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Bone metastasis site (via calcium-mimetic uptake)

Molecular classification: Receptor, Ion channel, Other (Microenvironmental niche)

Overview

The bone metastasis site, specifically targeted via calcium-mimetic uptake, represents the unique microenvironment of bone tissue that attracts and supports metastatic cancer cells. This involves an interplay of molecules like the Calcium-Sensing Receptor (CaSR), P2X Receptor, TRPV6 Channel, TRPM7 Channel and SK3 Channel that recognize or exploit the high extracellular calcium concentrations characteristic of bone. These interactions promote tumor cell migration, proliferation, and survival within the bone, leading to a self-perpetuating cycle of bone destruction and tumor growth. Therapeutic strategies, such as the use of radium-223 dichloride (a calcium mimetic), exploit this mechanism to target and treat bone metastases.

Other names: Calcium-sensing receptor (CaSR) in bone metastasisCalcium-mimetic targeting in bone metastasisBone metastasis microenvironmentTRPV6 in bone metastasisP2X Receptor in bone metastasisTRPM7 Channel in bone metastasisSK3 Channel (KCa2.3) in bone metastasis

Mechanism of action

Calcium mimetic; targets areas of increased bone turnover

Biological functions

Signal transductionCell proliferationCell migrationCalcium signalingBone remodeling

Disease associations

CancerBone metastasisProstate cancerBreast cancerRenal cell carcinoma

Safety considerations

Off-target effects of calcium-mimetic drugsPotential for disrupting normal calcium homeostasisResistance to calcium-mimetic therapies

Interacting drugs

Radium-223 dichloride

Biomarkers

CaSR expressionTRPV6 expressionP2X expressionTRPM7 expressionSK3 Channel (KCa2.3) expressionIncreased bone turnover (assessed via imaging)

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