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Published in: Molecular Pain 1/2011

Open Access 01-12-2011 | Research

Expression of the dopaminergic D1 and D2 receptors in the anterior cingulate cortex in a model of neuropathic pain

Authors: J Manuel Ortega-Legaspi, Patricia de Gortari, René Garduño-Gutiérrez, María Isabel Amaya, Martha León-Olea, Ulises Coffeen, Francisco Pellicer

Published in: Molecular Pain | Issue 1/2011

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Abstract

Background

The anterior cingulate cortex (ACC) has been related to the affective component of pain. Dopaminergic mesocortical circuits, including the ACC, are able to inhibit neuropathic nociception measured as autotomy behaviour. We determined the changes in dopamine D1 and D2 (D1R and D2R) receptor expression in the ACC (cg1 and cg2) in an animal model of neuropathic pain. The neuropathic group had noxious heat applied in the right hind paw followed 30 min. later by right sciatic denervation. Autotomy score (AS) was recorded for eight days and subsequently classified in low, medium and high AS groups. The control consisted of naïve animals.
A semiquantitative RT-PCR procedure was done to determine mRNA levels for D1R and D2R in cg1 and cg2, and protein levels were measured by Western Blot.

Results

The results of D1R mRNA in cg1 showed a decrease in all groups. D2R mRNA levels in cg1 decreased in low AS and increased in medium and high AS. Regarding D1R in cg2, there was an increase in all groups. D2R expression levels in cg2 decreased in all groups. In cg1, the D2R mRNA correlated positively with autotomy behaviour. Protein levels of D2R in cg1 increased in all groups but to a higher degree in low AS. In cg2 D2R protein only decreased discretely. D1R protein was not found in either ACC region.

Conclusions

This is the first evidence of an increase of inhibitory dopaminergic receptor (D2R) mRNA and protein in cg1 in correlation with nociceptive behaviour in a neuropathic model of pain in the rat.
Appendix
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Literature
1.
go back to reference Abbott FV, Melzack R: Analgesia produced by stimulation of limbic structures and its relation to epileptiform after-discharges. Experimental Neurology 1978, 62: 720–734. 10.1016/0014-4886(78)90280-7PubMedCrossRef Abbott FV, Melzack R: Analgesia produced by stimulation of limbic structures and its relation to epileptiform after-discharges. Experimental Neurology 1978, 62: 720–734. 10.1016/0014-4886(78)90280-7PubMedCrossRef
2.
go back to reference Devinsky O, Morrell MJ, Vogt BA: Contributions of anterior cingulate cortex to behaviour. Brain 1995, 118: 279–306. 10.1093/brain/118.1.279PubMedCrossRef Devinsky O, Morrell MJ, Vogt BA: Contributions of anterior cingulate cortex to behaviour. Brain 1995, 118: 279–306. 10.1093/brain/118.1.279PubMedCrossRef
3.
go back to reference Rainville P, Duncan GH, Price DD, Carrier B, Bushnell MC: Pain affect encoded in human anterior cingulate but not somatosensory cortex. Science 1997, 277: 968–971. 10.1126/science.277.5328.968PubMedCrossRef Rainville P, Duncan GH, Price DD, Carrier B, Bushnell MC: Pain affect encoded in human anterior cingulate but not somatosensory cortex. Science 1997, 277: 968–971. 10.1126/science.277.5328.968PubMedCrossRef
4.
go back to reference Peyron R, Faillenot I, Mertens P, Laurent B, Garcia-Larrea L: Motor cortex stimulation in neuropathic pain. Correlations between analgesic effect and hemodynamic changes in the brain. A PET study. Neuroimage 2007, 34: 310–321. 10.1016/j.neuroimage.2006.08.037PubMedCrossRef Peyron R, Faillenot I, Mertens P, Laurent B, Garcia-Larrea L: Motor cortex stimulation in neuropathic pain. Correlations between analgesic effect and hemodynamic changes in the brain. A PET study. Neuroimage 2007, 34: 310–321. 10.1016/j.neuroimage.2006.08.037PubMedCrossRef
5.
