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Doxycycline is an orally active tetracycline antibiotic with broad-spectrum inhibitory effects on matrix metalloproteinases (MMPs), possessing both antibacterial and antitumor activities, and is commonly used in inducible gene expression ON-OFF systems.

Doxycycline (hyclate) is an orally active tetracycline antibiotic with broad-spectrum inhibitory activity against matrix metalloproteinases (MMPs), possessing both antibacterial and antitumor properties, and is commonly used in inducible gene expression ON-OFF systems.

Doxycycline hydrochloride (Hyclate) is an orally active tetracycline antibiotic with broad-spectrum matrix metalloproteinase (MMP) inhibitory activity, possessing both antibacterial and anti-cancer cell proliferation effects, and can be used to induce gene expression in ON-OFF systems.

Dexamethasone is a glucocorticoid receptor agonist and IL receptor modulator with anti-inflammatory, immunosuppressive, and apoptosis-inducing activities. It inhibits the production of inflammatory miRNA-155 exosomes in macrophages, significantly reduces inflammatory cytokine expression in neutrophils and monocytes, suppresses LPS-induced macrophage inflammation, and induces autophagy. It is commonly used to induce animal models of depression, muscle atrophy, and hypertension, and holds potential in COVID-19 research.