On the organization of astrocytic gap junctions in rat brain as suggested by LM and EM immunohistochemistry of connexin43 expression
Abstract
Gap junctions and the intercellular communication syncytium they form between glial cells are thought to play a critical role in glial maintenance of appropriate metabolic environments in neural tissues. We have previously suggested (Yamamoto et al., Brain Res. 508:313–319, '90) that the vast majority of astrocytes in rat brain express connexin43, one of several recently identified gap junction proteins. Here, we confirm ultrastructurally that astrocytes in a number of brain regions of rat are immunolabelled with an antibody against connexin43 and that neurons and oligodendrocytes are devoid of labelling. The distribution of connexin43 immunoreactivity throughout the brain is presented at the light microscope (LM) level. By LM, immunoreactive structures consisted primarily of round or elongated puncta ranging from 0.3 μm to 4 μm in length and of annular profiles ranging from 1 to 10 μm in diameter. Immunolabelled fibrous processes were only occasionally seen and no labelling was observed in astrocytic cell bodies. Long, linear arrays of puncta were rare in gray matter but were common in white matter where they were arranged parallel to myelinated fibers. Puncta organized in a honeycomb pattern were seen near the cerebral cortical surface and frequently around blood vessels. Regional immunoreaction density, which was a reflection of either the concentration or staining intensity of immunoreactive elements, was remarkably heterogeneous; dramatic differences in labelling intensity frequently delineated anatomical boundaries between adjacent nuclei. Abrupt as well as graded fluctuations of immunoreaction intensity were also observed within nuclear structures. By electron microscopy (EM), gap junctions of fibrous and protoplasmic astrocytes were intensely stained and labelled organelles were often observed intracellularly in areas near gap junctions. These junctions and the spread of immunoreaction product to perijunctional organelles in their vicinity were considered to correspond to puncta seen by LM. Labelling within astrocytic cell bodies was seen in only a few instances. In some brain areas, astrocytic processes commonly gave rise to immunoreactive lamellae that partially ensheathed neuronal cell bodies, axon terminals, dendrites, and synaptic glomeruli. Such lamellae were considered to correspond to immunoreactive annular profiles seen by LM. Perivascular endfoot processes of astrocytes displayed intense staining of their gap junctions and portions of their apposing membranes. To the extent that regional differences and ultrastructural localization of connexin43 immunoreactivity reveal global distributions of astrocytic gap junctions composed of connexin43, we suggest (1) that the absence of widespread cytoplasmic labelling within astrocytes may be indicative of local connexin43 synthesis near gap junctions, (2) that small scale heterogeneities within nuclei may reflect relationships between the organizational patterns of glial gap junctions and neural systems, and (3) that enormous variations in demands for gap junctional coupling within astrocytic “functional syncytia” of different brain regions may lead to the establishment of largely separate syncytial compartments.
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Astrocytes express gap junction proteins CX30 and CX43.
“Astrocytes express gap junction proteins CX30 and CX43 (167, 377, 665).”
From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [665]
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Gap junctions in the brain: where, what type, how many and why?
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Rash, J. E., Yasumura, T., Dudek, F. E., & Nagy, J. I. (2001) · Journal of Neuroscience · doi:10.1523/jneurosci.21-06-01983.2001 · Cited by 432 · see citing works
“Antibodies used for freeze-fracture immunogold labeling Antibody Type Epitope; designation Reference; source Connexin 30 Polyclonal C terminal; 71-2200 Nagy et al., 1999; Zymed Connexin 30 Monoclonal C terminal; 33-2500 Zymed Connexin 32 Monoclonal aa 235-246; 7C7 Li et al., 1997 Connexin 32 Monoclonal aa 224-234; 92B…”
BackgroundInfluentialSelf-citationConnexins and gap junctions of astrocytes and oligodendrocytes in the CNS
Nagy, J. I., & Rash, J. E. (2000) · Brain Research Reviews · doi:10.1016/s0165-0173(99)00066-1 · Cited by 424 · see citing works
Self-citationUpdate on connexins and gap junctions in neurons and glia in the mammalian nervous system
Nagy, J. I., Dudek, F. E., & Rash, J. E. (2004) · Brain Research Reviews · doi:10.1016/j.brainresrev.2004.05.005 · Cited by 375 · see citing works
“The above observations are consistent with thin-section immunoEM evidence that astrocytic and oligodendrocytic connexins are co-associated [69,97,98,103,167].”
