Biodistribution

Bio-inspired drug delivery systems are a relatively new area of development in the field of pharmaceutical science that applies the principles of nature to design a new system that will improve efficacy and safety in therapy. This is a review of recent developments in bio-inspired delivery platforms and, in particular, animal-based preclinical studies. Several biomimetic nanoparticles such as cell membrane-coated, exosome-mimetrics, virus-inspired, and biomimetic polymers are critically analyzed. The areas of focus of this review include the methodology of fabrication, targeting mechanism, biodistribution studies and therapeutic studies in animal models. The major findings are that bio-inspired systems are much better in terms of drug stability, circulation time, and tissue specificity as compared to systemic toxicity reduction. Even though such results are promising, they are subject to such difficulties as scalability, reproducibility, and translational reliability. This review presents the contemporary developments, limitations, and future research directions to clinical translation.

Syphilis is a chronic and multi-stage infectious disease caused by Treponema pallidum, which has a rapid spread, resistance to immune responses, and chronic infection. This review is a synthesis of animal evidence to study the pathogenesis, clinical synergies, diagnostic plans, treatment plans, and epidemiological implications of the disease. The use of animal models, especially rabbits, has been critical in understanding the interaction of the host and pathogen, development of lesions, and immunological reactions. This research indicates the relative performance of the traditional and reverse screening algorithm, which shows that reverse screening has a better sensitivity during both early and latent periods, whereas the traditional approach is useful in monitoring active infection. The development of molecular diagnostics, particularly PCR and immunoassays, has improved early diagnosis and evaluation of the disease, whereas penicillin remains the most effective treatment despite the emerging resistance issues in other treatments. Additionally, experimental epidemiological research adds to the knowledge on the dynamics and persistence of transmission. Nevertheless, animal model limitations and issues with vaccine development because of immune evasion remain a major problem. The review highlights the necessity of a better experimental model, combined diagnostic, and novel treatment and vaccine options to improve the management of the disease and future research outcomes.