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Nathan Goodyear

Clinical experience with intravenous administration of ascorbic acid: achievable levels... - 0 views

  • Patients with higher tumor markers are likely to have higher tumor burden, higher oxidative stress and, therefore, are more likely to have lower post IVC plasma levels.
  • Our data also showed that cancer patients with metastasis tend to have lower post-IVC vitamin C levels than those without metastasis
  • Lower peak plasma concentrations are obtained in cancer patients than in healthy subjects. Cancer patients who are deficient in vitamin C prior to therapy tend to achieve lower plasma levels post infusion.
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  • Patients with higher inflammation or tumor burdens, as measured by CRP levels or tumor antigen levels, tend to show lower peak plasma ascorbate levels after IVC.
  • Patients with metastatic tumors tend to achieve lower post infusion plasma ascorbate levels than those with localized tumors.
  • Meta-analyses of clinical studies involving cancer and vitamins also conclude that antioxidant supplementation does not interfere with the efficacy of chemotherapeutic regiments
  • Most of the prostate cancer patients studied, 75±19% (95% confidence), showed reductions in PSA levels during the course of their IVC therapy
  • Laboratory studies suggest that, at high concentrations, ascorbate does not interfere with chemotherapy or irradiation and may enhance efficacy in some situations
  • Cameron and Pauling observed fourfold survival times in terminal cancer patients treated with intravenous ascorbate infusions followed by oral supplementation
  • The inflammatory microenvironment of cancer cells leads to increasing oxidative stress, which apparently depletes vitamin C, resulting in lower plasma ascorbate concentrations in blood samples post IVC infusion. Another explanation for this finding may be that cancers are themselves more metabolically active in their uptake of vitamin C, causing subjects to absorb more of the vitamin, and as a results show lower plasma ascorbate concentrations in blood post IVC infusion.
  • patients with severely elevated CRP levels attain plasma ascorbate concentrations after IVC infusions that are only 65% of those attained for subjects with normal CRP levels
  • The finding of decreased plasma ascorbate levels in cancer patients may relate to the molecular structure of ascorbic acid; in particular, the similarity of its oxidized form, dihydroascorbic acid, to glucose
  • Since tumor have increased requirement for glucose [67], transport of dehydroascorbate into the cancer cells via glucose transport molecules and ascorbate through sodium-dependent transporter may be elevated
  • Increased accumulation of ascorbic acid in the tumor site was supported by measurements of the level of ascorbic acid in tumors in animal experiments
  • patients with advanced malignancies may have lower level of ascorbic acid in tissue, creating a higher demand for the vitamin C
  • IVC therapy appears to reduce CRP levels in cancer patients.
  • CRP concentrations directly correlate with disease activity in many cases and can contribute to disease progression through a range of pro-inflammatory properties.
  • Being an exquisitely sensitive marker of systemic inflammation and tissue damage, CRP is very useful in screening for organic disease and monitoring treatment responses
  • ncreases in CRP concentrations have been associated with poorer prognosis of survival in cancer patients, particularly with advance disease independent of tumor stage
  • Regarding inflammation, 73±13% of subjects (95% confidence) showed a reduction in CRP levels during therapy. This was an even more dramatic 86±13% (95% confidence) in subjects who started therapy with CRP levels above 10 mg/L
  • patients treated by IVC with follow-up several year showed that suppression of inflammation in cancer patients by high-dose IVC is feasible and potentially beneficial
  • Inflammation is a marker of high cancer risk, and poor treatment outcome
  • The subjects with highly elevated CRP concentrations have a three-fold elevation “all-cause” mortality risk and a twenty-eight fold increase in cancer mortality risk
  • cancer patients may need higher doses to achieve a given plasma concentration.
  • patients with lower vitamin C levels may see more distribution of intravenously administered ascorbate into tissues and thus attain less in plasma.
  • When treating patients with IVC, the first treatment likely serves to replenish depleted tissue stores, if those subjects were vitamin C deficient at the beginning of the treatment. Then, in subsequent treatments, with increasing doses, higher plasma concentrations can be attained. On-going treatments serve to progressively reduce oxidative stress in cancer patients.
  • large doses given intravenously may result in maximum plasma concentrations of roughly 30 mM, a level that has been shown to be sufficient for preferential cytotoxicity against cancer cells
  • oral intake of vitamin C exceeded 200 mg administered once daily, it was difficult to increase plasma and tissue concentrations above roughly 200 μM.
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    Great review on the use of IV vitamin C in cancer and to reduce inflammation.  The article does a great job of discussing the mechanism of vitamin C therapy in cancer as well as the proposed reasons for low vitamin C in cancer patients.  The study also highlights the obstacles to rise in vitamin C levels post IV vitamin C in cancer patients.
Nathan Goodyear

Obesity - Inducible Toll-like Receptor and NF-[kappa]B Regulatory Pathway Expression in... - 0 views

