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Neurofilaments

Please Note: Due to time constraints, the text part of this page has not been updated for some time. However, references are added reasonably frequently.


structure/appearance ; expression ; phosphorylation ; accumulations ; other research
glial filaments ; peripherin ; internexin ; references

General

Neurofilaments (NFs) are the (Type IV) intermediate filaments found in neurons.

N.B. See Steinert (1996) and Julien and Mushynski (1998) for reviews on 'Intermediate Filaments in Health and Disease'.
Most abundant structures in most neurons.
Work has suggested a critical role for neurofilaments in the development and maintenance of axonal calibre, crucial for the conduction velocity of axons (e.g. Cleveland et al., 1991; Yamasaki et al., 1992 and Eyer and Peterson, 1994).

Structure and Appearance
They are formed from a triplet of three different-sized protein subunits termed NF-L , NF-M and NF-H (abbreviations for light [68kD], medium [160kD] and heavy [200kD]).
NF-M and NF-H have extended C-terminal domains and are thus unusually large for intermediate filaments.
Occur as lengthier filaments in axons compared with dendrites [in cultured hippocampal neurons: Benson et al., 1996).
The C-terminal domains are glutamic acid-enriched and can be phosphorylated on many residues (see refs below). They protrude sideways to connect with other filaments, microtubules or vesicles.
The C-terminal region of NF-H contains a unique functional domain consisting of 43 repeat Lys-Ser-Pro (KSP) motifs with either 3 or 5 amino acid spacers between them (see NF-H sequence data ).

Expression
NF-L and NF-Mfirst expressed shortly after initiation of axonal outgrowth with expression of NF-Hoccurring a few days later (in cultured hippocampal neurons: Benson et al., 1996 ).
In cultured rat brain neurons NF proteins were found to disappear and then NF-L and NF-M reappeared first, followed by dephosphorylated, and then phosphorylated, NF-H. The appearance of phosphorylated NF-H coincided with synapse formation (at around 4 days; Tokuoka et al., 2000 ). The NF-H phosphorylation was shown to be stimulated by brain-derived neurotrophic factor (BDNF) and neurotrophin 3 (NT3).


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Phosphorylation
The C-terminal domains are glutamic acid-enriched and can be phosphorylated on many residues (see refs below) by a large number of protein kinases .
Phosphorylation of NFs probably has a role in the establishment of neurofilament density and axonal calibre. There is also growing evidence (based on transgenic mouse studies ) that neurofilaments can affect the dynamics and perhaps the function of other cytoskeletal elements, such as microtubules and actin filaments . Perturbations in phosphorylation or in metabolism of neurofilaments are frequently observed in neurodegenerative diseases.
Most of the neurofilament phosphorylation sites, located in tail regions of NF-M and NF-H, consist of the repeat sequence motif, Lys-Ser-Pro (KSP).
The highly-phosphorylated Lys-Ser-Pro (KSP) region of NF-H is variable between species, while other regions are highly homologous ( Breen et al., 1989). Figlewicz et al. (1993) have identified an allelic variant of human NF-H containing an additional KSP motif.
Lee et al. (1988a and 1988b) have shown that there is a conserved major NF phosphorylation site within mammalian (and invertebrate) species. An antigenic determinant of this region was shown to exist in neurofibrillary tangles and in the MAP proteins MAP2 and tau .
It has been proposed that accumulations of variably-phosphorylated NFs represent the earliest cytoskeletal alteration associated with dystrophic neurite formation in AD (Dickson et al., 1999). These authors suggested that dystrophic neurites might 'mature' through NF-abundant forms through to the neurites containing the profoundly altered tau -immunoreactive filaments and that this was caused by amyloid plaques exerting a physically-damaging effect upon neighbouring axons.
NF-H is usually hypophosphorylated in the neuronal perikaryon but extensively hyperphosphorylated in axons.
Aberrant hyperphosphorylation of perikaryal NF-H is a common feature of many neurological diseases. Giasson et al. (1997) have shown that activation of stress-activated protein kinases (SAPKs ) by an upstream activator (MEKK-1) caused extensive NFH phosphorylation. SAPK was localised in the neurites as well as the cell body and they suggested that it could be involved in the phosphorylation of NFH in neurites (neuritic NFH is highly-phosphorylated despite a demonstrated absence of cyclin-dependent kinase 5 activity in these neurons).
Increased levels of phosphorylated NF-H in AD brain: Hashimoto et al. (1999) have shown that the relative amount of phosphorylated NF-H was increased in AD brains compared with controls (there were no apparent changes in NF-L and NF-M).
Anti-neurofilament serum antibodies: The work of Oron et al. (1997) on a rat animal model system  suggests a role for serum antibodies (against phosphorylated epitopes highly enriched in the heavy neurofilament protein NF-H)  in the neurodegeneration of cholinergic neurons in AD.
Jung et al. (2000) demonstrated that phosphorylation of the C-terminus of NF-H correlated with decreased neurofilament axonal transport velocity and that this phosphorylation therefore mediated the regulation of axonal transport.
Brownlees et al. (2000) showed that stress activated protein kinase 1b (SAPK1b) phosphorylates (multiple phosphorylation sites on) NF-H. They also showed that glutamate treatment induced activation of the SAPK1b and increased NF-H phosphorylation in the (primary cortical neuronal) cell bodies.
Ahlijanian et al. (2000) used transgenic mice (overexpressing human p25, which activates cdK5 ) to show hyperphosphorylation of tau and neurofilaments by cdk5. This latter was accompanied by cytoskeletal disruption.
Nakamura et al. (2000) demonstrated that bovine NF-L was phosphorylated by PKA at Ser41, Ser55, and Ser62 in the head region. They also showed that Ser55 phosphorylation could be modulated by okadaic acid-sensitive phosphatases .
Tokuoka et al. (2000)  showed that NF-H phosphorylation (in cultured rat brain neurons) was stimulated by brain-derived neurotrophic factor (BDNF) and neurotrophin 3 (NT3) and correlated with synapse formation. The BDNF-stimulated phosphorylation (and thus synapse formation) was mediated, at least in part, through activation of cdk5 .
Cdk5 and ERK1/2 are associated with complexes of NF proteins (and tubulins and tau ; Veeranna et al., 2000).

