OBJECTIVES: To evaluate the expression of CD335 (NKp46), an activation receptor that is selectively expressed on natural killer (NK) cells. METHODS: We assessed CD335's potential utility as a diagnostic marker in 657 cases by flow cytometry and 410 cases by immunohistochemistry. RESULTS: We observed that CD335 was highly specific for NK cells in nonneoplastic tissues. Moreover, 61 (90%) of 68 of NK cell neoplasms demonstrated CD335 expression, whereas B-cell, myelomonocytic, and plasma cell neoplasms lacked expression. Notably, 16 (20%) of 82 mature T-cell neoplasms, particularly T-cell large granular lymphocytic leukemia, mycosis fungoides, and ALK+ anaplastic large cell lymphoma, aberrantly expressed CD335. CONCLUSIONS: Collectively, these data support the diagnostic utility of CD335 in evaluating hematopoietic malignancies and suggest that CD335 could be a useful target for selective immunotherapy in patients with mature NK and T-cell neoplasms.
OBJECTIVES: To evaluate the expression of CD335 (NKp46), an activation receptor that is selectively expressed on natural killer (NK) cells. METHODS: We assessed CD335's potential utility as a diagnostic marker in 657 cases by flow cytometry and 410 cases by immunohistochemistry. RESULTS: We observed that CD335 was highly specific for NK cells in nonneoplastic tissues. Moreover, 61 (90%) of 68 of NK cell neoplasms demonstrated CD335 expression, whereas B-cell, myelomonocytic, and plasma cell neoplasms lacked expression. Notably, 16 (20%) of 82 mature T-cell neoplasms, particularly T-cell large granular lymphocytic leukemia, mycosis fungoides, and ALK+ anaplastic large cell lymphoma, aberrantly expressed CD335. CONCLUSIONS: Collectively, these data support the diagnostic utility of CD335 in evaluating hematopoietic malignancies and suggest that CD335 could be a useful target for selective immunotherapy in patients with mature NK and T-cell neoplasms.
Entities:
Keywords:
CD335; Large granular lymphocyte; Leukemia; Lymphoma; NKp46; Natural killer; T cell
Authors: Fernando Concha-Benavente; Benjamin Kansy; Jessica Moskovitz; Jennifer Moy; Uma Chandran; Robert L Ferris Journal: Cancer Immunol Res Date: 2018-10-03 Impact factor: 11.151