en Original Research Original Research Normal healthy pulpal tissues were obtained from 19 impacted molars and symptomatic samples were obtained from 18 carious molars and premolars clinically diagnosed in all vital pulpal tissues. Student's t-test revealed significant differences in IL-2 concentrations, comparing symptomatic pulpal tissues with normal healthy samples (657, p<O.OI). These results suggest that IL -2 may serve as a marker of changes in pulp tissue. pulp tissue, inflammation, chemical transmitters, cytokines, interleukins, T lymphocytes, IL-2. 137 140 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-298-161&slc_lang=en&sid=1 SB MOUSAVI sbmousavi2@ yahoo.com 20031947532846003806 20031947532846003806 Yes From the Department of Endodontics, School of Dentistry, Isfahan University of Medical Sciences, the Department of Immunology, Isfahan University of Medical Sciences, and the School of Dentistry, Yazd University, Yazd, Iran. A REZAIE 20031947532846003807 20031947532846003807 No R SHEKAR-AMIZ 20031947532846003808 20031947532846003808 No