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Vigotsky AD, Cong O, Pinto CB, Barroso J, Perez J, Petersen KK, Arendt-Nielsen L, Hardt KD, Manning D, Apkarian AV, Branco P. Prognostic value of preoperative mechanical hyperalgesia and neuropathic pain qualities for postoperative pain after total knee replacement. Eur J Pain 2024. [PMID: 38850090 DOI: 10.1002/ejp.2295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/26/2024] [Accepted: 05/20/2024] [Indexed: 06/09/2024]
Abstract
BACKGROUND Total knee replacement (TKR) is the gold standard treatment for end-stage chronic osteoarthritis pain, yet many patients report chronic postoperative pain after TKR. The search for preoperative predictors for chronic postoperative pain following TKR has been studied with inconsistent findings. METHODS This study investigates the predictive value of quantitative sensory testing (QST) and PainDETECT for postoperative pain 3, 6 and 12 months post-TKR. We assessed preoperative and postoperative (3 and 6 months) QST measures in 77 patients with knee OA (KOA) and 41 healthy controls, along with neuropathic pain scores in patients (PainDETECT). QST parameters included pressure pain pressure threshold (PPT), pain tolerance threshold (PTT), conditioned pain modulation (CPM) and temporal summation (TS) using cuff algometry, alongside mechanical hyperalgesia and temporal summation to repeated pinprick stimulation. RESULTS Compared to healthy controls, KOA patients at baseline demonstrated hyperalgesia to pinprick stimulation at the medial knee undergoing TKR, and cuff pressure at the calf. Lower cuff algometry PTT and mechanical pinprick hyperalgesia were associated with preoperative KOA pain intensity. Moreover, preoperative pinprick pain hyperalgesia explained 25% of variance in pain intensity 12 months post-TKR and preoperative neuropathic pain scores also captured 30% and 20% of the variance in postoperative pain at 6 and 12 months respectively. A decrease in mechanical pinprick hyperalgesia from before surgery to 3 months after TKR was associated with lower postoperative pain at the 12 months post-TKR follow-up. CONCLUSION Our findings suggest that preoperative pinprick hyperalgesia and neuropathic-like pain symptoms show predictive value for the development of chronic post-TKR pain. SIGNIFICANCE STATEMENT This study's findings hold significant implications for chronic pain management in knee osteoarthritis patients, particularly those undergoing total knee replacement surgery (TKR). Mechanical hyperalgesia and neuropathic pain-like characteristics predict postoperative pain 1 year after TKR, emphasizing the importance of understanding pain phenotypes in OA for selecting appropriate pain management strategies. The normalization of hyperalgesia after surgery correlates with better long-term outcomes, further highlighting the therapeutic potential of addressing abnormal pain processing mechanisms pre- and post-TKR.
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Affiliation(s)
- Andrew D Vigotsky
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Biomedical Engineering and Statistics, Northwestern University, Evanston, Illinois, USA
| | - Olivia Cong
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Camila B Pinto
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Joana Barroso
- Department of Anesthesiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Jennifer Perez
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Kristian Kjaer Petersen
- Department of Health Science and Technology, Center for Neuroplasticity and Pain (CNAP), SMI, Faculty of Medicine, Aalborg University, Aalborg, Denmark
- Department of Material and Production, Center for Mathematical Modeling of Knee Osteoarthritis (MathKOA), Faculty of Engineering and Science, Aalborg University, Aalborg, Denmark
| | - Lars Arendt-Nielsen
- Department of Health Science and Technology, Center for Neuroplasticity and Pain (CNAP), SMI, Faculty of Medicine, Aalborg University, Aalborg, Denmark
- Department of Material and Production, Center for Mathematical Modeling of Knee Osteoarthritis (MathKOA), Faculty of Engineering and Science, Aalborg University, Aalborg, Denmark
- Department of Medical Gastroenterology, Mech-Sense, Aalborg University Hospital, Aalborg, Denmark
- Steno Diabetes Center North Denmark, Clinical Institute, Aalborg University Hospital, Aalborg, Denmark
| | - Kevin D Hardt
- Department of Orthopedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - David Manning
- Department of Orthopedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - A Vania Apkarian
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Anesthesiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Paulo Branco
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Anesthesiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
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Ventura-Martínez R, Ángeles-López GE, González-Ugalde D, Domínguez-Páez T, Navarrete-Vázquez G, Jaimez R, Déciga-Campos M. Antinociceptive effect of LMH-2, a new sigma-1 receptor antagonist analog of haloperidol, on the neuropathic pain of diabetic mice. Biomed Pharmacother 2024; 174:116524. [PMID: 38574622 DOI: 10.1016/j.biopha.2024.116524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 03/25/2024] [Accepted: 03/28/2024] [Indexed: 04/06/2024] Open
Abstract
This study evaluates the antiallodynic and antihyperalgesic effects of LMH-2, a new haloperidol (HAL) analog that acts as sigma-1 receptor (σ1 R) antagonist, in diabetic mice using a model of neuropathic pain induced by chronic hyperglycemia. Additionally, we compared its effects with those of HAL. Hyperglycemia was induced in mice by nicotinamide-streptozotocin administration (NA-STZ, 50-130 mg/kg). Four weeks later, mechanical allodynia was assessed using the up-down method, and hyperalgesia was evoked with formalin 0.5%. We evaluated antiallodynic and antihyperalgesic effects of LMH-2 (5.6-56.2 mg/kg), HAL (0.018-0.18 mg/kg) and gabapentin (GBP, 5.6-56.2 mg/kg). The results showed that LMH-2 had a more significant antiallodynic effect compared to HAL and GBP (90.4±8.7 vs 75.1±3.1 and 41.9±2.3%, respectively; P<0.05), as well as an antihyperalgesic effect (96.3±1.2 vs 86.9±7.41 and 86.9±4.8%, respectively; P<0.05). Moreover, the antiallodynic and antihyperalgesic effect of both LMH-2 and HAL were completely abolished by PRE-084 (σ1 R agonist); and partially by pramipexole (a D2-like receptor agonist). Finally, the effect of all treatments on the rotarod test, barra, open field and exploratory behaviors showed that LMH-2 did not alter the animals' balance or the exploratory behavior, unlike as HAL or GBP. The molecular docking included indicate that LMH-2 has lower affinity to the D2R than HAL. These results provide evidence that LMH-2 exerts its antinociceptive effects as a σ1 R antagonist without the adverse effects induced by HAL or GBP. Consequently, LMH-2 can be considered a good and safe strategy for treating neuropathic pain caused by hyperglycemia in patients with diabetes.
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Affiliation(s)
- Rosa Ventura-Martínez
- Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Av Universidad No. 3000, Col. Ciudad Universitaria, Alcaldía Coyoacán, Ciudad de México 04510, Mexico.
| | - Guadalupe Esther Ángeles-López
- Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Av Universidad No. 3000, Col. Ciudad Universitaria, Alcaldía Coyoacán, Ciudad de México 04510, Mexico
| | - Diana González-Ugalde
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional (IPN), Ciudad de México, Mexico
| | - Tania Domínguez-Páez
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional (IPN), Ciudad de México, Mexico
| | - Gabriel Navarrete-Vázquez
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos (UAEM), Cuernavaca, Morelos, Mexico
| | - Ruth Jaimez
- Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Av Universidad No. 3000, Col. Ciudad Universitaria, Alcaldía Coyoacán, Ciudad de México 04510, Mexico
| | - Myrna Déciga-Campos
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional (IPN), Ciudad de México, Mexico.
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Maximiano TKE, Carneiro JA, Fattori V, Verri WA. TRPV1: Receptor structure, activation, modulation and role in neuro-immune interactions and pain. Cell Calcium 2024; 119:102870. [PMID: 38531262 DOI: 10.1016/j.ceca.2024.102870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 03/06/2024] [Accepted: 03/06/2024] [Indexed: 03/28/2024]
Abstract
In the 1990s, the identification of a non-selective ion channel, especially responsive to capsaicin, revolutionized the studies of somatosensation and pain that were to follow. The TRPV1 channel is expressed mainly in neuronal cells, more specifically, in sensory neurons responsible for the perception of noxious stimuli. However, its presence has also been detected in other non-neuronal cells, such as immune cells, β- pancreatic cells, muscle cells and adipocytes. Activation of the channel occurs in response to a wide range of stimuli, such as noxious heat, low pH, gasses, toxins, endocannabinoids, lipid-derived endovanilloid, and chemical agents, such as capsaicin and resiniferatoxin. This activation results in an influx of cations through the channel pore, especially calcium. Intracellular calcium triggers different responses in sensory neurons. Dephosphorylation of the TRPV1 channel leads to its desensitization, which disrupts its function, while its phosphorylation increases the channel's sensitization and contributes to the channel's rehabilitation after desensitization. Kinases, phosphoinositides, and calmodulin are the main signaling pathways responsible for the channel's regulation. Thus, in this review we provide an overview of TRPV1 discovery, its tissue expression as well as on the mechanisms by which TRPV1 activation (directly or indirectly) induces pain in different disease models.
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Affiliation(s)
- Thaila Kawane Euflazio Maximiano
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Center of Biological Sciences, Londrina State University, Londrina, Paraná, Brazil
| | - Jessica Aparecida Carneiro
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Center of Biological Sciences, Londrina State University, Londrina, Paraná, Brazil
| | - Victor Fattori
- Vascular Biology Program, Department of Surgery, Boston Children's Hospital-Harvard Medical School, Karp Research Building, 300 Longwood Ave, 02115, Boston, Massachusetts, United States.
| | - Waldiceu A Verri
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Center of Biological Sciences, Londrina State University, Londrina, Paraná, Brazil.
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4
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Saini T, Mazumder PM. Current advancement in the preclinical models used for the assessment of diabetic neuropathy. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024; 397:2727-2745. [PMID: 37987794 DOI: 10.1007/s00210-023-02802-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 10/17/2023] [Indexed: 11/22/2023]
Abstract
Diabetic neuropathy is one of the prevalent and debilitating microvascular complications of diabetes mellitus, affecting a significant portion of the global population. Relational preclinical animal models are essential to understand its pathophysiology and develop effective treatments. This abstract provides an overview of current knowledge and advancements in such models. Various animal models have been developed to mimic the multifaceted aspects of human diabetic neuropathy, including both type 1 and type 2 diabetes. These models involve rodents (rats and mice) and larger animals like rabbits and dogs. Induction of diabetic neuropathy in these models is achieved through chemical, genetic, or dietary interventions, such as diabetogenic agents, genetic modifications, or high-fat diets. Preclinical animal models have greatly contributed to studying the intricate molecular and cellular mechanisms underlying diabetic neuropathy. They have shed light on hyperglycemia-induced oxidative stress, neuroinflammation, mitochondrial dysfunction, and altered neurotrophic factor signaling. Additionally, these models have allowed for the investigation of morphological changes, functional alterations, and behavioral manifestations associated with diabetic neuropathy. These models have also been crucial for evaluating the efficacy and safety of potential therapeutic interventions. Novel pharmacological agents, gene therapies, stem cell-based approaches, exercise, dietary modifications, and neurostimulation techniques have been tested using these models. However, limitations and challenges remain, including physiological differences between humans and animals, complex neuropathy phenotypes, and the need for translational validation. In conclusion, preclinical animal models have played a vital role in advancing our understanding and management of diabetic neuropathy. They have enhanced our knowledge of disease mechanisms, facilitated the development of novel treatments, and provided a platform for translational research. Ongoing efforts to refine and validate these models are crucial for future treatment developments for this debilitating condition.
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Affiliation(s)
- Tanishk Saini
- Department of Pharmaceutical Sciences & Technology, Birla Institute of Technology, Mesra, 835215, Ranchi, India
| | - Papiya Mitra Mazumder
- Department of Pharmaceutical Sciences & Technology, Birla Institute of Technology, Mesra, 835215, Ranchi, India.
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5
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Zhang C, Gu L, Xie H, Liu Y, Huang P, Zhang J, Luo D, Zhang J. Glucose transport, transporters and metabolism in diabetic retinopathy. Biochim Biophys Acta Mol Basis Dis 2024; 1870:166995. [PMID: 38142757 DOI: 10.1016/j.bbadis.2023.166995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 12/02/2023] [Accepted: 12/18/2023] [Indexed: 12/26/2023]
Abstract
Diabetic retinopathy (DR) is the most common reason for blindness in working-age individuals globally. Prolonged high blood glucose is a main causative factor for DR development, and glucose transport is prerequisite for the disturbances in DR caused by hyperglycemia. Glucose transport is mediated by its transporters, including the facilitated transporters (glucose transporter, GLUTs), the "active" glucose transporters (sodium-dependent glucose transporters, SGLTs), and the SLC50 family of uniporters (sugars will eventually be exported transporters, SWEETs). Glucose transport across the blood-retinal barrier (BRB) is crucial for nourishing the neuronal retina in the context of retinal physiology. This physiological process primarily relies on GLUTs and SGLTs, which mediate the glucose transportation across both the cell membrane of retinal capillary endothelial cells and the retinal pigment epithelium (RPE). Under diabetic conditions, increased accumulation of extracellular glucose enhances the retinal cellular glucose uptake and metabolism via both glycolysis and glycolytic side branches, which activates several biochemical pathways, including the protein kinase C (PKC), advanced glycation end-products (AGEs), polyol pathway and hexosamine biosynthetic pathway (HBP). These activated biochemical pathways further increase the production of reactive oxygen species (ROS), leading to oxidative stress and activation of Poly (ADP-ribose) polymerase (PARP). The activated PARP further affects all the cellular components in the retina, and finally resulting in microangiopathy, neurodegeneration and low-to-moderate grade inflammation in DR. This review aims to discuss the changes of glucose transport, glucose transporters, as well as its metabolism in DR, which influences the retinal neurovascular unit (NVU) and implies the possible therapeutic strategies for treating DR.
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Affiliation(s)
- Chaoyang Zhang
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China; National Clinical Research Center for Eye Diseases; Shanghai Clinical Research Center for Eye Diseases; Shanghai Key Clinical Specialty; Shanghai Key Laboratory of Ocular Fundus Diseases; Shanghai Engineering Center for Visual Science and Photomedicine; Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai Eye Research Institute, Shanghai, China.
| | - Limin Gu
- Department of Ophthalmology, Shanghai Aier Eye Hospital, Shanghai, China.
| | - Hai Xie
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China; National Clinical Research Center for Eye Diseases; Shanghai Clinical Research Center for Eye Diseases; Shanghai Key Clinical Specialty; Shanghai Key Laboratory of Ocular Fundus Diseases; Shanghai Engineering Center for Visual Science and Photomedicine; Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai Eye Research Institute, Shanghai, China.
| | - Yan Liu
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China; National Clinical Research Center for Eye Diseases; Shanghai Clinical Research Center for Eye Diseases; Shanghai Key Clinical Specialty; Shanghai Key Laboratory of Ocular Fundus Diseases; Shanghai Engineering Center for Visual Science and Photomedicine; Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai Eye Research Institute, Shanghai, China.
| | - Peirong Huang
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China; National Clinical Research Center for Eye Diseases; Shanghai Clinical Research Center for Eye Diseases; Shanghai Key Clinical Specialty; Shanghai Key Laboratory of Ocular Fundus Diseases; Shanghai Engineering Center for Visual Science and Photomedicine; Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai Eye Research Institute, Shanghai, China.
| | - Jingting Zhang
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China; National Clinical Research Center for Eye Diseases; Shanghai Clinical Research Center for Eye Diseases; Shanghai Key Clinical Specialty; Shanghai Key Laboratory of Ocular Fundus Diseases; Shanghai Engineering Center for Visual Science and Photomedicine; Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai Eye Research Institute, Shanghai, China.
| | - Dawei Luo
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China; National Clinical Research Center for Eye Diseases; Shanghai Clinical Research Center for Eye Diseases; Shanghai Key Clinical Specialty; Shanghai Key Laboratory of Ocular Fundus Diseases; Shanghai Engineering Center for Visual Science and Photomedicine; Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai Eye Research Institute, Shanghai, China.
| | - Jingfa Zhang
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China; National Clinical Research Center for Eye Diseases; Shanghai Clinical Research Center for Eye Diseases; Shanghai Key Clinical Specialty; Shanghai Key Laboratory of Ocular Fundus Diseases; Shanghai Engineering Center for Visual Science and Photomedicine; Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai Eye Research Institute, Shanghai, China.
