Source Article: Peppermint protects against radiation-induced testicular damage http://www.greenmedinfo.com/article/peppermint-protects-against-radiation-induced-testicular-damage
Protection against radiation-induced testicular damage in Swiss albino mice by Mentha piperita (Linn.).
Basic Clin Pharmacol Toxicol. 2009 Apr;104(4):329-34. PMID: 19320637
Ravindra M Samarth, Meenakshi Samarth
Radiation and Cancer Biology Laboratory, Department of Zoology, University of Rajasthan, Jaipur 302055, India. firstname.lastname@example.org
The protective effects of Mentha piperita leaf extract against radiation-induced damage in testis of Swiss albino mice have been studied. Animals (Male Swiss albino mice) were given M. piperita leaf extract orally (1 g/kg body weight/day) for three consecutive days before radiation exposure (8 Gy gamma-radiation). Mice were autopsied at 1, 3, 7, 14, and 30 days after irradiation to evaluate the radiomodulatory effect in terms of histological alterations, lipid peroxidation, and acid and alkaline phosphatases levels in testis. Radiation treatment showed reduction in the testis weight during all days of observation, however, in the M. piperita leaf extract-pretreated irradiated group there was a significant increase in testis weight. Radiation treatment induced moderate to severe testicular atrophy with degeneration of germ cells in seminiferous tubules. The tubules were shrunken and greatly depleted of germ cells. Sertoli cells with few germ cells were observed in the lumen. However, animals pre-treated with M. piperita leaf extract and exposed to radiation showed normal testicular morphology with regular arrangement of germ cells and slight degeneration of seminiferous epithelium. Significant decreases in the lipid peroxidation and acid phosphatase level and increase in level of alkaline phosphatase were observed in testis. The M. piperita leaf extract showed high amount of phenolic content, flavonoids content and flavonols. The results of the present study suggest that M. piperita has a significant radioprotective effect and the amount of phenolic compounds, the content of flavonoids and flavonols of M. piperita leaf extract may be held responsible for radioprotective effect due to their antioxidant and radical scavenging activity.
Source Article: Peppermint has neuro-protective properties against gamma irradiation induced DNA fragmentation and apoptosis http://www.greenmedinfo.com/article/peppermint-has-neuro-protective-properties-against-gamma-irradiation-induced-d
Mentha piperita as a pivotal neuro-protective agent against gamma irradiation induced DNA fragmentation and apoptosis : Mentha extract as a neuroprotective against gamma irradiation.
Cytotechnology. 2013 Jan ;65(1):145-56. Epub 2012 Sep 21. PMID: 23011739
Hanaa A Hassan, Hani S Hafez, Mona S Goda
Physiology Division, Zoology Department, Faculty of Science, Mansoura University, Mansoura, Egypt, email@example.com.
Ionizing radiation is classified as a potent carcinogen, and its injury to living cells, in particular to DNA, is due to oxidative stress enhancing apoptotic cell death. Our present study aimed to characterize and semi-quantify the radiation-induced apoptosis in CNS and the activity of Mentha extracts as neuron-protective agent. Our results through flow cytometry exhibited the significant disturbance and arrest in cell cycle in % of M1: SubG1 phase, M2: G0/1 phase of diploid cycle, M3: S phase and M4: G2/M phase of cell cycle in brain tissue (p < 0.05). Significant increase in % of apoptosis and P53 protein expression as apoptotic biomarkers were coincided with significant decrease in Bcl(2) as an anti-apoptotic marker. The biochemical analysis recorded a significant decrease in the levels of reduced glutathione, superoxide dismutase, deoxyribonucleic acid (DNA) and ribonucleic acid contents. Moreover, numerous histopathological alterations were detected in brain tissues of gamma irradiated mice such as signs of chromatolysis in pyramidal cells of cortex, nuclear vacuolation, numerous apoptotic cell, and neural degeneration. On the other hand, gamma irradiated mice pretreated with Mentha extract showed largely an improvement in all the above tested parameters through a homeostatic state for the content of brain apoptosis and stabilization of DNA cycle with a distinct improvement in cell cycle analysis and antioxidant defense system. Furthermore, the aforementioned effects of Mentha extracts through down-regulation of P53 expression and up-regulation of Bcl(2) domain protected brain structure from extensive damage. Therefore, Mentha extract seems to have a significant role to ameliorate the neuronal injury induced by gammairradiation.