Whole-brain input mapping of the lateral versus medial anterodorsal bed nucleus of the stria terminalis in the mouse

Yanjun Sun; Larry S. Zweifel; Todd C. Holmes; Xiangmin Xu

Neurobiology of Stress (Mar 2023)

Whole-brain input mapping of the lateral versus medial anterodorsal bed nucleus of the stria terminalis in the mouse

Yanjun Sun,
Larry S. Zweifel,
Todd C. Holmes,
Xiangmin Xu

Affiliations

Yanjun Sun: Department of Anatomy and Neurobiology, School of Medicine, University of California, Irvine, CA, 92697-1275, USA
Larry S. Zweifel: Department of Psychiatry and Behavioral Sciences and Department of Pharmacology, University of Washington, Seattle, WA, 98195, USA
Todd C. Holmes: Department of Physiology and Biophysics, School of Medicine, University of California, Irvine, CA, 92697-4560, USA; Center for Neural Circuit Mapping, University of California, Irvine, CA, 92697-1275, USA
Xiangmin Xu: Department of Anatomy and Neurobiology, School of Medicine, University of California, Irvine, CA, 92697-1275, USA; Department of Biomedical Engineering, University of California, Irvine, CA, 92697-2715, USA; Department of Microbiology and Molecular Genetics, School of Medicine, University of California, Irvine, CA, 92697-2715, USA; Department of Computer Science, University of California, Irvine, CA, 92697-3435, USA; Center for Neural Circuit Mapping, University of California, Irvine, CA, 92697-1275, USA; Corresponding author. Department of Anatomy and Neurobiology, School of Medicine, University of California, Irvine, CA, 92697-1275, USA.

Journal volume & issue: Vol. 23
p. 100527

Abstract

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The anterior portion of the bed nucleus of the stria terminalis (BNST) modulates fear and stress responses. The anterodorsal BNST (adBNST) can be anatomically subdivided further into the lateral and medial divisions. Although output projections of BNST subregions have been studied, the local and global input connections to these subregions remain poorly understood. To further understand BNST-centered circuit operations, we have applied new viral-genetic tracing and functional circuit mapping to determine detailed synaptic circuit inputs to lateral and medial subregions of adBNST in the mouse. Monosynaptic canine adenovirus type 2 (CAV2) and rabies virus-based retrograde tracers were injected in the adBNST subregions. The amygdalar complex, hypothalamus and hippocampal formation account for the majority of overall inputs to adBNST. However, lateral versus medial adBNST subregions have distinct patterns of long-range cortical and limbic brain inputs. The lateral adBNST has more input connections from prefrontal (prelimbic, infralimbic, cingulate) and insular cortices, anterior thalamus and ectorhinal/perirhinal cortices. In contrast, the medial adBNST received biased inputs from the medial amygdala, lateral septum, hypothalamus nuclei and ventral subiculum. We confirmed long-range functional inputs from the amydalohippocampal area and basolateral amygdala to the adBNST using ChR2-assisted circuit mapping. Selected novel BNST inputs are also validated with the AAV axonal tracing data from the Allen Institute Mouse Brain Connectivity Atlas. Together, these results provide a comprehensive map of the differential afferent inputs to lateral and medial adBNST subregions, and offer new insight into the functional operations of BNST circuitry for stress and anxiety-related behaviors.

Published in Neurobiology of Stress

ISSN: 2352-2895 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Medicine: Internal medicine: Neurosciences. Biological psychiatry. Neuropsychiatry: Neurology. Diseases of the nervous system; Science: Physiology: Neurophysiology and neuropsychology
Website: http://www.journals.elsevier.com/neurobiology-of-stress/

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