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Karimi SA, Zahra FT, Martin LJ. IUPHAR review: Navigating the role of preclinical models in pain research. Pharmacol Res 2024; 200:107073. [PMID: 38232910 DOI: 10.1016/j.phrs.2024.107073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/09/2024] [Accepted: 01/11/2024] [Indexed: 01/19/2024]
Abstract
Chronic pain is a complex and challenging medical condition that affects millions of people worldwide. Understanding the underlying mechanisms of chronic pain is a key goal of preclinical pain research so that more effective treatment strategies can be developed. In this review, we explore nociception, pain, and the multifaceted factors that lead to chronic pain by focusing on preclinical models. We provide a detailed look into inflammatory and neuropathic pain models and discuss the most used animal models for studying the mechanisms behind these conditions. Additionally, we emphasize the vital role of these preclinical models in developing new pain-relief drugs, focusing on biologics and the therapeutic potential of NMDA and cannabinoid receptor antagonists. We also discuss the challenges of TRPV1 modulation for pain treatment, the clinical failures of neurokinin (NK)- 1 receptor antagonists, and the partial success story of Ziconotide to provide valuable lessons for preclinical pain models. Finally, we highlight the overall success and limitations of current treatments for chronic pain while providing critical insights into the development of more effective therapies to alleviate the burden of chronic pain.
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Affiliation(s)
- Seyed Asaad Karimi
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada
| | - Fatama Tuz Zahra
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada
| | - Loren J Martin
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada; Department of Cell and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada.
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7
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Vigotsky AD, Cong O, Pinto CB, Barroso J, Perez J, Petersen KK, Arendt-Nielsen L, Hardt K, Manning D, Apkarian AV, Branco P. Mechanical hyperalgesia and neuropathic pain qualities impart risk for chronic postoperative pain after total knee replacement. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.01.16.24301372. [PMID: 38293074 PMCID: PMC10827245 DOI: 10.1101/2024.01.16.24301372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Total knee replacement (TKR) is the gold-standard treatment for end-stage chronic osteoarthritis pain, yet many patients report chronic postoperative pain after TKR. The search for preoperative predictors for chronic postoperative pain following TKR has been studied with inconsistent findings. This study investigates the predictive value of quantitative sensory testing (QST) and PainDETECT for postoperative pain 3, 6, and 12 months post-TKR. We assessed baseline and postoperative (3- and 6-months) QST measures in 77 patients with knee OA (KOA) and 41 healthy controls, along with neuropathic pain scores in patients (PainDETECT). QST parameters included pressure pain pressure threshold (PPT), pain tolerance threshold (PTT), conditioned pain modulation (CPM), and temporal summation (TS) using cuff algometry, alongside mechanical hyperalgesia, and mechanical temporal summation to repeated pinprick stimulation. Compared to healthy controls, KOA patients at baseline demonstrated hyperalgesia to pinprick stimulation at the medial OA-affected knee and cuff pressure on the ipsilateral calf. Lower cuff algometry PTT and mechanical pinprick hyperalgesia were associated with baseline KOA pain intensity. Moreover, baseline pinprick pain hyperalgesia explained 25% of variance in pain intensity 12 months post-TKR and preoperative neuropathic pain scores also captured 30% and 20% of the variance in postoperative pain at 6- and 12-months, respectively. A decrease in mechanical pinprick hyperalgesia from before surgery to 3 months after TKR was associated with lower postoperative pain at the 12 months post-TKR follow-up, and vice-versa. Our findings suggest that preoperative pinprick hyperalgesia and PainDETECT neuropathic-like pain symptoms show predictive value for the development of chronic post-TKR pain.
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Affiliation(s)
- Andrew D. Vigotsky
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
- Departments of Biomedical Engineering and Statistics, Northwestern University, Evanston, IL. 60208, USA
| | - Olivia Cong
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
| | - Camila B Pinto
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
| | - Joana Barroso
- Department of Anesthesiology, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
| | - Jennifer Perez
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
| | - Kristian Kjaer Petersen
- Center for Neuroplasticity and Pain (CNAP), SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark
- Center for Mathematical Modeling of Knee Osteoarthritis (MathKOA), Department of Material and Production, Faculty of Engineering and Science, Aalborg University, Aalborg, Denmark
| | - Lars Arendt-Nielsen
- Center for Neuroplasticity and Pain (CNAP), SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark
- Center for Mathematical Modeling of Knee Osteoarthritis (MathKOA), Department of Material and Production, Faculty of Engineering and Science, Aalborg University, Aalborg, Denmark
- Department of Medical Gastroenterology, Mech-Sense, Aalborg University Hospital, Aalborg, Denmark
- Steno Diabetes Center North Denmark, Clinical Institute, Aalborg University Hospital, Aalborg, Denmark
| | - Kevin Hardt
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine. Chicago, IL. 60611, USA
| | - David Manning
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine. Chicago, IL. 60611, USA
| | - A. Vania Apkarian
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
- Department of Anesthesiology, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
| | - Paulo Branco
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
- Department of Anesthesiology, Northwestern University Feinberg School of Medicine. Chicago, IL. 60610, USA
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Hashim M, Badruddeen, Akhtar J, Khan MI, Ahmad M, Islam A, Ahmad A. Diabetic Neuropathy: An Overview of Molecular Pathways and Protective Mechanisms of Phytobioactives. Endocr Metab Immune Disord Drug Targets 2024; 24:758-776. [PMID: 37867264 DOI: 10.2174/0118715303266444231008143430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/31/2023] [Accepted: 08/25/2023] [Indexed: 10/24/2023]
Abstract
Diabetic neuropathy (DN) is a common and debilitating complication of diabetes mellitus that affects the peripheral nerves and causes pain, numbness, and impaired function. The pathogenesis of DN involves multiple molecular mechanisms, such as oxidative stress, inflammation, and pathways of advanced glycation end products, polyol, hexosamine, and protein kinase C. Phytochemicals are natural compounds derived from plants that have various biological activities and therapeutic potential. Flavonoids, terpenes, alkaloids, stilbenes, and tannins are some of the phytochemicals that have been identified as having protective potential for diabetic neuropathy. These compounds can modulate various cellular pathways involved in the development and progression of neuropathy, including reducing oxidative stress and inflammation and promoting nerve growth and repair. In this review, the current evidence on the effects of phytochemicals on DN by focusing on five major classes, flavonoids, terpenes, alkaloids, stilbenes, and tannins, are summarized. This compilation also discusses the possible molecular targets of numerous pathways of DN that these phytochemicals modulate. These phytochemicals may offer a promising alternative or complementary approach to conventional drugs for DN management by modulating multiple pathological pathways and restoring nerve function.
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Affiliation(s)
- Mohd Hashim
- Faculty of Pharmacy, Integral University, Lucknow, Uttar Pradesh, India
| | - Badruddeen
- Faculty of Pharmacy, Integral University, Lucknow, Uttar Pradesh, India
| | - Juber Akhtar
- Faculty of Pharmacy, Integral University, Lucknow, Uttar Pradesh, India
| | | | - Mohammad Ahmad
- Faculty of Pharmacy, Integral University, Lucknow, Uttar Pradesh, India
| | - Anas Islam
- Faculty of Pharmacy, Integral University, Lucknow, Uttar Pradesh, India
| | - Asad Ahmad
- Faculty of Pharmacy, Integral University, Lucknow, Uttar Pradesh, India
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9
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Batten L, Sathyapalan T, Palmer TM. Molecular Mechanisms Linking Diabetes with Increased Risk of Thrombosis. Int J Mol Sci 2023; 24:17465. [PMID: 38139295 PMCID: PMC10744197 DOI: 10.3390/ijms242417465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/04/2023] [Accepted: 12/10/2023] [Indexed: 12/24/2023] Open
Abstract
This review will provide an overview of what is currently known about mechanisms linking poor glycaemic control with increased thrombotic risk. The leading causes of death in people with diabetes are strokes and cardiovascular disease. Significant morbidity is associated with an increased risk of thrombosis, resulting in myocardial infarction, ischaemic stroke, and peripheral vascular disease, along with the sequelae of these events, including loss of functional ability, heart failure, and amputations. While the increased platelet activity, pro-coagulability, and endothelial dysfunction directly impact this risk, the molecular mechanisms linking poor glycaemic control with increased thrombotic risk remain unclear. This review highlights the complex mechanisms underlying thrombosis prevalence in individuals with diabetes and hyperglycaemia. Post-translational modifications, such as O-GlcNAcylation, play a crucial role in controlling protein function in diabetes. However, the role of O-GlcNAcylation remains poorly understood due to its intricate regulation and the potential involvement of multiple variables. Further research is needed to determine the precise impact of O-GlcNAcylation on specific disease processes.
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Affiliation(s)
- Lucy Batten
- Biomedical Institute for Multimorbidity, Centre for Biomedicine, Hull York Medical School, University of Hull, Hull HU6 7RX, UK;
- Clinical Sciences Centre, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
| | - Thozhukat Sathyapalan
- Clinical Sciences Centre, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
| | - Timothy M. Palmer
- Biomedical Institute for Multimorbidity, Centre for Biomedicine, Hull York Medical School, University of Hull, Hull HU6 7RX, UK;
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10
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Solanki N, Bhavsar S. Neuroprotective effects of Bauhinia variegata in ameliorating diabetic neuropathy and neurodegeneration. Am J Transl Res 2023; 15:6148-6158. [PMID: 37969205 PMCID: PMC10641339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 09/27/2023] [Indexed: 11/17/2023]
Abstract
INTRODUCTION In diabetic neuropathy with neurodegeneration (DNN), a serious diabetes consequence, extreme hyperglycemia destroys neurons in the brain and limbs. The main therapies for this condition are glucose control and pain management. Phytopharmacology is thought to be more successful in addressing the pain and blood sugar management issues associated with DNN. The objective of this study was to investigate how Bauhinia variegata (BV) could offer protection against streptozotocin (STZ)-induced diabetic neuropathy. METHODOLOGY STZ-associated DNN was induced in rats, and these diabetic rats were treated with BV at 200 mg/kg and 400 mg/kg doses for 28 days. Blood glucose (BG), serum nitrite, lipid peroxidation, antioxidants, C-reactive protein, behavioral, and histopathological parameters were assessed. RESULTS BV dramatically reduced BG and HbA1c levels in diabetic rats, according to the findings. The levels of superoxide dismutase and catalase both rose significantly. Both lipid peroxidation and serum nitrite levels were drastically decreased with BV treatment. In this study, it was found that BV has anti-hyperglycemic and anti-inflammatory effects on DNN. This was shown by a significant drop in C-reactive protein in diabetic rats, which was a key factor in diabetic neuropathy. Thermal hyperalgesia was significantly alleviated after BV therapy, and diabetic rats' pain thresholds improved. CONCLUSION Present study concluded that BV treatment has excellent glycemic control, a high antioxidant status, and relevant pain-relieving potential in diabetic neuropathy with neurodegeneration by reversing thermal hyperalgesia and decreasing hypeglycemia in diabetic rats.
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Affiliation(s)
- Nilay Solanki
- Department of Pharmacology, Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology (CHARUSAT), CHARUSAT CampusChanga 388421, Gujarat, India
| | - Shailesh Bhavsar
- Department of Veterinary Pharmacology and Toxicology, Kamdhenu UniversityAnand, Gujarat, India
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Ivasiuk A, Matvieienko M, Kononenko NI, Duzhyy DE, Korogod SM, Voitenko N, Belan P. Diabetes-Induced Amplification of Nociceptive DRG Neuron Output by Upregulation of Somatic T-Type Ca 2+ Channels. Biomolecules 2023; 13:1320. [PMID: 37759720 PMCID: PMC10526307 DOI: 10.3390/biom13091320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 08/23/2023] [Accepted: 08/23/2023] [Indexed: 09/29/2023] Open
Abstract
The development of pain symptoms in peripheral diabetic neuropathy (PDN) is associated with the upregulation of T-type Ca2+ channels (T-channels) in the soma of nociceptive DRG neurons. Moreover, a block of these channels in DRG neurons effectively reversed mechanical and thermal hyperalgesia in animal diabetic models, indicating that T-channel functioning in these neurons is causally linked to PDN. However, no particular mechanisms relating the upregulation of T-channels in the soma of nociceptive DRG neurons to the pathological pain processing in PDN have been suggested. Here we have electrophysiologically identified voltage-gated currents expressed in nociceptive DRG neurons and developed a computation model of the neurons, including peripheral and central axons. Simulations showed substantially stronger sensitivity of neuronal excitability to diabetes-induced T-channel upregulation at the normal body temperature compared to the ambient one. We also found that upregulation of somatic T-channels, observed in these neurons under diabetic conditions, amplifies a single action potential invading the soma from the periphery into a burst of multiple action potentials further propagated to the end of the central axon. We have concluded that the somatic T-channel-dependent amplification of the peripheral nociceptive input to the spinal cord demonstrated in this work may underlie abnormal nociception at different stages of diabetes development.
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Affiliation(s)
- Arsentii Ivasiuk
- Department of Molecular Biophysics, Bogomoletz Institute of Physiology of NAS of Ukraine, 01024 Kyiv, Ukraine; (A.I.); (M.M.); (N.I.K.); (S.M.K.)
| | - Maksym Matvieienko
- Department of Molecular Biophysics, Bogomoletz Institute of Physiology of NAS of Ukraine, 01024 Kyiv, Ukraine; (A.I.); (M.M.); (N.I.K.); (S.M.K.)
| | - Nikolai I. Kononenko
- Department of Molecular Biophysics, Bogomoletz Institute of Physiology of NAS of Ukraine, 01024 Kyiv, Ukraine; (A.I.); (M.M.); (N.I.K.); (S.M.K.)
| | - Dmytro E. Duzhyy
- Department of Sensory Signaling, Bogomoletz Institute of Physiology of NAS of Ukraine, 01024 Kyiv, Ukraine;
| | - Sergiy M. Korogod
- Department of Molecular Biophysics, Bogomoletz Institute of Physiology of NAS of Ukraine, 01024 Kyiv, Ukraine; (A.I.); (M.M.); (N.I.K.); (S.M.K.)
| | - Nana Voitenko
- Department of Biomedicine and Neuroscience, Kyiv Academic University of NAS of Ukraine, 03142 Kyiv, Ukraine
- Research Center, Dobrobut Academy Medical School, 03022 Kyiv, Ukraine
| | - Pavel Belan
- Department of Molecular Biophysics, Bogomoletz Institute of Physiology of NAS of Ukraine, 01024 Kyiv, Ukraine; (A.I.); (M.M.); (N.I.K.); (S.M.K.)
