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Journal club – “The value of hypothesis-driven research”

These days many cherish “hypothesis-driven” research and trash everything that is observational, exploratory and non-translational. And yet the hypothesis in many research is “post-research” hypothesis. The “hypothesis” itself is also often generated for the sake of having an hypothesis; the essence of the research can still be exploratory.

So when funding is getting scarce and the pressure of coming up with beautiful hypothesis is mounting, one must ask what the value of hypothesis-driven research is. Is it the only way to get important findings? Is it delivering more than other “inferior” approaches?

As I am thinking about these questions and situation all the time, I am leading a journal club in the lab on 8/1 and trying to discuss the philosophical aspects of this with my lab members. And I want to write this down and have a record before we do so. We will read a few articles:

  1. Pisani E. Has the internet changed science? Prospect 2010; 177:54 [pdf]
  2. Kell DB, Oliver SG. Here is the evidence, now what is the hypothesis? The complementary roles of inductive and hypothesis-driven science in the post-genomic era. Bioessays. 2004 Jan;26(1):99-105. PubMed PMID: 14696046.
  3. Ioannidis JP. Why most published research findings are false. PLoS Med. 2005 Aug;2(8):e124. Epub 2005 Aug 30. PubMed PMID: 16060722; PubMed Central PMCID: PMC1182327.

and discuss a few questions, in addition to the ones I have above:

  1. Are data mining or descriptive research useless?
  2. What are the downsides of doing “hypothesis-driven research”?
  3. Are we/funding agencies/authorities doing the society a favor by insisting scientists to have a hypothesis/justification attached to a research idea? how about research that has translational value (i.e. curing disease)? or technical value (e.g. developing a cheaper and faster way to sequence human genome?)
  4. Is/Can there a balance between different scientific research approaches?

2011-07-30 new articles we read this week

Animal model

  1. Aitman TJ, Boone C, Churchill GA, Hengartner MO, Mackay TF, Stemple DL. The future of model organisms in human disease research. Nat Rev Genet. 2011 Jul18;12(8):575-82. doi: 10.1038/nrg3047. PubMed PMID: 21765459.
  2. Thomas JL, Vihtelic TS, Dendekker AD, Willer G, Luo X, Murphy TR, Gregg RG, Hyde DR, Thummel R. The loss of vacuolar protein sorting 11 (vps11) causes retinal pathogenesis in a vertebrate model of syndromic albinism. Invest Ophthalmol Vis Sci. 2011 May 27. [Epub ahead of print] PubMed PMID: 21622697.

Systems biology

  1. Garcia HG, Phillips R. Quantitative dissection of the simple repression input-output function. Proc Natl Acad Sci U S A. 2011 Jul 19;108(29):12173-8.Epub 2011 Jul 5. PubMed PMID: 21730194.
  2. Schmidt A, Beck M, Malmström J, Lam H, Claassen M, Campbell D, Aebersold R. Absolute quantification of microbial proteomes at different states by directed mass spectrometry. Mol Syst Biol. 2011 Jul 19;7:510. doi: 10.1038/msb.2011.37. PubMed PMID: 21772258.
  3. Dahan O, Gingold H, Pilpel Y. Regulatory mechanisms and networks couple the different phases of gene expression. Trends Genet. 2011 Jul 13. [Epub ahead of print] PubMed PMID: 21763027.

Retinal development

  1. Brzezinski JA 4th, Kim EJ, Johnson JE, Reh TA. Ascl1 expression defines a subpopulation of lineage-restricted progenitors in the mammalian retina.Development. 2011 Jul 19. [Epub ahead of print] PubMed PMID: 21771810.

Ethics, Legal and Social Issues

  1. Dresser R. Families and forensic DNA profiles. Hastings Cent Rep. 2011 May-Jun;41(3):11-2. PubMed PMID: 21678805.
  2. Nelson L, Ashby B. Rethinking the ethics of physician participation in lethal injection execution. Hastings Cent Rep. 2011 May-Jun;41(3):28-37. PubMed PMID: 21678813.

2011-07-24 new articles we read this week

Delta-Notch, signal transduction

  1. Ohata S, Aoki R, Kinoshita S, Yamaguchi M, Tsuruoka-Kinoshita S, Tanaka H, Wada H, Watabe S, Tsuboi T, Masai I, Okamoto H. Dual roles of Notch in regulation of apically restricted mitosis and apicobasal polarity of neuroepithelial cells. Neuron. 2011 Jan 27;69(2):215-30. PubMed PMID: 21262462.

