An exploration of the effects ofL- andD-tetrahydroisoquinoline-3-carboxylic acid substitutions at positions 2,3 and 7 in cyclic and linear antagonists of vasopressin and oxytocin and at position 3 in arginine vasopressin

1995 ◽  
Vol 1 (1) ◽  
pp. 66-79 ◽  
Author(s):  
Maurice Manning ◽  
Ling Ling Cheng ◽  
Stoytcho Stoev ◽  
Krzysztof Bankowski ◽  
Jozef Przybyiski ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Arginine Vasopressin

Highly Potent 1-Aminocyclohexane-1-Carboxylic Acid Substituted V2Agonists of Arginine Vasopressin

2004 ◽  
Vol 47 (24) ◽  
pp. 6020-6024 ◽  
Author(s):  
Wioleta Kowalczyk ◽  
Adam Prahl ◽  
Izabela Derdowska ◽  
Olga Dawidowska ◽  
Jiřina Slaninová ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Arginine Vasopressin

The Effects of N-Terminal Part Modification of Arginine Vasopressin Analogues with 2-Aminoindane-2-carboxylic Acid:  A Highly Potent V2Agonist

2007 ◽  
Vol 50 (12) ◽  
pp. 2926-2929 ◽  
Author(s):  
Wioleta Kowalczyk ◽  
Dariusz Sobolewski ◽  
Adam Prahl ◽  
Izabela Derdowska ◽  
Lenka Borovičková ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Arginine Vasopressin ◽  
Terminal Part ◽  
Vasopressin Analogues

Synthesis and properties of analogues of vasopressin with 1-aminocyclopropane-1-carboxylic acid in position 9

1988 ◽  
Vol 53 (11) ◽  
pp. 2604-2616 ◽  
Author(s):  
Zdenko Procházka ◽  
Juris E. Ancans ◽  
Jiřina Slaninová ◽  
Alena Machová ◽  
Tomislav Barth ◽  
...  
Keyword(s):  
Biological Activity ◽  
Amino Acid ◽  
Nmr Spectroscopy ◽  
Carboxylic Acid ◽  
Arginine Vasopressin ◽  
Solid Phase ◽  
Biological Activities ◽  
Solution Conformation ◽  
Lysine Vasopressin ◽  
C Nmr

Solid phase methodology on benzhydrylamine resin was used for the synthesis of three analogues of vasopressin with non-coded amino acid, 1-aminocyclopropane 1-carboxylic acid, in position 9. Two analogues of lysine-vasopressin ([Lys8, Acc9]vasopressin (I) and Gly3-[Lys8, Acc9]vasopressin (II)) and one analogue of arginine-vasopressin ([Arg8, Acc9]vasopressin (III)) have been synthesized. The dubious value of the biological activity of [Lys8, D-Ala9]vasopressin was reevaluated and [Lys8, L-Ala9]vasopressin was also synthesized and tested for the comparison. Differences in solution conformation of these two analogues were studied by 1H and 13C NMR spectroscopy. Biological activities of all analogues were either significantly lowered or almost completely eliminated. Analogues I-III were found to be completely inactive in analgesia and the CNS activities tested (active and passive avoidance).

1-Desamino-8-D-Arginine Vasopressin (DDAVP) Infusion in Type IIB von Willebrand’s Disease: Shortening of Bleeding Time and Induction of a Variable Pseudothrombocytopenia

1990 ◽  
Vol 64 (01) ◽  
pp. 117-120 ◽  
Author(s):  
Alessandra Casonato ◽  
M Teresa Sartori ◽  
Luigi de Marco ◽  
Antonio Girolami
Keyword(s):  
Monoclonal Antibody ◽  
Platelet Count ◽  
Arginine Vasopressin ◽  
Calcium Concentration ◽  
Sodium Citrate ◽  
Bleeding Time ◽  
Blood Collection ◽  
Von Willebrand's Disease ◽  
Blood Samples ◽  
Von Willebrand’S Disease