go back to reference Tuor UI, Malisza K, Foniok T, Papadimitropoulos R, Jarmasz M, Somorjai R, Kozlowski P: Functional magnetic resonance imaging in rats subjected to intense electrical and noxious chemical stimulation of the forepaw. Pain 2000, 87: 315–324. 10.1016/S0304-3959(00)00293-1PubMedCrossRef Tuor UI, Malisza K, Foniok T, Papadimitropoulos R, Jarmasz M, Somorjai R, Kozlowski P: Functional magnetic resonance imaging in rats subjected to intense electrical and noxious chemical stimulation of the forepaw. Pain 2000, 87: 315–324. 10.1016/S0304-3959(00)00293-1PubMedCrossRef
6.
go back to reference Zhao F, Welsh D, Williams M, Coimbra A, Urban MO, Hargreaves R, Evelhoch J, Williams DS: fMRI of pain processing in the brain: A within-animal comparative study of BOLD vs. CBV and noxious electrical vs. noxious mechanical stimulation in rat. Neuroimage 2011,59(2):1168–79.PubMedCrossRef Zhao F, Welsh D, Williams M, Coimbra A, Urban MO, Hargreaves R, Evelhoch J, Williams DS: fMRI of pain processing in the brain: A within-animal comparative study of BOLD vs. CBV and noxious electrical vs. noxious mechanical stimulation in rat. Neuroimage 2011,59(2):1168–79.PubMedCrossRef
8.
go back to reference Johansen JP, Fields HL, Manning BH: The affective component of pain in rodents: direct evidence for a contribution of the anterior cingulate cortex. Proc Natl Acad Sci USA 2001, 98: 8077–8082. 10.1073/pnas.141218998PubMedCentralPubMedCrossRef Johansen JP, Fields HL, Manning BH: The affective component of pain in rodents: direct evidence for a contribution of the anterior cingulate cortex. Proc Natl Acad Sci USA 2001, 98: 8077–8082. 10.1073/pnas.141218998PubMedCentralPubMedCrossRef
9.
go back to reference Vogt BA, Derbyshire S, Jones AK: Pain processing in four regions of human cingulate cortex localized with co-registered PET and MR imaging. Eur J Neurosci 1996, 8: 1461–1473. 10.1111/j.1460-9568.1996.tb01608.xPubMedCrossRef Vogt BA, Derbyshire S, Jones AK: Pain processing in four regions of human cingulate cortex localized with co-registered PET and MR imaging. Eur J Neurosci 1996, 8: 1461–1473. 10.1111/j.1460-9568.1996.tb01608.xPubMedCrossRef
10.
go back to reference Vogt BA, Finch DM, Olson CR: Functional heterogeneity in cingulate cortex: the anterior executive and posterior evaluative regions. Cereb Cortex 1992, 5: 435–443. Vogt BA, Finch DM, Olson CR: Functional heterogeneity in cingulate cortex: the anterior executive and posterior evaluative regions. Cereb Cortex 1992, 5: 435–443.
11.
go back to reference Sotres-Bayon F, Torres-Lopez E, Lopez-Avila A, del Angel R, Pellicer F: Lesion and electrical stimulation of the ventral tegmental area modify persistent nociceptive behavior in the rat. Brain Res 2001, 898: 342–349. 10.1016/S0006-8993(01)02213-2PubMedCrossRef Sotres-Bayon F, Torres-Lopez E, Lopez-Avila A, del Angel R, Pellicer F: Lesion and electrical stimulation of the ventral tegmental area modify persistent nociceptive behavior in the rat. Brain Res 2001, 898: 342–349. 10.1016/S0006-8993(01)02213-2PubMedCrossRef
12.
go back to reference Jasmin L, Burkey AR, Granato A, Ohara PT: Rostral agranular insular cortex and pain areas of the central nervous system: a tract-tracing study in the rat. J Comp Neurol 2004, 468: 425–440. 10.1002/cne.10978PubMedCrossRef Jasmin L, Burkey AR, Granato A, Ohara PT: Rostral agranular insular cortex and pain areas of the central nervous system: a tract-tracing study in the rat. J Comp Neurol 2004, 468: 425–440. 10.1002/cne.10978PubMedCrossRef
13.
