Modulation of oxidative stress mediators in the liver of adjuvant induced arthritic rats by Nyctanthes arbor tristis

Parametric optimization, Polyphenol profiling and Bioefficacy of Bacopa monnieri (L.) Pennell phytoextract against multi-drug resistant (MDR) foodborne bacterial pathogens

Nowadays, antimicrobial resistance and foodborne burden are a prevalent global concern for human health and sustainable development. In this context, this study aimed to investigate the effect of Bacopa monnieri (L.) Pennell extract against pathogenic foodborne bacteria (Escherichia coli, Staphylococcus aureus, and Listeria monocytogenes). Antibiogram phenotypic analysis on these strains revealed a high multiple antibiotic resistance (MAR) index, which varies from 0.5 to 0.75, and antibiotic resistance of 50-80 per cent. Polarity-wise extracted ethanolic extract (BM04-ET) showed potent anti-listerial (22.33 ± 1.15 mm) and anti-escherichial (20.33 ± 0.58 mm) potential with strong bactericidal activity against tested strains. In vitro phytochemical experiments confirmed a very high content of phenols (214.2 ± 1.79 mg/g and flavonoids (61.01 ± 0.48 mg/g) in BM04-ET; further confirmation via UPLC elucidated the abundance of natural bioactive flavanonol, i.e., dihydroquercetin (224.932 μg/mL), possibly imparting bactericidal property to extract. Optimization studies identifies the best parametric combination with pH value of 6.8, temperature 37 °C, and incubation period of 24 h for the antibacterial effect of BM04-ET. Due to high polyphenolic content and superior antibacterial excellence, the study suggested B. monnieri ethanolic extract could be used as a choice in combating foodborne infection, and further research exploration on key antibacterial components turn out to be a remarkable milestone in food and medicinal industries.

Assessment of antioxidant and antibacterial efficacy of some indigenous vegetables consumed by the Manipuri community in Sylhet, Bangladesh

The rapid dietary changes experienced by indigenous people worldwide threaten the use of traditional foods, which are often undervalued. This study focused on evaluating the antioxidant and antibacterial efficacy of five vegetables typically consumed by the Manipuri ethnic groups in the Sylhet region of Bangladesh: Yongchak seed (Parkia speciosa), Telikadam seed (Leucaena leucocephala), Phakphai leaf (Persicaria odorata), Sheuli leaf (Nyctanthes arbor-tristis), and bamboo shoot (Bambusa spp.). The samples were dried and powdered to assess the antioxidant activity through total phenolic content (TPC), total flavonoid content (TFC), total tannin content (TTC), and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity. Antibacterial efficacy was determined by measuring the zone of inhibition (ZOI), minimum inhibitory concentration (MIC), and minimum bactericidal concentration (MBC). Leafy vegetables exhibited higher TPC, TFC, and TTC than seeds and shoots, with N. arbor-tristis leaf showing the highest TPC (99.16 ± 2.07 mg GAE/g DW) and P. odorata leaf exhibiting the highest TFC (9.19 ± 0.7 mg QE/g) and TTC (3.59 ± 0.26 mg TAE/g). However, Bambusa spp. shoot extract showed the highest antioxidant potential (IC50: 1.66 ± 0.05 mg/mL). All samples exhibited higher ZOI against gram-positive bacteria (Bacillus spp. and Staphylococcus spp.), ranging from 10 ± 2.65 to 19.33 ± 2.08 mm. L. leucocephala seed extract showed the highest antibacterial activity against both the tested gram-positive bacteria with a MIC of 15.6 mg/mL. Conversely, the P. odorata leaf extract exerted the strongest antibacterial effect against gram-negative bacteria, with the lowest MIC values for Klebsiella spp. (31.25 mg/mL) and Escheria coli (62.5 mg/mL). The findings of this investigation suggest that the selected indigenous vegetables could be valuable sources of phytochemicals with potential antioxidant and antibacterial activities. Incorporating and promoting these traditional foods into the diet may improve food security, dietary diversity, and public health in Bangladesh.

Protective effects of fucoidan against 4-nitroquinolin-1-oxide provoked genetic damage in mouse bone marrow cells

Fucoidan is a unique bioactive and dietary polymer enriched mainly in the cell wall matrix of the brown seaweeds. This present study was intended to reveal the antigenotoxicity effect of fucoidan on 4-nitroquinolin-1-oxide (4-NQO) induced genetics damage and apoptosis in mice bone marrow cells. The 4-NQO caused genetic damages in the form of chromosome/chromatic breakage was estimated by micronuclei assay whereas apoptosis by annexin-V FITC kit and DNA damage by comet assay kit. In addition, oxidative damage in terms of plasma lipid peroxidation (LPO) and 8-OHdG was also estimated. In the experimental regime, six groups with each in five either sex of mice were used. Fucoidan constituted (50,100,200 mg/kg bwt) by orally for 5 days consequently and on 6th day, 4-NQO was administered (7.5 mg/kg bwt) by i.p. The results clearly show that negative control (H2O) and fucoidan alone constituted mice were not exhibited significant effect on LPO, genetic damages whereas positive control group (4-NQO 7.5 mg/kg bwt, i.p.) showed significant effect on genetic damage by showing increased level of LPO (6.25 vs 1.3 μM MDA), 8-OHdG (12 vs 4%), micronuclei about six-fold, 5-fold of comet, and 4-fold of apoptosis when compared with negative control, 11.6 ± 2.07, 5.00 ± 1.58, and 4.14 ± 0.65 respectively. Fucoidan pretreatment significantly protected the 4-NQO-induced genetic damage by 77% decreased level of micronuclei and 96% comet at dose of 200 mg/kg bwt over the positive control whereas LPO, 8-OHdG, and apoptosis were restored as equal to negative control. This study found as fucoidan possessing significant antigenotoxicity property by protecting 4-NQO-induced genetic damage in mice bone marrow cells as dose dependent manner suggest as valuable food supplements and medicine for mankind from environmental toxicants.

Facile functionalization of Teriflunomide-loaded nanoliposomes with Chondroitin sulphate for the treatment of Rheumatoid arthritis

This research aims to coat Teriflunomide (TEF) loaded conventional nanoliposomes (CON-TEF-LIPO) with Chondroitin sulphate (CS) to produce CS-TEF-LIPO for the effective treatment of Rheumatoid arthritis (RA). Both CON-TEF-LIPO and CS-TEF-LIPO were produced, characterized and evaluated for their active targeting potential towards CD44 receptors. Cell cytotoxicity, cell viability and intracellular uptake study on differentiated U937 and MG-63 cells demonstrated the active targeting of CS-TEF-LIPO towards CD44 receptors. Furthermore, in vivo pharmacodynamic, biochemical, radiological and histopathological studies performed in adjuvant induced arthritic (AIA) rat model showed a significant (P < 0.05) reduction in inflammation in arthritic rat paw in CS-TEF-LIPO group compared to TEF and CON-TEF-LIPO groups. Moreover, liver toxicity study revealed that CS-TEF-LIPO showed no signs of toxicity and biodistribution study revealed the accumulation of CS-TEF-LIPO in synovial region of arthritic rat. Taken together, results suggest that CS-TEF-LIPO could provide a new insight for an effective treatment of RA.