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Biomedical subjects

B Blom

Publications and source records attributed to B Blom.

26 records · Page 2Linked to original sources
PubMed1993

Cloning and expression of murine CD27: comparison with 4-1BB, another lymphocyte-specific member of the nerve growth factor receptor family.

CD27 is a member of the nerve growth factor receptor family, that includes two types of tumor necrosis factor receptor, CD40 and Fas/Apo-1. Human CD27 has been found only on lymphocytes. In T cells, its expression strongly increases in a transient fashion upon antigenic stimulation, suggesting that CD27 plays a role during T cell activation. To analyze the function of CD27, we have identified the murine CD27 at the cDNA and protein level. Murine CD27 shows an identity of 65% compared with human CD27. The amino-terminal cysteine-rich region, i.e. the putative ligand-binding domain, and the carboxy-terminal part of the cytoplasmic domain are approximately 80% identical in man and mouse. Murine CD27 has 29% identity to 4-1BB, another lymphocyte-specific member of the receptor family defined only at the cDNA level. Murine CD27 and 4-1BB have 39% homology in the cysteine-rich domain and share a conserved region in the cytoplasmic tail. Expression studies identified murine CD27 mRNA in thymus and spleen, but not in non-lymphoid tissues, while 4-1BB mRNA was not detected in any tissue tested. In resting T cells, only murine CD27 mRNA was found, while in activated T cells murine CD27 as well as 4-1BB were present at high levels. Murine CD27 and 4-1BB mRNA are expressed with different kinetics during T cell activation, suggesting that these molecules play different roles in this process. Peptide antisera identified murine CD27 as a 45-kDa protein on thymocytes and activated T cells, while 4-1BB was precipitated as a 35-40-kDa protein from activated T cells.

Amino Acid Sequence↗
PubMed1981

Bone marrow transplantation for aplastic anemia and acute leukemia at Huddinge Hospital.

Eight patients with aplastic anemia were transplanted with marrow from HLA-identical donors. Two patient rejected their grafts and died while 5 patients (71%) show no ill effects 3 months, 10 months, and more than 1, 2 and 4 years after the transplantation. Three of the patients who received unirradiated donor buffy coat after transplantation developed chronic graft-versus-host disease (GVHD) which, however, resolved following treatment with Prednisolone and Azathioprine. One patient with end-stage acute myeloid leukemia, who was transplanted with marrow from an identical twin, died 6 days after the transplantation of bleedings and sepsis. Eight patients with acute non-lymphoblastic leukemia (ANL) were transplanted, while in remission, with marrow from HLA-identical siblings. One patient died of interstitial pneumonia 3 months after transplantation, while another patient recovered from GVHD of the gut at 5 months after the transplantation. Seven out of 8 patients with ANL (88%) are home and well between 2 and 12 months after the transplantation.

Acute Disease↗
PubMed1977

Treatment of progressive systemic sclerosis (scleroderma, PSS) with a new drug influencing connective tissue.

Cyclofenil is a new diphenyl ethylene derivative related to stilboestrol without oestrogenicity but with marked effects on connective tissue metabolism. The drug has been tested, in a daily dose of 200mg X3, in six patients with progressive systemic sclerosis (PSS) to analyze the expected beneficial effects on the PSS symptoms. The typical skin hardness, joint and muscle rigidity, and reduced breathing capacity were improved to varying dgrees. The only side-effect was a slight transient liver enzyme elevation in 1 out of 6 patients. A slight increase was found in urinary calcium and hydroxyproline excretion. In several cases serum calcium, cholesterol, triglyceride and in some cases the serum uric acid levels were decreased. The ANF titres diminished to varying degrees in 4 out of 6 patients. These results indicate that further detailed clinical and laboratory studies on the therapeutic potential of cyclofenil in PSS and other diseases affecting connective tissue seen to be justified.

Administration, Oral↗