6 research outputs found
Renal Clearable New NIR Probe::Precise Quantification of Albumin in Biofluids and Fatty Liver Disease State Identification through Tissue Specific High Contrast Imaging in Vivo
Three-Step Purification and Characterization of Organic Solvent-Tolerant and Alkali-Thermo-Tolerant Xylanase from <i>Bacillus paramycoides</i> T4 [MN370035]
In the present study, an extracellular alkali-thermo-tolerant xylanase from Bacillus paramycoides was produced in the presence of an organic solvent. The enzyme was purified by ammonium sulphate precipitation, gel filtration, and ion exchange chromatography, with an overall recovery of 25.9%. The purified enzyme hada 70 kDa molecular weight (MW) confirmed by SDS-PAGE gel analysis. The maximum enzyme activity was reported at 55 °C and pH 7.0. Xylanase activity and stability were improved in the presence of 30% (v/v) n-dodecane, iso-octane, n-decane, and cyclohexane (7 days). The enzyme activity was improved by Co2+, EDTA, and Triton-X-100 while vigorously repressed by Hg2+ and Cu2+. The purified enzyme showed 1.473 mg/mL Km and 654.017 µg/mL/min Vmax values. The distinctive assets of the isolate verified the potential application in the field of biomass conversion into fuel and other industrial processes. Organic solvent-tolerant xylanases can be used for concurrent saccharification and bioethanol production, the amplification of intoxicating beverages, and the fermenting industry
Centchroman regulates breast cancer angiogenesis via inhibition of HIF-1α/VEGFR2 signalling axis
Click Biotinylation of PLGA Template for Biotin Receptor Oriented Delivery of Doxorubicin Hydrochloride in 4T1 Cell-Induced Breast Cancer
PLGA was functionalized with PEG
and biotin using click chemistry
to generate a biotin receptor targeted copolymer (biotinylated–PEG-PLGA)
which in turn was used to fabricate ultrafine nanoparticles (BPNP)
of doxorubicin hydrochloride (DOX) for effective delivery in 4T1 cell
induced breast cancer. However, adequate entrapment of a hydrophilic
bioactive like DOX in a hydrophobic polymer system made of PLGA is
not usually possible. We therefore modified a conventional W/O/W emulsion
method by utilizing NH<sub>4</sub>Cl in the external phase to constrain
DOX in dissolved polymer phase by suppressing DOX’s inherent
aqueous solubility as per common ion effect. This resulted in over
8-fold enhancement in entrapment efficiency of DOX inside BPNP, which
otherwise is highly susceptible to leakage due to its relatively high
aqueous solubility. TEM and DLS established BPNP to be sized below
100 nm, storage stability studies showed that BPNP were stable for
one month at 4 °C, and <i>in vitro</i> release suggested
significant control in drug release. Extensive <i>in vitro</i> and <i>in vivo</i> studies were conducted to propound
anticancer and antiproliferative activity of BPNP. Plasma and tissue
distribution study supplemented by pertinent <i>in vivo</i> fluorescence imaging mapped the exact fate of DOX contained inside
BPNP once it was administered intravenously. A comparative safety
profile via acute toxicity studies in mice was also generated to out
rightly establish usefulness of BPNP. Results suggest that BPNP
substantially enhance anticancer activity of DOX while simultaneously
mitigating its toxic potential due to altered spatial and temporal
presentation of drug and consequently deserve further allometric iteration