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Nathan Goodyear

Vitamin supplement use during breast cancer treatment and survival: a prospective cohor... - 0 views

www.ncbi.nlm.nih.gov/...PMC3057050

vitamins cancer

shared by Nathan Goodyear on 06 Oct 18 - No Cached
  • Nathan Goodyear on 06 Oct 18
     
    vitamins are not contraindicated in the use of traditional cancer therapies; in fact, epidemiological studies suggest they are in fact beneficial.
fitspresso

https://www.thefastleanpro.us/ - 0 views

www.thefastleanpro.us

the fast lean pro us usa fastlean fastleanpro caps drops uk buy jar get customer benefits 2023 work scam pros ebay pro2023 drop price

shared by fitspresso on 27 Sep 23 - No Cached
  • fitspresso on 27 Sep 23
     
    Fast Lean Pro™ (official) | weight lose Formula thefastleanpro.us · by Fast Lean Pro Fast Lean Pro Only $49/Bottle Limited Time Offer! Fast Lean Pro Special Deal + Special 51% Discount Save $300 + 180 Days Money Back Guarantee FastLeanPro The #1 Solution To natural metabolism booster helps you lose weight quickly without starving yourself. Fast Lean Pro is a natural powder supplement for weight loss that has recently been developed by Japanese scientists. Regular Price: $99/per bottle Only for: $49/per bottle What Is Fast Lean Pro? Fast Lean Pro is a powdered dietary powdery supplement designed to aid in weight loss. It contains a unique combination of ingredients that are believed to activate the body's "fasting switch" to optimize results. This product focuses not only on weight loss but also on promoting cellular rejuvenation, fasting, and a healthy metabolism. The concept behind Fast Lean Pro is that incorporating fasting into one's lifestyle can lead to positive outcomes irrespective of individual food choices and eating habits. To comprehend the mechanism of the Fast Lean Pro process, it is necessary to delve into its specific details. One of the few weight loss pills on the market that contains Fibersol is Fast Lean Pro. This safe, specialized fiber adds bulk to its weight when combined with water, curbing your appetite before it throws off your meal plan. If you're trying to lose weight or curb your appetite, Fast Lean Pro can help. Supporting substances such as niacin and chromium contribute to this. The body can further benefit from these nutrients, such as through improved metabolic regulation. Fast lean Pro is non-GMO, vegan friendly, and contains no artificial ingredients or stimulants. Fast Lean Pro is a weight loss product that promotes the body's natural self-feeding process. The body naturally removes old, damaged cells through a process known as autophagy to encourage cell regeneration and repair. Recent studies by a group
Nathan Goodyear

Indications, Contraindications, and Complications of Mesh in Surgical Treatment of Pelv... - 0 views

www.ncbi.nlm.nih.gov/...PMC3644007

erosion mesh POP complication

shared by Nathan Goodyear on 07 Aug 16 - No Cached
  • Nathan Goodyear on 07 Aug 16
     
    Maude database has erosions as the highest reported complication.
Nathan Goodyear

Diagnosing Growth Hormone Deficiency in Adults - 0 views

www.hindawi.com/...972617

HGH GH human growth hormone growth hormone IGF-1

shared by Nathan Goodyear on 04 Nov 14 - No Cached
  • it is clear that serum IGF-1 and or IGFBP-3 can be normal in patients with undisputed GHD
  • Various investigators have reported normal IGF-1 values in 37–70% of GH deficient adults
  • The co-administration of arginine and GHRH (the combined test) is a powerful stimulus for GH production and has gained increasing acceptance as a useful method of diagnosing GHD [34]. This test has been advocated as a suitable alternative to ITT
  • ...12 more annotations...
  • The glucagon stimulation test (GST) is a reliable, safe alternative to the ITT in the diagnosis of GHD
  • An intravenous infusion of arginine (0.5 g/kg body weight) together with an intravenous bolus of GHRH (1 mcg/kg body weight) is administered [30]. Serum samples for GH are then obtained every 15–30 minutes for two hours.
  • Obesity, particularly marked obesity, is associated with blunted GH secretion in response to provocative stimuli
  • It has also been suggested that that even mildly increased BMI (25–30 kg/m2) can result in diminished stimulated GH production in 13% of healthy subjects
  • Corneli et al. have defined BMI-specific cut-off points for diagnosing adult-onset GHD using GHRH + arginine—11.5 ng/mL for those with BMI < 25 kg/m2, 8.0 ng/mL for BMI 25–30 kg/m2, 4.2 ng/mL for those with BMI > 30 kg/m2
  • GH levels are higher during the luteal phase in comparison with the follicular phase of the cycle
  • Oral, in contrast to transdermal oestrogen, lowers IGF-1 levels and is associated with increased GH levels
  • Adequate pituitary replacement with thyroxine and hydrocortisone are needed for optimal GH production
  • one cannot rely on a low IGF-1 to diagnose GHD in women taking oral oestrogen preparations.
  • Numerous GH secretagogues are available with the insulin tolerance test being the gold standard and the glucagon stimulation test or the GHRH + arginine as acceptable alternatives
  • ain et al. found the GST to be at least as good as the ITT in provoking GH secretion
  • the GST is safe, with almost no contraindications, it causes nausea and sometimes vomiting in 15–20% of subjects
  • Nathan Goodyear on 04 Nov 14
     