BackgroundResultSelf-citationControl of gap-junctional communication in astrocytic networks
Giaume, C., & McCarthy, K. D. (1996) · Trends in Neurosciences · doi:10.1016/0166-2236(96)10046-1 · Cited by 375 · see citing works
Nagy, J. I., Patel, D., Ochalski, P. A. Y., & Stelmack, G. L. (1999) · Neuroscience · doi:10.1016/s0306-4522(98)00191-2 · Cited by 346 · see citing works
Self-citationGap junctions and connexin expression in the normal and pathological central nervous system
Rouach, N., Avignone, E., Même, W., Koulakoff, A., Venance, L., Blomstrand, F., & Giaume, C. (2002) · Biology of the Cell · doi:10.1016/s0248-4900(02)00016-3 · Cited by 345 · see citing works
“Both Cx26 and Cx43 have been detected in ependymal cells (Dermietzel et al., 1989; Yamamoto et al., 1990; Yamamoto et al., 1992).”
BackgroundElectrical synapses: a dynamic signaling system that shapes the activity of neuronal networks
Hormuzdi, S. G., Filippov, M. A., Mitropoulou, G., Monyer, H., & Bruzzone, R. (2004) · Biochimica et Biophysica Acta (BBA) - Biomembranes · doi:10.1016/j.bbamem.2003.10.023 · Cited by 329 · see citing works
Rash, J. E., Staines, W. A., Yasumura, T., Patel, D., Furman, C. S., Stelmack, G. L., & Nagy, J. I. (2000) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.97.13.7573 · Cited by 293 · see citing works
Self-citationGLIA-NEURON INTERCOMMUNICATIONS AND SYNAPTIC PLASTICITY
Vernadakis, A. (1996) · Progress in Neurobiology · doi:10.1016/s0301-0082(96)00012-3 · Cited by 268 · see citing works
Intramolecular interactions mediate pH regulation of connexin43 channels
Morley, G. E., Taffet, S. M., & Delmar, M. (1996) · Biophysical Journal · doi:10.1016/s0006-3495(96)79686-8 · Cited by 267 · see citing works
Differential Expression of Connexins during Neocortical Development and Neuronal Circuit Formation
Nadarajah, B., Jones, A., Evans, W. H., & Parnavelas, J. G. (1997) · Journal of Neuroscience · doi:10.1523/jneurosci.17-09-03096.1997 · Cited by 254 · see citing works
“…into fibrillary and protoplasmic astrocytes (Choi and Lapham, 1978; Schmechel and Rakic, 1979) and are added to the existing population of astrocytes known to form networks connected by gap junctions in the cortex (Bennett and Goodenough, 1978; Massa and Mugnaini, 1982; Yamamoto et al., 1990).”
BackgroundGap Junctions Couple Astrocytes and Oligodendrocytes
Orthmann‐Murphy, J. L., Abrams, C. K., & Scherer, S. S. (2008) · Journal of Molecular Neuroscience · doi:10.1007/s12031-007-9027-5 · Cited by 247 · see citing works
Connexin and pannexin hemichannels in brain glial cells: properties, pharmacology, and roles
Giaume, C., Leybaert, L., Naus, C. C. G., & Sáez, J. C. (2013) · Frontiers in Pharmacology · doi:10.3389/fphar.2013.00088 · Cited by 232 · see citing works
“…situation is also likely true at the gliovascular interface where there is a high level of Cx expression between astroglial perivascular endfeet (Yamamoto et al., 1990; Simard et al., 2003; Rouach et al., 2008) and where Ca2+ waves propagate from one initial endfoot to its neighbors (Mulligan…”
BackgroundIntrinsic membrane properties of vertebrate vestibular neurons: Function, development and plasticity
Straka, H., Vibert, N., Vidal, P. P., Moore, L. E., & Dutia, M. B. (2005) · Progress in Neurobiology · doi:10.1016/j.pneurobio.2005.10.002 · Cited by 228 · see citing works
Unidirectional Coupling of Gap Junctions Between Neuroglia
Robinson, S. R., Hampson, E. C. G. M., Munro, M. N., & Vaney, D. I. (1993) · Science · doi:10.1126/science.8093125 · Cited by 221 · see citing works
Connexin43 null mice reveal that astrocytes express multiple connexins
Dermietzel, R., Gao, Y., Scemes, E., Vieira, D., Urban, M., Kremer, M., Bennett, M. V. L., & Spray, D. C. (2000) · Brain Research Reviews · doi:10.1016/s0165-0173(99)00067-3 · Cited by 212 · see citing works
Nagy, J. I., Li, X., Rempel, J., Stelmack, G. L., Patel, D., Staines, W. A., Yasumura, T., & Rash, J. E. (2001) · The Journal of Comparative Neurology · doi:10.1002/cne.1414 · Cited by 212 · see citing works
“Astrocytes are richly invested with IMPs on both P- and E-faces, lack tight junctions, and have numerous gap junctions, .80% of which have been demonstrated by FRIL to contain both Cx43 and Cx30 (Rash et al., 2001).”
