TSH enhances neurite outgrowth

被引:0
作者
Mansoori, Maryam [1 ]
Latif, Rauf [1 ,2 ]
Morshed, Syed A. [1 ,2 ]
Zaidi, Mone [3 ]
Davies, Terry F. [1 ,2 ]
机构
[1] Icahn Sch Med Mt Sinai, Thyroid Res Unit, New York, NY 10029 USA
[2] James J Peters VA Med Ctr, Dept Med, New York, NY USA
[3] Icahn Sch Med Mt Sinai, Ctr Translat Med & Pharmacol, New York, NY USA
关键词
TSH (thyroid stimulating hormone); TSHR (thyroid-stimulating hormone receptor); neurite outgrowth; differentiation protocol; neurite length; THYROTROPIN RECEPTOR; EXPRESSION; DISEASE; STEM;
D O I
10.3389/fendo.2024.1463964
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Extra-thyroidal effects of TSH have been reported in various tissues expressing the TSH receptor (TSHR) including several areas of the brain. However, the influence of TSH on neuronal phenotypes has not been examined. Using a well-characterized human neuroblastoma cell line (SH-SY5Y), we have examined TSH signaling effects on the phenotype of these cells after their neuronal differentiation. Following an 18-day differentiation protocol, we successfully redifferentiated the SH-SY5Y cells into similar to 100% neuronal cells as indicated by the development of extensive neurofilaments with SMI-31 expression. Furthermore, using absolute digital PCR, we quantified TSHR mRNA, and also TSHR protein expression, in the redifferentiated cells and found that the neuronal cells expressed high quantities of both TSHR message and protein at baseline. Exposure to TSH induced primary, secondary, and tertiary neurite outgrowths, which are essential for cell-cell communication. Quantitative analysis of neurites using ImageJ showed a dose-dependent increase in neurites. The addition of TSH up to 1 mU/ml resulted in a similar to 2.5-fold increase in primary, and similar to 1.5-fold in secondary and tertiary neurites. The lengths of the neurites remained unaffected with the dosage of TSH treatment. Furthermore, TSHR signaling in the differentiated cells resulted in enhanced generation of cAMP, pPI3K, pAKT, and pNFkB pathways and suppression of pMAPK suggesting an influence of these signals in driving neurite outgrowth. These data showed that the TSH/TSHR axis in neurons may contribute to enhanced neurite outgrowth. The potential pathophysiological effects of TSH on the induction of neurite outgrowth and its relationship to neurodegenerative diseases remain to be explored.
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页数:8
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