Resveratrol and decreased fat deposition in c elegans
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Resveratrol and Decreased Fat Deposition in C. elegans. Alexandra ******- Period 3 Manhasset Science Research. Need. Obesity Trends* Among U.S. Adults 1990, 1998, 2007. (*BMI  30, or about 30 lbs. overweight for 5’4” person). 1998. 1990. 2007.

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Resveratrol and Decreased Fat Deposition in C. elegans

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Resveratrol and Decreased Fat Deposition in C. elegans

Alexandra ******- Period 3

Manhasset Science Research


Need

Obesity Trends* Among U.S. Adults1990, 1998, 2007

(*BMI 30, or about 30 lbs. overweight for 5’4” person)

1998

1990

2007

No Data <10% 10%–14% 15%–19% 20%–24% 25%–29% ≥30%

Source: Center for Disease Control & Prevention [http://www.cdc.gov/nccdphp/dnpa/obesity/trend/maps/obesity_trends_2007.ppt#487,5,Slide 5]


Knowledge Base

Figure 1: Chemical structure of Nile Red (A) & Sudan Black (B) staining. Nile Red staining in wild-type and mutant C. elegans (C-E). Sudan Black staining in wild-type (F) & mutant (G) organisms.

Source: (Ashrafi, 2007) [http://www.wormbook.org/chapters/www_obesity/obesity.html]


Resveratrol

  • Chemical found in grapes; red wine

  • Popular dietary supplement- advertised as anti-aging substance

  • May explain “French paradox”

Figure 2: chemical structure of resveratrol (C14H12O3)

[http://www.3dchem.com/molecules.asp?ID=277]


Literature Review

Figure 2: RNAi was used to silence certain genes to determine which ones regulated fat in C. elegans (Ashrafi, et al, 2003) [chart made by author using materials from article]


Literature Review

  • C. elegans in dauer need AMP-activated protein kinase (AMPK) to survive

    • Dauer- larval “hibernation” stage in which metabolic rate is slowed; fat deposits increase to sustain organism

    • AMPK- fat regulatory enzyme

  • aak2 mutant dauers lack AMPK destroy fat

  • (Roy, et al, 2009)

Figure 3: The enzyme AMPK is necessary for C. elegans in dauer to survive and regulate fat deposition (Roy, et al, 2009) [chart created by author]


Literature Review

  • Resveratrol improves health and survival of mice on a high-calorie diet

  • (Baur, et al, 2006)

Figure 4: Resveratrol caused many positive changes in the overall health of mice similar to the effects of caloric restriction

(Baur, et al, 2006) [chart made by author adapted from article]


Literature Review

Figure 5: In human preadipocytes (fat cell precursors), resveratrol in extremely high doses (3-5 g) caused positive changes in the cells. (Fischer-Posovsky, et al, 2008) [chart made by author]


Purpose/Hypothesis

  • Purpose: to observe the effects of resveratrol on fat deposition in C. elegans and compare it to caloric restriction

  • Null hypothesis: Resveratrol will cause no change in fat deposition in C. elegans

  • Alternate hypothesis: Resveratrol will cause a decrease in fat deposition and mimic the effects of caloric restriction


Methodology


Budget

Total Price: $205.20


Do-ability

  • Resveratrol studies have been done in previous years

  • C. elegans is a useful model organism that is easily obtained

  • Sudan Black staining and fluorescent microscope examination are possible


Bibliography

  • Ashrafi, K. Obesity and the regulation of fat metabolism (March 9, 2007), , ed. The Research Community, WormBook, doi/10.1895/wormbook.1.130.1, <http://www.wormbook.org/chapters/www_obesity/obesity.html>.

  • Ashrafi, Kaveh, Francesca Y. Chang, Jennifer L Watts, Andrew G. Fraser, Ravi S. Kamath, Julie Ahringer, and Gary Ruvkin. “Genome-wide RNAi analysis of Caenorhabditis elegans fat regulatory genes.” Nature (2003): 268-72

  • Baur, Joseph A., Kevin J. Pearson, Nathan L. Price, Hamish A. Jamieson, Charles Lerin, Avash Kalra, Vinayakumar V. Prabhu, Joanne Sl Allard, Guillermo Lopez-Lluch, Kaitlyn Lewis, Paul J. Pistell, Suresh Poosala, Kevin G. Becker, Olivier Boss, Dana Gwinn, Mingyi Want, Sharan Ramaswamy, Kenneth W. Fishbein, Richard G. Spencer, Edward G. Lakatta, David Le Couteur, Reuben J. Shaw, Placido Navas, Pere Puigserver, Donald K. Ingram, Rafael de Cabo & David A. Sinclair. “Resveratrol improves health and survival of mice on a high-calorie diet.” Nature (2009) Vol. 444.

  • Dasgupta, Biplab and Jeffrey Milbrandt. “Resveratrol stimulates AMP kinase activity in neurons.” Proceedings of the National Academy of Sciences of the United States of America. 2007, April 24: 104(17): 7217-7222

  • The Endocrine Society. "Red Wine's Resveratrol May Help Battle Obesity." ScienceDaily 17 June 2008. 4 June 2009 <http://www.sciencedaily.com­ /releases/2008/06/080616115850.htm>.

  • Roy, Richard and Patrick Narbonne. “Caenorhabditis elegans dauers need LKB1/AMPK to ration lipid reserves and ensure long-term survival.” Nature (2009) Vol. 457.

  • Stiernagle, Theresa. “Maintenance of C. elegans.” February 11, 2006), , ed. The Research Community, WormBook, doi/10.1895/wormbook.1.101.1, <http://www.wormbook.org/chapters/www_obesity/obesity.html>.


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