InfluentialSelf-citationGliopathic Pain: When Satellite Glial Cells Go Bad
Ohara, P. T., Vit, J., Bhargava, A., Romero‐Reyes, M., Sundberg, C. W., Charles, A. C., & Jasmin, L. (2009) · The Neuroscientist · doi:10.1177/1073858409336094 · Cited by 207 · see citing works
Nagy, J. I., Ionescu, A. V., Lynn, B. D., & Rash, J. E. (2003) · Glia · doi:10.1002/glia.10278 · Cited by 205 · see citing works
“Following identification of Cx43 expression in astrocytes (Dermietzel et al., 1989; Yamamoto et al., 1990a,b) and Cx32 expression in oligodendrocytes (Scherer et al., 1995; Dermietzel et al., 1997; Kunzelmann et al., 1997; Li et al., 1997), the nature of gap junction channels between these two cell…”
BackgroundSelf-citationGap junctions and neurological disorders of the central nervous system
Nakase, T., & Naus, C. C. G. (2004) · Biochimica et Biophysica Acta (BBA) - Biomembranes · doi:10.1016/j.bbamem.2004.01.009 · Cited by 205 · see citing works
“Moreover, gap junctions provide a substrate for formation of a functional astrocytic syncytium [70,71, 74,75], implicated in the spatial buffering capacity of astrocytes, particularly in dealing with extracellular K arising from neuronal activity [76,77].”
BackgroundEugenín, E. A., Brañes, M. C., Berman, J. W., & Sáez, J. C. (2003) · The Journal of Immunology · doi:10.4049/jimmunol.170.3.1320 · Cited by 201 · see citing works
“Previously characterized rabbit polyclonal anti-connexin43 Ab (22) and mouse anti-connexin32 mAb (23) were kindly provided by E.”
MethodMolecular characterization and functional expression of the human cardiac gap junction channel.
Fishman, G. I., Spray, D. C., & Leinwand, L. A. (1990) · The Journal of Cell Biology · doi:10.1083/jcb.111.2.589 · Cited by 201 · see citing works
“An immunoblot was made using a polyclonal antibody directed against a synthetic polypeptide corresponding to residues 346-363 of the rat cormexin43 protein (Yamamoto et al., 1990), followed by t25I-labeled protein A.”
MethodCronin, M. S., Anderson, P. N., Cook, J. E., Green, C. R., & Becker, D. L. (2008) · Molecular and Cellular Neuroscience · doi:10.1016/j.mcn.2008.06.005 · Cited by 186 · see citing works
“Cx43 protein can be found throughout the adult mammalian CNS (Yamamoto et al., 1990), predominantly associated with astrocytic gap junctions.”
Elevated connexin43 immunoreactivity at sites of amyloid plaques in alzheimer's disease
Nagy, J. I., Li, W., Hertzberg, E. L., & Marotta, C. A. (1996) · Brain Research · doi:10.1016/0006-8993(95)01526-4 · Cited by 180 · see citing works
Self-citationKamasawa, N., Sik, A., Morita, M., Yasumura, T., Davidson, K. G., Nagy, J. I., & Rash, J. (2005) · Neuroscience · doi:10.1016/j.neuroscience.2005.08.027 · Cited by 22 · see citing works
Self-citationZeeuw, C. D., El, H., & Mugnaini, E. (1995) · Journal of Neuroscience · doi:10.1523/jneurosci.15-02-01587.1995 · Cited by 174 · see citing works
In vivo growth of C6 glioma cells transfected with connexin43 cDNA.