Ethical, Legal and Social Issues

  1. Mismeasure for mismeasure. Nature. 2011 Jun 22;474(7352):419. doi: 10.1038/474419a. PubMed PMID: 21697903.
  2. Lewis JE, Degusta D, Meyer MR, Monge JM, Mann AE, Holloway RL. The Mismeasure of Science: Stephen Jay Gould versus Samuel George Morton on Skulls and Bias. PLoS Biol. 2011 Jun;9(6):e1001071. Epub 2011 Jun 7. PubMed PMID: 21666803; PubMedCentral PMCID: PMC3110184.
  3. Ioannidis JP. Why most published research findings are false. PLoS Med. 2005 Aug;2(8):e124. Epub 2005 Aug 30. PubMed PMID: 16060722; PubMed Central PMCID:PMC1182327.

Gene regulatory network

  1. Amit R, Garcia HG, Phillips R, Fraser SE. Building enhancers from the ground up: a synthetic biology approach. Cell. 2011 Jul 8;146(1):105-18. PubMed PMID: 21729783.
  2. Frankel N, Erezyilmaz DF, McGregor AP, Wang S, Payre F, Stern DL. Morphological evolution caused by many subtle-effect substitutions in regulatory  DNA. Nature. 2011 Jun 29;474(7353):598-603. doi: 10.1038/nature10200. PubMedPMID: 21720363.
  3. Peter IS, Davidson EH. A gene regulatory network controlling the embryonic specification of endoderm. Nature. 2011 May 29;474(7353):635-9. doi: 10.1038/nature10100. PubMed PMID: 21623371.

Neurobiology

  1. Xiao T, Staub W, Robles E, Gosse NJ, Cole GJ, Baier H. Assembly of Lamina-Specific Neuronal Connections by Slit Bound to Type IV Collagen. Cell.2011 Jul 8;146(1):164-76. PubMed PMID: 21729787.

Zebrafish

  1. Lauter G, Söll I, Hauptmann G. Two-color fluorescent in situ hybridization in  the embryonic zebrafish brain using differential detection systems. BMC Dev Biol. 2011 Jul 4;11:43. PubMed PMID: 21726453.

Fun Read

20 Things You Didn’t Know About… 20 Things You Didn’t Know About… DNA

http://discovermagazine.com/2011/apr/20-things-you-didnt-know-about-dna

2011-06-11 new articles we read this week

Delta-Notch

  1. Niwa Y, Shimojo H, Isomura A, González A, Miyachi H, Kageyama R. Different types of oscillations in Notch and Fgf signaling regulate the spatiotemporal periodicity of somitogenesis. Genes Dev. 2011 Jun 1;25(11):1115-20. PubMed PMID: 21632822.

Retina

  1. Robinson R. After 40 years, retina reveals it uses positive feedback, as well as negative. PLoS Biol. 2011 May;9(5):e1001058. Epub 2011 May 3. PubMed PMID:21572905; PubMed Central PMCID: PMC3092782.

Stem cells

  1. Neuron’s Reviews on Neural Stem Cells and Neurogenesis

Gene regulatory network

  1. Peter IS, Davidson EH. A gene regulatory network controlling the embryonic specification of endoderm. Nature. 2011 May 29. [Epub ahead of print] PubMed PMID: 21623371.

2011-06-04 new articles we read this week

Gene regulatory network

  1. Walhout AJ. What does biologically meaningful mean? A perspective on generegulatory network validation. Genome Biol. 2011 Apr 11;12(4):109. [Epub ahead ofprint] PubMed PMID: 21489330.
  2. Su WL, Kleinhanz RR, Schadt EE. Characterizing the role of miRNAs within gene regulatory networks using integrative genomics techniques. Mol Syst Biol. 2011 May 24;7:490. PubMed PMID: 21613979.
  3. Yu H, Tardivo L, Tam S, Weiner E, Gebreab F, Fan C, Svrzikapa N, Hirozane-Kishikawa T, Rietman E, Yang X, Sahalie J, Salehi-Ashtiani K, Hao T, Cusick ME, Hill DE, Roth FP, Braun P, Vidal M. Next-generation sequencing to generate interactome datasets. Nat Methods. 2011 Apr 24. [Epub ahead of print] PubMed PMID: 21516116.
  4. Emmert-Streib F, Glazko GV. Pathway analysis of expression data: deciphering functional building blocks of complex diseases. PLoS Comput Biol. 2011 May;7(5):e1002053. Epub 2011 May 26. PubMed PMID: 21637797.

