Although prolactin (PRL) and its receptor (PRLR) have been detected in glioblastoma multiforme (GBM), their role in its pathogenesis remains unclear. Our aim was to explore their contribution in GBM pathogenesis. We detected PRL and PRLR in all GBM cell lines tested. PRLR activation or overexpression using plasmid transfection increased proliferation, viability, clonogenicity, chemoresistance and matrix metalloproteinase activity in GBM cells, while PRLR antagonist ∆1–9-G129R-hPRL reduced their proliferation, viability, chemoresistance and migration. Meta-analysis of transcriptomic data indicated that PRLR was expressed in all grade II-III glioma (GII-III) and GBM samples. PRL was upregulated in GBM biopsies when compared to GII-III. While in the general population tumour PRL/PRLR expression did not correlate with patient survival, biological sex-stratified analyses revealed that male patients with PRL+/PRLRHIGH GBM performed worse than PRL+/PRLRLOW GBM. In contrast, all male PRL+/PRLRHIGH GII-III patients were alive whereas only 30% of PRL+/PRLRLOW GII-III patients survived after 100 months. Our study suggests that PRLR may be involved in GBM pathogenesis and could constitute a therapeutic target for its treatment. Our findings also support the notion that sexual dimorphism should be taken into account to improve the care of GBM patients.
La Osteoartritis es una de las artropatías más frecuentes en los equinos deportivos y es causa de grandes pérdidas económicas asociadas. El diagnóstico precoz de esta enfermedad, que en ocasiones no es factible con estudios radiográficos, deviene en la posibilidad de realizar un tratamiento temprano con el objeto de evitar mayor compromiso del hueso subcondral subyacente. Si bien ciertas citoquinas cumplen un rol fisiológico en el normal remodelado óseo y articular su incremento puede ser considerado patológico. En este estudio se postula el uso de la determinación de citoquinas de origen osteoarticular (TNF-α, IL-1β, IL-6, IL-4), para el diagnóstico de la osteoartritis así como para la evaluación de su evolución post tratamiento con pamidronato, aminobisfosfonato de segunda generación. Se trabajó con tres grupos de equinos de distintas edades, mayores de 4 años, clasificados según la presencia o no de enfermedad articular y el grado de actividad de la misma, para luego evaluar la respuesta al tratamiento con bisfosfonatos en los casos de enfermedad articular. Como pudo observarse, los niveles de citoquinas se encontraron elevados durante la enfermedad articular activa y las mismas disminuyeron su concentración post tratamiento con el bisfosfonato utilizado.
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