PAMPA Permeability

About the Assay

Parallel artificial membrane permeability assay (PAMPA) is an in vitro method to predict the passive permeability in an artificial lipid membrane system in the absence of any active transport processes.

The PAMPA system has been shown to have good correlation with in vitro permeability assay platforms and known human absorption for passively permeable compounds.

Protocol Summary

Sygnature Discovery utilise the Corning® BioCoat™ PAMPA membrane plate system which is a lipid/oil/lipid tri-layer artificial membrane.

Well Format

96

Incubation Concentration

10 µM

Number of Replicates

3

Incubation Volumes

300 uL (donor), 200 uL (acceptor)

Incubation Buffer

Phosphate buffered saline (PBS) pH 7.4

Control Compounds

Caffeine (high permeability) & Famotidine (low permeability)

DMSO & MeOH

1 %v/v DMSO, 10 %v/v MeOH

Quantitation

LC MS/MS analysis

Data Deliverables

Apparent permeability coefficient (Papp) and recovery (%).

Compound Selection

Positive Control (passive permeable)
Negative Control

Caffeine

Famotidine

Validation Results

Figure 1: Caffeine and Famotidine passive permeability in PAMPA. Values expressed as mean +/- SD in experiments n=14 for Caffeine and n=12 for Famotidine conducted in triplicate.

References

Physicochemical High Throughput Screening:  Parallel Artificial Membrane Permeation Assay in the Description of Passive Absorption Processes, (1998) J. Med. Chem., 1007-1010

Current industrial practices of assessing permeability and P-glycoprotein interaction, (2006) AAPS J; E1-13