Wilson R Adams, Ana I Borrachero-Conejo, Pratheepa Kumari Rasiah, Emanuella Saracino, Roberto Zamboni, Eric Duco Jansen, Valentina Benfenati, Anita Mahadevan-Jansen
{"title":"基于激光脉冲参数的红外神经刺激诱导星形胶质细胞不同的分子通路。","authors":"Wilson R Adams, Ana I Borrachero-Conejo, Pratheepa Kumari Rasiah, Emanuella Saracino, Roberto Zamboni, Eric Duco Jansen, Valentina Benfenati, Anita Mahadevan-Jansen","doi":"10.1002/adbi.202500269","DOIUrl":null,"url":null,"abstract":"<p><p>Label-free optical stimulation of brain cells with infrared (IR) light provides a powerful tool for spatially targeted neuromodulation. However, lingering questions about the off-target effects of IR stimulation on non-neuronal cells remain sparsely explored. It is shown that rat astroglial cultures are independently sensitive to single pulses of infrared light, evoking calcium signaling and osmoregulatory phenomena in vitro. Recent studies highlight that astrocytes respond differently to electromagnetic and laser stimulation, recruiting different pathways. The impact of three different IR stimulation time courses on astrocyte calcium and water transport dynamics is explored with widefield fluorescence microscopy and pharmacology to fill this gap. Results show that different stimulation methods can evoke astrocyte calcium responses, resulting from distinct biomolecular signaling processes. Notably, swelling and shrinkage are also differently evoked by short-term and long-term stimulation pulses. It is shown that specific IR stimulation can drive selective water and calcium dynamics in astrocytes. The work uniquely reports label-free optical modulation techniques to drive astroglial homeostatic machinery, a crucial process in healthy brain function that lacks tools for spatially precise modulation. More broadly, the results demonstrate the need to consider off-target effects with neuromodulation strategies and how to use such effects to study brain physiology.</p>","PeriodicalId":7234,"journal":{"name":"Advanced biology","volume":" ","pages":"e00269"},"PeriodicalIF":2.6000,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Infrared Neural Stimulation Elicits Distinct Molecular Pathways in Astrocytes Based on Laser Pulse Parameters.\",\"authors\":\"Wilson R Adams, Ana I Borrachero-Conejo, Pratheepa Kumari Rasiah, Emanuella Saracino, Roberto Zamboni, Eric Duco Jansen, Valentina Benfenati, Anita Mahadevan-Jansen\",\"doi\":\"10.1002/adbi.202500269\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Label-free optical stimulation of brain cells with infrared (IR) light provides a powerful tool for spatially targeted neuromodulation. However, lingering questions about the off-target effects of IR stimulation on non-neuronal cells remain sparsely explored. It is shown that rat astroglial cultures are independently sensitive to single pulses of infrared light, evoking calcium signaling and osmoregulatory phenomena in vitro. Recent studies highlight that astrocytes respond differently to electromagnetic and laser stimulation, recruiting different pathways. The impact of three different IR stimulation time courses on astrocyte calcium and water transport dynamics is explored with widefield fluorescence microscopy and pharmacology to fill this gap. Results show that different stimulation methods can evoke astrocyte calcium responses, resulting from distinct biomolecular signaling processes. Notably, swelling and shrinkage are also differently evoked by short-term and long-term stimulation pulses. It is shown that specific IR stimulation can drive selective water and calcium dynamics in astrocytes. The work uniquely reports label-free optical modulation techniques to drive astroglial homeostatic machinery, a crucial process in healthy brain function that lacks tools for spatially precise modulation. More broadly, the results demonstrate the need to consider off-target effects with neuromodulation strategies and how to use such effects to study brain physiology.</p>\",\"PeriodicalId\":7234,\"journal\":{\"name\":\"Advanced biology\",\"volume\":\" \",\"pages\":\"e00269\"},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2025-08-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced biology\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1002/adbi.202500269\",\"RegionNum\":3,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, BIOMATERIALS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced biology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1002/adbi.202500269","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, BIOMATERIALS","Score":null,"Total":0}
Infrared Neural Stimulation Elicits Distinct Molecular Pathways in Astrocytes Based on Laser Pulse Parameters.
Label-free optical stimulation of brain cells with infrared (IR) light provides a powerful tool for spatially targeted neuromodulation. However, lingering questions about the off-target effects of IR stimulation on non-neuronal cells remain sparsely explored. It is shown that rat astroglial cultures are independently sensitive to single pulses of infrared light, evoking calcium signaling and osmoregulatory phenomena in vitro. Recent studies highlight that astrocytes respond differently to electromagnetic and laser stimulation, recruiting different pathways. The impact of three different IR stimulation time courses on astrocyte calcium and water transport dynamics is explored with widefield fluorescence microscopy and pharmacology to fill this gap. Results show that different stimulation methods can evoke astrocyte calcium responses, resulting from distinct biomolecular signaling processes. Notably, swelling and shrinkage are also differently evoked by short-term and long-term stimulation pulses. It is shown that specific IR stimulation can drive selective water and calcium dynamics in astrocytes. The work uniquely reports label-free optical modulation techniques to drive astroglial homeostatic machinery, a crucial process in healthy brain function that lacks tools for spatially precise modulation. More broadly, the results demonstrate the need to consider off-target effects with neuromodulation strategies and how to use such effects to study brain physiology.