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Sixty-two patients with refractory ovarian carcinoma or other malignancies principally confined to the peritoneal cavity were treated with an intraperitoneal combination chemotherapy regimen consisting of cisplatin (100 mg/m2 or 200 mg/m2) and cytosine arabinoside (4 X 10(-3) mol/L or 10(-2) mol/L).
The recent elucidation of crystal structures of a bacterial member of the NCS1 family, the Mhp1 benzyl-hydantoin permease from Microbacterium liquefaciens, allowed us to construct and validate a three-dimensional model of the Aspergillus nidulans purine-cytosine/H(+) FcyB symporter. The model
Thirty-one patients with refractory ovarian cancer and other malignancies principally confined to the abdominal cavity were treated with an intraperitoneal combination-chemotherapy regimen consisting of cisplatin (100 to 200 mg/m2), cytosine arabinoside (10(-4) to 10(-3) mol/L) and doxorubicin (2 to
Ovarian cancer tends to remain confined to the peritoneal cavity even after widespread dissemination. In order to test the in vitro cytotoxic effect of cis-platinum (CP) and cytosine arabinoside (ara-C), a combination which, in theory, is particularly suitable for intraperitoneal (IP)
Thirty-three patients with microscopically verified primary or metastatic malignant pleural effusion were studied: 7 had malignant mesothelioma and 26 metastatic pleural disease. The treatment was based on biochemical and clinical studies which show a synergy between cytosine-arabinoside (Ara-C) and
The expression of therapeutic transgenes in recombinant adenoviral vectors is a major cause of toxicity in dividing cancer cells as well as non dividing normal cells. To solve the problem of toxicity to normal cells, we have reported on a recombinant adenoviral vector system (AdLP-) in which the
The single crystal structure of the methylated sequence d(CCGGTACm(5)CGG) has been solved as an antiparallel stacked X Holliday junction to 1.5 A resolution. When compared with the parent nonmethylated d(CCGGTACCGG) structure, the duplexes are translated by 3.4 A along the helix axis and rotated by
Liposomes containing cytosine arabinoside (ara-C) release drug slowly and can be used to maintain a locally high concentration of ara-C in the peritoneal cavity for intracavitary chemotherapy. However, a significant amount of active drug does reach the systemic circulation and contributes to
Suckling mice were injectd with 30 or 50 mg cytosine arabinoside/kg body weight 2, 3 and 4 days after birth. Within 6 h after the first injection, a number of pyknotic nuclei were found at the inner portion of the undifferentiated nuclear layer of the retinas. 24 h after the final injection, the
Pre-steady state partitioning analysis of the HhaI DNA methyltransferase directly demonstrates the catalytic competence of the enzyme.DNA complex and the lack of catalytic competence of the enzyme.S-adenosyl-L-methionine (AdoMet) complex. The enzyme.AdoMet complex does form, albeit with a 50-fold
A new tumor model is described that is suitable for the evaluation of antibody-directed drug-delivery protocols and a modification in the procedure for covalently coupling antibody to the surface of drug-containing liposomes is presented. These immunospecific liposomes containing cytosine
Free [14C]cytosine beta-D-arabinofuranoside ([14C]ara-C) was completely absorbed from the peritoneal cavity of thoracic duct-cannulated rats by 6 hr after ip dosing. 14C levels in most tissues were higher at 4 hr than at 12 hr after dosing and were generally undetectable at 24 hr. By 6 hr after
Experiments were conducted with biodegradable microspheres containing antimetabolites to assess the release of the drugs from the microspheres into the vitreous cavity of primates. Microspheres containing a mixture of radiolabeled and cold cytosine arabinoside (Ara-C) or 5-fluorouracil (5-FU) were
Forty-nine strains of the gliding prokaryote Simonsiella were isolated from the oral cavities of cats (8), dogs (19), sheep (4), and humans (18) in Southern California by a direct isolation procedure using a complex serum-enriched medium. The numerical taxonomic analysis (unweighted pair-group
We have carried out B3LYP hybrid density functional studies of complexes formed by cyclic cytosine-, guanine-, thymine-, uracil- and mixed guanine cytosine-tetrads with Li+, Na+ and K+ ions to determine their structures and interaction energies. The conformations studied have been restricted to a