burton
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, United States.
| | - Theodore J Price
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, United States.
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