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Nathan Goodyear

Severe shoulder tendinopathy associated with levofloxacin - ScienceDirect - 0 views

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    Case study of should tendinopathy in a patient after use of levaquin
Nathan Goodyear

30-day mortality after systemic anticancer treatment for breast and lung cancer in Engl... - 0 views

  • Our data also suggest that 30-day mortality might be higher than previously estimated by several clinical trials.9, 10 The 30-day mortality rate after SACT with curative intent for NSCLC reported here is high at 3% compared with published trial data for the standard treatments, which suggested that 0·8% of patients died from treatment-induced toxicity when chemotherapy was given as adjuvant treatment alongside surgery
  • findings of clinical trials in selected age cohorts cannot readily be generalised to all patients
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    Population study from England finds significant increase in mortality in first 30 days of chemotherapy in breast and lung cancer treatment.  The previously published trial dat was 0.8%; this study was as high as 3%.  This cast doubt as to the inference of the risk from clinical trials to the general population.
Nathan Goodyear

Vitamin C preferentially kills cancer stem cells in hepatocellular carcinoma via SVCT-2... - 0 views

  • Chen et al. have revealed that ascorbate at pharmacologic concentrations (0.3–20 mM) achieved only by intravenously (i.v.) administration selectively kills a variety of cancer cell lines in vitro, but has little cytotoxic effect on normal cells.
  • Ascorbic acid (the reduced form of vitamin C) is specifically transported into cells by sodium-dependent vitamin C transporters (SVCTs)
  • SVCT-1 is predominantly expressed in epithelial tissues
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  • whereas the expression of SVCT-2 is ubiquitous
  • differential sensitivity to VC may result from variations in VC flow into cells, which is dependent on SVCT-2 expression.
  • high-dose VC significantly impaired both the tumorspheres initiation (Fig. 4d, e) and the growth of established tumorspheres derived from HCC cells (Fig. 4f, g) in a time-dependent and dose-dependent manner.
  • Hepatocellular carcinoma (HCC)
  • The antioxidant, N-acetyl-L-cysteine (NAC), preventing VC-induced ROS production (a ROS scavenger), completely restored the viability and colony formation among VC-treated cells
  • DNA double-strand damage was found following VC treatment
  • DNA damage was prevented by NAC
  • Interestingly, the combination of VC and cisplatin was even more effective in reducing tumor growth and weight
  • Consistent with the in vitro results, stemness-related genes expressions in tumor xenograft were remarkably reduced after VC or VC+cisplatin treatment, whereas conventional cisplatin therapy alone led to the increase of CSCs
  • VC is one of the numerous common hepatoprotectants.
  • Interestingly, at extracellular concentrations greater than 1 mM, VC induces strong cytotoxicity to cancer cells including liver cancer cells
  • we hypothesized that intravenous VC might reduce the risk of recurrence in HCC patients after curative liver resection.
  • Intriguingly, the 5-year disease-free survival (DFS) for patients who received intravenous VC was 24%, as opposed to 15% for no intravenous VC-treated patients
  • Median DFS time for VC users was 25.2 vs. 18 months for VC non-users
  • intravenous VC use is linked to improved DFS in HCC patients.
  • In this study, based on the elevated expression of SVCT-2, which is responsible for VC uptake, in liver CSCs, we revealed that clinically achievable concentrations of VC preferentially eradicated liver CSCs in vitro and in vivo
    • Nathan Goodyear
       
      the authors here made similar mistakes to the Mayo authors i.e. under doses here in this study.  They dosed at only 2 grams IVC.  A woefully low dose of IVC.
  • Additionally, we found that intravenous VC reduced the risk of post-surgical HCC progression in a retrospective cohort study.
    • Nathan Goodyear
       