Naus, C. C. G., Elisevich, K. V., Zhu, D., Belliveau, D. J., & Maestro, R. F. D. (1992) · PubMed · Cited by 171 · see citing works
Donahue, H. J., Mcleod, K. J., Rubin, C. T., Andersen, J., Grine, E., Hertzberg, E. L., & Brink, P. R. (1995) · Journal of Bone and Mineral Research · doi:10.1002/jbmr.5650100609 · Cited by 170 · see citing works
Self-citationEnergy metabolism in the brain
Hertz, L., & Dienel, G. A. (2002) · International review of neurobiology · doi:10.1016/s0074-7742(02)51003-5 · Cited by 163 · see citing works
Peretto, P., Giachino, C., Aimar, P., Fasolo, A., & Bonfanti, L. (2005) · The Journal of Comparative Neurology · doi:10.1002/cne.20576 · Cited by 162 · see citing works
“Indeed, the high expression of low-adhesive polysialic acid on fast-migrating cells contained within a semi-rigid system of astrocytes might explain the occurrence of enlarged intercellular spaces (see also Yang et al., 1992).”
BackgroundCotrina, M. L., & Nedergaard, M. (2001) · Journal of Neuroscience Research · doi:10.1002/jnr.10121 · Cited by 162 · see citing works
“They are a particular feature of adult astrocytes, with more than 50,000 gap junction channels interconnecting each astrocyte to its neighbors (Yamamoto et al., 1990), in contrast to neurons and other brain cells, which are poorly coupled.”
BackgroundMorphological properties of intracellularly labeled layer I neurons in rat neocortex
Zhou, F.-M., & Hablitz, J. J. (1996) · The Journal of Comparative Neurology · doi:10.1002/(sici)1096-9861(19961209)376:2 · Cited by 79 · see citing works
Rash, J. E. (2009) · Neuroscience · doi:10.1016/j.neuroscience.2009.10.028 · Cited by 153 · see citing works
Extracellular Ca 2+ Acts as a Mediator of Communication from Neurons to Glia
Torres, A., Wang, F., Xu, Q., Fujita, T., Dobrowolski, R., Willecke, K., Takano, T., & Nedergaard, M. (2012) · Science Signaling · doi:10.1126/scisignal.2002160 · Cited by 153 · see citing works
“The slow Ca2+ wave evoked by MNI-glutamate photolysis requires Cx43/Cx30 Our pharmacological analysis indicated that the initial fast Ca2+ wave evoked by MNI-glutamate photolysis was a result of glutamate receptor activation (Fig.”
BackgroundInfluentialElectrophysiological Characteristics of Reactive Astrocytes in Experimental Cortical Dysplasia
Bordey, A., Lyons, S. A., Hablitz, J. J., & Sontheimer, H. W. (2001) · Journal of Neurophysiology · doi:10.1152/jn.2001.85.4.1719 · Cited by 149 · see citing works
“It is likely that intracellular redistribution of K1 (spatial buffering) is further facilitated by intracellular coupling of astrocytes through gap junctions (Giaume et al. 1991; Mobbs et al. 1988; Yamamoto et al. 1990).”
Ultrastructural localization of GLUT 1 and GLUT 3 glucose transporters in rat brain
Leino, R. L., Gerhart, D. Z., Bueren, A. M. V., McCall, A. L., & Drewes, L. R. (1997) · Journal of Neuroscience Research · doi:10.1002/(sici)1097-4547(19970901)49:5 · Cited by 164 · see citing works
Condorelli, D. F., Salinaro, A. T., Mudò, G., Mirone, M. B., & Belluardo, N. (2003) · European Journal of Neuroscience · doi:10.1046/j.1460-9568.2003.02910.x · Cited by 141 · see citing works
Neurons control the expression of connexin 30 and connexin 43 in mouse cortical astrocytes
Koulakoff, A., Ezan, P., & Giaume, C. (2008) · Glia · doi:10.1002/glia.20698 · Cited by 130 · see citing works
“In astrocytes, GJ are mostly composed of Cx43 and Cx30 which display a distinct developmental expression profile and regional distribution (Nagy et al., 1999; Rouach et al., 2002; Yamamoto et al., 1990, 1992).”
BackgroundLi, X., Ionescu, A. V., Lynn, B. D., Lu, S., Kamasawa, N., Morita, M., Davidson, K. G. V., Yasumura, T., Rash, J. E., & Nagy, J. I. (2004) · Neuroscience · doi:10.1016/j.neuroscience.2004.03.063 · Cited by 127 · see citing works
Self-citationLoss-of-function GJA12/Connexin47 mutations cause Pelizaeus–Merzbacher-like disease
Orthmann‐Murphy, J. L., Enriquez, A. D., Abrams, C. K., & Scherer, S. S. (2007) · Molecular and Cellular Neuroscience · doi:10.1016/j.mcn.2007.01.010 · Cited by 123 · see citing works
“, 1997), and that each cell type expresses different connexins (Dermietzel et al., 1989; Yamamoto et al., 1990; Scherer et al., 1995; Dermietzel et al., 1997; Ochalski et al., 1997; Nagy et al., 1999; Altevogt et al., 2002; Menichella et al., 2003; Odermatt et al., 2003; Kleopa et al., 2004).”