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NF Accumulations
Strong et al. (1994) used rabbits to test the effects of aluminium neurotoxicity and found that NF-L and NF-M messenger RNA levels were reduced in direct proportion to the extent of NF inclusion formation.
Tu et al. (1997) found that transgenic mice expressing a fusion protein (composed of  NF-H fused to beta-galactosidase) developed inclusions in neurons throughout the CNS. These contained massive filamentous aggregates of the endogenous NF proteins and the fusion protein which resembled the NF-rich Lewy bodies of Parkinson's disease and Lewy Body dementia. In hippocampal neurons they found that the inclusions which entrapped organelles (type II) led to neuronal cell death.
Trojanowski et al. (1998a) have reviewed abnormal protein aggregations in Parkinson's disease and Lewy body dementia. They state that Lewy bodies occur predominantly in the neocortical neurons in a subtype of AD known as the LB variant of AD (LBVAD) and that "aggregated neurofilament subunits and alpha-synuclein are major protein components of LBs, and these inclusions may contribute mechanistically to the degeneration of neurons in PD, DLB and LBVAD."
Abnormal NF accumulations are a prominent feature of brain trauma.These accumulations are predominantly dephosphorylated (in swine: Chen et al., 1999).
It has been proposed that accumulations of variably-phosphorylated NFs represent the earliest cytoskeletal alteration associated with dystrophic neurite formation in AD (Dickson et al., 1999). These authors suggested that dystrophic neurites might 'mature' through NF-abundant forms through to the neurites containing the profoundly altered tau -immunoreactive filaments and that this was caused by amyloid plaques exerting a physically-damaging effect upon neighbouring axons.

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Other Research on NF in AD
Norlund et al. (1999) showed that there were  increased levels of transglutaminase-induced epsilon-(gamma-glutamyl)lysine bonds (in AD brain) in the NF-M and NF-H proteins (and in tau , which contributes towards  the stabilisation of NFT s and their resistance to degradation and proteolytic digestion).
Increased titres of anti-NF antibodies have been reported in neurodegenerative disorders and it has been suggested that they might be pathogenic.
Terry Lorenzo et al. (2000) showed that NF-L (purified from bovine brain cortex plasma membranes) was a major protein phosphatase 1 (PP1)-binding target which also inhibited PP1, but not PP2A, activity. They suggested that NF-L might target  PP1 in membranes and the cytoskeleton of mammalian neurons.
Ray et al. (2000) have used PC12 cells to show that the upregulation of calpain (a Ca2+-dependent cysteine protease) by oxidative stress and calcium influx, resulted in NF-L degradation (and apoptosis).
Sjögren et al. (2000) investigated the CSF levels of (tau and) NF-L in patients with frontotemporal dementia (FTD) and other common dementia disorders (including early- and late-onset AD).Their results suggested an involvement of NF-L primarily in FTD and tau in early-onset AD. They suggested that their observed increases in CSF NF-L found in late-onset AD might reflect white-matter degeneration.

