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Corticosterone elisa

Manufactured by Enzo Life Sciences
Sourced in United States

The Corticosterone ELISA kit is a quantitative enzyme-linked immunosorbent assay designed to measure corticosterone levels in various sample types, including serum, plasma, and tissue extracts. The kit uses a competitive immunoassay principle to determine the concentration of corticosterone in the samples.

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8 protocols using corticosterone elisa

1

Plasma Hormone Quantification and Hepatic Triglycerides

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Hormone concentrations in plasma sampled at the time of killing were measured with the following commercially available kits: insulin, Ultrasensitive Mouse Insulin ELISA (Mercodia, Uppsala, Sweden); leptin, Metabolism & Endocrinology Multiplex Assays (Luminex, Merck Millipore, Burlington, MA, USA); adiponectin, Quantikine ELISA Mouse Adiponectin/Acrp30 (R&D Systems, MN, USA); fibroblast growth factor-21 (FGF-21), Quantikine ELISA Mouse/Rat FGF-21 (R&D Systems); corticosterone, Corticosterone ELISA (Enzo Life Sciences, Farmingdale, NY, USA). Hepatic triglycerides were determined after extraction according to Folch (32 (link)) using the Triglyceride Determination Kit from Sigma Aldrich (St. Louis, MO, USA).
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2

Serum Corticosterone Measurement Protocol

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To measure serum corticosterone concentration, blood (~200 μL) was collected by decapitation (for terminal corticosterone measurement) or by submandibular vein puncture (for serial corticosterone measurement). The blood was allowed to coagulate at room temperature for 90 min and was centrifuged at 2000 × g for 15 min. Serum was collected and samples were stored at −20°C until they were shipped to the University of Virginia Center for Research in Reproduction Ligand Assay and Analysis Core (terminal experiments), where corticosterone levels were measured by 125I corticosterone radioimmunoassay, or until they were assayed in-house using a corticosterone ELISA (Enzo Life Sciences, Farmingdale, NY) according to the manufacturer’s instructions (for serial measurement experiments).
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3

Plasma Corticosterone in Stress Response

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In order to determine whether physiological stress responses differed after contextual re-exposure in males exposed to either direct social defeat (intruders) or witness stress, plasma corticosterone was measured using a Corticosterone ELISA (Enzo Life Sciences, Farmingdale, NY). Plasma was diluted 1:40 and run according to manufacturer protocol. Plates were read using a Synergy 2 Multi-Mode plate reader (Bio Tek, Winooski, VT) with Gen5 software (Bio Tek, Winooski, VT).
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4

Corticosterone Quantification from Blood

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Trunk blood was collected, then allowed to sit overnight at 4 °C. The following day, samples were centrifuged at 3,000 rcf, then the supernatant was collected and stored at −80 °C until use. All samples were run in duplicate using the Corticosterone ELISA (Enzo) and concentration was determined as percentage bound using a standard curve ranging from 32 – 20,000 pg mL−1.
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5

Quantifying Stress Hormone Levels

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To determine differences in circulating stress hormones following the acute defeat challenge, plasma corticosterone was measured using a Corticosterone ELISA (Enzo Life Sciences, Farmingdale, NY) as previously published (Finnell et al., 2017b (link)). Briefly, plasma was diluted 1:40 and run according to manufacturer protocol. Plates were read using a Synergy 2 Multi-Mode plate reader (Bio Tek, Winooski, VT) with Gen5 software (Bio Tek, Winooski, VT).
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6

Circadian Regulation of Corticosterone

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All sacrifice started at 10:00 am. The mice of each group were anesthetized at the same time with 2.5% isoflurane followed by decapitation. Truckal blood was collected, set on ice for 30 min, and centrifuged. Corticosterone was measured using a corticosterone ELISA (Enzo). Thymus and spleen were dissected, weighed, and immediately processed for flow cytometry.
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7

Plasma Corticosterone Quantification

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Corticosterone quantification of plasma (15 μL) collected from trunk blood at the sacrifice was performed using a corticosterone ELISA (Enzo Life Sciences) and was performed according to the manufacturer's instructions and was analysed as previously described (Bastiaanssen et al., 2021 (link); Anand Gururajan et al., 2022 (link)). A multi-mode plate reader (Synergy HT, BioTek Instruments) was used to quantify light absorbance in the assay, at 405 nm. Only data derived from duplicates with <15% CV were included in the analysis. Concentrations of plasma corticosterone were expressed in ng/mL. Limit of detection is represented in Supplementary Table 1.
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8

Corticosterone Quantification from Blood

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Trunk blood was collected, then allowed to sit overnight at 4 °C. The following day, samples were centrifuged at 3,000 rcf, then the supernatant was collected and stored at −80 °C until use. All samples were run in duplicate using the Corticosterone ELISA (Enzo) and concentration was determined as percentage bound using a standard curve ranging from 32 – 20,000 pg mL−1.
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