0000000000605971

AUTHOR

Sarah J. Morgan

showing 2 related works from this author

Arrestin-β-1 Physically Scaffolds TSH and IGF1 Receptors to Enable Crosstalk

2019

Endogenously expressed TSH receptors (TSHRs) on orbital fibroblasts of patients with Graves ophthalmopathy (GO) use crosstalk with IGF1 receptors (IGF1R) to synergistically stimulate secretion of hyaluronan (HA), a major component of GO pathology. We previously showed crosstalk occurred upstream of mitogen-activated protein kinase (ERK) phosphorylation. Because other G protein-coupled receptors engage arrestin-β-1 (ARRB1) and ERK, we tested whether ARRB1 was a necessary component of TSHR/IGF1R crosstalk. HA secretion was stimulated by the TSHR-stimulating monoclonal antibodies M22 and KSAb1, or immunoglobulins from patients with GO (GO-Igs). Treatment with M22, as previously shown, resulted…

0301 basic medicineMAPK/ERK pathwaymedicine.medical_specialty030209 endocrinology & metabolismStimulationReceptor tyrosine kinaseCell LineReceptor IGF Type 103 medical and health sciencesMice0302 clinical medicineEndocrinologyInternal medicinemedicineArrestinAnimalsHumansPhosphorylationProtein kinase AReceptorResearch ArticlesbiologyChemistryReceptors Thyrotropinbody regionsGraves OphthalmopathyCrosstalk (biology)030104 developmental biologyEndocrinologybeta-Arrestin 1Thyroid Epithelial CellsGene Knockdown Techniquesbiology.proteinPhosphorylationSignal Transduction
researchProduct

TSH/IGF-1 Receptor Cross-Talk Rapidly Activates Extracellular Signal-Regulated Kinases in Multiple Cell Types

2017

We previously showed that thyrotropin (TSH)/insulinlike growth factor (IGF)-1 receptor cross-talk appears to be involved in Graves’ orbitopathy (GO) pathogenesis and upregulation of thyroid-specific genes in human thyrocytes. In orbital fibroblasts from GO patients, coadministration of TSH and IGF-1 induces synergistic increases in hyaluronan secretion. In human thyrocytes, TSH plus IGF-1 synergistically increased expression of the sodium-iodide symporter that appeared to involve ERK1/2 activation. However, the details of ERK1/2 activation were not known, nor was whether ERK1/2 was involved in this synergism in other cell types. Using primary cultures of GO fibroblasts (GOFs) and human thyr…

0301 basic medicinemedicine.medical_specialtyCell typeendocrine systemendocrine system diseasesMAP Kinase Signaling SystemThyrotropinPertussis toxinReceptor IGF Type 103 medical and health sciencesEndocrinologyDownregulation and upregulationInternal medicinemedicineHumansSecretionHyaluronic AcidInsulin-Like Growth Factor IPhosphorylationReceptorResearch ArticlesMitogen-Activated Protein Kinase 1Mitogen-Activated Protein Kinase 3SymportersChemistryHEK 293 cellsReceptors ThyrotropinReceptor Cross-TalkFibroblastsSignalingGraves Ophthalmopathy030104 developmental biologyEndocrinologyHEK293 CellsThyroid Epithelial CellsSymporterPhosphorylationhormones hormone substitutes and hormone antagonistsEndocrinology
researchProduct