Glial filaments
These are the specific intermediate filaments of the glial cells (latter are found in mammalian brain and appear to support neuronal cells). The glial filaments are composed of glial fibrillary acidic protein (GFAP).
Terryberry et al. (1998) found that some (33%) of their AD patients studied had glial fibrillary acidic protein autoantibodies (in sera and cerebrospinal fluid).

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Peripherin 
Is a type III intermediate filament found in peripheral and certain CNS neurons (contains a phosphotyrosine residue: Angelastro et al., 1998).
Found to co-immunoprecipitate with (alpha) internexin (in cultured rat neurons): Athlan et al., 1997.

Internexin 
Is present in all neurons at every developmental stage (as long filaments in axons and short fragments in dendrites of cultured hippocampal neurons: Benson et al., 1996 ).
May serve as a link between cytoskeletal elements in dendritic shafts and spines (Benson et al., 1996).
Co-immunoprecipitates with (alpha) internexin (in cultured rat neurons): Athlan et al., 1997).

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Some Related References
(for those referring more specifically to tau, see the neurofibrillary tangle page)

N.B. Free Medical Journals online now at : http://www.freemedicaljournals.com/
(These journals include: Neurology, Neurobiology of Disease, Journal of Neurochemistry, Alzheimer's Disease Review)

Ackerley, S, Thornhill, P, Grierson, AJ, Brownlees, J, Anderton, BH, Leigh, PN, Shaw, CE, Miller, CCJ (2003) Neurofilament heavy chain side arm phosphorylation regulates axonal transport of neurofilaments. JOURNAL OF CELL BIOLOGY 161: 489-495

Ahlijanian MK; Barrezueta NX; Williams RD; Jakowski A; Kowsz KP; McCarthy S; Coskran T; Carlo A; Seymour PA; Burkhardt JE;Nelson RB; McNeish JD (2000). Hyperphosphorylated tau and neurofilament and cytoskeletal disruptions in mice overexpressing human p25, an activator of cdk5. Proc Natl Acad Sci USA 97: 2910-2915

Aletta_Jm, Shelanski_Ml, Greene_La. (1989) Phosphorylation Of The Peripherin 58-Kda Neuronal Intermediate Filament Protein - Regulation By Nerve Growth-Factor And Other Agents. JOURNAL OF BIOLOGICAL CHEMISTRY, 1989, Vol.264, No.8, pp.4619- 4627

Angelastro_JM, Ho_CL, Frappier_T, Liem_RKH, Greene_LA. (1998) Peripherin is tyrosine-phosphorylated at its carboxyl-terminal tyrosine. JOURNAL OF NEUROCHEMISTRY, 1998, Vol.70, No.2, pp.540-549

Arendt_T, Holzer_M, Fruth_R, Bruckner_MK, Gartner_U. (1998) Phosphorylation of tau, A beta-formation, and apoptosis after in vivo inhibition of PP-1 and PP-2A. NEUROBIOLOGY OF AGING, 1998, Vol.19, No.1, pp.3-13

Athlan_ES, Sacher_MG, Mushynski_WE. (1997) Associations between intermediate filament proteins expressed in cultured dorsal root ganglion neurons. JOURNAL OF NEUROSCIENCE RESEARCH, 1997, Vol.47, No.3, pp.300-310

Bajo, M, Yoo, BC, Cairns, N, Gratzer, M, Lubec, G (2001) Neurofilament proteins NF-L, NF-M and NF-H in brain of patients with Down syndrome and Alzheimer's disease. AMINO ACIDS 21: 293-301

Bennett GS, Quintana R. (1997) Identification of Ser-Pro and Thr-Pro phosphorylation sites in chicken  neurofilament-M tail domain. J Neurochem, 1997 Feb, 68:2, 534-43

