PMID- 1897967 OWN - NLM STAT- MEDLINE DCOM- 19911024 LR - 20190628 IS - 0003-9861 (Print) IS - 0003-9861 (Linking) VI - 286 IP - 2 DP - 1991 May 1 TI - Cysteine sulfinic acid decarboxylase activity in response to thyroid hormone administration in rats. PG - 428-32 AB - The modulation of hepatic and renal cysteine sulfinic acid decarboxylase (EC 4.1.1.29) activities by triiodothyronine (T3) was studied in a series of experiments. In a dose--response study, hepatic cysteine sulfinic acid decarboxylase activity (CSAD) was depressed by 65% and renal activity was increased threefold in rats injected with 100 micrograms T3/100 g body wt for 7 days when compared to rats injected with 0.3 micrograms T3/100 g body wt. Western blot analysis indicated that these changes in CSAD activity were due to changes in the quantity of CSAD protein. Changes in hepatic and renal activities were not evident until 24 h after T3 administration. In response to T3 clearance, hepatic and renal CSAD activities approached euthyroid values 4-7 days after cessation of T3 injections although serum T3 concentrations were no different from euthyroid values 48 h after T3 injections were stopped. These data indicate that thyroid hormone effects persist after T3 clearance. The response of CSAD to thyroid status may be related to its role in taurine biosynthesis. FAU - Jerkins, A A AU - Jerkins AA AD - Department of Nutritional Sciences, University of Wisconsin, Madison 53706. FAU - Steele, R D AU - Steele RD LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Arch Biochem Biophys JT - Archives of biochemistry and biophysics JID - 0372430 RN - EC 4.1.1.- (Carboxy-Lyases) RN - EC 4.1.1.29 (sulfoalanine decarboxylase) RN - Q51BO43MG4 (Thyroxine) SB - IM MH - Animals MH - Body Weight/drug effects MH - Carboxy-Lyases/*metabolism MH - Dose-Response Relationship, Drug MH - Kidney/drug effects/*enzymology MH - Kinetics MH - Liver/drug effects/*enzymology MH - Male MH - Metabolic Clearance Rate MH - Rats MH - Rats, Inbred Strains MH - Reference Values MH - Thyroxine/blood/pharmacokinetics/*pharmacology MH - Time Factors EDAT- 1991/05/01 00:00 MHDA- 1991/05/01 00:01 CRDT- 1991/05/01 00:00 PHST- 1991/05/01 00:00 [pubmed] PHST- 1991/05/01 00:01 [medline] PHST- 1991/05/01 00:00 [entrez] AID - 0003-9861(91)90061-M [pii] AID - 10.1016/0003-9861(91)90061-m [doi] PST - ppublish SO - Arch Biochem Biophys. 1991 May 1;286(2):428-32. doi: 10.1016/0003-9861(91)90061-m.