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Rolf N, Smolen KK, Kariminia A, Velenosi A, Fidanza M, Strahlendorf C, Seif AE, Reid GSD. Absolute lymphocyte counts at end of induction correlate with distinct immune cell compartments in pediatric B cell precursor acute lymphoblastic leukemia. Cancer Immunol Immunother 2018; 67:225-236. [PMID: 29052781 PMCID: PMC11028201 DOI: 10.1007/s00262-017-2070-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 09/26/2017] [Indexed: 01/10/2023]
Abstract
Several retrospective studies in children with B cell precursor (BCP) acute lymphoblastic leukemia (ALL) provided clinical evidence that higher absolute lymphocyte counts (ALC) early into treatment significantly correlated with improved relapse-free and overall survival. It still remains unknown, however, whether the predictive role of higher ALCs reflects general bone marrow recovery or a more specific attribute of immune function. To investigate this question, we implemented a prospective observational cohort study in 20 children with BCP ALL on day 29 (D29) of induction chemotherapy and immunophenotyped their lymphoid (T, B and natural killer cells) and myeloid (neutrophils, monocytes, dendritic cells) compartments. In a first evaluation of a cohort treated with Children's Oncology Group-based induction chemotherapy, the immune cell compartments were differentially depleted at D29. Neither gender, risk status, minimal residual disease, nor bone marrow recovery markers correlated with D29 ALC. In contrast, both CD3+ T cell and dendritic cell compartments, which did not correlate with age, significantly correlated with D29 ALC (p < 0.0001). In addition, subset complexity of cellular immune compartments was preserved at D29. This study reveals that D29 ALC significantly correlates with distinct immune cell compartments but not with bone marrow recovery markers, suggesting that higher D29 ALCs may contribute to leukemia control by inducing specific host immune activity.
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Affiliation(s)
- Nina Rolf
- Michael Cuccione Childhood Cancer Research Program, BC Children's Hospital Research Institute, 950 West 28th Avenue, Reid Lab (Room 3062), Vancouver, BC, V5Z 4H4, Canada.
- Division of Pediatric Hem/Onc/BMT, Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada.
| | - Kinga K Smolen
- Experimental Medicine Program, University of British Columbia, Vancouver, BC, Canada
| | - Amina Kariminia
- Michael Cuccione Childhood Cancer Research Program, BC Children's Hospital Research Institute, 950 West 28th Avenue, Reid Lab (Room 3062), Vancouver, BC, V5Z 4H4, Canada
| | - Adam Velenosi
- Department of Pathology and Laboratory Medicine, BC Children's Hospital Biobank, Vancouver, BC, Canada
| | - Mario Fidanza
- Michael Cuccione Childhood Cancer Research Program, BC Children's Hospital Research Institute, 950 West 28th Avenue, Reid Lab (Room 3062), Vancouver, BC, V5Z 4H4, Canada
- Experimental Medicine Program, University of British Columbia, Vancouver, BC, Canada
| | - Caron Strahlendorf
- Division of Pediatric Hem/Onc/BMT, Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada
| | - Alix E Seif
- Center for Childhood Cancer Research, The Children's Hospital of Philadelphia and Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, PA, USA
| | - Gregor S D Reid
- Michael Cuccione Childhood Cancer Research Program, BC Children's Hospital Research Institute, 950 West 28th Avenue, Reid Lab (Room 3062), Vancouver, BC, V5Z 4H4, Canada
- Division of Pediatric Hem/Onc/BMT, Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada
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