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In Vitro Study No: 67

METHODS

Chemical Conc. (mg/ml)Volume (ml)Loading (mg/cm2)VehicleSpeciesMembraneSiteArea (cm2)Cell TypeReceptor FluidTemp. (oC)Temp. MeasuredExposure Time (h)Study Length (h)OccludedAnalytical Method
Testosterone0.004810.0096WaterTestskin TM3microm pore size polycarbonate membraneN/A0.5StaticLDE Assay Medium & gentamycin sulphate32Water Bath662Radiolabelled (14C)

RESULTS

% Recovery+/-% In Stratum Corneum+/-% in Viable Skin+/-% Penetrated+/-% Absorbed+/-s-s-flux (mcrg/cm2/h)+/-kp (cm/h)nLag Time (h)
          0.1392 0.02912 

NOTES

0.5 microCi and 2microg of testosterone in each ml of water. The Kp was calculated from the average % applied dose/cm2/h for the 2nd through to the 6th h, when rates had reached steady state. They didn't include the steady state flux in the paper. I calculated it by multiplying the Kp by the concentration.They used 3 LSE's per exp 3-6 exp.

REFERENCE

Absorption And Metabolism Of Topically Applied Testosterone In An Organotypic Skin Culture (1992) Skin Pharmacol., 5 :146-153