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Synthesis and antitumor activity of new alkylphospholipids containing modifications of the phosphocholine moiety.

Abstract：

:New antitumor alkylglycerophospholipids, in which primarily the phosphocholine moiety of the platelet activating factor (PAF) molecule was modified, were synthesized from 1-alkyl-2-substituted glycerols by introducing polar head phosphoryl groups having methylene bridges of various lengths (from 2 to 14 carbons). They were tested for PAF agonistic activity and antitumor properties. In a series of 1-octadecyl-2-acetoacetylglycerophospholipids (1a-f), an increase in the length of the methylene bridge separating the phosphate and trimethylammonio group in the polar head side chain at position 3 of the glycerol backbone resulted in a progressive decrease in PAF agonistic activity and a characteristic change in antitumor activity against human promyelocytic leukemia cells (HL-60). Maximal potency was obtained with the compound having a decamethylene bridge (1e, IC50 value = 1.5 microgram/ml). Thus, alkylphospholipids possessing a decamethylene bridge and a variety of substituents at position 2 (1g-n) were synthesized. They showed potent inhibitory activity with IC50 values ranging from 0.4 to 1.9 micrograms/ml, depending on the nature of the 2-substituent in the phospholipid molecule. In in vivo tests of the present series of alkylglycerophospholipids (1a--n), using mice bearing sarcoma 180 and mice with mammary carcinoma MM46 (both cells and compounds were given i.p.), 1-octadecyl-2-acetoacetyl-3-glyceryl omega-trimethylammoniodecyl phosphate (1e) showed the most potent life-prolonging effect. The structure-activity relationships are discussed.

journal_name

Chem Pharm Bull (Tokyo)

journal_title

Chemical & pharmaceutical bulletin

authors

Ukawa K,Imamiya E,Yamamoto H,Mizuno K,Tasaka A,Terashita Z,Okutani T,Nomura H,Kasukabe T,Hozumi M

doi

10.1248/cpb.37.1249

subject

Has Abstract,Author List Incomplete

pub_date

1989-05-01 00:00:00

pages

1249-55

issue

5

eissn

0009-2363

issn

1347-5223

journal_volume

37

pub_type

杂志文章

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