scholarly journals Survival and Metabolic Modulation of Swimming Crab Portunus trituberculatus During Live Transport

2021 ◽  
Vol 8 ◽  
Author(s):  
Ce Shi ◽  
Yangfang Ye ◽  
Feng Pei ◽  
Changkao Mu ◽  
Chunlin Wang

Demand from consumers for small quantities of live swimming crab Portunus trituberculatus is rising with the development of e-commerce. However, it is challenging to keep P. trituberculatus alive post-capture. In this study, a transport bag containing oxygen and seawater (24 ppt) was used to investigate the survival and metabolic changes of P. trituberculatus during transport. The results showed that more than 80% P. trituberculatus could survive at least 24 h in the transport bag. The ability of the crabs to survive may be attributed to adaptive metabolism, as suggested by the switch from an aerobic to an anaerobic pathway for energy generation and a decline in amino acid metabolism, nucleic acid metabolism, and osmoregulation. Our findings suggest that the transport bag could effectively extend the post-capture survival time of P. trituberculatus. Metabolic adaptation – especially energy homeostasis – is crucial for crab survival during transport. Our study provides a promising method for the transport of live P. trituberculatus.

2012 ◽  
Vol 303 (10) ◽  
pp. R1053-R1061 ◽  
Author(s):  
A. Raynaud-Simon ◽  
L. Belabed ◽  
G. Le Naour ◽  
J. Marc ◽  
F. Capron ◽  
...  

Diabetic patients with wounds are at risk of protein malnutrition, have low arginine plasma levels, and suffer from delayed wound healing. We sought to determine the efficacy of arginine plus proline supplementation on protein and amino acid metabolism and on wound repair in a model of diabetic rats. Eighteen 11-wk-old Zucker diabetic fatty fa/fa male rats underwent a 7-cm abdominal skin incision with implantation of sponges and daily excision of full-thickness round sections of dorsal skin for 5 days. They were randomized to be fed with either a standard formula (S group, Clinutren Iso), a high-protein and arginine (ARG) plus proline (PRO)-enriched formula (ARG+PRO group, Clinutren Repair), or an isonitrogenous isoenergetic control formula (IC group). Nitrogen balance was calculated daily. The rats were euthanized on day 5, and plasma glucose, insulin, amino acids, skin epithelialization, and angiogenesis were measured. In macrophages, we assessed inducible nitric oxide synthase (iNOS) and arginase expression, production of nitric oxide (NO) and amino acid metabolism. Both the ARG+PRO and IC groups showed improved nitrogen balance. ARG plus PRO supplementation increased proline and branched-chain amino acid plasma concentrations and improved angiogenesis. Arginase and iNOS expressions in macrophages were reduced, together with NO and citrulline production. In diabetic rats, ARG plus PRO supplementation improves wound angiogenesis and favors whole body protein metabolism. Low macrophage iNOS expression at day 5 may reflect a low inflammatory state in the wounds, favoring wound closure.


1979 ◽  
Vol 7 (1) ◽  
pp. 261-262
Author(s):  
E. V. ROWSELL

1985 ◽  
Vol 4 ◽  
pp. 141-146 ◽  
Author(s):  
K VESTERBERG ◽  
J BERGSTROM ◽  
P FURST ◽  
U LEANDER ◽  
E VINNARS

1963 ◽  
Vol 9 (3) ◽  
pp. 337-341 ◽  
Author(s):  
MICHIO OISHI ◽  
SHIGERU KITAYAMA ◽  
HAJIME TAKAHASHI ◽  
BUNJI MARUO

Diabetes ◽  
1993 ◽  
Vol 42 (12) ◽  
pp. 1868-1877 ◽  
Author(s):  
L. Luzi ◽  
A. S. Petrides ◽  
R. A. De Fronzo

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