- Department of Biomedicine and Neuroscience, Kyiv Academic University of NAS of Ukraine, 03142 Kyiv, Ukraine
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Alkholifi FK, Aodah AH, Foudah AI, Alam A. Exploring the Therapeutic Potential of Berberine and Tocopherol in Managing Diabetic Neuropathy: A Comprehensive Approach towards Alleviating Chronic Neuropathic Pain. Biomedicines 2023; 11:1726. [PMID: 37371821 DOI: 10.3390/biomedicines11061726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 06/12/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023] Open
Abstract
Diabetic neuropathy (DN) causes sensory dysfunction, such as numbness, tingling, or burning sensations. Traditional medication may not ease pain and discomfort, but natural remedies such as Berberine (BR) and vitamin E or Tocopherol (TOC) have therapeutic potential to reduce inflammation while improving nerve function. Novel substances offer a more potent alternative method for managing severe chronic neuropathic pain that does not react to standard drug therapy by targeting various pathways that regulate it. Rats with diabetic control received oral doses of BR + TOC that showed significant changes in serum insulin levels compared to DN controls after 90 days, suggesting a decrease in sensitivity to painful stimuli partly by modulating the oxidative stress of the inflammatory pathway such as TNF-α suppression or stimulation of TNF-α depending on the amount of dose consumed by them. NF-kB also played its role here. Administering doses of BR and TOC reduced heightened levels of NF-kB and AGEs, effectively counteracting inflammation-targeted key factors in diabetes, promising possibilities for the benefits of these molecules revealed through in vivo investigation. In summary, treating neuropathy pain with a more comprehensive and organic approach can involve harnessing the powerful capabilities of BR and TOC. These compounds have been found to not only considerably decrease inflammation but also provide effective nerve protection while enhancing overall nerve function. With their multifunctional impacts on various neuropathic pain pathways in the body, these naturally occurring substances offer an exciting possibility for those who encounter high levels of neuropathic distress that do not respond well to conventional medication-centred therapies.
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Affiliation(s)
- Faisal K Alkholifi
- Department of Pharmacology & Toxicology, College of Pharmacy, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Alhussain H Aodah
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Ahmed I Foudah
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Aftab Alam
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
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Kalkan ÖF, Aktaş O, Sürmeneli YE, Alver A, Özcan M, Şahin Z. Does irisin has neuroprotective effect against diabetes induced neuropathy in male rats? Arch Physiol Biochem 2023; 129:439-448. [PMID: 33141621 DOI: 10.1080/13813455.2020.1835985] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We aimed to investigate the contribution of irisin in the neuroprotective process of exercise training in diabetic rats. Serum irisin levels, thermal and mechanical pain thresholds and intracellular calcium ([Ca2+]i) levels in sensory neurons were measured at different time intervals during the eight weeks of exercise sessions for the control, non-exercise diabetics (3 groups) and exercise performing (low and high intensity groups) diabetic rats (n = 7-10 for all groups). Non-exercise diabetic groups were treated with irisin in different doses (1, 10 and 20 µg/kg respectively). Recovered pain thresholds at the end of the exercise sessions (p < .05), higher serum irisin levels that compared to control and diabetics (p < .05) and insignificant mean [Ca2+]i peak amplitudes in sensory neurons (p > .05) obtained from experiments. Furthermore, irisin injection decreased the thermal pain threshold of diabetics only at 60th minutes (p < .05). Irisin may have a role in the neuroprotective effect of exercise training.
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Affiliation(s)
- Ömer Faruk Kalkan
- Faculty of Medicine, Department of Physiology, Karadeniz Technical University, Trabzon, Turkey
| | - Osman Aktaş
- Faculty of Medicine, Department of Physiology, Karadeniz Technical University, Trabzon, Turkey
| | - Yunus Emre Sürmeneli
- Faculty of Medicine, Department of Physiology, University of Health Sciences, Istanbul, Turkey
| | - Ahmet Alver
- Faculty of Medicine, Department of Biochemistry, Karadeniz Technical University, Trabzon, Turkey
| | - Mete Özcan
- Faculty of Medicine, Department of Biophysics, Firat University, Elazig, Turkey
| | - Zafer Şahin
- Faculty of Medicine, Department of Physiology, Karadeniz Technical University, Trabzon, Turkey
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Yang G, Shi J. miRNA-130a-3p targets sphingosine-1-phosphate receptor 1 to activate the microglial and astrocytes and to promote neural injury under the high glucose condition. Open Med (Wars) 2022; 17:2117-2129. [PMID: 36582210 PMCID: PMC9768207 DOI: 10.1515/med-2022-0565] [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: 12/06/2021] [Revised: 08/09/2022] [Accepted: 08/15/2022] [Indexed: 12/24/2022] Open
Abstract
As a common complication of diabetes, diabetic pain neuropathy (DPN) is caused by neuron intrinsic and extrinsic factors. Neuron intrinsic factors include neuronal apoptosis and oxidative stress, while extrinsic factors are associated with glial activation. The present study was performed to reveal the functions of miR-130a-3p in apoptosis and oxidative stress of the high glucose (HG)-stimulated primary neurons as well as in the activation of microglial and astrocytes. Primary neurons, microglial, and astrocytes were isolated from newborn mice. Apoptosis was assessed by flow cytometry analysis and western blotting. Reactive oxygen species and glutathione levels were assessed to determine the oxidative stress. Markers of glial cells were detected by immunofluorescence staining. The results revealed that miR-130a-3p deficiency alleviated apoptosis and oxidative stress of HG-stimulated neurons as well as suppressed microglial and astrocyte activation. Moreover, sphingosine-1-phosphate receptor 1 (S1PR1) was found as a target downstream of miR-130a-3p. S1PR1 knockdown partially rescued the inhibitory effects of silenced miR-130a-3p on neuronal injury and glial activation. In conclusion, miR-130a-3p targets S1PR1 to activate the microglial and astrocytes and to promote apoptosis and oxidative stress of the HG-stimulated primary neurons. These findings may provide a novel insight into DPN treatment.
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Affiliation(s)
- Guang Yang
- Department of Pain, Funing County People’s Hospital, Funing County, Yancheng City, Jiangsu Province, 224400, China
| | - Jinxin Shi
- Department of Pain, Funing County People’s Hospital, No 111 Fucheng Street, Funing County, Yancheng City, Jiangsu Province, 224400, China
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15
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Mert T, Sahin E, Yaman S, Sahin M. Pulsed magnetic field treatment ameliorates the progression of peripheral neuropathy by modulating the neuronal oxidative stress, apoptosis and angiogenesis in a rat model of experimental diabetes. Arch Physiol Biochem 2022; 128:1658-1665. [PMID: 32633145 DOI: 10.1080/13813455.2020.1788098] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVE The present study aimed to investigate the possible anti-neuropathic effects of daily pulsed magnetic field treatments (PMF) in streptozotocin (60 mg/kg) induced 4 weeks diabetic (type-1) wistar rats (6-8 months). MATERIALS AND METHODS Body mass, blood glucose and thermal and mechanical sensations were evaluated during the PMF or sham-PMF in diabetic or non-diabetic rats (n = 7/group). After the measurements of motor nerve conduction velocities (MNCV), the levels of several biomarkers for oxidative stress, apoptosis and angiogenesis in spinal cord and sciatic nerve were measured. RESULTS PMF for 4 weeks significantly recovered the MCNV (96.9% and 63.9%) and almost fully (100%) restored to the latency and threshold. PMF also significantly suppressed the diabetes induced enhances in biochemical markers of both neuronal tissues. CONCLUSIONS Findings suggested that PMF might prevent the development of functional abnormalities in diabetic rats due to its anti-oxidative, anti-apoptotic and anti-angiogenic actions in neuronal tissues.
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Affiliation(s)
- Tufan Mert
- Department of Biophysics, Faculty of Medicine, Bolu Abant Izzet Baysal University, Bolu, Turkey
| | - Emel Sahin
- Department of Medical Biology, Faculty of Medicine, Gaziantep University, Gaziantep, Turkey
| | - Selma Yaman
- Department of Biophysics, Faculty of Medicine, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
| | - Mehmet Sahin
- Department of Medical Biology, Faculty of Medicine, Gaziantep University, Gaziantep, Turkey
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16
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Ali M, Aziz T. The Combination of Zinc and Melatonin Enhanced Neuroprotection and Attenuated Neuropathy in Oxaliplatin-Induced Neurotoxicity. Drug Des Devel Ther 2022; 16:3447-3463. [PMID: 36217449 PMCID: PMC9547652 DOI: 10.2147/dddt.s385914] [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: 08/13/2022] [Accepted: 09/22/2022] [Indexed: 11/23/2022] Open
Abstract
Objective The present study was designed to investigate the possible synergistic effects of melatonin with zinc in the prevention and treatment of oxaliplatin-induced neurotoxicity in rats. Methodology Forty-eight male Wistar albino rats were used and randomly allocated into six groups: The negative control group, oxaliplatin group, zinc + oxaliplatin group, melatonin + oxaliplatin group, zinc + melatonin + oxaliplatin prevention-approach group, and zinc + melatonin + oxaliplatin treatment-approach group. The thermal nociceptive/hyperalgesia tests were performed. Brain tissue homogenate was used for measuring GFAP, NCAM, TNF α, MAPK 14, NF-kB, GPX, and SOD. Brain tissue was sent for histopathological and immunohistochemistry studies. Results The combination therapies showed improvement in the behavioral tests. A significant increase in GPX and SOD with a significant decrease in GFAP levels resulted in the prevention approach. TNF α decreased significantly in the treatment approach. No significant changes were seen in NCAM, NFkB, and MAPK-14. The histopathological findings support the biochemical results. Additionally, immunohistochemistry revealed a significant attenuation of p53 and a non-significant decrease in Bcl2 levels in the combination groups. Conclusion The combination of zinc with melatonin for the prevention approach was effective in attenuating neurotoxicity induced by oxaliplatin. The proposed mechanisms are boosting the antioxidant system and attenuating the expression of p53, GFAP, and TNF-α.
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Affiliation(s)
- Mayyadah Ali
- Hiwa Cancer Hospital, Sulaimani, Kurdistan Region, Iraq
| | - Tavga Aziz
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Sulaimani, Sulaimani, Kurdistan Region, Iraq,Correspondence: Tavga Aziz, Tel +9647701523544, Email
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Sasajima S, Kondo M, Ohno N, Ujisawa T, Motegi M, Hayami T, Asano S, Asano-Hayami E, Nakai-Shimoda H, Inoue R, Yamada Y, Miura-Yura E, Morishita Y, Himeno T, Tsunekawa S, Kato Y, Nakamura J, Kamiya H, Tominaga M. Thermal gradient ring reveals thermosensory changes in diabetic peripheral neuropathy in mice. Sci Rep 2022; 12:9724. [PMID: 35697861 PMCID: PMC9192750 DOI: 10.1038/s41598-022-14186-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 05/18/2022] [Indexed: 12/03/2022] Open
Abstract
Diabetic peripheral neuropathy (DPN) includes symptoms of thermosensory impairment, which are reported to involve changes in the expression or function, or both, of nociceptive TRPV1 and TRPA1 channels in rodents. In the present study, we did not find changes in the expression or function of TRPV1 or TRPA1 in DPN mice caused by STZ, although thermal hypoalgesia was observed in a murine model of DPN or TRPV1−/− mice with a Plantar test, which specifically detects temperature avoidance. With a Thermal Gradient Ring in which mice can move freely in a temperature gradient, temperature preference can be analyzed, and we clearly discriminated the temperature-dependent phenotype between DPN and TRPV1−/− mice. Accordingly, we propose approaches with multiple behavioral methods to analyze the progression of DPN by response to thermal stimuli. Attention to both thermal avoidance and preference may provide insight into the symptoms of DPN.
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Affiliation(s)
- Sachiko Sasajima
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan.,Division of Cell Signaling, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan
| | - Masaki Kondo
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan.
| | - Nobuhiko Ohno
- Department of Anatomy, Division of Histology and Cell Biology, School of Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan.,Division of Ultrastructural Research, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan
| | - Tomoyo Ujisawa
- Division of Cell Signaling, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan.,Thermal Biology Group, Exploratory Research Center on Life and Living Systems (ExCELLS), 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan
| | - Mikio Motegi
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Tomohide Hayami
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Saeko Asano
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Emi Asano-Hayami
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Hiromi Nakai-Shimoda
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Rieko Inoue
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Yuichiro Yamada
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Emiri Miura-Yura
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Yoshiaki Morishita
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Tatsuhito Himeno
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Shin Tsunekawa
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Yoshiro Kato
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Jiro Nakamura
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan.,Department of Innovative Diabetes Therapy, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Hideki Kamiya
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Makoto Tominaga
- Division of Cell Signaling, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan. .,Thermal Biology Group, Exploratory Research Center on Life and Living Systems (ExCELLS), 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan. .,Department of Physiological Sciences, Sokendai, Okazaki, Japan.
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Busa P, Kuthati Y, Huang N, Wong CS. New Advances on Pathophysiology of Diabetes Neuropathy and Pain Management: Potential Role of Melatonin and DPP-4 Inhibitors. Front Pharmacol 2022; 13:864088. [PMID: 35496279 PMCID: PMC9039240 DOI: 10.3389/fphar.2022.864088] [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: 01/28/2022] [Accepted: 03/14/2022] [Indexed: 12/14/2022] Open
Abstract
Pre-diabetes and diabetes are growing threats to the modern world. Diabetes mellitus (DM) is associated with comorbidities such as hypertension (83.40%), obesity (90.49%), and dyslipidemia (93.43%), creating a substantial burden on patients and society. Reductive and oxidative (Redox) stress level imbalance and inflammation play an important role in DM progression. Various therapeutics have been investigated to treat these neuronal complications. Melatonin and dipeptidyl peptidase IV inhibitors (DPP-4i) are known to possess powerful antioxidant and anti-inflammatory properties and have garnered significant attention in the recent years. In this present review article, we have reviewed the recently published reports on the therapeutic efficiency of melatonin and DPP-4i in the treatment of DM. We summarized the efficacy of melatonin and DPP-4i in DM and associated complications of diabetic neuropathy (DNP) and neuropathic pain. Furthermore, we discussed the mechanisms of action and their efficacy in the alleviation of oxidative stress in DM.
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Affiliation(s)
- Prabhakar Busa
- Department of Anesthesiology, Cathay General Hospital, Taipei, Taiwan
| | - Yaswanth Kuthati
- Department of Anesthesiology, Cathay General Hospital, Taipei, Taiwan
| | - Niancih Huang
- Department of Anesthesiology, Tri-Service General Hospital, Taipei, Taiwan
- Grauate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Chih-Shung Wong
- Department of Anesthesiology, Cathay General Hospital, Taipei, Taiwan
- Department of Anesthesiology, Tri-Service General Hospital, Taipei, Taiwan
- Grauate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
- *Correspondence: Chih-Shung Wong,
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Antinociceptive and Antiallodynic Activity of Some 3-(3-Methylthiophen-2-yl)pyrrolidine-2,5-dione Derivatives in Mouse Models of Tonic and Neuropathic Pain. Int J Mol Sci 2022; 23:ijms23074057. [PMID: 35409413 PMCID: PMC8999233 DOI: 10.3390/ijms23074057] [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: 03/03/2022] [Revised: 04/01/2022] [Accepted: 04/04/2022] [Indexed: 11/16/2022] Open
Abstract
Antiseizure drugs (ASDs) are commonly used to treat a wide range of nonepileptic conditions, including pain. In this context, the analgesic effect of four pyrrolidine-2,5-dione derivatives (compounds 3, 4, 6, and 9), with previously confirmed anticonvulsant and preliminary antinociceptive activity, was assessed in established pain models. Consequently, antinociceptive activity was examined in a mouse model of tonic pain (the formalin test). In turn, antiallodynic and antihyperalgesic activity were examined in the oxaliplatin-induced model of peripheral neuropathy as well as in the streptozotocin-induced model of painful diabetic neuropathy in mice. In order to assess potential sedative properties (drug safety evaluation), the influence on locomotor activity was also investigated. As a result, three compounds, namely 3, 6, and 9, demonstrated a significant antinociceptive effect in the formalin-induced model of tonic pain. Furthermore, these substances also revealed antiallodynic properties in the model of oxaliplatin-induced peripheral neuropathy, while compound 3 attenuated tactile allodynia in the model of diabetic streptozotocin-induced peripheral neuropathy. Apart from favorable analgesic properties, the most active compound 3 did not induce any sedative effects at the active dose of 30 mg/kg after intraperitoneal (i.p.) injection.
