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Nathan Goodyear

Dynamic Changes in Dopaminergic Neurotransmission Induced by a Low Concentration of Bis... - 0 views

onlinelibrary.wiley.com/...full

BPA Bisphenol-A dopamine mesolimbic system psychological dependence

shared by Nathan Goodyear on 10 Oct 11 - No Cached
  • Nathan Goodyear on 10 Oct 11
     
    BPA and changes in the mesolimbic/dopamine system
Nathan Goodyear

ScienceDirect - Appetite : Deficiency of central dopamine in multiple obesity models. - 0 views

www.sciencedirect.com/science

shared by Nathan Goodyear on 29 Apr 11 - No Cached
  • Nathan Goodyear on 29 Apr 11
     
    overeating and obesity may be result of low dopamine levels
Nathan Goodyear

The implication of neuroactive steroids in Tourette syndrome pathogenesis: a ... - 0 views

www.ncbi.nlm.nih.gov/...PMC3849218

tourette's syndrome hormones 5-alpha reductase

shared by Nathan Goodyear on 08 Dec 15 - No Cached
  • The typical onset of TS occurs at 6–7 years of age and is characterized by the appearance of simple, recurrent motor tics, followed by the manifestation of phonic tics after several months [12]. In most children, TS symptoms undergo a progressive exacerbation, which reaches its zenith at the beginning of puberty (11–12 years of age), and is then followed by a gradual remission in the majority of patients
  • 30–40% of TS-affected children retain their symptoms in adulthood
  • Multiple neurotransmitters have been implicated in TS, including dopamine (DA), serotonin, norepinephrine, acetylcholine, glutamate and γ-amino-butyric acid (GABA)
  • ...11 more annotations...
  • female gender may predict greater tic severity in adulthood
  • male gender is a major risk factor for TS (with a male:female prevalence ratio estimated at ~4:1)
  • the typical age of onset coincides with adrenarche (6–7 years old); symptoms increase in severity until the beginning of puberty (12 years old) and then undergo a spontaneous amelioration, which becomes apparent with the end of puberty (at 18–19 years of age)
  • TS is diagnosed later in females than males
  • ample evidence supports the involvement of DAergic dysfunctions in TS
  • a number of clinical observations showed that tics in TS patients could be exacerbated by anabolic androgens
  • steroidogenic enzymes and androgen receptors may serve as putative therapeutic targets for this disorder
  • Unlike males, tic severity is typically increased after puberty in females
  • 26% of females were found to experience exacerbation of tics in the estrogenic phase of the menstrual cycle, and this phenomenon was found to be correlated with increased tic severity at menarche
  • biochemical hallmark of adrenarche is the acquisition of 17,20 lyase activity by cytochrome P450 C17 (CYP17A1)
  • increased synthesis of dehydroepiandrosterone (DHEA) and androstenedione, which leads to the growth of axillary and pubic hair as well as enhancement in the oiliness of the skin
  • Nathan Goodyear on 08 Dec 15
     
    interesting read on hormones and tourette's.. Proposed that 5 alpha reductase activity is involved in worsening of tics.  This makes sense as Testosterone in men with low T is known to increase dopamine and dopaminergic dysfunction is known to play a role in tourette's;  the clinical presentation of girls vs boys is very different.  The authors of this article propose that 5 alpha reductase activity controls a back door method where by progesterone is converted to androgens.
Nathan Goodyear

Gonadal hormone regulation of MAO and other enzymes in hypothalamic areas. - PubMed - NCBI - 0 views

www.ncbi.nlm.nih.gov/...6835476

progesterone MAO serotonin dopamine norepinephrine hormones

shared by Nathan Goodyear on 12 Jul 17 - No Cached
  • Nathan Goodyear on 12 Jul 17
     
    Progesterone increased MAO in prior estrogen treatment.  Without prior treatment, Progesterone did not increase MAO and decrease the monoamine neurotransmitters norepinephrine, serotonin, and dopamine.
Nathan Goodyear

Acute changes in 5-HT metabolism after S-adeno... [Gen Pharmacol. 1989] - PubMed - NCBI - 0 views

www.ncbi.nlm.nih.gov/...2473938

SAMe methylation depression serotonin

shared by Nathan Goodyear on 26 Jun 12 - No Cached
  • Nathan Goodyear on 26 Jun 12
     
    SAMe increased hippocampal serotonin levels by 300% in rat brain model.  Methylation is known to play a major role in serotonin, dopamine, and norepinephrine.
Nathan Goodyear

Brain dopamine and obesity - 0 views

tauruspet.med.yale.edu/...J-Wang-Lancet-2001-obesity.pdf

brain dopamine overweight weight-loss obesity

shared by Nathan Goodyear on 27 Feb 12 - No Cached
  • Nathan Goodyear on 27 Feb 12
     
    here is the full article in pdf form
onlinemedzonline

buy adderall online at onlinemedzonline .com - 0 views

Adderall is a drug which is composed of two closely related components - amphetamine and dextroamphetamine. The drug mainly contains amphetamine in the percentage of 25% and dextroamphetamine in th...