SummaryWe have investigated the effects of 1-desamino-8-D-arginine vasopressin (DDAVP) infusion on platelet count and bleeding time in 4 patients with type IIB von Willebrand’s disease (vWd). Three of four patients showed a normalization of the bleeding time within 1 h after the infusion, while bleeding time was not modified in the fourth. In accordance with the literature, thrombocytopenia was observed after DDAVP infusion, but this thrombocytopenia was due to the anticoagulants used for blood collection. In two patients (F. I., G. F.) no thrombocytopenia was observed when platelets were counted by fingerstick method but there was a 20% platelet decrease in blood samples collected in sodium citrate and a 50% decrease in samples collected in EDTA. Dramatic falls in platelet counts (70–95%) were observed in the additional two patients (C. A., D.Z.) after DDAVP infusion, when both sodium citrate or EDTA were used as anticoagulants. In the latter two patients there was also a 50% decrease in platelet count when the fingerstick method was used. The decrease in the patient’s platelet count in EDTA samples after DDAVP infusion could be prevented, in part, by the previous additions of an anti GPIb monoclonal antibody and an anti GPIIb-IIIa monoclonal antibody.Thus, the thrombocytopenia observed in the four IIB vWd patients studied after DDAVP infusion seems to be, at least partially, a pseudothrombocytopenia depending on the calcium concentration in the blood samples and the availability of GPIb and GPIIb-IIIa receptors. These findings and the normalization of the bleeding time observed in three of the four patients has led us to reconsider the possible use of DDAVP in the treatment of our IIB vWd patients.

Fibrinolytic Activity of Cerebro-Spinal Fluid and the Development of Artificial Cerebral Haematomas in Dogs

1969 ◽  
Vol 21 (02) ◽  
pp. 294-303 ◽  
Author(s):  
H Mihara ◽  
T Fujii ◽  
S Okamoto
Keyword(s):  
Cerebrospinal Fluid ◽  
Carboxylic Acid ◽  
Fibrinolytic Activity ◽  
Clinical Implications ◽  
Trans Form ◽  
Plate Method ◽  
Blood Samples ◽  
Fibrin Plate ◽  
The Brain

SummaryBlood was injected into the brains of dogs to produce artificial haematomas, and paraffin injected to produce intracerebral paraffin masses. Cerebrospinal fluid (CSF) and peripheral blood samples were withdrawn at regular intervals and their fibrinolytic activities estimated by the fibrin plate method. Trans-form aminomethylcyclohexane-carboxylic acid (t-AMCHA) was administered to some individuals. Genera] relationships were found between changes in CSF fibrinolytic activity, area of tissue damage and survival time. t-AMCHA was clearly beneficial to those animals given a programme of administration. Tissue activator was extracted from the brain tissue after death or sacrifice for haematoma examination. The possible role of tissue activator in relation to haematoma development, and clinical implications of the results, are discussed.

Interaction of Vasopressin with Human Blood Platelets: Dependency on Mg2+

1986 ◽  
Vol 56 (03) ◽  
pp. 260-262 ◽  
Author(s):  
Isabella Roos ◽  
Fabrizia Ferracin ◽  
Alfred Pletscher
Keyword(s):  
Phosphatidic Acid ◽  
Human Blood ◽  
Arginine Vasopressin ◽  
Specific Binding ◽  
Blood Platelets ◽  
Bivalent Cations ◽  
Platelet Membranes ◽  
Maximal Rise ◽  
Human Blood Platelets ◽  
Stimulation Of

SummaryArginine-vasopressin (AVP) in the presence of Mg2+ but not in the absence of bivalent cations led to accumulation of [32P]-phosphatidic acid ([32P]-PA) in human blood platelets. Mg2+ also enhanced the specific binding of [3H]-AVP to intact platelets. The concentrations of the cation which enabled AVP to cause half maximal rise of [32P]-PA and those inducing half maximal [3H]-AVP-binding were of the same order. It is concluded that the stimulation of phosphatidyl inositide breakdown by AVP in presence of Mg2+ is at least partially due to a Mg2+-induced enhancement of specific AVP-binding to the platelet membranes.

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