Volume 36, Issue 5 pp. 521-530
Original Article

Novel and rapid enumeration method of peripheral blood stem cells using automated hematology analyzer

R. Tanosaki

Corresponding Author

R. Tanosaki

Department of Blood Transfusion and Cellular Therapy, National Cancer Center Hospital, Tokyo, Japan

Correspondence:

Ryuji Tanosaki, Department of Blood Transfusion and Cellular Therapy, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.

Tel.: +81 3 3542 2511, +81 3 3547 5201 (X 7066);

Fax: +81 3 3542 3815;

E-mail: [email protected]

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T. Kumazawa

T. Kumazawa

Department of Blood Transfusion and Cellular Therapy, National Cancer Center Hospital, Tokyo, Japan

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A. Yoshida

A. Yoshida

Sysmex Corporation, Kobe, Japan

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S. Oguni

S. Oguni

Sysmex Corporation, Kobe, Japan

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A. Nakano

A. Nakano

Department of Pathology and Clinical Laboratories, National Cancer Center Hospital, Tokyo, Japan

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S. Yamagata

S. Yamagata

Department of Hematology and Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan

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N. Takahashi

N. Takahashi

Department of Hematology and Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan

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S. Kurosawa

S. Kurosawa

Department of Hematology and Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan

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S. W. Kim

S. W. Kim

Department of Hematology and Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan

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T. Yamashita

T. Yamashita

Department of Hematology and Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan

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S. Mori

S. Mori

Department of Hematology and Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan

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Y. Heike

Y. Heike

Department of Hematology and Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan

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T. Fukuda

T. Fukuda

Department of Hematology and Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan

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Y. Hamaguchi

Y. Hamaguchi

Sysmex Corporation, Kobe, Japan

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H. Tsuda

H. Tsuda

Department of Pathology and Clinical Laboratories, National Cancer Center Hospital, Tokyo, Japan

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First published: 27 December 2013
Citations: 16

Summary

Introduction

The number of infused CD34+ cells is crucial to the success of peripheral blood stem cell transplantation (PBSCT). Here, we present, for the first time, a new method of enumerating hematopoietic progenitor cells (HPCs) for PBSCT.

Method

This novel method is based on hemolysis and chemical staining, followed by flow cytometry-based optical detection, conducted using an automated hematology analyzer (XN series, Sysmex). CD34+ cells and HPCs were compared in 76 granulocyte colony-stimulating factor (G-CSF)-mobilized blood or apheresis samples taken from healthy donors (n = 18) or patients undergoing autologous PBSCT (n = 6).

Results

There was a strong correlation between the numbers of HPCs and CD34+ cells (R2 = 0.958). The expected total number of HPCs in the final products, which was estimated from HPCs in pre-apheresis PB or mid-apheresis products, also correlated well with the total number of CD34+ cells in the final products. The change in HPCs in PB closely resembled that of CD34+ cells during mobilization. Experiments using immunomagnetic beads suggested that the majority of CD34+ cells existed in HPCs, and vice versa.

Conclusion

Hematopoietic progenitor cells may serve as surrogates for CD34+ cells in PBSCT. However, further investigations are required to verify this.

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