Drug Evaluation, Preclinical/*methods ; Statistics

Antitussive Agents/*pharmacology ; Drug Evaluation, Preclinical/methods

Antitussive Agents/*pharmacology ; Drug Evaluation, Preclinical/methods

China Food and Drug Administration didn't issue any guideline on the pre-clinical study of drug-eluting coronary stent system, the basic requirement of the authorized administration was summarized to help manufacture prepare the document during the registration process.
China ; Drug Evaluation, Preclinical ; methods ; Drug-Eluting Stents ; Guidelines as Topic

Animals ; Dogs ; Drug Evaluation, Preclinical ; methods ; Statistics as Topic

Animals ; Antitussive Agents ; pharmacology ; Drug Evaluation, Preclinical ; methods ; Mice

Anticholesteremic Agents/*pharmacology ; Cholesterol/blood ; Drug Evaluation, Preclinical/methods

Hits, leads and drug candidates constitute three millstones in the course of drug discovery and development. The definition of drug candidates is a critical point in the value chain of drug innovation, which not only differentiates the research and development stages, but more importantly, determines the perspective and destiny of the pre-clinical and clinical studies. All outcomes from the development stage are actually attributed to the chemical structure of candidates. The quality of candidates, however, is restricted by the drug-likeness of lead compounds, which in turn is decided by the characteristics of hits. The hit-to-lead is to provide a promising and druggable structure for further development, whereas the optimization of lead compounds is a process to transform an active compound into a drug, which in essence is molecular manipulation in multi-dimensional space related to pharmacodynamic, pharmacokinetic, physico-chemical, and safety properties. This review discusses the strategic principles in hit discovery, lead identification and optimization, as well as drug candidate definition with practical examples.
Animals ; Drug Design ; Drug Evaluation, Preclinical ; methods ; Drug Industry ; methods ; Humans ; Molecular Structure ; Pharmaceutical Preparations ; chemistry

With the constant development of the drug screening technology, new screening methods and techniques have came to the fore, driving drug screening to grow rapidly and efficiently with a high throughput. Characterized by micro-scale analysis, high throughput, inheritability and good biocompatibility, the micro-fluidic analytical technology provides a new method and technical platform for screening active ingredients from natural products. This essay introduces multiple methods used for screening active ingredients from natural products and focuses on the micro-fluidic chip screening technology combined with cell culture and its characteristics, the composition of the platform of the micro-fluidic chip screening technology and its application in screening active ingredients from natural products.
Animals ; Biological Products ; chemistry ; Drug Evaluation, Preclinical ; methods ; Humans ; Microfluidic Analytical Techniques ; methods

Drug Evaluation, Preclinical ; methods ; Magnetic Resonance Spectroscopy ; methods ; Protein Synthesis Inhibitors ; isolation & purification ; Structure-Activity Relationship