Venkatesan Kotteeswaran’s research while affiliated with SRM Institute of Science and Technology and other places

The field of wound healing is currently experiencing a ground-breaking transformation with the introduction of nanofiber technology. This groundbreaking discovery has the potential to revolutionize regenerative medicine and tissue engineering worldwide, effectively meeting the growing need for innovative and affordable healthcare solutions. This comprehensive review explores the evolution and utilization of nanofibers to enhance wound healing. Nanofibers, known for their ability to mimic the extracellular matrix of human tissue, play a crucial role in facilitating cell growth and wound repair. The review explores sophisticated techniques like electrospinning and the integration of bioactive agents such as antibiotics and growth factors with nanofibers. It emphasizes on the precision with which these nanofibers are customized to address specific therapeutic requirements. Additionally, the review sheds light on the use of both natural and synthetic polymers in crafting biocompatible nanofibers, which significantly reduces healing time while ensuring optimal aesthetic recovery, meeting the expectations of patients with minimal scarring. It emphasizes the synergy of expertise from materials science, biology,and clinical practices in propelling nanofiber-based therapies from the laboratory to the forefront of clinical care. Through this succinct overview, we aim to underscore the immense potential of nanofibers in transforming wound care. We are offering a glimpse into a future where effective and efficient healing is within reach, marking a remarkable leap forward in the global quest for advanced healthcare solutions.

Nanobiotechnology is an evolving domain of scientific exploration connected with synthesis and mechanism of nanoparticles in biological systems. Silver nanoparticles have gained utmost popularity because of its characteristics like thermal conductivity, chemical stability, and high catalytic activities. It also has various advantages like being a drug carrier, transmembrane deliver and potential for controlled intracellular drug-delivery. The current study deals with fabrication of nanoparticles which are formed from biologically reduced silver, followed by its characterization. In addition, anticancer activity was investigated using in-vitro cell model. The synthesis was confirmed from the change in color to brown from golden yellow and also from absorbance peak obtained at 430nm in UV-Vis spectrophotometry. The obtained nanoparticle had an average size of about 150.1 nm and its FTIR peaks suggested the presence of flavonoids and polyphenols. XRD analysis exhibited peaks in the 2θ range of 227.72o, 32.29o, 38.76o, 43.17o, 54.47o, 64.04o and 77.75o, is confirming its crystallographic nature. Further, anticancer activity of silver nanoparticles was tested through cell proliferation assays, Lactate Dehydrogenase assays, and apoptosis assay using Hoechst/PI staining, wherein there is clear reduction in cell’s proliferation, viability, and LDH release, followed by increased dead cells as a result of treatment.

A lipid-polymer hybrid nanoparticle (LPHNP) is a drug delivery vehicle specifically designed for incorporating hydrophobic lipids and hydrophilic polymers into a single system. These hybrid nanoparticles are synthesized from a variety of methods including one-step or a two –step approach based on the desired structure of lipids and polymers construct themselves into an integrated delivery agent through self assembly. This hybrid system offers more advantages than their equivalent individual nanoparticle such as the ability to tune the particle size, loading wide range of drugs into them, extending circulation time, biocompatibility, controlled and sustained release with in vitro stability. The LPHNP extends their role to co-deliver two drugs in combination, nucleic acids, peptides, active and passive targeted drug deliveries apart from usual single drug delivery. This review summarizes the scope of the hybrid system bringing out different types, various modes of synthesis and the factors involved in designing an efficient system along with their applications in cancer therapeutics.

Drug delivery is a method of delivering drug to the patients in a way which increases the concentration of drug to the relevant site by directing the drug to the specific site of action. Polymeric drug delivery systems are mostly preferred to take the drug to the specific site of action and achieve the therapeutic effect. Among different types of biocompatible polymers, carbohydrate-based polymers or polysaccharides are the most common natural polymers with complex structures consisting of long chains of monosaccharide or disaccharide units bound by glycosidic linkages. One such polymer is chitosan which is used in drug delivery. Chitosan’s appealing properties, especially of natural origin, may mediate the protection against degradation of the biologically active substance, control the release of the drug, boost the absorption, increase the physiological action and result in a consequent reduction in the rate of administration. Another advantage of using chitosan is its chemical structure that could be modified easily which makes chitosan derivatives used for different applications. The main objective is to provide an overview on chitosan and its derivatives applications in drug delivery.