BackgroundSzente, M. B., Gajda, Z., Ali, K. S., & Hermesz, E. (2002) · Neuroscience · doi:10.1016/s0306-4522(02)00533-x · Cited by 116 · see citing works
Fujita, A., Yamaguchi, H., Yamasaki, R., Cui, Y., Matsuoka, Y., Yamada, K., & Kira, J. (2018) · Journal of Neuroinflammation · doi:10.1186/s12974-018-1251-0 · Cited by 114 · see citing works
Glucose metabolism and proliferation in glia: role of astrocytic gap junctions
Tabernero, A., Medina, J. M., & Giaume, C. (2006) · Journal of Neurochemistry · doi:10.1111/j.1471-4159.2006.04088.x · Cited by 114 · see citing works
“…lactate) (Table 1); (ii) there is a high level of Cx43 and Cx30 expression between the end-feet of astrocytes that surround blood-vessels (Yamamoto et al. 1990; Nagy et al. 1999), and (iii) the inhibition of GJC increases the uptake of glucose by astrocytes, indicating that the rate of…”
BackgroundIntermediate filament change in astrocytes following mild cortical contusion
Baldwin, S. A., & Scheff, S. W. (1996) · Glia · doi:10.1002/(sici)1098-1136(199603)16:3 · Cited by 81 · see citing works
Reduced connexin 43 immunolabeling in the orbitofrontal cortex in alcohol dependence and depression
Miguel-Hidalgo, J. J., Wilson, B. A., Hussain, S., Meshram, A., Rajkowska, G., & Stockmeier, C. A. (2014) · Journal of Psychiatric Research · doi:10.1016/j.jpsychires.2014.04.007 · Cited by 110 · see citing works
“The gap junctions and hemichannel aggregates result in sharply contrasting immunoreactive puncta as confirmed by electron-microscopy (Nagy et al., 1996; Yamamoto et al., 1990).”
Kahn, M. A., Ellison, J. A., Speight, G. J., & de Vellis, J. (1995) · Brain Research · doi:10.1016/0006-8993(95)00411-i · Cited by 109 · see citing works
Penes, M., Li, X. (., & Nagy, J. I. (2005) · European Journal of Neuroscience · doi:10.1111/j.1460-9568.2005.04225.x · Cited by 115 · see citing works
“…we found that Cx30 and Cx43 in grey matter of brain parenchyma are colocalized in the vast majority of A-A gap junctions and are contained largely within these junctions, with very little detection of these proteins intracellularly (Yamamoto et al., 1990a,b; Nagy et al., 1999; Rash et al., 2001).”
BackgroundSelf-citationRozental, R., Morales, M., Mehler, M. F., Urban, M., Kremer, M., Dermietzel, R., Kessler, J. A., & Spray, D. C. (1998) · Journal of Neuroscience · doi:10.1523/jneurosci.18-05-01753.1998 · Cited by 107 · see citing works
“In contrast to detailed studies that have defined the connexin types present in glia (e.g., Dermietzel et al., 1989, 1991; Ransom and Kettenmann, 1990; Yamamoto et al., 1990; Giaume et al., 1991; Dermietzel and Spray, 1996), the connexins responsible for coupling in developing or adult neurons have not been reliably i…”
ResultGap junctions in the vertebrate retina
Cook, J. E., & Becker, D. L. (1995) · Microscopy Research and Technique · doi:10.1002/jemt.1070310510 · Cited by 107 · see citing works
“There are extensive gap junctions between neighbouring astrocytes, which form a typical functional syncytium (Yamamoto et al., 1990) in the innermost retina, raising the possibility of long-range astrocytic Ca2+ signalling (Finkbeiner, 1992) in such retinae.”
BackgroundMyelination Defects and Neuronal Hyperexcitability in the Neocortex of Connexin 32-deficient Mice
Sutor, B., Schmolke, C., Teubner, B., Schirmer, C. M., & Willecke, K. (2000) · Cerebral Cortex · doi:10.1093/cercor/10.7.684 · Cited by 106 · see citing works
“The gap junctions between these glial cells are formed predominantly by Cx43 (Yamamoto et al., 1990).”