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Raghav A, Singh M, Jeong GB, Giri R, Agarwal S, Kala S. New horizons of biomaterials in treatment of nerve damage in diabetes mellitus: A translational prospective review. Front Endocrinol (Lausanne) 2022; 13:1036220. [PMID: 36387914 PMCID: PMC9647066 DOI: 10.3389/fendo.2022.1036220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 09/28/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Peripheral nerve injury is a serious concern that leads to loss of neuronal communication that impairs the quality of life and, in adverse conditions, causes permanent disability. The limited availability of autografts with associated demerits shifts the paradigm of researchers to use biomaterials as an alternative treatment approach to recover nerve damage. PURPOSE The purpose of this study is to explore the role of biomaterials in translational treatment approaches in diabetic neuropathy. STUDY DESIGN The present study is a prospective review study. METHODS Published literature on the role of biomaterials in therapeutics was searched for. RESULTS Biomaterials can be implemented with desired characteristics to overcome the problem of nerve regeneration. Biomaterials can be further exploited in the treatment of nerve damage especially associated with PDN. These can be modified, customized, and engineered as scaffolds with the potential of mimicking the extracellular matrix of nerve tissue along with axonal regeneration. Due to their beneficial biological deeds, they can expedite tissue repair and serve as carriers of cellular and pharmacological treatments. Therefore, the emerging research area of biomaterials-mediated treatment of nerve damage provides opportunities to explore them as translational biomedical treatment approaches. CONCLUSIONS Pre-clinical and clinical trials in this direction are needed to establish the effective role of several biomaterials in the treatment of other human diseases.
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Affiliation(s)
- Alok Raghav
- Multidisciplinary Research Unit, Department of Health Research, Ganesh Shankar Vidyarthi Memorial (GSVM) Medical College, Kanpur, India
- *Correspondence: Alok Raghav,
| | - Manish Singh
- Multidisciplinary Research Unit, Department of Health Research, Ganesh Shankar Vidyarthi Memorial (GSVM) Medical College, Kanpur, India
- Department of Neurosurgery, Ganesh Shankar Vidyarthi Memorial (GSVM) Medical College, Kanpur, India
| | - Goo-Bo Jeong
- Department of Anatomy and Cell Biology, College of Medicine, Gachon University, Incheon, South Korea
| | - Richa Giri
- Multidisciplinary Research Unit, Department of Health Research, Ganesh Shankar Vidyarthi Memorial (GSVM) Medical College, Kanpur, India
- Kamlapat Singhania (KPS) Institute of Medicine, Ganesh Shankar Vidyarthi Memorial (GSVM) Medical College, Kanpur, India
| | - Saurabh Agarwal
- Multidisciplinary Research Unit, Department of Health Research, Ganesh Shankar Vidyarthi Memorial (GSVM) Medical College, Kanpur, India
- Kamlapat Singhania (KPS) Institute of Medicine, Ganesh Shankar Vidyarthi Memorial (GSVM) Medical College, Kanpur, India
| | - Sanjay Kala
- Department of Surgery, Ganesh Shankar Vidyarthi Memorial (GSVM) Medical College, Kanpur, India
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Singleton JR, Foster-Palmer S, Marcus RL. Exercise as Treatment for Neuropathy in the Setting of Diabetes and Prediabetic Metabolic Syndrome: A Review of Animal Models and Human Trials. Curr Diabetes Rev 2022; 18:e230921196752. [PMID: 34561989 DOI: 10.2174/1573399817666210923125832] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/21/2021] [Accepted: 05/17/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Peripheral neuropathy is among the most common complications of diabetes, but a phenotypically identical distal sensory predominant, painful axonopathy afflicts patients with prediabetic metabolic syndrome, exemplifying a spectrum of risk and continuity of pathogenesis. No pharmacological treatment convincingly improves neuropathy in the setting of metabolic syndrome, but evolving data suggest that exercise may be a promising alternative. OBJECTIVE The aim of the study was to review in depth the current literature regarding exercise treatment of metabolic syndrome neuropathy in humans and animal models, highlight the diverse mechanisms by which exercise exerts beneficial effects, and examine adherence limitations, safety aspects, modes and dose of exercise. RESULTS Rodent models that recapitulate the organismal milieu of prediabetic metabolic syndrome and the phenotype of its neuropathy provide a strong platform to dissect exercise effects on neuropathy pathogenesis. In these models, exercise reverses hyperglycemia and consequent oxidative and nitrosative stress, improves microvascular vasoreactivity, enhances axonal transport, ameliorates the lipotoxicity and inflammatory effects of hyperlipidemia and obesity, supports neuronal survival and regeneration following injury, and enhances mitochondrial bioenergetics at the distal axon. Prospective human studies are limited in scale but suggest exercise to improve cutaneous nerve regenerative capacity, neuropathic pain, and task-specific functional performance measures of gait and balance. Like other heath behavioral interventions, the benefits of exercise are limited by patient adherence. CONCLUSION Exercise is an integrative therapy that potently reduces cellular inflammatory state and improves distal axonal oxidative metabolism to ameliorate features of neuropathy in metabolic syndrome. The intensity of exercise need not improve cardinal features of metabolic syndrome, including weight, glucose control, to exert beneficial effects.
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Affiliation(s)
| | | | - Robin L Marcus
- Department Physical Therapy and Athletic Training, University of Utah, UT, United States
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22
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Ismail CAN, Ghazali AK, Suppian R, Abd Aziz CB, Long I. Lower Formalin-Induced Pain Responses in Painless Diabetic Neuropathy Rat Correlate with the Reduced Spinal Cord NR2B Subunit of N-Methyl-D-Aspartate Receptor Activation. J Mol Neurosci 2021; 72:598-609. [PMID: 34727325 DOI: 10.1007/s12031-021-01929-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 10/11/2021] [Indexed: 11/30/2022]
Abstract
Diabetic neuropathy (DN) is a late complication of diabetic mellitus and may rise into painful and painless variants. Limited studies have looked at nociceptive mechanisms of painless DN variant. The study aimed to determine phosphorylation and total NR2B subunit of N-methyl-D-aspartate receptor in the spinal cord of painless DN rat during early phase following formalin injection. Thirty-six Sprague-Dawley male rats were randomly assigned into three groups: control, painful, and painless DN (n = 12). The rats were developed into the early phase of DN for 2 weeks following diabetic induction. Two weeks later, the rats were injected with 5% formalin solution and flinching and licking responses were recorded for 60 min. The rats were sacrificed 3 days later, and the spinal cord enlargement region was collected. Immunohistochemistry and Western blot procedures were conducted to determine the phosphorylated and total NR2B subunit expressions. The results showed reduced flinching and licking responses in painless DN rats compared to control and painful DN groups, followed by a significant reduction in phosphorylated and total NR2B expression at both ipsilateral and contralateral regions of the spinal cord. In conclusion, reduced pain behavior responses in painless DN rats following formalin injection is possibly contributed by the reduced expression of phosphorylated and total NR2B subunit in the spinal cord.
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Affiliation(s)
- Che Aishah Nazariah Ismail
- Department of Physiology, School of Medical Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, 16150, Kelantan, Malaysia.
- Brain and Behaviour Clusters, School of Medical Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, 16150, Kelantan, Malaysia.
| | - Anis Kausar Ghazali
- Biostatistics and Research Methodology Unit, School of Medical Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Rapeah Suppian
- School of Health Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Che Badariah Abd Aziz
- Department of Physiology, School of Medical Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Idris Long
- School of Health Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, 16150, Kelantan, Malaysia
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A Novel In Vitro Assay Using Human iPSC-Derived Sensory Neurons to Evaluate the Effects of External Chemicals on Neuronal Morphology: Possible Implications in the Prediction of Abnormal Skin Sensation. Int J Mol Sci 2021; 22:ijms221910525. [PMID: 34638865 PMCID: PMC8508715 DOI: 10.3390/ijms221910525] [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: 08/24/2021] [Revised: 09/24/2021] [Accepted: 09/26/2021] [Indexed: 12/19/2022] Open
Abstract
Neuronal morphological changes in the epidermis are considered to be one of causes of abnormal skin sensations in dry skin-based skin diseases. The present study aimed to develop an in vitro model optimised for human skin to test the external factors that lead to its exacerbation. Human-induced pluripotent stem cell-derived sensory neurons (hiPSC-SNs) were used as a model of human sensory neurons. The effects of chemical substances on these neurons were evaluated by observing the elongation of nerve fibers, incidence of blebs (bead-like swellings), and the expression of nicotinamide mononucleotide adenylyl transferase 2 (NMNAT2). The nerve fiber length increased upon exposure to two common cosmetic preservatives-methylparaben and phenoxyethanol-but not to benzo[a]pyrene, an air pollutant at the estimated concentrations in the epidermis. Furthermore, the incidence of blebs increased upon exposure to benzo[a]pyrene. However, there was a decrease in the expression of NMNAT2 in nerve fibers, suggesting degenerative changes. No such degeneration was found after methylparaben or phenoxyethanol at the estimated concentrations in the epidermis. These findings suggest that methylparaben and phenoxyethanol promote nerve elongation in hiPSC-SNs, whereas benzo[a]pyrene induces nerve degeneration. Such alterations may be at least partly involved in the onset and progression of sensitive skin.
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Dabbara H, Schultz A, Im SH. Drosophila insulin receptor regulates diabetes-induced mechanical nociceptive hypersensitivity. MICROPUBLICATION BIOLOGY 2021; 2021. [PMID: 34549177 PMCID: PMC8449261 DOI: 10.17912/micropub.biology.000456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/31/2021] [Accepted: 09/01/2021] [Indexed: 11/17/2022]
Abstract
Painful diabetic neuropathy (PDN) is one of the predominant complications of diabetes that causes numbness, tingling, and extreme pain sensitivity. Understanding the mechanisms of PDN pathogenesis is important for patient treatments. Here we report Drosophila models of diabetes-induced mechanical nociceptive hypersensitivity. Type 2 diabetes-like conditions and loss of insulin receptor function in multidendritic sensory neurons lead to mechanical nociceptive hypersensitivity. Furthermore, we also found that restoring insulin signaling in multidendritic sensory neurons can block diabetes-induced mechanical nociceptive hypersensitivity. Our work highlights the critical role of insulin signaling in nociceptive sensory neurons in the regulation of diabetes-induced nociceptive hypersensitivities.
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Affiliation(s)
| | | | - Seol Hee Im
- Department of Biology, Haverford College, Haverford, PA
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25
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Kato J, Inoue T, Yokoyama M, Kuroha M. A review of a new voltage-gated Ca 2+ channel α 2δ ligand, mirogabalin, for the treatment of peripheral neuropathic pain. Expert Opin Pharmacother 2021; 22:2311-2322. [PMID: 34431423 DOI: 10.1080/14656566.2021.1958780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
INTRODUCTION Neuropathic pain (NeP) is a chronic and refractory condition in many patients, and its treatment is a challenge for physicians. A new voltage-gated Ca2+ channel α2δ ligand, mirogabalin, has a high specific binding affinity for the α2δ subunit, with a slower dissociation rate for α2δ-1 than α2δ-2 compared to that of pregabalin. Mirogabalin was shown to be effective in NeP animal models, with a margin of safety between central nervous system side effects and the analgesic effect of the dose. It exerted a favorable analgesic effect, was well tolerated in patients with peripheral NeP (P-NeP), and was first approved in Japan in 2019 and subsequently in Korea and Taiwan in 2020. AREAS COVERED The purpose of this article is to review the pharmacological characteristics, pharmacokinetics, and efficacy and safety of mirogabalin for NeP based on the results of non-clinical and clinical studies. EXPERT OPINION Although there are several first-line therapies for NeP, insufficient efficacy and adverse drug reactions of NeP drugs often cause patient dissatisfaction. Mirogabalin was effective and well tolerated with a step-wise dose increase in clinical studies on P-NeP patients. Thus, mirogabalin is expected to be a useful treatment option for patients with P-NeP.
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Affiliation(s)
- Jitsu Kato
- Department of Anesthesiology, Nihon University School of Medicine, Tokyo, Japan
| | - Teruyoshi Inoue
- Medical Science Department, Daiichi Sankyo Co., Ltd, Tokyo, Japan
| | - Mizuka Yokoyama
- Medical Science Department, Daiichi Sankyo Co., Ltd, Tokyo, Japan
| | - Masanori Kuroha
- Clinical Development Department, Daiichi Sankyo Co., Ltd, Tokyo, Japan
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Liao C, Zhou H, Chen H, Yang X, Zhong W, Zhang W. Patterns of nerve fiber impairments and neuronal activation in male diabetic rats with and without mechanical allodynia: a comparative study. Can J Diabetes 2021; 46:157-164. [DOI: 10.1016/j.jcjd.2021.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 06/28/2021] [Accepted: 08/05/2021] [Indexed: 11/17/2022]
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Xu XH, Du RQ, Li L, Yang LL, Zhang Y, Li QM. The role of G-protein-coupled receptor kinase 2 in diabetic mechanical hyperalgesia in rats. Eur J Pain 2021; 25:2039-2049. [PMID: 34101933 DOI: 10.1002/ejp.1819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 06/04/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND Previous studies have indicated a negative correlation between GRK2 expression and pain development and transmission. Here, we investigated whether G-protein-coupled receptor kinase 2 (GRK2) was involved in regulating diabetic mechanical hyperalgesia (DMH). METHODS The adeno-associated viral vectors containing the GRK2 gene (AAV-GRK2) were used to up-regulate GRK2 protein expression. The expression of GRK2 and exchange protein directly activated by cyclic adenosine monophosphate 1 (Epac1) in the dorsal root ganglion (DRG) of lumbar 4-6 was detected via immunoblotting and immunohistochemistry, and the transfection of the GRK2 gene was detected by immunofluorescence. RESULTS Low levels of GRK2 were able to sustain STZ-induced pain in DMH rats. Intrathecal injection of AAV-GRK2 vector up-regulated GRK2 expression, providing pain rain to rats with DMH. With an increase in DMH duration, there was a decrease in paw withdrawal threshold (PWT) value, aggravating the pain, resulting in a decreasing pattern in GRK2 protein expression over time, whereas Epac1 protein expression showed an opposite trend. CONCLUSION GRK2 expression regulated DMH progression and is expected to play a role in the development of targeted therapy for DMH. GRK2 and Epac1 expressions play a vital role in maintaining pain in DMH rats.
