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James Truman's research has used moths and fruit flies to study how hormones influence nervous system development and function. One area focused on the ecdysis behavior used by molting insects to shed their old exoskeleton and expand their new one. Work from his and other labs showed that the coincidence of behavioral and developmental conditions initiates a temporal program of neuropeptide release within the CNS and into the blood. The different peptides evoke specific behavioral components of the ecdysis sequence and insure that the behaviors are coordinated with ongoing physiology. A second area examines how the developmental hormones, ecdysone and juvenile hormone, direct the transformation of the larval nervous system into that of the adult. These studies have revealed how hormones coordinate neuronal remodeling, neurogenesis and programmed cell death. The neurogenesis studies revealed a modular, functional organization of the ventral nerve cord of the fruit fly. Each module includes a neuronal stem cell and its progeny. The modules are organized in a hierarchical fashion, forming the computational machinery controlling walking and flight. Homologous modules are present in other insects and provide an avenue to understand the evolution of behavioral diversity in the insects. The last research area concerns the endocrine mechanisms that have facilitated the evolution of insect metamorphosis.
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Geoffrey W Meissner, Allison Vannan,Jennifer Jeter, Kari Close,Gina M DePasquale,Zachary Dorman, Kaitlyn Forster, Jaye Anne Beringer,Theresa V Gibney,Joanna H Hausenfluck,Yisheng He, Kristin Henderson,
biorxiv(2024)
Julius Jonaitis, Karen L Hibbard, Kaity McCafferty Layte, Atsuki Hiramoto,Albert Cardona,James W Truman, Akinao Nose, Maarten F Zwart, Stefan R Pulver
bioRxiv : the preprint server for biology (2024)
bioRxiv (Cold Spring Harbor Laboratory) (2023)
bioRxiv (Cold Spring Harbor Laboratory) (2023)
crossref(2022)
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