BackgroundLi, W., Ochalski, P. A. Y., Hertzberg, E. L., & Nagy, J. I. (1998) · European Journal of Neuroscience · doi:10.1046/j.1460-9568.1998.00253.x · Cited by 106 · see citing works
“Astrocytes in the central nervous system (CNS) are extensively coupled via gap junctions containing high levels of Cx43 (Yamamoto et al., 1990a,b; Wolburg & Rohlmann, 1995; Giaume & McCarthy, 1996; Ochalskiet al., 1996).”
BackgroundMethodSelf-citationShinoura, N., Chen, L., Wani, M. A., Kim, Y. G., Larson, J. J., Warnick, R. E., Simon, M., Menon, A. G., Bi, W., & Stambrook, P. J. (1996) · Journal of neurosurgery · doi:10.3171/jns.1996.84.5.0839 · Cited by 104 · see citing works
Richter, K., Hamprecht, B., & Scheich, H. (1996) · Glia · doi:10.1002/(sici)1098-1136(199608)17:4 · Cited by 37 · see citing works
Nagy, J. I., Li, W., Roy, C., Doble, B. W., Gilchrist, J. S. C., Kardami, E., & Hertzberg, E. L. (1997) · Experimental Cell Research · doi:10.1006/excr.1997.3716 · Cited by 104 · see citing works
Self-citationSöhl, G., Güldenagel, M., Beck, H., Teubner, B., Traub, O., Gutiérrez, R., Heinemann, U., & Willecke, K. (2000) · Molecular Brain Research · doi:10.1016/s0169-328x(00)00195-9 · Cited by 103 · see citing works
CONNEXIN EXPRESSION IN HUNTINGTON'S DISEASED HUMAN BRAIN
Vis, J. C., Nicholson, L. F. B., Faull, R. L. M., Evans, W. H., Severs, N. J., & Green, C. R. (1998) · Cell Biology International · doi:10.1006/cbir.1998.0388 · Cited by 102 · see citing works
“Inconsistencies between GFAP and Cx43 levels have previously been reported in the grey matter (Yamamoto et al., 1990a) and regional specificity in coupling (Lee et al., 1994) and gap junction labelling (Nagy et al., 1999) between astrocytes has been reported in different regions of the rat brain.”
BackgroundResultInfluentialStructure-Function Relationships in Gap Junctions
Wolburg, H., & Rohlmann, A. (1995) · International review of cytology · doi:10.1016/s0074-7696(08)62161-0 · Cited by 102 · see citing works
Shapes of astrocyte networks in the juvenile brain
Houades, V., Rouach, N., Ezan, P., Kirchhoff, F., Koulakoff, A., & Giaume, C. (2006) · Neuron Glia Biology · doi:10.1017/s1740925x06000081 · Cited by 97 · see citing works
“However, such patchy distribution of Cx43 has been reported for the hippocampus (stratum radiatum) in the adult rat (Yamamoto et al., 1990).”
BackgroundZeeuw, C. I. D., Koekkoek, S. K. E., WYLIE, D. R. W., & Simpson, J. I. (1997) · Journal of Neurophysiology · doi:10.1152/jn.1997.77.4.1747 · Cited by 97 · see citing works
“…1989; Matsumoto et al. 1991; Micevych and sity of dedritic lamellar bodies in the inferior olive is higher than in Abelson 1991; Nagy et al. 1988; Naus et al. 1990; Shiosaka any other area of the brain, this conclusion implies that electrotonic et al. 1989; Yamamoto et al. 1989, 1990a,b) .”
Backgroundde Lima, A. D., Merten, M. D. P., & Voigt, T. (1997) · The Journal of Comparative Neurology · doi:10.1002/(sici)1096-9861(19970602)382:2 · Cited by 80 · see citing works
Self-citationNagy, J. I., Ionescu, A. V., Lynn, B. D., & Rash, J. E. (2003) · The Journal of Comparative Neurology · doi:10.1002/cne.10797 · Cited by 95 · see citing works
“Immunofluorescence for Cx43 throughout the brain appeared as densely distributed puncta, most of which represented labeling of gap junctions between astrocytes (Yamamoto et al., 1990a,b).”
BackgroundSelf-citationLee, I., Lindqvist, E., Kiehn, O., Widenfalk, J., & Olson, L. (2005) · The Journal of Comparative Neurology · doi:10.1002/cne.20567 · Cited by 95 · see citing works
“Gap junctions are targets for a number of cytokines, neurotransmitters, growth factors, and endogenous bioactive lipids (Rouach et al., 2002) and also are sensitive to pH (Morley et al., 1996) and phosphorylation (Zhou et al., 1999).”
