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1,624 results for “Steroids”
Steroid concentrations in boar tissues
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Data from: Heavily hunted wolves have higher stress and reproductive steroids than wolves with lower hunting pressure
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Data from: Of 11 candidate steroids, corticosterone concentration standardized for mass is the most reliable steroid-biomarker of nutritional stress across different feather types
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Data from: Non-steroidal anti-inflammatory drugs use in older adults decreases risk of Alzheimer’s disease mortality
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Uterine scarring leads to adverse pregnant consequence through impairing the response of endometrium to steroids
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A retrospective cohort study on effects of antenatal steroids on respiratory morbidity for term elective Caesarean sections in South Asian women
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Effectiveness of steroid therapy on pneumonic chronic obstructive pulmonary disease exacerbation: a multi-centred retrospective cohort study
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Data from: Managing anabolic steroids in pre-hibernating Arctic ground squirrels: obtaining their benefits and avoiding their costs
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Data from: Feather steroid hormone concentrations in relation to age, sex, and moulting time in a long distance migratory passerine
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Data from: Steroid hormones in hair reveal sexual maturity and competition in wild house mice (Mus musculus domesticus)
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Unmasking viral sequences by metagenomic next-generation sequencing in adult human blood samples during steroid-refractory/dependent graft-versus-host disease
<p><b>Background: </b>Viral infections are common complications following allogeneic hematopoietic stem cell transplantation (allo-HSCT<b>)</b>. Allo-HSCT recipients<b> </b>with steroid-refractory/dependent graft-versus-host disease (GvHD) are highly immunosuppressed and are more vulnerable to infections with weakly pathogenic or commensal viruses. Here, twenty-five adult allo-HSCT recipients from 2016 to 2019 with acute or chronic steroid-refractory/dependent GvHD were enrolled in a prospective cohort of patients at Geneva University Hospitals. We performed metagenomics next-generation sequencing (mNGS) analysis using a validated viral pipeline and <i>de novo</i> analysis on pooled stored routine plasma samples collected throughout the period of intensive steroid treatment or second-line GvHD therapy to identify weakly pathogenic, commensal and unexpected viruses.</p> <p><b>Results: </b>Median duration of intensive immunosuppression was 5.1 months (IQR 5.5).<b> </b>GvHD-related mortality rate was 36%.<b> </b>mNGS analysis detected viral nucleotide sequences in 24/25 patients. Sequences of ≥3 distinct viruses were detected in 16/25 patients, <i>Anelloviridae</i> (24/25) and human pegivirus-1 (9/25) were the most prevalent. In 7/25 patients with fatal outcomes, unexpected viral sequences, not assessed by routine investigations, were identified with mNGS and confirmed by RT-PCR. These cases included usutu virus (1), rubella virus (1 vaccine-strain and 1 wild-type), novel human astrovirus (HAstV) MLB2 (1), classic HAstV (1), human polyomavirus 6 and 7 (2), cutavirus (1), and bufavirus (1).</p> <p><b>Conclusions: </b>Unexpected, opportunistic and protracted viral infections were identified in 28% of highly immunocompromised allo-HSCT recipients with steroid refractory/dependent GvHD. These identified viruses have all been previously described in humans, but have poorly understood clinical significance. Rubella virus identification raises the possibility of re-emergence from past infections or vaccinations.</p>
Data from: Towards the validation of endogenous steroid testing in wildlife hair
1. Hair is emerging as a popular tool to examine steroid hormone levels in wild mammals. The reliability of this approach, however, depends on an understanding of steroid hormone incorporation into hair as well as appropriate validations. 2. We reviewed studies that have examined steroid hormones in wildlife hair with the goal of summarizing the analytical, physiological, and biological evidence that this approach is meaningful. Accordingly, we differentiated among validations aimed at evaluating the reliability of the analytical method versus those designed to assess whether hormone levels in hair reflect physiologically meaningful processes in the target species. 3. Our literature survey revealed that endogenous steroids have been examined in hair from 42 species of non-human animals across 7 mammalian classes. Although the majority (85%) of 72 studies reported analytical validations of the method, physiological validations have only been reported for five species. Moreover, results of physiological validations were inconsistent among studies, highlighting the need for further research designed carefully to differentiate among the multiple purported models of steroid incorporation into hair in species with different types of hair and hair growth patterns. 4. To complement our review of published studies, we present new data supporting a positive relationship between levels of the steroid, cortisol, in hair and blood across eight mammalian species. In addition, we present novel results from a laboratory-based study showing variable hair growth in genetically identical laboratory mice that were kept under controlled conditions. 5. Synthesis and Applications: Collectively, this synthesis reveals substantial progress towards the validation of endocrine assays in hair from a variety of wildlife species. Further validations of other steroids, combined with appropriate physiological validations, would expand the potential applications of hair testing in wildlife research. As a key example, physiological data can provide mechanistic insight into species' responses to change and may therefore contribute to conservation planning.
