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Vijayalakshmi, K. ; Anand Alladi, Phalguni ; Ghosh, Shampa ; Prasanna, V. K. ; Sagar, B. C. ; Nalini, A. ; Sathyaprabha, T. N. ; Raju, T. R. (2011) Evidence of endoplasmic reticular stress in the spinal motor neurons exposed to CSF from sporadic amyotrophic lateral sclerosis patients Neurobiology of Disease, 41 (3). pp. 695-705. ISSN 0969-9961

Rekha, J. ; Veena, L. R. ; Prem, Neethi ; Kalaivani, P. ; Choudhury, Rupam ; Anand Alladi, Phalguni ; Agrahari, Maulishree ; Raju, T. R. ; Kutty, Bindu M. (2011) NIH-3T3 fibroblast transplants enhance host regeneration and improve spatial learning in ventral subicular lesioned rats Behavioural Brain Research, 218 (2). pp. 315-324. ISSN 0166-4328

Veena, J. ; Srikumar, B. N. ; Mahati, K. ; Raju, T. R. ; Shankaranarayana Rao, B. S. (2011) Oxotremorine treatment restores hippocampal neurogenesis and ameliorates depression-like behaviour in chronically stressed rats Psychopharmacology . ISSN 0033-3158

Kulshreshtha, Dinkar ; Vijayalakshmi, K. ; Anand Alladi, Phalguni ; Sathyaprabha, T. N. ; Nalini, Atchayaram ; Raju, T. R. (2011) Vascular endothelial growth factor attenuates neurodegenerative changes in the NSC-34 motor neuron cell line induced by cerebrospinal fluid of sporadic amyotrophic lateral sclerosis patients Neurodegenerative Diseases, 8 . pp. 322-330. ISSN 1660-2854

Anand Alladi, Phalguni ; Mahadevan, Anita ; Vijayalakshmi, K. ; Muthane, Uday ; Shankar, S. K. ; Raju, T. R. (2010) Ageing enhances α-synuclein, ubiquitin and endoplasmic reticular stress protein expression in the nigral neurons of Asian Indians Neurochemistry International, 57 (5). pp. 530-539. ISSN 0197-0186

Sankaranarayani, R. ; Nalini, A. ; Rao Laxmi, T. ; Raju, T. R. (2010) Altered neuronal activities in the motor cortex with impaired motor performance in adult rats observed after infusion of cerebrospinal fluid from amyotrophic lateral sclerosis patients Behavioural Brain Research, 206 (1). pp. 109-119. ISSN 0166-4328

Bhagya, V. ; Srikumar, B. N. ; Raju, T. R. ; Shankaranarayana Rao, B. S. (2010) Chronic escitalopram treatment restores spatial learning, monoamine levels, and hippocampal long-term potentiation in an animal model of depression Psychopharmacology, 214 (2). pp. 477-494. ISSN 0033-3158

Deepa, P. ; Shahani, Neelam ; Anand Alladi, Phalguni ; Vijayalakshmi, K. ; Sathyaprabha, T. N. ; Nalini, A. ; Ravi, V. ; Raju, T. R. (2010) Down regulation of trophic factors in neonatal rat spinal cord after administration of cerebrospinal fluid from sporadic amyotrophic lateral sclerosis patients Journal of Neural Transmission, 118 (4). pp. 531-538. ISSN 0300-9564

Shobha, K. ; Alladi, P. A. ; Nalini, A. ; Sathyaprabha, T. N. ; Raju, T. R. (2010) Exposure to CSF from sporadic amyotrophic lateral sclerosis patients induces morphological transformation of astroglia and enhances GFAP and S100β expression Neuroscience Letters, 473 (1). pp. 56-61. ISSN 0304-3940

Anand Alladi, Phalguni ; Mahadevan, Anita ; Shankar, S. K. ; Raju, T. R. ; Muthane, Uday (2010) Expression of GDNF receptors GFRα1 and RET is preserved in substantia nigra pars compacta of aging Asian Indians Journal of Chemical Neuroanatomy, 40 (1). pp. 43-52. ISSN 0891-0618

Alladi, P. A. ; Mahadevan, A. ; Yasha, T. C. ; Raju, T. R. ; Shankar, S. K. ; Muthane, U. (2009) Absence of age-related changes in nigral dopaminergic neurons of Asian Indians: relevance to lower incidence of Parkinson's disease Neuroscience, 159 (1). pp. 236-245. ISSN 0306-4522

