STING1 and neoplasm: Wang et al. [145] fabricated a self-assembling supramolecular hydrogel by encapsulating the cyclic-d-AMP STING agonist which was electrostatically complexed with nanotubes, comprising a peptide–drug conjugate, a peptide that binds to the protein neuropilin-1, which is highly expressed in tumours, and the chemotherapeutic agent camptothecin.