Preclinical Rodent Dosing & In Vivo Administration Protocols
Standards for dose-volume formulation, route selection, and ethical animal welfare limits in cancer research.
Accurate injection volume calculation is a foundational prerequisite for preclinical drug discovery, pharmacokinetic (PK) profiling, and xenograft tumor efficacy studies. The universal formula V = (Dose × BW) / C ensures individual animals receive precise weight-adjusted milligram doses.
Route-Specific Guidelines for Mice (Mus musculus)
Diehl et al. (2001) define standard maximal safe bolus volumes for adult mice: Intraperitoneal (IP): ≤ 20 mL/kg (ideal 10 mL/kg); Oral gavage (PO): ≤ 10 mL/kg (max 20 mL/kg with vehicle caution); Subcutaneous (SC): ≤ 10 mL/kg (split over multiple sites if viscous); Intravenous (IV): ≤ 5 mL/kg bolus (or up to 10 mL/kg slow infusion).
Salt Form & Molecular Weight (RMM) Corrections
When preparing doses from salt compounds (e.g. hydrochloride ·HCl, mesylate, or sodium salts), investigators must correct for the active free-base fraction: Weighing Factor = RMM(salt) / RMM(free base). Forgetting this correction causes systematic underdosing by 10% to 35%.
Verified In Vivo Literature Citations:
- Diehl KH, Hull R, Morton D, Pfister R, Rabemampianina Y, Smith D, Vidal JM, van de Vorstenbosch C. A good practice guide to the administration of substances and removal of blood, including routes and volumes. J Appl Toxicol. 2001; 21(1):15-23. PubMed PMID: 11180276 ↗
- Nair AB, Jacob S. A simple practice guide for dose conversion between animals and human. J Basic Clin Pharm. 2016; 7(2):27-31. PubMed PMID: 27057123 ↗
- Reagan-Shaw S, Nihal M, Ahmad N. Dose translation from animal to human studies revisited. FASEB J. 2008; 22(3):659-661. PubMed PMID: 17942826 ↗