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Matti Narkia

Retinol-induced Intestinal Tumorigenesis in Min/+ Mice and Importance of Vitamin D Stat... - 0 views

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    "Retinol-induced Intestinal Tumorigenesis in Min/+ Mice and Importance of Vitamin D Status.
    Hetland RB, Alexander J, Berg JP, Svendsen C, Paulsen JE.
    Anticancer Res. 2009 Nov;29(11):4353-60.
    PMID: 20032378

    The effects of life-long dietary exposure, starting in utero, to high retinol, low vitamin D, or high retinol in combination with low vitamin D on intestinal tumorigenesis in Min/+ mice were investigated. In males, high retinol alone significantly increased the number (2.6-fold) and size (1.3-fold) of small intestinal tumours; in females no significant increase in tumour number or size was seen. In both genders, low vitamin D intake alone did not affect intestinal tumorigenesis. In males, intake of the combined high retinol/low vitamin D diet did not further increase the effects caused by high retinol alone. In females, however, the high retinol/low vitamin D-induced increase in tumour number (3.1-fold) and tumour size (1.5-fold) exceeded that of high retinol alone. In conclusion, a high dietary intake of retinol stimulated intestinal tumorigenesis in Min/+ mice. Furthermore, the results indicate a combined effect of high retinol and low vitamin D on tumorigenesis in females"
Matti Narkia

Anticancer Properties of Ganoderma Lucidum Methanol Extracts In Vitro and In Vivo - Nut... - 0 views

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    Anticancer properties of Ganoderma lucidum methanol extracts in vitro and in vivo.
    Harhaji Trajković LM, Mijatović SA, Maksimović-Ivanić DD, Stojanović ID, Momcilović MB, Tufegdzić SJ, Maksimović VM, Marjanović ZS, Stosić-Grujicić SD.
    Nutr Cancer. 2009;61(5):696-707.
    PMID: 19838944
    DOI: 10.1080/01635580902898743

    Anticancer activities of various extracts of the medicinal mushroom, Ganoderma lucidum, have been widely demonstrated and are mainly associated with the presence of different bioactive polysaccharides and triterpenoids. We have evaluated and compared in vitro and in vivo the antitumor effects of two preparations from Ganoderma lucidum: a methanol extract containing total terpenoids (GLme) and a purified methanol extract containing mainly acidic terpenoids (GLpme). Both extracts inhibited tumor growth of B16 mouse melanoma cells inoculated subcutaneously into syngeneic C57BL/6 mice and reduced viability of B16 cells in vitro, whereby GLme exhibited stronger effect. Furthermore, anticancer activity of GLme was demonstrated for the first time against two other rodent tumor cell lines, L929-mouse fibrosarcoma and C6-rat astrocytoma. The mechanism of antitumor activity of GLme comprised inhibition of cell proliferation and induction of caspase-dependent apoptotic cell death mediated by upregulated p53 and inhibited Bcl-2 expression. Moreover, the antitumor effect of the GLme was associated with intensified production of reactive oxygen species, whereas their neutralization by the antioxidant, N-acetyl cysteine, resulted in partial recovery of cell viability. Thus, our results suggest that GLme might be a good candidate for treatment of diverse forms of cancers.
Matti Narkia

Berberine - a novel approach to cholesterol lowering; Expert Opinion on Investigational... - 0 views

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    Berberine--a novel approach to cholesterol lowering.
    Doggrell SA.
    Expert Opin Investig Drugs. 2005 May;14(5):683-5.
    PMID: 15926873
Matti Narkia

Coconut kernel protein modifies the effect of coconut oil on serum lipids. - Plant Food... - 0 views

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    Coconut kernel protein modifies the effect of coconut oil on serum lipids.
    Padmakumaran Nair KG, Rajamohan T, Kurup PA.
    Plant Foods Hum Nutr. 1999;53(2):133-44.
    PMID: 10472790
    DOI: 10.1023/A:1008078103299

