Cited by 52Genetics, Aging, and Longevity in Model OrganismsNeuroscience and Neuropharmacology ResearchNeurobiology and Insect Physiology Research

Dlx5 and Dlx6 expression in GABAergic neurons controls behavior, metabolism, healthy aging and lifespan

Open access
de Lombares, Camille, Heude, Eglantine, Alfama, Gladys, Fontaine, Anastasia, Hassouna, Rim, Vernochet, Cécile, de Chaumont, Fabrice, Olivo-Marin, Christophe +7 more·2019·Aging

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Abstract

ABSTRACT Dlx5 and Dlx6 encode two homeobox transcription factors expressed by developing and mature GABAergic interneurons. During development Dlx5/6 are important for the differentiation of Parvalbumin ( Pvalb )-expressing neurons. Perinatal lethality of homozygous mice in which Dlx5/6 have been constitutively deleted has, so far, hindered the study of the function of these genes in adult neurons. We first show that Dlx5 and Dlx6 are expressed by all subclasses of adult cortical GABAergic neurons. Then we analyse Vgat ΔDlx5-6 mice in which Dlx5 and Dlx6 are simultaneously inactivated in all GABAergic interneurons. Vgat ΔDlx5-6 mice present a behavioral pattern suggesting reduction of anxiety and obsessive-compulsive activities. They rapidly access and spend more time in the central region of an open field, bury few marbles in the marble burying test and show little interest in nest building. Male and female 20-month-old Vgat ΔDlx5-6 animals have the same size as their normal littermates, but present a 25% body weight reduction associated with a marked decline in white and brown adipose tissue. Remarkably, both Vgat ΔDlx5-6/+ and Vgat ΔDlx5-6 mice present a 33% longer median survival than their control littermates. Hallmarks of biological aging such as motility, adipose deposition and coat conditions are improved in mutant animals. Our data imply that GABAergic interneurons can regulate mammalian healthspan and lifespan through Dlx5/6 -dependent mechanisms. Understanding these regulations can be an entry point to unravel the processes through which the brain affects body homeostasis and, ultimately, longevity and healthy aging. SIGNIFICANCE STATEMENT Dlx5 and Dlx6 are transcription factors controlling several developmental processes, including GABAergic neuronal migration and differentiation. To study their function in adult brain, we selectively inactivated both genes in GABAergic interneurons ( Vgat ΔDlx5-6 mice). Mutant mice have reduced anxiety-like and obsessive-compulsive behaviors. Interestingly, Vgat ΔDlx5-6 mice have a 25% body weight reduction and about 70% less white and brown adipose tissue; their general health status is excellent. Vgat ΔDlx5-6 mice have a median survival about 33% longer than their control littermates and hallmarks of biological aging are improved. Dlx5/6-dependent regulations in GABAergic neurons could be an entry point to understand how the brain determines the psychophysiological status of the body and, ultimately, longevity and healthy aging.

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Crossref · 10.18632/aging.102141

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  • Social behavior between individuals of the same genotype was very variable, resulting in no significant difference in sociability between control, Dlx5/6VgatCre/+ and Dlx5/6VgatCre mice.

    “Social behavior between individuals of the same genotype was very variable, resulting in no significant difference in sociability between control, Dlx5/6VgatCre/+ and Dlx5/6VgatCre mice (de Lombares, et al. 2019).”

    From <i>DLX5/6</i> GABAergic Expression Affects Social Vocalization: Implications for Human Evolution (2021) · cites this paper as de Lombares, et al. 2019

    The Results section, “Sociability tests” (page unavailable), reports no significant difference between control, heterozygous and homozygous mutant mice in one sociability test, and no difference between genotypes in a second test. It does not say that behavior varied greatly among mice of the same genotype or that such variability caused the lack of a significant difference. (LLM, conf=0.86)

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  • Targeted inactivation of Dlx5/6 in mouse GABAergic neurons results in behavioral and metabolic phenotypes including a 33% increase in lifespan.

    “Targeted inactivation of Dlx5/6 in mouse GABAergic neurons (Dlx5/6VgatCre mice) results in behavioral and metabolic phenotypes notably increasing lifespan by 33%.”
  • Underrepresentation of DLX5/6-N-Haplotype in semi-supercentenarians suggests an association between DLX5/6 brain expression and healthy aging.

    “suggesting an association between DLX5/6 brain expression and healthy aging reminiscent of what has been shown in mouse models (de Lombares, et al. 2019).”
  • The underrepresentation of DLX5/6-N-Haplotype in semi-supercentenarians could be related to the 33% lifespan extension described for Dlx5/6VgatCre mice, suggesting that the DLX5/6-N-Haplotype could regulate DLX5/6 neuronal expression.

    “This observation could be related to the 33% lifespan extension described for Dlx5/6VgatCre mice, suggesting that the DLX5/6-N-Haplotype could regulate DLX5/6 neuronal expression (de Lombares, et al. 2019).”

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Authors
de Lombares, C., Heude, E., Alfama, G., Fontaine, A., Hassouna, R., Vernochet, C., de Chaumont, F., Olivo-Marin, C., Ey, E., Parnaudeau, S., Tronche, F., Bourgeron, T., Luquet, S., Levi, G., & Narboux-Nême, N.
Affiliations
  • Physiologie Moléculaire et Adaptation, CNRS UMR7221, Muséum National d’Histoire Naturelle, Département AVIV, Paris, France
  • Centre National de la Recherche Scientifique (FR)
  • BioImage Analysis Unit, Institut Pasteur, CNRS UMR 3691, Paris, France
Corresponding author
Levi, Giovanni
Venue
Aging
Published
2019-09-12
Volume
11
Issue
17
Pages
6638-6656
ISSN
1945-4589 (ISSN-L)
OpenAlex
W2972886985
Cited by
52
References
85
Citations by year
2026: 3 · 2025: 9 · 2024: 13 · 2023: 6 · 2022: 7 · 2021: 9 · 2020: 5
FWCI
1.91
Type
journal article
Language
en
Open access
Locations
  • Aging (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by)
  • HAL (submittedVersion)
Funders
Agence Nationale de la Recherche (ANR-17-CE37-0007, ANR-17-CE14-0024)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
Keywords
Dlx5, Dlx6, GABAergic neurons, lifespan, healthy aging, metabolism, behavior, longevity
MeSH terms
Healthy Aging, Animals, Behavior, Animal, Interneurons, Longevity, Homeodomain Proteins, Mice, GABAergic Neurons

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