Systems Biology

  1. Oswald A, Oates AC. Control of endogenous gene expression timing by introns.Genome Biol. 2011 Mar 29;12(3):107. [Epub ahead of print] PubMed PMID: 21463534.
  2. Pourquié O. Vertebrate segmentation: from cyclic gene networks to scoliosis. Cell. 2011 May 27;145(5):650-63. PubMed PMID: 21620133

Retina

  1. Nevin LM, Xiao T, Staub W, Baier H. Topoisomerase II{beta} is required for lamina-specific targeting of retinal ganglion cell axons and dendrites.Development. 2011 Jun;138(12):2457-65. PubMed PMID: 21610027.

Development

  1. Pottin K, Hinaux H, Rétaux S. Restoring eye size in Astyanax mexicanus blind cavefish embryos through modulation of the Shh and Fgf8 forebrain organisingcentres. Development. 2011 Jun;138(12):2467-76. PubMed PMID: 21610028.

Delta-Notch

  1. Acosta H, López SL, Revinski DR, Carrasco AE. Notch destabilises maternal {beta}-catenin and restricts dorsal-anterior development in Xenopus. Development.2011 Jun;138(12):2567-79. PubMed PMID: 21610033.

Eye disease

  1. Zhang T, Zhang N, Baehr W, Fu Y. Cone opsin determines the time course of cone photoreceptor degeneration in Leber congenital amaurosis. Proc Natl Acad Sci U S A. 2011 May 24;108(21):8879-84. Epub 2011 May 9. PubMed PMID: 21555576.

Neurobiology

  1. Park M, Watanabe S, Poon VY, Ou CY, Jorgensen EM, Shen K. CYY-1/Cyclin Y and CDK-5 Differentially Regulate Synapse Elimination and Formation for RewiringNeural Circuits. Neuron. 2011 May 26;70(4):742-57. PubMed PMID: 21609829.
  2. Wolf L, Goldberg C, Manor N, Sharan R, Ruppin E. Gene Expression in the Rodent Brain is Associated with Its Regional Connectivity. PLoS Comput Biol. 2011 May;7(5):e1002040. Epub 2011 May 5. PubMed PMID: 21573208; PubMed Central PMCID:  PMC3088660.

Imaging

  1. Shu X, Lev-Ram V, Deerinck TJ, Qi Y, Ramko EB, Davidson MW, Jin Y, Ellisman MH, Tsien RY. A genetically encoded tag for correlated light and electron microscopy of intact cells, tissues, and organisms. PLoS Biol. 2011 Apr;9(4):e1001041. Epub 2011 Apr 5. PubMed PMID: 21483721; PubMed Central PMCID:  PMC3071375.
  2. Jones SA, Shim SH, He J, Zhuang X. Fast, three-dimensional super-resolution imaging of live cells. Nat Methods. 2011 May 8. [Epub ahead of print] PubMed PMID: 21552254.
  3. Peravali R, Gehrig J, Giselbrecht S, Lütjohann DS, Hadzhiev Y, Müller F, Liebel U. Automated feature detection and imaging for high-resolution screening of zebrafish embryos. Biotechniques. 2011 May;50(5):319-24. PubMed PMID: 21548893.

Genomics

  1. Richard H, Schulz MH, Sultan M, Nürnberger A, Schrinner S, Balzereit D, Dagand E, Rasche A, Lehrach H, Vingron M, Haas SA, Yaspo ML. Prediction of alternative isoforms from exon expression levels in RNA-Seq experiments. Nucleic Acids Res. 2010 Jun;38(10):e112. Epub 2010 Feb 11. PubMed PMID: 20150413; PubMed CentralPMCID: PMC2879520.
  2. Baker M. Microarrays, megasynthesis. Nat Methods. 2011 Jun;8(6):457-60. PubMed PMID: 21623349.

Zebrafish

  1. Clark KJ, Balciunas D, Pogoda HM, Ding Y, Westcot SE, Bedell VM, Greenwood TM, Urban MD, Skuster KJ, Petzold AM, Ni J, Nielsen AL, Patowary A, Scaria V, Sivasubbu S, Xu X, Hammerschmidt M, Ekker SC. In vivo protein trapping produces a functional expression codex of the vertebrate proteome. Nat Methods. 2011 May 8.  [Epub ahead of print] PubMed PMID: 21552255.
    • Mullins MC. All-in-one live: genes trapped, tagged and conditionally broken. Nat Methods. 2011 Jun;8(6):466-7. PubMed PMID: 21623352.