Benson_DL, Mandell_JW, Shaw_G, Banker_G. (1996) Compartmentation of alpha-internexin and neurofilament triplet  proteins in cultured hippocampal neurons. JOURNAL OF NEUROCYTOLOGY, 1996, Vol.25, No.3, pp.181-196

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Bigio, EH, Lipton, AM, White, CL, Dickson, DW, Hirano, A (2003) Frontotemporal and motor neurone degeneration with neurofilament inclusion bodies: additional evidence for overlap between FTD and ALS. NEUROPATHOLOGY AND APPLIED NEUROBIOLOGY 29: 239-253  

Bjorkdahl, C, Sjogren, MJ, Winblad, B, Pei, JJ (2005) Zinc induces neurofilament phosphorylation independent of p70 S6 kinase in N2a cells. NEUROREPORT 16: 591-595

Breen KC, Robinson PA, Wion D, Anderton BH. (1989) Partial sequence of the rat heavy neurofilament polypeptide (NF-H). Identification of putative phosphorylation sites. Published erratum appears in FEBS Lett 1989 Feb 27;244(2):509

Brownlees, J, Ackerley, S, Grierson, AJ, Jacobsen, NJO, Shea, K, Anderton, BH, Leigh, PN, Shaw, CE, Miller, CCJ (2002)  Charcot-Marie-Tooth disease neurofilament mutations disrupt neurofilament assembly and axonal transport . HUMAN MOLECULAR GENETICS 11: 2837-2844

Brownlees J, Yates A, Bajaj NP, Davis D, Anderton BH, Leigh PN, Shaw CE, Miller CC (2000) Phosphorylation of neurofilament heavy chain side-arms by stress activated protein kinase-1b/Jun N-terminal kinase-3. J Cell Sci 113: 401-7

Bussiere, T, Giannakopoulos, P, Bouras, C, Perl, DP, Morrison, JH, Hof, PR (2003) Progressive degeneration of nonphosphorylated neurofilament protein-enriched pyramidal neurons predicts cognitive impairment in Alzheimer's disease: Stereologic analysis of prefrontal cortex area 9. JOURNAL OF COMPARATIVE NEUROLOGY 463: 281-302  

Cairns, NJ, Armstrong, RA (2003) Clustering of neuronal inclusions in "dementia with neurofilament inclusions" ACTA NEUROPATHOLOGICA 106: 125-128  

Cairns NJ, Grossman M, Arnold SE, Burn DJ, Jaros E, Perry RH,  Duyckaerts C, Stankoff B, Pillon B, Skullerud K, Cruz-Sanchez FF, Bigio EH, Mackenzie IRA, Gearing M, Juncos JL, Glass JD, Yokoo H, Nakazato Y, Mosaheb S, Thorpe JR, Uryu K, Lee V.M.-Y, Trojanowski, JQ 1.       (2004) Clinical and neuropathologic variation in neuronal intermediate filament inclusion disease (NIFID). Neurology 63: 1376-1384

CAIRNS NJ, JAROS E, PERRY R, BIGIO E, THORPE JR, MOSAHEB S, ZHANG B, LEE V M-Y, TROJANOWSKI JQ (2003) Phosphorylated neurofilaments form abnormal aggregates in Dementia with Neurofilament Inclusions. Program No. 875.4. Society for Neuroscience 33rd Annual Meeting, New Orleans, November 8 - 12, 2003

Cairns NJ, Lee V M-Y, Trojanowski JQ (2004) The cytoskeleton in neurodegenerative diseases (review article). Journal of Pathology 204: 438-449

Cairns NJ, Uryu K, Bigio E, Mackenzie IRA, Gearing M, Duyckaerts C, Yokoo H, Nakazato Y, Jaros E, Perry RH, Arnold SE, Lee V M-Y, Trojanowski JQ (2004) a-Internexin is a major component of the pathological inclusions of neuronal intermediate filament inclusion disease (NIFID) and a minor component of other neurodegenerative diseases. Acta Neuropathologica  108: 213-223

Cairns NJ, Zhukareva V, Uryu K, Zhang B, Bigio E, Mackenzie IRA, Gearing M, Duyckaerts C, Yokoo H, Nakazato Y, Jaros E, Perry RH, Lee VM-Y, Trojanowski JQ (2004) a-Internexin is Present in the Pathological Inclusions of Neuronal Intermediate Filament Inclusion Disease. Am J Pathol 164: 2153-2161 