      positive results despite a low dose used.
    • Nathan Goodyear
       
      Their comfort zone was 1mM.  They should have targeted 20-40 mM.
  • Three hundred thirty-nine participants (55.3%) received 2 g intravenous VC for 4 or more days after initial hepatectomy
  • As the key protein responsible for VC uptake in the liver, SVCT-2 played crucial roles in regulating the sensitivity to ascorbate-induced cytotoxicity
  • we also observed that SVCT-2 was highly expressed in human HCC samples and preferentially elevated in liver CSCs
  • SVCT-2 might serve as a potential CSC marker and therapeutic target in HCC
  • CSCs play critical roles in regulating tumor initiation, relapse, and chemoresistance
  • we revealed that VC treatment dramatically reduced the self-renewal ability, expression levels of CSC-associated genes, and percentages of CSCs in HCC, indicating that CSCs were more susceptible to VC-induced cell death
  • as a drug for eradicating CSCs, VC may represent a promising strategy for treatment of HCC, alone or particularly in combination with chemotherapeutic drugs
  • In HCC, we found that VC-generated ROS caused genotoxic stress (DNA damage) and metabolic stress (ATP depletion), which further activated the cyclin-dependent kinase inhibitor p21, leading to G2/M phase cell cycle arrest and caspase-dependent apoptosis in HCC cells
  • we demonstrated a synergistic effect of VC and chemotherapeutic drug cisplatin on killing HCC both in vitro and in vivo
  • Intravenous VC has also been reported to reduce chemotherapy-associated toxicity of carboplatin and paclitaxel in patients,38 but the specific mechanism needs further investigation
    • Nathan Goodyear
       
      so, exclude the benefit to patients until the exact mechanism of action, which will never be fully elicited?!?!?
  • Our retrospective cohort study also showed that intravenous VC use (2 g) was related to the improved DFS in HCC patients after initial hepatectomy
    • Nathan Goodyear
       
      Terribly inadequate dose.  Target is 20-40 mM which other studies have found occur with 50-75 grams of IVC.
  • several clinical trials of high-dose intravenous VC have been conducted in patients with advanced cancer and have revealed improved quality of life and prolonged OS
  • high-dose VC was not toxic to immune cells and major immune cell subpopulations in vivo
  • high recurrence rate and heterogeneity
  • tumor progression, metastasis, and chemotherapy-resistance
  • SVCT-2 was highly expressed in HCC samples in comparison to peri-tumor tissues
  • high expression (grade 2+/3+) of SVCT-2 was in agreement with poorer overall survival (OS) of HCC patients (Fig. 1c) and more aggressive tumor behavior
  • SVCT-2 is enriched in liver CSCs
  • these data suggest that SVCT-2 is preferentially expressed in liver CSCs and is required for the maintenance of liver CSCs.
  • pharmacologic concentrations of plasma VC higher than 0.3 mM are achievable only from i.v. administration
  • The viabilities of HCC cells were dramatically decreased after exposure to VC in dose-dependent manner
  • VC and cisplatin combination further caused cell apoptosis in tumor xenograft
  • These results verify that VC inhibits tumor growth in HCC PDX models and SVCT-2 expression level is associated with VC response
  • qPCR and IHC analysis demonstrated that expression levels of CSC-associated genes and percentages of CSCs in PDXs dramatically declined after VC treatment, confirming the inhibitory role of VC in liver CSCs
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    IV vitamin C in vitro and in vivo found to "preferentially" eradicate cancer stem cells.  In addition, IV vitamin C was found to be adjunctive to chemotherapy, found to be hepatoprotectant.  This study also looked at SVCT-2, which is the transport protein important in liver C uptake.
Nathan Goodyear

Vitamin C increases viral mimicry induced by 5-aza-2′-deoxycytidine | PNAS - 0 views