go back to reference Hsu MM, Shyu BC: Electrophysiological study of the connection between medial thalamus and anterior cingulate cortex in the rat. Neuroreport 1997, 8: 2701–2707. 10.1097/00001756-199708180-00013PubMedCrossRef Hsu MM, Shyu BC: Electrophysiological study of the connection between medial thalamus and anterior cingulate cortex in the rat. Neuroreport 1997, 8: 2701–2707. 10.1097/00001756-199708180-00013PubMedCrossRef
14.
go back to reference Lopez-Avila A, Coffeen U, Ortega-Legaspi JM, del Angel R, Pellicer F: Dopamine and NMDA systems modulate long-term nociception in the rat anterior cingulate cortex. Pain 2004, 111: 136–143. 10.1016/j.pain.2004.06.010PubMedCrossRef Lopez-Avila A, Coffeen U, Ortega-Legaspi JM, del Angel R, Pellicer F: Dopamine and NMDA systems modulate long-term nociception in the rat anterior cingulate cortex. Pain 2004, 111: 136–143. 10.1016/j.pain.2004.06.010PubMedCrossRef
15.
go back to reference Gordon I, Weizman R, Rehavi M: Modulatory effect of agents active in the presynaptic dopaminergic system on the striatal dopamine transporter. Eur J Pharmacol 1996, 298: 27–30. 10.1016/0014-2999(95)00770-9PubMedCrossRef Gordon I, Weizman R, Rehavi M: Modulatory effect of agents active in the presynaptic dopaminergic system on the striatal dopamine transporter. Eur J Pharmacol 1996, 298: 27–30. 10.1016/0014-2999(95)00770-9PubMedCrossRef
16.
go back to reference Pellicer F, Ortega-Legaspi J, López_Avila A, Coffeen U: Dopamine Pathways and Receptors in Nociception and Pain. In Pharmacology of Pain. IASP Press; 2010. Pellicer F, Ortega-Legaspi J, López_Avila A, Coffeen U: Dopamine Pathways and Receptors in Nociception and Pain. In Pharmacology of Pain. IASP Press; 2010.
17.
go back to reference Coffeen U, Lopez-Avila A, Pellicer F: Systemic amantadine diminishes inflammatory and neuropathic nociception in the rat. Salud Mental 2009, 32: 139–144. Coffeen U, Lopez-Avila A, Pellicer F: Systemic amantadine diminishes inflammatory and neuropathic nociception in the rat. Salud Mental 2009, 32: 139–144.
18.
go back to reference Coffeen U, Lopez-Avila A, Ortega-Legaspi JM, del Angel R, Lopez-Munoz FJ, Pellicer F: Dopamine receptors in the anterior insular cortex modulate long-term nociception in the rat. Eur J Pain 2008, 12: 535–543. 10.1016/j.ejpain.2007.08.008PubMedCrossRef Coffeen U, Lopez-Avila A, Ortega-Legaspi JM, del Angel R, Lopez-Munoz FJ, Pellicer F: Dopamine receptors in the anterior insular cortex modulate long-term nociception in the rat. Eur J Pain 2008, 12: 535–543. 10.1016/j.ejpain.2007.08.008PubMedCrossRef
19.
go back to reference Saade NE, Atweh SF, Bahuth NB, Jabbur SJ: Augmentation of nociceptive reflexes and chronic deafferentation pain by chemical lesions of either dopaminergic terminals or midbrain dopaminergic neurons. Brain Res 1997, 751: 1–12. 10.1016/S0006-8993(96)01164-XPubMedCrossRef Saade NE, Atweh SF, Bahuth NB, Jabbur SJ: Augmentation of nociceptive reflexes and chronic deafferentation pain by chemical lesions of either dopaminergic terminals or midbrain dopaminergic neurons. Brain Res 1997, 751: 1–12. 10.1016/S0006-8993(96)01164-XPubMedCrossRef
20.
go back to reference Saade NE, Jabbur SJ: Nociceptive behavior in animal models for peripheral neuropathy: spinal and supraspinal mechanisms. Prog Neurobiol 2008, 86: 22–47. 10.1016/j.pneurobio.2008.06.002PubMedCrossRef Saade NE, Jabbur SJ: Nociceptive behavior in animal models for peripheral neuropathy: spinal and supraspinal mechanisms. Prog Neurobiol 2008, 86: 22–47. 10.1016/j.pneurobio.2008.06.002PubMedCrossRef
21.
