| Chiu-Po Chan |
------>authors3_c=None ------>paper_class1=1 ------>Impact_Factor=2.691 ------>paper_class3=2 ------>paper_class2=1 ------>vol=208 ------>confirm_bywho=yangyuan ------>insert_bywho=hoyuansn ------>Jurnal_Rank=16.0 ------>authors4_c=None ------>comm_author= ------>patent_EDate=None ------>authors5_c=None ------>publish_day=None ------>paper_class2Letter=None ------>page2=104 ------>medlineContent= ------>unit=E0500 ------>insert_date=20051208 ------>iam=2 ------>update_date=None ------>author=??? ------>change_event=4 ------>ISSN=None ------>authors_c=None ------>score=473 ------>journal_name=Toxicology ------>paper_name=Inhibition of cyclooxygenase activity, platelet aggregation and thromboxane B2 production by two environmental toxicants: m-cresol and o-cresol. ------>confirm_date=20061208 ------>tch_id=084007 ------>pmid=15664436 ------>page1=95 ------>fullAbstract=Cresol is a well-known environmental pollutant, toluene metabolite, uremic toxicant and accidental poisoning product. Formocresol, a preparation of formalin and cresol, is also used as a root canal medicament and for pulpotomy of primary teeth. However, little is known about its effect on cardiovascular system. In this study, m-cresol inhibited the AA-induced platelet aggregation by 43-97% at concentrations ranging from 0.25 to 1 mM. Collagen-induced platelet aggregation was also inhibited by 0.25-1 mM of m-cresol by 47-98%. Accordingly, o-cresol (0.1-0.5 mM) also inhibited the AA-induced platelet aggregation by 46-96% and the collagen-induced platelet aggregation by 35-88% at concentrations of 0.1-1 mM. AA- and collagen-induced platelet thromboxane B(2) (TXB(2)) production was inhibited by even 0.1 mM of m-cresol with 88 and 54% of inhibition, respectively. The o-cresol (0.1 mM) also inhibited the AA- and collagen-induced platelet TXB(2) production with 91 and 97% respectively. Although m- and o-cresol (<1 mM) showed little effect on thrombin-induced platelet aggregation, they effectively inhibited the thrombin-induced platelet TXB(2) production. The m-cresol (2 and 5 mM) inhibited the COX-1 activity by 55-99%, but showed little effect on COX-2 enzyme activity. Moreover, o-cresol (0.5 and 1 mM) inhibited the COX-1 activity by 40-95%. COX-2 enzyme activity was inhibited by 68% at a concentration of 5 mM o-cresol. These results indicate that acute cresol-poisoning, direct root canal medication with formocresol or long-term occupational exposure to cresol and toluene may potentially suppress blood clot formation and lead to tissue hemorrhage via inhibition of platelet aggregation, TXB(2) production and COX enzyme activity. ------>tmu_sno=None ------>sno=12096 ------>authors2=Yuan-Soon Ho ------>authors3=Ying-Jen Wang ------>authors4=Wan-Hong Lan ------>authors5=Lin-I Chen ------>authors6=Yi-Jane Chen, Bor-Ru Lin, Mei-Chi Chang, Jiiang-Hu ------>authors6_c=None ------>authors=Chiu-Po Chan ------>delete_flag=0 ------>SCI_JNo=None ------>authors2_c=None ------>publish_area=None ------>updateTitle=Inhibition of cyclooxygenase activity, platelet aggregation and thromboxane B2 production by two environmental toxicants: m- and o-cresol. ------>language=2 ------>check_flag=None ------>submit_date=None ------>country=None ------>no=1 ------>patent_SDate=None ------>update_bywho=None ------>publish_year=2005 ------>submit_flag=None ------>publish_month=None |