  • Vitamin C alone at concentrations up to 57 μM had little effect on cell growth but was toxic at 228 μM (SI Appendix, Fig. S1B), in line with recent studies of high vitamin C concentrations (125–2,000 μM)
  • In our combination approach, vitamin C increased the effects of low doses of 5-aza-CdR, with 57 μM vitamin C almost doubling the growth inhibition
  • Using the Chou–Talalay method (28), we found that the two compounds indeed acted synergistically, rather than additively, to inhibit cancer cell growth over the physiological ranges of vitamin C in healthy individuals (26–84 μM)
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  • These results show that targeting the cancer DNA methylome by combining low-dose 5-aza-CdR and vitamin C stimulates the expression of ERVs, the induction of a cell-autonomous immune activation response, and increased apoptosis of cancer cells
  • The addition of vitamin C to treatment protocols therefore may be a straightforward way to increase the clinical efficacy of such drugs in MDS and leukemia patients
  • Vitamin C deficiency has been seen previously in patients with multiple types of cancer, including hematological malignancies (35⇓–37). We predict that these patients might receive the most benefits from the combination treatment.
  • induction of an innate immune response
  • We therefore measured plasma concentrations of vitamin C in a small number of patients with miscellaneous hematologic malignancies. Strikingly, 58% of patients with hematological neoplasia who were not taking vitamin C supplements had severe vitamin C deficiency (serum concentration <11.4 μM, at which clinical features of scurvy may be manifested) (34), and 33% had vitamin C levels below the normal range
  • it is possible that vitamin C was oxidized to DHA before it was transported into the cells
  • Oral administration of vitamin C should be sufficient for the therapeutic strategy, because the concentrations reported in this study would not require i.v. administration.
    • Nathan Goodyear
       
      This statement lacks a basic understanding of vitamin C pharmacokinetics.
  • Vitamin C is an essential nutrient for humans and has been reported to increase IFN levels in human cells upon virus infection
  • daily treatment with vitamin C alone at physiological concentrations enhanced the expression of viral-defense genes relative to untreated cells
  • When combined with low-dose 5-aza-CdR, physiological concentrations of vitamin C synergistically inhibited cancer-cell growth and induced apoptosis. Such synergy was associated with increased ERV expression and dsRNA in treated cells. The mechanism of action differs from that of vitamin C at higher doses, which involves its pro-oxidant activity, including GSH inhibition, to generate reactive oxygen species
  • This activity has been shown to induce DNA damage and to enhance the sensitivities of myeloid malignancies, multiple myeloma, and cutaneous T-cell lymphoma to arsenic trioxide (41⇓⇓–44). It also can increase chemosensitivity of ovarian cancer cells (27) and selectively kill KRAS or BRAF mutant colorectal cancer cells by inhibiting GAPDH
  • reactive oxygen species
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    91% of patients with hematologic malignancies have vitamin C levels that are either low or severly deficient. This study found that vitamin C plus low dose DNA methyltransferase inhibitors have synergistic inhibition of cancer cell proliferation and increased apoptosis.  Unfortunately, the authors claimed that oral vitamin C would be sufficient which indicates an incredible lack of understanding of vitamin C pharmacokinetics.
Nathan Goodyear

Demystified . . . Human endogenous retroviruses - 0 views

  • HERVs have been inherited by successive generations and it is possible that some have conferred biological benefits
  • However, several HERVs have been implicated in certain cancers and autoimmune diseases
  • HERVs constitute about 1% of the human genome
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  • Human endogenous retroviruses (HERVs) represent footprints of previous retroviral infection and have been termed “fossil viruses”
  • HERVs possess a similar genomic organisation to present day exogenous retroviruses such as human immunodeficiency virus (HIV) and human T cell leukaemia virus (HTLV)
  • Retroviruses in effect are retrograde, because the flow of genetic information is reversed compared with the normal pathway of molecular biosynthesis—DNA → RNA → protein. Indeed, all retroviruses necessitate the conversion of viral RNA into a cDNA intermediary, which is catalysed by the enzyme reverse transcriptase
  • Overall, human endogenous retroviruses constitute about 1% of the human genome”
  • some HERVs have been implicated in certain autoimmune diseases and cancers
  • A unit of sugar, phosphate, and base is strictly termed a nucleotide
  • human genes are composed of exons, which are transcribed and translated into amino acids
  • introns, which are interspersed between exons and represent non-translated regions that contribute to the large size of some genes
  • convincing argument for the possible involvement of HERVs in malignancy
  • HERVs may be involved in carcinogenesis by virtue of the expression of HERV mRNA,26 functional proteins,27 or retroviral-like particles
  • They may also be associated with the generation of new promoters29 or the activation of proto-oncogenes
  • inhibition of an effective immune response,
  • encode immunosuppressive proteins
  • “It has been suggested that HERV-K may be important in the progression of testicular germ cell tumours through inhibition of an effective immune response”
  • HERV-K might be important in the pathogenesis of human breast cancer
  • activation of proto-oncogenes of the ras family is common in many tumour types, and some studies have suggested a potential role for HERVs in ras activation
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    good review of HERVs.
Nathan Goodyear

