Abstract
Botulinum neurotoxins (BoNTs) are the most potent human toxins known and the causative agent of botulism, and are widely used as valuable pharmaceuticals. The BoNTs are modular proteins consisting of a heavy chain and a light chain linked by a disulfide bond. Intoxication of neuronal cells by BoNTs is a multi-step process including specific cell binding, endocytosis, conformational change in the endosome, translocation of the enzymatic light chain into the cells cytosol, and SNARE target cleavage. The quantitative and reliable potency determination of fully functional BoNTs produced as active pharmaceutical ingredient (API) requires an assay that considers all steps in the intoxication pathway. The in vivo mouse bioassay has for years been the ‘gold standard’ assay used for this purpose, but it requires the use of large numbers of mice and thus causes associated costs and ethical concerns. Cell-based assays are currently the only in vitro alternative that detect fully functional BoNTs in a single assay and have been utilized for years for research purposes. Within the last 5 years, several cell-based BoNT detection assays have been developed that are able to quantitatively determine BoNT potency with similar or greater sensitivity than the mouse bioassay. These assays now offer an alternative method for BoNT potency determination. Such quantitative and reliable BoNT potency determination is a crucial step in basic research, in the development of pharmaceutical BoNTs, and in the quantitative detection of neutralizing antibodies.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsAbbreviations
- NCB assay:
-
Neuronal cell-based assay
- BoNT:
-
Botulinum neurotoxins
- HC:
-
Heavy chain
- LC:
-
Light chain
- SNAP-25:
-
Synaptosomal-associated protein 25
- VAMP:
-
Vesicle-associated membrane protein
- SNARE:
-
Soluble N-ethylmaleimide-sensitive factor attachment protein receptor
- FRET:
-
Fluorescence resonance energy transfer
- FDA:
-
Food and Drug Administration
- SV2:
-
Synaptic vesicle protein 2
- MBA:
-
Mouse bioassay
- NGF:
-
Nerve growth factor
- EB:
-
Embryoid body
- mES cells:
-
Mouse embryonic stem cells
- hiPS cells:
-
Human induced pluripotent stem cells
- ELISA:
-
Enzyme-linked immunosorbent assay
- EDB:
-
Extensor digitorum brevis
- LD50 :
-
Lethal dose at which 50 % of animals die
- U:
-
Mouse LD50 Unit
- EC50 :
-
Half maximal effective concentration
- GT1b:
-
Trisialoganglioside GT1b
References
Adler S, Bicker G, Bigalke H et al (2010) The current scientific and legal status of alternative methods to the LD50 test for botulinum neurotoxin potency testing. The report and recommendations of a ZEBET expert meeting. Altern Lab Anim 38:315–330
Akaike N, Ito Y, Shin MC, Nonaka K, Torii Y, Harakawa T, Ginnaga A, Kozaki S, Kaji R (2010) Effects of A2 type botulinum toxin on spontaneous miniature and evoked transmitter release from the rat spinal excitatory and inhibitory synapses. Toxicon 56:1315–1326
Arnon SS, Schechter R, Inglesby TV et al (2001) Botulinum toxin as a biological weapon: medical and public health management. JAMA 285:1059–1070
Benatar MG, Willison HJ, Vincent A (1997) Lack of effect of Miller Fisher sera/plasmas on transmitter release from PC12 cells. J Neuroimmunol 80:1–5
Bercsenyi K, Giribaldi F, Schiavo G (2012) The elusive compass of clostridial neurotoxins: deciding when and where to go? doi:10.1007/978-3-642-33570-9_5
Bigalke H, Dimpfel W, Habermann E (1978) Suppression of 3H-acetylcholine release from primary nerve cell cultures by tetanus and botulinum-A toxin. Naunyn Schmiedebergs Arch Pharmacol 303:133–138
Bigalke H, Dreyer F, Bergey G (1985) Botulinum A neurotoxin inhibits non-cholinergic synaptic transmission in mouse spinal cord neurons in culture. Brain Res 360:318–324
Binz T (2012) Clostridial neurotoxin light chains: devices for SNARE cleavage mediated blockade of neurotransmission. doi:10.1007/978-3-642-33570-9_7