  • TLRs are functionally inducible and associated with downstream NF-B activation and proinflammatory cytokine production.
  • TLRs represent a family of receptors that are critical to the innate immune response against foreign pathogens and microorganisms
  • LPS has been shown to induce proinflammatory chemokine gene expression in differentiated human adipocytes through TLR and NF-B action
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  • Stimulation of TLRs initiates intracellular signaling cascades resulting in downstream NF-B and mitogen-activated protein kinase activation and production of proinflammatory chemokines associated with mechanisms of metabolic dysfunction and cardiovascular disease progression.
  • Elevated fatty acids levels associated with obesity activate TLR4 signaling in fat cells and macrophages, and induce insulin resistance in murine models
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    TLR, especially TLR-4, is directly involved in NF-KappaB activation and release of inflammatory cytokines
Nathan Goodyear

Environmental Health Perspectives: Polychlorinated Biphenyls, Lead, and Mercury Are Ass... - 0 views

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    Lead, Mercury, and PCBs shown to be a associated with elevations of liver enzymes, especially ALT.
Nathan Goodyear

Hepatoprotective Effect of Vitamin C (Ascorbic Acid) - 0 views

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    Vitamin C is hepatoprotective.  This review highlights the proposed methods by which vitamin C reduces ALT, AST, alkaline phosphatase, LDH, malondialdegyde...
Nathan Goodyear

Long-term testosterone therapy in hypogonadal men ameliorates elements of the metabolic... - 0 views

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    Testosterone therapy followed over 5 years in hypogonadal men found physiologic replacement of Testosterone decreased Total cholesterol, decreased LDL, increased HDL, decreased blood pressure, decreased blood glucose, decreased HgbA1c, decreased CRP, ALT, and AST. All men with metabolic syndrome  should have appropriate hormone evaluation done.
Nathan Goodyear

Effect of silymarin (milk thistle) on liver disease in patients with chronic hepatitis ... - 0 views

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    study finds milk thistle unsuccessful in lower ALT in HCV patients that had failed interferon therapy.  The dosing used in this study was low.
Nathan Goodyear

Unintended effects of statins from observational studies in the general population: sys... - 0 views

  • A markedly increased risk of myopathy was observed
  • One cohort study (Women’s Health Initiative) of higher quality and larger sample size found stronger evidence of an increased risk of self-reported T2DM (OR=1.47; 95% CI 1.32 to 1.64) for the groups of women who reported statin use at baseline and three years later
  • Hippisley-Cox et al. found an increased risk of liver enzyme changes
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  • weak evidence of an increased risk of type 2 diabetes mellitus (T2DM) was observed
  • Smeeth et al. found an increased risk of incident liver disease in the first year after the index date
  • The cumulative incidence of T2DM after three years of statin treatment was 6.25%, corresponding to an excess risk of 2.25%
  • We found no increased risk of peripheral neuropathy, depression, common eye diseases, renal disorders or arthritis associated with taking statins. Studies of higher quality did not show previously reported protective effects of statins on fractures, venous thrombo-embolism or pneumonia
  • There was evidence of an increase in myopathy, raised liver enzymes and diabetes.
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    Statin use associated with increased myopathy, liver dysfunction, and type II Diabetes.  The authors conclude that the absolute risk is very low, yet OR was 1.47 for type II Diabetes (translated 47% increased odds of developing Diabetes as a result of statins) and OR of 2.63 in risk of myopathy (translated 163% increased odds of developing myopathy as a result of statins).  Seems the authors "low risk" statement is just applies to those without symptoms/side effects.  Physicians need to do a better job of understanding risks and customizing therapies.
Nathan Goodyear

Transaminase Levels and Vigorous Exercise - 0 views

  • We accept 1–2 times the upper limit of normal to be attributable to exercise
  • Some physicians, whether they are gastroenterol-ogists or internists, forget that exercise can cause this abnormality
  • it is good for patients with liver disease to exercise, particularly those with fatty liver disease
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  • we see a trend toward improved ALT and AST levels in patients performing moderate exercise, regardless of the etiology of their liver disease
  • We therefore discourage very heavy exercise in these patients, but a moderate amount does not cause a problem
  • once enzymes are abnormal, they remain abnormal for up to 1 week. Were subjects to exercise vigorously again during that week, transaminase levels could increase further
  • there is a ratio that in healthy individuals is considered normal. AST levels normally measure at approximately 0.8 of ALT levels. A dysregularity of this ratio can also signal hepatic illness but usually inflammation of any kind affects both measures
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    Vigorous exercise yields abnormal liver enzymes.  How one defines vigorous exericse is going to vary from person to person.
Nathan Goodyear

The Ketogenic Diet and Sport: A Possible Marriage? : Exercise and Sport Sciences Reviews - 0 views

