Abstract
Microglia are innate immune cells that survey the central nervous system (CNS) and respond almost immediately to any disturbance in CNS homeostasis. They are derived from primitive yolk sac myeloid progenitors and in the mouse colonize the CNS during fetal development. As a population, microglia have the potential to expand rapidly in response to inflammatory stimuli, injury, or any other pathological changes, due to a high capacity for proliferation. In addition, apoptotic mechanisms can be evoked to retract the microglial population, as reactivity declines. In the normal CNS, a low rate of proliferation and apoptosis maintain a low rate of microglial turnover. Here, we describe quantitative analysis of proliferation and apoptosis of microglial cells isolated from individual adult mice by flow cytometry, which allows distinction from perivascular or infiltrating macrophages, based on differential expression of CD45. These methods can be applied to analyze microglial turnover in various models of neuroinflammation.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Wirenfeldt M, Babcock AA, Vinters HV (2011) Microglia—insights into immune system structure, function, and reactivity in the central nervous system. Histol Histopathol 26(4):519–530
Hanisch UK, Kettenmann H (2007) Microglia: active sensor and versatile effector cells in the normal and pathologic brain. Nat Neurosci 10(11):1387–1394. doi:10.1038/nn1997
Davalos D, Grutzendler J, Yang G, Kim JV, Zuo Y, Jung S, Littman DR, Dustin ML, Gan WB (2005) ATP mediates rapid microglial response to local brain injury in vivo. Nat Neurosci 8(6):752–758. doi:10.1038/nn1472
Nimmerjahn A, Kirchhoff F, Helmchen F (2005) Resting microglial cells are highly dynamic surveillants of brain parenchyma in vivo. Science 308(5726):1314–1318. doi:10.1126/science.1110647
Ladeby R, Wirenfeldt M, Garcia-Ovejero D, Fenger C, Dissing-Olesen L, Dalmau I, Finsen B (2005) Microglial cell population dynamics in the injured adult central nervous system. Brain Res Brain Res Rev 48(2):196–206
Graeber MB, Tetzlaff W, Streit WJ, Kreutzberg GW (1988) Microglial cells but not astrocytes undergo mitosis following rat facial nerve axotomy. Neurosci Lett 85(3):317–321
Streit WJ, Kreutzberg GW (1988) Response of endogenous glial cells to motor neuron degeneration induced by toxic ricin. J Comp Neurol 268(2):248–263. doi:10.1002/cne.902680209
Wirenfeldt M, Dissing-Olesen L, Babcock AA, Nielsen M, Meldgaard M, Zimmer J, Azcoitia I, Leslie RG, Dagnaes-Hansen F, Finsen B (2007) Population control of resident and immigrant microglia by mitosis and apoptosis. Am J Pathol 171(2):617–631
Ladeby R, Wirenfeldt M, Dalmau I, Gregersen R, Garcia-Ovejero D, Babcock A, Owens T, Finsen B (2005) Proliferating resident microglia express the stem cell antigen CD34 in response to acute neural injury. Glia 50(2):121–131
Babcock AA, Wirenfeldt M, Holm T, Nielsen HH, Dissing-Olesen L, Toft-Hansen H, Millward JM, Landmann R, Rivest S, Finsen B, Owens T (2006) Toll-like receptor 2 signaling in response to brain injury: an innate bridge to neuroinflammation. J Neurosci 26(49):12826–12837. doi:10.1523/JNEUROSCI.4937-05.2006
Dissing-Olesen L, Ladeby R, Nielsen HH, Toft-Hansen H, Dalmau I, Finsen B (2007) Axonal lesion-induced microglial proliferation and microglial cluster formation in the mouse. Neuroscience 149(1):112–122. doi:10.1016/j.neuroscience.2007.06.037
Hailer NP, Grampp A, Nitsch R (1999) Proliferation of microglia and astrocytes in the dentate gyrus following entorhinal cortex lesion: a quantitative bromodeoxyuridine-labelling study. Eur J Neurosci 11(9):3359–3364
Jones LL, Banati RB, Graeber MB, Bonfanti L, Raivich G, Kreutzberg GW (1997) Population control of microglia: does apoptosis play a role? J Neurocytol 26(11):755–770
Lawson LJ, Perry VH, Gordon S (1992) Turnover of resident microglia in the normal adult mouse brain. Neuroscience 48(2):405–415
Gratzner HG, Leif RC (1981) An immunofluorescence method for monitoring DNA synthesis by flow cytometry. Cytometry 1(6):385–393. doi:10.1002/cyto.990010606
Gratzner HG (1982) Monoclonal antibody to 5-bromo- and 5-iododeoxyuridine: a new reagent for detection of DNA replication. Science 218(4571):474–475
Martin SJ, Reutelingsperger CP, McGahon AJ, Rader JA, van Schie RC, LaFace DM, Green DR (1995) Early redistribution of plasma membrane phosphatidylserine is a general feature of apoptosis regardless of the initiating stimulus: inhibition by overexpression of Bcl-2 and Abl. J Exp Med 182(5):1545–1556
Koopman G, Reutelingsperger CP, Kuijten GA, Keehnen RM, Pals ST, van Oers MH (1994) Annexin V for flow cytometric detection of phosphatidylserine expression on B cells undergoing apoptosis. Blood 84(5):1415–1420