Binz T, Blasi J, Yamasaki S et al (1994) Proteolysis of SNAP-25 by types E and A botulinal neurotoxins. J Biol Chem 269:1617–1620
Blasi J, Chapman ER, Link E et al (1993a) Botulinum neurotoxin A selectively cleaves the synaptic protein SNAP-25. Nature 365:160–163
Blasi J, Chapman ER, Yamasaki S et al (1993b) Botulinum neurotoxin C1 blocks neurotransmitter release by means of cleaving HPC-1/syntaxin. EMBO J 12:4821–4828
Borodic G (2007) Botulinum toxin, immunologic considerations with long-term repeated use, with emphasis on cosmetic applications. Facial Plast Surg Clin North Am 15:11–16
Borodic GE, Duane D, Pearce B et al (1995) Antibodies to botulinum toxin. Neurology 45:204
Brewer GJ (1995) Serum-free B27/neurobasal medium supports differentiated growth of neurons from the striatum, substantia nigra, septum, cerebral cortex, cerebellum, and dentate gyrus. J Neurosci Res 42:674–683
Brewer GJ, Torricelli JR, Evege EK et al (1993) Optimized survival of hippocampal neurons in B27-supplemented neurobasal, a new serum-free medium combination. J Neurosci Res 35:567–576
Cartee TV, Monheit GD (2011) An overview of botulinum toxins: past, present, and future. Clin Plast Surg 38:409–426
Conway JO, Sherwood LJ, Collazo MT et al (2010) Llama single domain antibodies specific for the 7 botulinum neurotoxin serotypes as heptaplex immunoreagents. PLoS ONE 5:e8818
Cordivari C, Misra VP, Vincent A et al (2006) Secondary nonresponsiveness to botulinum toxin A in cervical dystonia: the role of electromyogram-guided injections, botulinum toxin A antibody assay, and the extensor digitorum brevis test. Mov Disord 21:1737–1741
Dong M, Liu H, Tepp WH et al (2008) Glycosylated SV2A and SV2B mediate the entry of botulinum neurotoxin E into neurons. Mol Biol Cell 19:5226–5237
Dong M, Richards DA, Goodnough MC et al (2003) Synaptotagmins I and II mediate entry of botulinum neurotoxin B into cells. J Cell Biol 162:1293–1303
Dong M, Tepp WH, Johnson EA et al (2004) Using fluorescent sensors to detect botulinum neurotoxin activity in vitro and in living cells. Proc Natl Acad Sci U S A 101:14701–14706
Dong M, Tepp WH, Liu H et al (2007) Mechanism of botulinum neurotoxin B and G entry into hippocampal neurons. J Cell Biol 179:1511–1522
Dong M, Yeh F, Tepp WH et al (2006) SV2 is the protein receptor for botulinum neurotoxin A. Science 312:592–596
Dorner MB, Schulz KM, Kull S (2012) Complexity of botulinum neurotoxins: challenges for detection technology. doi:10.1007/978-3-642-33570-9_11
Dressler D (2004) Clinical presentation and management of antibody-induced failure of botulinum toxin therapy. Mov Disord 19(Suppl 8):S92–S100
Dressler D, Benecke R (2007) Pharmacology of therapeutic botulinum toxin preparations. Disabil Rehabil 29:1761–1768
Dressler D, Bigalke H (2002) Botulinum toxin antibody type A titres after cessation of botulinum toxin therapy. Mov Disord 17:170–173
Dressler D, Lange M, Bigalke H (2005) Mouse diaphragm assay for detection of antibodies against botulinum toxin type B. Mov Disord 20:1617–1619
Dressler D, Wohlfahrt K, Meyer-Rogge E et al (2010) Antibody-induced failure of botulinum toxin a therapy in cosmetic indications. Dermatol Surg 36(Suppl 4):2182–2187
Duggan MJ, Quinn CP, Chaddock JA et al (2002) Inhibition of release of neurotransmitters from rat dorsal root ganglia by a novel conjugate of a Clostridium botulinum toxin A endopeptidase fragment and Erythrina cristagalli lectin. J Biol Chem 277:34846–34852
Eleopra R, Tugnoli V, Quatrale R et al (2004) Different types of botulinum toxin in humans. Mov Disord 19(Suppl 8):S53–S59
Eleopra R, Tugnoli V, Rossetto O et al (1998) Different time courses of recovery after poisoning with botulinum neurotoxin serotypes A and E in humans. Neurosci Lett 256:135–138
Evidente VG, Adler CH (2010) An update on the neurologic applications of botulinum toxins. Curr Neurol Neurosci Rep 10:338–344