    Nice, more recent analysis, of HGH testing.
Nathan Goodyear

Pharmacologic ascorbic acid concentrations selectively kill cancer cells: Action as a p... - 0 views

www.pnas.org/...13604.full

IV vitamin C cancer ascorbic acid vitamin C H2O2 GPX glutathione Perioxidase

shared by Nathan Goodyear on 09 Feb 11 - Cached
  • Taken together, these data indicate that ascorbate at concentrations achieved only by i.v. administration may be a pro-drug for formation of H2O2, and that blood can be a delivery system of the pro-drug to tissues.
  • These findings give plausibility to i.v. ascorbic acid in cancer treatment, and have unexpected implications for treatment of infections where H2O2 may be beneficial
  • pharmacologic concentrations of ascorbate killed cancer but not normal cells, that cell death was dependent only on extracellular but not intracellular ascorbate, and that killing was dependent on extracellular hydrogen peroxide (H2O2) formation with ascorbate radical as an intermediate
  • ...48 more annotations...
  • Our data show that ascorbic acid selectively killed cancer but not normal cells, using concentrations that could only be achieved by i.v. administration
  • Ascorbate-mediated cell death was due to protein-dependent extracellular H2O2 generation, via ascorbate radical formation from ascorbate as the electron donor. Like glucose, when ascorbate is infused i.v., the resulting pharmacologic concentrations should distribute rapidly in the extracellular water space (42). We showed that such pharmacologic ascorbate concentrations in media, as a surrogate for extracellular fluid, generated ascorbate radical and H2O2. In contrast, the same pharmacologic ascorbate concentrations in whole blood generated little detectable ascorbate radical and no detectable H2O2. These findings can be accounted for by efficient and redundant H2O2 catabolic pathways in whole blood (e.g., catalase and glutathione peroxidase) relative to those in media or extracellular fluid
  • ascorbic acid administered i.v. in pharmacologic concentrations may serve as a pro-drug for H2O2 delivery to the extracellular milieu
  • H2O2 generated in blood is normally removed by catalase and glutathione peroxidase within red blood cells, with internal glutathione providing reducing equivalents
  • The electron source for glutathione is NADPH from the pentose shunt, via glucose-6-phosphate dehydrogenase. If activity of this enzyme is diminished, the predicted outcome is impaired H2O2 removal causing intravascular hemolysis, the observed clinical finding.
    • Nathan Goodyear
      Nathan Goodyear on 05 Mar 18
       
      The mechansism here is inadequate recycling of GSH due to lack of G6PD, build up of intracellular H2O2 and RBC lysis--hemolysis.
  • Only recently has it been understood that the discordant clinical findings can be explained by previously unrecognized fundamental pharmacokinetics properties of ascorbate
  • Intracellular transport of ascorbate is tightly controlled in relation to extracellular concentration
  • Intravenous ascorbate infusion is expected to drastically change extracellular but not intracellular concentrations
  • For i.v. ascorbate to be clinically useful in killing cancer cells, pharmacologic but not physiologic extracellular concentrations should be effective, independent of intracellular ascorbate concentrations.
    • Nathan Goodyear
      Nathan Goodyear on 05 Mar 18
       
