Effect of Propolis Preparations on Transepithelial Electrical Potential, Resistance, and Ion Transport in In Vitro Study

Table 1

The experimental table taking into account the experimental groups, incubation solutions, type of stimulation, and electrophysiological parameters.

Group	Pre- incubation fluid (30 min)	Incubation fluid (30 min)	Mechanical stimulation fluid	Chemical stimulation fluid (15s)	Electrophysiological parameters
I group: Long-term incubation in 1 ml ethanol extract of propolis in 100 ml water  N =22	1 ml EEP in 100 ml water + RH	RH	RH	B; AB	PDmin; PDmax; R; dPD; PD
II group: Undisturbed ion transport N =22	RH	RH	RH
III group: Long- term incubation in propolis ointment N =18	propolis ointment + RH	RH	RH

Abbreviations. N: number of specimens, RH: Ringer solution, B: bumetanide (0.1mM) in Ringer solution, AB: amiloride in bumetanide (0.1mM) in Ringer solution, PD: transepithelial electrical potential differences in stationary conditions before and after stimulation (mV), dPD: changes of electrical potential differences during stimulation (mV), PDmin: minimal transepithelial electrical potential (mV), PDmax: maximal transepithelial electrical potential (mV), and R: transepithelial resistance (Ohm/cm²).