Remington LT, Babcock AA, Zehntner SP, Owens T (2007) Microglial recruitment, activation, and proliferation in response to primary demyelination. Am J Pathol 170(5):1713–1724
Lambertsen KL, Clausen BH, Babcock AA, Gregersen R, Fenger C, Nielsen HH, Haugaard LS, Wirenfeldt M, Nielsen M, Dagnaes-Hansen F, Bluethmann H, Faergeman NJ, Meldgaard M, Deierborg T, Finsen B (2009) Microglia protect neurons against ischemia by synthesis of tumor necrosis factor. J Neurosci 29(5):1319–1330. doi:10.1523/JNEUROSCI.5505-08.2009
Clausen BH, Lambertsen KL, Babcock AA, Holm TH, Dagnaes-Hansen F, Finsen B (2008) Interleukin-1beta and tumor necrosis factor-alpha are expressed by different subsets of microglia and macrophages after ischemic stroke in mice. J Neuroinflammation 5(1):46
Wirenfeldt M, Babcock AA, Ladeby R, Lambertsen KL, Dagnaes-Hansen F, Leslie RG, Owens T, Finsen B (2005) Reactive microgliosis engages distinct responses by microglial subpopulations after minor central nervous system injury. J Neurosci Res 82(4):507–514
Sedgwick JD, Schwender S, Imrich H, Dorries R, Butcher GW, ter Meulen V (1991) Isolation and direct characterization of resident microglial cells from the normal and inflamed central nervous system. Proc Natl Acad Sci USA 88(16):7438–7442
Toft-Hansen H, Babcock AA, Millward JM, Owens T (2007) Downregulation of membrane type-matrix metalloproteinases in the inflamed or injured central nervous system. J Neuroinflammation 4:24. doi:10.1186/1742-2094-4-24
Brambilla R, Persaud T, Hu X, Karmally S, Shestopalov VI, Dvoriantchikova G, Ivanov D, Nathanson L, Barnum SR, Bethea JR (2009) Transgenic inhibition of astroglial NF-kappa B improves functional outcome in experimental autoimmune encephalomyelitis by suppressing chronic central nervous system inflammation. J Immunol 182(5):2628–2640. doi:10.4049/jimmunol.0802954
Renno T, Krakowski M, Piccirillo C, Lin JY, Owens T (1995) TNF-alpha expression by resident microglia and infiltrating leukocytes in the central nervous system of mice with experimental allergic encephalomyelitis. Regulation by Th1 cytokines. J Immunol 154(2):944–953
Sedgwick JD, Ford AL, Foulcher E, Airriess R (1998) Central nervous system microglial cell activation and proliferation follows direct interaction with tissue-infiltrating T cell blasts. J Immunol 160(11):5320–5330
Cao L, Palmer CD, Malon JT, De Leo JA (2009) Critical role of microglial CD40 in the maintenance of mechanical hypersensitivity in a murine model of neuropathic pain. Eur J Immunol 39(12):3562–3569. doi:10.1002/eji.200939657
Tough DF, Sprent J (1996) Viruses and T cell turnover: evidence for bystander proliferation. Immunol Rev 150:129–142
Nielsen HH, Toft-Hansen H, Lambertsen KL, Owens T, Finsen B (2011) Stimulation of adult oligodendrogenesis by myelin-specific T cells. Am J Pathol 179(4):2028–2041. doi:10.1016/j.ajpath.2011.06.006
Babcock AA, Toft-Hansen H, Owens T (2008) Signaling through MyD88 regulates leukocyte recruitment after brain injury. J Immunol 181(9):6481–6490
Babcock AA, Kuziel WA, Rivest S, Owens T (2003) Chemokine expression by glial cells directs leukocytes to sites of axonal injury in the CNS. J Neurosci 23(21):7922–7930
Toft-Hansen H, Fuchtbauer L, Owens T (2011) Inhibition of reactive astrocytosis in established experimental autoimmune encephalomyelitis favors infiltration by myeloid cells over T cells and enhances severity of disease. Glia 59(1):166–176. doi:10.1002/glia.21088
Khorooshi R, Babcock AA, Owens T (2008) NF-kappaB-driven STAT2 and CCL2 expression in astrocytes in response to brain injury. J Immunol 181(10):7284–7291
Acknowledgements
This work was supported by The Augustinus Foundation; Aase og Ejnar Danielsens Fond; The Carlsberg Foundation, Grosserer M. Brogaard og Hustrus Mindefond, Odense; Katrine og Vigo Skovgaards Fond; Fonden til Lægevidenskabens Fremme; The Lundbeck Foundation; The Novo Nordisk Foundation; Overlægerådets Legatudvalg; the Danish Alzheimer’s Society; and the Danish Medical Research Council.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2013 Springer Science+Business Media New York
About this protocol
Cite this protocol
Babcock, A.A., Wirenfeldt, M., Finsen, B. (2013). Quantification of Microglial Proliferation and Apoptosis by Flow Cytometry. In: Joseph, B., Venero, J. (eds) Microglia. Methods in Molecular Biology, vol 1041. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-520-0_15
Download citation
DOI: https://doi.org/10.1007/978-1-62703-520-0_15
Published:
Publisher Name: Humana Press, Totowa, NJ
Print ISBN: 978-1-62703-519-4
Online ISBN: 978-1-62703-520-0
eBook Packages: Springer Protocols