Fischer A (2012) Synchronized chaperone function of botulinum neurotoxin domains mediates light chain translocation into neurons. doi:10.1007/978-3-642-33570-9_6
Fischer A, Montal M (2007a) Crucial role of the disulfide bridge between botulinum neurotoxin light and heavy chains in protease translocation across membranes. J Biol Chem 282:29604–29611
Fischer A, Montal M (2007b) Single molecule detection of intermediates during botulinum neurotoxin translocation across membranes. Proc Natl Acad Sci U S A 104:10447–10452
Fischer A, Nakai Y, Eubanks LM et al (2009) Bimodal modulation of the botulinum neurotoxin protein-conducting channel. Proc Natl Acad Sci U S A 106:1330–1335
Flynn TC (2004) Myobloc. Dermatol Clin 22:207–211 vii
Gimenez DF, Gimenez JA (1995) The typing of botulinal neurotoxins. Int J Food Microbiol 27:1–9
Hatheway CL (1988) Botulism. In: Balows A, Hausler WH, Ohashi M, Turano MA (eds) Laboratory diagnosis of infectious diseases: principles and practice, vol 1. Springer, New York, pp 111–133
Hill KK, Smith TJ (2012) Genetic diversity within Clostridium botulinum serotypes, botulinum neurotoxin gene clusters and toxin subtypes. doi:10.1007/978-3-642-33570-9_1
Hu BY, Zhang SC (2010) Directed differentiation of neural-stem cells and subtype-specific neurons from hESCs. Methods Mol Biol 636:123–137
Johnson EA, Montecucco C (2008) Chapter 11 Botulism. In: Engel Andrew G (ed) Handbook of clinical neurology, vol 91. Elsevier, pp 333–368
Jones RG, Alsop TA, Hull R et al (2006) Botulinum type A toxin neutralisation by specific IgG and its fragments: a comparison of mouse systemic toxicity and local flaccid paralysis assays. Toxicon 48:246–254
Jones RG, Liu Y, Halls C et al (2011) Release of proteolytic activity following reduction in therapeutic human serum albumin containing products: detection with a new neoepitope endopeptidase immunoassay. J Pharm Biomed Anal 54:74–80
Kalb SR, Baudys J, Egan C et al (2011) Different substrate recognition requirements for cleavage of synaptobrevin-2 by Clostridium baratii and Clostridium botulinum type F neurotoxins. Appl Environ Microbiol 77:1301–1308
Keller JE, Cai F, Neale EA (2004) Uptake of botulinum neurotoxin into cultured neurons. Biochemistry 43:526–532
Keller JE, Neale EA (2001) The role of the synaptic protein snap-25 in the potency of botulinum neurotoxin type A. J Biol Chem 276:13476–13482
Keller JE, Neale EA, Oyler G et al (1999) Persistence of botulinum neurotoxin action in cultured spinal cord cells. FEBS Lett 456:137–142
Kessler KR, Benecke R (1997) The EBD test–a clinical test for the detection of antibodies to botulinum toxin type A. Mov Disord 12:95–99
Kiris E, Nuss JE, Burnett JC et al (2011) Embryonic stem cell-derived motoneurons provide a highly sensitive cell culture model for botulinum neurotoxin studies, with implications for high-throughput drug discovery. Stem Cell Res 6:195–205
Kivell BM, McDonald FJ, Miller JH (2001) Method for serum-free culture of late fetal and early postnatal rat brainstem neurons. Brain Res Brain Res Protoc 6:91–99
Kohno K, Kawakami T, Hiruma H (2005) Effects of soluble laminin on organelle transport and neurite growth in cultured mouse dorsal root ganglion neurons: difference between primary neurites and branches. J Cell Physiol 205:253–261
Lacy DB, Tepp W, Cohen AC et al (1998) Crystal structure of botulinum neurotoxin type A and implications for toxicity. Nat Struct Biol 5:898–902
Lee JO, Rosenfield J, Tzipori S et al (2008) M17 human neuroblastoma cell as a cell model for investigation of botulinum neurotoxin A activity and evaluation of BoNT/A specific antibody. The Botulinum J 1:135–152
Liu YY, Rigsby P, Sesardic D et al (2012) A functional dual-coated (FDC) microtitre plate method to replace the botulinum toxin LD (50) test. Anal Biochem 425:28–35
Macdonald TE, Helma CH, Shou Y et al (2011) Analysis of Clostridium botulinum serotype E strains by using multilocus sequence typing, amplified fragment length polymorphism, variable-number tandem-repeat analysis, and botulinum neurotoxin gene sequencing. Appl Environ Microbiol 77:8625–8634
