title: Nutrient-dependent increased dendritic arborization of somatosensory neurons.
abstract: Suboptimal nutrition imposes developmental constraints on infant animals, which marshal adaptive responses to eventually become mature adults. Such responses are mounted at multiple levels from systemic to cellular. At the cellular level, the underlying mechanisms of cell proliferation control have been intensively studied. However, less is known about how growth of postmitotic and morphologically complex cells, such as neurons, is controlled by nutritional status. We address this question using Class I and Class IV dendritic arborization neurons in Drosophila larvae. Class IV neurons have been shown to sense nociceptive thermal, mechanical and light stimuli, whereas Class I neurons are proprioceptors. We reared larvae on diets with different protein and carbohydrate content throughout larval stages and examined how morphologies of Class I or Class IV neurons were affected. Dendritic arbors of Class IV neurons became more complex when larvae were reared on a low-yeast diet, which contains lower amounts of amino acids and other ingredients, compared to a high-yeast diet. In contrast, such low-yeast-dependent hyperarborization was not seen in Class I neurons. The physiological and metabolic implications of the hyperarborization phenotype are discussed in relation to a recent hypothesis that Class IV neurons sense protein-deficient stress and to our characterization of how the dietary yeast contents impacted larval metabolism.
authors.affiliation: Graduate School of Biostudies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Kaori
authors.initials: K
authors.lastname: Watanabe
authors.affiliation: Graduate School of Biostudies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Furumizo
authors.affiliation: Graduate School of Biostudies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Tadao
authors.initials: T
authors.lastname: Usui
authors.affiliation: Graduate School of Biostudies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Yukako
authors.initials: Y
authors.lastname: Hattori
authors.affiliation: Graduate School of Biostudies, Kyoto University, Kyoto, 606-8501, Japan.
authors.forename: Tadashi
authors.identifier: http://orcid.org/0000-0001-7204-3606
authors.initials: T
authors.lastname: Uemura
mesh_terms: D000818:Animals; D002241:Carbohydrates / Q000008:administration & dosage; D049109:Cell Proliferation / Q000235:genetics; D003712:Dendrites / Q000235:genetics* / Q000378:metabolism; D004331:Drosophila melanogaster / Q000235:genetics* / Q000254:growth & development; D007814:Larva / Q000235:genetics* / Q000254:growth & development; D009473:Neuronal Plasticity; D009474:Neurons / Q000145:classification / Q000378:metabolism*; D009752:Nutritional Status / Q000235:genetics; D011506:Proteins / Q000008:administration & dosage; D011984:Sensory Receptor Cells / Q000378:metabolism
chemical_list: D002241:Carbohydrates; D011506:Proteins