Commonly Used Anesthesia/Euthanasia Methods for Brain Collection Differentially Impact MAPK Activity in Male and Female C57BL/6 Mice
The mitogen-activated protein kinases (MAPKs) are a family of protein kinases that regulate crucial neuronal functions such as neuronal differentiation, proliferation, and apoptosis through phosphorylation of subsequent protein kinases. The three classical MAPK subfamilies, extracellular signal-regu...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2019-03-01
|
| Series: | Frontiers in Cellular Neuroscience |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/article/10.3389/fncel.2019.00096/full |
| _version_ | 1818016571504721920 |
|---|---|
| author | Mee Jung Ko Mee Jung Ko Mee Jung Ko Grace E. Mulia Richard M. van Rijn Richard M. van Rijn Richard M. van Rijn |
| author_facet | Mee Jung Ko Mee Jung Ko Mee Jung Ko Grace E. Mulia Richard M. van Rijn Richard M. van Rijn Richard M. van Rijn |
| author_sort | Mee Jung Ko |
| collection | DOAJ |
| description | The mitogen-activated protein kinases (MAPKs) are a family of protein kinases that regulate crucial neuronal functions such as neuronal differentiation, proliferation, and apoptosis through phosphorylation of subsequent protein kinases. The three classical MAPK subfamilies, extracellular signal-regulated kinase 1 and 2 (ERK1/2), c-Jun N-terminal kinase (JNK), and p38 kinase have been linked to various neurological disorders often in conjunction with activation of a wide range of G protein-coupled receptors and receptor tyrosine kinases. Many studies investigating MAPK function in these disorders rely on histochemistry or immunoblotting that require brain isolation following euthanasia. Here, we evaluated to what degree different modes of anesthesia/euthanasia impact MAPK activity in adult male and female C57BL/6 mice. Mice were decapitated following ketamine/xylazine or isoflurane anesthesia, carbon dioxide asphyxiation, or without anesthesia. We selectively chose five brain regions (the prefrontal cortex, the dorsal hippocampus, the dorsal striatum, the nucleus accumbens, and the amygdala) that are heavily implicated in neuropsychiatric disorders. We found that relative to carbon dioxide asphyxiation, the other methods displayed significantly stronger ERK1/2 phosphorylation in select brain regions of male and female mice, with no pronounced sex difference. A similar, yet, less pronounced trend was observed for JNK activity, whereas the choice of euthanasia method did not differentially impact p38 phosphorylation. Our study results reveal how small differences in experimental design may impact whether one will be able to detect drug- or disease-related changes in MAPK activity. These findings are timely in a period where experimental rigor is emphasized to increase reproducibility of research. |
| first_indexed | 2024-04-14T07:15:22Z |
| format | Article |
| id | doaj.art-f8a81f677b9e4c04905dfb3756403f6d |
| institution | Directory Open Access Journal |
| issn | 1662-5102 |
| language | English |
| last_indexed | 2024-04-14T07:15:22Z |
| publishDate | 2019-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Cellular Neuroscience |
| spelling | doaj.art-f8a81f677b9e4c04905dfb3756403f6d2022-12-22T02:06:20ZengFrontiers Media S.A.Frontiers in Cellular Neuroscience1662-51022019-03-011310.3389/fncel.2019.00096428820Commonly Used Anesthesia/Euthanasia Methods for Brain Collection Differentially Impact MAPK Activity in Male and Female C57BL/6 MiceMee Jung Ko0Mee Jung Ko1Mee Jung Ko2Grace E. Mulia3Richard M. van Rijn4Richard M. van Rijn5Richard M. van Rijn6Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, IN, United StatesPurdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, IN, United StatesPurdue Interdisciplinary Life Sciences Graduate Program, Purdue University, West Lafayette, IN, United StatesDepartment of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, IN, United StatesDepartment of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, IN, United StatesPurdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, IN, United StatesPurdue Interdisciplinary Life Sciences Graduate Program, Purdue University, West Lafayette, IN, United StatesThe mitogen-activated