{"entity":{"id":"idea-bio2-inhaled-lung-niche-immunotherapy","kind":"idea","name":"Inhaled immune therapy to make the lung hostile to arriving tumour cells","aka":[],"tldr":"Breathing in an immune-activating drug could turn the lungs into bad soil for cancer seeds, at doses far too low to cause body-wide side-effects.","summary":"Inhaled GM-CSF was tested in paediatric osteosarcoma lung metastases and inhaled interleukin-2 in renal cancer, both with local immune activation, acceptable safety and underpowered efficacy. Modern versions (an inhaled interleukin-15 superagonist, an inhaled STING agonist or an inhaled anti-CD47) could be aimed at lung-metastasis prevention rather than treatment, where the target cell burden is tiny.","asOf":"2026-09-08","links":[{"label":"Bottleneck evidence (Metastasis is understood least and studied last): Dillekås et al., Are 90% of deaths from cancer caused by metastases? (Cancer Medicine 2019)","url":"https://doi.org/10.1002/cam4.2474"}],"tags":[],"related":[],"cancers":["sarcoma","rcc"],"sections":[],"technologies":["cytokine-therapy","sting-agonist"],"targets":["cd47"],"drugs":[],"companies":["childrens-oncology-group"],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":["b-metastasis-biology","b-tme-immunosuppression"],"keyPapers":["paper-dillekas-cancer-med"],"journals":[],"dependsOn":[],"notes":[],"hypothesis":"Inhaled alveolar immune activation after resection of a lung-tropic tumour halves lung-specific relapse without systemic cytokine toxicity.","rationale":"Metastasis prevention needs high local and low systemic exposure, and the lung is the only metastatic site with a direct non-invasive delivery route. Alveolar macrophage reprogramming is the mechanistic target and is measurable by bronchoalveolar lavage.","test":"A phase 1/2 in resected osteosarcoma or lung-tropic sarcoma with lavage-based pharmacodynamics, then a randomised trial with lung-relapse-free survival as the primary endpoint.","maturity":"preclinical-evidence","actor":"research","cost":"medium","horizonYears":6},"route":"/ideas/idea-bio2-inhaled-lung-niche-immunotherapy/","neighbours":{"cancer":[{"id":"rcc","kind":"cancer","name":"Renal cell carcinoma","route":"/cancers/rcc/"},{"id":"sarcoma","kind":"cancer","name":"Sarcomas (soft tissue, bone, GIST)","route":"/cancers/sarcoma/"}],"technology":[{"id":"cytokine-therapy","kind":"technology","name":"Cytokines & engineered cytokines","route":"/technologies/cytokine-therapy/"},{"id":"sting-agonist","kind":"technology","name":"STING & innate immune agonists","route":"/technologies/sting-agonist/"}],"target":[{"id":"cd47","kind":"target","name":"CD47","route":"/targets/cd47/"}],"company":[{"id":"childrens-oncology-group","kind":"company","name":"Children's Oncology Group (COG)","route":"/companies/childrens-oncology-group/"}],"bottleneck":[{"id":"b-tme-immunosuppression","kind":"bottleneck","name":"Cold tumours and the immunosuppressive microenvironment","route":"/bottlenecks/b-tme-immunosuppression/"},{"id":"b-metastasis-biology","kind":"bottleneck","name":"Metastasis is understood least and studied last","route":"/bottlenecks/b-metastasis-biology/"}],"paper":[{"id":"paper-dillekas-cancer-med","kind":"paper","name":"Are 90% of deaths from cancer caused by metastases?","route":"/key-papers/paper-dillekas-cancer-med/"}]}}