Transcranial Calcium Macro‐Imaging From the Auditory Cortex of Thy1‐Cre‐Driven GCaMP8 Transgenic Rats
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Wiley
2026
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| author | Manavu Tohmi Hisaaki Namba Meiko Kawamura Ryuichi Hishida Shota Iguchi Kazuto Kobayashi Natsuki Matsushita Tomoji Mashimo Rie Natsume Kenji Sakimura Hiroyuki Nawa |
| author_facet | Manavu Tohmi Hisaaki Namba Meiko Kawamura Ryuichi Hishida Shota Iguchi Kazuto Kobayashi Natsuki Matsushita Tomoji Mashimo Rie Natsume Kenji Sakimura Hiroyuki Nawa Manavu Tohmi Hisaaki Namba Meiko Kawamura Ryuichi Hishida Shota Iguchi Kazuto Kobayashi Natsuki Matsushita Tomoji Mashimo Rie Natsume Kenji Sakimura Hiroyuki Nawa |
| collection | Wiley Open Access |
| contents | Transcranial Calcium Macro‐Imaging From the Auditory Cortex of Thy1‐Cre‐Driven GCaMP8 Transgenic Rats Manavu Tohmi Hisaaki Namba Meiko Kawamura Ryuichi Hishida Shota Iguchi Kazuto Kobayashi Natsuki Matsushita Tomoji Mashimo Rie Natsume Kenji Sakimura Hiroyuki Nawa Neuropsychopharmacology Reports ABSTRACT Background Genetically encoded calcium indicators such as GCaMP enable us to monitor neuronal activities from living animals at synaptic levels as well as at whole‐brain levels. However, the genetic variation of GCaMP transgenic rats is limited compared with the various demands for neuroscience studies on rats. Method We established two transgenic rat lines: one expressing Cre recombinase under the control of the Thy1 promoter and another knock‐in line carrying a floxed STOP cassette followed by GCaMP8 inserted into the β‐actin locus. We mated these two transgenic rats and produced the Thy1‐Cre‐driven GCaMP8‐expressing rats. Results Approximately 80% of cortical neurons were positive for the GCaMP immunoreactivity. The GCaMP8‐expressing rats were subjected to transcranial calcium imaging from the auditory cortex under anesthesia. With this simple procedure, we were able to detect the maximum responses to 68 dB click sounds;ΔF/F 0 = 1.2%. The rise time reaching the peak response was approximately 150 ms, and the half decay time was about 150 ms. Conclusions These results suggest that the present GCaMP8‐expressing rats as well as their parental transgenic rat strains offer a new tool for cortical macro‐imaging and functional mapping with the transcranial approach. 10.1002/npr2.70113 http://creativecommons.org/licenses/by/4.0/ |
| doi_str_mv | 10.1002/npr2.70113 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_npr2_70113 |
| institution | Wiley Open Access |
| license_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| publishDate | 2026 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Transcranial Calcium Macro‐Imaging From the Auditory Cortex of Thy1‐Cre‐Driven GCaMP8 Transgenic Rats Manavu Tohmi Hisaaki Namba Meiko Kawamura Ryuichi Hishida Shota Iguchi Kazuto Kobayashi Natsuki Matsushita Tomoji Mashimo Rie Natsume Kenji Sakimura Hiroyuki Nawa Neuropsychopharmacology Reports Transcranial Calcium Macro‐Imaging From the Auditory Cortex of Thy1‐Cre‐Driven GCaMP8 Transgenic Rats Manavu Tohmi Hisaaki Namba Meiko Kawamura Ryuichi Hishida Shota Iguchi Kazuto Kobayashi Natsuki Matsushita Tomoji Mashimo Rie Natsume Kenji Sakimura Hiroyuki Nawa Neuropsychopharmacology Reports ABSTRACT Background Genetically encoded calcium indicators such as GCaMP enable us to monitor neuronal activities from living animals at synaptic levels as well as at whole‐brain levels. However, the genetic variation of GCaMP transgenic rats is limited compared with the various demands for neuroscience studies on rats. Method We established two transgenic rat lines: one expressing Cre recombinase under the control of the Thy1 promoter and another knock‐in line carrying a floxed STOP cassette followed by GCaMP8 inserted into the β‐actin locus. We mated these two transgenic rats and produced the Thy1‐Cre‐driven GCaMP8‐expressing rats. Results Approximately 80% of cortical neurons were positive for the GCaMP immunoreactivity. The GCaMP8‐expressing rats were subjected to transcranial calcium imaging from the auditory cortex under anesthesia. With this simple procedure, we were able to detect the maximum responses to 68 dB click sounds;ΔF/F 0 = 1.2%. The rise time reaching the peak response was approximately 150 ms, and the half decay time was about 150 ms. Conclusions These results suggest that the present GCaMP8‐expressing rats as well as their parental transgenic rat strains offer a new tool for cortical macro‐imaging and functional mapping with the transcranial approach. 10.1002/npr2.70113 http://creativecommons.org/licenses/by/4.0/ |
| title | Transcranial Calcium Macro‐Imaging From the Auditory Cortex of Thy1‐Cre‐Driven GCaMP8 Transgenic Rats |
| topic | Neuropsychopharmacology Reports |
| url | https://onlinelibrary.wiley.com/doi/10.1002/npr2.70113 |