[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"cytomegalovirus-disease\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:cytomegalovirus-disease":27},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,1,0,[8],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":14,"acronym":4,"eligibilityCriteria":15,"healthyVolunteers":11,"sex":16,"minAge":17,"maxAge":4,"enrollmentInfo":18,"targetDuration":4,"studyType":21,"phases":22,"briefSummary":24,"conditions":25,"keywords":4,"overallStatus":30,"whyStopped":4,"lastUpdateSubmitDate":31,"lastUpdatePostDateStruct":32,"startDateStruct":35,"completionDateStruct":37,"leadSponsor":39,"locationsCount":42},"100636743","phase-4-letermovir-prophylaxis-duration-guided-by-cmv-specific-t-cell-monitoring-after-allo-hsct-100636743",false,"NCT07569653","Letermovir Prophylaxis Duration Guided by CMV-Specific T-cell Monitoring After Allo-HSCT.","A Multicenter, Randomized, Controlled, Open-label Clinical Study to Evaluate the Efficacy and Safety of Letermovir Prophylaxis Duration Guided by Dynamic Monitoring of Specific T-cells for Preventing Cytomegalovirus Infection in Adult Recipients of Allogeneic Hematopoietic Stem Cell Transplantation in China.","Inclusion Criteria:\n\n1. Recipients of allogeneic hematopoietic stem cell transplantation (allo-HSCT).\n2. CMV serostatus of the recipient is positive (R+).\n3. Aged 18 years or older.\n4. Expected survival \\> 6 months.\n5. Provision of signed informed consent.\n\nExclusion Criteria:\n\n* 1.Active CMV infection or CMV disease at the time of screening.\n\n  2.Known hypersensitivity to Letermovir or its excipients.\n\n  3.Severe hepatic or renal impairment.\n\n  4.Pregnant or breastfeeding women.","ALL","18 Years",{"count":19,"type":20},120,"ESTIMATED","INTERVENTIONAL",[23],"PHASE4","The purpose of this study is to evaluate the efficacy and safety of a personalized strategy for discontinuing Letermovir (a drug used to prevent Cytomegalovirus \\[CMV\\] infection) based on the recovery of the patient's own immune system.\n\nCytomegalovirus (CMV) is a common and serious complication after allogeneic hematopoietic stem cell transplantation (allo-HSCT). Currently, Letermovir is typically given as a standard prevention for about 100 days post-transplant. However, some patients may recover their CMV-specific immunity earlier, while others may need longer protection.\n\nIn this study, researchers will use a dynamic monitoring technology (QuantiFERON-CMV) to detect the level of CMV-specific T-cells in patients. Participants will be randomly assigned to either the experimental group or the control group:\n\nExperimental Group: Letermovir discontinuation will be guided by T-cell recovery. If the test shows that the patient's CMV-specific T-cells have recovered, Letermovir may be stopped earlier than the standard 100 days.\n\nControl Group: Patients will receive the standard Letermovir prophylaxis for approximately 100 days, regardless of T-cell status.\n\nThe study aims to determine if this immune-guided strategy can effectively prevent CMV infection while potentially reducing the duration of medication and associated costs, without increasing the risk of CMV disease.",[26,27,28,29],"Cytomegalovirus Infections","Cytomegalovirus Disease","Hematopoietic Stem Cell Transplantation","Graft vs Host Disease","RECRUITING","2026-05-27",{"date":33,"type":34},"2026-06-01","ACTUAL",{"date":36,"type":34},"2025-10-30",{"date":38,"type":20},"2027-12",{"name":40,"class":41},"WeiShi","OTHER",12]