go back to reference Coffeen U, Manuel Ortega-Legaspi J, Lopez-Munoz FJ, Simon-Arceo K, Jaimes O, Pellicer F: Insular cortex lesion diminishes neuropathic and inflammatory pain-like behaviours. Eur J Pain 2011, 15: 132–138. 10.1016/j.ejpain.2010.06.007PubMedCrossRef Coffeen U, Manuel Ortega-Legaspi J, Lopez-Munoz FJ, Simon-Arceo K, Jaimes O, Pellicer F: Insular cortex lesion diminishes neuropathic and inflammatory pain-like behaviours. Eur J Pain 2011, 15: 132–138. 10.1016/j.ejpain.2010.06.007PubMedCrossRef
22.
go back to reference Coderre TJ, Grimes RW, Melzack R: Deafferentation and chronic pain in animals: an evaluation of evidence suggesting autotomy is related to pain. Pain 1986, 26: 61–84. 10.1016/0304-3959(86)90174-0PubMedCrossRef Coderre TJ, Grimes RW, Melzack R: Deafferentation and chronic pain in animals: an evaluation of evidence suggesting autotomy is related to pain. Pain 1986, 26: 61–84. 10.1016/0304-3959(86)90174-0PubMedCrossRef
23.
go back to reference Wall PD, Devor M, Inbal R, Scadding JW, Schonfeld D, Seltzer Z, Tomkiewicz MM: Autotomy following peripheral nerve lesions: experimental anaesthesia dolorosa. Pain 1979, 7: 103–111. 10.1016/0304-3959(79)90002-2PubMedCrossRef Wall PD, Devor M, Inbal R, Scadding JW, Schonfeld D, Seltzer Z, Tomkiewicz MM: Autotomy following peripheral nerve lesions: experimental anaesthesia dolorosa. Pain 1979, 7: 103–111. 10.1016/0304-3959(79)90002-2PubMedCrossRef
24.
go back to reference Ziv-Sefer S, Raber P, Barbash S, Devor M: Unity vs. diversity of neuropathic pain mechanisms: Allodynia and hyperalgesia in rats selected for heritable predisposition to spontaneous pain. Pain 2009, 146: 148–157. 10.1016/j.pain.2009.07.020PubMedCrossRef Ziv-Sefer S, Raber P, Barbash S, Devor M: Unity vs. diversity of neuropathic pain mechanisms: Allodynia and hyperalgesia in rats selected for heritable predisposition to spontaneous pain. Pain 2009, 146: 148–157. 10.1016/j.pain.2009.07.020PubMedCrossRef
25.
go back to reference Wood PB: Role of central dopamine in pain and analgesia. Expert Rev Neurother 2008, 8: 781–797. 10.1586/14737175.8.5.781PubMedCrossRef Wood PB: Role of central dopamine in pain and analgesia. Expert Rev Neurother 2008, 8: 781–797. 10.1586/14737175.8.5.781PubMedCrossRef
26.
go back to reference Peyron R, Laurent B, Garcia-Larrea L: Functional imaging of brain responses to pain. A review and meta-analysis (2000). Neurophysiol Clin 2000, 30: 263–288. 10.1016/S0987-7053(00)00227-6PubMedCrossRef Peyron R, Laurent B, Garcia-Larrea L: Functional imaging of brain responses to pain. A review and meta-analysis (2000). Neurophysiol Clin 2000, 30: 263–288. 10.1016/S0987-7053(00)00227-6PubMedCrossRef
27.
go back to reference Ainsworth K, Smith SE, Zetterstrom TS, Pei Q, Franklin M, Sharp T: Effect of antidepressant drugs on dopamine D1 and D2 receptor expression and dopamine release in the nucleus accumbens of the rat. Psychopharmacology (Berl) 1998, 140: 470–477. 10.1007/s002130050791CrossRef Ainsworth K, Smith SE, Zetterstrom TS, Pei Q, Franklin M, Sharp T: Effect of antidepressant drugs on dopamine D1 and D2 receptor expression and dopamine release in the nucleus accumbens of the rat. Psychopharmacology (Berl) 1998, 140: 470–477. 10.1007/s002130050791CrossRef
28.
