2 thiouracil/neoplasms

2-Thiouracil (TU), an antithyroid drug, is receiving growing interest as a specific tumor marker for malignant melanoma, owing to its capability of being selectively accumulated into active melanin-producing tissues. However, up until now, the molecular mechanism of TU uptake by growing melanin has

2-Thiouracil (TU), an antithyroid drug, is generally recognized as a highly specific melanoma seeker owing to its capability of being selectively accumulated into active melanin-producing tissues. We recently reported evidence that in vitro TU is capable of reacting with dopaquinone (DQ), an early

Many epidemiologic studies have shown that the exposure to high external radiation doses increases thyroid neoplastic frequency, especially when given during childhood or adolescence. The use of radioprotective drugs may decrease the damage caused by radiation therapy and therefore could be useful

In normal tissues, thyroid hormones play a major role in the metabolic activity and oxygen consumption of cells. Because the rate of oxygen consumption is a key factor in the response of tumors to radiation, we hypothesized that thyroid hormones may affect the metabolic activity of tumor cells and

Thiouracil (TU) selectively binds to the pigment melanin during melanogenesis and is rapidly cleared from normal tissues. This compound shows little affinity for pre-formed melanin. BALB/c mice, carrying the subcutaneously transplanted Harding-Passey melanoma, were given i.p. injections of

Metal complexes of 5-carboxy-2-thiouracil with Mn(ll), Co(ll), Ni(ll), Cu(ll), Zn(ll) and Cd(ll) ions were synthesized, characterized, and subjected to a screening system for evaluation of antitumour activity against Sarcoma-180 (S-180) tumour cells. The complexes were characterized by elemental

5-Carbethoxy-2-thiouracil (eitotH2) reacts with copper(I) halides CuX (X = Cl, Br, I) to give dinuclear complexes of the formula [CuX(eitotH2)2]2 while mononuclear mixed-ligand complexes of the formula [CuX(PPh3)2(eitotH2)] result when the reactions are performed in the presence of two equivalents

A convenient synthesis of 5-fluoro-2-thiouracil (11) is based on hydrolytic deamination of 5-fluoro-2-thiocytosine (9). Lewis acid-catalyzed condensation of di-TMS-5-fluoro-2-thiouracil (13) or di-TMS-2-thiouracil (14) with 2-deoxy-3,5-di-O-p-toluyl-D-ribofuranosyl chloride (15) led to mixtures of

A series of 2,5,7-trisubstituted pyrimido[4,5-d]pyrimidine cyclin-dependent kinase (CDK2) inhibitors is designed and synthesized. 6-Amino-2-thiouracil is reacted with an aldehyde and thiourea to prepare the pyrimido[4,5-d]-pyrimidines. Alkylation and amination of the latter ones give different amino

METHODS Several anecdotal reports indicate that cancer may occasionally remain in a dormant state for prolonged periods in patients with hypothyroidism. Once the hypothyroid state is recognized and supplementation therapy with thyroid hormones is initiated, disease progression occurs. In this

The tissue distribution of a number of 5-[131I]-iodo-2-thiouracil derivatives was measured in Syrian golden hamsters with Greene melanoma. These compounds were rapidly (in less than 1 h) distributed in all tissues, while in most tissues fast elimination (T1/2 1-3 h) was observed. Because of

This paper describes factorial experiments designed to determine whether two carcinogens that lead to cancers in different organ systems act synergistically to produce cancers in Fischer 344 rats. Four carcinogens, aflatoxin B1 (AFLA), N-butyl-n-(4-hydroxybutyl)nitrosamine (NBBN), lead acetate (LA),

New thiolate gold(i) complexes with P(NMe2)3 (HMPT) as a phosphane group [Au(SR)(HMPT)] (SR = Spy, Spyrim, SMe2pyrim, Sbenzothiazole, Sthiazoline, Sbenzimidazole and 2-thiouracil) have been synthesized. All of them have been characterized, including X-ray studies of complexes with SMe2pyrim,

Several novel 6-aryl-5-cyano thiouracil derivatives were synthesized and explored for their activities as antibacterial, antifungal and anticancer agents. The antimicrobial evaluation revealed that compounds 7b and 7c possessed superior antibacterial activity against the Gram positive bacteria S.