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An LC-MS/MS assay for simultaneous determination of 13 steroid hormones and two synthetic steroids in saliva: potential utility for paediatric population and beyond.
Scand J Clin Lab Invest
December 2024
Hormone Laboratory, Department of Medical Biochemistry and Biochemical Endocrinology and Metabolism Research Group, Oslo University Hospital, Aker, Oslo, Norway.
Saliva samples offer the possibility to obtain stress-free non-invasive samples, also for home-testing, especially useful when blood collection is either undesirable or difficult. The aim of this work was to develop an LC-MS/MS method to determine clinically relevant steroid hormones cortisol, cortisone, 11-deoxycortisol, 21-deoxycortisol, 17OH-progesterone, aldosterone, corticosterone, deoxycorticosterone, testosterone, androstenedione, DHEAS, DHEA, 17OH-pregnenolone, betamethasone and dexamethasone. A special effort was made to adapt the method to neonatal population with respect to choice of saliva as matrix, low sample volumes, selection of analytes and multiplexing.
View Article and Find Full Text PDFEffects of the combination of Epimedium brevicornum Maxim, Ligustrum lucidum Ait and Dexamethasone on asthmatic rats by endogenous glucocorticoid pathway.
J Ethnopharmacol
December 2024
School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China. Electronic address:
Ethnopharmacological Relevance: The theory of traditional Chinese medicine (TCM) believes that kidney deficiency is the fundamental cause of chronic refractory asthma, accompanied by pathological changes such as airway remodeling and a reduction of endogenous glucocorticoid (GC) synthesis. The combination of Epimedium brevicornum Maxim (EB) and Ligustrum lucidum Ait (LL) is frequently used in TCM for kidney tonifying and the alleviation of asthma symptoms. This approach is based on Pei-Ben formula, a renowned treatment for asthma developed by the distinguished Shanghai Practitioner, Professor Huiguang Xu, over 30 years of clinical experience.
View Article and Find Full Text PDFA glucocorticoid spike derails muscle repair to heterotopic ossification after spinal cord injury.
Cell Rep Med
December 2024
Mater Research Institute - The University of Queensland, Translational Research Institute, Woolloongabba, QLD 4102, Australia. Electronic address:
Why severe injury to the central nervous system (CNS) triggers the development of large neurogenic heterotopic ossifications (NHOs) within periarticular muscles remains unknown. We report that spinal cord injury (SCI) triggers a rapid corticosterone spike in mice, which is causal for NHO development because treatments with corticosterone or the synthetic glucocorticoid (GC) receptor (GR) agonist dexamethasone are sufficient to trigger heterotopic ossification and upregulate the expression of osteoinductive and osteogenic differentiation genes in injured muscles even without SCI. The central role for GR signaling in causing NHO is further demonstrated in mice deleted for the GR gene (Nr3c1), which no longer develop NHO after SCI.
View Article and Find Full Text PDFGlucocorticoids Selectively Inhibit Hippocampal CA1 Pyramidal Neurons Activity Through HCN Channels.
Int J Mol Sci
November 2024
Department of Physiology and Neurobiology, School of Life Sciences, Fudan University, Shanghai 200438, China.
Glucocorticoids are known to influence hippocampal function, but their rapid non-genomic effects on specific neurons in the hippocampal trisynaptic circuit remain underexplored. This study investigated the immediate effects of glucocorticoids on CA1 and CA3 pyramidal neurons, and dentate gyrus (DG) granule neurons in rats using the patch-clamp technique. We found that a 5 min extracellular application of corticosterone significantly reduced action potential firing frequency in CA1 pyramidal neurons, while no effects were observed in CA3 or DG neurons.
View Article and Find Full Text PDFA new pharmacological strategy against treatment-resistant depression.
Prog Neuropsychopharmacol Biol Psychiatry
November 2024
Departamento de Fisiología Humana, Facultad de Medicina, Universidad de Málaga, Instituto de Investigación Biomédica de Málaga (IBIMA), Campus de Teatinos s/n, Málaga, Spain. Electronic address:
Major depressive disorder affects more than 50 million people in the world. However, 50% of patients don't respond to two or more drugs or psychotherapeutic treatments, named treatment-resistant depression (TRD). In this work, we propose a new augmentation treatment against TRD based on combining Fluoxetine (FLX) and the N-terminal fragment Galanin, GAL(1-15).
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