go back to reference Tropea D, Capsoni S, Tongiorgi E, Giannotta S, Cattaneo A, Domenici L: Mismatch between BDNF mRNA and protein expression in the developing visual cortex: the role of visual experience. Eur J Neurosci 2001, 13: 709–721. 10.1046/j.0953-816x.2000.01436.xPubMedCrossRef Tropea D, Capsoni S, Tongiorgi E, Giannotta S, Cattaneo A, Domenici L: Mismatch between BDNF mRNA and protein expression in the developing visual cortex: the role of visual experience. Eur J Neurosci 2001, 13: 709–721. 10.1046/j.0953-816x.2000.01436.xPubMedCrossRef
29.
go back to reference Mogil JS, Wilson SG, Bon K, Lee SE, Chung K, Raber P, Pieper JO, Hain HS, Belknap JK, Hubert L, et al.: Heritability of nociception I: responses of 11 inbred mouse strains on 12 measures of nociception. Pain 1999, 80: 67–82. 10.1016/S0304-3959(98)00197-3PubMedCrossRef Mogil JS, Wilson SG, Bon K, Lee SE, Chung K, Raber P, Pieper JO, Hain HS, Belknap JK, Hubert L, et al.: Heritability of nociception I: responses of 11 inbred mouse strains on 12 measures of nociception. Pain 1999, 80: 67–82. 10.1016/S0304-3959(98)00197-3PubMedCrossRef
30.
go back to reference Devor M, del Canho S, Raber P: Heritability of symptoms in the neuroma model of neuropathic pain: replication and complementation analysis. Pain 2005, 116: 294–301. 10.1016/j.pain.2005.04.025PubMedCrossRef Devor M, del Canho S, Raber P: Heritability of symptoms in the neuroma model of neuropathic pain: replication and complementation analysis. Pain 2005, 116: 294–301. 10.1016/j.pain.2005.04.025PubMedCrossRef
31.
go back to reference Ortega-Legaspi JM, Lopez-Avila A, Coffeen U, del Angel R, Pellicer F: Scopolamine into the anterior cingulate cortex diminishes nociception in a neuropathic pain model in the rat: an interruption of 'nociception-related memory acquisition'? Eur J Pain 2003, 7: 425–429. 10.1016/S1090-3801(02)00147-7PubMedCrossRef Ortega-Legaspi JM, Lopez-Avila A, Coffeen U, del Angel R, Pellicer F: Scopolamine into the anterior cingulate cortex diminishes nociception in a neuropathic pain model in the rat: an interruption of 'nociception-related memory acquisition'? Eur J Pain 2003, 7: 425–429. 10.1016/S1090-3801(02)00147-7PubMedCrossRef
32.
go back to reference Sheng HY, Qu CL, Huo FQ, Du JQ, Tang JS: D2-like but not D1-like dopamine receptors are involved in the ventrolateral orbital cortex-induced antinociception: a GABAergic modulation mechanism. Exp Neurol 2009, 215: 128–134. 10.1016/j.expneurol.2008.09.018PubMedCrossRef Sheng HY, Qu CL, Huo FQ, Du JQ, Tang JS: D2-like but not D1-like dopamine receptors are involved in the ventrolateral orbital cortex-induced antinociception: a GABAergic modulation mechanism. Exp Neurol 2009, 215: 128–134. 10.1016/j.expneurol.2008.09.018PubMedCrossRef
33.
go back to reference Taylor BK, Joshi C, Uppal H: Stimulation of dopamine D2 receptors in the nucleus accumbens inhibits inflammatory pain. Brain Res 2003, 987: 135–143. 10.1016/S0006-8993(03)03318-3PubMedCrossRef Taylor BK, Joshi C, Uppal H: Stimulation of dopamine D2 receptors in the nucleus accumbens inhibits inflammatory pain. Brain Res 2003, 987: 135–143. 10.1016/S0006-8993(03)03318-3PubMedCrossRef
34.
go back to reference Koyanagi S, Himukashi S, Mukaida K, Shichino T, Fukuda K: Dopamine D2-like receptor in the nucleus accumbens is involved in the antinociceptive effect of nitrous oxide. Anesth Analg 2008, 106: 1904–1909. 10.1213/ane.0b013e318172b15bPubMedCrossRef Koyanagi S, Himukashi S, Mukaida K, Shichino T, Fukuda K: Dopamine D2-like receptor in the nucleus accumbens is involved in the antinociceptive effect of nitrous oxide. Anesth Analg 2008, 106: 1904–1909. 10.1213/ane.0b013e318172b15bPubMedCrossRef
35.
