Abstract
Systems biology, possibly the latest sub-discipline of biology, has arisen as a result of the shockwave of genomic and proteomic data that has appeared in the past few years. However, despite ubiquitous initiatives that carry this label, there is no precise definition of systems biology other than the implication of a new, all-encompassing, multidisciplinary endeavor. Here we propose that systems biology is more than the integration of biology with methods of the physical and computational sciences, and also more than the expansion of the single-pathway approach to embracing genome-scale networks. It is the discipline that specifically addresses the fundamental properties of the complexity that living systems represent. To facilitate the discussion, we dissect and project the multifaceted systems complexity of living organisms into five dimensions: (1) molecular complexity; (2) structural complexity; (3) temporal complexity; (4) abstraction and emergence; and (5) algorithmic complexity. This “five-dimensional space” may provide a framework for comparing, classifying, and complementing the vast diversity of existing systems biology programs and their goals, and will also give a glimpse of the magnitude of the scientific problems associated with unraveling the ultimate mysteries of life.
References
Aebersold R (2005) Molecular systems biology: a new journal for a new biology? Mol Sys Biol 1:msb4100009 E1–E2
Aebersold R, Hood LE, Watts JD (2000) Equipping scientists for the new biology. Nat Biotechnol 18:359
Albert R, Jeong H, Barabasi AL (2000) Error and attack tolerance of complex networks. Nature 406:378–382
Alon U (2003) Biological networks: the tinkerer as an engineer. Science 301:1866–1867
Alon U, Surette MG, Barkai N, Leibler S (1999) Robustness in bacterial chemotaxis. Nature 397:168–171
Anderson PW (1972) More is different: broken symmetry and the nature of the hierarchical structure of science. Science 177:393–396
Ashby WR (1964) An introduction to cybernetics. Routledge, Kegan and Paul, London
Autumn K, Ryan MJ, Wake DB (2002) Integrating historical and mechanistic biology enhances the study of adaptation. Q Rev Biol 77:383–408
Balaban NQ, Merrin J, Chait R, Kowalik L, Leibler S (2004) Bacterial persistence as a phenotypic switch. Science 305:1622–1625
Ball P (2001) The self-made tapestry: pattern formation in nature. Oxford University Press, Oxford
Bar-Yam Y (1997) Dynamics of complex systems. Perseus Books, Reading
Bar-Yam Y (2004) Multiscale variety in complex systems. Complexity 9:37–45
Barabasi AL, Albert R (1999) Emergence of scaling in random networks. Science 286:509–512
Barabasi AL, Oltvai ZN (2004) Network biology: understanding the cell's functional organization. Nat Rev Genet 5:101–113
Barkai N, Leibler S (2000) Circadian clocks limited by noise. Nature 403:267–268
Blackett PMS (1963) Memories of Rutherford. In: Birks JB (ed) Rutherford at Manchester. Benjamin, New York, p 108
Bassingthwaighte JB, Liebovitch LS, West BJ (1994) Fractal physiology. Oxford University Press, New York
Braich RS, Chelyapov N, Johnson C, Rothemund PWK, Adleman L (2002) Solution of a 20-variable 3-SAT problem on a DNA computer. Science 296:499–502
Bray D (1997) Reductionism for biochemists: how to survive the protein jungle. Trends Biochem Sci 22:325–326
Brent R (2000) Genomic biology. Cell 100:169–183
Brown JH, Gupta VK, Li BL, Milne BT, Restrepo C, West GB (2002) The fractal nature of nature: power laws, ecological complexity and biodiversity. Philos Trans R Soc Lond B Biol Sci 357:619–626
Carlson JM, Doyle J (2002) Complexity and robustness. Proc Natl Acad Sci USA 99:2538–2545
Cauwenberghs G (1995) A micropower CMOS algorithmic A/D/A converter. IEEE T Circuits Syst I 42:913–919
Cherry EM, Greenside HS, Henriquez CS (2000) A space-time adaptive method for simulating complex cardiac dynamics. Phys Rev Lett 84:1343–1346
Corning PA (2002) The re-emergence of “emergence”: a venerable concept in search of a theory. Complexity 7:18–30
