Relationships between DNA methylation and expression in erythrocyte membrane protein (band 3, protein 4.2, and beta-spectrin) genes during human erythroid development and differentiation.

Red cell membrane proteins are sequentially expressed during erythroid development and differentiation. Spectrins have already been synthesized in early erythroid precursors such as pronormoblasts, and band 3 (B3) appears at nearly the same stage. Protein 4.

DNA methylation in promoter regions of red cell membrane protein genes in healthy individuals and patients with hereditary membrane disorders.

The methylation state of 5'-CG-3' sites is known to be linked to the regulation of promoter function by modulating DNA-protein interactions and to the structure of chromatin. As part of a project to determine methylation patterns in the human genome, we examined the methylation profiles of several genes for human erythroid membrane proteins: ELB42 (protein 4.2), EPB3 (band 3), SPTB gene (beta-spectrin), and ANK1 (ankyrin).

Multiple myeloma complicated by autoimmune hemolytic anemia.

A 57-year-old man was admitted with severe anemia and hypergamma globulinemia. After a diagnosis of multiple myeloma and autoimmune hemolytic anemia was made, chemotherapy rapidly decreased the M-protein level and improved his anemia with normalization of the direct Coombs test. The immunoglobulin binding to the patient's red cells was immunoglobulin G kappa chain like the myeloma M-protein.

Diagnostic significance of serum soluble transferrin receptors in various anemic diseases: the first multi-institutional joint study in Japan.

Serum soluble transferrin receptor (sTfR) has been reported to be higher in patients with iron deficiency or with elevated erythropoiesis. In the present study, serum sTfR was measured in various anemic diseases and their clinical significance was examined in a multi-institutional joint study. Serum sTfRs in patients with the following anemic diseases were markedly higher than those in normal healthy adults: non-treated iron deficiency anemia (IDA) (9.

Expression of angiogenic factors including VEGFs and the effects of hypoxia and thalidomide on human myeloma cells.

Angiogenic factors are major causes of tumor progression in hematological malignancies, particularly multiple myeloma, as well as solid tumors. The introduction of thalidomide as an anti-angiogenic agent in myeloma treatment has demonstrated the importance of angiogenic factors in the progression of myeloma. However, the direct effects of angiogenic factors, particularly VEGFs, hypoxia, and thalidomide, on myeloma cells are not been documented.

[Seven patients with stage I and II primary testicular lymphoma].

Seven patients with stage I and II primary testicular lymphoma (PTL) have been treated since 1990 to the present at Kawasaki Medical School. All patients, whose median age was 56 yrs, had initially complained of swelling of the scrotal contents. The lesions were on the right in two patients, on the left in five, and no patient had bilateral lesions.

Synergistic growth inhibition of YM529 with biologic response modifiers (BRMs) in myeloma cells.

Bisphosphonates (BPs) are effective in the management of bone disease in patients with multiple myeloma. Recent reports have suggested that they may also have an antitumor activity. YM529 is a new synthetic BP with more than 1000 times the bone resorption inhibitory activity of pamidronate.

[Pneumonitis with a bronchiolitis obliterans organizing pneumonia-like shadow in a patient with human herpes virus-6 viremia after allogeneic bone marrow transplantation].

We report the case of a 42-year-old male who underwent allogeneic bone marrow transplantation (BMT) for acute myelogenous leukemia, and then developed pneumonitis with a bronchiolitis obliterans organizing pneumonia (BOOP)-like shadow. When he came with exertional dyspnea four months after BMT, the chest X-ray and CT findings disclosed bilateral infiltration, and remarkable elevation of his serum KL-6 level, a monitoring marker for disease activity in interstitial lung disease. Although organizing pneumonia (OP) was revealed by a transbronchial lung biopsy, no pathogen was detected in bacterial, fungal and routine viral cultures or by direct cytological examinations using bronchoalveolar lavage (BAL) specimens.

Interleukin 10 abolishes the growth inhibitory effects of all-trans retinoic acid on human myeloma cells.

Recently, it was disclosed that all-trans retinoic acid (ATRA) inhibits myeloma cell growth by downregulating the interleukin 6 (IL-6)/IL-6 receptor (IL-6R) auto/paracrine loop, and upregulating p21/Cip1 cyclin-dependent kinase inhibitor (CDK-I), thereby inducing apoptosis with a decrease in Bcl-2 protein expression. To elucidate and generalize the effects of ATRA on the proliferation and cellular biology of myeloma cells, 12 human myeloma cell lines established in our laboratory were utilized. Two out of the 12 lines showed enhanced growth on supplementation of ATRA and were characterized by IL-10 production, downregulation of membrane Fas and reduced upregulation of p21/Cip1 CDK-I message.

[Acute myelogenous leukemia associated with severe esophageal stricture after chemotherapy].

A 41-year-old woman with relapsed acute myelogenous leukemia was treated twice with idarubicin hydrochloride and cytarabine. She developed a 6-cm-long stricture in the lower esophagus 12 days after re-induction therapy. Although she had preceding candida infection, it is suspected that her stricture was caused by mucosal damage due to chemotherapeutic agents.