Nocardia otitidiscaviarum (GAM-5) induces parkinsonian-like alterations in mouse
Parkinson's disease, a major neurodegenerative disorder in humans whose etiology is unknown, may be associated with some environmental factors. Nocardia otitidiscaviarum (GAM-5) isolated from a patient with an actinomycetoma produced signs similar to Parkinson's disease following iv inject...
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| Format: | Article |
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Associação Brasileira de Divulgação Científica
2004-04-01
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| Series: | Brazilian Journal of Medical and Biological Research |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000400011 |
| _version_ | 1818494700529647616 |
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| author | F.J. Díaz-Corrales C. Colasante Q. Contreras M. Puig J.A. Serrano L. Hernández B.L. Beaman |
| author_facet | F.J. Díaz-Corrales C. Colasante Q. Contreras M. Puig J.A. Serrano L. Hernández B.L. Beaman |
| author_sort | F.J. Díaz-Corrales |
| collection | DOAJ |
| description | Parkinson's disease, a major neurodegenerative disorder in humans whose etiology is unknown, may be associated with some environmental factors. Nocardia otitidiscaviarum (GAM-5) isolated from a patient with an actinomycetoma produced signs similar to Parkinson's disease following iv injection into NMRI mice. NMRI mice were infected intravenously with a non-lethal dose of 5 x 10(6) colony forming units of N. otitidiscaviarum (GAM-5). Fourteen days after bacterial infection, most of the 60 mice injected exhibited parkinsonian features characterized by vertical head tremor, akinesia/bradykinesia, flexed posture and postural instability. There was a peak of nocardial growth in the brain during the first 24 h followed by a decrease, so that by 14 days nocardiae could no longer be cultured. At 24 h after infection, Gram staining showed nocardiae in neurons in the substantia nigra and occasionally in the brain parenchyma in the frontal and parietal cortex. At 21 days post-infection, tyrosine hydroxylase immunolabeling showed a 58% reduction of tyrosine hydroxylase in the substantia nigra, and a 35% reduction of tyrosine hydroxylase in the ventral tegmental region. Dopamine levels were reduced from 110 ± 32.5 to 58 ± 16.5 ng/mg protein (47.2% reduction) in brain from infected mice exhibiting impaired movements, whereas serotonin levels were unchanged (191 ± 44 protein in control and 175 ± 39 ng/mg protein in injected mice). At later times, intraneuronal inclusion bodies were observed in the substantia nigra. Our observations emphasize the need for further studies of the potential association between Parkinson's disease or parkinsonism-like disease and exposure to various nocardial species. |
| first_indexed | 2024-12-10T18:09:58Z |
| format | Article |
| id | doaj.art-95ce1b4efc76429b9fe513f57f57c90c |
| institution | Directory Open Access Journal |
| issn | 0100-879X 1414-431X |
| language | English |
| last_indexed | 2024-12-10T18:09:58Z |
| publishDate | 2004-04-01 |
| publisher | Associação Brasileira de Divulgação Científica |
| record_format | Article |
| series | Brazilian Journal of Medical and Biological Research |
| spelling | doaj.art-95ce1b4efc76429b9fe513f57f57c90c2022-12-22T01:38:28ZengAssociação Brasileira de Divulgação CientíficaBrazilian Journal of Medical and Biological Research0100-879X1414-431X2004-04-0137453954810.1590/S0100-879X2004000400011Nocardia otitidiscaviarum (GAM-5) induces parkinsonian-like alterations in mouseF.J. Díaz-CorralesC. ColasanteQ. ContrerasM. PuigJ.A. SerranoL. HernándezB.L. BeamanParkinson's disease, a major neurodegenerative disorder in humans whose etiology is unknown, may be associated with some environmental factors. Nocardia otitidiscaviarum (GAM-5) isolated from a patient with an actinomycetoma produced signs similar to Parkinson's disease following iv injection into NMRI mice. NMRI mice were infected intravenously with a non-lethal dose of 5 x 10(6) colony forming units of N. otitidiscaviarum (GAM-5). Fourteen days after bacterial infection, most of the 60 mice injected exhibited parkinsonian features characterized by vertical head tremor, akinesia/bradykinesia, flexed posture and postural instability. There was a peak of nocardial growth in the brain during the first 24 h followed by a decrease, so that by 14 days nocardiae could no longer be cultured. At 24 h after infection, Gram staining showed nocardiae in neurons in the substantia nigra and occasionally in the brain parenchyma in the frontal and parietal cortex. At 21 days post-infection, tyrosine hydroxylase immunolabeling showed a 58% reduction of tyrosine hydroxylase in the substantia nigra, and a 35% reduction of tyrosine hydroxylase in the ventral tegmental region. Dopamine levels were reduced from 110 ± 32.5 to 58 ± 16.5 ng/mg protein (47.2% reduction) in brain from infected mice exhibiting impaired movements, whereas serotonin levels were unchanged (191 ± 44 protein in control and 175 ± 39 ng/mg protein in injected mice). At later times, intraneuronal inclusion bodies were observed in the substantia nigra. Our observations emphasize the need for further studies of the potential association between Parkinson's disease or parkinsonism-like disease and exposure to various nocardial species.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000400011Nocardia otitidiscaviarum (GAM-5)Parkinson's diseaseSubstantia nigraBradykinesiaDopamineTyrosine hydroxylase |
| spellingShingle | F.J. Díaz-Corrales C. Colasante Q. Contreras M. Puig J.A. Serrano L. Hernández B.L. Beaman Nocardia otitidiscaviarum (GAM-5) induces parkinsonian-like alterations in mouse Brazilian Journal of Medical and Biological Research Nocardia otitidiscaviarum (GAM-5) Parkinson's disease Substantia nigra Bradykinesia Dopamine Tyrosine hydroxylase |
| title | Nocardia otitidiscaviarum (GAM-5) induces parkinsonian-like alterations in mouse |
| title_full | Nocardia otitidiscaviarum (GAM-5) induces parkinsonian-like alterations in mouse |
| title_fullStr | Nocardia otitidiscaviarum (GAM-5) induces parkinsonian-like alterations in mouse |
| title_full_unstemmed | Nocardia otitidiscaviarum (GAM-5) induces parkinsonian-like alterations in mouse |
| title_short | Nocardia otitidiscaviarum (GAM-5) induces parkinsonian-like alterations in mouse |
| title_sort | nocardia otitidiscaviarum gam 5 induces parkinsonian like alterations in mouse |
| topic | Nocardia otitidiscaviarum (GAM-5) Parkinson's disease Substantia nigra Bradykinesia Dopamine Tyrosine hydroxylase |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000400011 |
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