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Affiliation(s)
- Xiu-Hua Xu
- Postgraduate Training Base of Jinzhou Medical University, The PLA Rocket Force characteristic Medical Center, Beijing, P. R. China
| | - Rui-Qin Du
- Department of Endocrinology, The PLA Rocket Forced Characteristic Medical Center, Beijing, P. R. China
| | - Lin Li
- Department of Endocrinology, The PLA Rocket Forced Characteristic Medical Center, Beijing, P. R. China
| | - Lin-Lin Yang
- 5th Medical Department, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Yi Zhang
- Postgraduate Training Base of Jinzhou Medical University, The PLA Rocket Force characteristic Medical Center, Beijing, P. R. China
| | - Quan-Min Li
- Department of Endocrinology, The PLA Rocket Forced Characteristic Medical Center, Beijing, P. R. China
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Suryavanshi SV, Barve K, Addepalli V, Utpat SV, Kulkarni YA. Triphala Churna-A Traditional Formulation in Ayurveda Mitigates Diabetic Neuropathy in Rats. Front Pharmacol 2021; 12:662000. [PMID: 34149415 PMCID: PMC8211421 DOI: 10.3389/fphar.2021.662000] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 05/13/2021] [Indexed: 11/21/2022] Open
Abstract
Neuropathy is a common complication of diabetes affecting a large number of people worldwide. Triphala churna is a formulation mentioned in Ayurveda-a traditional system of medicine. It is a simple powder formulation consisting of powders of three fruits, Emblica officinalis L., Terminalia bellirica (Gaertn.) Roxb. and Terminalia chebula Retz. Individual components of Triphala churna have anti-diabetic and antioxidant activities. Hence, this study was designed to evaluate the effect of Triphala churna on diabetic neuropathy. Diabetes was induced with streptozotocin (STZ, 55 mg/kg, i. p.) in rats. Animals were grouped and treated orally with Triphala churna at a dose of 250, 500, and 1,000 mg/kg after 6 weeks of diabetes induction for the next 4 weeks. At the end of study, parameters such as body weight, plasma glucose level, motor nerve conduction velocity were determined. The effect of Triphala churna on thermal hyperalgesia, mechanical hyperalgesia, and mechanical allodynia was also determined at the end of study. The plasma cytokine levels like TGF-β1, TNF-α, and IL-1β were determined by ELISA assay. Histopathology study of the sciatic nerve was studied. Western blotting was performed to study the expression of neuronal growth factor.Treatment with Triphala churna showed a significant reduction in plasma glucose and a significant rise in body weight. Triphala treatment significantly increased the motor nerve conduction velocity and decreased the thermal and mechanical hyperalgesia, as well as mechanical allodynia. The treatment significantly inhibited levels of circulatory cytokines like TGF-β1, TNF-α, and IL-1β. Histopathology study confirmed the neuroprotective effect of Triphala churna. The expression of NGF was significantly increased in sciatic nerves after treatment with Triphala churna. From the results, it can be concluded that Triphala churna delays the progression of neuropathy in diabetic rats.
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Affiliation(s)
- Sachin V Suryavanshi
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM's NMIMS, Mumbai, India
| | - Kalyani Barve
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM's NMIMS, Mumbai, India
| | - Veeranjaneyulu Addepalli
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM's NMIMS, Mumbai, India
| | - Sachin V Utpat
- MES Ayurveda Mahavidyalaya, Ghanekhunt-Lote, Ratnagiri, India
| | - Yogesh A Kulkarni
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM's NMIMS, Mumbai, India
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Alomar SY, Gheit REAE, Enan ET, El-Bayoumi KS, Shoaeir MZ, Elkazaz AY, Al Thagfan SS, Zaitone SA, El-Sayed RM. Novel Mechanism for Memantine in Attenuating Diabetic Neuropathic Pain in Mice via Downregulating the Spinal HMGB1/TRL4/NF-kB Inflammatory Axis. Pharmaceuticals (Basel) 2021; 14:ph14040307. [PMID: 33915770 PMCID: PMC8065430 DOI: 10.3390/ph14040307] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/05/2021] [Accepted: 03/07/2021] [Indexed: 01/22/2023] Open
Abstract
Diabetic neuropathic pain (DNP) is a common diabetic complication that currently lacks an efficient therapy. The aim of the current work was to uncover the anti-allodynic and neuroprotective effects of memantine in a model of mouse diabetic neuropathy and its ameliorative effect on the high-mobility group box-1 (HMGB1)/toll-like receptor 4 (TLR4)/nuclear factor-k B (NF-kB) inflammatory axis. Diabetes was prompted by an alloxan injection (180 mg/kg) to albino mice. On the ninth week after diabetes induction, DNP was confirmed. Diabetic mice were randomly allocated to two groups (six mice each); a diabetes mellitus (DM) group and DM+memantine group (10 mg/kg, daily) for five weeks. DNP-related behaviors were assessed in terms of thermal hyperalgesia and mechanical allodynia by hot-plate and von Frey filaments. Enzyme-linked immunosorbent assay (ELISA) kits were used to measure the spinal glutamate, interleukin-1 beta (IL-1β), and tumor necrosis factor-α (TNF-α). The spinal levels of N-methyl-D-aspartate type 1 receptor (NMDAR1), HMGB1, TLR4, and phosphorylated NF-kB were assessed using Western blotting. Histopathological investigation of the spinal cord and sciatic nerves, together with the spinal cord ultrastructure, was employed for assessment of the neuroprotective effect. Memantine alleviated pain indicators in diabetic mice and suppressed excessive NMDAR1 activation, glutamate, and pro-inflammatory cytokine release in the spinal cord. The current study validated the ability of memantine to combat the HMGB1/TLR4/NF-kB axis and modulate overactive glutamate spinal transmission, corroborating memantine as an appealing therapeutic target in DNP.
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Affiliation(s)
- Suliman Y. Alomar
- Department of Zoology, College of Science, King Saud University, Riyadh 11495, Saudi Arabia
- Correspondence: (S.Y.A.); (S.A.Z.)
| | - Rehab E. Abo El Gheit
- Department of Physiology, Faculty of Medicine, Tanta University, Tanta 31527, Egypt;
| | - Eman T. Enan
- Department of Pathology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt;
| | - Khaled S. El-Bayoumi
- Department of Human Anatomy and Embryology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt;
| | - Mohamed Z. Shoaeir
- Department of Rheumatology and Rehabilitation, Al-Azhar Asyut Faculty of Medicine for Men, Assiut 71524, Egypt;
| | - Amany Y. Elkazaz
- Biochemistry and Molecular Biology Department, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt;
- Biochemistry and Molecular Biology Department, Faculty of Medicine, Port-Said University, Port Said 42526, Egypt
| | - Sultan S. Al Thagfan
- Department of Clinical and Hospital Pharmacy, College of Pharmacy, Taibah University, Al Madinah Al Munawwarah 41311, Saudi Arabia;
| | - Sawsan A. Zaitone
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, University of Tabuk, Tabuk 71451, Saudi Arabia
- Correspondence: (S.Y.A.); (S.A.Z.)
| | - Rehab M. El-Sayed
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Sinai University, El-Arish, North Sinai 45511, Egypt;
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Adki KM, Kulkarni YA. Neuroprotective effect of paeonol in streptozotocin-induced diabetes in rats. Life Sci 2021; 271:119202. [PMID: 33577853 DOI: 10.1016/j.lfs.2021.119202] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/01/2021] [Accepted: 02/04/2021] [Indexed: 01/12/2023]
Abstract
BACKGROUND Diabetic neuropathy is one of the most common microvascular complication of diabetes. It is associated with neuronal dysfunction and pain. Paeonol is an important natural product reported for its antioxidant, anti-inflammatory and antidiabetic activities. AIM The present research was planned to study effect of paeonol in diabetic peripheral neuropathy in rats. METHODS Diabetes was induced in Sprague Dawley rats by using Streptozotocin (55 mg/kg, i.p.). After six weeks, diabetic animals were treated daily with paeonol at a dose of 50, 100 and 200 mg/kg for four weeks. At the end of the treatment, plasma glucose, mechanical allodynia, mechanical hyperalgesia, thermal hyperalgesia and nerve conduction velocities were recorded. Oxidative stress parameters were studied in sciatic nerve. Histopathology study of sciatic nerve, NF-κB and MCP-1 expression were also studied at the end of study. KEY FINDINGS Paeonol treatment significantly lowered the plasma glucose levels, mechanical allodynia, mechanical hyperalgesia and thermal hyperalgesia as compared to diabetic control group. Paeonol treatment also enhanced the motor and sensory nerve conduction velocity. Paeonol treated diabetic animals showed significant changes in oxidative stress parameters. Histopathology study indicated that paeonol treatment prevented the neuronal damage, lowered demyelination and leukocyte infiltration. NF-κB and MCP-1 expression was significantly decreased in sciatic nerve of diabetic animals treated with paeonol. SIGNIFICANCE Results of the present study indicate that paeonol may be considered as effective option for management of diabetic neuropathy.
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Affiliation(s)
- Kaveri M Adki
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM's NMIMS, V.L. Mehta Road, Vile Parle (West), Mumbai 400 056, India
| | - Yogesh A Kulkarni
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM's NMIMS, V.L. Mehta Road, Vile Parle (West), Mumbai 400 056, India.
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Grover A, Sharma K, Gautam S, Gautam S, Gulati M, Singh SK. Diabetes and Its Complications: Therapies Available, Anticipated and Aspired. Curr Diabetes Rev 2021; 17:397-420. [PMID: 33143627 DOI: 10.2174/1573399816666201103144231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/26/2020] [Accepted: 09/12/2020] [Indexed: 11/22/2022]
Abstract
Worldwide, diabetes ranks among the ten leading causes of mortality. Prevalence of diabetes is growing rapidly in low and middle income countries. It is a progressive disease leading to serious co-morbidities, which results in increased cost of treatment and over-all health system of the country. Pathophysiological alterations in Type 2 Diabetes (T2D) progressed from a simple disturbance in the functioning of the pancreas to triumvirate to ominous octet to egregious eleven to dirty dozen model. Due to complex interplay of multiple hormones in T2D, there may be multifaceted approach in its management. The 'long-term secondary complications' in uncontrolled diabetes may affect almost every organ of the body, and finally may lead to multi-organ dysfunction. Available therapies are inconsistent in maintaining long term glycemic control and their long term use may be associated with adverse effects. There is need for newer drugs, not only for glycemic control but also for prevention or mitigation of secondary microvascular and macrovascular complications. Increased knowledge of the pathophysiology of diabetes has contributed to the development of novel treatments. Several new agents like Glucagon Like Peptide - 1 (GLP-1) agonists, Dipeptidyl Peptidase IV (DPP-4) inhibitors, amylin analogues, Sodium-Glucose transport -2 (SGLT- 2) inhibitors and dual Peroxisome Proliferator-Activated Receptor (PPAR) agonists are available or will be available soon, thus extending the range of therapy for T2D, thereby preventing its long term complications. The article discusses the pathophysiology of diabetes along with its comorbidities, with a focus on existing and novel upcoming antidiabetic drugs which are under investigation. It also dives deep to deliberate upon the novel therapies that are in various stages of development. Adding new options with new mechanisms of action to the treatment armamentarium of diabetes may eventually help improve outcomes and reduce its economic burden.
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Affiliation(s)
- Anu Grover
- Ipca Laboratories, Mumbai - 400063, India
| | - Komal Sharma
- Bhupal Nobles' Institute of Pharmaceutical Sciences, Udaipur, India
| | - Suresh Gautam
- Department of Biochemistry, Pacific Institute of Medical Sciences, Udaipur, India
| | - Srishti Gautam
- Ravinder Nath Tagore Medical College and Maharana Bhupal Govt. Hospital, Udaipur, India
| | - Monica Gulati
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab- 144411, India
| | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab- 144411, India
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Tiwari R, Wal P, Singh P, Tiwari G, Rai A. A Review on Mechanistic and Pharmacological Findings of Diabetic Peripheral Neuropathy including Pharmacotherapy. Curr Diabetes Rev 2021; 17:247-258. [PMID: 32928092 DOI: 10.2174/1573399816666200914141558] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 08/01/2020] [Accepted: 08/18/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Chronic hyperglycemia and related complications involving peripheral nerves in diabetes are one of the most severe microvascular complications with an average prevalence of 50-60%. Diabetic neuropathy is among the vascular disorders of diabetes, the most debilitating and crippled, lethal condition impacting patients's quality of life. METHODS In the present review article, several hypotheses associated with the pathogenesis of Diabetic Peripheral Neuropathy (DPN) have been introduced, among them metabolic pathways associated with polyol pathway, oxidative stress, production of reactive oxygen species (ROS) amplified under chronic hyperglycemic conditions and activation of transcription factor Nuclear factor-κB (NF- κB). The review article also possesses pathogenetic and pharmacologic treatments along with others, including acupressure, lidocaine, and capsaicin for DPN. CONCLUSION It may be concluded that we can combat the pathogenesis of DPN with different suggested treatments.
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Affiliation(s)
- Ruchi Tiwari
- Department of Pharmacy, Pranveer Singh Institute Of Technology, Kanpur - Agra - Delhi National Highway - 2 , Bhauti - Kanpur - 209305, India
| | - Pranay Wal
- Department of Pharmacy, Pranveer Singh Institute Of Technology, Kanpur - Agra - Delhi National Highway - 2 , Bhauti - Kanpur - 209305, India
| | - Priya Singh
- Department of Pharmacy, Pranveer Singh Institute Of Technology, Kanpur - Agra - Delhi National Highway - 2 , Bhauti - Kanpur - 209305, India
| | - Gaurav Tiwari
- Department of Pharmacy, Pranveer Singh Institute Of Technology, Kanpur - Agra - Delhi National Highway - 2 , Bhauti - Kanpur - 209305, India
| | - Awani Rai
- Department of Pharmacy, Pranveer Singh Institute Of Technology, Kanpur - Agra - Delhi National Highway - 2 , Bhauti - Kanpur - 209305, India
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Tékus V, Horváth ÁI, Csekő K, Szabadfi K, Kovács-Valasek A, Dányádi B, Deres L, Halmosi R, Sághy É, Varga ZV, Adeghate E, Kőszegi T, Mátyus P, Gábriel R, Ferdinandy P, Pintér E, Helyes Z. Protective effects of the novel amine-oxidase inhibitor multi-target drug SZV 1287 on streptozotocin-induced beta cell damage and diabetic complications in rats. Biomed Pharmacother 2020; 134:111105. [PMID: 33338750 DOI: 10.1016/j.biopha.2020.111105] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 11/12/2020] [Accepted: 12/02/2020] [Indexed: 12/16/2022] Open
Abstract
Diabetes mellitus is a common metabolic disease leading to hyperglycemia due to insufficient pancreatic insulin production or effect. Amine oxidase copper containing 3 (AOC3) is an enzyme that belongs to the semicarbazide-sensitive amine oxidase family, which may be a novel therapeutic target to treat diabetic complications. We aimed to explore the effects of AOC3 inhibition and to test the actions of our novel AOC3 inhibitor multi-target drug candidate, SZV 1287, compared to a selective reference compound, LJP 1207, in an 8-week long insulin-controlled streptozotocin (STZ)-induced (60 mg/kg i.p.) rat diabetes model. Both AOC3 inhibitors (20 mg/kg, daily s.c. injections) were protective against STZ-induced pancreatic beta cell damage determined by insulin immunohistochemistry and radioimmunoassay, neuropathic cold hypersensitivity measured by paw withdrawal latency decrease from 0 °C water, and retinal dysfunction detected by electroretinography. SZV 1287 showed greater inhibitory effects on beta cell damage, and reduced retinal apoptosis shown by histochemistry. Mechanical hypersensitivity measured by aesthesiometry, cardiac dysfunction and nitrosative stress determined by echocardiography and immunohistochemistry/Western blot, respectively, serum Na+, K+, fructosamine, and urine microalbumin, creatinine, total protein/creatinine ratio alterations did not develop in response to diabetes. None of these parameters were influenced by the treatments except for SZV 1287 reducing serum fructosamine and LJP 1207 increasing urine creatinine. We provide the first evidence for protective effects of AOC3 inhibition on STZ-induced pancreatic beta cell damage, neuropathic cold hypersensitivity and diabetic retinal dysfunction. Long-term treatment with our novel multi-target analgesic candidate, SZV 1287, is safe and effective also under diabetic conditions.