Frontiers | Management of Glioblastoma Multiforme in a Patient Treated With Ketogenic M... - 0 views

  • The SOC for GBM was modified in this patient to initiate KMT prior to surgical resection, to eliminate steroid medication, and to include HBOT as part of the therapy
  • the greatest therapeutic benefit for patients (near 1.0)
  • The observed reduction in blood glucose in our patient would reduce lactic acid fermentation in the tumor cells, while the elevation of ketone bodies would fuel normal cells thus protecting them from hypoglycemia and oxidative stress
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  • Previous studies showed that GBM survival and tumor growth was correlated with blood glucose levels
  • Evidence indicates that glioma cells cannot effectively use ketone bodies for energy due to defects in the number, structure, and function of their mitochondria
  • The accuracy of the GKI as a predictor for therapeutic efficacy, however, is better when ketone bodies are measured from the blood than when measured from the urine
  • A reduction of glucose-driven lactic acid fermentation would not only increase tumor cell apoptosis, but would also reduce inflammation and edema in the tumor microenvironment thus reducing tumor cell angiogenesis and invasion
  • Besides serving as a metabolic fuel for GBM, glutamine is also an essential metabolite for normal immune cells
  • therapies that inhibit glutamine availability and utilization must be strategically employed to avoid inadvertent impairment of immune cell functions
  • we used the non-toxic green tea extract, EGCG, and chloroquine in an attempt to limit glutamine availability to the tumor cells
  • EGCG is thought to target the glutamate dehydrogenase activity that facilitates glutamine metabolism in GBM cells
  • Chloroquine, on the other hand, will inhibit lysosomal digestion thus restricting fermentable amino acids and carbohydrates from phagocytosed materials in the tumor microenvironment
  • HBOT to increase oxidative stress in the tumor cells
  • As glucose and glutamine fermentation protect tumor cells from oxidative stress, reduced availability of these metabolites under ketosis could enhance the therapeutic action of HBOT, as we recently described
  • Prior to subtotal tumor resection and standard of care (SOC), the patient conducted a 72-h water-only fast
  • Following the fast, the patient initiated a vitamin/mineral-supplemented ketogenic diet (KD) for 21 days that delivered 900 kcal/day
  • KD (increased to 1,500 kcal/day at day 22
  • the patient received metformin (1,000 mg/day), methylfolate (1,000 mg/day), chloroquine phosphate (150 mg/day), epigallocatechin gallate (400 mg/day), and hyperbaric oxygen therapy (HBOT) (60 min/session, 5 sessions/week at 2.5 ATA)
  • Biomarkers showed reduced blood glucose and elevated levels of urinary ketones with evidence of reduced metabolic activity (choline/N-acetylaspartate ratio) and normalized levels of insulin, triglycerides, and vitamin D
  • This is the first report of confirmed GBM treated with a modified SOC together with KMT and HBOT, and other targeted metabolic therapies
  • Glioblastoma multiforme (GBM) is the most common and malignant of the primary adult brain cancers
  • less than 20% of younger adults generally survive beyond 24 months
  • glucose and glutamine are the primary fuels that drive the rapid growth of most tumors including GBM
  • Glucose drives tumor growth through aerobic fermentation (Warburg effect), while glutamine drives tumor growth through glutaminolysis
  • The fermentation waste products of these molecules, i.e., lactic acid and succinic acid, respectively, acidify the tumor microenvironment thus contributing further to tumor progression
  • Glucose and glutamine metabolism is also responsible for the high antioxidant capacity of the tumor cells thus making them resistant to chemo- and radiotherapies
  • The reliance on glucose and glutamine for tumor cell malignancy comes largely from the documented defects in the number, structure, and function of mitochondria and mitochondrial-associated membranes
  • These abnormalities cause the neoplastic GBM cells to rely more heavily on substrate level phosphorylation than on oxidative phosphorylation for energy
  • dexamethasone not only increases blood glucose levels but also increases glutamine levels through its induction of glutamine synthetase activity
    • Nathan Goodyear
       
