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Evaluation of D-isomers of 4-borono-2-18F-fluoro-phenylalanine and O-11C-methyl-tyrosine as brain tumor imaging agents: a comparative PET study with their L-isomers in rat brain glioma.

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BACKGROUND The potential of the D-isomerization of 4-borono-2-18F-fluoro-phenylalanine (18F-FBPA) to improve its target tumor to non-target normal brain tissue ratio (TBR) was evaluated in rat brain glioma and compared with those of L- and D-11C-methyl-tyrosine (11C-CMT). The L- or D-isomer of

Synthesis and comparative biological evaluation of L- and D-isomers of 18F-labeled fluoroalkyl phenylalanine derivatives as tumor imaging agents.

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BACKGROUND L-amino acid-based tracers have established their important role as tumor metabolic imaging agents. Recently, a number of studies demonstrated that D-amino acids may have improved imaging properties than their corresponding L-isomers. We synthesized and evaluated the D-isomer of a new

123/125I-labelled 2-iodo-L: -phenylalanine and 2-iodo-D: -phenylalanine: comparative uptake in various tumour types and biodistribution in mice.

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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

Use of [123I]-2-iodo-L-phenylalanine as a tumor imaging agent in two dogs with synovial cell sarcoma.

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[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

Levamisole in primary breast cancer. A controlled study in conjunction with l-phenylalanine mustard.

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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.

The effect of Corynebacterium parvum in combination with 5-fluorouracil, L-phenylalanine mustard, or methotrexate on the inhibition of tumor growth.

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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

Resistance patterns of Walker carcinosarcoma 256 and other rodent tumors to cyclophosphamide and L-phenylalanine mustard.

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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

Radioiodinated phenylalanine derivatives to image pancreatic cancer: a comparative study with [18F]fluoro-2-deoxy-D-glucose in human pancreatic carcinoma xenografts and in inflammation models.

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This work validated an in vivo model of human pancreatic cancer for preclinical studies and evaluated p-amino-3-[123I]iodo-L-phenylalanine (AIPA) and p-[123I]iodo-L-phenylalanine (IPA) as potential imaging agents for pancreatic cancer. The primary human pancreatic adenocarcinoma PaCa44 and PanC1

Initial evaluation of the feasibility of single photon emission tomography with p-[123 I]iodo-L-phenylalanine for routine brain tumour imaging.

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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.

Preliminary in vivo evaluation of [131I]-2-iodo-D-phenylalanine as a potential radionuclide therapeutic agent in R1M-fluc rhabdomyosarcoma tumor-bearing NuNu mice using bioluminescent imaging.

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BACKGROUND Carrier-added [(123)I]-2-iodo-D-phenylalanine (CA [(123)I]-2-I-D-Phe) was previously found to have a preferential retention in tumors with a high tumor background contrast in animal models. A previous human dosimetry study demonstrated a favorable biodistribution and radiation burden in

Mechanisms of growth inhibition in human papillomavirus positive and negative cervical cancer cells by the chloromethyl ketone protease inhibitor, succinyl-alanine-alanine-proline-phenylalanine chloromethyl ketone.

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The chymotrypsin-like serine protease inhibitor, succinyl-alanine-alanine-proline-phenylalanine chloromethyl ketone (AAPF(CMK)), has been shown to have anticarcinogenic activity in a number of model systems and to be relatively selective for a nuclear protease. This inhibitor also has substantial

Self-assembled micelles of amphiphilic poly(L-phenylalanine)-b-poly(L-serine) polypeptides for tumor-targeted delivery.

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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

Antineoplastic agents III: effects of dibromoethyl and vinyl esters of N-benzyloxycarbonyl-l-phenylalanine on Ehrlich ascites tumor cell metabolism.

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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

Human ovarian cancer cell lines resistant to cisplatin, doxorubicin, and L-phenylalanine mustard are sensitive to delta 7-prostaglandin A1 and delta 12-prostaglandin J2.

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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),

Thermosensitive Micelles Encapsulating Phenylalanine Ammonia Lyase Act as a Sustained and Efficacious Therapy Against Colorectal Cancer.

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Colorectal cancer has become the third most commonly diagnosed cancer worldwide, which has posed challenges to current conventional therapies. Hence, we propose an alternative approach to the existing therapeutics for colorectal cancer treatment. In this work, we prepared thermosensitive micelles

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