Cytotoxicity against A549 Human Lung Cancer Cell Line via the Mitochondrial Membrane Potential and Nuclear Condensation Effects of Nepeta paulsenii Briq., a Perennial Herb

The genus Nepeta belongs to the largest Lamiaceae family, with 300 species, which are distributed throughout the various regions of Africa, Asia, India, and America. Along with other plant families distinguished by their medicinal and therapeutic values, the Nepeta genus of Lameaceae remains relatively valuable. Hence, the phytochemicals of N. paulsenii Briq. were extracted using different plant parts, i.e., leaves, stem, roots, flowers, and the whole plant by using various solvents (ethanol, water, and ethyl acetate), obtaining 15 fractions. Each extract of dried plant material was analyzed by FT-IR and GC-MS to identify the chemical constituents. The cytotoxicity of each fraction was analyzed by MTT assay and mitochondrial membrane potential and nuclear condensation assays against lung cancer cells. Among the ethyl acetate and ethanolic extracts, the flowers showed the best results, with IC50 values of 51.57 μg/mL and 50.58 μg/mL, respectively. In contrast, among the water extracts of the various plant segments, the stem showed the best results, with an IC50 value of 123.80 μg/mL. 5-flourouracil was used as the standard drug, providing an IC50 value of 83.62 μg/mL. The Hoechst 33342 stain results indicated apoptotic features, i.e., chromatin dissolution and broken down, fragmented, and crescent-shaped nuclei. The ethanolic extracts of the flowers showed more pronounced apoptotic effects on the cells. The mitochondrial membrane potential indicated that rhodamine 123 fluorescence signals suppressed mitochondrial potential due to the treatment with the extracts. Again, the apoptotic index of the ethanolic extract of the flowers remained the highest. Hence it can be concluded that the flower part of N. paulsenii Briq. was found to be the most active against the A459 human lung cancer cell line

Nepeta paulsenii Briq. inhibits hepatic toxicity in albino rats: Phytochemical analysis and chemical profiling

Nepeta paulsenii is a less explored plant found in the South-Eastern hilly region of Pakistan. Local people consider it a medicinal plant. The protective effect of methanol extract of N. paulsenii leaves on carbon-tetrachloride (CCl4) tempted liver damage in male rats was assessed. Forty-eight rats were equally divided into 8 groups and various concentrations of extract + CCl4 were induced for 30 days. Crude methanolic extract of N. paulsenii plant was examined through phytochemical analyses and gas chromatograph coupled with mass spectrometre (GC–MS) before biological testing on albino rats. Phytochemical analysis of extract showed coumarins, flavonoids, terpenoids, saponins and betacyanins, while GC–MS results revealed the existence of several compounds belonging to diverse classes, responsible for the hepatoprotective attribute of N.paulsenii. CCl4 exposure substantially decreased the antioxidant enzymes activity while increased the thiobarbituric acid reactive substances and reactive oxygen species levels. A remarkable increase in the aspartate aminotransferase, alanine aminotransferase and alkaline phosphatase levels was observed in CCl4 treated rats. Comet-parameters were observed after CCl4 administration. N. paulsenii extract administration substantially improved the antioxidant enzyme activity, hepatic markers as well as comet parameters and reversed the CCl4 induced histopathological damages. The results revealed that N. paulsenii has therapeutic effects against CCl4-induced liver damages

Exploring the effect of Jasmonic Acid for Aphids control for improving the yield of Triticum aestivum varieties

Many biotic and abiotic factors influence the production of wheat (Triticum aestivum L.). Among biological agents, aphids are destructive pests effecting wheat yield drastically. This study was designed to evaluate the impact of foliar Jasmonic acid spray on aphid population as well as on plant growth during aphid infestation in two wheat varieties i.e., Borlaug-2015 and Zincol-2015. Plants are cultivated in pots and treated with jasmonic acid at concentrations of 0.1 and 1 mM (JA). The results revealed that length of shoot and roots decreased after aphid stress and was improved (21–24%) by JA spray. Photosynthetic pigments increased after applying the jasmonic acid spray compared to control plants. Jasmonic acid spray helped the plants to recover from aphid stress by enhanced production of antioxidant enzymes CAT (Catalase) (65–71%), SOD (Superoxide dismutase) (71–74%) and POD (Peroxidase) (61–65%). Consequent to improved defence system, plants treated with JA had fewer aphids as compared to control (60–73% reduction), 24 h after spray. The higher concentration of JA (1 mM) proved more effective as compared to 0.1 mM jasmonic acid. Moreover, Zincol-2015 appeared tolerant as compared to Borlaug-2015 against aphid infestation. The application of jasmonic acid as an exogenous foliar application showed an overall positive impact on the physiological and biochemical attributes of both varieties. It helps the plants to enhance resistance against the biotic stress and can be adopted as future alternative for aphid management. However, detailed studies regarding understanding of underlying molecular mechanisms are needed to optimize the mode for field application