Abstract
In the field of protein biology, immunology-based techniques are continuously evolving for the detection and quantification of individual protein levels, protein–protein interaction, and protein modifications in cells and tissues. The proximity ligation assay (PLA), a method of detection that combines immunologic and PCR-based approaches, was developed to overcome some of the drawbacks that are inherent with other detection methods. The PLA allows for very sensitive and discretely quantifiable measures of unmodified, native protein levels and protein–protein interaction/modification complexes in situ in both fixed tissues and cultured cells. We describe herein the PLA method and its applicability to quantify the effects of estrogen on expression of angioregulatory factors, e.g., endothelial nitric oxide synthase (eNOS) in the vasculature, vascular endothelial growth factor (VEGF) in the placenta, and melanocortin 2 receptor (MC2R)/accessory protein (MRAP) in the fetal adrenal of the nonhuman primate.
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Acknowledgments
The authors appreciate the contributions of Dr. Graham Aberdeen in the collection of tissues used in this chapter. This work was supported by NIH Research Grants R01 HD 93070 and R01 DK 120513.
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Bonagura, T.W., Babischkin, J.S., Pepe, G.J., Albrecht, E.D. (2022). Quantification of Protein Expression by Proximity Ligation Assay in the Nonhuman Primate in Response to Estrogen. In: Eyster, K.M. (eds) Estrogen Receptors. Methods in Molecular Biology, vol 2418. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-1920-9_6
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DOI: https://doi.org/10.1007/978-1-0716-1920-9_6
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