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flag Researchers found a protein pathway linked to cancer-related bone loss and identified drugs that may protect bones in patients.

flag Researchers at the University of Nebraska Medical Center have identified the unfolded protein response (UPR) pathway as a promising target for treating bone weakening in cancer patients. flag The UPR, which manages stress in the endoplasmic reticulum, is often disrupted in cancers like multiple myeloma, breast and prostate metastases, and bone tumors, leading to imbalanced bone remodeling, increased bone loss, and higher fracture risk. flag By targeting key UPR proteins such as EIF2AK3, ERN1, and ATF6, scientists aim to restore bone strength and reduce skeletal-related events. flag Several experimental drugs—like sunitinib, sodium phenylbutyrate, zoledronic acid, and oprozomib—show potential in early studies by inhibiting harmful UPR signals, improving protein folding, or killing cancer cells in bone. flag However, challenges remain in developing selective treatments that protect healthy tissue while effectively treating cancer-induced bone disease. flag Further research is needed to confirm safety and effectiveness in humans.

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