Clinical Trial

Disease: Relapsed or Refractory B-cell Malignancies, (NCT04037566)

Disease info:

B-cell malignancies are cancers that arise from abnormalities in B cells, and include B-cell lymphomas and leukaemias. While leukaemias typically originate in the bone marrow and spread through the bloodstream, lymphomas usually originate in the lymph nodes or the spleen and spread through the lymphatic system.

There are more than 70 known types of B-cell lymphoma, and these make up approximately 85 % of all cases of non-Hodgkin lymphomas in the United States. NHL is one of the most common cancers in the United States, accounting for about 4% of all cancers. B-cell lymphomas may grow and spread slowly with few symptoms (also known as indolent lymphoma) or may be very aggressive with severe symptoms. Other common types of B-cell lymphoma include:

  • Diffuse large B-cell lymphoma (DLBCL)
  • Follicular lymphoma
  • Chronic lymphocytic leukaemia (CLL) /small lymphocytic lymphoma (SLL)
  • Mantle cell lymphoma (MCL)
  • Marginal zone lymphomas
  • Burkitt lymphoma

In leukaemia, the bone marrow produces abnormal levels of white blood cells. B-cell acute lymphoblastic leukaemia (B-ALL) is an aggressive leukaemia in which too many B-cell lymphoblasts (immature white blood cells) are found in the bone marrow and blood. B-ALL is the most common type of ALL. Note that B-ALL is also called B-cell acute lymphocytic leukaemia and precursor B-lymphoblastic leukaemia. 

Relapsed refers to when a patient has received active treatment, went off treatment and then the disease came back, whereas refractory refers to disease that is progressing despite active treatment.


NHL accounts for about 4% of all cancers in the U.S. The American Cancer Society estimates 80,550 people will be diagnosed with NHL in 2023. ALL accounts for less than 1% of all cancers in the U.S., with 6,540 new cases estimated in the U.S. in 2023.
Official title:
A Safety Study of Autologous T Cells Engineered to Target CD19 and CRISPR Gene Edited to Eliminate Endogenous HPK1 (XYF19 CAR-T Cells) for Relapsed or Refractory Haematopoietic Malignancies.


Name: Guangxun GAO, Dr.

Phone: +86 29 84775203



Name: Yu WANG, Dr.

Phone: +86 29 88764122



Xi'An Yufan Biotechnology Co.,Ltd


China, Shannxi

Xijing Hospital, Xi'an, Shannxi, China, 710032

Study start:
Aug. 1, 2019
40 participants
Gene editing method:
Type of edit:
Gene knock-out
HPK1 hematopoietic progenitor kinase 1 (also known as MAP4K1)
Delivery method:
Lentivirus (LV) and electroporation - Ex-vivo
IND Enabling Pre-clinical
Phase I Safety
Phase II Safety and Dosing
Phase III Safety and Efficacy

Status: Active recruiting


This is a first-in-human trial proposed to test CD19-specific CAR-T cells with edited endogenous HPK1 (XYF19 CAR-T cells) in patients with relapsed or refractory CD19+ leukemia or lymphoma. This is an investigational study designed as a single-center, open-label and single-arm clinical trial. Autologous T cells engineered to specify CD19 transduced with a lentiviral vector and electroporated with CRISPR guide RNA to disrupt expression of endogenous HPK1 administered by IV injection.

Last updated: Dec. 28, 2023
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