Cross SS (1997) Fractals in pathology. J Pathol 182:1–8
Cummings DAT, Irizarry RA, Huang NE, Endy TP, Nisalak A, Ungchusak K, Burke DS (2004) Travelling waves in the occurrence of dengue haemorrhagic fever in Thailand. Nature 427:344–347
D'haeseleer P, Liang SD, Somogyi R (2000) Genetic network inference: from co-expression clustering to reverse engineering. Bioinformatics 16:707–726
Davidson EH, Rast JP, Oliveri P, Ransick A, Calestani C, Yuh CH, Minokawa T, Amore G, Hinman V, Arenas-Mena C, Otim O, Brown CT, Livi CB, Lee PY, Revilla R, Rust AG, Pan ZJ, Schilstra MJ, Clarke PJC, Arnone MI, Rowen L, Cameron RA, McClay DR, Hood L, Bolouri H (2002) A genomic regulatory network for development. Science 295:1669–1678
Dawkins R (1996) The blind watchmaker: why the evidence of evolution reveals a universe without design. Norton, New York
Dretske FI (2000) Perception, knowledge, and belief: selected essays. Cambridge University Press, Cambridge
Eklund SE, Taylor D, Kozlov E, Prokop A, Cliffel DE (2004) A microphysiometer for simultaneous measurement of changes in extracellular glucose, lactate, oxygen, and acidification rate. Anal Chem 76:519–527
Elsasser WM (1998) Reflections on a theory of organisms: holism in biology. Johns Hopkins University Press, Baltimore
Endy D, Brent R (2001) Modelling cellular behaviour. Nature 409:391–395
Enver T, Heyworth CM, Dexter TM (1998) Do stem cells play dice? Blood 92:348–351
Ermentrout GB, Edelsteinkeshet L (1993) Cellular automata approaches to biological modeling. J Theor Biol 160:97–133
Evans GA (2000) Designer science and the “omic” revolution. Nat Biotechnol 18:127
Ferrell JE, Machleder EM (1998) The biochemical basis of an all-or-none cell fate switch in Xenopus oocytes. Science 280:895–898
Fitzhugh R (1961) Impulses and physiological states in theoretical models of nerve membrane. Biophys J 1:445–466
Freitas RA Jr (2002) The future of nanofabrication and molecular scale devices in nanomedicine. Stud Health Technol Inform 80:45–59
Gardner TS, di Bernardo D, Lorenz D, Collins JJ (2003) Inferring genetic networks and identifying compound mode of action via expression profiling. Science 301:102–105
Ge H, Walhout AJM, Vidal M (2003) Integrating ‘omic’ information: a bridge between genomics and systems biology. Trends Genet 19:551–560
Gell-Mann M (1995) The quark and the jaguar: adventures in the simple and the complex. WH Freeman, New York
Glass L (2001) Synchronization and rhythmic processes in physiology. Nature 410:277–284
Gleick J (1988) Chaos: making a new science. Penguin, New York
Goldberger AL, Amaral LAN, Hausdorff JM, Ivanov PC, Peng CK, Stanley HE (2002) Fractal dynamics in physiology: alterations with disease and aging. Proc Natl Acad Sci USA 99:2466–2472
Goodwin BC (2001) How the leopard changed its spots: the evolution of complexity. Princeton University Press, Princeton
Goodwin BC, Kauffman S, Murray JD (1993) Is morphogenesis an intrinsically robust process? J Theor Biol 163:135–144
Gould SJ (2002) The structure of evolutionary theory. Belknap Press of Harvard University Press, Cambridge
Gould SJ, Lewontin RC (1979) The spandrels of San Marco and the Panglossian paradigm: a critique of the adaptationist programme. Proc R Soc Lond B Biol Sci 205:581–598
Graveley BR (2001) Alternative splicing: increasing diversity in the proteomic world. Trends Genet 17:100–107
Gray RA, Jalife J, Panfilov AV, Baxter WT, Cabo C, Davidenko JM, Pertsov AM (1995) Nonstationary vortexlike reentrant activity as a mechanism of polymorphic ventricular tachycardia in the isolated rabbit heart. Circulation 91:2454–2469
Hall D, Minton AP (2003) Macromolecular crowding: qualitative and semiquantitative successes, quantitative challenges. Biochim Biophys Acta 1649:127–139
Hasty J, Pradines J, Dolnik M, Collins JJ (2000) Noise-based switches and amplifiers for gene expression. Proc Natl Acad Sci USA 97:2075–2080
