Pharmaceutical technology is drastically developing to enhance the efficacy and safety of drug therapy. Pulsatile delivery systems, in turn, gained attraction for their ability to deliver the right drug amount to the right body site, at the right time which is advantageous over conventional dosage forms. Their use is associated with increased patient compliance and allows on-demand drug delivery as well as customizable therapy. Recent technologies have been implemented to further develop pulsatile delivery systems for more precise determination of the dosage timing and duration as well as the location of drug release. Great interests are directed towards externally regulated pulsatile release systems which will be the focus of this review. The recent advances will be highlighted in remotely controlled delivery systems. This includes electro responsive, light-responsive, ultrasound responsive, and magnetically induced pulsatile systems as well as wirelessly controlled implantable systems. The current status of these technologies will be discussed as well as the recent investigations and future applications.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9022360 | PMC |
http://dx.doi.org/10.4103/japtr.japtr_330_21 | DOI Listing |
Trends Microbiol
March 2025
Department of Microbiology, University of Washington, Seattle, WA, USA; Howard Hughes Medical Institute, University of Washington, Seattle, WA, USA; Microbial Interactions and Microbiome Center, University of Washington, Seattle, WA, USA. Electronic address:
The type VI secretion system mediates interbacterial antagonism between Gram-negative bacteria through delivery of toxic effector proteins. A recent comprehensive genomic analysis by Habich et al. reveals interesting features of the evolution of T6SSs and their corresponding effectors in Pseudomonas aeruginosa, raising questions about functional specialization of the system.
View Article and Find Full Text PDFTraffic
January 2025
Center for Complex Biological Systems, University of California, Irvine, Irvine, California, USA.
The delivery of intracellular cargoes by kinesins is modulated at scales ranging from the geometry of the microtubule networks down to interactions with individual tubulins and their code. The complexity of the tubulin code and the difficulty in directly observing motor-tubulin interactions have hindered progress in pinpointing the precise mechanisms by which kinesin's function is modulated. As one such example, past experiments show that cleaving tubulin C-terminal tails (CTTs) lowers kinesin-1's processivity and velocity on microtubules, but how these CTTs intertwine with kinesin's processive cycle remains unclear.
View Article and Find Full Text PDFZhong Nan Da Xue Xue Bao Yi Xue Ban
October 2024
Department of Pharmaceutical Engineering, Chemistry and Chemical Engineering, Central South University, Changsha 410083.
Objectives: Small interfering RNA (siRNA) can silence disease-related genes through sequence-specific RNA interference (RNAi). Cationic lipid-based liposomes effectively deliver nucleic acids into the cytoplasm but often exhibit significant toxicity. This study aims to synthesize a novel ionizable lipid, Nε-laruoyl-lysine amide (LKA), from natural amino acids, constructed LKA-based liposomes, and perform physicochemical characterization and cell-based experiments to systematically evaluate the potential of these ionizable lipid-based liposomes for nucleic acid delivery.
View Article and Find Full Text PDFObjectives: This study aims to explore the perceptions of patients affected by COVID-19 and their families regarding the challenges faced, coping strategies used and lessons learnt in Pakistan.
Design: A qualitative exploratory descriptive approach was used to explore the real-time experiences of the participants.
Setting: The study was carried out in a tertiary care hospital in Karachi, Pakistan.
Endoscopy
December 2025
Gastroenterology, Kakogawa Central City Hospital, Kakogawa, Japan.
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