High impact information on Omasum

• In the mouse, expression of exon v10 was restricted to basal layers of the epidermis and squamous epithelium of the oral cavity, the esophagus, the omasum, glandular epithelium of the submandibular and the uterine gland, as well as subpopulations of bone marrow cells and activated lymphocytes [1].
• Immunohistochemical study on the distribution of neuron-specific enolase- and peptide-containing nerves in the omasum of cattle [2].
• The distribution of nerves containing immunoreactivity for substance P (SP), vasoactive intestinal polypeptide (VIP), leucine-enkephalin (LENK), and gastrin-releasing polypeptide (GRP) in the margin of the reticulo-omasal orifice, omasum, and omasal pillar of calves and cows was studied by immunohistochemistry [2].
• The omasum of red deer during prenatal life, especially from 67 days of gestation, was shown to be an active structure with full secretory capacity [3].
• Weight-specific mucosal O2 uptake (ml/g DM per h), measured in vitro, was 37 % higher for the forestomach (reticulum, rumen and omasum) and small intestine (jejunum) than for the abomasum and large intestine (caecum and colon), but there was no evidence for a diet effect (except colon; forage-fed 5.3, concentrate-fed 4.2; P=0.036) [4].

Anatomical context of Omasum

• The predominant form of ammonia absorbed in the omasum is probably NH(3), which is protonated in the cytosol [5].

Associations of Omasum with chemical compounds

• The slope (0.856) indicated that 86% of purines that reached the omasum were excreted as purine derivatives [6].
• The disappearance from the small-particle pool was to VFA and CO2 production and to the omasum accounting for 0.14 (SE 0.18) and 0.86 (SE 0.24) respectively, of the total flow [7].
• Outflow of VFA to the omasum was calculated to equal 20, 25 and 12% of the irreversible loss of acetate, propionate and butyrate, respectively [8].
• Polyethylene glycol and plastic particles of different lengths (1 and 10 mm) and densities (0.92, 1.03, 1.22 and 1.44 g/ml) were either fed or were introduced into the omasum [9].
• Atropine (0.2 mg kg-1), hexamethonium (2 mg kg-1) or haloperidol (0.1 mg kg-1) abolished rumen secondary cycles and inhibited omasum activity [10].

Gene context of Omasum

• Effects of gastrin on emptying and composition of digesta of the omasum of sheep [11].
• Nerve fibres showing somatostatin-like immunoreactivity were identified in the oesophagus, reticulum wall and groove, rumen pillar and wall, omasum sulcus and abomasum [12].
• 4. In sheep and cattle the epithelium of rumen, omasum and reticulum were the richest sources of rhodanese [13].

Analytical, diagnostic and therapeutic context of Omasum

• Intravenous injection of 0.5, 1.0, or 2.0 microgram/kg/hr of synthetic human gastrin I caused a marked decrease in flow rate of fluid from the omasum [11].

References