Posts tagged ‘longevity’

Stem cells

  1. Chen J, Pei D. Reprogramming in suspension. Nat Methods. 2012 Apr 27;9(5):449-51. doi: 10.1038/nmeth.1989. PubMed PMID: 22543375.

Genomics

  1. Clarke L, Zheng-Bradley X, Smith R, Kulesha E, Xiao C, Toneva I, Vaughan B, Preuss D, Leinonen R, Shumway M, Sherry S, Flicek P; The 1000 Genomes Project Consortium. The 1000 Genomes Project: data management and community access. Nat Methods. 2012 Apr 27;9(5):459-462. doi: 10.1038/nmeth.1974. PubMed PMID: 22543379; PubMed Central PMCID: PMC3340611.

Eye disease

  1. Pearson RA, Barber AC, Rizzi M, Hippert C, Xue T, West EL, Duran Y, Smith AJ, Chuang JZ, Azam SA, Luhmann UF, Benucci A, Sung CH, Bainbridge JW, Carandini M,Yau KW, Sowden JC, Ali RR. Restoration of vision after transplantation of photoreceptors. Nature. 2012 May 3;485(7396):99-103. PubMed PMID: 22522934.

Genetic disease

  1. Whalley K. Neurodevelopmental disorders: Reversing the fragile X phenotype. Nat Rev Neurosci. 2012 May 3. doi: 10.1038/nrn3255. [Epub ahead of print] PubMed PMID: 22551664.

Systems biology

  1. Zhu J, Sova P, Xu Q, Dombek KM, Xu EY, Vu H, Tu Z, Brem RB, Bumgarner RE, Schadt EE. Stitching together Multiple Data Dimensions Reveals Interacting Metabolomic and Transcriptomic Networks That Modulate Cell Regulation. PLoS Biol. 2012 Apr;10(4):e1001301. Epub 2012 Apr 3. PubMed PMID: 22509135; PubMed Central PMCID: PMC3317911.

Medicine

  1. Freedman ND, Park Y, Abnet CC, Hollenbeck AR, Sinha R. Association of coffee drinking with total and cause-specific mortality. N Engl J Med. 2012 May 17;366(20):1891-904. PubMed PMID: 22591295.

 

Naked mole rat from Wikipedia

The genome sequence of the naked mole rat is published recently (Kim et al., 2011) ! This is an amazing creature that lives almost up to 30 years in captivity, 9 times longer than mice. At the same time they do not seem to suffer from cancer or a decline in fertility (Buffenstein 2008).

I have been fascinated by the research on the naked mole rats since I read an research article published by Vera Gorbunova’s group in 2009 (Seluanov et al., 2009). In this study, the authors elucidated the naturally occurred anti-cancer mechanism inside this creature. As it turns out, the cells from the naked mole rat will initiate a program to turn off cell growth as soon as the cells start touching each other in culture, a much earlier response than that in regular rats or mice. The most impressive finding is that this early program that can turn off cell growth actually uses the same cell division control mechanisms as in us, but it is just fine-tuned to respond to growth more sensitively. In the new study that sequenced the genome of the naked mole rat, a number of interesting findings have been found and may reveal other aspects of its longevity and physiology for this success and etc. I will save this for your own personal reading.

I find all these results beautiful and  powerfully remind us how studying our nature can lead to potentially important findings that can “translate” to human health; and how the “traditional” clinical research on human and classical animal models can miss the answer that is already out there.

Extended readings

  1. Buffenstein R. Negligible senescence in the longest living rodent, the naked mole-rat: insights from a successfully aging species. J Comp Physiol B. 2008 May;178(4):439-45. Epub 2008 Jan 8. Review. PubMed PMID: 18180931.
  2. Kim EB et al., Genome sequencing reveals insights into physiology and longevity of the naked mole rat. Nature. 2011 Oct 12. doi: 10.1038/nature10533. [Epub ahead of print] PubMed PMID: 21993625.
  3. Seluanov A et al., Hypersensitivity to contact inhibition provides a clue to cancer resistance of naked mole-rat. Proc Natl Acad Sci U S A. 2009 Nov 17;106(46):19352-7. Epub 2009 Oct 26. PubMed PMID: 19858485; PubMed Central PMCID: PMC2780760.

				

may lie inside this girl.

Brooke Greenberg is the size of an infant, with the mental capacity of a toddler. She turned 16 in January.

….

Brooke hasn’t aged in the conventional sense. Dr. Richard Walker of the University of South Florida College of Medicine, in Tampa, says Brooke’s body is not developing as a coordinated unit, but as independent parts that are out of sync. She has never been diagnosed with any known genetic syndrome or chromosomal abnormality that would help explain why.

References:

Doctors Baffled, Intrigued by Girl Who Doesn’t Age [ABC news]

Walker RF. A case study of ‘‘disorganized development’’ and its possible relevance to genetic determinants of aging. Mech Age Devel 2009; 130:350 [PubMed][pdf (link provided by the research group's site)]