Notes
![]() ![]() Notes - notes.io |
Olmesartan medoxomil (OLM) an antihypertensive molecule with poor solubility and poor bioavailability (26% when taken orally) was selected as a model drug. Herein, rationale development of amorphous solid dispersion with hot-melt extrusion of poorly bioavailable OLM was carried out with the aid of quality by design (QbD), in-silico, in-vitro, and in-vivo evaluations. Polymer selection commenced with the selection of thermoplastic water-soluble polymers with the compatible processing temperature window as per the thermal behavior of OLM. Molecular dynamics (MD) simulations as well assisted in the selection of a carrier. Promising dissolution enhancement was observed with the help of Kollidon VA-64 (VA-64) as a carrier. Optimization of the formulation was executed using the QbD approach with design of experiment as a statistical optimization tool. Interactions between VA-64 and OLM on the atomic level were studied with the help of atomistic MD simulations. Characterization of the optimized extrudates were carried out with scanning electron microscopy, atomic force microscopy, differential scanning calorimetry, thermogravimetric analysis, Fourier transforms infrared spectroscopy, powder X-ray diffraction, in-vitro dissolution study, and in-vivo pharmacokinetic studies. Molecular-level mixing of OLM with VA-64 resulted into glass solution formation which rapidly dissolves (28 times in-vitro dissolution enhancement) in GI tract fluids and instantly gets absorbed into blood circulation. In-vivo pharmacokinetic studies performed in Sprague-Dawley rats reflected superior bioavailability (201.60%) with a significant increase in the Cmax with short Tmax through amorphization of OLM. The in-silico results were in agreement with the observed results of in-vitro dissolution studies and in-vivo pharmacokinetic study.Trust relations in the health services have changed from asymmetrical paternalism to symmetrical autonomy-based participation, according to a common account. The promises of personalized medicine emphasizing empowerment of the individual through active participation in managing her health, disease and well-being, is characteristic of symmetrical trust. In the influential Kantian account of autonomy, active participation in management of own health is not only an opportunity, but an obligation. Personalized medicine is made possible by the digitalization of medicine with an ensuing increased tailoring of diagnostics, treatment and prevention to the individual. The ideal is to increase wellness by minimizing the layer of interpretation and translation between relevant health information and the patient or user. Arguably, this opens for a new level of autonomy through increased participation in treatment and prevention, and by that, increased empowerment of the individual. However, the empirical realities reveal a more complicated landscape disturbed by information 'noise' and involving a number of complementary areas of expertise and technologies, hiding the source and logic of data interpretation. This has lead to calls for a return to a mild form of paternalism, allowing expertise coaching of patients and even withholding information, with patients escaping responsibility through blind or lazy trust. This is morally unacceptable, according to Kant's ideal of enlightenment, as we have a duty to take responsibility by trusting others reflexively, even as patients. Realizing the promises of personalized medicine requires a system of institutional controls of information and diagnostics, accessible for non-specialists, supported by medical expertise that can function as the accountable gate-keeper taking moral responsibility required for an active, reflexive trust.
Minimally invasive therapies for obesity are a bridge between lifestyle interventions and bariatric surgery. We developed a novel device to reduce weight gain rate and evaluated its safety and efficacy in juvenile pigs.
The intragastric satiety-inducing device (ISD) comprises a self-expandable esophageal metal stent connected to a star-shaped disc placed in the stomach fundus. Eight juvenile pigs were randomized into ISD (n = 5) and control (n = 3) groups. Body weight and serum ghrelin hormone were monitored weekly for 6weeks. One pig was followed up for 4 additional weeks (rebound pig) after ISD removal. Histological examination and immunohistochemistry for the interstitial cells of Cajal (ICCs) were performed.
ISD placement was successful in all pigs. Two ISDs (40%) migrated at 4 and 5weeks after placement. Weight gain rates were significantly lower in the ISD group than in the control group from week 1 to 6 but were higher in the rebound pig than in a control pig from week 7 to 10. Mean ghrelin hormone level was higher in the control group than in the ISD group from week 1 to 6. ISD induced reversible inflammatory changes in the esophagus and stomach fundus. The number of ICCs was lesser in ISD pigs than in control and rebound pigs.
ISD placement is feasible and safe in juvenile pigs. It decreases weight gain rate but induces reversible inflammatory reaction and tissue hyperplasia. Its mechanism may be related to pressure exertion on the stomach fundus or gastric motility alteration.
ISD placement is feasible and safe in juvenile pigs. It decreases weight gain rate but induces reversible inflammatory reaction and tissue hyperplasia. Its mechanism may be related to pressure exertion on the stomach fundus or gastric motility alteration.Bacterial biosynthesis of quantum dots (QDs) offers a green alternative for the production of nanomaterials with superior properties, such as tunable size dependent emission spectra and a long fluorescence lifetime. In this study, we have achieved intracellular production of PbS QDs using Pseudomonas aeruginosa ATCC 27853. The characterization of these PbS QDS was performed by different techniques, such as Ultraviolet-visible (UV-Vis) spectroscopy, photoluminescence (PL), X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX) and particle size analysis (DLS). The obtained results confirmed the synthesis of PbS QDs. Monocrotaline The PbS QDs showed absorption peaks at 1088 nm (ultraviolet-visible spectrometry) and a luminescence peak at 1572 nm. In addition, the intracellular biosynthesized PbS QDs showed a particle size in the range 3.47-11.45 nm, which is consistent with DLS and sphere-shaped nanocrystals with good crystallinity and a cubic cristalline structure including pure Pb and S elements.
Read More: https://www.selleckchem.com/products/monocrotaline.html
![]() |
Notes is a web-based application for online taking notes. You can take your notes and share with others people. If you like taking long notes, notes.io is designed for you. To date, over 8,000,000,000+ notes created and continuing...
With notes.io;
- * You can take a note from anywhere and any device with internet connection.
- * You can share the notes in social platforms (YouTube, Facebook, Twitter, instagram etc.).
- * You can quickly share your contents without website, blog and e-mail.
- * You don't need to create any Account to share a note. As you wish you can use quick, easy and best shortened notes with sms, websites, e-mail, or messaging services (WhatsApp, iMessage, Telegram, Signal).
- * Notes.io has fabulous infrastructure design for a short link and allows you to share the note as an easy and understandable link.
Fast: Notes.io is built for speed and performance. You can take a notes quickly and browse your archive.
Easy: Notes.io doesn’t require installation. Just write and share note!
Short: Notes.io’s url just 8 character. You’ll get shorten link of your note when you want to share. (Ex: notes.io/q )
Free: Notes.io works for 14 years and has been free since the day it was started.
You immediately create your first note and start sharing with the ones you wish. If you want to contact us, you can use the following communication channels;
Email: [email protected]
Twitter: http://twitter.com/notesio
Instagram: http://instagram.com/notes.io
Facebook: http://facebook.com/notesio
Regards;
Notes.io Team