go back to reference Magnusson JE, Fisher K: The involvement of dopamine in nociception: the role of D(1) and D(2) receptors in the dorsolateral striatum. Brain Res 2000, 855: 260–266. 10.1016/S0006-8993(99)02396-3PubMedCrossRef Magnusson JE, Fisher K: The involvement of dopamine in nociception: the role of D(1) and D(2) receptors in the dorsolateral striatum. Brain Res 2000, 855: 260–266. 10.1016/S0006-8993(99)02396-3PubMedCrossRef
37.
go back to reference Fu Y, Han J, Ishola T, Scerbo M, Adwanikar H, Ramsey C, Neugebauer V: PKA and ERK, but not PKC, in the amygdala contribute to pain-related synaptic plasticity and behavior. Mol Pain 2008, 4: 26. 10.1186/1744-8069-4-26PubMedCentralPubMedCrossRef Fu Y, Han J, Ishola T, Scerbo M, Adwanikar H, Ramsey C, Neugebauer V: PKA and ERK, but not PKC, in the amygdala contribute to pain-related synaptic plasticity and behavior. Mol Pain 2008, 4: 26. 10.1186/1744-8069-4-26PubMedCentralPubMedCrossRef
38.
go back to reference Wang H, Wu LJ, Kim SS, Lee FJ, Gong B, Toyoda H, Ren M, Shang YZ, Xu H, Liu F, et al.: FMRP acts as a key messenger for dopamine modulation in the forebrain. Neuron 2008, 59: 634–647. 10.1016/j.neuron.2008.06.027PubMedCrossRef Wang H, Wu LJ, Kim SS, Lee FJ, Gong B, Toyoda H, Ren M, Shang YZ, Xu H, Liu F, et al.: FMRP acts as a key messenger for dopamine modulation in the forebrain. Neuron 2008, 59: 634–647. 10.1016/j.neuron.2008.06.027PubMedCrossRef
39.
go back to reference Ortega-Legaspi JM, Leon-Olea M, de Gortari P, Amaya MI, Coffeen U, Simon-Arceo K, Pellicer F: Expression of muscarinic M1 and M2 receptors in the anterior cingulate cortex associated with neuropathic pain. Eur J Pain 2010, 14: 901–910. 10.1016/j.ejpain.2010.02.007PubMedCrossRef Ortega-Legaspi JM, Leon-Olea M, de Gortari P, Amaya MI, Coffeen U, Simon-Arceo K, Pellicer F: Expression of muscarinic M1 and M2 receptors in the anterior cingulate cortex associated with neuropathic pain. Eur J Pain 2010, 14: 901–910. 10.1016/j.ejpain.2010.02.007PubMedCrossRef
40.
go back to reference Coffeen U, Ortega-Legaspi JM, de Gortari P, Simon-Arceo K, Jaimes O, Amaya MI, Pellicer F: Inflammatory nociception diminishes dopamine release and increases dopamine D2 receptor mRNA in the rat's insular cortex. Mol Pain 2010, 6: 75. 10.1186/1744-8069-6-75PubMedCentralPubMedCrossRef Coffeen U, Ortega-Legaspi JM, de Gortari P, Simon-Arceo K, Jaimes O, Amaya MI, Pellicer F: Inflammatory nociception diminishes dopamine release and increases dopamine D2 receptor mRNA in the rat's insular cortex. Mol Pain 2010, 6: 75. 10.1186/1744-8069-6-75PubMedCentralPubMedCrossRef
41.
go back to reference Thanos PK, Michaelides M, Umegaki H, Volkow ND: D2R DNA transfer into the nucleus accumbens attenuates cocaine self-administration in rats. Synapse 2008, 62: 481–486. 10.1002/syn.20523PubMedCentralPubMedCrossRef Thanos PK, Michaelides M, Umegaki H, Volkow ND: D2R DNA transfer into the nucleus accumbens attenuates cocaine self-administration in rats. Synapse 2008, 62: 481–486. 10.1002/syn.20523PubMedCentralPubMedCrossRef
42.