McInnes C, Dolly JO (1990) Ca2(+)-dependent noradrenaline release from permeabilised PC12 cells is blocked by botulinum neurotoxin A or its light chain. FEBS Lett 261:323–326
McMahon HT, Nicholls DG (1991) Transmitter glutamate release from isolated nerve terminals: evidence for biphasic release and triggering by localized Ca2+. J Neurochem 56:86–94
McNutt P, Celver J, Hamilton T et al (2011) Embryonic stem cell-derived neurons are a novel, highly sensitive tissue culture platform for botulinum research. Biochem Biophys Res Commun 405:85–90
Montal M (2010) Botulinum neurotoxin: a marvel of protein design. Annu Rev Biochem 79:591–617
Montecucco C (1986) How do tetanus and botulinum toxins bind to neuronal membranes? Trends Biochem Sci 11:314–317
Muller K, Mix E, Adib Saberi F et al (2009) Prevalence of neutralising antibodies in patients treated with botulinum toxin type A for spasticity. J Neural Transm 116:579–585
Nishiki T, Kamata Y, Nemoto Y et al (1994) Identification of protein receptor for Clostridium botulinum type B neurotoxin in rat brain synaptosomes. J Biol Chem 269:10498–10503
Nuss JE, Ruthel G, Tressler LE et al (2010) Development of cell-based assays to measure botulinum neurotoxin serotype A activity using cleavage-sensitive antibodies. J Biomol Screen 15:42–51
Parnas D, Linial M (1995) Cholinergic properties of neurons differentiated from an embryonal carcinoma cell-line (P19). Int J Dev Neurosci 13:767–781
Peck MW (2009) Biology and genomic analysis of Clostridium botulinum. Adv Microb Physiol 55(183–265):320
Pellett S, Du ZW, Pier CL et al (2011) Sensitive and quantitative detection of botulinum neurotoxin in neurons derived from mouse embryonic stem cells. Biochem Biophys Res Commun 404:388–392
Pellett S, Tepp WH, Clancy CM et al (2007) A neuronal cell-based botulinum neurotoxin assay for highly sensitive and specific detection of neutralizing serum antibodies. FEBS Lett 581:4803–4808
Pellett S, Tepp WH, Toth SI et al (2010) Comparison of the primary rat spinal cord cell (RSC) assay and the mouse bioassay for botulinum neurotoxin type A potency determination. J Pharmacol Toxicol Methods 61:304–310
Peng L, Berntsson RP, Tepp WH et al. (2012) Botulinum neurotoxin D-C uses synaptotagmin I/II as receptors and human synaptotagmin II is not an effective receptor for type B, D-C, and G toxins. J Cell Sci. March 2012 epub ahead of print
Peng L, Tepp WH, Johnson EA et al (2011) Botulinum neurotoxin D uses synaptic vesicle protein SV2 and gangliosides as receptors. PLoS Pathog 7:e1002008
Pickett A, Perrow K (2011) Towards new uses of botulinum toxin as a novel therapeutic tool. Toxins (Basel) 3:63–81
Pier CL, Chen C, Tepp WH et al (2011) Botulinum neurotoxin subtype A2 enters neuronal cells faster than subtype A1. FEBS Lett 585:199–206
Purkiss JR, Friis LM, Doward S et al (2001) Clostridium botulinum neurotoxins act with a wide range of potencies on SH-SY5Y human neuroblastoma cells. Neurotoxicology 22:447–453
Raphael BH, Choudoir MJ, Luquez C et al (2010) Sequence diversity of genes encoding botulinum neurotoxin type F. Appl Environ Microbiol 76:4805–4812
Rasetti-Escargueil C, Jones RG, Liu Y, Sesardic D (2009) Measurement of botulinum types A, B and E neurotoxicity using the phrenic nerve-hemidiaphragm: improved precision with in-bred mice. Toxicon 53:503–511
Rasetti-Escargueil C, Machado CB, Preneta-Blanc R et al (2011a) Enhanced sensitivity to botulinum type A neurotoxin of human neuroblastoma SH-SY5Y cells after differentiation into mature neuronal cells. The Botulinum J 2:30–48
Rasetti-Escargueil C, Liu Y, Rigsby P et al (2011b) Phrenic nerve-hemidiaphragm as a highly sensitive replacement assay for determination of functional botulinum toxin antibodies. Toxicon 57:1008–1016
Ravni A, Bourgault S, Lebon A et al (2006) The neurotrophic effects of PACAP in PC12 cells: control by multiple transduction pathways. J Neurochem 98:321–329
