Abstract

The long term objective of this project is to explore the biochemistry and function of glycolipids, phospholipids and neutral lipids in gastrointestinal mucus in health and disease, and to provide the information on the role of mucus lipids in gastric mucosal protection. The specific goals set for the proposed period are: to define the role of covalently bound fatty acids and associated lipids in the viscoelastic, permselective and hydrophobic behavior of mucus glycoproteins along the gastrointestinal tract, and in the susceptibility of these glycoproteins to various proteases; to ascertain the extent of changes occurring in the covalently bound and associated lipids, and in the physicochemical characteristics of gastric mucus glycoprotein in stomach pathology; to assess the effect of antiulcer drugs that enhance the mucosal defense and agents affecting the integrity of mucus gel on the proteolytic susceptibility and the hydrophobic, viscoelastic, and permselective properties of gastric mucus and mucus glycoprotein; to study the effect of antiulcer drugs that enhance the mucosal defense on the acylation of mucus glycoprotein with fatty acids by gastric mucosal cells in culture; to conduct the measurements of the mucus glycoprotein fatty acyltransferase enzyme activity in fundic and antral mucosal biopsies of patients with gastric disease in order to provide an insight into the changes taking place in gastric mucus gel in stomach pathology; and to investigate the extent of changes occurring in mucus and mucosa components of gastric mucosal barrier in disease by studying in human gastric mucosal biopsies the activity of sulfotransferase enzymes responsible for sulfation of structural and secretory glycolipids.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Research Project (R01)
Project #
2R01DK021684-10
Application #
3227077
Study Section
General Medicine A Subcommittee 2 (GMA)
Project Start
1978-09-15
Project End
1988-05-31
Budget Start
1987-09-15
Budget End
1988-05-31
Support Year
10
Fiscal Year
1987
Total Cost
Indirect Cost

  Institution

Name
New York Medical College
Department
Type
Schools of Medicine
DUNS #
City
Valhalla
State
NY
Country
United States
Zip Code
10595

  Publications

Keogh, J P; Zirvi, K A; Vossough, S et al. (1993) Pharmacological alterations of cellular transglutaminase activity and invasiveness in human colorectal carcinoma cells. Cancer Biochem Biophys 13:209-20
Liu, J; Fekete, Z; Slomiany, A et al. (1993) Activation of gastric mucosal calcium channels by epidermal growth factor. Int J Biochem 25:29-35
Slomiany, A; Grabska, M; Slomiany, B A et al. (1993) Intracellular transport, organelle biogenesis and establishment of Golgi identity: impact of brefeldin A on the activity of lipid synthesizing enzymes. Int J Biochem 25:891-901
Zirvi, K A; Najjar, T A; Slomiany, B L (1993) Sensitivity of human colon tumor metastases to anticancer drugs in athymic (nude) mice. Cancer Lett 72:39-44
Zirvi, K A; Keogh, J P; Slomiany, A et al. (1993) Effects of exogenous transglutaminase on spreading of human colorectal carcinoma cells. Cancer Biochem Biophys 13:283-94
Konturek, S J; Brzozowski, T; Majka, J et al. (1992) Transforming growth factor alpha and epidermal growth factor in protection and healing of gastric mucosal injury. Scand J Gastroenterol 27:649-55
Slomiany, B L; Liau, Y H; Lopez, R A et al. (1992) Effect of Helicobacter pylori lipopolysaccharide on the synthesis of sulfated gastric mucin. Biochem Int 27:687-97
Sengupta, S; Piotrowski, E; Slomiany, A et al. (1992) Adrenergic and cholinergic regulation of gastric mucus phospholipid secretion. Scand J Gastroenterol 27:29-32
Slomiany, B L; Liu, J; Keogh, J P et al. (1992) Enhancement of gastric mucosal epidermal growth factor and platelet-derived growth factor receptor expression by sucralfate. Gen Pharmacol 23:715-8
Slomiany, A; Grzelinska, E; Kasinathan, C et al. (1992) Biogenesis of endoplasmic reticulum transport vesicles transferring gastric apomucin from ER to Golgi. Exp Cell Res 201:321-9

Showing the most recent 10 out of 78 publications