Study validates DHEA and DHEA-S assays in broiler plasma
Bottom line
Researchers in Italy reported an analytical validation study for two immunoassays measuring dehydroepiandrosterone, or DHEA, and dehydroepiandrosterone sulfate, or DHEA-S, in plasma from 68 female broiler chickens collected at slaughter. The paper, published in Animals, found both hormones were detectable, but most values clustered near the lower end of each assay’s calibration range, with DHEA measured by radioimmunoassay and DHEA-S by a species-independent ELISA. The authors also compared their findings with published avian data, adding species-level context to a hormone pair that’s been discussed as a possible stress, resilience, and welfare biomarker in animals. Analytical validation matters here because immunoassays can be vulnerable to matrix effects and cross-reactivity, while mass spectrometry studies have highlighted the value of species-specific validation in avian samples. (pubmed.ncbi.nlm.nih.gov)
Why it matters: For veterinary and poultry professionals, this is less about a practice-changing diagnostic and more about building the measurement groundwork for future biomarker work in broilers. DHEA and DHEA-S have drawn interest as complements to glucocorticoids in animal welfare research, but reviews in the field stress that assay performance has to be validated within each species and sample matrix before results can be interpreted confidently. In birds, that caution is especially relevant because steroid concentrations may be low, plasma can be lipemic, and immunoassay results may not always align with more specific LC-MS/MS methods. (pmc.ncbi.nlm.nih.gov)
What to watch: The next step is whether these assays are followed by biological validation studies, such as linking DHEA or DHEA-S values to stress, health, production, or welfare outcomes in live broiler populations. (pmc.ncbi.nlm.nih.gov)
Key facts
- Study type
- Analytical validation study
- Species
- Female broiler chickens
- Sample size
- 68 birds
- Sample source
- Plasma collected at slaughter
- Analytes
- Dehydroepiandrosterone (DHEA) and dehydroepiandrosterone sulfate (DHEA-S)
- Methods
- DHEA by radioimmunoassay, and DHEA-S by species-independent ELISA
- Main finding
- Both hormones were detectable, but most values were near the lower end of each assay's calibration range
- Published in
- Animals
A new Animals study takes a method-first step toward measuring DHEA and DHEA-S in broiler chickens, validating two immunoassays in plasma from 68 female birds sampled at slaughter and comparing the resulting values with published data from other avian species. The immediate news is technical rather than clinical: the authors show these hormones can be measured in broiler plasma, but they also report that most concentrations sat close to the lower end of the assays’ calibration ranges, underscoring how challenging low-level steroid work can be in poultry. (pmc.ncbi.nlm.nih.gov)
That background matters because DHEA and DHEA-S have gained attention well beyond reproductive endocrinology. Reviews of animal welfare and comparative endocrinology describe them as potentially useful alongside glucocorticoids, with some researchers viewing the glucocorticoid:DHEA balance as a marker of resilience or allostatic load. At the same time, those same reviews emphasize that analytical validation, including precision, accuracy, recovery, and parallelism, has to come before biological interpretation, especially when assays are being adapted across species. (pmc.ncbi.nlm.nih.gov)
The broiler paper fits squarely into that validation phase. According to the study abstract provided, the team evaluated a commercially available RIA kit for DHEA and a species-independent ELISA for DHEA-S, then compared the two biomarkers against each other and against the literature. Blood was collected from 68 female broilers at slaughter. Reported DHEA concentrations ranged from 52 to 354 pg/mL, while DHEA-S values also fell near the lower calibration range for many samples. That low-end clustering is important, because assay performance tends to be most fragile near the lower limit of quantification. (pmc.ncbi.nlm.nih.gov)
Outside this paper, the broader avian endocrinology literature offers both support and caution. DHEA has been measured in a range of bird species, including geese and songbirds, and has been linked to behavior and neuroendocrine function in birds. But method comparison studies in animal biomarker research consistently show that not every assay transfers cleanly across species. A 2012 PLoS One paper, for example, validated LC-MS/MS steroid quantitation across multiple mammalian and avian species and highlighted advantages over immunoassays, including reduced antibody cross-reactivity and the ability to work with lipemic samples. (pubmed.ncbi.nlm.nih.gov)
That concern about assay transferability isn’t theoretical. In another recent chicken biomarker study, investigators found a commercial immunoassay for symmetric dimethylarginine showed low correlation with LC-MS/MS in chicken plasma and advised researchers to favor the mass spectrometry method in that species. While SDMA is a different analyte, the lesson is relevant: poultry biomarker development often hinges on species- and matrix-specific validation, not just off-the-shelf kit availability. (pdfs.semanticscholar.org)
Why it matters: For veterinary professionals working in poultry health, welfare, or research, this study adds a small but useful piece to the biomarker toolbox. It doesn’t establish DHEA or DHEA-S as ready-to-use clinical markers, and it doesn’t show how these analytes track disease, pain, stress, or productivity in the field. What it does do is help define whether commonly available assays can generate interpretable numbers in broiler plasma, which is a prerequisite for any future use in welfare surveillance or physiologic monitoring. More broadly, poultry biomarker reviews continue to stress that no single marker is likely to capture complex outcomes like intestinal health or welfare, so DHEA-based measures would likely need to sit within a larger panel rather than stand alone. (link.springer.com)
Industry or expert reaction specific to this paper was limited in publicly indexed sources, but the surrounding literature points in a consistent direction: DHEA is promising enough to study, yet interpretation should stay conservative until biological validation catches up with analytical validation. Reviews in animal welfare research argue that DHEA may add useful context to glucocorticoid measurements, but only when methods are standardized and tied to meaningful physiologic outcomes. (pmc.ncbi.nlm.nih.gov)
What to watch: The key next milestone is biological validation, ideally in live broilers across defined stressors, disease states, management conditions, or production stages, and preferably with comparison to LC-MS/MS or other orthogonal methods. If future studies can show that DHEA or DHEA-S changes in predictable ways alongside welfare or health endpoints, these hormones could become more relevant to applied poultry medicine rather than remaining mainly research analytes. (pubmed.ncbi.nlm.nih.gov)