Старонка 1 ад 275 вынікі
OBJECTIVE
In vitro in the R1M cell model and in vivo in the R1M tumour-bearing athymic model, both [(123)I]-2-iodo-L: -phenylalanine and [(123)I]-2-iodo-D: -phenylalanine have shown promising results as tumour diagnostic agents for SPECT. In order to compare these two amino acid analogues and to
[123I]-iodo-L-phenylalanine was successfully evaluated for gamma camera imaging in vivo in tumor-bearing athymic mice and in humans with brain tumors. Here, we report the use of this tracer in two dogs with synovial cell sarcoma of the tarsus. [123I]-iodo-L-phenylalanine was quantitatively prepared
Between September 1976 and May 1980, 135 patients with operable breast cancer and positive axillary nodes received l-phenylalanine mustard, adjunct to surgery, 0.15 mg/kg for five days, six weekly, and were randomised prospectively to levamisole 150 mg for three days, two weekly, or a placebo.
Previous reports from this laboratory have demonstrated conclusively that cyclophosphamide administered asynchronously with Corynebacterium parvum (CP) results in greater C3H mammary tumor inhibition than that observed with either agent alone. An analysis of this combination has revelaed that the
Comparison is made of the development of resistance to cyclophosphamide (CPA) and L-phenylalanine mustard (L-PAM), of cross-resistance, and chromosome counts, in Walker 256 (W256), rat sarcoma R3 (R3), leukemia L1210, and Ridgway osteogenic sarcoma. For development of resistance the single maximum
p-[123I]iodo-L-phenylalanine (IPA) is a recently described radiopharmaceutical which is highly accumulated in gliomas. The present investigation was designed to evaluate the feasibility of single photon emission tomography (SPET) with IPA to image brain tumours under routine clinical conditions.
The aim of this work was to design, synthesize, and characterize self-assembled micelles based on polypeptides as a potential antitumor drug carrier. Amphiphilic poly(L-phenylalanine)-b-poly(L-serine) (PFS) polypeptides were obtained through the polymerization of N-carboxyanhydride. As a novel
Evidence is presented that N-benzyloxycarbonyl-L-phenylalanine vinyl ester and 1,2-dibromoethyl ester are inhibitors of Walker 256 carcinosarcoma and Ehrlich ascites carcinoma tumor growth. The major effects of these two agents on Ehrlich ascites cell metabolism were the inhibition of
The antitumor activity of delta 7-prostaglandin A1 (delta 7-PGA1) or delta 12-prostaglandin J2 (delta 12-PGJ2) on human ovarian cancer cell lines resistant to cisplatin (CDDP), doxorubicin (ADR), and L-phenylalanine mustard (l-PAM) was studied in vitro. A2780AD, A2780 (parent cells of A2780AD),
Using the triphenylmethane dye, lissamine green, as an indicator of blood perfusion, we have demonstrated that L-phenylalanine mustard (L-PAM) is differentially distributed in mice bearing mammary adenocarcinoma 16/C tumors. Following i.p. administration, concentrations of L-PAM in various regions
Introduction: Targeted α-radionuclide therapy has attracted attention as a promising therapy for refractory cancers. However, the application is limited to certain types of cancer. Since L-type amino acid transporter 1 (LAT1) is highly
Uptake of the bifunctional alkylating agent, PTT.119, p-F-Phe-m-bis-(2-chloroethyl)amino-L-Phe-Met-ethoxy-HCl, by the MJY-alpha mammary tumor and B16 melanoma cell lines occurred via two natural pathways for amino acid transport. The primary route of PTT.119 entry was the classical L System,
The toxicity of Melphalan to murine bone marrow was assessed by automated Coulter counts of femoral marrow nucleated cells. A significant dose-response slope (p less than 0.001) was shown and also a significant variation along the 24 h scale. With food available ad libitum and light from 06.00 to
The 18F-labeling of 4-borono-D-L-phenylalanine (BPA), a potential target compound for cancer treatment with boron neutron capture therapy, is described. By direct fluorination of BPA with [18F]AcOF or [18F]F2 followed by HPLC separation, 4-borono-2-[18F]fluoro-D,L-phenylalanine was prepared with
1. Despite the depletion of both their content of exchangeable endogenous amino acids and reserves of ATP, starved hypo-osmotically shocked preparations of the tumour cells accumulated relatively large amounts of (14)C-labelled 2-aminoisobutyrate, l-alanine, glycine, l-leucine, l-methionine,