Horgan J (1995) From complexity to perplexity. Sci Am 272:104–109
Huang S (2004) Back to the biology in systems biology: what can we learn from biomolecular networks? Brief Funct Genomic Proteomic 2:279–297
Huang S (2005) Multistability and multicellularity: cell fates as high-dimensional attractors of gene regulatory networks. In: Kriete A,Eils R (eds) Computational systems biology. Elsevier, Amsterdam, pp 293–326
Huang S, Eichler G, Bar-Yam Y, Ingber DE (2005) Cell fates as high-dimensional attractor states of a complex gene regulatory network. Phys Rev Lett 94:128701
Hume DA (2000) Probability in transcriptional regulation and its implications for leukocyte differentiation and inducible gene expression. Blood 96:2323–2328
Ideker T, Galitski T, Hood L (2001) A new approach to decoding life: systems biology. Annu Rev Genomics Hum Genet 2:343–372
Imhof LA, Fudenberg D, Nowak MA (2005) Evolutionary cycles of cooperation and defection. Proc Natl Acad Sci USA 102:10797–10800
Ingber DE (1998) The architecture of life. Sci Am 278:48–57
Ingber DE (2003) Tensegrity I. Cell structure and hierarchical systems biology. J Cell Sci 116:1157–1173
Ivanov PC, Amaral LAN, Goldberger AL, Havlin S, Rosenblum MG, Struzik ZR, Stanley HE (1999) Multifractality in human heartbeat dynamics. Nature 399:461–465
Kaern M, Elston TC, Blake WJ, Collins JJ (2005) Stochasticity in gene expression: from theories to phenotypes. Nat Rev Genet 6:451–464
Kauffman SA (1993) The origins of order: self-organization and selection in evolution. Oxford University Press, New York
Kirschner M, Gerhart J, Mitchison T (2000) Molecular “vitalism”. Cell 100:79–88
Kitano H, Oda K, Kimura T, Matsuoka Y, Csete M, Doyle J, Muramatsu M (2004) Metabolic syndrome and robustness tradeoffs. Diabetes 53 [Suppl 3]:S6–S15
Klevecz RR, Bolen J, Forrest G, Murray DB (2004) A genomewide oscillation in transcription gates DNA replication and cell cycle. Proc Natl Acad Sci USA 101:1200–1205
Kocer A, Walko M, Meijberg W, Feringa BL (2005) A light-actuated nanovalve derived from a channel protein. Science 309:755–758
Lahav G, Rosenfeld N, Sigal A, Geva-Zatorsky N, Levine AJ, Elowitz MB, Alon U (2004) Dynamics of the p53-Mdm2 feedback loop in individual cells. Nat Genet 36:147–150
Langton CG (1997) Artificial life: an overview. MIT Press, Cambridge
Laurent M, Kellershohn N (1999) Multistability: a major means of differentiation and evolution in biological systems. Trends Biochem Sci 24:418–422
Le TT, Harlepp S, Guet CC, Dittmar K, Emonet T, Pan T, Cluzel P (2005) Real-time RNA profiling within a single bacterium. Proc Natl Acad Sci USA 102:9160–9164
Levsky JM, Singer RH (2003) Gene expression and the myth of the average cell. Trends Cell Biol 13:4–6
Levsky JM, Shenoy SM, Pezo RC, Singer RH (2002) Single-cell gene expression profiling. Science 297:836–840
Lewontin RC (2001) The triple helix: gene, organism, and environment. Harvard University Press, Cambridge
Lowrey PL, Takahashi JS (2004) Mammalian circadian biology: elucidating genome-wide levels of temporal organization. Annu Rev Genomics Hum Genet 5:407–441
Lu JZ, Rosenzweig Z (2000) Nanoscale fluorescent sensors for intracellular analysis. Fresenius J Anal Chem 366:569–575
Ma'ayan A, Jenkins SL, Neves S, Hasseldine A, Grace E, Dubin-Thaler B, Eungdamrong NJ, Weng G, Ram PT, Rice JJ, Kershenbaum A, Stolovitzky GA, Blitzer RD, Iyengar R (2005) Formation of regulatory patterns during signal propagation in a mammalian cellular network. Science 309:1078–1083
Mackey MC, Glass L (1977) Oscillation and chaos in physiological control systems. Science 197:287–288
Mandelbrot BB (1982) The fractal geometry of nature. WH Freeman, San Francisco
Mangan S, Alon U (2003) Structure and function of the feed-forward loop network motif. Proc Natl Acad Sci USA 100:11980–11985
Marcotte EM (2001) The path not taken. Nat Biotechnol 19:626–627
