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Not AvailableXanthomonas campestris pv. campestris is a causative agent of black rot disease of cruciferous crops. A whole-genome sequence of any race of X. campestris pv. campestris has not been reported from India. The isolate Xcc-C7, race 4, of X. campestris pv. campestris was isolated from cabbage (Brassica oleracea var. capitata) from Bengaluru, in the southern parts of India. Whole-genome sequence data were generated by the next-generation sequencing-based single-molecule real-time sequencing (SMRT) techniques. This study will improve our knowledge of genomic diversity in X. campestris pv. campestris and pave the way for research on host–pathogen interactions (crucifer crops–X. campestris pv. campestris) to develop resistance in cultivated Brassicaceae crops.Not Availabl

Cluster of Differentiation 44 Targeted Hyaluronic Acid Based Nanoparticles for MDR1 siRNA Delivery to Overcome Drug Resistance in Ovarian Cancer

PURPOSE: Approaches for the synthesis of biomaterials to facilitate the delivery of “biologics” is a major area of research in cancer therapy. Here we designed and characterized a hyaluronic acid (HA) based self-assembling nanoparticles that can target CD44 receptors overexpressed on multidrug resistance (MDR) ovarian cancer. The nanoparticle system is composed of HA-poly(ethyleneimine)/HA-poly(ethylene glycol) (HA-PEI/HA-PEG) designed to deliver MDR1 siRNA for the treatment of MDR in an ovarian cancer model. METHODS: HA-PEI/HA-PEG nanoparticles were synthesized and characterized, then the cellular uptake and knockdown efficiency of HA-PEI/HA-PEG/MDR1 siRNA nanoparticles was further determined. A human xenograft MDR ovarian cancer model was established to evaluate the effects of the combination of HA-PEI/HA-PEG/MDR1 siRNA nanoparticles and paclitaxel on MDR tumor growth. RESULTS: Our results demonstrated that HA-PEI/HA-PEG nanoparticles successfully targeted CD44 and delivered MDR1 siRNA into OVCAR8TR (established paclitaxel resistant) tumors. Additionally, HA-PEI/HA-PEG nanoparticles loaded with MDR1 siRNA efficiently down-regulated the expression of MDR1 and P-glycoprotein (Pgp), inhibited the functional activity of Pgp, and subsequently increased cell sensitivity to paclitaxel. HA-PEI/HA-PEG/MDR1 siRNA nanoparticle therapy followed by paclitaxel treatment inhibited tumor growth in MDR ovarian cancer mouse models. CONCLUSIONS: These findings suggest that this CD44 targeted HA-PEI/HA-PEG nanoparticle platform may be a clinicaly relevant gene delivery system for systemic siRNA-based anticancer therapeutics for the treatment of MDR cancers