Vijayalakshmi, K. ; Anand Alladi, Phalguni ; Sathyaprabha, T. N. ; Subramaniam, Jamuna R. ; Nalini, A. ; Raju, T. R. (2009) Cerebrospinal fluid from sporadic Amyotrophic Lateral Sclerosis patients induces degeneration of a cultured motor neuron cell line Brain Research, 1263 . pp. 122-133. ISSN 0006-8993

Veena, J. ; Srikumar, B. N. ; Mahati, K. ; Bhagya, V. ; Raju, T. R. ; Shankaranarayana Rao, B. S. (2009) Enriched environment restores hippocampal cell proliferation and ameliorates cognitive deficits in chronically stressed rats Journal of Neuroscience Research, 87 (4). pp. 831-843. ISSN 0360-4012

Gunasekaran, R. ; Sankara Narayani, R. ; Vijayalakshmi, K. ; Anand Alladi, Phalguni ; Shobha, K. ; Nalini, A. ; Sathyaprabha, T. N. ; Raju, T. R. (2009) Exposure to cerebrospinal fluid of sporadic amyotrophic lateral sclerosis patients alters Na_v1.6 and K_v1.6 channel expression in rat spinal motor neurons Brain Research, 1255 . pp. 170-179. ISSN 0006-8993

Veena, J. ; Srikumar, B. N. ; Raju, T. R. ; Shankaranarayana Rao, B. S. (2009) Exposure to enriched environment restores the survival and differentiation of new born cells in the hippocampus and ameliorates depressive symptoms in chronically stressed rats Neuroscience Letters, 455 (3). pp. 178-182. ISSN 0304-3940

Rekha, J. ; Chakravarthy, Sridhara ; Veena, L. R. ; Kalai, Vani P. ; Choudhury, Rupam ; Halahalli, Harsha N. ; Alladi, Phalguni Anand ; Dhanushkodi, Anandh ; Nirmala, M. ; Swamilingiah, Geetha M. ; Agrahari, Maulishree ; Raju, T. R. ; Panicker, M. M. ; Kutty, Bindu M. (2009) Transplantation of hippocampal cell lines restore spatial learning in rats with ventral subicular lesions Behavioral Neuroscience, 123 (6). pp. 1197-1217. ISSN 0735-7044

Sathyaprabha, T. N. ; Satishchandra, P. ; Pradhan, C. ; Sinha, S. ; Kaveri, B. ; Thennarasu, K. ; Murthy, B. T. C. ; Raju, T. R. (2008) Modulation of cardiac autonomic balance with adjuvant yoga therapy in patients with refractory epilepsy Epilepsy & Behavior, 12 (2). pp. 245-252. ISSN 1525-5050

Bhagya, V. ; Srikumar, B. N. ; Raju, T. R. ; Shankaranarayana Rao, B. S. (2008) Neonatal clomipramine induced endogenous depression in rats is associated with learning impairment in adulthood Behavioural Brain Research, 187 (1). pp. 190-194. ISSN 0166-4328

Ramkumar, K. ; Srikumar, B. N. ; Shankaranarayana Rao, B. S. ; Raju, T. R. (2008) Self-stimulation rewarding experience restores stress-induced CA3 dendritic atrophy, spatial memory deficits and alterations in the levels of neurotransmitters in the hippocampus Neurochemical Research, 33 (9). pp. 1651-1662. ISSN 0364-3190

Udupa, Kaviraja ; Sathyaprabh, T. N. ; Thirthalli, Jagadisha ; Kishore, K. R. ; Lavekar, G. S. ; Raju, T. R. ; Gangadhar, B. N. (2007) Alteration of cardiac autonomic functions in patients with major depression: a study using heart rate variability measures Journal of Affective Disorders, 100 (1). pp. 137-141. ISSN 0165-0327

Shobha, K. ; Vijayalakshmi, K. ; Anand Alladi, Phalguni ; Nalini, A. ; Sathyaprabha, T. N. ; Raju, T. R. (2007) Altered in-vitro and in-vivo expression of glial glutamate transporter-1 following exposure to cerebrospinal fluid of amyotrophic lateral sclerosis patients Journal of the Neurological Sciences, 254 (1). pp. 9-16. ISSN 0022-510X