Marsh BJ, Mastronarde DN, Buttle KF, Howell KE, McIntosh JR (2001) Organellar relationships in the Golgi region of the pancreatic beta cell line, HIT-T15, visualized by high resolution electron tomography. Proc Natl Acad Sci USA 98:2399–2406
Medina M (2005) Genomes, phylogeny, and evolutionary systems biology. Proc Natl Acad Sci USA 102 [Suppl 1]:6630–6635
Meinhardt H (1996) Models of biological pattern formation: common mechanism in plant and animal development. Int J Dev Biol 40:123–134
Milo R, Shen-Orr S, Itzkovitz S, Kashtan N, Chklovskii D, Alon U (2002) Network motifs: simple building blocks of complex networks. Science 298:824–827
Morange M (2001) The misunderstood gene. Harvard University Press, Cambridge
Murray JD (1993) Mathematical biology. Springer-Verlag, Heidelberg, Berlin, New York
Nguyen TD, Tseng HR, Celestre PC, Flood AH, Liu Y, Stoddart JF, Zink JI (2005) A reversible molecular valve. Proc Natl Acad Sci USA 102:10029–10034
Nicolis G, Prigogine I (1989) Exploring complexity: an introduction. WH Freeman, New York
Ninfa AJ, Mayo AE (2004) Hysteresis vs. graded responses: the connections make all the difference. Science's STKE 2004:e20
Noble D (2002) Modeling the heart—from genes to cells to the whole organ. Science 295:1678–1682
Normile D (1999) Building working cells ‘in silico’. Science 284:80–81
Okubo A (1986) Dynamical aspects of animal grouping: swarms, schools, flocks, and herds. Adv Biophys 22:1–94
Ozbudak EM, Thattai M, Lim HN, Shraiman BI, van Oudenaarden A (2004) Multistability in the lactose utilization network of Escherichia coli. Nature 427:737–740
Palsson E, Cox EC (1996) Origin and evolution of circular waves and spirals in Dictyostelium discoideum territories. Proc Natl Acad Sci USA 93:1151–1155
Papin JA, Price ND, Wiback SJ, Fell DA, Palsson BO (2003) Metabolic pathways in the post-genome era. Trends Biochem Sci 28:250–258
Pattee HH (1973) Hierarchy theory: the challenge of complex systems. G Braziller, New York
Picht G (1969) Mut zur Utopie: die grossen Zukunftsaufgaben; zwölf Vorträge. R Piper, München
Pugh GE (1977) The biological origin of human values. Basic Books, New York
Reik W, Dean W (2002) Back to the beginning. Nature 420:127
Rocheleau JV, Walker GM, Head WS, McGuinness OP, Piston DW (2004) Microfluidic glucose stimulation reveals limited coordination of intracellular Ca2+ activity oscillations in pancreatic islets. Proc Natl Acad Sci USA 101:12899–12903
Rose SPR (2003) Lifelines: life beyond the gene. Oxford University Press, Oxford
Rubin H (1990) On the nature of enduring modifications induced in cells and organisms. Am J Physiol 258:L19–L24
Sachs K, Perez O, Pe'er D, Lauffenburger DA, Nolan GP (2005) Causal protein-signaling networks derived from multiparameter single-cell data. Science 308:523–529
Sarpeshkar R (1998) Analog versus digital: extrapolating from electronics to neurobiology. Neural Comput 10:1601–1638
Schmidt-Nielsen K (1984) Scaling: why is animal size so important. Cambridge University Press, New York
Simon SM, Llinas RR (1985) Compartmentalization of the submembrane calcium activity during calcium influx and its significance in transmitter release. Biophys J 48:485–498
Sohrmann M, Peter M (2003) Polarizing without a C(l)ue. Trends Cell Biol 13:526–533
Southan C (2004) Has the yo-yo stopped? An assessment of human protein-coding gene number. Proteomics 4:1712–1726
Springel V, White SDM, Jenkins A, Frenk CS, Yoshida N, Gao L, Navarro J, Thacker R, Croton D, Helly J, Peacock JA, Cole S, Thomas P, Couchman H, Evrard A, Colberg J, Pearce F (2005) Simulations of the formation, evolution and clustering of galaxies and quasars. Nature 435:629–636
Spudich JL, Koshland DE (1976) Non-genetic individuality: chance in the single cell. Nature 262:467–471
Stelling J, Sauer U, Szallasi Z, Doyle FJ, Doyle J (2004) Robustness of cellular functions. Cell 118:675–685
Stephanopoulos GN, Aristidou AA, Nielsen J (1998) Metabolic engineering: principles and methodologies. Academic Press, San Diego
Strogatz SH (2001) Exploring complex networks. Nature 410:268–276
