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Nathan Goodyear

Association Between Endogenous Sex Hormones and Liver Fat in a Mult... - PubMed - NCBI - 0 views

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    Time that physicians start following the science.  Study using data from the Multi-ethnic Study of Atherosclerosis was used to assess hormones and fatty liver in men and women.  Increasing bioavailable Testosterone levels in women was found to be associated with increasing fatty liver in post-menopausal women.  The opposite was found to be true in men.  Higher Estradiol levels were found to be associated with increased fatty liver in both sexes.  However, the statistical significance was higher with men.  Higher SHBG was associated with lower fatty liver incidence in men.  
Nathan Goodyear

Fructose Consumption as a Risk Factor for Non-alcoholic Fatty Liver Disease - 0 views

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    Fructose upregulates fructokinase activity and this increase liver triglyceride production increasing non-alcoholic fatty liver disease also known as NAFLD.
Nathan Goodyear

Prevalence of Fatty Liver in Children and Adolescents - 0 views

  • Fatty liver is the most common liver abnormality in children age 2 to 19 years
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    Fatty liver is most common liver abnormality in children 2 - 19.  Accounting for 13% of children in this study
Nathan Goodyear

Plasma Adiponectin in Nonalcoholic Fatty Liver Is Related to Hepatic Insulin Resistance... - 0 views

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    in those with nonalcoholic fatty liver disease, low adiponectin is associated with the insulin resistance, not the NAFLD.  But of course, insulin resistance leads to NAFLD
Nathan Goodyear

Uric acid induces hepatic steatosis by generatio... [J Biol Chem. 2012] - PubMed - NCBI - 0 views

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    Elevated uric acid levels up regulate fructose metabolism to triglycerides and fatty liver.  This study finds that liver mitochondrial oxidative stress is also evident.  This mitochondrial dysfunction also leads to compromised ATP production and fat accumulation specifically through inhibition of aconitase..
Nathan Goodyear

Association of nonalcoholic fatty liver disease with insulin resistance - 0 views

  • Nonalcoholic fatty liver disease is associated with insulin resistance and hyperinsulinemia
  • educe insulin sensitivity and increase serum triglyceride levels may be responsible for its development.
  • Genetic factors that
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    Insulin resistance and fatty liver
Nathan Goodyear

Low testosterone and non-alcoholic fatty liver disease: Evidence for their independent ... - 0 views

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    Low Testosterone increased nonalcoholic fatty liver disease in men. The prevalence of NAFLD reached 85% with Total Testosterone was < 300 ng/dl.  Free Testosterone required a greater drop to increase the NAFLD, but it to still was found to be associated.
Nathan Goodyear

[Glutathione in the treatment of ch... [Recenti Prog Med. 1995 Jul-Aug] - PubMed - NCBI - 0 views

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    high dose IV glutathione shown to reduce liver enzymes and thus liver cell damage in those with chronic fatty liver disease
Nathan Goodyear

N-Acetylcysteine Improves Liver Function in Patients with Non-Alcoholic Fatty Liver Dis... - 0 views

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    Oral NAC useful for elevated liver enzymes in NAFLD
Nathan Goodyear

Mediterranean diet and non-alcoholic fatty liver disease: the need of extended and comp... - 1 views

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    Mediterranean diet decreases fatty liver deposits in NAFLD at 6 months.
Nathan Goodyear

The Mediterranean diet improves hepatic steatosis and insulin sensitivity in individual... - 0 views

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    Mediterranean diet reduced insulin resistance and liver steatosis in those with NAFLD.
Nathan Goodyear

Adherence to the Mediterranean diet is associated with the severity of non-al... - 0 views

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    In those with NAFLD, mediterranean diet associated with reduced insulin resistance and reduced severity of liver disease; it did not resolve NAFLD
Nathan Goodyear

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

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    with an estimated 25% of Americans with non-alcoholic fatty liver disease (NAFLD), elevated liver enzymes are becoming a more common finding.  Nice review article on what the tests mean and what disease are underlying.
Nathan Goodyear

Nonalcoholic Fatty Liver Disease in Children - 0 views

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    non-alcoholic fatty liver disease is the new epidemic.  But the scary point is NAFLD is found in many of our children.  As goes obesity, so goes NAFLD
Nathan Goodyear