    Feeding coconut kernel along with coconut oil in human volunteers has been found to reduce serum total and LDL cholesterol when compared to feeding coconut oil alone. This effect of the kernel was also observed in rats. Since many plant proteins have been reported to exert a cholesterol lowering effect, a study was carried out on the effect of isolated kernel protein in rats. Feeding kernel protein resulted in lower levels of cholesterol, phospholipids and triglycerides in the serum and most tissues when compared to casein fed animals. Rats fed kernel protein had (1) increased hepatic degradation of cholesterol to bile acids, (2) increased hepatic cholesterol biosynthesis, and (3) decreased esterification of free cholesterol. In the intestine, however, cholesterogenesis was decreased. The kernel protein also caused decreased lipogenesis in the liver and intestine. This beneficial effect of the kernel protein is attributed to its very low lysine/arginine ratio 2.13% lysine and 24.5% arginine....
Matti Narkia

Beneficial effects of virgin coconut oil on lipid parameters and in vitro LDL oxidation... - 0 views

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    Beneficial effects of virgin coconut oil on lipid parameters and in vitro LDL oxidation.
    Nevin KG, Rajamohan T.
    Clin Biochem. 2004 Sep;37(9):830-5.
    PMID: 15329324
    doi:10.1016/j.clinbiochem.2004.04.010

    Conclusion: The results demonstrated the potential beneficiary effect of virgin coconut oil in lowering lipid levels in serum and tissues and LDL oxidation by physiological oxidants. This property of VCO may be attributed to the biologically active polyphenol components present in the oil
Matti Narkia

Tissue Phylloquinone and Menaquinones in Rats Are Affected by Age and Gender -- Huber e... - 0 views

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    Tissue phylloquinone and menaquinones in rats are affected by age and gender.
    Huber AM, Davidson KW, O'Brien-Morse ME, Sadowski JA.
    J Nutr. 1999 May;129(5):1039-44.
    PMID: 10222397

    The results suggest that in extrahepatic tissues, certain menaquinones may be the predominant form of vitamin K. The specific tissue distribution and the general decline of MK-4 and MK-6 in extrahepatic tissues during aging suggest a vitamin K tissue dynamic that is affected not only by diet, but also by gender, age and the specific roles of phylloquinone, MK-4 and MK-6 in metabolism. All of these factors must be taken into account in establishing the nutrient requirement for vitamin K.
Matti Narkia

Age and Dietary Form of Vitamin K Affect Menaquinone-4 Concentrations in Male Fischer 3... - 0 views

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    Age and dietary form of vitamin K affect menaquinone-4 concentrations in male Fischer 344 rats.
    Booth SL, Peterson JW, Smith D, Shea MK, Chamberland J, Crivello N.
    J Nutr. 2008 Mar;138(3):492-6.
    PMID: 18287355

    These data suggest that dihydrophylloquinone, which differs from phylloquinone in its side phytyl chain, is absorbed but its intake results in less MK-4 in certain tissues. Dihydrophylloquinone may be used in models for the study of tissue-specific vitamin K deficiency
Matti Narkia

Conversion of Phylloquinone (Vitamin K1) into Menaquinone-4 (Vitamin K2) in Mice - JBC - 0 views

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    Conversion of phylloquinone (Vitamin K1) into menaquinone-4 (Vitamin K2) in mice: two possible routes for menaquinone-4 accumulation in cerebra of mice.\nOkano T, Shimomura Y, Yamane M, Suhara Y, Kamao M, Sugiura M, Nakagawa K.\nJ Biol Chem. 2008 Apr 25;283(17):11270-9. Epub 2007 Dec 14. \nPMID: 18083713 \ndoi: 10.1074/jbc.M702971200 \n\nOur results suggest that cerebral menaquinone-4 originates from phylloquinone intake and that there are two routes of accumulation, one is the release of menadione from phylloquinone in the intestine followed by the prenylation of menadione into menaquinone-4 in tissues, and another is cleavage and prenylation within the cerebrum.
Matti Narkia

Conversion of Dietary Phylloquinone to Tissue Menaquinone-4 in Rats is Not Dependent on... - 0 views

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    Conversion of dietary phylloquinone to tissue menaquinone-4 in rats is not dependent on gut bacteria.
    Davidson RT, Foley AL, Engelke JA, Suttie JW.
    J Nutr. 1998 Feb;128(2):220-3.
    PMID: 9446847

    These data offer conclusive proof that the tissue-specific formation of MK-4 from K is a metabolic transformation that does not require bacterial transformation to menadione as an intermediate in the process
Matti Narkia