Stem cells

  1. Hayden EC. Stem cells: The growing pains of pluripotency. Nature. 2011 May 19;473(7347):272-4. PubMed PMID: 21593837.


 

2011-05-29 new articles we read this week

Eye diseases

  1. Sheffield VC, Stone EM. Genomics and the eye. N Engl J Med. 2011 May 19;364(20):1932-42. PubMed PMID: 21591945.

Regeneration

  1. Tu S, Johnson SL. Fate restriction in the growing and regenerating zebrafish fin. Dev Cell. 2011 May 17;20(5):725-32. PubMed PMID: 21571228; PubMed CentralPMCID: PMC3096007.
  2. Knopf F, Hammond C, Chekuru A, Kurth T, Hans S, Weber CW, Mahatma G, Fisher S, Brand M, Schulte-Merker S, Weidinger G. Bone Regenerates via Dedifferentiation of Osteoblasts in the Zebrafish Fin. Dev Cell. 2011 May 17;20(5):713-24. PubMedPMID: 21571227.

Vision

  1. Ullrich-Lüter EM, Dupont S, Arboleda E, Hausen H, Arnone MI. Unique system of photoreceptors in sea urchin tube feet. Proc Natl Acad Sci U S A. 2011 May17;108(20):8367-72. Epub 2011 May 2. PubMed PMID: 21536888.
  2. Cerveny KL, Varga M, Wilson SW. Continued growth and circuit building in the anamniote visual system. Dev Neurobiol. 2011 May 11.  [Epub ahead of print] PubMed PMID: 21563317.

Behavior

  1. Rihel J, Schier AF. Behavioral screening for neuroactive drugs in zebrafish. Dev Neurobiol. 2011 May 12. [Epub ahead of print] PubMed PMID: 21567979.

Brg1

  1. Bock VL, Lyons JG, Huang XX, Jones AM, McDonald LA, Scolyer RA, Moloney FJ, Barnetson RS, Halliday GM. BRM and BRG1 subunits of the SWI/SNF chromatin remodelling complex are downregulated upon progression of benign skin lesions into invasive tumours. Br J Dermatol. 2011 Feb 24. doi: 10.1111/j.1365-2133.2011.10267.x. [Epub ahead of print] PubMed PMID: 21564052.
  2. Hasselblatt M, Gesk S, Oyen F, Rossi S, Viscardi E, Giangaspero F, Giannini C, Judkins AR, Frühwald MC, Obser T, Schneppenheim R, Siebert R, Paulus W. Nonsense Mutation and Inactivation of SMARCA4 (BRG1) in an Atypical Teratoid/Rhabdoid Tumor Showing Retained SMARCB1 (INI1) Expression. Am J Surg Pathol. 2011 Jun;35(6):933-935. PubMed PMID: 21566516.
  3. Reisman D, Glaros S, Thompson EA. The SWI/SNF complex and cancer. Oncogene. 2009 Apr 9;28(14):1653-68. Epub 2009 Feb 23. Review. PubMed PMID: 19234488.

Wisdom from a retiring community college English teacher

From If the dog ate your homework, read this:

There are always excuses for not showing up, or not turning work in. I’ve heard them all. But lives built on excuses generally don’t turn out well.

Few people care whether you succeed or fail. You are not showing up to class for your teachers or even your parents. You’re not doing these assignments for anyone but yourselves.

Life has a way of getting serious with us well before some of us decide to get serious with it. By that time, it may be too late to build the life you might have wanted.

 

How to fund research so that it generates insanely great ideas, not pretty good ones.

An interesting article “Positive Black Swans” by Tim Harford From Slate

Still, after a few years, Capecchi had decided that Harvard was not for him. Despite great resources, inspiring colleagues and a supportive mentor in Watson, he found the Harvard environment demanded results in too much of a hurry. That was fine, if you wanted to take predictable steps along well-signposted pathways. But Capecchi felt that if you wanted to do great work, to change the world, you had to give yourself space to breathe. Harvard, he thought, had become “a bastion of short-term gratification.” Off he went instead to the University of Utah, where a brand-new department was being set up. He had spotted, in Utah, a Galapagan island on which to develop his ideas.

Mario Capecchi developed the approach for generating knock0ut mice and received the Nobel Prize in Physiology or Medicine 2007.

