Introduction and Aim: In 21stcentury, nanomedicine has turned out to be an emergent modulus operation for the diagnosis and treatment of cancer. The current study includes the optimization and green synthesis of zinc oxide nanoparticles from the leaves of Garcinia cambogia and interpretation of its antioxidant and anticancer activity.   Materials and Methods: Synthesized ZnO NPs were investigated by UV–vis, FTIR, XRD, SEM, EDX, HR-TEM, SAED, particle size distribution and DLS analysis. Furthermore, different antioxidant assays were conducted for evaluating the antioxidant activity of (ZnO NPs) and its anticancer activity using (A498) cell lines along with non-cancerous (HEK-293) cell line using MTT assay and XTT assay.   Results: The UV–visible spectrum showed an absorption peak at 277 nm that reflects surface plasmon resonance (SPR) ZnONPs. The presence of various functional groups was confirmed by FTIR analysis. XRD patterns indicated that the ZnO NPs had a single-phase nature with the wurtzite structure. SEM, TEM pictures confirmed the size and shape of synthesized Nanoparticles ranges of 11–32 nm and mostly hexagonal forms. The Zeta potential value of 57.9 mV revealed the surface charge of green synthesized ZnONPs. The cytotoxicity of the ZnO NPs with various concentrations (6.25 to 200 µg/mL) was measured in (A498) cell lines along with non-cancerous (HEK-293) cell line. After the exposure, to MTT and XTT assay, cellular morphology studies showed that the cancer cell viability decreased with increasing ZnO NP concentration.   Conclusion: The synthesized ZnONPs via a green synthetic route could be developed as anti-cancer agent against cancer cells.

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Introduction and Aim: Plants from Anacardiaceae family are used in indigenous system of medicine for their anti-arthritic, antibacterial and antioxidant properties. Among them, Holigarna species are widely known as toxic members of Anacardeaceae family which are endemic to Western Ghats. It is commonly known as allergic plant which causes contact dermatitis if contacted. However, young leaves and seeds are used against haemorrhoids, obesity, and cancer and skin diseases. Despite the claims and the use of Holigarna ferrugenia, Holigarna nigra and Holigarna grahamii for the management of skin diseases in traditional medicine, little is known and documented so the aim of the study was to explore the in vitro antioxidant activity and to analyse qualitative and quantitative of phytochemicals along with their physicochemical properties. Materials and Methods: Physicochemical parameters such as moisture, pH, total ash, acid-insoluble ash, and elemental values were determined. Qualitative and quantitative analysis were carried out along with different antioxidant assays for evaluating the antioxidant activity of aqueous crude extract of H. ferrugenia, H. nigra and H. grahamii. Results: Physicochemical analysis revealed the presence of trace elements. Preliminary phytochemical analysis revealed the presence of tannins, alkaloids, flavonoids, phenols, saponins and steroids in aqueous crude extract of H. ferrugenia, H. nigra and H. grahamii. The free radical scavenging activity of all plants exhibited better antioxidant properties. Conclusion: The results indicated that the leaves contain an appreciable number of bioactive compounds and presence of these phytochemicals, especially the phenols and flavonoids could be the reason behind the use of both plants in ethno-medicine for the management of various ailments.

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