BackgroundGJA1 (connexin43) is a key regulator of Alzheimer’s disease pathogenesis
Kajiwara, Y., Wang, E., Wang, M., Sin, W. C., Brennand, K., Schadt, E. E., Naus, C. C. G., Buxbaum, J. D., & Zhang, B. (2018) · Acta Neuropathologica Communications · doi:10.1186/s40478-018-0642-x · Cited by 93 · see citing works
Hossain, M. Z., Peeling, J., Sutherland, G. R., Hertzberg, E. L., & Nagy, J. I. (1994) · Brain Research · doi:10.1016/0006-8993(94)90242-9 · Cited by 93 · see citing works
Self-citationNagy, J. I., Ochalski, P. A. Y., Li, J., & Hertzberg, E. L. (1997) · Neuroscience · doi:10.1016/s0306-4522(96)00584-2 · Cited by 92 · see citing works
Self-citationPostnatal development of dye‐coupling among astrocytes in rat visual cortex
Binmöller, F.-J., & Müller, C. M. (1992) · Glia · doi:10.1002/glia.440060207 · Cited by 90 · see citing works
Ochalski, P. A. Y., Frankenstein, U. N., Hertzberg, E. L., & Nagy, J. I. (1996) · Neuroscience · doi:10.1016/s0306-4522(96)00394-6 · Cited by 89 · see citing works
Self-citationDistribution of choline acetyltransferase-immunoreactive structures in the lamprey brain
Pombal, M. A., Marín, Ó., & Gonz�lez, A. (2001) · The Journal of Comparative Neurology · doi:10.1002/1096-9861(20010226)431:1 · Cited by 134 · see citing works
Chédotal, A., Umbriaco, D., Descarries, L., Hartman, B. K., & Hamel, É. (1994) · The Journal of Comparative Neurology · doi:10.1002/cne.903430105 · Cited by 88 · see citing works
Farahani, R., Pina-Benabou, M. H. D., Kyrozis, A., Siddiq, A., Barradas, P. C., Chiu, F., Cavalcante, L. A., Lai, J. C. K., Stanton, P. K., & Rozental, R. (2005) · Glia · doi:10.1002/glia.20213 · Cited by 87 · see citing works
“Therefore, it is important to investigate the kinetic and regulatory properties of glycolytic and TCA cycle enzymes in astrocytes, in comparison to neurons, to improve our understanding of these two important pathways in other CNS cell types.”
BackgroundInfluentialIdentification of connexin36 in gap junctions between neurons in rodent locus coeruleus
Rash, J. E., Olson, C. O., Davidson, K. G. V., Yasumura, T., Kamasawa, N., & Nagy, J. I. (2007) · Neuroscience · doi:10.1016/j.neuroscience.2007.04.061 · Cited by 85 · see citing works
Self-citationHeterogeneity in gap junction expression in astrocytes cultured from different brain regions
Batter, D. K., Corpina, R. A., Roy, C., Spray, D. C., Hertzberg, E. L., & Kessler, J. A. (1992) · Glia · doi:10.1002/glia.440060309 · Cited by 85 · see citing works
Self-citationNew insights into the expression and function of neural connexins with transgenic mouse mutants
Söhl, G., Odermatt, B., Maxeiner, S., Degen, J., & Willecke, K. (2004) · Brain Research Reviews · doi:10.1016/j.brainresrev.2004.05.006 · Cited by 84 · see citing works
Yamamoto, T., Vukelic, J., Hertzberg, E. L., & Nagy, J. I. (1992) · Developmental Brain Research · doi:10.1016/0165-3806(92)90077-a · Cited by 83 · see citing works
Self-citationBikson, M., Ghai, R. S., Baraban, S. C., & Durand, D. M. (1999) · Journal of Neurophysiology · doi:10.1152/jn.1999.82.5.2262 · Cited by 83 · see citing works
“…a small number of nearby CA1 pyramidal cells (Perez-Velazquez et al. 1984), CA1 astrocytes are characterized by an extremely high degree of cell-to-cell coupling among hundreds of cells (D’Ambrosio et al. 1998) and express high levels of connexins (Dermietzel and Spray 1993; Yamamoto et al. 1990).”