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Affiliation(s)
- Valéria Tékus
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Szigeti út 12, H-7624, Pécs, Hungary; Molecular Pharmacology Research Group & Centre for Neuroscience, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624, Pécs, Hungary
| | - Ádám István Horváth
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Szigeti út 12, H-7624, Pécs, Hungary; Molecular Pharmacology Research Group & Centre for Neuroscience, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624, Pécs, Hungary
| | - Kata Csekő
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Szigeti út 12, H-7624, Pécs, Hungary; Molecular Pharmacology Research Group & Centre for Neuroscience, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624, Pécs, Hungary
| | - Krisztina Szabadfi
- Department of Experimental Zoology and Neurobiology, University of Pécs, Faculty of Sciences, Ifjúság útja 6, H-7624, Pécs, Hungary; Retinal Neurobiology Research Group & Centre for Neuroscience, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624, Pécs, Hungary
| | - Andrea Kovács-Valasek
- Department of Experimental Zoology and Neurobiology, University of Pécs, Faculty of Sciences, Ifjúság útja 6, H-7624, Pécs, Hungary; Retinal Neurobiology Research Group & Centre for Neuroscience, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624, Pécs, Hungary
| | - Bese Dányádi
- Department of Anatomy, University of Pécs, Medical School, Szigeti út 12, H-7624, Pécs, Hungary; Retinal Neurobiology Research Group & Centre for Neuroscience, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624, Pécs, Hungary
| | - László Deres
- Genomics and Experimental Cardiology Research Group, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624, Pécs, Hungary; HAS-UP Nuclear-Mitochondrial Interactions Research Group, H-1245, Budapest, Hungary; 1st Department of Medicine, Clinical Centre, University of Pécs, Medical School, Ifjúság útja 13, H-7624, Pécs, Hungary
| | - Róbert Halmosi
- Genomics and Experimental Cardiology Research Group, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624, Pécs, Hungary; 1st Department of Medicine, Clinical Centre, University of Pécs, Medical School, Ifjúság útja 13, H-7624, Pécs, Hungary
| | - Éva Sághy
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Faculty of Medicine, Nagyvárad tér 4, H-1089, Budapest, Hungary
| | - Zoltán V Varga
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Faculty of Medicine, Nagyvárad tér 4, H-1089, Budapest, Hungary
| | - Ernest Adeghate
- Department of Anatomy, College of Medicine & Health Sciences, United Arab Emirates University, P.O. Box 17666, Al Ain, United Arab Emirates
| | - Tamás Kőszegi
- Department of Laboratory Medicine, University of Pécs, Medical School, Ifjúság útja 13, H-7624, Pécs, Hungary
| | - Péter Mátyus
- Institute of Digital Health Sciences, Semmelweis University, Faculty of Health and Public Services, Ferenc tér 15, H-1094, Budapest, Hungary
| | - Róbert Gábriel
- Department of Experimental Zoology and Neurobiology, University of Pécs, Faculty of Sciences, Ifjúság útja 6, H-7624, Pécs, Hungary; Retinal Neurobiology Research Group & Centre for Neuroscience, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624, Pécs, Hungary
| | - Péter Ferdinandy
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Faculty of Medicine, Nagyvárad tér 4, H-1089, Budapest, Hungary; Pharmahungary Group, Szeged, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Szigeti út 12, H-7624, Pécs, Hungary; PharmInVivo Ltd., Szondi György u. 10, H-7629, Pécs, Hungary
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, Szigeti út 12, H-7624, Pécs, Hungary; Molecular Pharmacology Research Group & Centre for Neuroscience, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624, Pécs, Hungary; PharmInVivo Ltd., Szondi György u. 10, H-7629, Pécs, Hungary.
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34
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Joksimovic SL, Evans JG, McIntire WE, Orestes P, Barrett PQ, Jevtovic-Todorovic V, Todorovic SM. Glycosylation of Ca V3.2 Channels Contributes to the Hyperalgesia in Peripheral Neuropathy of Type 1 Diabetes. Front Cell Neurosci 2020; 14:605312. [PMID: 33384586 PMCID: PMC7770106 DOI: 10.3389/fncel.2020.605312] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 11/18/2020] [Indexed: 01/19/2023] Open
Abstract
Our previous studies implicated glycosylation of the CaV3.2 isoform of T-type Ca2+ channels (T-channels) in the development of Type 2 painful peripheral diabetic neuropathy (PDN). Here we investigated biophysical mechanisms underlying the modulation of recombinant CaV3.2 channel by de-glycosylation enzymes such as neuraminidase (NEU) and PNGase-F (PNG), as well as their behavioral and biochemical effects in painful PDN Type 1. In our in vitro study we used whole-cell recordings of current-voltage relationships to confirm that CaV3.2 current densities were decreased ~2-fold after de-glycosylation. Furthermore, de-glycosylation induced a significant depolarizing shift in the steady-state relationships for activation and inactivation while producing little effects on the kinetics of current deactivation and recovery from inactivation. PDN was induced in vivo by injections of streptozotocin (STZ) in adult female C57Bl/6j wild type (WT) mice, adult female Sprague Dawley rats and CaV3.2 knock-out (KO mice). Either NEU or vehicle (saline) were locally injected into the right hind paws or intrathecally. We found that injections of NEU, but not vehicle, completely reversed thermal and mechanical hyperalgesia in diabetic WT rats and mice. In contrast, NEU did not alter baseline thermal and mechanical sensitivity in the CaV3.2 KO mice which also failed to develop painful PDN. Finally, we used biochemical methods with gel-shift analysis to directly demonstrate that N-terminal fragments of native CaV3.2 channels in the dorsal root ganglia (DRG) are glycosylated in both healthy and diabetic animals. Our results demonstrate that in sensory neurons glycosylation-induced alterations in CaV3.2 channels in vivo directly enhance diabetic hyperalgesia, and that glycosylation inhibitors can be used to ameliorate painful symptoms in Type 1 diabetes. We expect that our studies may lead to a better understanding of the molecular mechanisms underlying painful PDN in an effort to facilitate the discovery of novel treatments for this intractable disease.
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Affiliation(s)
- Sonja Lj Joksimovic
- Department of Anesthesiology, University of Colorado Denver, Aurora, CO, United States
| | - J Grayson Evans
- Undergraduate School of Arts and Sciences, University of Virginia, Charlottesville, VA, United States
| | - William E McIntire
- Department of Molecular Physiology and Biological Physics, University of Virginia Health System, Charlottesville, VA, United States
| | - Peihan Orestes
- Department of Anesthesiology, University of Virginia Health System, Charlottesville, VA, United States
| | - Paula Q Barrett
- Department of Pharmacology, University of Virginia, Charlottesville, VA, United States
| | | | - Slobodan M Todorovic
- Department of Anesthesiology, University of Colorado Denver, Aurora, CO, United States.,Neuroscience Graduate Program and Graduate Program in Pharmacology, University of Colorado Denver, Aurora, CO, United States
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35
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Shinouchi R, Shibata K, Hashimoto T, Jono S, Hasumi K, Nobe K. SMTP-44D improves diabetic neuropathy symptoms in mice through its antioxidant and anti-inflammatory activities. Pharmacol Res Perspect 2020; 8:e00648. [PMID: 33215875 PMCID: PMC7677968 DOI: 10.1002/prp2.648] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 07/21/2020] [Accepted: 07/27/2020] [Indexed: 01/28/2023] Open
Abstract
Diabetic neuropathy (DN) is one of the major complications of diabetes. However, there are few approved effective therapies for painful or insensate DN. Recent studies have implicated oxidative stress and inflammation in the pathogenesis of DN, and suppressing these could be an important therapeutic strategy. We previously reported that Stachybotrys microspora triprenyl phenol-44D (SMTP-44D) exhibits both antioxidant and anti-inflammatory activities. The aim of this study was to evaluate the effects of SMTP-44D in a mouse model of streptozotocin-induced DN. SMTP-44D was administered for 3 weeks after the disease induction, and its effects were evaluated on the basis of mechanical and thermal thresholds, blood flow in the bilateral hind paw, and blood flow and conduction velocity in the sciatic nerve. Furthermore, the levels of inflammatory factors, such as tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-6 and malondialdehyde (MDA), in the sciatic nerve were assessed. Neurological degeneration was assessed by measuring myelin thickness and g-ratio in the sciatic nerve. SMTP-44D treatment significantly improved allodynia, hyperalgesia, blood flow, and conduction velocity in DN model mice in a dose-dependent manner. Neurological degeneration was also significantly improved, accompanied by decreased levels of inflammatory factors (TNF-α, 57.8%; IL-1β, 51.4%; IL-6, 62.8%; and MDA, 40.7% reduction rate against the diabetes mellitus + normal saline group). Thus, SMTP-44D can improve allodynia and hyperalgesia in DN without affecting the body weight and blood glucose levels, which may be due to its antioxidant and anti-inflammatory properties. In conclusion, SMTP-44D could be a potential therapeutic agent for the treatment of DN.
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Affiliation(s)
- Ryosuke Shinouchi
- Division of PharmacologyDepartment of Pharmacology, Toxicology & TherapeuticsSchool of PharmacyShowa UniversityShinagawa‐kuTokyoJapan
- Pharmacology Research CenterShowa UniversityShinagawa‐kuTokyoJapan
| | - Keita Shibata
- Division of PharmacologyDepartment of Pharmacology, Toxicology & TherapeuticsSchool of PharmacyShowa UniversityShinagawa‐kuTokyoJapan
- Pharmacology Research CenterShowa UniversityShinagawa‐kuTokyoJapan
| | - Terumasa Hashimoto
- Division of PharmacologyDepartment of Pharmacology, Toxicology & TherapeuticsSchool of PharmacyShowa UniversityShinagawa‐kuTokyoJapan
- Pharmacology Research CenterShowa UniversityShinagawa‐kuTokyoJapan
| | - Shiori Jono
- Division of PharmacologyDepartment of Pharmacology, Toxicology & TherapeuticsSchool of PharmacyShowa UniversityShinagawa‐kuTokyoJapan
- Pharmacology Research CenterShowa UniversityShinagawa‐kuTokyoJapan
| | - Keiji Hasumi
- Department of Applied Biological ScienceTokyo University of Agriculture and TechnologyFuchu‐shiTokyoJapan
- TMS Co., LtdFuchu‐shiTokyoJapan
| | - Koji Nobe
- Division of PharmacologyDepartment of Pharmacology, Toxicology & TherapeuticsSchool of PharmacyShowa UniversityShinagawa‐kuTokyoJapan
- Pharmacology Research CenterShowa UniversityShinagawa‐kuTokyoJapan
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36
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Shayea AMF, Mousa AMA, Renno WM, Nadar MS, Qabazard B, Yousif MHM. Chronic Treatment With Hydrogen Sulfide Donor GYY4137 Mitigates Microglial and Astrocyte Activation in the Spinal Cord of Streptozotocin-Induced Diabetic Rats. J Neuropathol Exp Neurol 2020; 79:1320-1343. [DOI: 10.1093/jnen/nlaa127] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Abstract
Long-term diabetic patients suffer immensely from diabetic neuropathy. This study was designed to investigate the effects of hydrogen sulfide (H2S) on peripheral neuropathy, activation of microglia, astrocytes, and the cascade secretion of proinflammatory cytokines in the streptozotocin (STZ)-induced peripheral diabetic neuropathy rat model. STZ-induced diabetic rats were treated with the water-soluble, slow-releasing H2S donor GYY4137 (50 mg/kg; i.p.) daily for 4 weeks. Antiallodynic/antihyperalgesic activities were evaluated using different tests and histopathological changes and the expression of proinflammatory cytokines in the spinal cord were examined. GYY4137 treatment produced neuroprotective effects in the spinal cord of diabetic animals and modulated their sensory deficits. The treatment decreased allodynia (p < 0.05) and mechanical hyperalgesia (p < 0.01) and restored thermal hyperalgesia (p < 0.001) compared with diabetic rats. The treatment decreased the microglial response and increased astrocyte counts in spinal cord gray and white matter compared with untreated diabetic rats. Proinflammatory cytokines were reduced in the treated group compared with diabetic rats. These results suggest that H2S has a potentially ameliorative effect on the neuropathic pain through the control of astrocyte activation and microglia-mediated inflammation, which may be considered as a possible treatment of peripheral nerve hypersensitivity in diabetic patients.
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Affiliation(s)
- Abdulaziz M F Shayea
- Departments of Anatomy, Faculty of Medicine Health Science Center
- Occupational Therapy Faculty of Allied Health
| | - Alyaa M A Mousa
- Departments of Anatomy, Faculty of Medicine Health Science Center
| | - Waleed M Renno
- Departments of Anatomy, Faculty of Medicine Health Science Center
| | | | | | - Mariam H M Yousif
- Pharmacology & Toxicology Department, Faculty of Medicine (MHMY), Kuwait University, Kuwait
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37
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Treatment of Diabetic Neuropathy with A Novel PAR1-Targeting Molecule. Biomolecules 2020; 10:biom10111552. [PMID: 33203057 PMCID: PMC7698286 DOI: 10.3390/biom10111552] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/04/2020] [Accepted: 11/10/2020] [Indexed: 12/21/2022] Open
Abstract
Diabetic peripheral neuropathy (DPN) is a disabling common complication of diabetes mellitus (DM). Thrombin, a coagulation factor, is increased in DM and affects nerve function via its G-protein coupled protease activated receptor 1 (PAR1). Methods: A novel PAR1 modulator (PARIN5) was designed based on the thrombin PAR1 recognition site. Coagulation, motor and sensory function and small fiber loss were evaluated by employing the murine streptozotocin diabetes model. Results: PARIN5 showed a safe coagulation profile and showed no significant effect on weight or glucose levels. Diabetic mice spent shorter time on the rotarod (p < 0.001), and had hypoalgesia (p < 0.05), slow conduction velocity (p < 0.0001) and reduced skin innervation (p < 0.0001). Treatment with PARIN5 significantly improved rotarod performance (p < 0.05), normalized hypoalgesia (p < 0.05), attenuated slowing of nerve conduction velocity (p < 0.05) and improved skin innervation (p <0.0001). Conclusion: PARIN5 is a novel pharmacological approach for prevention of DPN development, via PAR1 pathway modulation.
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38
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Zhu C, Liu N, Tian M, Ma L, Yang J, Lan X, Ma H, Niu J, Yu J. Effects of alkaloids on peripheral neuropathic pain: a review. Chin Med 2020; 15:106. [PMID: 33024448 PMCID: PMC7532100 DOI: 10.1186/s13020-020-00387-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 09/20/2020] [Indexed: 12/16/2022] Open
Abstract
Neuropathic pain is a debilitating pathological pain condition with a great therapeutic challenge in clinical practice. Currently used analgesics produce deleterious side effects. Therefore, it is necessary to investigate alternative medicines for neuropathic pain. Chinese herbal medicines have been widely used in treating intractable pain. Compelling evidence revealed that the bioactive alkaloids of Chinese herbal medicines stand out in developing novel drugs for neuropathic pain due to multiple targets and satisfactory efficacy. In this review, we summarize the recent progress in the research of analgesic effects of 20 alkaloids components for peripheral neuropathic pain and highlight the potential underlying molecular mechanisms. We also point out the opportunities and challenges of the current studies and shed light on further in-depth pharmacological and toxicological studies of these bioactive alkaloids. In conclusion, the alkaloids hold broad prospects and have the potentials to be novel drugs for treating neuropathic pain. This review provides a theoretical basis for further applying some alkaloids in clinical trials and developing new drugs of neuropathic pain.
