Investigation of 1q21 amplification in patients with multiple myeloma using I-FISH and cIg-FISH / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To investigate the prevlance of 1q21 amplification in patients with multiple myeloma (MM) and its correlation with the progression and prognosis of the disease.</p><p><b>METHODS</b>1q21 amplification was detected in 48 patients with MM using cytoplasmic light chain immunofluorescence with fluorescence in situ hybridization analysis (cIg-FISH) and interphase fluorescence in situ hybridization (I-FISH) analysis combined with CD138 immunomagnetic cell sorting (MACS).</p><p><b>RESULTS</b>1q21 amplification (≥ 3 red signals) was detected in 26/48(54.2%) cases by cIg-FISH and 31/48 (64.6%) cases by I-FISH combined with CD138 MACS. There was a good consistency between the two methods (P>0.05). The mortality of patients with 1q21 amplification was significantly higher than those without (P< 0.05). No significant difference was detected in terms of sex, age, Durie-Salmon stage, subgroup and international staging system (ISS) stage between patients with 1q21 amplification and those without (P>0.05).</p><p><b>CONCLUSION</b>The frequency of 1q21 amplification in MM is high. There was also an association between the amplification and poor prognosis. cIg-FISH is consistent with CD138 MACS combined with I-FISH.</p>

mir-17-92 cluster and tumor / 中国实验血液学杂志

MicroRNA (miRNA) is a class of RNA which has been discovered in recent years and relates with genesis and development of tumors. MiRNA affects the genesis and development of tumors and carries out the function similar to oncogene and antioncogene through regulation of signaling pathway in which target genes involved, thereby the miRNA disregulation plays an important role in oncogenesis. More studies revealed that the miR-17-19 cluster closely correlates with tumorigenesis and has bifunctional effects of oncogene and antioncogene. In this review, the mechanism and function of the miR-17-19 cluster in tumorigenesis are summarized.

Investigation of chromosome 1 aberrations in patients with multiple myeloma using cIg-FISH method and its significance / 中华血液学杂志

<p><b>OBJECTIVE</b>To investigate the incidence of 1q21 amplification and 1p12 deletion, and analyze the correlation between these aberrations with disease progression, prognosis and outcome in patients with multiple myeloma (MM).</p><p><b>METHODS</b>Cytoplasm light chain immunofluorescence with simultaneous interphase fluorescence in situ hybridization (cIg-FISH) was used to detecte the 1q21 amplification and 1p12 deletion in 48 patients with MM.</p><p><b>RESULTS</b>1q21 amplification (≥ 3 red signals) was determined in 26 of 48(54.2%) cases. The mortality of patients with 1q21 amplification was significantly higher than that of those lacking 1q21 amplification (P < 0.05). The sex, age, D-S stage, subgroup and ISS stage between patients with and without 1q21 amplification had no significant difference (P > 0.05). There was a significant difference in D-S stage and mortality between patients with 3 and with 4 copies of 1q21 (P < 0.05). No significant difference in sex, age, subgroup, ISS stage, and isotype was found between them (P > 0.05). 1p12 deletion (< 2 green signals) was found in 14 of 48 (29.2%) cases. There was no significant difference in sex, age, D-S stage, ISS stage, isotype, subgroup, and mortality between patients with and without 1p12 deletion.</p><p><b>CONCLUSION</b>The frequency of chromosome 1 aberrations in multiple myeloma is high and 1q21 amplification is a poor prognosis factor.</p>