Ramamohan, Priti Y. ; Gourie-Devi, M. ; Nalini, A. ; Shobha, K. ; Ramamohan, Y. ; Jpshi, Preethi ; Raju, T. R. (2007) Cerebrospinal fluid from amyotrophic lateral sclerosis patients causes fragmentation of the Golgi apparatus in the neonatal rat spinal cord Amyotrophic Lateral Sclerosis, 8 (2). pp. 79-82. ISSN 1748-2968

Srikumar, B. N. ; Raju, T. R. ; Shankaranarayana Rao, B. S. (2007) Contrasting effects of bromocriptine on learning of a partially baited radial arm maze task in the presence and absence of restraint stress Psychopharmacology, 193 (3). pp. 363-374. ISSN 0033-3158

Dhanushkodi, Anandh ; Bindu, B. ; Raju, T. R. ; Kutty, Bindu M. (2007) Exposure to enriched environment improves spatial learning performances and enhances cell density but not choline acetyltransferase activity in the hippocampus of ventral subicular-lesioned rats Behavioral Neuroscience, 121 (3). pp. 491-500. ISSN 0735-7044

Titus, A. D. J. ; Shankaranarayana Rao, B. S. ; Harsha, H. N. ; Ramkumar, K. ; Srikumar, B. N. ; Singh, S. B. ; Chattarji, S. ; Raju, T. R. (2007) Hypobaric hypoxia-induced dendritic atrophy of hippocampal neurons is associated with cognitive impairment in adult rats Neuroscience, 145 (1). pp. 265-278. ISSN 0306-4522

Udupa, Kaviraja ; Sathyaprabha, T. N. ; Thirthalli, Jagadisha ; Kishore, K. R. ; Raju, T. R. ; Gangadhar, B. N. (2007) Modulation of cardiac autonomic functions in patients with major depression treated with repetitive transcranial magnetic stimulation Journal of Affective Disorders, 104 (1). pp. 231-236. ISSN 0165-0327

Bindu, B. ; Alladi, P. A. ; Mansooralikhan, B. M. ; Srikumar, B. N. ; Raju, T. R. ; Kutty, B. M. (2007) Short-term exposure to an enriched environment enhances dendritic branching but not brain-derived neurotrophic factor expression in the hippocampus of rats with ventral subicular lesions Neuroscience, 144 (2). pp. 412-423. ISSN 0306-4522

Sathyaprabha, T. N. ; Satishchandra, P. ; Netravathi, K. ; Sinha, S. ; Thennarasu, K. ; Raju, T. R. (2006) Cardiac autonomic dysfunctions in chronic refractory epilepsy Epilepsy Research, 72 (1). pp. 49-56. ISSN 0920-1211

Rani, Sandhya B. ; Mahadevan, Anita ; Anilkumar, Shobha Rani ; Raju, T. R. ; Shankar, S. K. (2006) Expression of nestin - a stem cell associated intermediate filament in human CNS tumours Indian Journal of Medical Research, 124 . pp. 269-280. ISSN 0019-5340

Srikumar, B. N. ; Raju, T. R. ; Shankaranarayana Rao, B. S. (2006) The involvement of cholinergic and noradrenergic systems in behavioral recovery following oxotremorine treatment to chronically stressed rats Neuroscience, 143 (3). pp. 679-688. ISSN 0306-4522

Bhaskar, Kiran ; Momin Shareef, Mohammed ; Sharma, Vandana M. ; Pavan Kumar Shetty, A. ; Ramamohan, Y. ; Pant, Harish C. ; Raju, T. R. ; Taranath Shetty, K. (2004) Co-purification and localization of Munc18-1 (p67) and Cdk5 with neuronal cytoskeletal proteins Neurochemistry International, 44 (1). pp. 35-44. ISSN 0197-0186

Shahani, Neelam ; Gourie-Devi, M. ; Nalini, A. ; Rammohan, Priti Y. ; Shobha, K. ; Harsha, H. N. ; Raju, T. R. (2004) (−)-Deprenyl alleviates the degenerative changes induced in the neonatal rat spinal cord by CSF from amyotrophic lateral sclerosis patients Amyotrophic Lateral Sclerosis, 5 (3). pp. 172-179. ISSN 1748-2968