Ray P (1993) Botulinum toxin A inhibits acetylcholine release from cultured neurons in vitro. In Vitro Cell Dev Biol Anim 29A:456–460
Rummel A (2012) Double receptor anchorage of botulinum neurotoxins accounts for their exquisite neurospecificity. doi:10.1007/978-3-642-33570-9_4
Rummel A, Hafner K, Mahrhold S et al (2009) Botulinum neurotoxins C, E and F bind gangliosides via a conserved binding site prior to stimulation-dependent uptake with botulinum neurotoxin F utilising the three isoforms of SV2 as second receptor. J Neurochem 110:1942–1954
Rummel A, Karnath T, Henke T et al (2004) Synaptotagmins I and II act as nerve cell receptors for botulinum neurotoxin G. J Biol Chem 279:30865–30870
Rummel A, Mahrhold S, Bigalke H et al (2011) Exchange of the H (CC) domain mediating double receptor recognition improves the pharmacodynamic properties of botulinum neurotoxin. FEBS J 278:4506–4515
Saadi RA, He K, Hartnett KA et al (2012) SNARE-dependent upregulation of potassium chloride co-transporter 2 activity after metabotropic zinc receptor activation in rat cortical neurons in vitro. Neuroscience 210:38–46
Schantz EJ, Kautter DA (1978) Standardized assay for Clostridium botulinum toxins. J Assoc Official Anal Chem 61:96–99
Schantz EJ, Johnson EA (1992) Properties and use of botulinum toxin and other microbial neurotoxins in medicine. Microbiol Rev 56:80–99
Schiavo G, Benfenati F, Poulain B et al (1992) Tetanus and botulinum-B neurotoxins block neurotransmitter release by proteolytic cleavage of synaptobrevin. Nature 359:832–835
Schiavo G, Malizio C, Trimble WS et al (1994) Botulinum G neurotoxin cleaves VAMP/synaptobrevin at a single Ala–Ala peptide bond. J Biol Chem 269:20213–20216
Schiavo G, Matteoli M, Montecucco C (2000) Neurotoxins affecting neuroexocytosis. Physiol Rev 80:717–766
Schiavo G, Shone CC, Bennett MK et al (1995) Botulinum neurotoxin type C cleaves a single Lys-Ala bond within the carboxyl-terminal region of syntaxins. J Biol Chem 270:10566–10570
Schiavo G, Shone CC, Rossetto O et al (1993) Botulinum neurotoxin serotype F is a zinc endopeptidase specific for VAMP/synaptobrevin. J Biol Chem 268:11516–11519
Sesardic D, Jones RG, Leung T et al (2004) Detection of antibodies against botulinum toxins. Mov Disord 19(Suppl 8):S85–S91
Sesardic D, Das RG (2007) Alternatives to the LD50 assay for botulinum toxin potency testing: strategies and progress towards refinement, reduction and replacement. Special Issue 14:581–585
Sesardic D, Leung T, Gaines Das R (2003) Role for standards in assays of botulinum toxins: international collaborative study of three preparations of botulinum type A toxin. Biologicals 31:265–276
Sheridan RE, Smith TJ, Adler M (2005) Primary cell culture for evaluation of botulinum neurotoxin antagonists. Toxicon 45:377–382
Shone CC, Melling J (1992) Inhibition of calcium-dependent release of noradrenaline from PC12 cells by botulinum type-A neurotoxin. Long-term effects of the neurotoxin on intact cells. Eur J Biochem 207:1009–1016
Smith TJ, Lou J, Geren IN et al (2005) Sequence variation within botulinum neurotoxin serotypes impacts antibody binding and neutralization. Infect Immun 73:5450–5457
Solomon HM, Lilly T (2001) Clostridium botulinum. In: BAM bacteriological analytical manual U.S. Food and Drug Administration, Chapter 17, 8th edn. Revision A
Stahl AM, Ruthel G, Torres-Melendez E et al (2007) Primary cultures of embryonic chicken neurons for sensitive cell-based assay of botulinum neurotoxin: implications for therapeutic discovery. J Biomol Screen 12:370–377
Strotmeier J, Willjes G, Binz T et al (2012) Human synaptotagmin-II is not a high affinity receptor for botulinum neurotoxin B and G: increased therapeutic dosage and immunogenicity. FEBS Lett 586:310–313
Swaminathan S (2011) Molecular structures and functional relationships in clostridial neurotoxins. FEBS J 278:4467–4485
