Hemostatic activity of the bovine parotid gland glycoconjugates.

The bovine parotid gland was studied by means of biochemical analyses and the glycoconjugates extracted were used to investigate the activity on the human hemostatic system. Thromboelastography was unable to reveal anticoagulant properties. Conversely, the Thrombin Time (TT) was prolonged in a statistically significant way and with dose-coupling response. Reptilase Time (RT) was affected by the highest concentration of extract suggesting that the bovine parotid glycoconjugates alter the fibrinogen polymerization.

Bovine submandibular gland extracts interact with the human hemostasis factors.

Glycoconjugates were extracted from the bovine submandibular gland and their anticoagulant activity was tested on the blood coagulation of human beings. The methods employed demonstrated that the thromboelastographic parameters were only modified by the highest concentration of glycoconjugates. Activated Partial Thromboplastin Time (aPTT) and Thrombin Time (TT) were affected by dose-coupling response. Prothrombin Time (PT) and Reptilase Time (RT) were not modified.

Lack of hemostatic effects of adult and suckling cat salivary gland heteropolysaccharides on blood coagulation.

Like other mammalian salivary glands, the cat submandibular and parotid glands belonging to adult and growing subjects contain heteropolysaccharides with very heterogeneous composition. Such glycoconjugates were this time tested in humans at doses used previously showing anticoagulant properties in rodents and lagomorphs. But surprisingly, no anticoagulant effects could be detected consistently. In fact, neither thromboelastography, nor hemocoagulation screening tests were affected in a statistically significant manner.

Anticoagulant activity with dose-related response of glycoconjugates from bovine sublingual gland.

In this study we extracted glycoconjugates from bovine sublingual gland and attempted to investigate anticoagulant properties on blood coagulation of humans. To this purpose we performed the thromboelastographic technique and selective hemocoagulation screening tests. In particular, findings from screening tests indicated the occurrence of hemostatic effects on thrombin time (TT) and activated partial thromboplastin time (aPTT) with a response in a dose-related manner, whereas significant changes were not found on prothrombin time (PT).

Effects of mammal submandibular gland glycoderivatives on human hemostatic system.

The aim of this study was to investigate the effects of glycoconjugate components extracted from the submandibular glands of four mammal species (rat, mouse, rabbit, hare) on human hemostatic system. The following analyses were performed: thromboelastography and hemocoagulation screening tests (Thrombin Time, Prothrombin Time, Partial Thromboplastin Time). Findings showed that all glycoconjugates induce modifications of fibrin clot formation time, modulus of elasticity and some hemocoagulation tests (TT, PTT). The anticoagulant effects were of inhibitory type.

Heterogeneous activity of rodent and lagomorph parotid gland extracts on the hemocoagulation process.

Anticoagulant properties of parotid glands belonging to four species of mammals (rat, mouse, rabbit and hare) were investigated on the hemostatic system of human being. Heterogeneous effects of the glycoconjugates extractable from different species were demonstrated by means of thromboelastography and hemocoagulation screening tests. In fact, glycoconjugates isolated from the rodent (rat and mouse) parotid glands changed all the thromboelastographic parameters and the hemocoagulation tests (Thrombin Time, Prothrombin Time, Partial Thromboplastin Time). Glycoconjugates extracted from the rabbit parotid gland strongly affected the thromboelastogram parameters in addition to the Partial Thromboplastin Time. Finally, glycoderivatives obtained from the hare parotid gland only influenced the Partial Thromboplastin Time.