Data from: Regional difference in sex steroid action on formation of morphological sex differences in the anteroventral periventricular nucleus and principal nucleus of the bed nucleus of the stria terminalis
Sex steroid action is critical to form sexually dimorphic nuclei, although it is not fully understood. We previously reported that masculinization of the principal nucleus of the bed nucleus of the stria terminalis (BNSTp), which is larger and has more neurons in males than in females, involves aromatized testosterone that acts via estrogen receptor-α (ERα), but not estrogen receptor-β (ERβ). Here, we examined sex steroid action on the formation of the anteroventral periventricular nucleus (AVPV) that is larger and has more neurons in females. Morphometrical analysis of transgenic mice lacking aromatase, ERα, or ERβ genes revealed that the volume and neuron number of the male AVPV were significantly increased by deletion of aromatase and ERα genes, but not the ERβ gene. We further examined the AVPV and BNSTp of androgen receptor knockout (ARKO) mice. The volume and neuron number of the male BNSTp were smaller in ARKO mice than those in wild-type mice, while no significant effect of ARKO was found on the AVPV and female BNSTp. We also examined aromatase, ERα, and AR mRNA levels in the AVPV and BNSTp of wild-type and ARKO mice on embryonic day (ED) 18 and postnatal day (PD) 4. AR mRNA in the BNSTp and AVPV of wild-type mice was not expressed on ED18 and emerged on PD4. In the AVPV, the aromatase mRNA level was higher on ED18, although the ERα mRNA level was higher on PD4 without any effect of AR gene deletion. Aromatase and ERα mRNA levels in the male BNSTp were significantly increased on PD4 by AR gene deletion. These results suggest that estradiol signaling via ERα during the perinatal period and testosterone signaling via AR during the postnatal period are required for masculinization of the BNSTp, whereas the former is sufficient to defeminize the AVPV.
Data from: Perturbing the cellular cevels of steroid receptor coactivator-2 impairs murine endometrial function
As pleiotropic coregulators, members of the p160/steroid receptor coactivator (SRC) family control a broad spectrum of transcriptional responses that underpin a diverse array of physiological and pathophysiological processes. Because of their potent coregulator properties, strict controls on SRC expression levels are required to maintain normal tissue functionality. Accordingly, an unwarranted increase in the cellular levels of SRC members has been causally linked to the initiation and/or progression of a number of clinical disorders. Although knockout mouse models have underscored the critical non-redundant roles for each SRC member in vivo, there are surprisingly few mouse models that have been engineered to overexpress SRCs. This deficiency is significant since SRC involvement in many of these disorders is based on unscheduled increases in the levels (rather than the absence) of SRC expression. To address this deficiency, we used recent mouse technology that allows for the targeted expression of human SRC-2 in cells which express the progesterone receptor. Through cre-loxP recombination driven by the endogenous progesterone receptor promoter, a marked elevation in expression levels of human SRC-2 was achieved in endometrial cells that are positive for the progesterone receptor. As a result of this increase in coregulator expression, female mice are severely subfertile due to a dysfunctional uterus, which exhibits a hypersensitivity to estrogen exposure. Our findings strongly support the proposal from clinical observations that increased levels of SRC-2 are causal for a number of endometrial disorders which compromise fertility. Future studies will use this mouse model to decipher the molecular mechanisms that underpin the endometrial defect. We believe such mechanistic insight may provide new molecular descriptors for diagnosis, prognosis, and/or therapy in the clinical management of female infertility.
ENDOSCOPIC PRESENTATION OF THE UPPER GASTROINTESTINAL TRACT WITH VARIOUS NON-STEROIDAL ANTI-INFLAMMATORY DRUGS IN PATIENTS WITH RHEUMATOID ARTHRITIS
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Fig. 3 in Secoergostane- and ergostane-type steroids from Pleurotus cornucopiae var. citrinopileatus
Fig. 3. NOESY correlations and pyridine-induced deshielding effects observed for compound 1.
Fig. 2. HMBC and 1H–1H COSY correlations observed for compounds 1–5 in Secoergostane- and ergostane-type steroids from Pleurotus cornucopiae var. citrinopileatus
Fig. 2. HMBC and 1H–1H COSY correlations observed for compounds 1–5.
Fig. 1 in Secoergostane- and ergostane-type steroids from Pleurotus cornucopiae var. citrinopileatus
Fig. 1. Structures of compounds.
Fig. 5 in Secoergostane- and ergostane-type steroids from Pleurotus cornucopiae var. citrinopileatus
Fig. 5. NOESY correlations and pyridine-induced deshielding effects observed for compound 4.
Fig. 6 in Secoergostane- and ergostane-type steroids from Pleurotus cornucopiae var. citrinopileatus
Fig. 6. NOESY correlations and pyridine-induced deshielding effects observed for compound 5.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.