南宫NG·28

4-n-butyl resorcinol (4-nBR) is a highly effective tyrosinase inhibitor, and can be used in cosmetic product for depigmentation purpose. Its efficacy correlates with 4-nBR that absorbed by skin. In this study, skin distribution of 4-nBR within either human or pig skin ex vivo was studied and compared by three independent laboratories. Good agreement was observed in each compartment considering usual inter-lab variability. The percutaneous absorption and skin distribution studies were carried out by L'Oréal (lab A), Fudan University (lab B), and Medicilon (lab C).

Columbin is an important component isolated from Radix Tinosporae. Columbin possesses many pharmacological activities, including anti-inflammation, and antitumor activity in vivo. The purpose of the present study was to examine in vivo pharmacokinetics and bioavailability of Columbin in rats using a high-performance liquid chromatography coupled with tandem mass spectrometry quantitative detection method. This is the first study demonstrating the bioanalytical method and pharmacokinetic of Columbin. Animal studies were carried out in Medicilon.

Paclitaxel-loaded hyaluronan solid nanoemulsions (PTX-HSNs) were successfully fabricated for the delivery of PTX to improve ovarian cancer treatment via active tumor targeting. The in vivo toxicity, in vivo antitumor effects, and pharmacokinetics of PTX-HSNs and Taxol were evaluated in nude mice and rats. PTX-HSN is a highly effective nanosystem with a high maximum tolerated dose (MTD) for delivering PTX to ovarian cancers characterized by CD44 overexpression, enhanced active tumor targeting, and low toxicity. All in vivo experiments were conducted with the approval of the Association for Assessment and Accreditation of Laboratory Animal Care (AAALAC) International (tested at Medicilon/MPI Preclinical Research).

A simple and accurate liquid chromatography coupled with tandem mass spectrometry method was developed for determination and in vivo pharmacokinetic studies of vitexin rhamnoside in rat plasma. Practical utility of this new LC/MS/MS method was confirmed in pilot pharmacokinetic studies in rats following both intravenous and oral administration. Animal studies were carried out in Medicilon.

Liver cancer is the fourth greatest cause of cancer related mortality. AD80 is a multi-kinase inhibitor with anti-tumoral activity across a variety of hepatocellular carcinoma (HCC) preclinical models, including mouse xenografts. AD80 is highly active in a tumor xenograft model. Experimental dosing for AD80 was determined from maximum tolerated dosage (MTD) studies and pharmacokinetic (PK) analysis. Quantities of AD80 in blood plasma were determined by LC-MS/MS at Medicilon.

Targeted protein degradation (TPD) exemplified by PROTACs is an emerging strategy for next generation drug discovery. Threonine tyrosine kinase (TTK) is a dual-specific protein kinase that catalyzes phosphorylation of both serine/threonine and tyrosine residues. Researchers designed and synthesized TTK PROTACs, which demonstrated reasonable pharmacokinetic profiles. All the pharmacokinetic studies were carried out by Medicilon, according to the protocols and guidelines of the institutional care and use committee.

Sulfonylureas exert their anti-diabetic effects by inhibiting K-ATP channels in the plasma membrane of islet β-cells. Chlorpropamide acts on complex II directly or indirectly via mitoK-ATP to produce mtROS as a pro-longevity signal. Chlorpropamide has an anti-aging effect on worms and human lung fibroblast MRC-5 cells. Determination of Chlorpropamide bioavailability in mice was performed by Medicilon.

Uncovering new therapeutics for kidney fibrosis hold promise for chronic kidney disease (CKD). BRD4 inhibition ameliorated kidney injury and fibrosis. ZLD2218 exhibited the potent inhibitory activity against BRD4, with the IC50 value of 107 nM. Pharmacokinetic analysis of of ZLD2218 were analyzed by noncompartmental methods using Phoenix WinNonlin 7.0 (Accomplished by Medicilon).

Immune checkpoint blockade therapies have changed the paradigm of cancer therapies. Reseachers performed in vivo screening for anti-PD-1 therapy across 23 syngeneic tumor models and found that CT-26 and Colon 26, which are murine colorectal carcinoma derived from BALB/c mice, showed different sensitivity to anti-PD-1. In vivo studies for anti-PD-1 antibody across 23 syngeneic tumor models were performed by Medicilon.

Phosphodiesterase-1 (PDE1) is a promising drug target closely related to central and peripheral diseases. Compound 2j with the IC50 of 21 nM against PDE1B, shows good metabolic stability in the rat liver microsomes. Stability test in the rat liver microsomes were performed by Medicilon.