Evidence map›Paper›PMID 42802576›Full record

ArticleAnnals of medicine2026

MERTK-related engulfment of norepinephrinergic neuronal presynaptic membrane by astrocytes following acute TBI and potentiation effect of peripheral nerve modulation.

Xixian Liao, Ming Li, Fei Niu, Zilong Zhao, Jun Hong, Yu Deng, Yu Yan, Chuanhang He, Yanhao Liao, Ruilin Li and 2 more

Abstract read
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Article in Annals of medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

12 authors.

Xixian LiaoDepartment of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.ORCID 0000-0002-0543-6132
Ming LiDepartment of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
Fei NiuBeijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China.
Zilong ZhaoTianjin Institute of Neurology, Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.
Jun HongDepartment of Neurosurgery, Tangshan Gongren Hospital, Hebei Medical University, Tangshan, China.
Yu DengDepartment of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
Yu YanDepartment of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
Chuanhang HeDepartment of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
Yanhao LiaoDepartment of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
Ruilin LiDepartment of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
Yuan ZhuangDepartment of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
Guoyi GaoDepartment of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.ORCID 0000-0003-2090-8369

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe study investigated the locus coeruleus (LC) changes after acute traumatic brain injury (TBI) and the effects of peripheral nerve modulation (PNM) in a mouse model.

methodsWe performed closed controlled impact to simulate TBI in mice. We adopted electrical stimulation of the right median nerve as a method of PNM. Low-frequency and high-frequency peripheral nerve modulation (LF-PNM and HF-PNM) were administered on the 1st, 2nd, and 3rd days after the injury. We conducted a cell interaction analysis on the single-cell data of the mouse brainstem from the previous stage. Meanwhile, we also performed arousal and stress behavioral tests, immunofluorescence staining for apoptosis and activation of LC norepinephrinergic neurons, and examination of astrocytic phagocytosis in association with MERTK expression.

resultsAcute TBI induced apoptosis of LC norepinephrinergic neurons alongside behavioral impairments. TBI triggered reactive astrogliosis in the LC, with elevated GFAP-Lamp2 colocalization. Increased GFAP-NET colocalization indicated astrocytic engulfment of presynaptic membrane proteins from norepinephrinergic neurons. Cell interaction analysis identified MERTK-mediated astrocyte-norepinephrinergic neuron crosstalk; GFAP-MERTK immunofluorescence confirmed spatially increased astrocytic MERTK expression linked to NET phagocytosis. LF-PNM further enhanced astrocytic phagocytosis of LC norepinephrinergic presynaptic proteins after TBI, reduced neuronal apoptosis, facilitated neuronal activation, and rescued arousal and stress functions.

conclusionAfter acute TBI, LC astrocytes phagocytose norepinephrinergic presynaptic proteins

Indexed as

AstrocytesBrain Injuries, TraumaticLocus CoeruleusNeuronsPeripheral NervesAnimalsApoptosisDisease Models, AnimalElectric StimulationMaleMiceMice, Inbred C57BLNorepinephrinePhagocytosisReceptor Protein-Tyrosine KinasesNorepinephrineReceptor Protein-Tyrosine KinasesAstrocyteslocus coeruleusphagocytosisright median nerve stimulationtraumatic brain injury

Identifiers

PMID42802576
PMCPMC13629777

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