snippets of info about beta carbolines,
some good,
"β-Carboline alkaloids are natural products widely distributed in plants and also found in alcoholic beverages, well-cooked foods and tobacco smoke. Various authors have reported genotoxic activities of several carboline in prokaryotic and eukaryotic cells that have been attributed to their abilities to intercalate into dna. But studies on the genotoxic and on the cytotoxic potencies in human cells in vitro are not found in the literature. In the present study the toxicities of one full aromatic β-carboline alkaloid (harmine) and one dihydro-β-carboline alkaloid (harmaline) were evaluated by means of two in vitro human cell assays: the cytochalasin-B blocked micronucleus (CBMN) assay and the viability/colony formation assay with four different human cultured non-transformed (CCD18Lu) and transformed (HeLa, C33A and SW480) cells. Neither alkaloid was able to induce micronuclei levels above that of control levels in a wide range of doses tested; although, harmine at the highest concentrations assayed induced apoptotic as well as necrotic cells. Harmine produced a good viability of all cell lines assayed (control and tumor) while harmaline significantly reduced the viability of transformed and non-transformed cell lines in a dose-dependent manner. Harmine displayed a dose-dependent inhibitory effect on cell proliferation against all human carcinoma cells, but the SW480 transformed cell line showed a higher sensitivity. These results suggested that harmine was identified as a useful inhibitor of tumor development.
and some not so good.
[FONT=Verdana,Arial,Helvetica]From the IRANIAN JOURNAL OF PHARMACOLOGY & THERAPEUTICS:
Harmine (banisterine). C13H12ON2 - It is present in P. harmala and in some species of Banisteia, viz., B. caapi, Spruce., B. lutea and B. metallicolor. The alkaloid is optically inactive and forms colorless rhombic prisms from methanol. It is slightly soluble in water, alcohol or ether. Solutions of its salts show a deep blue fluorescence. Pharmacologically, harmine resembles harmaline in its actions but is less toxic. The hydrochloride has been found to be highly active against Mycobacterium tuberculosis [7].
Harmaline (harmidine). C13H15ON2 - First isolated by Göbel [5] from the seeds and roots of P. harmala, this is the major alkaloid of this plant. It crystallizes in colorless or pale yellow prisms and is optically inactive. This compound is slightly soluble in water, alcohol and ether, quite soluble in hot alcohol and dilute acids. Its hydrochloride dihydrate, which crystallizes as yellow needles, is moderately soluble in water and alcohol. Harmaline is almost twice as toxic as harmine and in moderate doses causes tremors and clonic convulsions but with no increase in spinal reflex excitability [6]. Lethal doses bring about convulsions, which are soon followed by motor paralysis due to the marked depressive action upon the central nervous system. Respiration is paralyzed and a decrease in body temperature occurs. The perfused heart is arrested in diastolic phase and the contractions of smooth muscle are diminished with the exception of the uterus, which may be made to contract more powerfully. Over a wide range of doses there is a reduction in blood pressure due to a pronounced weakening of the heart muscle. [/FONT]
some good,
"β-Carboline alkaloids are natural products widely distributed in plants and also found in alcoholic beverages, well-cooked foods and tobacco smoke. Various authors have reported genotoxic activities of several carboline in prokaryotic and eukaryotic cells that have been attributed to their abilities to intercalate into dna. But studies on the genotoxic and on the cytotoxic potencies in human cells in vitro are not found in the literature. In the present study the toxicities of one full aromatic β-carboline alkaloid (harmine) and one dihydro-β-carboline alkaloid (harmaline) were evaluated by means of two in vitro human cell assays: the cytochalasin-B blocked micronucleus (CBMN) assay and the viability/colony formation assay with four different human cultured non-transformed (CCD18Lu) and transformed (HeLa, C33A and SW480) cells. Neither alkaloid was able to induce micronuclei levels above that of control levels in a wide range of doses tested; although, harmine at the highest concentrations assayed induced apoptotic as well as necrotic cells. Harmine produced a good viability of all cell lines assayed (control and tumor) while harmaline significantly reduced the viability of transformed and non-transformed cell lines in a dose-dependent manner. Harmine displayed a dose-dependent inhibitory effect on cell proliferation against all human carcinoma cells, but the SW480 transformed cell line showed a higher sensitivity. These results suggested that harmine was identified as a useful inhibitor of tumor development.
and some not so good.
[FONT=Verdana,Arial,Helvetica]From the IRANIAN JOURNAL OF PHARMACOLOGY & THERAPEUTICS:
Harmine (banisterine). C13H12ON2 - It is present in P. harmala and in some species of Banisteia, viz., B. caapi, Spruce., B. lutea and B. metallicolor. The alkaloid is optically inactive and forms colorless rhombic prisms from methanol. It is slightly soluble in water, alcohol or ether. Solutions of its salts show a deep blue fluorescence. Pharmacologically, harmine resembles harmaline in its actions but is less toxic. The hydrochloride has been found to be highly active against Mycobacterium tuberculosis [7].
Harmaline (harmidine). C13H15ON2 - First isolated by Göbel [5] from the seeds and roots of P. harmala, this is the major alkaloid of this plant. It crystallizes in colorless or pale yellow prisms and is optically inactive. This compound is slightly soluble in water, alcohol and ether, quite soluble in hot alcohol and dilute acids. Its hydrochloride dihydrate, which crystallizes as yellow needles, is moderately soluble in water and alcohol. Harmaline is almost twice as toxic as harmine and in moderate doses causes tremors and clonic convulsions but with no increase in spinal reflex excitability [6]. Lethal doses bring about convulsions, which are soon followed by motor paralysis due to the marked depressive action upon the central nervous system. Respiration is paralyzed and a decrease in body temperature occurs. The perfused heart is arrested in diastolic phase and the contractions of smooth muscle are diminished with the exception of the uterus, which may be made to contract more powerfully. Over a wide range of doses there is a reduction in blood pressure due to a pronounced weakening of the heart muscle. [/FONT]