Separation and cryopreservation of cord blood mononuclear cells / 中国实验血液学杂志

The influencing factors on cord blood storage after collection and mononuclear cell separation as well as cryopreservation were studied. The mononuclear cell are separated from blood after blood collection, then cryopreserved and washed after thawed. Results showed that the cord blood kept at 4 degrees C or room temperature less than 24 hours after blood collection, mononuclear cell separated by hydroxyethylstarch and 2 centrifugations, mononuclear cell cryopreserved with 50% DMSO and autoplasma from cord blood as protectives and washing the cells after thawing. In conclusion, the optimal project in this study can effectively preserve cord blood mononuclear cells.

Determination of serum granulocyte colony-stimulating factor level in patients with chronic idiopathic neutropenia and its significance / 中国实验血液学杂志

To investigate the serum granulocyte colony-stimulating factor (G-CSF) level in patients with chronic idiopathic neutropenia (CIN) and analyze its clinical significance. By the use of G-CSF-specific enzyme-linked immunosorbent assay (ELISA), the serum levels of G-CSF were determined in 40 cases with chronic CIN, 40 cases with systemic lupus erythematosus (SLE) complicated neutropenia and 40 healthy volunteer (normal control). Results showed that serum G-CSF was positive in 11 normal controls and in 10 cases with SLE, and the G-CSF levels were (27.34 +/- 8.00) ng/L and (26.76 +/- 7.26) ng/L, respectively. Serum G-CSF in 27 cases with CIN was positive, the level was (134.04 +/- 89.29) ng/L, which was higher than that in the normal controls and the cases with SLE (P < 0.01). It was concluded that an obstacle to utilization of G-CSF could be existed in the patients with CIN.