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Affiliation(s)
- Chunhao Zhu
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, No. 1160 Shengli Street, Yinchuan, 750004 Ningxia China
| | - Ning Liu
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, No. 1160 Shengli Street, Yinchuan, 750004 Ningxia China.,Ningxia Collaborative Innovation Center of Regional Characteristic Traditional Chinese Medicine, Ningxia Medical University, No. 692 Shengli Street, Yinchuan, 750004 Ningxia China
| | - Miaomiao Tian
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, No. 1160 Shengli Street, Yinchuan, 750004 Ningxia China
| | - Lin Ma
- Ningxia Key Laboratory of Craniocerebral Diseases of Ningxia Hui Autonomous Region, Ningxia Medical University, No. 1160 Shengli Street, Yinchuan, 750004 Ningxia China
| | - Jiamei Yang
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, No. 1160 Shengli Street, Yinchuan, 750004 Ningxia China.,Ningxia Collaborative Innovation Center of Regional Characteristic Traditional Chinese Medicine, Ningxia Medical University, No. 692 Shengli Street, Yinchuan, 750004 Ningxia China
| | - Xiaobing Lan
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, No. 1160 Shengli Street, Yinchuan, 750004 Ningxia China.,Ningxia Collaborative Innovation Center of Regional Characteristic Traditional Chinese Medicine, Ningxia Medical University, No. 692 Shengli Street, Yinchuan, 750004 Ningxia China
| | - Hanxiang Ma
- Department of Anesthesiology, General Hospital of Ningxia Medical University, No. 804 Shengli Street, Yinchuan, Ningxia Hui Autonomous Region, 750004 Ningxia China
| | - Jianguo Niu
- Ningxia Key Laboratory of Craniocerebral Diseases of Ningxia Hui Autonomous Region, Ningxia Medical University, No. 1160 Shengli Street, Yinchuan, 750004 Ningxia China
| | - Jianqiang Yu
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, No. 1160 Shengli Street, Yinchuan, 750004 Ningxia China.,Ningxia Collaborative Innovation Center of Regional Characteristic Traditional Chinese Medicine, Ningxia Medical University, No. 692 Shengli Street, Yinchuan, 750004 Ningxia China.,Ningxia Key Laboratory of Craniocerebral Diseases of Ningxia Hui Autonomous Region, Ningxia Medical University, No. 1160 Shengli Street, Yinchuan, 750004 Ningxia China
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39
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Lanigan LG, Russell DS, Woolard KD, Pardo ID, Godfrey V, Jortner BS, Butt MT, Bolon B. Comparative Pathology of the Peripheral Nervous System. Vet Pathol 2020; 58:10-33. [PMID: 33016246 DOI: 10.1177/0300985820959231] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The peripheral nervous system (PNS) relays messages between the central nervous system (brain and spinal cord) and the body. Despite this critical role and widespread distribution, the PNS is often overlooked when investigating disease in diagnostic and experimental pathology. This review highlights key features of neuroanatomy and physiology of the somatic and autonomic PNS, and appropriate PNS sampling and processing techniques. The review considers major classes of PNS lesions including neuronopathy, axonopathy, and myelinopathy, and major categories of PNS disease including toxic, metabolic, and paraneoplastic neuropathies; infectious and inflammatory diseases; and neoplasms. This review describes a broad range of common PNS lesions and their diagnostic criteria and provides many useful references for pathologists who perform PNS evaluations as a regular or occasional task in their comparative pathology practice.
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40
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Carbamazepine conquers spinal GAP43 deficiency and sciatic Nav1.5 upregulation in diabetic mice: novel mechanisms in alleviating allodynia and hyperalgesia. Arch Pharm Res 2020; 43:724-734. [PMID: 32676893 DOI: 10.1007/s12272-020-01249-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 07/02/2020] [Indexed: 12/19/2022]
Abstract
This work tested the role of carbamazepine in alleviating alloxan-induced diabetic neuropathy and the enhancement of spinal plasticity. Mice were randomized into four groups: normal, control, carbamazepine (25-mg/kg) and carbamazepine (50-mg/kg). Nine weeks after induction of diabetes, symptoms of neuropathy were confirmed and carbamazepine (or vehicle) was given every other day for five weeks. After completing the treatment period, mice were sacrificed and the pathologic features in the spinal cord and the sciatic nerves were determined. The spinal cords were evaluated for synaptic plasticity (growth associated protein-43, GAP43), microglia cell expression (by CD11b) and astrocyte expression (glial fibrillary acidic protein, GFAP). Further, sciatic nerve expression of Nav1.5 was measured. Results revealed that carbamazepine 50 mg/kg prolonged the withdrawal threshold of von-Frey filaments and increased the hot plate jumping time. Carbamazepine improved the histopathologic pictures of the sciatic nerves and spinal cords. Spinal cord of carbamazepine-treated groups had enhanced expression of GAP43 but lower content of CD11b and GFAP. Furthermore, specimens from the sciatic nerve indicated low expression of Nav1.5. In conclusion, this work provided evidence, for the first time, that the preventive effect of carbamazepine against diabetic neuropathy involves correction of spinal neuronal plasticity and glia cell expression.
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41
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Oza MJ, Kulkarni YA. Formononetin Ameliorates Diabetic Neuropathy by Increasing Expression of SIRT1 and NGF. Chem Biodivers 2020; 17:e2000162. [PMID: 32459048 DOI: 10.1002/cbdv.202000162] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 04/17/2020] [Indexed: 12/13/2022]
Abstract
Diabetic neuropathy is commonly observed complication in more than 50 % of type 2 diabetic patients. Histone deacetylases including SIRT1 have significant role to protect neuron from hyperglycemia induced damage. Formononetin (FMNT) is known for its effect to control hyperglycemia and also activate SIRT1. In present study, we evaluated effect of FMNT as SIRT1 activator in type 2 diabetic neuropathy. Type 2 diabetic neuropathy was induced in rats by modification of diet for 15 days using high fat diet and administration of streptozotocin (35 mg/kg/day, i. p.). FMNT treatment was initiated after confirmation of type 2 diabetes. Treatment was given for 16 weeks at 10, 20 and 40 mg/kg/day dose orally. FMNT treatment-controlled hypoglycemia and reduced insulin resistance significantly in diabetic animals. FMNT treatment reduced oxidative stress in sciatic nerve tissue. FMNT treatment also reduced thermal hyperalgesia and mechanical allodynia significantly. It improved conduction velocity in nerve and unregulated SIRT1 and NGF expression in sciatic nerve tissue. Results of present study indicate that continuous administration of FMNT protected diabetic animals from hyperglycemia induced neuronal damage by controlling hyperglycemia and increasing SIRT1 and NGF expression in nerve tissue. Thus, FMNT can be an effective candidate for treatment of type 2 diabetic neuropathy.
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Affiliation(s)
- Manisha J Oza
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM's NMIMS, V.L.Mehta Road, Vile Parle (W), Mumbai, 400056, India.,SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Vile Parle (W), Mumbai, 400056, India
| | - Yogesh A Kulkarni
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM's NMIMS, V.L.Mehta Road, Vile Parle (W), Mumbai, 400056, India
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De Gregorio C, Contador D, Díaz D, Cárcamo C, Santapau D, Lobos-Gonzalez L, Acosta C, Campero M, Carpio D, Gabriele C, Gaspari M, Aliaga-Tobar V, Maracaja-Coutinho V, Ezquer M, Ezquer F. Human adipose-derived mesenchymal stem cell-conditioned medium ameliorates polyneuropathy and foot ulceration in diabetic BKS db/db mice. Stem Cell Res Ther 2020; 11:168. [PMID: 32357914 PMCID: PMC7195803 DOI: 10.1186/s13287-020-01680-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/31/2020] [Accepted: 04/15/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Diabetic polyneuropathy (DPN) is the most common and early developing complication of diabetes mellitus, and the key contributor for foot ulcers development, with no specific therapies available. Different studies have shown that mesenchymal stem cell (MSC) administration is able to ameliorate DPN; however, limited cell survival and safety reasons hinder its transfer from bench to bedside. MSCs secrete a broad range of antioxidant, neuroprotective, angiogenic, and immunomodulatory factors (known as conditioned medium), which are all decreased in the peripheral nerves of diabetic patients. Furthermore, the abundance of these factors can be boosted in vitro by incubating MSCs with a preconditioning stimulus, enhancing their therapeutic efficacy. We hypothesize that systemic administration of conditioned medium derived from preconditioned MSCs could reverse DPN and prevent foot ulcer formation in a mouse model of type II diabetes mellitus. METHODS Diabetic BKS db/db mice were treated with systemic administration of conditioned medium derived from preconditioned human MSCs; conditioned medium derived from non-preconditioned MSCs or vehicle after behavioral signs of DPN was already present. Conditioned medium or vehicle administration was repeated every 2 weeks for a total of four administrations, and several functional and structural parameters characteristic of DPN were evaluated. Finally, a wound was made in the dorsal surface of both feet, and the kinetics of wound closure, re-epithelialization, angiogenesis, and cell proliferation were evaluated. RESULTS Our molecular, electrophysiological, and histological analysis demonstrated that the administration of conditioned medium derived from non-preconditioned MSCs or from preconditioned MSCs to diabetic BKS db/db mice strongly reverts the established DPN, improving thermal and mechanical sensitivity, restoring intraepidermal nerve fiber density, reducing neuron and Schwann cell apoptosis, improving angiogenesis, and reducing chronic inflammation of peripheral nerves. Furthermore, DPN reversion induced by conditioned medium administration enhances the wound healing process by accelerating wound closure, improving the re-epithelialization of the injured skin and increasing blood vessels in the wound bed in a skin injury model that mimics a foot ulcer. CONCLUSIONS Studies conducted indicate that MSC-conditioned medium administration could be a novel cell-free therapeutic approach to reverse the initial stages of DPN, avoiding the risk of lower limb amputation triggered by foot ulcer formation and accelerating the wound healing process in case it occurs.
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Affiliation(s)
- Cristian De Gregorio
- Center for Regenerative Medicine, School of Medicine Clínica Alemana-Universidad del Desarrollo, Av. Las Condes 12438, Lo Barnechea, Santiago, Chile
| | - David Contador
- Center for Regenerative Medicine, School of Medicine Clínica Alemana-Universidad del Desarrollo, Av. Las Condes 12438, Lo Barnechea, Santiago, Chile
| | - Diego Díaz
- Center for Regenerative Medicine, School of Medicine Clínica Alemana-Universidad del Desarrollo, Av. Las Condes 12438, Lo Barnechea, Santiago, Chile
| | - Constanza Cárcamo
- Center for Regenerative Medicine, School of Medicine Clínica Alemana-Universidad del Desarrollo, Av. Las Condes 12438, Lo Barnechea, Santiago, Chile
| | - Daniela Santapau
- Center for Regenerative Medicine, School of Medicine Clínica Alemana-Universidad del Desarrollo, Av. Las Condes 12438, Lo Barnechea, Santiago, Chile
| | - Lorena Lobos-Gonzalez
- Center for Regenerative Medicine, School of Medicine Clínica Alemana-Universidad del Desarrollo, Av. Las Condes 12438, Lo Barnechea, Santiago, Chile
| | - Cristian Acosta
- Institute of Histology and Embryology of Mendoza (IHEM-CONICET), School of Medicine, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - Mario Campero
- Department of Neurology & Neurosurgery, Hospital José Joaquín Aguirre, Universidad de Chile, Santiago, Chile
| | - Daniel Carpio
- Institute of Anatomy, Histology and Pathology, Universidad Austral de Chile, Valdivia, Chile
| | - Caterina Gabriele
- Research Center for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, University of Catanzaro, Catanzaro, Italy
| | - Marco Gaspari
- Research Center for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, University of Catanzaro, Catanzaro, Italy
| | - Victor Aliaga-Tobar
- Advanced Center for Chronic Diseases-ACCDiS, Faculty of Chemical and Pharmaceutical Sciences, Universidad de Chile, Santiago, Chile
| | - Vinicius Maracaja-Coutinho
- Advanced Center for Chronic Diseases-ACCDiS, Faculty of Chemical and Pharmaceutical Sciences, Universidad de Chile, Santiago, Chile
| | - Marcelo Ezquer
- Center for Regenerative Medicine, School of Medicine Clínica Alemana-Universidad del Desarrollo, Av. Las Condes 12438, Lo Barnechea, Santiago, Chile
| | - Fernando Ezquer
- Center for Regenerative Medicine, School of Medicine Clínica Alemana-Universidad del Desarrollo, Av. Las Condes 12438, Lo Barnechea, Santiago, Chile.
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Bagheri Tudashki H, Haddad Y, Charfi I, Couture R, Pineyro G. Ligand-specific recycling profiles determine distinct potential for chronic analgesic tolerance of delta-opioid receptor (DOPr) agonists. J Cell Mol Med 2020; 24:5718-5730. [PMID: 32279433 PMCID: PMC7214178 DOI: 10.1111/jcmm.15234] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/11/2020] [Accepted: 03/12/2020] [Indexed: 12/25/2022] Open
Abstract
δ-opioid receptor (DOPr) agonists have analgesic efficacy in chronic pain models but development of tolerance limits their use for long-term pain management. Although agonist potential for inducing acute analgesic tolerance has been associated with distinct patterns of DOPr internalization, the association between trafficking and chronic tolerance remains ill-defined. In a rat model of streptozotocin (STZ)-induced diabetic neuropathy, deltorphin II and TIPP produced sustained analgesia following daily (intrathecal) i.t. injections over six days, whereas similar treatment with SNC-80 or SB235863 led to progressive tolerance and loss of the analgesic response. Trafficking assays in murine neuron cultures showed no association between the magnitude of ligand-induced sequestration and development of chronic tolerance. Instead, ligands that supported DOPr recycling were also the ones producing sustained analgesia over 6-day treatment. Moreover, endosomal endothelin-converting enzyme 2 (ECE2) blocker 663444 prevented DOPr recycling by deltorphin II and TIPP and precipitated tolerance by these ligands. In conclusion, agonists, which support DOPr recycling, avoid development of analgesic tolerance over repeated administration.
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Affiliation(s)
| | - Youssef Haddad
- Department of Pharmacology and PhysiologyFaculty of MedicineUniversité de MontréalMontréalQCCanada
| | - Iness Charfi
- Centre de RechercheCentre Hospitalier Universitaire Ste-JustineMontréalQCCanada
- Department of Pharmacology and PhysiologyFaculty of MedicineUniversité de MontréalMontréalQCCanada
| | - Rejean Couture
- Department of Pharmacology and PhysiologyFaculty of MedicineUniversité de MontréalMontréalQCCanada
| | - Graciela Pineyro
- Centre de RechercheCentre Hospitalier Universitaire Ste-JustineMontréalQCCanada
- Department of Pharmacology and PhysiologyFaculty of MedicineUniversité de MontréalMontréalQCCanada
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Costantini R, Affaitati G, Fiordaliso M, Giamberardino MA. Viscero-visceral hyperalgesia in dysmenorrhoea plus previous urinary calculosis: Role of myofascial trigger points and their injection treatment in the referred area. Eur J Pain 2020; 24:933-944. [PMID: 32034979 DOI: 10.1002/ejp.1542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 01/02/2020] [Accepted: 02/05/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Women with dysmenorrhoea plus symptomatic urinary calculosis experience enhanced pain and referred muscle hyperalgesia from both conditions than women with one condition only (viscero-visceral hyperalgesia). The study aimed at verifying if enhanced dysmenorrhoea persists after urinary stone elimination in comorbid women and if local anaesthetic inactivation of myofascial trigger points (TrPs) in the lumbar area (of urinary pain referral) also relieves dysmenorrhoea. METHODS Thirty-one women with dysmenorrhoea plus previous urinary calculosis (Dys+PrCal) and lumbar TrPs, and 33 women with dysmenorrhoea without calculosis (Dys) underwent a 1-year assessment of menstrual pain and muscle hyperalgesia in the uterus-referred area (electrical pain threshold measurement in rectus abdominis, compared with thresholds of 33 healthy controls). At the end of the year, 16 comorbid patients underwent inactivation of TrPs through anaesthetic injections, whereas the remaining 12 received no TrP treatment. Both groups were monitored for another year at the end of which thresholds were re-measured. RESULTS In year1, Dys+PrCal presented significantly more painful menstrual cycles and lower abdominal thresholds than Dys, thresholds of both groups being significantly lower than normal (p < .001). Anaesthetic treatment versus no treatment of the lumbar TrP significantly reduced the number of painful cycles during year2 and significantly increased the abdominal thresholds (p < .0001). CONCLUSION Viscero-visceral hyperalgesia between uterus and urinary tract may persist after stone elimination due to nociceptive inputs from TrPs in the referred urinary area, since TrPs treatment effectively reverses the enhanced menstrual symptoms. The procedure could represent an integral part of the management protocol in these conditions. SIGNIFICANCE A past pain process from an internal organ can continue enhancing pain expression from a painful disease in another neuromerically connected organ (viscero-visceral hyperalgesia) if secondary myofascial trigger points (TrPs) developed in the referred area at the time of the previous visceral disease. Inactivation of these TrPs reverts the enhancement. Assessment and treatment of TrPs in referred areas from past visceral pain conditions should be systematically carried out to better control pain from current diseases in other viscera.