BackgroundKonietzko, U., & Müller, C. M. (1994) · Hippocampus · doi:10.1002/hipo.450040313 · Cited by 83 · see citing works
Modeling Working Memory in a Spiking Neuron Network Accompanied by Astrocytes
Gordleeva, S., Tsybina, Y., Krivonosov, M., Ivanchenko, M., Zaikin, A. A., Kazantsev, V., & Gorban, A. N. (2021) · Frontiers in Cellular Neuroscience · doi:10.3389/fncel.2021.631485 · Cited by 79 · see citing works
Nicolelis, M. A. L., Chapin, J. K., & Lin, R. C.-S. (1995) · Neuroscience · doi:10.1016/0306-4522(94)00493-o · Cited by 82 · see citing works
Astroglia: Important mediators of traumatic brain injury
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Gap Junctions Formed of Connexin43 Are Found Between Smooth Muscle Cells of Human Corpus Cavernosum
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Self-citationUp-regulation of Connexin43 in the glial scar following photothrombotic ischemic injury
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“Therefore, although both proteins are localized in astrocytes, their subcellular colocalization is rather poor (Yamamoto et al., 1990).”
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Expression and function of astrocytic gap junctions in aging
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Quantitative immunohistochemical and biochemical correlates of connexin43 localization in rat brain
Nagy, J. I., Yamamoto, T., Sawchuk, M. A., Nance, D. M., & Hertzberg, E. L. (1992) · Glia · doi:10.1002/glia.440050102 · Cited by 71 · see citing works
Self-citationConnexin immunoreactivity in glial cells of the rat retina
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Expression of connexin43 mRNA in adult rodent brain
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“Connexin43 immunoreactivity was most abundant in astrocytes, as was evident from ultrathin brain sections and postnatal cultured astrocytes (Dermietzel et al. 1989; Shiosaka et al. 1989; Yamamoto et al. 1990; Dermietzel et al. 1991; Giaume et al. 1991).”
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“Only a moderate degree of Cx43 dephosphorylation occurs under standard perfusion fixation conditions previously used to prepare brain tissue for immunohistochemical analysis (Yamamoto et al., 1990; Nagy et al., 1992).”
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Increased intercellular communication in mouse astrocytes exposed to hyposmotic shocks
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Physiology of Bergmann Gllal Cells
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“Homologous intercellular as well as autologous astrocyte– astrocyte gap junctions formed by various combinations of Cx26, Cx30 and Cx43 link astrocyte processes at their ensheathments of neuronal and vascular elements (Mugnaini, 1986; Yamamoto et al., 1990; Wolburg & Rohlmann, 1995).”
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“…polyclonal antibody (generously provided by Elliot Hertzberg, Albert Einstein College of Medicine, Bronx, NY; directed to the carboxy terminus at amino acid residues 346-360; Nagy et al., 1992; Yamamoto, et al., 1990) or anti-13-gal polyclonal antibody (Cappel Laboratories, West Chester , PA).”
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“We previously reported that the distribution of Cx43 in rat brain is highly heterogeneous as observed by regional immunohistochemical and Western blot analysis (Nagy et al., 1992; Yamamoto et al., 1990).”
Self-citation
- Authors
- Yamamoto, T., Ochalski, A., Hertzberg, E. L., & Nagy, J. I.
- Affiliations
- University of Manitoba (CA)
- Albert Einstein College of Medicine (US)
- Corresponding author
- Nagy, J. I.
- Venue
- Journal of Comparative Neurology
- Publisher
- Wiley
- Published
- 1990-12-22
- Volume
- 302
- Issue
- 4
- Pages
- 853-883
- ISSN
- 0021-9967 (ISSN-L)
- 1096-9861
- OpenAlex
- W2116763991
- Cited by
- 230
- References
- 110
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 1 · 2023: 4 · 2022: 3 · 2021: 5 · 2020: 2 · 2019: 1 · 2018: 6 · 2017: 5 · 2016: 2 · 2015: 3 · 2014: 2 · 2013: 5 · 2012: 3
- FWCI
- 3.00
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Journal of Comparative Neurology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (5r01gm030667-14)
- National Institute of General Medical Sciences (GM 30667)
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD00713)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Connexins and lens biology
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
- Keywords
- astrocytes, connexin 43, gap junctions, astrocyte ultrastructure, immunoreactivity distribution, white matter, gray matter, astrocyte-neuron communication, cerebral cortex, rat brain
- MeSH terms
- Animals, Astrocytes, Brain Chemistry, Immunoenzyme Techniques, Intercellular Junctions, Male, Membrane Proteins, Microscopy, Electron, Myocardium, Nerve Tissue Proteins, Organ Specificity, Rats, Inbred Strains, Connexins, Rats
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