TY  - JOUR
AU  - Galgóczi, Erika
AU  - Katkó, Mónika
AU  - Papp, Fruzsina Réka
AU  - Csiki, Róbert
AU  - Bak-Csiha, Sára
AU  - Erdei, Annamária
AU  - Bodor, Miklós
AU  - Ujhelyi, Bernadett
AU  - Steiber, Zita
AU  - Győry, Ferenc
AU  - Nagy, Endre
TI  - Glucocorticoids Directly Affect Hyaluronan Production of Orbital Fibroblasts; A Potential Pleiotropic Effect in Graves’ Orbitopathy
JF  - MOLECULES
J2  - MOLECULES
VL  - 28
PY  - 2023
IS  - 1
SN  - 1420-3049
DO  - 10.3390/molecules28010015
UR  - https://m2.mtmt.hu/api/publication/33578444
ID  - 33578444
AB  - Orbital connective tissue expansion is a hallmark of Graves’ orbitopathy (GO). In moderate-to-severe active GO, glucocorticoids (GC) are the first line of treatment. Here we show that hydrocortisone (HC), prednisolone (P), methylprednisolone (MP), and dexamethasone (DEX) inhibit the hyaluronan (HA) production of orbital (OF) and dermal (DF) fibroblasts. HA production of GO OFs (n = 4), NON-GO OFs (n = 4) and DFs (n = 4) was measured by ELISA. mRNA expression of enzymes of HA metabolism and fibroblast proliferation was examined by RT-PCR and BrdU incorporation, respectively. After 24 h of GC treatment (1µM) HA production decreased by an average of 67.9 ± 3.11% (p < 0.0001) in all cell cultures. HAS2, HAS3 and HYAL1 expression in OFs also decreased (p = 0.009, p = 0.0005 and p = 0.015, respectively). Ten ng/mL PDGF-BB increased HA production and fibroblast proliferation in all cell lines (p < 0.0001); GC treatment remained effective and reduced HA production under PDGF-BB-stimulated conditions (p < 0.0001). MP and DEX reduced (p < 0.001, p = 0.002, respectively) PDGF-BB-induced HAS2 expression in OFs. MP and DEX treatment decreased PDGF-BB stimulated HAS3 expression (p = 0.035 and p = 0.029, respectively). None of the GCs tested reduced the PDGF-BB stimulated proliferation rate. Our results confirm that GCs directly reduce the HA production of OFs, which may contribute to the beneficial effect of GCs in GO.
LA  - English
DB  - MTMT
ER  -