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Generation and partial characterization of a transformed cetacean cell line
1Department of Anatomy and Public Health and Center for Environmental and Rural Health, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843, USA.
Aquatic Toxicology (Amsterdam, Netherlands)
|March 9, 2004
Summary
This study established an immortalized bottlenose dolphin epithelial cell line (DKN1). These cells have unique nutrient requirements, differing from terrestrial mammals, and show reduced growth with high antioxidant levels.
Area of Science:
- Marine Mammal Biology
- Cell Biology
- Biotechnology
Background:
- Primary epithelial cell lines are crucial for studying species-specific cellular functions.
- Establishing immortalized cell lines from marine mammals presents unique challenges.
- Understanding nutrient requirements is vital for effective cell culture and research.
Purpose of the Study:
- To establish and characterize a novel immortalized epithelial cell line from Atlantic bottlenose dolphin renal tissue.
- To investigate the nutrient requirements, specifically l-glutamine and antioxidants, of the dolphin cell line.
- To compare the cellular characteristics of the dolphin cell line with those of terrestrial mammalian cells.
Main Methods:
- Development of a primary epithelial cell line (DK1) from dolphin renal tissue.
- Transfection with a plasmid encoding SV40 large tumor antigen (Tag) for immortalization.
- Culturing and selection of clones (DKN1) in specialized medium with geneticin (G418).
- Assessment of intracellular cytokeratin and Tag expression.
- Evaluation of cell growth under varying concentrations of l-glutamine, glutathione (GSH), and N-acetylcysteine (NAC).
Main Results:
- The immortalized dolphin epithelial cell line (DKN1) was successfully established and maintained for 8 years.
- DKN1 cells did not exhibit the high l-glutamine requirement previously reported for cetacean cells.
- Addition of antioxidants (GSH and NAC) at 2.0mM decreased DKN1 cell division and viability.
- These findings indicate distinct glutathione levels and requirements compared to terrestrial mammalian cells.
Conclusions:
- The immortalized DKN1 cell line provides a valuable model for studying bottlenose dolphin cellular biology.
- DKN1 cells display unique metabolic characteristics, including lower l-glutamine needs and sensitivity to high antioxidant concentrations.
- The study highlights significant differences in glutathione metabolism and requirements between marine and terrestrial mammalian cells.
