Hagfish are the plesiomorphic sister group of all vertebrates. They are scavengers and many live at depths reaching thousands of meters. In addition, hagfish show the lowest metabolic rate as well as cardiac performance in vertebrates. This dissertation evaluated the biochemical characterizations of hagfish skeletal muscles related to the feeding apparatus and hagfish cardiac muscle associated with cardiac performance and deep-sea effects at the proteomic and metabolomic levels. In Chapter one and two, I found creatine kinase over-expressed in hagfish somatic muscle and deep-sea hagfish cardiac muscle, I suppose that this enzyme was important for utilization of stored phosphocreatine in deep-sea animals¡¦ somatic muscle and cardiac muscle. Over-expressed glycogen phosphorylase in hagfish dental and deep-sea hagfish cardiac muscle supposes these two types of muscles undergoing the anaerobic glycolysis. Compared to teleosts (cobia and tuna), TMAO and urea were higher in hagfish suggest their functions in hagfish cardiac muscle as osmolytes, however, higher TMAO but not urea in deep-sea hagfish, I suggest TMAO functions not only as an osmolyte but also physiological impacts in hagfish cardiac muscle for depth-related adaptations. I also found higher nebulin express in hagfish cardiac muscle and higher tropomyosin express in cobia and tuna cardiac muscles, thus their contractile differentiations were resulted from the protein-protein mechanism. This dissertation provides candidate proteins and metabolits involved in ecophysiological adaptation of hagfish skeletal and cardiac muscles.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0731108-170212 |
| Date | 31 July 2008 |
| Creators | Chiu, Kuo-hsun |
| Contributors | Hsueh-Wen Chang, Ping-chun Hou, Chi-Ying Lee, Kwang-Tsao Shao, Hin-Kiu Mok, Shangwu Ding |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0731108-170212 |
| Rights | not_available, Copyright information available at source archive |
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