Tolypothrix nodosa Tolyporphin

The unusual tolyporphin was isolated from the Pacific cyanophyte Tolypothrix nodosa and it has been shown that tolyporphin eliminates the multidrug resistance (MDR) in certain carcinoma sublines thus potentiating the cytotoxicity of anticancer drugs in these cell lines.2... 

Tolyporphyrin A from the microalga Tolypothrix nodosa reverses multidrug resistance in a Vinblastine-resistant population of human ovarian adenocarcinoma cells. In a synthesis of Tolyporphin A, four 0-benzyl groups were cleaved from the C-glycoside rings of 150.1 [Scheme 4.150] using zinc chloride and ethane-... 

The only representative of this class of compounds that is not involved in bacterial photosynthesis is the recently discovered tolyporphin 20. The unusual tolyporphin occurs in the Pacific cyanophyte tolypothrix nodosa. The substitution pattern, especially the tetrahydropyran moieties of the bacteriochlorin, is unique among naturally occurring... 

Fig. 7 Tolyporphins B-F, K found in lipophilic extracts of blue-green alga Tolypothrix nodosa...

The only naturally occurring bacteriochlorin that is not involved in photosynthesis is the tolyporphin 131 isolated by Prinsep et from the blue-green alga Tolypothrix nodosa. This compound, which enhances the cytotoxicity of adriamycin or vinblastine in SK-VLB cells at doses as low as 1 pg/ml, is characterized as a multidrug resistance-... 

Prinsep MR, Patterson GML, Larsen LK, Smith CD (1995) Further Tolyporphins from the Blue-Green Alga Tolypothrix nodosa. Tetrahedron 51 10523... 

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