HER2 siRNA Facilitated Gene Silencing Coupled with Doxorubicin Delivery: A Dual Responsive Nanoplatform Abrogates Breast Cancer.

The present study investigated the concurrent delivery of antineoplastic drug, doxorubicin, and HER2 siRNA through a targeted theranostic metallic gold nanoparticle designed using polysaccharide, PSP001. The as-synthesized HsiRNA@PGD NPs were characterized in terms of structural, functional, physicochemical, and biological properties. HsiRNA@PGD NPs exposed adequate hydrodynamic size, considerable ζ potential, and excellent drug/siRNA loading and encapsulation efficiency. Meticulous exploration of the biocompatible dual-targeted nanoconjugate exhibited an appealing biocompatibility and pH-sensitive cargo release kinetics, indicating its safety for use in clinics. HsiRNA@PGD NPs deciphered competent cancer cell internalization, enhanced cytotoxicity mediated via the induction of apoptosis, and excellent downregulation of the overexpressing target HER2 gene. Further in vivo explorations in the SKBR3 xenograft breast tumor model revealed the appealing tumor reduction properties, selective accumulation in the tumor site followed by significant suppression of the HER2 gene which contributed to the exclusive abrogation of breast tumor mass by the HsiRNA@PGD NPs. Compared to free drugs or the monotherapy constructs, the dual delivery approach produced a synergistic suppression of breast tumors both in vitro and in vivo. Hence the drawings from these findings implicate that the as-synthesized HsiRNA@PGD NPs could offer a promising platform for chemo-RNAi combinational breast cancer therapy.

Determinants of Patient Delay among Women with Carcinoma Breast.

OBJECTIVE: The aim of the study was to estimate the delay in seeking treatment among women with carcinoma of breast and determine the factors associated with delay. METHODS: This was a hospital-based cross-sectional survey among 330 women attending the radiotherapy department of a tertiary care center in South India. Socio-clinical variables, duration of delay and reasons for the delay were collected by semi-structured interviews. Patient delay was assessed in categories of appraisal and illness time and system delay in diagnosis and treatment time. The probability of associated factors for the delay was estimated by logistic regression analysis. RESULTS: The mean age of the patients was 54.7 yrs. 86.8% of participants had delays in seeking treatment. 33.5% had a presentation/patient-related delay with three months cut-off and 12.4% had a system delay with a one-month cut-off. In multivariate analysis, history of previous breast lump OR= 2.69 (95% CI 1.06-6.83), knowledge regarding breast cancer OR=3.96 (95% CI 1.37-11.42), referral hospital OR=4.91 (95% CI 1.66-14.57), type of medical doctor visited first OR=4.43(95% CI 2.06-9.53) and appraisal time OR=2.01(95% CI 1.06- 3.81) were statistically significant. CONCLUSION: Patient delay is significant and there are preventable factors contributing to the delay in seeking treatment for breast cancer.

Electrospun polysaccharide scaffolds: wound healing and stem cell differentiation.

Irrespective of the labyrinth of fastidiously woven artificial scaffolds, the lack of biocompatibility hampers effective clinical translation, which is the definitive purpose of any biomedical system or device. Hence, the current exploration deals with the fabrication of scaffolds with enhanced bioactivities for wound healing. The methodology used for the fabrication of the scaffolds was electrospinning of the polysaccharide, which is isolated from tamarind seed kernel using the electrospinning process. To improve the antimicrobial activity of the scaffolds, in-house synthesized silver nanoparticles were added to the scaffolds. Wound healing and antimicrobial efficiency of the scaffolds were established in murine models. An insight into the wound healing mechanism was also analyzed using differentiation screening of stem cells grown on scaffolds. The results showed that newly synthesized scaffolds presented excellent wound healing ability along with antimicrobial activity. Furthermore, detailed toxicological evaluations through the histopathology and collagen staining wound sections, the probability of any off-target effects were also ruled out. Differentiation screening showed that adipogenesis was more prominent in cells attached to the scaffolds and markers of adipogenesis were strongly expressed in fluorescent microscopy. Thus we hope that the scaffolds mediate stem cell differentiation in wounds and promote a progressive healing response. Results thus obtained were encouraging and further studies need to embark on to establish the combined role in all aspects studied here.