protein kinases (MAPKs) are a family of protein kinases that regulate crucial neuronal functions such as neuronal differentiation, proliferation, and apoptosis through phosphorylation of subsequent protein kinases. The three classical MAPK subfamilies, extracellular signal-regulated kinase 1 and 2 (ERK1/2), c-Jun N-terminal kinase (JNK), and p38 kinase have been linked to various neurological disorders often in conjunction with activation of a wide range of G protein-coupled receptors and receptor tyrosine kinases. Many studies investigating MAPK function in these disorders rely on histochemistry or immunoblotting that require brain isolation following euthanasia. Here, we evaluated to what degree different modes of anesthesia/euthanasia impact MAPK activity in adult male and female C57BL/6 mice. Mice were decapitated following ketamine/xylazine or isoflurane anesthesia, carbon dioxide asphyxiation, or without anesthesia. We selectively chose five brain regions (the prefrontal cortex, the dorsal hippocampus, the dorsal striatum, the nucleus accumbens, and the amygdala) that are heavily implicated in neuropsychiatric disorders. We found that relative to carbon dioxide asphyxiation, the other methods displayed significantly stronger ERK1/2 phosphorylation in select brain regions of male and female mice, with no pronounced sex difference. A similar, yet, less pronounced trend was observed for JNK activity, whereas the choice of euthanasia method did not differentially impact p38 phosphorylation. Our study results reveal how small differences in experimental design may impact whether one will be able to detect drug- or disease-related changes in MAPK activity. These findings are timely in a period where experimental rigor is emphasized to increase reproducibility of research.https://www.frontiersin.org/article/10.3389/fncel.2019.00096/fullERKJNKp38ketamineisofluranecarbon dioxide |
| spellingShingle | Mee Jung Ko Mee Jung Ko Mee Jung Ko Grace E. Mulia Richard M. van Rijn Richard M. van Rijn Richard M. van Rijn Commonly Used Anesthesia/Euthanasia Methods for Brain Collection Differentially Impact MAPK Activity in Male and Female C57BL/6 Mice Frontiers in Cellular Neuroscience ERK JNK p38 ketamine isoflurane carbon dioxide |
| title | Commonly Used Anesthesia/Euthanasia Methods for Brain Collection Differentially Impact MAPK Activity in Male and Female C57BL/6 Mice |
| title_full | Commonly Used Anesthesia/Euthanasia Methods for Brain Collection Differentially Impact MAPK Activity in Male and Female C57BL/6 Mice |
| title_fullStr | Commonly Used Anesthesia/Euthanasia Methods for Brain Collection Differentially Impact MAPK Activity in Male and Female C57BL/6 Mice |
| title_full_unstemmed | Commonly Used Anesthesia/Euthanasia Methods for Brain Collection Differentially Impact MAPK Activity in Male and Female C57BL/6 Mice |
| title_short | Commonly Used Anesthesia/Euthanasia Methods for Brain Collection Differentially Impact MAPK Activity in Male and Female C57BL/6 Mice |
| title_sort | commonly used anesthesia euthanasia methods for brain collection differentially impact mapk activity in male and female c57bl 6 mice |
| topic | ERK JNK p38 ketamine isoflurane carbon dioxide |
| url | https://www.frontiersin.org/article/10.3389/fncel.2019.00096/full |
| work_keys_str_mv | AT meejungko commonlyusedanesthesiaeuthanasiamethodsforbraincollectiondifferentiallyimpactmapkactivityinmaleandfemalec57bl6mice AT meejungko commonlyusedanesthesiaeuthanasiamethodsforbraincollectiondifferentiallyimpactmapkactivityinmaleandfemalec57bl6mice AT meejungko commonlyusedanesthesiaeuthanasiamethodsforbraincollectiondifferentiallyimpactmapkactivityinmaleandfemalec57bl6mice AT graceemulia commonlyusedanesthesiaeuthanasiamethodsforbraincollectiondifferentiallyimpactmapkactivityinmaleandfemalec57bl6mice AT richardmvanrijn commonlyusedanesthesiaeuthanasiamethodsforbraincollectiondifferentiallyimpactmapkactivityinmaleandfemalec57bl6mice AT richardmvanrijn commonlyusedanesthesiaeuthanasiamethodsforbraincollectiondifferentiallyimpactmapkactivityinmaleandfemalec57bl6mice AT richardmvanrijn commonlyusedanesthesiaeuthanasiamethodsforbraincollectiondifferentiallyimpactmapkactivityinmaleandfemalec57bl6mice |