Berberine inhibits adipogenesis in high-fat diet-induced obesity mice - ScienceDirect -... - 0 views

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    Berberine inhibits adipogenesis in high-fat diet-induced obesity mice.
    Hu Y, Davies GE.
    Fitoterapia. 2009 Oct 25. [Epub ahead of print]
    PMID: 19861153
    doi:10.1016/j.fitote.2009.10.010

    Our previous studies illustrated that berberine inhibited adipogenesis in murine-derived 3T3-L1 preadipocytes and human white preadipocytes. In this study, the effects of berberine on the adipogenesis of high-fat diet-induced obesity (FD) or normal diet (ND) mice and possible transcriptional impact are investigated. The results demonstrated that in FD mice, berberine reduced mouse weight gain and food intake and serum glucose, triglyceride, and total cholesterol levels accompanied with a down-regulation of PPARgamma expression and an up-regulation of GATA-3 expression. Berberine had no adverse effects on ND mice. These encouraging findings suggest that berberine has excellent pharmacological potential to prevent obesity.
Matti Narkia

Neuroprotective effects of berberine on stroke models in vitro and in vivo - ScienceDir... - 0 views

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    Neuroprotective effects of berberine on stroke models in vitro and in vivo.
    Zhou XQ, Zeng XN, Kong H, Sun XL.
    Neurosci Lett. 2008 Dec 5;447(1):31-6. Epub 2008 Sep 30.
    PMID: 18838103
    doi:10.1016/j.neulet.2008.09.064

    Findings of this study suggest that berberine protects against ischemic brain injury by decreasing the intracellular ROS level and subsequently inhibiting mitochondrial apoptotic pathway.
Matti Narkia

Berberine reduces the hypoxic-ischemic insult in rat pup brain. - Akadémiai K... - 0 views

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    Berberine reduces the hypoxic-ischemic insult in rat pup brain.
    Benaissa F, Mohseni-Rad H, Rahimi-Moghaddam P, Mahmoudian M.
    Acta Physiol Hung. 2009 Jun;96(2):213-20.
    PMID: 19457765
    DOI: 10.1556/APhysiol.96.2009.2.6

    Pathologic review of the samples obtained from rats treated with different doses of berberine in comparison with samples from pups treated by normal saline showed that there was a significant reduction of brain injury and edema in the rats treated with berberine. Our study also demonstrates that berberine reduces brain ischemic-hypoxic injury dose-dependently. Therefore, beberine may be considered as useful anti-stroke agent.
Matti Narkia

[Vitamin K and Bone Update. In vivo Metabolism of Vitamin K. - In relation to the conve... - 0 views

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    [Vitamin K and Bone Update. In vivo Metabolism of Vitamin K. - In relation to the conversion of vitamin K(1) to MK-4 -]
    Okano T, Nakagawa K, Kamao M.
    Clin Calcium. 2009 Dec;19(12):1779-87. Japanese.
    PMID: 19949269

    Phylloquinone is a major form (>90%) of dietary vitamin K, but the form of vitamin K that exists at the highest concentrations in tissues of animals and humans is menaquinone-4 (MK-4) . Despite this great difference, the origin of tissue MK-4 had not been clarified until recently. We demonstrated that deuterium-labeled phylloquinone was converted into deuterium-labeled MK-4 in mice and this conversion occurred following an oral or enteral administration, but not parenteral administration. By the oral route, the phylloquinone with the deuterium-labeled side chain (phytyl side-chain) was clearly converted into menaquinone-4 with a non-deuterium-labeled side chain (geranylgeranyl side-chain) , implying that phylloquinone was converted into menaquinone-4 via integral side-chain removal. Our results suggest that cerebral menaquinone-4 originates from phylloquinone intake and the release of menadione from phylloquinone in the intestine followed by the prenylation of menadione into menaquinone-4 in the intestine or tissues
Matti Narkia

Effect of vitamin K2 (menaquinone-7) in fermented soybean (natto) on bone loss in ovari... - 0 views

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    Effect of vitamin K2 (menaquinone-7) in fermented soybean (natto) on bone loss in ovariectomized rats.
    Yamaguchi M, Taguchi H, Gao YH, Igarashi A, Tsukamoto Y.
    J Bone Miner Metab. 1999;17(1):23-9.
    PMID: 10084398