Epidemiology of non-alcoholic fatty liver disease. [Dig Dis. 2010] - PubMed result - 0 views

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    non-alcoholic fatty liver disease the result of Metabolic syndrome.  New epidemic associated with obesity. Scary statistics about the children of America.
Nathan Goodyear

The obesity epidemic and nonalcoholic fatty liver ... [Curr Gastroenterol Rep. 2008] - ... - 0 views

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    obesity and non-alcoholic fatty liver disease are one in the same.
Nathan Goodyear

Nonalcoholic Fatty Liver Disease - 0 views

  • aracterized by clinical and laboratory data similar to those found in diabetes and obesity. NAF
  • We concluded that NAFLD, in the presence of normoglycemia and normal or moderately increased body weight, is ch
  • aracterized by clinical and laboratory data similar to those found in diabetes and obesity. NAF
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  • LD may be considered an additional feature of the metabolic syndrome, with specific hepatic insulin resistance
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    Fatty Liver is component of Metabolic Syndrome
Nathan Goodyear

Uric Acid Stimulates Fructokinase and Accelerates Fructose Metabolism in the Developmen... - 0 views

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    Vicious cycle.  High fructose intake increases uric acid production.  Hyperuricemia then leads to further Fructose metabolism.  This study finds that hyperuricemia upregulates the fructokinase enzyme that is the first step in fructose metabolism.  This upregulation will increase fructose metabolism and increase fat accumulation in the liver.
Nathan Goodyear

Polychlorinated biphenyls, lead, and... [Environ Health Perspect. 2010] - PubMed - NCBI - 0 views

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    PCBs, Pb, and Hg associated with elevated liver enzymes, and non-alcohol fatty liver disease.  
Nathan Goodyear

Metabolic endotoxemia: a molecular link between obesity and cardiovascular risk - 0 views