      use mannitol instead
  • Calorie restriction and restricted KD are anti-angiogenic, anti-inflammatory, anti-invasive, and also kill tumor cells through a proapoptotic mechanism
  • Evidence also shows that therapeutic ketosis can act synergistically with several drugs and procedures to enhance cancer management improving both progression free and overall survival
  • hyperbaric oxygen therapy (HBOT) increases oxidative stress on tumor cells especially when used alongside therapies that reduce blood glucose and raise blood ketones
  • The glutamine dehydrogenase inhibitor, epigallocatechin gallate (EGCG) is also proposed to target glutamine metabolism
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    Case study of Glioblastoma treated with ketogenic metabolic therapy as an adjuct to modified standard therapy.
Nathan Goodyear

Improved leukemia-free survival after postconsolidation immunotherapy with histamine di... - 0 views

  • several independent lines of evidence suggest that cytotoxic effector cells such as T cells and natural killer (NK) cells participate in protecting patients with AML against relapse
  • A plethora of mechanisms have been proposed to account for the dysfunctional antileukemic lymphocytes in AML, including the production of T-cell- and NK-cell-inhibitory factors by AML blasts,48 a deficient expression of NK-cell receptors on leukemic cells,49 inhibition of antileukemic lymphocytes by mononuclear phagocytes,4 and an impaired stimulatory interaction between the CD28 antigen expressed by T cells and contact antigens on AML blasts
  • This trial met the primary endpoint and thus showed a significantly improved LFS for patients receiving HDC/IL-2 as compared with the current standard of care
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  • T cells and NK cells with antileukemic activity can be recovered from most patients with AML in remission not receiving a transplant,
  • The present study evaluated an approach to immunotherapy in AML in which IL-2 is supplemented with histamine dihydrochloride (HDC) to enhance the function of cytotoxic antileukemic lymphocytes
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    IL-2 plus histamine in patients with AML complete remission improves leukemia free survival.
fnfdoc

Flu Symptoms And Home Remedies | Health Blog - 0 views

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    In this article we covered Flu Symptoms And Home Remedies. Influenza is a common respiratory illness that affects people from all age groups. Flu symptoms include a runny nose, sore throat, catarrh, and headache. Home remedies for flu are being used for centuries and have proven to be effective.
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    Influenza is a highly contagious, respiratory illness that affects people from all age groups and geographic backgrounds. In temperate regions, it occurs mostly in the winter months. There is no clear seasonal pattern in tropical climates. It varies in its severity from person to person. Sometimes, it presents as a mild, temporary infection. Other times, it can cause complications like red urine and ultimately lead to death. Influenza causes approximately 375,000 deaths worldwide each year.
Nathan Goodyear

Histamine dihydrochloride and low-dose interleukin-2 as post-consolidation im... - 0 views

  • IL-2 is a central T cell-derived cytokine, which induces NK cell and T cell proliferation, differentiation and activation, and also stim-ulates the production of secondary immunostimulatory cytokines
  • combination of histamine and IL-2 thus triggers efficient NK cell-mediated killing of several types of leukemic cells, including freshly recovered human AML blasts
  • histamine improves the effects of IL-2 on T cell activation
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  • principal action of histamine is to protect cytotoxic lymphocytes from myeloid-cell-induced inactivation, thus improving the efficiency of the T and NK cell stimulation achieved by IL-2
  • random-ized Phase II study of patients with renal cell carcinoma further support the suggestion that the combination of HDC and IL-2 improves lymphocyte functions
  • HDC improves the effectiveness of IL-2-induced T and NK cell activation in cancer patients, as predicted in preclinical models
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    histamine dihydrochloride enhances immune effects of NK cells in IL02 therapy; specifically in this analysis in AML, the histamin prevented inactivation of the IL-2 activated NK cells.
Nathan Goodyear

