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Monoamine oxidase-B inhibitor protects degenerating spinal neurons, enhances nerve regeneration and functional recovery in sciatic nerve crush injury model.
Neuropharmacology 2018; 128:231-243N

Abstract

Monoamine oxidase-B (MAOB), a flavin adenine dinucleotide (FAD), is an enzyme which catalyzes the oxidation of amines. MAOB is proposed to play a major role in the pathogenesis of neurodegeneration through the production of reactive oxygen species (ROS) and neurotoxins. The present study was designed to outline the effects of the MAOB inhibitor (MAOB-I) on neuroprotection of spinal neurons, regeneration of sciatic nerve fibers, and recovery of sensory-motor functions in the sciatic nerve crush injury model. Male Wistar rats (4-months-old) were assigned to i) Naïve (N), ii) Sham (S), iii) Sciatic nerve crush and treated with saline (CRUSH + SALINE) and iv) Sciatic nerve crush and treated with MAOB inhibitor (CRUSH + MAOB-I) groups (n = 10/group). In groups iii and iv, the crush injury was produced by crushing the sciatic nerve followed by treatment with saline or MAOB-I (Selegiline® 2.5 mg/kg) intraperitoneally for 10 days. Behavioral tests were conducted from week 1 to week 6. At the end of the study, sciatic nerve and lumbar spinal cord were examined by immunohistochemistry, light and electron microscopy. MAOB-I treatment showed significant improvement in sensory and motor functions compared to saline treatment (p < 0.05-0.001) in injured nerves. The morphological study showed a significantly increased number of nerve fibers in sciatic nerve distal to the site of injury (p < 0.05), with better myelination pattern in CRUSH + MAOB-I treated group compared to CRUSH + SALINE group. Spinal cord ventral horns showed a significant increase in the number of NeuN-immunoreactive neurons in the MAOB-I treated group compared to Saline treated group (p < 0.01). MAOB-I has a significant potential for protecting the degenerating spinal cord neurons and enhancing the regeneration of injured sciatic nerve fibers following crush injury.

Authors+Show Affiliations

Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait.Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait. Electronic address: wrenno@hsc.edu.kw.Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait.Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait.Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait.Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait.Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29054367

Citation

Hussain, Al-Shimali M., et al. "Monoamine oxidase-B Inhibitor Protects Degenerating Spinal Neurons, Enhances Nerve Regeneration and Functional Recovery in Sciatic Nerve Crush Injury Model." Neuropharmacology, vol. 128, 2018, pp. 231-243.
Hussain AM, Renno WM, Sadek HL, et al. Monoamine oxidase-B inhibitor protects degenerating spinal neurons, enhances nerve regeneration and functional recovery in sciatic nerve crush injury model. Neuropharmacology. 2018;128:231-243.
Hussain, A. M., Renno, W. M., Sadek, H. L., Kayali, N. M., Al-Salem, A., Rao, M. S., & Khan, K. M. (2018). Monoamine oxidase-B inhibitor protects degenerating spinal neurons, enhances nerve regeneration and functional recovery in sciatic nerve crush injury model. Neuropharmacology, 128, pp. 231-243. doi:10.1016/j.neuropharm.2017.10.020.
Hussain AM, et al. Monoamine oxidase-B Inhibitor Protects Degenerating Spinal Neurons, Enhances Nerve Regeneration and Functional Recovery in Sciatic Nerve Crush Injury Model. Neuropharmacology. 2018;128:231-243. PubMed PMID: 29054367.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Monoamine oxidase-B inhibitor protects degenerating spinal neurons, enhances nerve regeneration and functional recovery in sciatic nerve crush injury model. AU - Hussain,Al-Shimali M, AU - Renno,Waleed M, AU - Sadek,Hanaa L, AU - Kayali,Noura M, AU - Al-Salem,Aseel, AU - Rao,Muddanna S, AU - Khan,Khalid M, Y1 - 2017/10/17/ PY - 2017/07/03/received PY - 2017/09/28/revised PY - 2017/10/15/accepted PY - 2017/10/22/pubmed PY - 2018/7/18/medline PY - 2017/10/22/entrez KW - Electron microscopy KW - Foot position KW - Mechanical hyperalgesia KW - Morphometric analysis KW - Neuroregeneration KW - Toe spread SP - 231 EP - 243 JF - Neuropharmacology JO - Neuropharmacology VL - 128 N2 - Monoamine oxidase-B (MAOB), a flavin adenine dinucleotide (FAD), is an enzyme which catalyzes the oxidation of amines. MAOB is proposed to play a major role in the pathogenesis of neurodegeneration through the production of reactive oxygen species (ROS) and neurotoxins. The present study was designed to outline the effects of the MAOB inhibitor (MAOB-I) on neuroprotection of spinal neurons, regeneration of sciatic nerve fibers, and recovery of sensory-motor functions in the sciatic nerve crush injury model. Male Wistar rats (4-months-old) were assigned to i) Naïve (N), ii) Sham (S), iii) Sciatic nerve crush and treated with saline (CRUSH + SALINE) and iv) Sciatic nerve crush and treated with MAOB inhibitor (CRUSH + MAOB-I) groups (n = 10/group). In groups iii and iv, the crush injury was produced by crushing the sciatic nerve followed by treatment with saline or MAOB-I (Selegiline® 2.5 mg/kg) intraperitoneally for 10 days. Behavioral tests were conducted from week 1 to week 6. At the end of the study, sciatic nerve and lumbar spinal cord were examined by immunohistochemistry, light and electron microscopy. MAOB-I treatment showed significant improvement in sensory and motor functions compared to saline treatment (p < 0.05-0.001) in injured nerves. The morphological study showed a significantly increased number of nerve fibers in sciatic nerve distal to the site of injury (p < 0.05), with better myelination pattern in CRUSH + MAOB-I treated group compared to CRUSH + SALINE group. Spinal cord ventral horns showed a significant increase in the number of NeuN-immunoreactive neurons in the MAOB-I treated group compared to Saline treated group (p < 0.01). MAOB-I has a significant potential for protecting the degenerating spinal cord neurons and enhancing the regeneration of injured sciatic nerve fibers following crush injury. SN - 1873-7064 UR - https://www.unboundmedicine.com/medline/citation/29054367/Monoamine_oxidase_B_inhibitor_protects_degenerating_spinal_neurons_enhances_nerve_regeneration_and_functional_recovery_in_sciatic_nerve_crush_injury_model_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0028-3908(17)30487-2 DB - PRIME DP - Unbound Medicine ER -