Preclinical CRO & Outsourcing

How to Choose a Preclinical CRO: 7 Questions for Early Drug Development

A candidate molecule can show excellent in vitro activity and still fail once it enters an animal model. When that happens, the immediate question is often: Was the animal model wrong? But the real cause may sit somewhere else entirely―insufficient target engagement, poor tissue exposure, rapid metabolism, ineffective delivery, species differences, or simply a fragmented […]

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What causes high variability in Western blot results, and how can assay reproducibility be improved across preclinical studies?

High variability in Western blot assays across experimental runs typically stems from either technical execution inconsistencies during sample preparation and transfer or unaddressed biological heterogeneity across animal tissues. The most critical variables to audit, ranked by priority, include: 1. Sample integrity and quantification errors caused by repeated freeze-thaw degradation or imprecise protein concentration assays; 2.

What causes high variability in Western blot results, and how can assay reproducibility be improved across preclinical studies? Read More »

What causes low yield or lost signal during membrane protein extraction and Western blot detection?

Low signal or missing bands in membrane protein assays typically stem from hydrophobic aggregation during sample boiling, inadequate membrane fractionation, or insufficient starting tissue mass. Check these primary factors in order of likelihood: To distinguish between these issues, check the gel loading wells: if target aggregates are trapped in the well or stacking gel, reduce

What causes low yield or lost signal during membrane protein extraction and Western blot detection? Read More »