Cancers | Free Full-Text | A Second WNT for Old Drugs: Drug Repositioning against WNT-D... - 0 views

  • To date nearly half of known human tumors show a dysregulation of the WNT signaling pathway
  • It should be also noted that the WNT pathway is not exclusively employed during development or overactivated in cancer. In adults many healthy tissues rely on it for renewal and homeostasis maintenance, most notably the intestine, haematopoietic system, hair, bones and skin. Therefore one might expect adverse reactions in all these organ systems, which has indeed been observed for many WNT-targeting compounds upon attempts to push them into the clinics
  • The intestine seems to be the most vulnerable in this regard
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  • Ivermectin inhibits proliferation of human colon cancer and lung cancer cells both in vitro and in vivo
  • The anti-proliferative action, affecting both the bulk tumor cells and CSCs, was linked in this study to inhibition of WNT signaling
  • the anti-WNT IC50 of ivermectin is 5–10 times (~1–2 µM vs. 10 µM) lower than that of its toxic effect against chloride channels
  • oral bioavailability of the drug, as for other antiparasitic drugs discussed in this section, is very low
  • Toxicity studies in vivo have also demonstrated a wide therapeutic index for ivermectin
  • Its anti-proliferative activity has been demonstrated in a wide array of cancer cell lines representative of WNT-dependent cancers: non-small lung carcinoma [96], multiple myeloma [97], hepatoma [98], adrenocortical carcinoma [99], ovarian cancer [100] and glioblastoma
  • Niclosamide inhibits the canonical WNT pathway
  • In addition to inhibiting the canonical WNT pathway, niclosamide may mediate its anticancer activities through several other signaling pathways such as NOTCH [107], MTOR [108], NF-κB [97] and STAT3 [96]
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    review article highlights older medications that have anti-Wnt pathway effects in cancer.  Roughly, 50% of cancer involve upregulated Wnt pathway activity. Other drugs of note: metformin
Nathan Goodyear

Reduction of Resuscitation Fluid Volumes in Severely Burned Patients Using Ascorbic Aci... - 0 views

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    IV vitamin C, high dose, found to benefit patients early in burn critical care.
Nathan Goodyear

Epithelial‐to‐mesenchymal transition (EMT) to sarcoma in recurrent lung adeno... - 0 views

  • facilitates the dissemination of cancer cells to distant organs. In addition to facilitating metastasis, EMT is thought to generate cancer stem cells (CSCs), which are generally resistant to apoptosis and to standard chemotherapeutic drugs and radiotherapy
  • IL‐6, which enhances TGF‐β‐induced EMT changes in NSCLC
  • aside from TGF‐β and Snail, several other signalling pathways including Notch, Wnt, and integrin are known to activate EMT through transcriptional repression of E‐cadherin
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  • increasing evidence that treatment with chemotherapy or chemoradiotherapy can induce EMT in NSCLC which in turn is thought to generate CSCs which are generally resistant to such treatments
  • cisplatin has been shown to increase the release of Interleukin‐6 (IL‐6) and expression of transforming growth factor beta (TGF‐β)
  • EMT confers an invasive phenotype and
  • IL‐6 serves to block apoptosis in cells
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    Chemotherapy causes EMT.
Nathan Goodyear

Curcumin Suppression of Cytokine Release and Cytokine Storm. A Potential Therapy for Pa... - 0 views

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    Curcumin suppresses cytokine storm
Nathan Goodyear

Pharmacokinetics and pharmacodynamics of intravenous artesunate during severe malaria t... - 0 views

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    to be read
Nathan Goodyear

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

  • 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
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  • 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
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    great review of hbot, brain injury, neuroplasticity and neurogenesis.
Nathan Goodyear

