Pericentromeric Non-Coding DNA Transcription Is Associated with Niche Impairment in Patients with Ineffective or Partially Effective Multiple Myeloma Treatment.

Mesenchymal stromal cells (MSC) 'educated' by tumor cells are an essential component of the multiple myeloma (MM) tumor microenvironment (TME) involved in tumor progression. Transcription of tandemly repeated (TR) non-coding DNA is often activated in many tumors and is required for tumor progression and cancer cells genome reorganization. The aim of the work was to study functional properties including the TR DNA transcription profile of MSC from the hematopoietic niche of treated MM patients.

[The combination of chronic myeloid leukemia and multiple myeloma in one patient].

The article describes the clinical observation of a patient with simultaneous course of lymphoid and myeloid neoplasms. The patient developed two diseases--chronic myeloid leukemia (CML) and multiple myeloma (MM), which were confirmed by corroborated hemogram, myelogram, immunophenotyping of bone marrow cells, biopsy, immunohistochemical, cytogenetic, biochemical and radiological studies. Target therapy of CML with tyrosine kinase inhibitors (imatinib at the standard dose of 400 mg per day) has provided a complete cytogenetic remission at 6 months and major molecular response at 18 months of treatment.

[Clinical biological features of mixed myeloid diseases].

Aim: To characterize patients with mixed myeloid neoplasias with proliferation of neutrophils, platelets and eosinophils.

Material And Methods: Examination and treatment results were analysed for patients with atypical myeloid leukemia (n = 4), myelodysplastic syndrome (MDS, n = 1) and thrombocytosis, MDS and eosinophilia (n = 1). The examination included morphological, histological, cytogenetic and molecular tests.

[Structural and functional changes of bone marrow stroma in chronic lymphocytic leukemia].

Marrow stroma was investigated in 20 patients with chronic lymphocytic leukemia (CLL). Such morphological and functional features as adipose tissue reduction, sinusoid pattern obliteration and increased number of reticular cells were identified as typical of marrow stroma in such patients. Foci of fibrosis, nuclear bodies in stromal cell nuclei and heightened proliferation of stromal precursors in organ cultures were recorded in the subendostal and perivascular areas in 60% of patients with diffuse lesions of bone marrow.