Abstract
Cinnamon (Cinnamomum verum and C. cassia) is a medicinal plant, widely-used as a culinary spice. It possesses various therapeutic effects and can slow down the progression of neurological disorders impressively. In this article, the effects of hydro-alcohol extract and essential oil of C. verum and C. cassia and its main bioactive component cinnamaldehyde, has been examined on 6-OHDA-exposed PC12 cells as an in vitro model of Parkinson's disease. The cytotoxicity and cell apoptosis has been induced by 6-OHDA in PC12 cells. The protective effect was determined by measuring cell viability, the amount of reactive oxygen species (ROS), and apoptosis. Cell viability and apoptosis were assessed using resazurin assay, flow cytometry of propidium iodide (PI) stained cells, and western blot analysis. 6-OHDA resulted in the death and apoptosis of cells while, pretreatment with the extract and essential oil of C. verum and C. cassia at 20 µg/ml and cinnamaldehyde at 5 and 10 µM for 24 h could significantly increase the viability (p < 0.001), and decrease ROS content (p < 0.05). Pretreatment with the extracts increased survivin and decreased cyt-c whereas, pretreatment with the essential oil decreased cyt-c, increased survivin, and reduced P-p44/42/p44/42 levels to a level near that of the related control. The extract and essential oil of C. verum and C. cassia can be effective against 6-OHDA cytotoxicity. It is suggested that, the synergistic effects of cinnamaldehyde and other components of extract and essential oil promote cinnamon’s medicinal properties.
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Abbreviations
- PD:
-
Parkinson's disease
- 6-OHDA:
-
6-Hydroxydopamine
- SN:
-
Substantia nigra
- ROS:
-
Reactive oxygen species
- DMSO:
-
Dimethyl sulfoxide
- DCFH-DA:
-
2′,7′-dichlorofluorescin diacetate
- PI:
-
Propidiumiodide
- PBS:
-
Phosphate-buffer saline
- BHT:
-
Butylated hydroxytoluene
- SOD:
-
Superoxide dismutase
- CAT:
-
Catalase
- GOX:
-
Glucose oxidase
- GSH:
-
Glutathione
- ANOVA:
-
One-way analysis of variance
- NO:
-
Nitric oxide
- CC:
-
Cytotoxic concentration
- H2O2 :
-
Hydrogen peroxide
- TH:
-
Tyrosine hydroxylase
- CA:
-
Cinnamic aldehyde
- MPTP:
-
1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine
- LC3:
-
Light chain 3
- NaB:
-
Sodium benzoate
- iNOS:
-
Inducible nitric oxide synthase
- NF-κB:
-
Nuclear factor κB
- PKA:
-
Protein kinase A
- CREB:
-
Activation of cAMP response element binding
- CNS:
-
Central nervous system
- SOCS3:
-
Suppressor of cytokine signaling 3
- IL:
-
Interleukin
- TNF:
-
Tumor necrosis factor
- CEppt:
-
Cinnamon extract precipitation
- α-syn:
-
α-Synuclein
- Cyt-c:
-
Cytochrome c
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Acknowledgements
This work was supported by Grant No. 951831 from Research Affairs of Mashhad University of Medical Sciences. The authors wish to thank Mr. Malaekeh for reading flow cytometry test samples.
Funding
This work has been supported by Grant No.951831 from the Research Affairs of Mashhad University of Medical Sciences, Mashhad, Iran.
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Elham Ramazani performed the experiments, computations, analyzed the data, and wrote the manuscript. Mahdi Yazd Fazeli performed the experiments and computations. Seyed Ahmad Emami, Behjat Javadi and Javad Asili conceived, designed, and supervised the project, wrote the manuscript and final approval of the manuscript. Leila Mohtashami performed the experiments and reviewed the manuscript. Zahra Tayarani-Najaran conceived, designed, and supervised the project, wrote the manuscript, provided financial support and final approval of the manuscript.
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This work is carried out on PC12 cells and there is no need for ethical clearance.
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Ramazani, E., YazdFazeli, M., Emami, S.A. et al. Protective effects of Cinnamomum verum, Cinnamomum cassia and cinnamaldehyde against 6-OHDA-induced apoptosis in PC12 cells. Mol Biol Rep 47, 2437–2445 (2020). https://doi.org/10.1007/s11033-020-05284-y
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DOI: https://doi.org/10.1007/s11033-020-05284-y