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

  • 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
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  • 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
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    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
Nathan Goodyear

https://www.cns.org/sites/default/files/clinical_neuro/Chapter18_0.pdf - 0 views

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    Human study: High dose IV vitamin C and IM vitamin E shown to improve outcome.
Nathan Goodyear

The Single Nucleotide Polymorphism Gly482Ser in the PGC-1α Gene Impairs Exerc... - 0 views

  • Oxidative slow-twitch type I fibres (henceforth briefly called ‘slow fibres’) contain MHC-Iβ. They use oxidative phosphorylation (OXPHOS) to generate ATP and are thus highly fatigue resistant and preferentially activated during endurance exercise. Slow fibres comprise high amounts of mitochondria, myoglobin and lipid droplets, and are well supplied by capillaries
  • there are three types of fast-twitch fibres (types IIA, IID/X, IIB, with the corresponding MHC isoforms IIa, IId/x, IIb) which are all used for rapid high-force generation. Oxidative-glycolytic fast-twitch type IIA fibres have intermediate amounts of mitochondria, lipid droplets and capillaries, and are intermediately resistant to fatigue (as compared to type I and types IIB and IID/X). Glycolytic fast-twitch type IID/X fibres are poor in mitochondria, lipids and capillaries and more susceptible to fatique than type IIA. Glycolytic fast-twitch type IIB fibres have the lowest amounts of mitochondria, lipid droplets and capillaries, but generate the highest contraction velocities
  • Several studies have shown that PGC-1α is upregulated after endurance training
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  • upregulation of PGC-1α expression enhances and/or maintains mitochondrial biogenesis, eventually leading to an increased mitochondrial content of the muscle fibres.
  • PGC-1α also plays an important role in the pathogenesis of insulin resistance and T2D
  • carriers of the Gly482Ser SNP have a reduced cardiorespiratory fitness and a higher risk for metabolic syndrome and T2D
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    Those that carry the risk SNP for Gly482Ser for the PGC-1alpha gene dont' transform type II to type I and thus decrease the effectiveness of aeorbic exercise training, decreased oxidative phosphorylation, decreased lipid oxidation, increased lipid accumulaiton in muscle, and increased risk of IR, obesity, and diabetes.
Nathan Goodyear

Vitamin C Mitigates Oxidative Stress and Tumor Necrosis Factor-Alpha in Severe Communit... - 0 views

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    Cell culture study found that vitamin C inhibited LPS mediated increase in ROS, TNF-alpha, IL-6... The cells were taken from adults with pneumonia
Nathan Goodyear

Statins use and coronary artery plaque composition: Results from the International Mult... - 0 views

  • Statin use is associated with an increased prevalence and extent of coronary plaques possessing calcium
  • As compared with individuals not taking statins, those taking statins possessed a significantly higher prevalence of obstructive CAD, as well as higher numbers of vessels with obstructive CAD
  • non-calcified plaques (NCP)
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  • non-calcified (NCP), mixed (MP), or calcified (CP) plaque
  • statin use was each associated with a significantly higher prevalence of NCP, MP and CP
  • statin use was associated with increased presence of MP [odds ratio (OR) 1.46, 95% confidence interval (CI) 1.27–1.68, p < 0.001] and CP (OR 1.54, 95% CI 1.36–1.74, p < 0.001], but not NCP
  • statin use was associated with increasing numbers of coronary segments possessing MP and CP but not associated with increasing numbers of coronary segments possessing NCP
  • North America, Europe and Asia
  • A total of 6673 individuals (2413 on statin therapy and 4260 not on statin therapy) comprised the study population
  • we identified a strong association of statin use to coronary artery plaque features
  • statin use was associated with a differentially increased prevalence and extent of MP and CP
  • one potential unifying hypothesis is that rather than regression of coronary plaque, statins may contribute to the conversion of coronary plaque constituents, perhaps by conversion of NCP to plaque possessing calcium
  • Coronary computed tomographic angiography (CCTA)
  • Statin use was associated with a higher frequency of severe coronary artery stenoses as well as numbers of coronary vessels with obstructive CAD
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    Study finds statin therapy associated with increased coronary plaque with calcium.
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