  • It is important to note that, although the blood level of glucose drops, it still remains at a physiological level (23), which is maintained through gluconeogenesis involving glucogenic amino acids and also glycerol released from triglycerides
  • “physiological ketosis” where KB levels may rise to 7 to 8 mmol L-1 (but without any pH change). In “pathological diabetic ketoacidosis,” on the other hand, ketonemia can exceed 20 mmol L-1 and also cause lowering of blood pH
  • in the initial phase of KD, about 16% of glucose comes from glycerol (released from triglyceride hydrolysis) and the bulk (60–65 g) from proteins via gluconeogenesis (proteins may be of either dietary or endogenous origin
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  • the protein supply consumed during a KD “preserves,” as demonstrated, lean body mass
  • The importance of glycerol as a glucose source increases progressively during ketosis; in fact, glycerol passes from supplying 16% of total glucose to an average of 60% after many days (>7 d) of complete fasting (from 38% in lean individual to 79% in the obese).
  • The possible reasons for the effectiveness of KD for weight loss may be listed as follows, in order of evidence, strongest first: Figure 3Image Tools 1. Appetite reduction: protein satiety, effects on appetite-related hormones such as ghrelin, and possibly a sort of direct appetite-blocking effect of KB 2. Reduced lipogenesis and increased fat oxidation 3. A reduction in respiratory quotient may indicate a greater metabolic efficiency in fat oxidation 4. A thermic effect of proteins and increased energy usage by gluconeogenesis
  • all data regarding biochemical and molecular mechanisms suggest that it is very difficult to increase muscle mass during a KD; use of which really should be limited to the few days immediately before competition in bodybuilding.
  • a long-term KD can interfere with some muscle hypertrophy mechanisms and this could be counterproductive if the aim of the athlete is to gain muscle mass
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    Great read on the ketogenic  and its application to sports/training...
Nathan Goodyear

The effectiveness of fermented turmeric powder in subjects with elevated alanine transa... - 0 views

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    fermented turmeric at 3 grams daily found to lower liver enzymes.
Nathan Goodyear

When and how to evaluate mildly elevated liver enzymes in apparently healthy patients - 0 views

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    Nice review of elevated liver enzymes.
Nathan Goodyear

Docosahexaenoic Acid but Not Eicosapentaenoic Acid Lowers Ambulatory Blood Pressure and... - 0 views

  • The results of this study suggest that DHA is the principal 3 fatty acid in fish and fish oils that is responsible for their BP- and HR-lowering effects in humans.
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    Omega-3, DHA lowers pressure and heart rate
Nathan Goodyear

TSH is a poor measure of severity of tissue hypothyroidism - 0 views

  • Thyroid stimulating hormone (TSH) tests are not useful for estimating the clinical and metabolic severity of primary overt thyroid failure. Meier and colleagues (p311) found that, in contrast with the accuracy of serum TSH measurement in the early diagnosis of hypothyroidism, clinical markers and circulating thyroid hormones much more accurately reflect the degree of tissue hypothyroidism. Initiation of replacement therapy should be guided by clinical presentation and circulating thyroid hormones and not by TSH concentrations
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    TSH is not a useful test
Nathan Goodyear

Modulation of NF-[kappa]B-dependent transcription and cell survival by the SIRT1 deacet... - 0 views

  • Treatment of cells with resveratrol, a small-molecule agonist of Sirtuin activity, potentiates chromatin-associated SIRT1 protein on the cIAP-2 promoter region, an effect that correlates with a loss of NF-B-regulated gene expression
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    resveratrol decreases NF-kappa Beta expression and thus reduces inflammation
Nathan Goodyear

International Journal of Obesity - Antiobesity action of peripheral exenatide (exendin-... - 0 views

  • Systemic exenatide reduces body weight gain in normal, high-fat-fed rodents
  • role in metabolic pathways mediating food intake.
  • the first of which to be identified was an enhancement of glucose-dependent insulin secretion
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  • limits glucose appearance via glucose-dependent slowing of gastric emptying
  • suppression of inappropriately elevated postprandial glucagon secretion
  • promote pancreatic -cell proliferation and islet cell neogenesis in both animal and in vitro studies
  • short-term regulator of food intake
  • eceptor agonism in satiety
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    exanatide helps in obesity and fatty liver treatment
Nathan Goodyear

Alt/Trad Medical Review - 0 views

  • Vitamin C interferes with several glucose tests, including tests diabetics use at home. U
  • rinary glucose test strips will test false positive with as little as 2,000mg of vitamin C daily
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    Vitamin C will induce false positives on glucose test strips
Nathan Goodyear

Annals of Occupational and Environmental Medicine | Full text | The Relationship of Liv... - 0 views

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    Lead and organic solvent exposure associated with increased liver function tests, indicating liver damage.
Nathan Goodyear

Association of serum lead and mercury level with cardiometabolic ri... - PubMed - NCBI - 0 views

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    study finds Pb and Hg associated with increased cardiometabolic risk factors.  Elevated liver enzymes found to be positively associated with serum Pb levels.  Metabolic Syndrome was found to be associated with higher Pb and Hg levels.
Nathan Goodyear

Evaluation of abnormal liver function tests | Postgraduate Medical Journal - 0 views

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    Nice review on liver function tests.
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