Strohman RC (1997) The coming Kuhnian revolution in biology. Nat Biotechnol 15:194–200
Strohman RC (2000) Organization becomes cause in the matter. Nat Biotechnol 18:575–576
Stuart JM, Segal E, Koller D, Kim SK (2003) A gene-coexpression network for global discovery of conserved genetic modules. Science 302:249–255
Takahashi K, Arjunan SNV, Tomita M (2005) Space in systems biology of signaling pathways—towards intracellular molecular crowding in silico. FEBS Lett 579:1783–1788
Tinbergen N (1952) Derived activities: their causation, biological significance, origin, and emancipation during evolution. Q Rev Biol 27:1–32
Turing AM (1952) The chemical basis of morphogenesis. Philos Trans R Soc Lond B Biol Sci 237:37–72
Tyson JJ, Chen KC, Novak B (2003) Sniffers, buzzers, toggles and blinkers: dynamics of regulatory and signaling pathways in the cell. Curr Opin Cell Biol 15:221–231
von Bertalanffy L (1969) General system theory; foundations, development, applications. G Braziller, New York
Waddington CH (1956) Principles of embryology. Allen and Unwin, London
Waldrop MM (1992) Complexity: the emerging science at the edge of order and chaos. Simon and Schuster, New York
Webster G, Goodwin BC (1984) A structuralist approach to morphology. Riv Biol 77:503–531
Whitesides GM (2003) The ‘right’ size in nanobiotechnology. Nat Biotechnol 21:1161–1165
Whitfield ML, Sherlock G, Saldanha AJ, Murray JI, Ball CA, Alexander KE, Matese JC, Perou CM, Hurt MM, Brown PO, Botstein D (2002) Identification of genes periodically expressed in the human cell cycle and their expression in tumors. Mol Biol Cell 13:1977–2000
Wiener N (1965) Cybernetics: or control and communication in the animal and the machine. MIT Press, Cambridge
Wikswo JP, Prokop A, Baudenbacher F, Cliffel D, Csukas B, Velkovsky M (2006) The engineering challenges of BioNEMS: the integration of microfluidics, and micro- and nanodevices, models, and external control for systems biology. IEE Proceedings Nanobiotechnology (in press)
Wilders R, Jongsma HJ (1993) Beating irregularity of single pacemaker cells isolated from the rabbit sinoatrial node. Biophys J 65:2601–2613
Wilson EO (1995) Naturalist. Warner Books, New York
Wolfe MF, Goldberg R (2000) Rube Goldberg: inventions. Simon and Schuster, New York
Wolfram S (2002) A new kind of science. Wolfram Media, Champaign
Wolpert L (1994) Do we understand development? Science 266:571–572
Xiong W, Ferrell JE (2003) A positive-feedback-based bistable ‘memory module’ that governs a cell fate decision. Nature 426:460–465
Yamamoto T, Nakahata Y, Soma H, Akashi M, Mamine T, Takumi T (2004) Transcriptional oscillation of canonical clock genes in mouse peripheral tissues. BMC Mol Biol 5:18
Yi TM, Huang Y, Simon MI, Doyle J (2000) Robust perfect adaptation in bacterial chemotaxis through integral feedback control. Proc Natl Acad Sci USA 97:4649–4653
Acknowledgements
We are deeply indebted to the many colleagues and friends who, through their publications, conversations, and presentations, have helped educate us about many aspects of systems biology and have critiqued our views. We apologize to those whose work is not explicitly mentioned. A list of all original references would have been irresponsibly long. Our citations also do not meet the standard of a disciplined historian of science. Rather than consistently reflecting the originators of an idea, the citations were chosen to be most practical and instructive for readers who seek further reading on a subject. We are indebted to Allison Price and Don Berry for their unflagging editorial assistance with this manuscript.
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Huang, S., Wikswo, J. (2006). Dimensions of systems biology. In: Reviews of Physiology Biochemistry and Pharmacology. Reviews of Physiology Biochemistry and Pharmacology, vol 157. Springer, Berlin, Heidelberg. https://doi.org/10.1007/112_0602
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