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Expression analysis of two SLAM family receptors, SLAMF2 and SLAMF7, in patients with multiple myeloma

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Abstract

Monoclonal antibodies against surface antigens on MM cells, such as anti-SLAMF7 and anti-CD38 antibodies, represent an attractive therapeutic modality for the eradication of multiple myeloma (MM) cells. However, further exploration of target molecules is urgently needed for the development of more effective therapies. In the present study, we studied the expression of CD48 in a total of 74 primary MM samples derived from patients to evaluate SLAMF2 (CD48) as a candidate in mAb therapy for MM. Of 74 samples, 39 were subjected to SLAMF7 analysis. Most of the MM cells, defined as CD38 and CD138 double-positive cells, showed strong expression of CD48 or SLAMF7 independent of disease stage or treatment history. In these 39 samples, most MM cells showed expression of both SLAMF7 and CD48; however, several samples showed expression of either only CD48 or only SLAMF7, including seven cases that were only highly positive for SLAMF7, and five that were only highly positive for CD48. Our study demonstrates that the immune receptor CD48 is overexpressed on MM cells together with SLAMF7, and that CD48 may be considered as an alternative target for treatment of MM in cases showing weak expression of SLAMF7.

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Acknowledgements

We thank Ms. Chiori Fukuyama for her skillful technical assistance. The study received financial support from Bristol-Myers Squibb. We acknowledge the support of the Egyptian Ministry of Higher Education (Cultural Affairs Sector and Missions). This work was partly supported by a Grant-in-Aids for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology (16K07179 & 16K09855), the National Cancer Center Research and Development Fund (26-A-4), and the Practical Research for Innovative Cancer Control from the Japan Agency for Medical Research and Development, AMED (15ck0106077h0002).

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Authors and Affiliations

  1. Division of Blood Transfusion, Department of Hematology and Oncology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-chou, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan

    Reham Ashour, Masaki Ri, Takashi Yoshida, Takuto Tachita, Takashi Kanamori, Sho Aoki, Shiori Kinoshita, Tomoko Narita, Haruhito Totani, Ayako Masaki, Asahi Ito, Shigeru Kusumoto, Hirokazu Komatsu & Shinsuke Iida

  2. Department of Clinical Pathology, Qena University Hospital, South Valley University, Qena, Egypt

    Reham Ashour, Sanaa Shaker Aly & Abdelrahman A. Elsaied

  3. Division of Blood Transfusion, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan

    Masaki Ri

  4. Clinical Pathology Department, South Egypt Cancer Institute, Assiut University, Assiut, Egypt

    Samar Mansour

  5. Department of Gastroenterology and Hematology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan

    Takuto Tachita

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  1. Reham Ashour
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  2. Masaki Ri
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Correspondence to Masaki Ri.

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Conflict of interest

MR received research funding from Celgene Co., Ltd. SI received research funding and declares Honoraria from Janssen Pharmaceutical K.K., and Celgene Co., Ltd. SI also received research funding from Kyowa Hakko Kirin Co., Ltd., Chugai Pharmaceutical Co., Ltd, Bristol-Myers Squibb, Takeda Yakuhin Co., Ltd., and Ono Pharmaceutical CO., Ltd.

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Ashour, R., Ri, M., Aly, S.S. et al. Expression analysis of two SLAM family receptors, SLAMF2 and SLAMF7, in patients with multiple myeloma. Int J Hematol 110, 69–76 (2019). https://doi.org/10.1007/s12185-019-02649-3

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  • DOI: https://doi.org/10.1007/s12185-019-02649-3

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