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Affiliation(s)
- Raffaele Costantini
- Institute of Surgical Pathology, Department of Medical, Oral and Biotechnological Sciences, "G D'Annunzio" University of Chieti, Chieti, Italy
| | - Giannapia Affaitati
- Geriatrics Clinic, Department of Medicine and Science of Aging, "G D'Annunzio" University of Chieti, Chieti, Italy
| | - Michele Fiordaliso
- Kliniske Abteilung für Allgemeine Viszeral und Thoraxchirurgie, Klinikum Darmstadt, Darmstadt, Germany
| | - Maria Adele Giamberardino
- Geriatrics Clinic, Department of Medicine and Science of Aging, "G D'Annunzio" University of Chieti, Chieti, Italy
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Tan JS, Lin CC, Chen GS. Vasomodulation of peripheral blood flow by focused ultrasound potentiates improvement of diabetic neuropathy. BMJ Open Diabetes Res Care 2020; 8:8/1/e001004. [PMID: 32188594 PMCID: PMC7078690 DOI: 10.1136/bmjdrc-2019-001004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 01/31/2020] [Accepted: 02/22/2020] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVE Effective treatment methods for diabetic peripheral neuropathy are still lacking. Here, a focused ultrasound (FUS) technique was developed to improve blood flow in diabetic peripheral vessels and potentially treat diabetic peripheral neuropathy. RESEARCH DESIGN AND METHODS Male adult Sprague-Dawley rats at 4 weeks poststreptozotocin injections were adopted as models for diabetic neuropathic rats. For single FUS treatment, blood perfusion in the skin of the pad of the middle toe was measured before, during, and after the medial and lateral plantar arteries were treated by FUS. For multiple FUS treatments, blood perfusion measurements, von Frey and hot plate testing and nerve conduction velocity measurements were performed before ultrasonic treatment on the first day of each week, and the microvascular and neural fiber densities in the pad of the toe were measured on the first day of the last week. RESULTS The blood perfusion rate significantly increased for 7-10 min in the control and neuropathic rats after a single ultrasound exposure. Multiple ultrasound treatments compared with no treatments significantly increased blood perfusion at the second week and further enhanced perfusion at the third week in the neuropathic rats. Additionally, the paw withdrawal force and latency significantly increased from 34.33±4.55 g and 3.96±0.25 s at the first week to 39.10±5.02 g and 4.77±0.71 s at the second week and to 41.13±2.57 g and 5.24±0.86 s at the third week, respectively. The low nerve conduction velocity in the diabetic rats also improved after the ultrasound treatments. Additionally, ultrasound treatments halted the decrease in microvessel and neural fiber densities in the skin of the diabetic toes. Histologic analysis indicated no damage to the treated arteries or neighboring tissue. CONCLUSIONS FUS treatment can increase upstream arterial blood flow in diabetic feet, ameliorate the decrease in downstream microvessel perfusion and halt neuropathic progression.
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Affiliation(s)
- Joo-Shin Tan
- Department of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan, Taiwan
| | - Chou-Ching Lin
- Department of Neurology, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Gin-Shin Chen
- Department of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan, Taiwan
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Ishizawa R, Kim HK, Hotta N, Iwamoto GA, Vongpatanasin W, Mitchell JH, Smith SA, Mizuno M. Skeletal Muscle Reflex-Induced Sympathetic Dysregulation and Sensitization of Muscle Afferents in Type 1 Diabetic Rats. Hypertension 2020; 75:1072-1081. [PMID: 32063060 DOI: 10.1161/hypertensionaha.119.14118] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The blood pressure response to exercise is exaggerated in the type 1 diabetes mellitus (T1DM). An overactive exercise pressor reflex (EPR) contributes to the potentiated pressor response. However, the mechanism(s) underlying this abnormal EPR activity remains unclear. This study tested the hypothesis that the heightened blood pressure response to exercise in T1DM is mediated by EPR-induced sympathetic overactivity. Additionally, the study examined whether the single muscle afferents are sensitized by PKC (protein kinase C) activation in this disease. Sprague-Dawley rats were intraperitoneally administered either 50 mg/kg streptozotocin (T1DM) or saline (control). At 1 to 3 weeks after administration, renal sympathetic nerve activity and mean arterial pressure responses to activation of the EPR, mechanoreflex, and metaboreflex were measured in decerebrate animals. Action potential responses to mechanical and chemical stimulation were determined in group IV afferents with pPKCα (phosphorylated-PKCα) levels assessed in dorsal root ganglia. Compared with control, EPR (58±18 versus 96±33%; P<0.05), mechanoreflex (21±13 versus 51±20%; P<0.05), and metaboreflex (40±20 versus 88±39%; P<0.01) activation in T1DM rats evoked significant increases in renal sympathetic nerve activity as well as mean arterial pressure. The response of group IV afferents to mechanical (18±24 versus 61±45 spikes; P<0.01) and chemical (0.3±0.4 versus 1.6±0.8 Hz; P<0.01) stimuli were significantly greater in T1DM than control. T1DM rats showed markedly increased pPKCα levels in dorsal root ganglia compared with control. These data suggest that in T1DM, abnormally muscle reflex-evoked increases in sympathetic activity mediate exaggerations in blood pressure. Further, sensitization of muscle afferents, potentially via PKC activation, may contribute to this abnormal circulatory responsiveness.
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Affiliation(s)
- Rie Ishizawa
- From the Department of Applied Clinical Research (R.I., N.H., S.A.S., M.M.), University of Texas Southwestern Medical Center, Dallas
| | - Han-Kyul Kim
- Department of Internal Medicine (H.-K.K., W.V., J.H.M., S.A.S., M.M.), University of Texas Southwestern Medical Center, Dallas
| | - Norio Hotta
- From the Department of Applied Clinical Research (R.I., N.H., S.A.S., M.M.), University of Texas Southwestern Medical Center, Dallas.,College of Life and Health Sciences, Chubu University, Kasugai, Japan (N.H.)
| | - Gary A Iwamoto
- Department of Cell Biology (G.A.I.), University of Texas Southwestern Medical Center, Dallas
| | - Wanpen Vongpatanasin
- Department of Internal Medicine (H.-K.K., W.V., J.H.M., S.A.S., M.M.), University of Texas Southwestern Medical Center, Dallas
| | - Jere H Mitchell
- Department of Internal Medicine (H.-K.K., W.V., J.H.M., S.A.S., M.M.), University of Texas Southwestern Medical Center, Dallas
| | - Scott A Smith
- From the Department of Applied Clinical Research (R.I., N.H., S.A.S., M.M.), University of Texas Southwestern Medical Center, Dallas.,Department of Internal Medicine (H.-K.K., W.V., J.H.M., S.A.S., M.M.), University of Texas Southwestern Medical Center, Dallas
| | - Masaki Mizuno
- From the Department of Applied Clinical Research (R.I., N.H., S.A.S., M.M.), University of Texas Southwestern Medical Center, Dallas.,Department of Internal Medicine (H.-K.K., W.V., J.H.M., S.A.S., M.M.), University of Texas Southwestern Medical Center, Dallas
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Ahmed GM, Maher EA, Elnassag BAEMR, Sayed HM, Kabbash SI. Effects of repetitive transcranial magnetic stimulation versus transcutaneous electrical nerve stimulation to decrease diabetic neuropathic pain. INTERNATIONAL JOURNAL OF THERAPY AND REHABILITATION 2020. [DOI: 10.12968/ijtr.2018.0037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Background/Aims Repetitive transcranial magnetic stimulation and transcutaneous electrical nerve stimulation have been studied repeatedly to reduce diabetic neuropathic pain. The objective of this study was to compare the effects of aerobic training plus one of the treatment therapies on decreasing pain severity in patients with diabetic peripheral neuropathy. Methods A total of 30 patients with diabetic peripheral neuropathy were randomly assigned into two equal groups: group A and group B. Both groups received aerobic training exercises. Group A received repetitive transcranial magnetic stimulation, and Group B received transcutaneous electrical nerve stimulation for 5 consecutive days in 1 week. Outcome measures included pain severity assessment using the Visual Analogue Scale and the serum β-endorphin levels. Results There was a non-significant difference in pre-treatment (P=0.061) and post-treatment (P=0.652) in the Visual Analogue Scale scores between groups. However, β-endorphin levels were significantly different between groups in post- (P=0.015) rather than pre-treatment (P=0.459) levels. A significant moderate correlation between β-endorphin levels and Visual Analogue Scale scores was found in group A (r=−0.6783) at (P=0.008), while it was not significant in group B (r=0.043) at (P=0.883). Conclusions Adding transcutaneous electrical nerve stimulation or repetitive transcranial magnetic stimulation therapies to aerobic training showed similar effects in reducing pain severity in patients with diabetic peripheral neuropathy.
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Affiliation(s)
- Gehan Mousa Ahmed
- Department of Physical Therapy for Neuromuscular Disorders and its Surgery, Faculty of Physical Therapy, Cairo University, Cairo, Egypt
| | - Eman Ahmed Maher
- Department of Clinical Neurophysiology, Faculty of Medicine, Cairo University, Cairo, Egypt Acknowledgements The authors would like to thank all patients who participated in this study
| | | | - Hayam Mahmoud Sayed
- Department of Physical Therapy for Neuromuscular Disorders and its Surgery, Faculty of Physical Therapy, Cairo University, Cairo, Egypt
| | - Sara Ibrahim Kabbash
- Department of Physical Therapy for Neuromuscular Disorders and its Surgery, Faculty of Physical Therapy, Cairo University, Cairo, Egypt
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Raafat KM, El-Zahaby SA. Niosomes of active Fumaria officinalis phytochemicals: antidiabetic, antineuropathic, anti-inflammatory, and possible mechanisms of action. Chin Med 2020; 15:40. [PMID: 32377229 PMCID: PMC7195756 DOI: 10.1186/s13020-020-00321-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 04/23/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Fumaria officinalis (F. officinalis, FO) has been used in many inflammatory and painful-ailments. The main aim of this work is to perform an in-depth bio-guided phytochemical investigation of F. officinalis by identifying its main-active ingredients. Optimizing pharmacokinetics via niosomal-preparation will also be done to enhance their in vivo antineuropathic and anti-inflammatory potentials, and to explore their possible-mechanism of actions. METHODS Bio-guided phytochemical-investigations including fractionation, isolation, chromatographic-standardization, and identification of the most active compound(s) were done. Optimized niosomal formulations of F. officinalis most active compound(s) were prepared and characterized. An in vivo biological-evaluation was done exploring acute, subchronic, and chronic alloxan-induced diabetes and diabetic-neuropathy, and carrageenan-induced acute inflammatory-pain and chronic-inflammatory edema. RESULTS In-vivo bio-guided fractionation and chromatographic phytochemical-analysis showed that the alkaloid-rich fraction (ARF) is the most-active fraction. ARF contained two major alkaloids; Stylopine 48.3%, and Sanguinarine 51.6%. In-vitro optimization, analytical, and in vivo biological-investigations showed that the optimized-niosome, Nio-2, was the most optimized niosomal formulation. Nio-2 had particle size 96.56 ± 1.87 nm and worked by improving the pharmacokinetic-properties of ARF developing adequate entrapment-efficiency, rapid-degradation, and acceptable stability in simulated GI conditions. FO, ARF, and Nio 2 were the most potent antidiabetic and anti-inflammatory compounds. The reduction of the pro-inflammatory tumor necrosis factor-alpha (TNF-alpha) and Interleukin 6 (IL-6), and elevation the anti-inflammatory factor IL-10 levels and amelioration of the in vivo oxidative-stress might be the main-mechanism responsible for their antinociceptive and anti-inflammatory activities. CONCLUSIONS Fumaria officinalis most-active fraction was identified as ARF. This study offers an efficient and novel practical oral formulation ameliorating various inflammatory conditions and diabetic complications especially neuropathic-pain.
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Affiliation(s)
- Karim M. Raafat
- grid.18112.3b0000 0000 9884 2169Department of Pharmaceutical Sciences, Faculty of Pharmacy, Beirut Arab University, Beirut, 115020 Lebanon
| | - Sally A. El-Zahaby
- grid.442603.70000 0004 0377 4159Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy and Drug Manufacturing, Pharos University in Alexandria, Alexandria, Egypt
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Yousuf MS, Maguire AD, Simmen T, Kerr BJ. Endoplasmic reticulum-mitochondria interplay in chronic pain: The calcium connection. Mol Pain 2020; 16:1744806920946889. [PMID: 32787562 PMCID: PMC7427143 DOI: 10.1177/1744806920946889] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 06/26/2020] [Indexed: 12/14/2022] Open
Abstract
Chronic pain is a debilitating condition that affects roughly a third to a half of the world's population. Despite its substantial effect on society, treatment for chronic pain is modest, at best, notwithstanding its side effects. Hence, novel therapeutics are direly needed. Emerging evidence suggests that calcium plays an integral role in mediating neuronal plasticity that underlies sensitization observed in chronic pain states. The endoplasmic reticulum and the mitochondria are the largest calcium repositories in a cell. Here, we review how stressors, like accumulation of misfolded proteins and oxidative stress, influence endoplasmic reticulum and mitochondria function and contribute to chronic pain. We further examine the shuttling of calcium across the mitochondrial-associated membrane as a mechanism of cross-talk between the endoplasmic reticulum and the mitochondria. In addition, we discuss how endoplasmic reticulum stress, mitochondrial impairment, and calcium dyshomeostasis are implicated in various models of neuropathic pain. We propose a novel framework of endoplasmic reticulum-mitochondria signaling in mediating pain hypersensitivity. These observations require further investigation in order to develop novel therapies for chronic pain.
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Affiliation(s)
- Muhammad Saad Yousuf
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada
| | - Aislinn D Maguire
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada
| | - Thomas Simmen
- Department of Cell Biology, University of Alberta, Edmonton, Canada
| | - Bradley J Kerr
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada
- Department of Pharmacology, University of Alberta, Edmonton, Canada
- Department of Anesthesiology and Pain Medicine, University of Alberta, Edmonton, Canada
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Ueda H. LPA receptor signaling as a therapeutic target for radical treatment of neuropathic pain and fibromyalgia. Pain Manag 2019; 10:43-53. [PMID: 31852400 DOI: 10.2217/pmt-2019-0036] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Since the first discovery that the bioactive lipid, lysophosphatidic acid (LPA) and LPA1 receptor signaling play a role in the initiation of neuropathic pain (NeuP), accumulated reports have supported the original findings and extended the study toward possible therapeutic applications. The present review describes beneficial roles of LPA receptor signaling in a variety of chronic pain, such as peripheral NeuP induced by nerve injury, chemotherapy and diabetes, central NeuP induced by cerebral ischemia with hemorrhage and spinal cord injury, and fibromyalgia-like wide spread pain induced by repeated cold, psychological and muscular acidic stress. Emerging mechanistic findings are the feed-forward amplification of LPA production through LPA1, LPA3 and microglia and the evidence for maintenance of chronic pain by LPA receptor signaling.
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Affiliation(s)
- Hiroshi Ueda
- Department of Molecular Pharmacology, Kyoto University Graduate School of Pharmaceutical Sciences, 46-29 Yoshida Shimoadachi-cho, Sakyo-ku, Kyoto 606-8501, Japan
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