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Sea Cucumber Holothuria The Effects of Holothurin A on B16F10+GFP, Mouse Melanoma, in a Living Chick Embryo Table 1: Effects of Holothurin A on Swiss mice carrying an inoculation of 2X106 Krebs-2 cells Mean wt. No. Mg. No. Mean on 1st day of Sex Holothurin Holothurin Survival of Mice Injection Injection Time (days) Inoculation M 13.7 M 21.7gm. 12 F Controls Controls R 10-19 R 18-25 7 injections 8 M 8.5 M 21.6 6 F 0.01mg days R 5-10 R 19-23 7 injections 8 M 19 M 20.0 6 F 0.05mg days R 14-28 R 18.5-21 7 injections M 23.5 M 22.7 6 F 0.10 mg 16 days R 5-35 R 19-25 10 injections M 34.6 M 21.9 6 F 0.10mg 20 days R 8-51 R 19-25 Mean wt. on 10th day of Inoculation M 30.2gm. R26-33 INTRODUCTION •Next logical step in this research is to move the methods into a living organism •Finding out if B16F10 melanoma cancer cell line, grown in vivo, will be killed by M 23.2 Holothurin A R 19.3-25.5 M 20.6 •Using a chick embryo because it is R 16.7-25.2 immuno-deficient, easy to culture, M 20.6 inexpensive and a commonly used R 18-22.5 * M is the mean day of death or mean weight of mice; R is the range of variation animal model (Sullivan, Laude and Nigrelli 1955) •B16F10 is transfected with Green HYPOTHESIS Fluorescent Protein (GFP) so it will be •The concentration of medicine will not effect the observable on the chick and so the average weight of the chick embryos (Figure 3). number of cells can be easily quantified •The Holothurin A will kill the B16F10 cancer cell line (Figure 2). more effectively than Dacarbazine with in vivo Figure 1: Structure of Holothurin (? Et. al) inoculations. •The growing cancer will be directly observable and quantifiable by looking at the skin under black light and using a fluorescent plate reader after the chick has been sacrificed (Figure 4). Figure 2 Effects of Increasing Concentrations of Blasticidin on B16F10 Mouse Melanoma Cells Percent Viable Cells 125 100 75 50 25 0 0 5 10 15 20 25 Blasticidin mg/mL Figure Legend 2: Blasticidin kills the most B16F10 cells at 15ug/ml. This is the conc. used as the selecting agent when transfecting the GFP. Figure 3 Chick Weights Vs. Concentration of Medicine Added 20.0 Chick Embryo Weight (g) Department of Biological Sciences, York College REASEARCH DESIGN REVIEW OF LITERATURE •The dosage difference between “no effect” and “complete killing” is very small. Eggs (Nigrelli and Zahl 1954) •Toxic limit of Holothurin A, injected is between 0.1 and 0.2 mg in mice. B16F10+GFP is added In vivo – Day 10 •The Glycoside Holothurin A has 3 effects:1) Decreased ATPase activity 2) Experimental eggs Control eggs Increased permeability of membrane of 5 Groups of 4 8 total Holothurin A Saline the SR and uncouple calcium, 3) increase Day 12 Day 12 Experimental eggs permeability of the lipid layer of the 5 Groups of 4 Dacarbazine liposomes. (Rubtsov et. al 1981) Day 12 •Sea Cucumber glycosides such as Holothurin A are saponins whose mechanism comes from disrupting membrane structure and function. Embryos sacrificed 5 days after http://www.ext.vt.edu/resources/4h/virtualfarm/poultry/poultry_development.html OBSERVED RESULTS Jared J. Meehan and Dr. Jeffrey P. Thompson Ph.D. PROJECT SUMMARY There have been many medical breakthroughs in the field of cancer research within the past fifty years. Some treatment methods were derived from marine organisms. Previous research has shown that Holothurin A (Figure 1), a steroid glycoside released from a Bahamian sea cucumber (Actinopyga agassizi), can kill certain cancer cell lines. Older research focused mainly on experimenting with Krebs-2 ascites and sarcoma 180 tumors. However, recent research done by Jonathan Trager demonstrated that Holothurin A will induce apoptosis in the B16F10 mouse melanoma cancer cell line. Candled Chick egg day 9 http://departments.oxy.edu/tops/marinebio/organisms/PH24seacucumber.htm Holothurin Dacarbazine 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0.0 0 1 2 3 4 5 6 Concentration in mM Figure Legend 3: Control run of testing the viability of chick eggs to the treatment of Holothurin A and dacarbazine. Non-injected control eggs average weight was 22.67g with a standard deviation of 1.06g. original inoculation - Day 17 EXPECTED RESULTS Figure 4 Percent of cells showing GFP Fluorescence after Treatment Weigh embryos to find mean weight Observe all under black light as well as under fluorescent plate reader to see if any cancer growth occurred •Each day eggs are candled to make sure the embryo is still viable •Day 12 of growth is when the eggs are originally inoculated with the medicines •Day 17 eggs are put in freezer to be sacrificed •Eggs are cracked open and chicks mass is measured •Percentage scale measures how much of the body is covered by cancer under black light. 100 % of Fluorescent Cells B16F10 cells bright field microscope GFP producing B16F10 Cells Under GFP GFP producing Fluorescence Microscope Holothurin A Dacarbazine 75 50 25 0 0 1 2 3 4 5 6 Concentration in mM Figure legend 4: Holothurin A will kill the GFP expressing B16F10 cells. This graph shows the percent fluorescence at different concentrations. The Dacarbazine has little effect on the B16F10 cell line based on previous in vito data. LITERATURE CITED Friess, S. L., Standaert, F. G., Whitcomb, E. R., Nigrelli, R. F., Chanley, J. D., and Sobotka, H., 1960. Some pharmacological properties of Holothurin A, a glycosidic mixture from the Sea Cucumber. Annals New York Academy of Sciences. Kitagawa, I., Nishino, T., Kobayashi, M., and Kyogoku, Y., 1951. Bioactive Triterpene-Oligoglycosides from the Sea Cucumber Holothuria leucospilota. Chemical Pharmacy Bulletin. 29(7). Nigrelli, R. F., Stempien, M. F. Jr., Ruggieri, G. D., Liguorori, V. R., and Cecil, J. T. 1967. Substances of potential biomedical importance from marine organisms. Federation Proceedings. 26(4). Nigrelli, R. F., and Zahl, P. A., 1954. Some biological characteristics of Holothurin. New York Zoological Society. Popov, A. M., 2002. A comparative study of the hemolytic and cytotoxic activities of triterpenoids isolated from Ginseng and Sea Cucumbers. Biology Bulletin. 29(2). Rubtsov, B. V., Ruzhitskil, A. O., Klebanov, G. I., Sedov, A. M., and Vladimirov, Y. A., 1979. Effect of Triterpene Glycosides of marine invertebrates on permeability of biological and artificial membranes. Central Institute for Advanced Training of Physicians, Moscow. 3. Sullivan, T. D., Ladue, K. T., and Nigrelli, R. F., 1955. The effects of Holothurin, a steroid saponin of animal origin, on Krebs-2 Ascites tumors in Swiss mice. Zoologica: New York Zoological Society. 40(5). ACKNOWLEDGMENTS Dr. Thompson, Jonathan Trager, and the York College Biology Department.