  • Weight gain has been associated with a higher gut permeability
  • a high-fat diet promotes LPS absorption
  • higher concentrations of fatty acids impair intestinal barrier integrity
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  • The starting point for innate immunity activation is the recognition of conserved structures of bacteria, viruses, and fungal components through pattern-recognition receptors
  • TLRs are PRRs that recognize microbe-associated molecular patterns
  • TLRs are transmembrane proteins containing extracellular domains rich in leucine repeat sequences and a cytosolic domain homologous to the IL1 receptor intracellular domain
  • The major proinflammatory mediators produced by the TLR4 activation in response to endotoxin (LPS) are TNFα, IL1β and IL6, which are also elevated in obese and insulin-resistant patients
  • Obesity, high-fat diet, diabetes, and NAFLD are associated with higher gut permeability leading to metabolic endotoxemia.
  • Probiotics, prebiotics, and antibiotic treatment can reduce LPS absorption
  • LPS promotes hepatic insulin resistance, hypertriglyceridemia, hepatic triglyceride accumulation, and secretion of pro-inflammatory cytokines promoting the progression of fatty liver disease.
  • In the endothelium, LPS induces the expression of pro-inflammatory, chemotactic, and adhesion molecules, which promotes atherosclerosis development and progression.
  • In the adipose tissue, LPS induces adipogenesis, insulin resistance, macrophage infiltration, oxidative stress, and release of pro-inflammatory cytokines and chemokines.
  • the gut microbiota has been recently proposed to be an environmental factor involved in the control of body weight and energy homeostasis by modulating plasma LPS levels
  • dietary fats alone might not be sufficient to cause overweight and obesity, suggesting that a bacterially related factor might be responsible for high-fat diet-induced obesity.
  • This was accompanied in high-fat-fed mice by a change in gut microbiota composition, with reduction in Bifidobacterium and Eubacterium spp.
  • n humans, it was also shown that meals with high-fat and high-carbohydrate content (fast-food style western diet) were able to decrease bifidobacteria levels and increase intestinal permeability and LPS concentrations
  • it was demonstrated that, more than the fat amount, its composition was a critical modulator of ME (Laugerette et al. 2012). Very recently, Mani et al. (2013) demonstrated that LPS concentration was increased by a meal rich in saturated fatty acids (SFA), while decreased after a meal rich in n-3 polyunsaturated fatty acids (n-3 PUFA).
  • this effect seems to be due to the fact that some SFA (e.g., lauric and mystiric acids) are part of the lipid-A component of LPS and also to n-3 PUFA's role on reducing LPS potency when substituting SFA in lipid-A
  • these experimental results suggest a pivotal role of CD14-mediated TLR4 activation in the development of LPS-mediated nutritional changes.
  • This suggests a link between gut microbiota, western diet, and obesity and indicates that gut microbiota manipulation can beneficially affect the host's weight and adiposity.
  • endotoxemia was independently associated with energy intake but not fat intake in a multivariate analysis
  • in vitro that endotoxemia activates pro-inflammatory cytokine/chemokine production via NFκB and MAPK signaling in preadipocytes and decreased peroxisome proliferator-activated receptor γ activity and insulin responsiveness in adipocytes.
  • T2DM patients have mean values of LPS that are 76% higher than healthy controls
  • LPS-induced release of glucagon, GH and cortisol, which inhibit glucose uptake, both peripheral and hepatic
  • LPSs also seem to induce ROS-mediated apoptosis in pancreatic cells
  • Recent evidence has been linking ME with dyslipidemia, increased intrahepatic triglycerides, development, and progression of alcoholic and nonalcoholic fatty liver disease
  • The hepatocytes, rather than hepatic macrophages, are the cells responsible for its clearance, being ultimately excreted in bile
  • All the subclasses of plasma lipoproteins can bind and neutralize the toxic effects of LPS, both in vitro (Eichbaum et al. 1991) and in vivo (Harris et al. 1990), and this phenomenon seems to be dependent on the number of phospholipids in the lipoprotein surface (Levels et al. 2001). LDL seems to be involved in LPS clearance, but this antiatherogenic effect is outweighed by its proatherogenic features
  • LPS produces hypertriglyceridemia by several mechanisms, depending on LPS concentration. In animal models, low-dose LPS increases hepatic lipoprotein (such as VLDL) synthesis, whereas high-dose LPS decreases lipoprotein catabolism
  • When a dose of LPS similar to that observed in ME was infused in humans, a 2.5-fold increase in endothelial lipase was observed, with consequent reduction in total and HDL. This mechanism may explain low HDL levels in ‘ME’ and other inflammatory conditions such as obesity and metabolic syndrome
  • It is known that the high-fat diet and the ‘ME’ increase intrahepatic triglyceride accumulation, thus synergistically contributing to the development and progression of alcoholic and NAFLD, from the initial stages characterized by intrahepatic triglyceride accumulation up to chronic inflammation (nonalcoholic steatohepatitis), fibrosis, and cirrhosis
  • On the other hand, LPS activates Kupffer cells leading to an increased production of ROS and pro-inflammatory cytokines like TNFα
  • high-fat diet mice presented with ME, which positively and significantly correlated with plasminogen activator inhibitor (PAI-1), IL1, TNFα, STAMP2, NADPHox, MCP-1, and F4/80 (a specific marker of mature macrophages) mRNAs
  • prebiotic administration reduces intestinal permeability to LPS in obese mice and is associated with decreased systemic inflammation when compared with controls
  • Cani et al. also found that high-fat diet mice presented with not only ME but also higher levels of inflammatory markers, oxidative stress, and macrophage infiltration markers
  • This suggests that important links between gut microbiota, ME, inflammation, and oxidative stress are implicated in a high-fat diet situation
  • high-fat feeding is associated with adipose tissue macrophage infiltration (F4/80-positive cells) and increased levels of chemokine MCP-1, suggesting a strong link between ME, proinflammatory status, oxidative stress, and, lately, increased CV risk
  • LPS has been shown to promote atherosclerosis
  • markers of systemic inflammation such as circulating bacterial endotoxin were elevated in patients with chronic infections and were strong predictors of increased atherosclerotic risk
  • As a TLR4 ligand, LPS has been suggested to induce atherosclerosis development and progression, via a TLR4-mediated inflammatory state.
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    Very nice updated review on Metabolic endotoxemia
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