      accumulation of extracellular vitamin C is the effect.
  • It is unknown why ascorbate, via H2O2, killed some cancer cells but not normal cells.
  • There was no correlation with ascorbate-induced cell death and glutathione, catalase activity, or glutathione peroxidase activity.
  • H2O2, as the product of pharmacologic ascorbate concentrations, has potential therapeutic uses in addition to cancer treatment, especially in infections
  • Neutrophils generate H2O2 from superoxide,
  • i.v. ascorbate is effective in some viral infections
  • H2O2 is toxic to hepatitis C
  • Use of ascorbate as an H2O2-delivery system against sensitive pathogens, viral or bacterial, has substantial clinical implications that deserve rapid exploration.
  • Recent pharmacokinetics studies in men and women show that 10 g of ascorbate given i.v. is expected to produce plasma concentrations of nearly 6 mM, which are >25-fold higher than those concentrations from the same oral dose
  • As much as a 70-fold difference in plasma concentrations is expected between oral and i.v. administration,
  • Complementary and alternative medicine practitioners worldwide currently use ascorbate i.v. in some patients, in part because there is no apparent harm
  • Human Burkitt's lymphoma cells
  • We first investigated whether ascorbate in pharmacologic concentrations selectively affected the survival of cancer cells by studying nine cancer cell lines
  • Clinical pharmacokinetics analyses show that pharmacologic concentrations of plasma ascorbate, from 0.3 to 15 mM, are achievable only from i.v. administration
  • plasma ascorbate concentrations from maximum possible oral doses cannot exceed 0.22 mM because of limited intestinal absorption
  • For five of the nine cancer cell lines, ascorbate concentrations causing a 50% decrease in cell survival (EC50 values) were less than 5 mM, a concentration easily achievable from i.v. infusion
  • All tested normal cells were insensitive to 20 mM ascorbate.
    • Nathan Goodyear
      Nathan Goodyear on 05 Mar 18
       
      meaning safe.
  • Lymphoma cells were selected because of their sensitivity to ascorbate
  • As ascorbate concentration increased, the pattern of death changed from apoptosis to pyknosis/necrosis, a pattern suggestive of H2O2-mediated cell death
  • Apoptosis occurred by 6 h after exposure, and cell death by pyknosis was ≈90% at 14 h after exposure
    • Nathan Goodyear
      Nathan Goodyear on 05 Mar 18
       
      work continued beyond the IVC therapy itself
  • In contrast to lymphoma cells, there was little or no killing of normal lymphocytes and monocytes by ascorbate
  • Ascorbate is transported into cells as such by sodium-dependent transporters, whereas dehydroascorbic acid is transported into cells by glucose transporters and then immediately reduced internally to ascorbate
  • Whether or not intracellular ascorbate was preloaded, extracellular ascorbate induced the same amount and type of death.
  • extracellular ascorbate in pharmacologic concentrations mediates death of lymphoma cells by apoptosis and pyknosis/necrosis, independently of intracellular ascorbate.
  • H2O2 as the effector species mediating pharmacologic ascorbate-induced cell death
  • Superoxide dismutase was not protective
  • Because these data implicated H2O2 in cell killing, we added H2O2 to lymphoma cells and studied death patterns using nuclear staining (19, 28). The death patterns found with exogenous H2O2 exposure were similar to those found with ascorbate
  • For both ascorbate and H2O2, death changed from apoptosis to pyknosis/necrosis as concentrations increased
  • Sensitivity to direct exposure to H2O2 was greater in lymphoma cells compared with normal lymphocytes and normal monocytes
  • There was no association between the EC50 for ascorbate-mediated cell death and intracellular glutathione concentrations, catalase activity, or glutathione peroxidase activity
  • H2O2 generation was dependent on time, ascorbate concentration, and the presence of trace amounts of serum in media
  • ascorbate radical is a surrogate marker for H2O2 formation.
  • whatever H2O2 is generated should be removed by glutathione peroxidase and catalase within red blood cells, because H2O2 is membrane permeable
  • The data are consistent with the hypothesis that ascorbate in pharmacologic concentrations is a pro-drug for H2O2 generation in the extracellular milieu but not in blood.
  • The occurrence of one predicted complication, oxalate kidney stones, is controversial
  • In patients with glucose-6-phosphate dehydrogenase deficiency, i.v. ascorbate is contraindicated because it causes intravascular hemolysis
  • ascorbate at pharmacologic concentrations in blood is a pro-drug for H2O2 delivery to tissues.
  • ascorbate, an electron-donor in such reactions, ironically initiates pro-oxidant chemistry and H2O2 formation
  • data here showed that ascorbate initiated H2O2 formation extracellularly, but H2O2 targets could be either intracellular or extracellular, because H2O2 is membrane permeant
    • Nathan Goodyear
      Nathan Goodyear on 05 Mar 18
       
      the conversion of ascorbate to H2O2 occurs extracellular
  • More than 100 patients have been described, presumably without glucose-6-phosphate dehydrogenase deficiency, who received 10 g or more of i.v. ascorbate with no reported adverse effects other than tumor lysis
  • Nathan Goodyear on 09 Feb 11
     