Chen XH, Meaney DF, Xu BN, Nonaka M, Mcintosh TK, Wolf JA, Saatman KE, Smith DH. (1999) Evolution of neurofilament subtype accumulation in axons following diffuse brain injury in the pig. JOURNAL OF NEUROPATHOLOGY AND EXPERIMENTAL NEUROLOGY 58: (6) 588-596 JUN 1999

Cleveland DW, Monteiro MJ, Wong PC, Gill SR, Gearhart JD and Hoffman PN (1991) Involvement of neurofilaments in the radial growth of axons. J Cell Sci 15: 85-95

Dickson TC, King CE, McCormack GH, Vickers JC. (1999) Neurochemical diversity of dystrophic neurites in the early and late stages of Alzheimer's disease. EXPERIMENTAL NEUROLOGY 156: (1) 100-110 MAR 1999

Dickson, TC and Vickers, JC (2001) The morphological phenotype of beta-amyloid plaques and associated neuritic changes in Alzheimer's disease. NEUROSCIENCE 105: 99-107

Dowjat, WK, Wisniewski, H and Wisniewski, T (2001) Alzheimer's disease presenilin-1 expression modulates the assembly of neurofilaments. NEUROSCIENCE 103: 1-8

Eidenmuller, J, Fath, T, Maas, T, Pool, M, Sontag, E and Brandt, R (2001) Phosphorylation-mimicking glutamate clusters in the proline-rich region are sufficient to simulate the functional deficiencies of hyperphosphorylated tau protein. BIOCHEMICAL JOURNAL 357: 759-767

ERRANTE_LD, WICHE_G, SHAW_G. (1994) DISTRIBUTION OF PLECTIN, AN INTERMEDIATE FILAMENT-ASSOCIATED  PROTEIN, IN THE ADULT-RAT CENTRAL-NERVOUS-SYSTEM. JOURNAL OF NEUROSCIENCE RESEARCH, 1994, Vol.37, No.4, pp.515-528

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Eyer J and Peterson A (1994) Neurofilament-deficient axons and perikaryal aggregates in viable transgenic mice expressing a neurofilament beta-galactosidase fusion protein. Neuron 12: 389-405

Figlewicz DA, Rouleau GA, Krizus A, Julien JP. (1993) Polymorphism in the multi-phosphorylation domain of the human neurofilament heavy-subunit-encoding gene. Gene, 1993 Oct, 132:2, 297-300

Fountoulakis M,  Hardmeier R, Höger H and Lubec G (2001) Postmortem Changes in the Level of Brain Proteins. EXPERIMENTAL NEUROLOGY 167: 86-94

Galvin_JE, Lee_VMY, Baba_M, Mann_DMA, Dickson_DW, Yamaguchi_H, Schmidt_ML, Iwatsubo_T, Trojanowski_JQ. (1997) Monoclonal antibodies to purified cortical lewy bodies recognize the mid-size neurofilament subunit.  ANNALS OF NEUROLOGY,1997, Vol.42, No.4, pp.595-603

Gong, CX, Wang, JZ, Iqbal, K, Grundke-Iqbal, I (2003) Inhibition of protein phosphatase 2A induces phosphorylation and accumulation of neurofilaments in metabolically active rat brain slices. NEUROSCIENCE LETTERS 340: 107-110

Gou_JP, Leterrier_J. (1995) Possible involvement of ubiquitination in neurofilament degradation. BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 1995, Vol.217, No.2, pp.529-538

Haroutunian_V, Zhou_YL, Elder_G, Li_C, Lazzarini_RA. (1996) Age-dependent spatial memory deficits in transgenic mice expressing the human mid-sized neurofilament gene .1. MOLECULAR BRAIN RESEARCH, 1996, Vol.42, No.1, pp.62-70

Hashimoto_R, Nakamura_Y, Tsujio_I, Tanimukai_H, Kudo_T, Takeda_M. (1999) Quantitative analysis of neurofilament proteins in Alzheimer brain by enzyme linked immunosorbent assay system. PSYCHIATRY AND CLINICAL NEUROSCIENCES, 1999, Vol.53, No.5, pp.587-591

