Interaction of Penaeus vannamei hemocyanin and α2-macroglobulin modulates the phenoloxidase activity

2021 ◽  
Vol 138 ◽  
pp. 181-187
Author(s):  
Hui Zhou ◽  
Xibin Chen ◽  
Jude Juventus Aweya ◽  
Yongzhen Zhao ◽  
Defu Yao ◽  
...  
Keyword(s):  
Penaeus Vannamei ◽  
Phenoloxidase Activity ◽  
Α2 Macroglobulin

scholarly journals Innate immune responses of whiteleg shrimp (Penaeus vannamei) experimentally infected with acute hepatopancreas necrosis disease-causing Vibbrio parahaemolyticus

2019 ◽  
Vol 18 (01) ◽  
pp. 80-88
Author(s):  
Tuan V. Vo
Keyword(s):  
Immune Responses ◽  
Respiratory Burst ◽  
Innate Immune ◽  
Burst Activity ◽  
Penaeus Vannamei ◽  
Innate Immune Responses ◽  
Respiratory Burst Activity ◽  
Phenoloxidase Activity ◽  
Whiteleg Shrimp ◽  
Total Haemocyte Count

The innate immune responses of the whiteleg shrimps (Penaeus vannamei) experimentally challenged with V. parahaemolyticus by immersion were investigated for a period of 120 h. The results showed that the lethal dose 50% (LD50) of shrimps (2 - 3 g) challenged with V. parahaemolyticus was 4.7 × 106 CFU/mL. No significant differences in immune parameters were observed between the control and challenged group right after challenge (0 hpi). However, the total haemocyte count, phenoloxidase activity and respiratory burst activity were decreased in the challenged shrimps after 24 and 48 hpi and significantly different from those in the control shrimps (P < 0,05). At 72, 96 and 120 hpi, there were no significant differences in the total haemocyte count, phenoloxidase activity and respiratory burst activity between two treatments. The observations of this study showed that the innate immune responses of the whiteleg shrimp were decreased due to the infection by V. parahaemolyticus.

Purification and characterization of α2-macroglobulin from the white shrimp (Penaeus vannamei)

2003 ◽  
Vol 134 (4) ◽  
pp. 431-438 ◽  
Author(s):  
Teresa Gollas-Galván ◽  
Rogerio R. Sotelo-Mundo ◽  
Gloria Yepiz-Plascencia ◽  
Claudia Vargas-Requena ◽  
Francisco Vargas-Albores
Keyword(s):  
White Shrimp ◽  
Penaeus Vannamei ◽  
Purification And Characterization ◽  
Α2 Macroglobulin

Antithrombin Activity of Intact Human Platelets

1975 ◽  
Vol 34 (01) ◽  
pp. 115-126 ◽  
Author(s):  
Kiyoake Watanabe ◽  
Francis C Chao ◽  
James L Tullis
Keyword(s):  
Antithrombin Iii ◽  
Human Platelets ◽  
Significant Loss ◽  
Red Cells ◽  
Antithrombin Activity ◽  
Α2 Macroglobulin ◽  
Rapid Reaction ◽  
Pre Treatment ◽  
Different Characteristics

SummaryAntithrombin activity has been identified in intact washed human platelets. An apparent activity was demonstrated at platelet concentrations above 0.31 × 109/ml, when platelet suspensions were incubated with 2.0 NIH units/ml of thrombin. Neither red cells nor white cells revealed antithrombin activity. No significant loss of the platelet antithrombin activity was observed after ten successive washings or after treatment of platelets with antibodies to antithrombin III or α2-macroglobulin. Almost the same amount of antithrombin activity as normal platelets was demonstrated in the platelets from an afibrinogenemic patient. Pre-treatment of platelets with trypsin, papain, and neuroaminidase reduced the activity significantly, whereas lipase was without effect. The platelet antithrombin reacted with thrombin in less than 3 seconds, and this rapid reaction of platelet antithrombin was different from that of plasma antithrombin III or fibrinogen. The thrombin-like clotting activity of ancrod was inhibited by fibrinogen but not platelets. Also, unlike plasma antithrombin III or fibrinogen, brief exposure to heat (56° C or 60° C) reduced considerable amounts of platelet antithrombin activity. These results suggest that platelets possess a specific antithrombin with different characteristics from other known antithrombins.

Soluble Fibrin Complexes and Fibrinogen Heterogeneity in Diabetes mellitus

1980 ◽  
Vol 44 (03) ◽  
pp. 130-134 ◽  
Author(s):  
E B Tsianos ◽  
N E Stathakis
Keyword(s):  
Diabetes Mellitus ◽  
Molecular Weight ◽  
Plasma Proteins ◽  
Polyacrylamide Gel Electrophoresis ◽  
Gel Filtration ◽  
Lower Molecular Weight ◽  
Polyacrylamide Gels ◽  
Soluble Fibrin ◽  
Α2 Macroglobulin ◽  
Patients With Diabetes