    IV vitamin C benefits cancer patients
Nathan Goodyear

Hyperbaric oxygen therapy promotes neurogenesis: where do we stand? - 0 views

www.ncbi.nlm.nih.gov/...PMC3231808

hbot hyperbaric therapy hyperbaric brain TBI stroke neurogenesis neuorplasticity

shared by Nathan Goodyear on 18 May 17 - No Cached
  • Numerous in vivo and in vitro studies confirm that HBOT induces neurogenesis
  • HIF-1α is the principal mediator of cellular hypoxia adaptations
  • activated by hypoxia, HIF-1α causes the transcription of its regulated downstream genes, including erythropoietin (EPO) and VEGF which are known to promote neurogenesis
  • ...10 more annotations...
  • The safety of HBOT was also evaluated and it was pointed out that, if given at proper paradigms, like 1.5 ATA for 60 minutes, HBOT will not cause oxygen toxicity
  • Rockswold et al., on the other hand, found that HBOT might be potentially beneficial for severe TBI patients
  • McDonagh et al., concluded that there was insufficient evidence to establish the effectiveness of HBOT in the treatment of TBI
  • The first multicenter, randomized, double-blind, controlled trial in 2009 found that 40-hour HBOT of 24% oxygen at 1.3 ATM produced significant improvement in children's overall functioning, receptive language, social interaction, eye contact, and sensory/cognitive awareness compared to those received slightly pressurized room air
  • Another study in 2010 on 16 autism patients, adopting a similar treatment paradigm, showed no effect on a wide array of behavioral evaluations
  • To date, there is little evidence that HBOT causes malignant growth or metastasis. A history of malignancy should therefore not be considered as a contraindication for HBOT
  • HBOT enhances the production of reactive oxygen species (ROS) and causes oxidative stress in body tissues
  • Excessive accumulation of oxidative stress may contribute to neurodegenerative processes and cell death in the brain, as seen in diseases like Alzheimer's disease (AD) and Parkinson's disease (PD)
  • Hormesis
  • process that results in a functional improvement of cellular stress resistance, survival, and longevity in response to sub-lethal levels of stress
  • Nathan Goodyear on 18 May 17
     
    great review of hbot, brain injury, neuroplasticity and neurogenesis.
Nathan Goodyear

Intravenously administered vitamin C as cancer therapy: three cases - 0 views

www.ncbi.nlm.nih.gov/...PMC1405876

IV vitamin C vitamin C cancer

shared by Nathan Goodyear on 24 Apr 17 - No Cached
  • peak plasma concentrations obtained intravenously are estimated to reach 14 000 μmol/L, and concentrations above 2000 μmol/L may persist for several hours
  • Emerging in vitro data show that extracellular ascorbic acid selectively kills some cancer but no normal cells by generating hydrogen peroxide
  • Death is mediated exclusively by extracellular ascorbate, at pharmacologic concentrations that can be achieved only by intravenous administration
  • ...6 more annotations...
  • Vitamin C may serve as a pro-drug for hydrogen peroxide delivery to extravascular tissues, but without the presence of hydrogen peroxide in blood
  • not all cancer cells were killed by ascorbic acid in vitro
  • Intravascular hemolysis was reported after massive vitamin C administration in people with glucose-6-phosphate dehydrogenase deficiency
  • Administration of high-dose vitamin C to patients with systemic iron overload may increase iron absorption and represents a contraindication
  • Ascorbic acid is metabolized to oxalate, and 2 cases of acute oxalate nephropathy were reported in patients with pre-existing renal insufficiency given massive intravenous doses of vitamin C
  • Rare cases of acute tumour hemorrhage and necrosis were reported in patients with advanced cancer within a few days of starting high-dose intravenous vitamin C therapy, although this was not independently verified by pathologic review
  • Nathan Goodyear on 24 Apr 17
     
    IV vitamin C associated with prolonged survival in 3 patients with different cancers.  Peak serum levels reached 14,000 micromol/L, which levels above the 1,000 micro mol/L (cancer cell cytotoxic threshold) were maintained for hours
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