Herrmann H and Aebi U (2000) Intermediate filaments and their associates: multi-talented structural elements specifying cytoarchitecture and cytodynamics. Curr Opin Cell Biol 12: 79-90

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Holzer M, Holzapfel HP, Krohn K, Gertz HJ, Arendt T. (1999) Alterations in content and phosphorylation state of cytoskeletal proteins in the sciatic nerve during ageing and in Alzheimer's disease. JOURNAL OF NEURAL TRANSMISSION 106: (7-8) 743-755 1999

Hu, YY, He, SS, Wang, XC, Duan, QH, Khatoon, S, Iqbal, K, Grundke-Iqbal, I, Wang, JZ (2002) Elevated levels of phosphorylated neurofilament proteins in cerebrospinal fluid of Alzheimer disease patients. NEUROSCIENCE LETTERS 320: 156-160

Huc_C, Escurat_M, Djabali_K, Derer_M, Landon_F, Gros_F, Portier_MM. (1989) Phosphorylation Of Peripherin, An Intermediate Filament Protein, In Mouse Neuro-Blastoma Nie-115 Cell-Line And In Sympathetic Neurons. BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 1989, Vol.160, No.2, pp.772-779

James_ND, Davis_DR, Sindon_J, Hanger_DP, Brion_JP, Miller_CCJ, Rosenberg_MP, Anderton_BH, Propst_F. (1996) Neurodegenerative changes including altered tau phosphorylation and neurofilament immunoreactivity in mice transgenic for the serine threonine kinase Mos. NEUROBIOLOGY OF AGING, 1996, Vol.17, No.2, pp.235-241

Johnstone_M, Goold_RG, Fischer_I, GordonWeeks_PR. (1997) The neurofilament antibody RT97 recognises a developmentally regulated phosphorylation epitope on microtubule-associated protein 1B. JOURNAL OF ANATOMY, 1997, Vol.191, No.Pt2, pp.229-244

Josephs, KA, Holton, JL, Rossor, MN, Braendgaard, H, Ozawa, T, Fox, NC, Petersen, RC, Pearl, GS, Ganguly, M, Rosa, P, Laursen, H, Parisi, JE, Waldemar, G, Quinn, NP, Dickson, DW, Revesz, T (2003) Neurofilament inclusion body disease: a new proteinopathy? BRAIN 126: 2291-2303

Julien JP; Mushynski WE. (1998) Neurofilaments in health and disease.Prog Nucleic Acid Res Mol Biol, 1998, 61:, 1-23

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Jung C; Yabe JT; Shea TB (2000) C-terminal phosphorylation of the high molecular weight neurofilament subunit correlates with decreased neurofilament axonal transport velocity. Brain Res 856:12-19

Kanayama_G, Takeda_M, Niigawa_H, Ikura_Y, Tamii_H, Taniguchi_N, Kudo_T, Miyamae_Y, Morihara_T, Nishimura_T. (1996) The effects of repetitive mild brain injury on cytoskeletal protein and behavior. METHODS AND FINDINGS IN EXPERIMENTAL AND CLINICAL PHARMACOLOGY, 1996, Vol.18, No.2, pp.105-115

KARLSSON_JE, ROSENGREN_LE, HAGLID_KG. (1989) POLYCLONAL ANTISERA TO THE INDIVIDUAL NEUROFILAMENT TRIPLET PROTEINS - A CHARACTERIZATION USING ELISA AND IMMUNOBLOTTING. JOURNAL OF NEUROCHEMISTRY, 1989, Vol.53, No.3, pp.759-765

Kayyali_US, Zhang_W, Yee_AG, Seidman_JG, Potter_H. (1997) Cytoskeletal changes in the brains of mice lacking calcineurin A alpha. JOURNAL OF NEUROCHEMISTRY, 1997, Vol.68, No.4, pp.1668-1678

Kesavapany S, Patel V, Zheng YL, Pareek TK, Bjelogrlic M, Albers W, Amin N, Jaffe H, Gutkind JS, Strong MJ, Grant P, Pant HC (2007) Inhibition of Pin1 Reduces Glutamate-induced Perikaryal Accumulation of Phosphorylated Neurofilament-H in Neurons.
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Kong J and Xu Z (2000)  Overexpression of neurofilament subunit NF-L and NF-H extends survival of a mouse model for amyotrophic lateral sclerosis.  Neurosci Lett 281: 72-4