Methotrexate is one of the most popular and safe anti-inflammatory drugs which is an antifolate-type antimetabolite and is used as an anticancer drug. In this study, oppositely charged chitosan and fucoidan have been non-covalently bonded using their electrostatic interactions with the methotrexate drug loaded into these nanoparticles. Fucoidan is obtained from marine algae which are composed of l-fucose and sulfate groups in various types of brown seaweeds; whereas chitosan is a naturally occurring biopolymer obtained through the N-deacetylation of chitin. Depending on the fucoidan / chitosan (F / C) weight ratio, three distinct nanoparticles (1F / 1C; 3F / 1C; 5F / 1C) are synthesized and characterized. Nanoparticles were prepared using cross linkers EDC and NHS at a constant pH to reduce the conjugate size. The prepared conjugates were characterized for their size and zeta potential using DLS analysis and the functional groups were analysed using FTIR. DLS results proclaimed that there was size reduction in particle size with cross linker and without the drug methotrexate. The 5:1 F/C nanoparticles was seen to be 441.5 nm, the difference being considerable larger in the 5:1 formulation. Hence for further analysis 5:1 F/C nanoparticles were preferred. Maximum entrapment efficiency was observed in 5:1 F/C nanoparticle with and without cross linkers. To understand the structural morphology of nanoparticles electromagnetic magnification like SEM and TEM were taken in account.

Plants contain different important phytochemicals that can be used as a potential treatment for various ailments including cancer. The green synthesis of silver nanoparticles from the extract of different plant parts has gained a wide range of engrossment among the researchers due to its unique optical and structural property. The aim of this study is green synthesis of silver nanoparticles from the aqueous leaf extract of pomegranate (Punica granatum) and to investigate its anticancer activity on human cervical cancer cells (HeLa). The synthesis of silver nanoparticle was depicted by the colour change from golden yellowish to dark brownish, UV-visible spectral analysis gave a characteristic surface plasmon absorption peak at . Further morphological characterization was done by Zeta potential where the size analysis was depicted to be 46.1 nm and zeta potential as . Fourier transform infrared spectroscopy (FTIR) inferred 3 intense sharp peaks at , , , confirmed the presence of flavonoids and polyphenols. The scanning electron microscopy (SEM) analysis with energy diffraction spectroscopy (EDS) confirmed the presence of silver nanoparticles with size ranged from to . X-ray diffraction (XRD) confirmed the crystallographic nature of silver. The cell proliferation activity of nanoparticles was tested by 3, −4, 5 dimethylthiazol-2,5 diphenyl tetrazolium bromide (MTT) assay where the inhibitory concentration () was found at inhibiting of HeLa cell line. The anticancer activity of nanoparticles was determined by lactate dehydrogenase (LDH) assay where showed of cytotoxicity. Furthermore, the anticancer property of nanoparticles was confirmed by the DNA fragmentation assay.

Curcumin, a natural polyphenolic compound and it is isolated from the rhizome of Curcuma longa, have been reported to possess anticancer effect against stage I and II colon cancer. However, the effect of curcumin on colon cancer at Dukes' type C metastatic stage III remains still unclear. In the present study, we have investigated the anticancer effects of curcumin on p53 mutated COLO 320DM human colon adenocarcinoma cells derived from Dukes' type C metastatic stage. The cellular viability and proliferation were assessed by trypan blue exclusion assay and MTT assay, respectively. The cytotoxicity effect was examined by lactate dehydrogenase (LDH) cytotoxicity assay. Apoptosis was analyzed by DNA fragmentation analysis, Hoechst and propidium iodide double fluorescent staining and confocal microscopy analysis. Cell cycle distribution was performed by flow cytometry analysis. Here we have observed that curcumin treatment significantly inhibited the cellular viability and proliferation potential of p53 mutated COLO 320DM cells in a dose- and time-dependent manner. In addition, curcumin treatment showed no cytotoxic effects to the COLO 320DM cells. DNA fragmentation analysis, Hoechst and propidium iodide double fluorescent staining and confocal microscopy analysis revealed that curcumin treatment induced apoptosis in COLO 320DM cells. Furthermore, curcumin caused cell cycle arrest at the G1 phase, decreased the cell population in the S phase and induced apoptosis in COLO 320DM colon adenocarcinoma cells. Together, these data suggest that curcumin exerts anticancer effects and induces apoptosis in p53 mutated COLO 320DM human colon adenocarcinoma cells derived from Dukes' type C metastatic stage.