Sreekumaran, E. ; Ramakrishna, T. ; Madhav, T. R. ; Anandh, D. ; Prabhu, B. M. ; Sulekha, S. ; Bindu, P. N. ; Raju, T. R. (2003) Loss of dendritic connectivity in CA1, CA2, and CA3 neurons in hippocampus in rat under aluminum toxicity: antidotal effect of pyridoxine Brain Research Bulletin, 59 (6). pp. 421-427. ISSN 0361-9230

Devi, Latha ; Diwakar, Latha ; Raju, T. R. ; Kutty, Bindu M. (2003) Selective neurodegeneration of hippocampus and entorhinal cortex correlates with spatial learning impairments in rats with bilateral ibotenate lesions of ventral subiculum Brain Research, 960 (1-2). pp. 9-15. ISSN 0006-8993

Govindaiah, ; Shankaranarayana Rao, B. S. ; Raju, T. R. (2002) Enhanced metabolic activity coincides with survival and differentiation of cultured rat retinal ganglion cells exposed to glutamate Neuroscience, 113 (3). pp. 547-553. ISSN 0306-4522

Shahani, Neelam ; Gourie-Devi, M. ; Nalini, A. ; Raju, T. R. (2001) Cyclophosphamide attenuates the degenerative changes induced by CSF from patients with amyotrophic lateral sclerosis in the neonatal rat spinal cord Journal of the Neurological Sciences, 185 (2). pp. 109-118. ISSN 0022-510X

Kumar, Pratap ; Raju, T. R. (2001) Seizure susceptibility decreases with enhancement of rapid eye movement sleep Brain Research, 922 (2). pp. 299-304. ISSN 0006-8993

Sunanda, ; Shankaranarayana Rao, B. S. ; Raju, T. R. (2000) Chronic restraint stress impairs acquisition and retention of spatial memory task in rats Current Science, 79 (11). pp. 1581-1584. ISSN 0011-3891

Govindaiah, ; Shankaranarayana Rao, B. S. ; Ramamohan, Y. ; Singh, Y. K. ; Dhingra, Narender K. ; Raju, Trichur R. (2000) Cytochrome oxidase activity in rat retinal ganglion cells during postnatal development Developmental Brain Research, 124 (1-2). pp. 117-120. ISSN 0165-3806

Sunanda, ; Shankaranarayana Rao, B. S. ; Raju, T. R. (2000) Restraint stress-induced alterations in the levels of biogenic amines, amino acids, and AChE activity in the hippocampus Neurochemical Research, 25 (12). pp. 1547-1552. ISSN 0364-3190

Shankaranarayana Rao, B. S. ; Lakshmana, M. K. ; Meti, B. L. ; Raju, T. R. (1999) Chronic (−) deprenyl administration alters dendritic morphology of layer III pyramidal neurons in the prefrontal cortex of adult Bonnett monkeys Brain Research, 821 (1). pp. 218-223. ISSN 0006-8993

Shankaranarayana Rao, B. S. ; Raju, T. R. ; Meti, B. L. (1999) Increased numerical density of synapses in CA3 region of hippocampus and molecular layer of motor cortex after self-stimulation rewarding experience Neuroscience, 91 (3). pp. 799-803. ISSN 0306-4522

Shankaranarayana Rao, B. S. ; Raju, T. R. ; Meti, B. L. (1999) Self-stimulation rewarding experience induced alterations in dendritic spine density in CA3 hippocampal and layer V motor cortical pyramidal neurons Neuroscience, 89 (4). pp. 1067-1077. ISSN 0306-4522

Shankaranarayana Rao, B. S. ; Raju, T. R. ; Meti, B. L. (1998) Alterations in the density of excrescences in CA3 neurons of hippocampus in rats subjected to self-stimulation experience Brain Research, 804 (2). pp. 320-324. ISSN 0006-8993

Sunanda, ; Shankaranarayana Rao, B. S. ; Raju, T. R. (1998) Corticosterone attenuates zinc-induced neurotoxicity in primary hippocampal cultures Brain Research, 791 (1-2). pp. 295-298. ISSN 0006-8993

Yoganarasimha, D. ; Shankaranarayana Rao, B. S. ; Raju, T. R. ; Meti, B. L. (1998) Facilitation of acquisition and performance of operant and spatial learning tasks in self-stimulation experienced rats Behavioral Neuroscience, 112 (3). pp. 725-729. ISSN 0735-7044

