PMID- 8593246 OWN - NLM STAT- MEDLINE DCOM- 19960408 LR - 20190920 IS - 0898-6568 (Print) IS - 0898-6568 (Linking) VI - 7 IP - 8 DP - 1995 Nov TI - Effect of essential fatty acid deficiency on G-proteins, cAMP-dependent protein kinase activity and mucin secretion in the rat submandibular salivary glands. PG - 773-81 AB - Studies were conducted to determine whether beta-adrenergic cell signalling is altered in submandibular salivary glands (SMSG) is essential fatty acid (EFA) deficiency. Three groups of rats were fed diets which were deficient in EFA (EFAD), marginally deficient in EFA (MEFAD) or contained sufficient amount of EFA (Control). Rats were killed after 20 wk on diets, SMSG were dissected out and cyclic AMP-dependent protein kinase (PKA) activity was measured. The specific enzyme activities were higher in the homogenates and supernatant fractions of the gland from EFAD and MEFAD rats compared with the controls. The relative levels of guanine nucleotide-binding regulatory proteins (Gs and Gi) were also measured in the SMSG membranes of rats fed the 3 diets. The levels of Gs were significantly higher in the EFAD and MEFAD groups than in the controls. No significant differences were observed in the secretion of trichloroacetic acid-phosphotungstic acid (TCA-PTA) precipitable glycoproteins from the SMSG slices among the 3 dietary groups. FAU - Alam, S Q AU - Alam SQ AD - Department of Biochemistry and Molecular Biology, Louisiana State University Medical Center, New Orleans 70119, USA. FAU - Abdel-Hakim, S M AU - Abdel-Hakim SM FAU - Alam, B S AU - Alam BS FAU - Ibrahim, I Y AU - Ibrahim IY LA - eng GR - DE 05978/DE/NIDCR NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Cell Signal JT - Cellular signalling JID - 8904683 RN - 0 (Dietary Fats) RN - 0 (Fatty Acids, Essential) RN - 0 (Mucins) RN - 0 (Receptors, Adrenergic, beta) RN - 0 (Salivary Proteins and Peptides) RN - E0399OZS9N (Cyclic AMP) RN - EC 2.7.11.11 (Cyclic AMP-Dependent Protein Kinases) RN - EC 3.6.1.- (GTP-Binding Proteins) RN - EC 4.6.1.1 (Adenylyl Cyclases) SB - IM MH - Adenylyl Cyclases/metabolism MH - Animals MH - Body Weight/drug effects MH - Cyclic AMP/physiology MH - Cyclic AMP-Dependent Protein Kinases/*metabolism MH - Dietary Fats/administration & dosage MH - Fatty Acids, Essential/*deficiency/metabolism MH - GTP-Binding Proteins/*metabolism MH - Male MH - Mucins/*metabolism MH - Rats MH - Rats, Sprague-Dawley MH - Receptors, Adrenergic, beta/*physiology MH - Saliva/metabolism MH - Salivary Proteins and Peptides/*metabolism MH - Secretory Rate/drug effects MH - *Signal Transduction MH - Submandibular Gland/*metabolism EDAT- 1995/11/01 00:00 MHDA- 1995/11/01 00:01 CRDT- 1995/11/01 00:00 PHST- 1995/11/01 00:00 [pubmed] PHST- 1995/11/01 00:01 [medline] PHST- 1995/11/01 00:00 [entrez] AID - 0898656895020055 [pii] AID - 10.1016/0898-6568(95)02005-5 [doi] PST - ppublish SO - Cell Signal. 1995 Nov;7(8):773-81. doi: 10.1016/0898-6568(95)02005-5.