[Expression and Significance of PD-1, PD-L1 and CTLA-4 in the Bone Marrow of Patients with Multiple Myeloma].

Objective: To study the expression and significance of PD-1, PD-L1 and CTLA-4 tumor-associated antigens in multiple myeloma.

Methods: Bone marrow specimens from 122 patients with multiple myeloma were collected and divided into new-onset group (NDMM), complete remission group (CRMM) and relapsed and refractory group (RRMM) according to the disease progression stage. The proportion of CD4 T lymphocytes, CD8 T lymphocytes, Treg cells and plasma cells in the specimens and the expressions of PD-1, PD-L1 and CTLA-4 were detected by multi-parameter flow cytometry.

[Application of CD138 Immunomagnetic Bead Sorting Combined with Fluorescence in Situ Hybridization in Multiple Myeloma].

Objective: To compare the effects of direct fluorescence in situ hybridization (D-FISH) detection without sorting and CD138 immunomagnetic bead sorting technology combined with FISH (MACS-FISH) on cytogenetic analysis of patients with multiple myeloma (MM).

Methods: FISH test results of 229 patients with initial MM were retrospectively analyzed. The patients were divided into two groups, 140 patients were tested with D-FISH and 89 patients with MACS-FISH.

Effects of three fertilizer application patterns on wheat sowed by machinery in slope cropland of Western Hubei, China.

Unscientific fertilization, unstable grain quality, and low profit are the key problems on wheat production in slope cropland of Western Hubei. To solve these problems, three optimized planting patterns (high nitrogen and potassium reduction, HNPR; medium nitrogen and potassium reductionm, MNPR; low nitrogen and potassium reduction, LNPR) were conducted during two consecutive years to assess their effects on wheat yield, quality, profit, and fertilizer use efficiency in Danjiangkou Reservoir area, a typical slope cropland region with wheat-maize rotation. The results showed that the application of chemical fertilizer significantly increased grain yield (GY) and wet gluten content (WGC) of wheat.