Shankaranarayana Rao, B. S. ; Raju, T. R. ; Meti, B. L. (1998) Long-lasting structural changes in CA3 hippocampal and layer V motor cortical pyramidal neurons associated with self-stimulation rewarding experience: a quantitative Golgi study Brain Research Bulletin, 47 (1). pp. 95-101. ISSN 0361-9230

Shahani, Neelam ; Nalini, A. ; Gourie-Devi, M. ; Raju, Trichur R. (1998) Reactive astrogliosis in neonatal rat spinal cord after exposure to cerebrospinal fluid from patients with amyotrophic lateral sclerosis Experimental Neurology, 149 (1). pp. 295-298. ISSN 0014-4886

Shankaranarayana Rao, B. S. ; Raju, T. R. ; Meti, B. L. (1998) Self-stimulation of lateral hypothalamus and ventral tegmentum increases the levels of noradrenaline, dopamine, glutamate, and AChE activity, but not 5-hydroxytryptamine and GABA levels in hippocampus and motor cortex Neurochemical Research, 23 (8). pp. 1053-1059. ISSN 0364-3190

Dhingra, Narender K. ; Ramamohan, Y. ; Raju, T. R. (1997) Developmental expression of synaptophysin, synapsin I and syntaxin in the rat retina Developmental Brain Research, 102 (2). pp. 267-273. ISSN 0165-3806

Sunanda, ; Meti, B. L. ; Raju, T. R. (1997) Entorhinal cortex lesioning protects hippocampal CA3 neurons from stress-induced damage Brain Research, 770 (1-2). pp. 302-306. ISSN 0006-8993

Shelke, Rajani R. J. ; Lakshmana, Madepalli K. ; Ramamohan, Y. ; Raju, Trichur R. (1997) Levels of dopamine and noradrenaline in the developing retina - effect of light deprivation International Journal of Developmental Neuroscience, 15 (1). pp. 139-143. ISSN 0736-5748

Munirathinam, Subramani ; Rao, Muddanna S. ; Rama Mohan, Y. ; Raju, Trichur R. (1997) Regeneration of the olfactory tract following neonatal lesion in rats Experimental Neurology, 144 (1). pp. 174-182. ISSN 0014-4886

Munirathinam, Subramani ; Lakshmana, Madepalli K. ; Raju, Trichur R. (1996) (−) Deprenyl attenuates Aluminium induced neurotoxicity in Primary cortical cultures Neurodegeneration, 5 (2). pp. 161-167. ISSN 1055-8330

Sunanda, ; Rao, Muddanna S. ; Raju, T. R. (1995) Effect of chronic restraint stress on dendritic spines and excrescences of hippocampal CA3 pyramidal neurons - a quantitative study Brain Research, 694 (1-2). pp. 312-317. ISSN 0006-8993

Rao, Muddanna S. ; Devi, Gourie M. ; Nalini, A. ; Shahani, Neelam ; Raju, T. R. (1995) Neurofilament phosphorylation is increased in ventral horn neurons of neonatal rat spinal cord exposed to cerebrospinal fluid from patients with Amyotrophic Lateral Sclerosis Neurodegeneration, 4 (4). pp. 397-401. ISSN 1055-8330

Lakshmana, Madepalli K. ; Raju, Trichur R. (1994) Endosulfan induces small but significant changes in the levels of noradrenaline, dopamine and serotonin in the developing rat brain and deficits in the operant learning performance Toxicology, 91 (2). pp. 139-150. ISSN 0300-483X

Singh, J. ; Desiraju, T. ; Nagaraja, T. N. ; Raju, T. R. (1994) Facilitation of self-stimulation of ventral tegmentum by microinjection of opioid receptor subtype agonists Physiology & Behavior, 55 (4). pp. 627-631. ISSN 0031-9384

Nagaraja, T. N. ; Raju, T. R. ; Gourie-Devi, M. ; Nalini, A. (1994) Neurofilament phosphorylation is enhanced in cultured chick spinal cord neurons exposed to cerebrospinal fluid from amyotrophic lateral sclerosis patients Acta Neuropathologica, 88 (4). pp. 349-352. ISSN 0001-6322