SummaryThe presence of soluble fibrin complexes (SFC) measured by gel filtration of plasma on 4% agarose columns, fibrinogen heterogeneity on 3.5% SDS-polyacrylamide gels and the concentrations of several plasma proteins were evaluated in 39 patients with diabetes mellitus (DM) and 19 matched control subjects. A small but significant increase of SFC was found in DM (p<0.01). On individual basis 51.2% of the patients had increased SFC (>M + 2 SD of the controls). Polyacrylamide gel electrophoresis of the SFC showed no evidence of cross-linking or proteolysis. Plasma clots formed in the presence of EDTA and trasylol were analysed in SDS-polyacrylamide gels in a normal and two lower molecular weight fibrin bands (band I, II, III). The percentage of band I fibrinogen was in diabetics (65.3 ± 4.7%) lower than that of the controls (71.8 ± 4.5%) (p < 0.01). Fibrinogen levels, antithrombin III, α1-antitrypsin, α2-macroglobulin and plasminogen were significantly increased in DM. We suggest that in DM there is an enhancement of intravascular fibrin formation and accelerated fibrinogen degradation to lower molecular weight forms.

Effect of Anabolic Steroids on Plasma Antithrombin III

1975 ◽  
Vol 34 (01) ◽  
pp. 106-114 ◽  
Author(s):  
I. D Walker ◽  
J. F Davidson ◽  
P Young ◽  
J. A Conkie
Keyword(s):  
Heart Disease ◽  
Ischaemic Heart Disease ◽  
Oral Contraceptives ◽  
Disseminated Intravascular Coagulation ◽  
Fibrinolytic Activity ◽  
Antithrombin Iii ◽  
Anabolic Steroids ◽  
Intravascular Coagulation ◽  
Clear Cut ◽  
Α2 Macroglobulin

SummaryThe effect of seven different anabolic steroids (Ethyloestrenol, Methenolone acetate, Norethandrolone, Methylandrostenediol, Oxymetholone, Methandienone, and Stanozolol) on three α-globulin antiprotease inhibitors of thrombin and plasmin was studied in men with ischaemic heart disease. In distinct contrast to the oral contraceptives, five of the six 17-α-alkylated anabolic steroids studied produced increased plasma Antithrombin III levels and five produced decreased levels of plasma α2-macroglobulin. The effect on plasma α1antitrypsin levels was less clear-cut but three of the steroids examined produced significantly elevated levels. The increased plasma fibrinolytic activity which the 17-α-alkylated anabolic steroids induce is therefore unlikely to be secondary to disseminated intravascular coagulation.

Comparison of Progressive Antithrombin Activity and the Concentration of Three Thrombin Inhibitors in Nephrotic Syndrome

1981 ◽  
Vol 46 (03) ◽  
pp. 623-625 ◽  
Author(s):  
B Boneu ◽  
F Bouissou ◽  
M Abbal ◽  
P Sie ◽  
C Caranobe ◽  
...  
Keyword(s):  
Nephrotic Syndrome ◽  
Antithrombin Iii ◽  
Heparin Therapy ◽  
Thrombin Inhibitors ◽  
Compensatory Mechanism ◽  
Dramatic Reduction ◽  
Antithrombin Activity ◽  
Α2 Macroglobulin ◽  
At Iii ◽  
A Prospective Study

SummaryIn order to compare the plasmatic progressive antithrombin activity to the concentration of three thrombin inhibitors, antithrombin III (AT III), α2 macroglobulin (α2, M), α1 anti-trypsin (α1 AT) in nephrotic syndrome, a prospective study was carried out on a group of 28 children affected with the disease. A dramatic reduction of the level of AT III and of α1 AT, two inhibitors of molecular weight close to that of albumin, was observed. The decreased level of AT III was counterbalanced by an increase in α2 M. This phenomenon accounts for the increased progressive antithrombin activity observed in all the affected children. It is suggested that the above compensatory mechanism explains the absence of thrombotic accidents in this series and that the benefit of heparin therapy is doubtful in these conditions.

The Contact Phase of Blood Coagulation in Diabetes Mellitus and in Patients with Vasculopathy

1984 ◽  
Vol 52 (03) ◽  
pp. 221-223 ◽  
Author(s):  
M Christe ◽  
P Gattlen ◽  
J Fritschi ◽  
B Lämmle ◽  
W Berger ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Molecular Weight ◽  
Blood Coagulation ◽  
High Molecular Weight ◽  
Negative Correlation ◽  
Factor Xii ◽  
C1 Inhibitor ◽  
High Molecular Weight Kininogen ◽  
Contact Phase ◽  
Α2 Macroglobulin

SummaryThe contact phase has been studied in diabetics and patients with macroangiopathy. Factor XII and high molecular weight kininogen (HMWK) are normal. C1-inhibitor and also α2-macroglobulin are significantly elevated in diabetics with complications, for α1-macroglobulin especially in patients with nephropathy, 137.5% ± 36.0 (p <0.001). C1-inhibitor is also increased in vasculopathy without diabetes 113.2 ± 22.1 (p <0.01).Prekallikrein (PK) is increased in all patients’ groups (Table 2) as compared to normals. PK is particularly high (134% ± 32) in 5 diabetics without macroangiopathy but with sensomotor neuropathy. This difference is remarkable because of the older age of diabetics and the negative correlation of PK with age in normals.

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