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Lee VM, Otvos L Jr, Schmidt ML, Trojanowski JQ. (1988b) Alzheimer disease tangles share immunological similarities with  multiphosphorylation repeats in the two large neurofilament proteins. Proc Natl Acad Sci U S A, 1988b Oct, 85:19, 7384-8

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Liu, Q, Xie, F, Siedlak, SL, Nunomura, A, Honda, K, Moreira, PI, Zhua, X, Smith, MA, Perry, G (2004) Neurofilament proteins in neurodegenerative diseases. CELLULAR AND MOLECULAR LIFE SCIENCES 61: 3057-3075

Liu, SJ, Fang, ZY, Yang, Y, Deng, HM, Wang, JZ (2003) Alzheimer-like phosphorylation of tau and neurofilament induced by cocaine in vivo. ACTA PHARMACOLOGICA SINICA 24: 512-518

Miller, CCJ, Ackerley, S, Brownlees, J, Grierson, AJ, Jacobsen, NJO, Thornhill, P (2002) Axonal transport of neurofilaments in normal and disease states. CELLULAR AND MOLECULAR LIFE SCIENCES 59: 323-330

Mosaheb S, Thorpe JR, Hashemzadeh-Bonehi L, Bigio EH, Gearing M, Cairns NJ (2005) Neuronal intranuclear inclusions are ultrastructurally and immunologically distinct from cytoplasmic inclusions of neuronal intermediate filament inclusion disease (NIFID). Acta Neuropathologica 110: 360-368 

Nakamura Y; Hashimoto R; Kashiwagi Y; Aimoto S; Fukusho E; Matsumoto N; Kudo T; Takeda M (2000) Major phosphorylation site (Ser55) of neurofilament L by cyclic AMP-dependent protein kinase in rat primary neuronal culture. J Neurochem 74: 949-59

Nakamura_Y, Hasimoto_R, Kashiwagi_Y, Miyamae_Y, Shinosaki_K, Nishikawa_T, Hattori_H, Kudo_T, Takeda_M.(1997) Abnormal distribution of neurofilament L in neurons with Alzheimer's disease. NEUROSCIENCE LETTERS, 1997, Vol.225, No.3, pp.201-204

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Nguyen, MD, Lariviere, RC and Julien, JP (2001) Deregulation of Cdk5 in a mouse model of ALS: Toxicity alleviated by perikaryal neurofilament inclusions. NEURON 30: 135-147

Oron_L, Dubovik_V, Novitsky_L, Eilam_D, Michaelson_DM. (1997) Animal model and in vitro studies of anti neurofilament antibodies mediated neurodegeneration in Alzheimer's disease. JOURNAL OF NEURAL TRANSMISSION-SUPPLEMENT, 1997, No.49, pp.77-84

Pollak, D, Cairns, N, Lubec, G (2003) Cytoskeleton derangement in brain of patients with Down Syndrome, Alzheimer's disease and Pick's disease. JOURNAL OF NEURAL TRANSMISSION-SUPPLEMENT 67: 149-158

Porchet, R, Probst, A, Draber, P, Riederer, IM, Riederer, BM (2003) Differential subcellular localization of phosphorylated neurofilament and tau proteins in degenerating neurons of the human entorhinal cortex. NEUROREPORT 14: 929

Radenahmad, N, Neal, JW, Wilcock, G, Pearson, RCA (2003) A neurofilament antibody recognizes a subset of pyramidal cells in the human neocortex that are preserved in Alzheimer's disease. NEUROPATHOLOGY AND APPLIED NEUROBIOLOGY 29: 316-320

Rao, MV, Nixon, RA (2003) Defective neurofilament transport in mouse models of amyotrophic lateral sclerosis: A review. NEUROCHEMICAL RESEARCH 28: 1041-1047

Ray SK, Fidan M, Nowak MW, Wilford GG, Hogan EL and  Banik NL (2000) Oxidative stress and Ca2+ influx upregulate calpain and induce apoptosis in PC12 cells. Brain Res 852: 326-34

Rempel, H, Kusdra, L and Pulliam, L (2001) Interleukin-1 beta up-regulates expression of neurofilament light in human neuronal cells. JOURNAL OF NEUROCHEMISTRY 78: 640-645

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