Takahashi K, Tanabe K, Ohnuki M et al (2007) Induction of pluripotent stem cells from adult human fibroblasts by defined factors. Cell 131:861–872
Tegenge MA, Bohnel H, Gessler F et al (2012) Neurotransmitter vesicle release from human model neurons (NT2) is sensitive to botulinum toxin A. Cell Mol Neurobiol 32:1021–1029
Truong DD, Stenner A, Reichel G (2009) Current clinical applications of botulinum toxin. Curr Pharm Des 15:3671–3680
Tsukamoto K, Arimitsu H, Ochi S et al. (2012) P19 embryonal carcinoma cells exhibit high sensitivity to botulinum type C and D/C mosaic neurotoxins. Microbiol Immunol July 2012 epub ahead of print
Uemura M, Refaat MM, Shinoyama M et al (2010) Matrigel supports survival and neuronal differentiation of grafted embryonic stem cell-derived neural precursor cells. J Neurosci Res 88:542–551
Ullrich B, Li C, Zhang JZ, McMahon H et al (1994) Functional properties of multiple synaptotagmins in brain. Neuron 13:1281–1291
Verderio C, Grumelli C, Raiteri L et al (2007) Traffic of botulinum toxins A and E in excitatory and inhibitory neurons. Traffic 8:142–153
Welch MJ, Purkiss JR, Foster KA (2000) Sensitivity of embryonic rat dorsal root ganglia neurons to Clostridium botulinum neurotoxins. Toxicon 38:245–258
Whitemarsh RC, Strathman MJ, Chase LG et al (2012) Novel application of human neurons derived from induced pluripotent stem cells for highly sensitive botulinum neurotoxin detection. Toxicol Sci 126:426–435
Wichterle H, Peljto M (2008) Differentiation of mouse embryonic stem cells to spinal motor neurons. Curr Protoc Stem Cell Biol Chapter 1: Unit 1H.1.1–1H.1.9
Wilder-Kofie TD, Luquez C, Adler M et al (2011) An alternative in vivo method to refine the mouse bioassay for botulinum toxin detection. Comp Med 61:235–242
Williamson LC, Halpern JL, Montecucco C et al (1996) Clostridial neurotoxins and substrate proteolysis in intact neurons: botulinum neurotoxin C acts on synaptosomal-associated protein of 25 kDa. J Biol Chem 271:7694–7699
Xie C, Markesbery WR, Lovell MA (2000) Survival of hippocampal and cortical neurons in a mixture of MEM+ and B27-supplemented neurobasal medium. Free Radic Biol Med 28:665–672
Yaguchi T, Nishizaki T (2010) Extracellular high K+ stimulates vesicular glutamate release from astrocytes by activating voltage-dependent calcium channels. J Cell Physiol 225:512–518
Yamasaki S, Baumeister A, Binz T et al (1994) Cleavage of members of the synaptobrevin/VAMP family by types D and F botulinal neurotoxins and tetanus toxin. J Biol Chem 269:12764–12772
Yowler BC, Kensinger RD, Schengrund CL (2002) Botulinum neurotoxin A activity is dependent upon the presence of specific gangliosides in neuroblastoma cells expressing synaptotagmin I. J Biol Chem 277:32815–32819
Yu J, Vodyanik MA, Smuga-Otto K et al (2007) Induced pluripotent stem cell lines derived from human somatic cells. Science 318:1917–1920
Zhang SC (2006) Neural subtype specification from embryonic stem cells. Brain Pathol 16:132–142
Zhu H, Wang J, Jacky BPS et al (2010) Cells useful for immuno-based botulinum toxin serotype A activity assays. US-Patent 12/722801 (Allergan Inc) CA, USA
Acknowledgments
I thank Dr. Eric A Johnson and Regina Whitemarsh for critical review of the manuscript. This work was supported by the National Institutes of Health (contract numbers 1R01AI095274-01A1 and 1R21AI082826-01A2).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2012 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Pellett, S. (2012). Progress in Cell Based Assays for Botulinum Neurotoxin Detection. In: Rummel, A., Binz, T. (eds) Botulinum Neurotoxins. Current Topics in Microbiology and Immunology, vol 364. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33570-9_12
Download citation
DOI: https://doi.org/10.1007/978-3-642-33570-9_12
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-33569-3
Online ISBN: 978-3-642-33570-9
eBook Packages: Biomedical and Life SciencesBiomedical and Life Sciences (R0)