Used in biomedical research to quantify osteopontin levels in rat samples, this ELISA kit supports studies on bone metabolism, inflammation, and tissue remodeling. It is widely applied in research related to osteoporosis, arthritis, kidney disease, and cancer metastasis where osteopontin plays a regulatory role. The kit enables accurate measurement of OPN in serum, plasma, and cell culture supernatants, facilitating investigation of disease mechanisms and evaluation of therapeutic interventions in preclinical models.