2011-05-21 new articles we read this week

Evolution

  1. Moczek AP. Evolutionary biology: the origins of novelty. Nature. 2011 May 5;473(7345):34-5. PubMed PMID: 21544136.
  2. Tena JJ, Alonso ME, de la Calle-Mustienes E, Splinter E, de Laat W, Manzanares M, Gómez-Skarmeta JL. An evolutionarily conserved three-dimensional structure in the vertebrate Irx clusters facilitates enhancer sharing and coregulation. Nat Commun. 2011;2:310. PubMed PMID: 21556064.
  3. Tirosh I, Reikhav S, Levy AA, Barkai N. A yeast hybrid provides insight into the evolution of gene expression regulation. Science. 2009 May 1;324(5927):659-62. PubMed PMID: 19407207.
  4. Kasowski M, Grubert F, Heffelfinger C, Hariharan M, Asabere A, Waszak SM, Habegger L, Rozowsky J, Shi M, Urban AE, Hong MY, Karczewski KJ, Huber W, Weissman SM, Gerstein MB, Korbel JO, Snyder M. Variation in transcription factor binding among humans. Science. 2010 Apr 9;328(5975):232-5. Epub 2010 Mar 18. PubMed PMID: 20299548; PubMed Central PMCID: PMC2938768.
  5. Landry CR, Lemos B, Rifkin SA, Dickinson WJ, Hartl DL. Genetic properties influencing the evolvability of gene expression. Science. 2007 Jul 6;317(5834):118-21. Epub 2007 May 24. PubMed PMID: 17525304.

Systems Biology

  1. Green RA, Kao HL, Audhya A, Arur S, Mayers JR, Fridolfsson HN, Schulman M, Schloissnig S, Niessen S, Laband K, Wang S, Starr DA, Hyman AA, Schedl T, Desai A, Piano F, Gunsalus KC, Oegema K. A High-Resolution C. elegans Essential Gene Network Based on Phenotypic Profiling of a Complex Tissue. Cell. 2011 Apr29;145(3):470-82. PubMed PMID: 21529718; PubMed Central PMCID: PMC3086541.
  2. Liu YY, Slotine JJ, Barabási AL. Controllability of complex networks. Nature. 2011 May 12;473(7346):167-73. PubMed PMID: 21562557.
    • Commentary: Egerstedt M. Complex networks: Degrees of control. Nature. 2011 May 12;473(7346):158-9. PubMed PMID: 21562550.

Genomics

  1. Ernst J, Kheradpour P, Mikkelsen TS, Shoresh N, Ward LD, Epstein CB, Zhang X, Wang L, Issner R, Coyne M, Ku M, Durham T, Kellis M, Bernstein BE. Mapping and analysis of chromatin state dynamics in nine human cell types. Nature. 2011 May 5;473(7345):43-9. Epub 2011 Mar 23. PubMed PMID: 21441907; PubMed Central PMCID: PMC3088773.
  2. Tasic B, Hippenmeyer S, Wang C, Gamboa M, Zong H, Chen-Tsai Y, Luo L. From the Cover: Site-specific integrase-mediated transgenesis in mice via pronuclear injection. Proc Natl Acad Sci U S A. 2011 May 10;108(19):7902-7. Epub 2011 Apr 4. PubMed PMID: 21464299.

Stem cells

  1. Rao M. Keeping things simple. Nat Methods. 2011 May;8(5):389-90. PubMed PMID: 21527929.
  2. Kim J, Efe JA, Zhu S, Talantova M, Yuan X, Wang S, Lipton SA, Zhang K, Ding S. Direct reprogramming of mouse fibroblasts to neural progenitors. Proc Natl Acad Sci U S A. 2011 May 10;108(19):7838-43. Epub 2011 Apr 26. PubMed PMID: 21521790.
  3. Brennand KJ, Simone A, Jou J, Gelboin-Burkhart C, Tran N, Sangar S, Li Y, Mu Y, Chen G, Yu D, McCarthy S, Sebat J, Gage FH. Modelling schizophrenia using human induced pluripotent stem cells. Nature. 2011 May 12;473(7346):221-5. Epub 2011 Apr 13. PubMed PMID: 21490598.

Development

  1. Quillien A, Blanco-Sanchez B, Halluin C, Moore JC, Lawson ND, Blader P, Cau E. BMP signaling orchestrates photoreceptor specification in the zebrafish pineal gland in collaboration with Notch. Development. 2011 Jun;138(11):2293-302. PubMed PMID: 21558377.
  2. Clanton JA, Shestopalov I, Chen J, Gamse JT. Lineage labeling of zebrafish cells with laser uncagable fluorescein dextran. J Vis Exp. 2011 Apr 28;(50). pii: 2672. doi: 10.3791/2672. PubMed PMID: 21559005.