    This study demonstrates that the intake of dietary MK-7 has a preventive effect on bone loss caused by OVX. This effect may be partly caused by MK-4, which is formed by degradation of MK-7.
Matti Narkia

Berberine inhibits human tongue squamous carcinoma cancer tumor growth in a murine xeno... - 0 views

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    Berberine inhibits human tongue squamous carcinoma cancer tumor growth in a murine xenograft model.
    Ho YT, Yang JS, Lu CC, Chiang JH, Li TC, Lin JJ, Lai KC, Liao CL, Lin JG, Chung JG.
    Phytomedicine. 2009 Sep;16(9):887-90. Epub 2009 Mar 20.
    PMID: 19303753

    Our primary studies showed that berberine induced apoptosis in human tongue cancer SCC-4 cells in vitro. But there is no report to show berberine inhibited SCC-4 cancer cells in vivo on a murine xenograft animal model. SCC-4 tumor cells were implanted into mice and groups of mice were treated with vehicle, berberine (10mg/kg of body weight) and doxorubicin (4mg/kg of body weight). The tested agents were injected once per four days intraperitoneally (i.p.), with treatment starting 4 weeks prior to cells inoculation. Treatment with 4mg/kg of doxorubicin or with 10mg/kg of berberine resulted in a reduction in tumor incidence. Tumor size in xenograft mice treated with 10mg/kg berberine was significantly smaller than that in the control group. Our findings indicated that berbeirne inhibits tumor growth in a xenograft animal model. Therefore, berberine may represent a tongue cancer preventive agent and can be used in clinic.
Matti Narkia

Dietary composition modulates brain mass and amyloid beta levels in a mouse model of ag... - 0 views

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    Dietary composition modulates brain mass and solubilizable Abeta levels in a mouse model of aggressive Alzheimer's amyloid pathology.
    Pedrini S, Thomas C, Brautigam H, Schmeidler J, Ho L, Fraser P, Westaway D, Hyslop PS, Martins RN, Buxbaum JD, Pasinetti GM, Dickstein DL, Hof PR, Ehrlich ME, Gandy S.
    Mol Neurodegener. 2009 Oct 21;4:40.
    PMID: 19845940
    doi:10.1186/1750-1326-4-40

    INTERPRETATION: Dissociation of Abeta changes from brain mass changes raises the possibility that diet plays a role not only in modulating amyloidosis but also in modulating neuronal vulnerability. However, in the absence of a study of the effects of a high protein/low carbohydrate diet on nontransgenic mice, one cannot be certain how much, if any, of the loss of brain mass exhibited by high protein/low carbohydrate diet-fed TgCRND8 mice was due to an interaction between cerebral amyloidosis and diet. Given the recent evidence that certain factors favor the maintenance of cognitive function in the face of substantial structural neuropathology, we propose that there might also exist factors that sensitize brain neurons to some forms of neurotoxicity, including, perhaps, amyloid neurotoxicity. Identification of these factors could help reconcile the poor clinicopathological correlation between cognitive status and structural neuropathology, including amyloid pathology.
Matti Narkia

A ketogenic diet reduces amyloid beta 40 and 42 in a mouse model of Alzheimer's disease... - 0 views

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    A ketogenic diet reduces amyloid beta 40 and 42 in a mouse model of Alzheimer's disease.
    Van der Auwera I, Wera S, Van Leuven F, Henderson ST.
    Nutr Metab (Lond). 2005 Oct 17;2:28.
    PMID: 16229744
    doi:10.1186/1743-7075-2-28

    CONCLUSION: Previous studies have suggested that diets rich in cholesterol and saturated fats increased the deposition of Abeta and the risk of developing AD. Here we demonstrate that a diet rich in saturated fats and low in carbohydrates can actually reduce levels of Abeta. Therefore, dietary strategies aimed at reducing Abeta levels should take into account interactions of dietary components and the metabolic outcomes, in particular, levels of carbohydrates, total calories, and presence of ketone bodies should be considered.
Matti Narkia

Vitamin D and aging. [J Steroid Biochem Mol Biol. 2009] - PubMed result - 0 views

