Nigella sativa amliorates inflammation and demyelination in the experimental autoimmune encephalomyelitis-induced
Neveen A Noor1, Heba M Fahmy2, Faten F Mohammed3
1Department of Zoology, Faculty of Science, Cairo University Giza, Egypt.
Abstract:
Multiple sclerosis (MS) is the major, immune-mediated, demyelinating neurodegenerative disease of the central nervous system (CNS). Experimental autoimmune encephalomyelitis (EAE) is a well-established animal model of MS. The aim of the present study was to investigate the protective and ameliorative effects of N. sativa seeds (2.8 g/kg body weight) in EAE-induced Wistar rats. EAE-induced rats were divided into: 1- EAE-induced rats ("EAE" group). 2- "N. sativa + EAE" group received daily oral administration of N. sativa 2 weeks prior EAE induction until the end of the experiment. 3- "EAE + N. sativa" group received daily oral administration of N. sativa after the appearance of first clinical signs until the end of the experiment. All animals were decapitated at the 28th day post EAE-induction. EAE was investigated using histopathological, immunohistochemical and ultrastructural examinations in addition to determination of some oxidative stress parameters in the cerebellum and medulla. N. sativa suppressed inflammation observed in EAE-induced rats. In addition, N. sativa enhanced remyelination in the cerebellum. Moreover, N. sativa reduced the expression of transforming growth factor beta 1 (TGF β1). N. sativa seeds could provide a promising agent effective in both the protection and treatment of EAE.
Insights
Nigella sativa seeds show promise in treating and preventing experimental autoimmune encephalomyelitis (EAE), an animal model for multiple sclerosis (MS). This natural compound reduced inflammation and promoted nerve repair in the brain.
Area of Science:
- Neuroimmunology
- Demyelinating Diseases
- Natural Product Research
Background:
- Multiple Sclerosis (MS) is a significant immune-mediated demyelinating neurodegenerative disease of the Central Nervous System (CNS).
- Experimental Autoimmune Encephalomyelitis (EAE) serves as a key animal model for studying MS pathogenesis and potential therapies.
Purpose of the Study:
- To evaluate the protective and therapeutic potential of Nigella sativa (N. sativa) seeds in an EAE rat model.
- To investigate the effects of N. sativa on inflammation, remyelination, and oxidative stress in the CNS during EAE.
Main Methods:
- Wistar rats were induced with EAE and treated with N. sativa either preventatively or therapeutically.
- Histopathological, immunohistochemical, and ultrastructural analyses were performed on CNS tissues.
- Oxidative stress markers in the cerebellum and medulla were quantified.
Main Results:
- N. sativa administration significantly suppressed inflammation in EAE-induced rats.
- N. sativa treatment enhanced remyelination in the cerebellum.
- Expression of transforming growth factor beta 1 (TGF-β1) was reduced by N. sativa.
Conclusions:
- Nigella sativa seeds demonstrate significant protective and ameliorative effects in the EAE model.
- N. sativa shows potential as a therapeutic agent for conditions like multiple sclerosis due to its anti-inflammatory and neuroprotective properties.
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