go back to reference Thanos PK, Volkow ND, Freimuth P, Umegaki H, Ikari H, Roth G, Ingram DK, Hitzemann R: Overexpression of dopamine D2 receptors reduces alcohol self-administration. J Neurochem 2001, 78: 1094–1103. 10.1046/j.1471-4159.2001.00492.xPubMedCrossRef Thanos PK, Volkow ND, Freimuth P, Umegaki H, Ikari H, Roth G, Ingram DK, Hitzemann R: Overexpression of dopamine D2 receptors reduces alcohol self-administration. J Neurochem 2001, 78: 1094–1103. 10.1046/j.1471-4159.2001.00492.xPubMedCrossRef
43.
go back to reference Zimmermann M: Ethical guidelines for investigations of experimental pain in conscious animals. Pain 1983, 16: 109–110. 10.1016/0304-3959(83)90201-4PubMedCrossRef Zimmermann M: Ethical guidelines for investigations of experimental pain in conscious animals. Pain 1983, 16: 109–110. 10.1016/0304-3959(83)90201-4PubMedCrossRef
44.
go back to reference Coderre TJ, Melzack R: Procedures which increase acute pain sensitivity also increase autotomy. Experimental Neurology 1986, 92: 713–722. 10.1016/0014-4886(86)90311-0PubMedCrossRef Coderre TJ, Melzack R: Procedures which increase acute pain sensitivity also increase autotomy. Experimental Neurology 1986, 92: 713–722. 10.1016/0014-4886(86)90311-0PubMedCrossRef
45.
go back to reference Paxinos G, Watson C: The Rat Brain in Stereotaxic Coordinates. 4th edition. London: Academic Press; 1998. Paxinos G, Watson C: The Rat Brain in Stereotaxic Coordinates. 4th edition. London: Academic Press; 1998.
46.
go back to reference Chomczynski P, Sacchi N: Single-step method of RNA isolation by acid guanidinium thiocyanate-phenol-chloroform extraction. Anal Biochem 1987, 162: 156–159.PubMedCrossRef Chomczynski P, Sacchi N: Single-step method of RNA isolation by acid guanidinium thiocyanate-phenol-chloroform extraction. Anal Biochem 1987, 162: 156–159.PubMedCrossRef
47.
go back to reference Jaimes-Hoy L, Joseph-Bravo P, de Gortari P: Differential response of TRHergic neurons of the hypothalamic paraventricular nucleus (PVN) in female animals submitted to food-restriction or dehydration-induced anorexia and cold exposure. Horm Behav 2008, 53: 366–377. 10.1016/j.yhbeh.2007.11.003PubMedCrossRef Jaimes-Hoy L, Joseph-Bravo P, de Gortari P: Differential response of TRHergic neurons of the hypothalamic paraventricular nucleus (PVN) in female animals submitted to food-restriction or dehydration-induced anorexia and cold exposure. Horm Behav 2008, 53: 366–377. 10.1016/j.yhbeh.2007.11.003PubMedCrossRef
48.
go back to reference de Gortari P, Mancera K, Cote-Velez A, Amaya MI, Martinez A, Jaimes-Hoy L, Joseph-Bravo P: Involvement of CRH-R2 receptor in eating behavior and in the response of the HPT axis in rats subjected to dehydration-induced anorexia. Psychoneuroendocrinology 2009, 34: 259–272. 10.1016/j.psyneuen.2008.09.010PubMedCrossRef de Gortari P, Mancera K, Cote-Velez A, Amaya MI, Martinez A, Jaimes-Hoy L, Joseph-Bravo P: Involvement of CRH-R2 receptor in eating behavior and in the response of the HPT axis in rats subjected to dehydration-induced anorexia. Psychoneuroendocrinology 2009, 34: 259–272. 10.1016/j.psyneuen.2008.09.010PubMedCrossRef
Metadata
Title
Expression of the dopaminergic D1 and D2 receptors in the anterior cingulate cortex in a model of neuropathic pain
Authors
J Manuel Ortega-Legaspi
Patricia de Gortari
René Garduño-Gutiérrez
María Isabel Amaya
Martha León-Olea
Ulises Coffeen
Francisco Pellicer
Publication date
01-12-2011
Publisher
BioMed Central
Published in
Molecular Pain / Issue 1/2011
Electronic ISSN: 1744-8069
DOI
https://doi.org/10.1186/1744-8069-7-97

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