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    Vitamin D and aging.
    Tuohimaa P.
    J Steroid Biochem Mol Biol. 2009 Mar;114(1-2):78-84. Review.
    PMID: 19444937
Matti Narkia

Developmental toxicity evaluation of berberine in rats and mice. Gloria D. Jahnke. 2006... - 0 views

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    Developmental toxicity evaluation of berberine in rats and mice.
    Jahnke GD, Price CJ, Marr MC, Myers CB, George JD.
    Birth Defects Res B Dev Reprod Toxicol. 2006 Jun;77(3):195-206.
    PMID: 16634078
    DOI: 10.1002/bdrb.20075

    BACKGROUND: Berberine, a plant alkaloid, is found in some herbal teas and health-related products. It is a component of goldenseal, an herbal supplement. Berberine chloride dihydrate (BCD) was evaluated for developmental toxicity in rats and mice.
    METHODS: Berberine chloride dihydrate was administered in the feed to timed-mated Sprague-Dawley (CD) rats (0, 3625, 7250, or 14,500 ppm; on gestational days [GD] 6-20), and Swiss Albino (CD-1) mice (0, 3500, 5250, or 7000 ppm; on GD 6-17). Ingested doses were 0, 282, 531, and 1313 mg/kg/day (rats) and 0, 569, 841, and 1155 mg/kg/day (mice).
    RESULTS:There were no maternal deaths. The rat maternal lowest observed adverse effect level (LOAEL), based on reduced maternal weight gain, was 7250 ppm. The rat developmental toxicity LOAEL, based on reduced fetal body weight per litter, was 14,500 ppm. In the mouse study, equivocal maternal and developmental toxicity LOAELs were 5250 ppm. Due to scattering of feed in the high dose groups, a gavage study at 1000 mg/kg/day was conducted in both species.
    CONCLUSIONS: In rats, maternal, but not fetal adverse effects were noted. The maternal toxicity LOAEL remained at 7250 ppm (531 mg/kg/day) based on the feed study and the developmental toxicity NOAEL was raised to 1000 mg/kg/day BCD based on the gavage study. In the mouse, 33% of the treated females died. Surviving animals had increased relative water intake, and average fetal body weight per litter decreased 5-6% with no change in live litter size. The maternal toxicity LOAEL remained at 5250 ppm (841 mg/kg/day) BCD, based on increased water consumption. The developmental toxicity LOAEL was raised to 1000 mg/kg/day BCD based on decreased fetal body weight.
Matti Narkia

Mechanisms of Berberine (Natural Yellow 18)-Induced Mitochondrial Dysfunction: Interact... - 0 views

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    Mechanisms of berberine (natural yellow 18)-induced mitochondrial dysfunction: interaction with the adenine nucleotide translocator.
    Pereira CV, Machado NG, Oliveira PJ.
    Toxicol Sci. 2008 Oct;105(2):408-17. Epub 2008 Jul 3.
    PMID: 18599498
    doi: 10.1124/jpet.107.128017

    The data from the present work appear to show that berberine also presents some degree of toxicity to "nontumor" systems, which should be carefully understood. ANT inhibition in nontumor cells by berberine would be responsible for a decrease in energy production and could also result in MPT induction. To the best of our knowledge, no full toxicity assessment exists for berberine in humans, although its use in several commercially available supplements suggests that the compound may present a relatively wide safety interval. In fact, a study with patients with congestive heart failure treated with 1.2 g/day of oral berberine revealed low toxicity and resulted into an average plasma concentration of 0.11 mg/l which would translate into 0.3µM (Zeng and Zeng, 1999Go). Repeated cumulative treatments, alternative forms of formulation (e.g., topical application vs. injection) or more importantly, active mitochondrial accumulation due to its positive charge would be expected to increase its concentration in cells into the range of concentrations used in this study.

    Empirical data from nontraditional medicines plus the use of extensive clinical assays would allow the use of berberine as a promising antimelanoma agent while maintaining its safety for humans. In radial/vertical forms of melanoma, a possible topical application of berberine would also be possible, thus minimizing side effects on other organs.

    In conclusion, the present work identifies the ANT as an important target for berberine, with clear relevance for its proposed antitumor effects.
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