{"id":"https://openalex.org/keywords/pd-1","display_name":"PD-1","description":"An inhibitory immune checkpoint protein on cells, especially T cells, that regulates immune responses and is targeted in cancer therapy.","display_name_alternatives":["PD-1 protein","CD279","PD1","programmed cell death 1","programmed cell death 1 protein","programmed cell death 1 receptor","programmed death 1","PDCD1"],"ids":{"openalex":"https://openalex.org/keywords/pd-1","wikidata":"https://www.wikidata.org/wiki/Q21208025"},"primary_topic":{"id":"https://openalex.org/T10158","display_name":"Cancer Immunotherapy and Biomarkers","score":0.3871,"subfield":{"id":"https://openalex.org/subfields/2730","display_name":"Oncology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T10158","display_name":"Cancer Immunotherapy and Biomarkers","score":0.3871,"subfield":{"id":"https://openalex.org/subfields/2730","display_name":"Oncology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T10031","display_name":"T-cell and B-cell Immunology","score":0.0835,"subfield":{"id":"https://openalex.org/subfields/2403","display_name":"Immunology"},"field":{"id":"https://openalex.org/fields/24","display_name":"Immunology and Microbiology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"works_count":29494,"cited_by_count":877058,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/pd-1","updated_date":"2026-10-24T04:06:44","created_date":"2026-09-30T00:00:00"}