microRNA-21 and microRNA-30b expression in multiple myeloma / 中华血液学杂志

<p><b>OBJECTIVE</b>To investigate the expression of miR-21 and miR-30b in multiple myeloma (MM).</p><p><b>METHODS</b>Peripheral blood mononuclear cells from patients with MM were cultured at 2.5 x 10(6) cells/ml in alpha-MEM supplemented with 10% of fetal bovine serum, antibiotics, RANKL (50 ng/ml), and macrophage colony-stimulating factor (25 ng/ml) for 10 to 14 days to obtain osteoclasts with bone-resorbing activity. Primary myeloma cells were purified from 12 MM patients. Of them, 8 samples were cocultured with osteoclasts and 4 as noncocultured control. The expression of miR-21 and miR-30b was detected by real-time PCR.</p><p><b>RESULTS</b>The viability of MM cells recovered from cocultures was higher than those of noncocultured control. After cocultured with osteoclasts, primary myeloma cells from eight patients exhibited a 1.3- 5.9-fold increase in miR-21 expression and 1.38- 4.32-fold decrease in miR-30b expression compared with controls. In highly purified plasma cells from 3 healthy subjects, 12 MM patients and 11 MM cell lines, the expression of miR-21 was 1.9 +/- 0.8, 6.5 +/- 4.9 and 35.1 +/- 36.2, respectively; the expression of miR-30b was 13.6 +/- 1.8, 7.2 +/- 6.3 and 4.5 +/- 1.9, respectively.</p><p><b>CONCLUSIONS</b>miR-21 acts as an oncogene and miR-30b a tumor suppressor gene in MM.</p>

Progressive transformation of lymph node germinal centers: a case report and literature review / 中华血液学杂志

<p><b>OBJECTIVE</b>To improve the understanding of progressive transformation of lymph node germinal centers (PTGC) and to explore its clinical, histopathologic and immunohistochemical features and the differential diagnosis between the related disease of germinal center hyperplasia.</p><p><b>METHODS</b>The clinical manifestation, laboratory bindings, treatment and outcome of a patient with PTGC were presented.</p><p><b>RESULTS</b>The main manifestation of the patient was painless peripheral lymphadenopathy. Histopathologic examination of an axillary lymph node showed reactive follicular hyperplasia and the progressive transformation changes germinal centers. The borderline between the germinal center and the mantle layer was obscured. The cells in the progressive transforming germinal centers were positive for CD20(+), CD5(+), CDw75(+).</p><p><b>CONCLUSION</b>PTGC is a rare lymphoid disorder. Histopathology and immunohistochemistry are important basis of the diagnosis.</p>

Investigation of the molecular changes in patients with multiple myeloma by fluorescence in situ hybridization / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To investigate the incidence and prognosis of 1q21 amplification, 13q14 deletion, TP53 gene deletion and IgH translocation in patients with multiple myeloma (MM).</p><p><b>METHODS</b>Interphase fluorescence in situ hybridization (I-FISH) with four different specific probes for the regions containing 1q21, 13q14.3 (D13S319), 14q32 and TP53 gene were performed in 43 MM patients.</p><p><b>RESULTS</b>Among the 43 MM patients, 1q21 amplification was observed in 28 (65.1%) cases, 13q14 deletion in 30 (69.7%) cases, TP53 gene deletion in 8 (18.6%) cases, and IgH translocation in 29 (67.4%) cases. The mortality of MM patients with 1q21 amplification, 13q14 deletion or TP53 gene deletion was higher than those without them.</p><p><b>CONCLUSION</b>There is high frequency of 1q21 amplification, 13q14 deletion, TP53 gene deletion and IgH translocation in multiple myeloma, and 1q21 amplification, 13q14 deletion and TP53 gene deletion are poor prognosis factors for MM patients.</p>

Correlation between chromosome 13q14 deletion and 1q abnormality in multiple myeloma / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To investigate the correlation between chromosome 13q14 deletion [del(13q14)] and chromosome 1q abnormality in multiple myeloma (MM).</p><p><b>METHODS</b>The bone marrow plasma cells of 48 previously untreated MM patients were purified by CD138 and magnetic cell sorting system, and interphase fluorescence in situ hybridization (I-FISH) was applied to detect the del(13q14) with D13S319 probe and the abnormalities of chromosome 1q with CEP1 SpectrumOrange probe in sorted MM cells.</p><p><b>RESULTS</b>Among the 48 MM patients, del(13q14) was observed in 22(45.8%) cases, the abnormalities of chromosome 1q were observed in 23 (47.9%) cases, among which 2 were 1q deletion and 21 were 1q duplication. The chromosome 1q abnormality was detected in 16 of the 22 cases of MM with del(13q14) and in 7 of the 26 cases of MM without del(13q14), and there was significant difference between the two groups (chi-square was 10.02, P was less than 0.01).</p><p><b>CONCLUSION</b>There is high frequency of chromosome 13q14 deletion and 1q abnormality in multiple myeloma. The chromosome 1q abnormalities are highly associated with 13q14 deletion.</p>