Raju, T. R. ; Rao, Muddanna S. ; Nagaraja, T. N. ; Meti, B. L. ; Schulz, M. (1994) Retinal ganglion cell survival and neurite regeneration in vitro after cell death period are dependent upon target derived trophic factor and retinal glial factor(s) Brain Research, 664 (1-2). pp. 247-251. ISSN 0006-8993

Lakshmana, Madepalli K. ; Desiraju, Turaga ; Raju, Trichur R. (1993) Mercuric chloride-induced alterations of levels of noradrenaline, dopamine, serotonin and acetylcholine esterase activity in different regions of rat brain during postnatal development Archives of Toxicology, 67 (6). pp. 422-427. ISSN 0340-5761

Shankaranarayana Rao, B. S. ; Desiraju, T. ; Raju, T. R. (1993) Neuronal plasticity induced by self-stimulation rewarding experience in rats - a study on alteration in dendritic branching in pyramidal neurons of hippocampus and motor cortex Brain Research, 627 (2). pp. 216-224. ISSN 0006-8993

Schulz, Mark ; Raju, Trichur ; Ralston, Gregory ; Bennett, Max R. (1990) A retinal ganglion cell neurotrophic factor purified from the superior colliculus Journal of Neurochemistry, 55 (3). pp. 832-841. ISSN 0022-3042

Armson, P. F. ; Bennett, Max R. ; Raju, T. R. (1987) Retinal ganglion cell survival and neurite regeneration requirements: the change from MÜller cell dependence to superior colliculi dependence during development Developmental Brain Research, 32 (2). pp. 207-216. ISSN 0165-3806

Raju, T. R. ; Bennett, Max R. (1986) Retinal ganglion cell survival requirements: a major but transient dependence on Müller glia during development Brain Research, 383 (1-2). pp. 165-176. ISSN 0006-8993

Eagleson, K. L. ; Raju, T. R. ; Bennett, M. R. (1985) Motoneurone survival is induced by immature astrocytes from developing avian spinal cord Developmental Brain Research, 17 (1-2). pp. 95-104. ISSN 0165-3806

McCaffery, C. A. ; Raju, T. R. ; Bennett, M. R. (1985) Retinal ganglion cell survival is mediated by cell contact with immature rat astroglia Neuroscience Letters, 57 (3). pp. 319-324. ISSN 0304-3940

McCaffery, C. A. ; Raju, T. R. ; Bennett, M. R. (1984) Effects of cultured astroglia on the survival of neonatal rat retinal ganglion cells in vitro Developmental Biology, 104 (2). pp. 441-448. ISSN 0012-1606

Raju, T. R. ; Dahl, D. (1983) Localization of desmin in cultured astrocytes and its distribution in relation to glial fibrillary acidic (GFA) protein International Journal of Developmental Neuroscience, 1 (1). pp. 1-5. ISSN 0736-5748

Raju, Trichur ; Adelman, Lester S. ; Dahl, Doris ; Bignami, Amico (1983) Localization of keratin in the notochord and in notochord derived tumors - immunohistological study of rat embryo and human chordoma International Journal of Developmental Neuroscience, 1 (6). pp. 375-382. ISSN 0736-5748

Raju, T. R. ; Dahl, D. (1982) Immunofluorescence staining of cultured neurons: a comparative study using tetanus toxin and neurofilament antisera Brain Research, 248 (1). pp. 196-200. ISSN 0006-8993

Bignami, Amico ; Raju, Trichur ; Dahl, Doris (1982) Localization of vimentin, the nonspecific intermediate filament protein, in embryonal glia and in early differentiating neurons: In vivo and in vitro immunofluorescence study of the rat embryo with vimentin and neurofilament antisera Developmental Biology, 91 (2). pp. 286-295. ISSN 0012-1606

Raju, Trichur ; Bignami, Amico ; Dahl, Doris (1981) In vivo and in vitro differentiation of neurons and astrocytes in the rat embryo : immunofluorescence study with neurofilament and glial filament antisera Developmental Biology, 85 (2). pp. 344-357. ISSN 0012-1606

Raju, T. R. ; Bignami, A. ; Dahl, D. (1980) Glial fibrillary acidic protein in monolayer cultures of C-6 glioma cells: effect of aging and dibutyryl cyclic AMP Brain Research, 200 (1). pp. 225-230. ISSN 0006-8993