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Background: Bioactive compounds obtained from natural sources like plants, algae, mushrooms and marine have become of utmost importance in the pharmaceutical, food and cosmetic industries. Many bioactive chemicals have been found to have health-promoting characteristics, including antioxidant, antidiabetic, antibacterial, and anticancer activities. Extraction of these bioactive chemicals from natural sources is difficult since they are present in extremely low concentrations inside the cell. Methods: The complete cropping of bioactive compounds from natural sources depends on several physicochemical parameters such as solvent, solvent concentration, temperature, pressure, time, etc., and they play a crucial role in determining the efficiency of extraction. Furthermore, these factors are not inherently connected to one another, but when they are combined, they change not just the extraction efficiency but also the process cost. As a result, the physicochemical parameters must be properly adjusted in order to increase the extraction efficiency as well as the biological characteristics of isolated molecules. Results: The article provides a thorough examination of several extraction strategies, as well as the mechanism and concepts that underpin them. Also, the review highlights the impact of various physicochemical parameters on the effective extraction of bioactive compounds from natural sources to meet the standards of industrial requirements. Conclusion: Many of the tests have been conducted at the laboratory level; as a result, recommendations for scaling up the extraction process have been provided in order to assess the performance of small-scale to large-scale industrial operations.

The main focus of present study is to optimize the extraction parameters for maximum yield of biomass, β-carotene and chlorophyll content and their antioxidants from Kappaphycus alvarezii by response surface methodology (RSM) along with adaptive neuro-fuzzy inference system (ANFIS). Central composite rotatable design of RSM was applied to optimize the effect of microwave-assisted extraction (MAE) parameters. In this way, four parameters, such as methanol concentration (X1: 65–80%), microwave power (X2: 15–20%), radiation induced temperature (X3: 45–60 °C) and radiation exposure time (X4: 7.5–15 min) at five levels were selected. Optimal conditions were found as X1 = 80%, X2 = 20%, X3 = 45 °C and X4 = 12.5–14.5 min, under this condition, % yield of biomass (y1) = 86.231–87.212%, β-carotene and chlorophyll content (y2) = 77.348–82.841 mg/gm, %DPPHsc (y3) = 69.362–72.768%, %ABTSsc (y4) = 66.282–70.621%, FRAP (y5) = 62.654–64.381 μg mol (Fe(II))/g has been obtained. Also, optimized values of MAE parameters were compared and verified with ANFIS. Further, the major bioactive compounds present in the optimally obtained extract of K. alvarezii was identified through FTIR, gas chromatography-mass spectrum and HPLC.

The following study was done to assess the glucose utilizing efficiency of Indoloquinoxaline derivative incorporated keratin nanoparticles (NPs) in 3T3-L1 adipocytes. Indoloquinoxaline derivative had wide range of biological activities including antidiabetic activity. In this view, Indoloquinoxaline moiety containing N, N-dimethyl (3-fluoro-6H-indolo [3,2-b] quinoxalin-6-yl) methanamine compound was designed and synthesized, and further it is incorporated into keratin nanoparticles. The formulated NPs, drug entrapment efficiency, releasing capacity, stability, and physicochemical properties were characterized by various spectral analyzer and obtained results of characterizations were confirmed the properties of NPs. The analysis of mechanism underlying the glucose utilization of NPs was examined through molecular docking with identified target, and observed in silico study reports shown strong interaction of NPs in the binding pockets of AMPK and PTP1B. Based on the in silico screening, the formulated NPs was performed for in vitro cellular viability and glucose uptake studies on 3T3-L1 adipocytes. Interestingly, 40 μg of NPs displayed 78.2 ± 2.76% cellular viability, and no cell death was observed at lower concentrations. Further, the concentration dependent glucose utilization was observed at different concentrations of NPs in 3T3-L1 adipocytes. The results of NPs (40 μg) on glucose utilization have revealed eminent result 58.56 ± 4.54% compared to that of Metformin (10 μM) and Insulin (10 μM). The identified results clearly indicated that Indoloquinoxaline derivative incorporated keratin NPs significantly increased glucose utilization efficiency and protect the cells against the insulin resistance.

Transdermal delivery offers opportunities for inventive, challenging and valuable research with patient benefits. However, the prominent challenge in designing transdermal drug delivery systems is to overcome the natural transport barrier of the skin, the stratum corneum. Several physical and chemical enhancement techniques have been investigated in the last decade to breach the skin barrier and assist the transport of macromolecules across skin. Recent technological advances in this field include novel combination strategies of penetration enhancement techniques, microneedle array designs, needle-free technologies, nanocarriers, metered dose and microstructured transdermal systems. The present review reports on recent advances in physical approaches towards enhanced transdermal penetration. Enhancement strategies comprehensively covered in this review emphasize the significant achievements gained through successful transdermal delivery of hydrophilic macromolecules, vaccines, proteins, peptides, oligonucleotides, fluorescent dyes and plasmid delivery. Some commercially available technologies for transdermal delivery have also been covered. These novel technologies hold immense potential to advance further into clinical practice and enable better therapeutic applications and prophylactic interventions for various diseases.

Aim: A novel series of N-nitroso-3-(substituted phenylimino)-indolin-2-one 3a-h was synthesized and tested for carcinogenic effects. Materials and Methods: The synthesized pyrazole derivatives' chemical structures were proved by means of their infra red (IR), proton nuclear magnetic resonance ( 1 H-NMR), and mass,and confirmed by elemental analyses. The carcinogenic activity was assessed by 3-(4,5dimethyl thiazole-2yl)-2,5-diphenyltetrazoliumbromide (MTT) cell-viability assay. Results: The results show that most of the synthesized compounds exhibit significant carcinogenic activities. Among the synthesized compounds, N-nitroso-3-(2,4-dinitrophenylimino)-indolin-2-one 3h exhibited the most potent carcinogenic activity. Conclusion: The structure-activity relationship (SAR) studies show that the nature as well as the position of the amine are important for deciding the activity profile of the indolin-2-one derivatives, which reiterates the need for further experimental investigations.