scholarly journals A potential long-acting bictegravir loaded nano-drug delivery system for HIV-1 infection: A proof-of-concept study

2019 ◽  
Vol 167 ◽  
pp. 83-88 ◽  
Author(s):  
Subhra Mandal ◽  
Pavan Kumar Prathipati ◽  
Michael Belshan ◽  
Christopher J. Destache
2021 ◽  
Vol 8 ◽  
Author(s):  
Michael Klotsman ◽  
Christopher A. Adin ◽  
Wayne H. Anderson ◽  
Chen Gilor

Background: Glucagon-like peptide-1 (GLP-1) is an incretin hormone that plays an important role in glucose homeostasis and food intake. In people, GLP-1 receptor agonists (GLP-1RAs) are commonly used for the treatment of type 2 diabetes mellitus (DM) and obesity; however, non-adherence to injectable medications is common. OKV-119 is an investigational drug delivery system intended for subdermal implantation and delivery of the GLP-1RA exenatide for up to 6 months.Hypothesis/Objectives: Develop protocols for the subcutaneous (SC) insertion and removal of OKV-119 and to evaluate its tolerability, in vivo drug-releasing characteristics, and weight-loss effects in cats.Animals: Two cadaveric and 19 purpose-bred cats.Methods: In cadavers, OKV-119 insertion protocol and imaging were performed at three SC locations. The safety and tolerability of OKV-119 implants were assessed in a small (n = 4 cats) 62-day study. Weekly plasma exenatide concentrations and body weight were measured in a 42-day proof-of-concept study designed to evaluate OKV-119 prototypes implanted in cats (n = 15).Results: In anesthetized cats, the duration of insertion and removal procedures was 1–2 min. OKV-119 was easily identified on radiographs, and well-tolerated without any apparent implant site reactions. Following implantation, exanatide plasma concentrations were observed for up to 35 days. Plasma exenatide concentrations were correlated to weight loss.Conclusion and clinical importance: Our findings suggest that OKV-119 could be easily inserted and removed during a routine clinic visit and can be used to safely and effectively deliver exenatide. Future studies of OKV-119, configured to release exenatide for a longer extended months-long duration, are warranted to determine whether the combination of metabolic improvements and beneficial weight-loss, coupled with minimal impact on pet-owner's lifestyle, lead to improved outcomes for obese cats and feline DM patients.


Marine Drugs ◽  
2021 ◽  
Vol 19 (6) ◽  
pp. 345
Author(s):  
Ying Sun ◽  
Xiaoli Ma ◽  
Hao Hu

Marine biomass is a treasure trove of materials. Marine polysaccharides have the characteristics of biocompatibility, biodegradability, non-toxicity, low cost, and abundance. An enormous variety of polysaccharides can be extracted from marine organisms such as algae, crustaceans, and microorganisms. The most studied marine polysaccharides include chitin, chitosan, alginates, hyaluronic acid, fucoidan, carrageenan, agarose, and Ulva. Marine polysaccharides have a wide range of applications in the field of biomedical materials, such as drug delivery, tissue engineering, wound dressings, and sensors. The drug delivery system (DDS) can comprehensively control the distribution of drugs in the organism in space, time, and dosage, thereby increasing the utilization efficiency of drugs, reducing costs, and reducing toxic side effects. The nano-drug delivery system (NDDS), due to its small size, can function at the subcellular level in vivo. The marine polysaccharide-based DDS combines the advantages of polysaccharide materials and nanotechnology, and is suitable as a carrier for different pharmaceutical preparations. This review summarizes the advantages and drawbacks of using marine polysaccharides to construct the NDDS and describes the preparation methods and modification strategies of marine polysaccharide-based nanocarriers.


2018 ◽  
Vol 6 (7) ◽  
pp. 1011-1017 ◽  
Author(s):  
Tiantian Wu ◽  
Hai Huang ◽  
Yaping Sheng ◽  
Hongdong Shi ◽  
Yuanzeng Min ◽  
...  

The PEGylation of anti-EGFR nanobodies was achieved via a transglutaminase catalyzed reaction through a Q-tag. The nanobody tethered drug delivery system exhibits superior specificity to EGFR positive tumor cells.


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