health Disease hormones hormone cancer Testosterone Men inflammation obesity low Male

started by onlinemedzonline on 12 Mar 19 no follow-up yet
Nathan Goodyear

Redox imbalance in Parkinson's disease. [Biochim Biophys Acta. 2008] - PubMed - NCBI - 0 views

www.ncbi.nlm.nih.gov/...18358848

Parkinson's disease ROS oxidative stress dopamine

shared by Nathan Goodyear on 14 Dec 11 - No Cached
  • Nathan Goodyear on 14 Dec 11
     
    oxidative stress and Parkinson's disease
Nathan Goodyear

How environmental and genetic factors combine to c... [Neurotoxicology. 2008] - PubMed ... - 0 views

www.ncbi.nlm.nih.gov/...18031821

autism spectrum disorders ASD

shared by Nathan Goodyear on 05 Jul 11 - No Cached
  • Genetic polymorphisms adversely affecting sulfur metabolism, methylation, detoxification, dopamine signaling and the formation of neuronal networks occur more frequently in autistic subjects.
  • a "redox/methylation hypothesis of autism" is described, in which oxidative stress, initiated by environment factors in genetically vulnerable individuals, leads to impaired methylation and neurological deficits secondary to reductions in the capacity for synchronizing neural networks.
  • Nathan Goodyear on 05 Jul 11
     
    proposed hypothesis of autism
Nathan Goodyear

Frontiers | Performance enhancement at the cost of potential brain plasticity: neural r... - 0 views

journal.frontiersin.org/...full

psychostimulants stimulants prescription brain neuroscience neuroplasticity methylphenidate amphetamine dopamine norepinephrine serotonin cognition

shared by Nathan Goodyear on 06 Jun 14 - No Cached
  • Nathan Goodyear on 06 Jun 14
     
    Great article on the detriment of prescription stimulants for cognitive enhancement.  The authors describe an inverted "U" efficacy curve.
Nathan Goodyear

What Happens to Your Brain on Sugar, Explained by Science - Mic - 0 views

mic.com/...-on-sugar-explained-by-science

brain sugar dopamine

shared by Nathan Goodyear on 26 Mar 15 - No Cached
  • Nathan Goodyear on 26 Mar 15
     
    This is your brain on drugs, sorry I meant sugar.
Nathan Goodyear

Enhancement of dopaminergic activity and region-specific activation of Nrf2-ARE pathway... - 0 views

www.ncbi.nlm.nih.gov/...26893122

low T Testosterone low Testosterone dopamine hormones male hormones

shared by Nathan Goodyear on 22 Feb 16 - No Cached
  • Nathan Goodyear on 22 Feb 16
     
    Testosterone stimulates dopaminergic activity in rat study.  
Nathan Goodyear

Creatine supplementation in Parkinson disease: a placebo-controlled randomized pilot tr... - 0 views

www.ncbi.nlm.nih.gov/...17030762

creatine Parkinson's disease excitotoxicity dopamine brain

shared by Nathan Goodyear on 21 Feb 16 - No Cached
  • Nathan Goodyear on 21 Feb 16
     
    Human study: creatine helpful in Parkinson's disease.  Of note, less dopaminergic support was needed with creatine supplementation.
Nathan Goodyear

Sources and Significance of Plasma Levels of Catechols and Their Metabolites in Humans - 0 views

jpet.aspetjournals.org/...800.full

dopamine DOPAC catecholamines neurotransmitters epinephrine norepinephrine

shared by Nathan Goodyear on 21 Oct 15 - No Cached
  • Nathan Goodyear on 21 Oct 15
     
    Good review of the sources and metabolism of catecholamines in the blood.
Nathan Goodyear

Dexamethasone prevents postoperative nausea and vomiting: Benefit versus risk - Science... - 0 views

www.sciencedirect.com/...S1875459711000609

dexamethasone nausea

shared by Nathan Goodyear on 14 Aug 18 - No Cached
  • 2.5–10 mg
  • Dexamethasone is a synthetic form of adrenocorticoid, and acts mainly as a glucocorticoid receptor with almost no mineralocorticoid receptor functions
  • dexamethasone increases synthesis of endorphin in the body,14 uplifting moods and appetite
  • ...2 more annotations...
  • serotonin Type 3 receptor antagonist (ondansetron, dolasetron, and granisetron), dopamine Type 2 receptor antagonist (droperidol and metoclopramide), muscarinic cholinergic Type 1 receptor antagonist (scopolamine), and histamine Type 1 receptor antagonist (promethazine and prochlorperazine)
  • dexamethasone can effectively prevent PONV7, 8, 9 induced by epidural morphine used to reduce postoperative pain
  • Nathan Goodyear on 14 Aug 18
     
    Dexamethasone for nausea
Nathan Goodyear

Opioid-induced nausea and vomiting - Smith - Annals of Palliative Medicine - 0 views

apm.amegroups.com/...1264

nausea

shared by Nathan Goodyear on 14 Aug 18 - No Cached
  • Some of the “emetogenic” receptors that have been proposed are dopamine-2 (D2), histamine-1 (H1), DOR, 5-hydroxytryptamine (serotonin) (5-HT3), acetylcholine (ACh), neurokinin-1 (NK-1), and cannabinoid receptor-1 (CB1)
  • Olanzapine decreased morphine-induced nausea and vomiting in a dose-dependent manner.
  • Nathan Goodyear on 14 Aug 18
     
    Good review of meds for nausea.
Nathan Goodyear

Sex hormones affect neurotransmitters and shape the adult female brain during hormonal ... - 0 views

www.ncbi.nlm.nih.gov/...PMC4335177

hormones neurotransmitters serotonin GABA dopamine estradiol progesterone glutamate

shared by Nathan Goodyear on 11 Jul 17 - No Cached
  • estrogen administration has been found to increase tryptophan hydroxylase
  • 5-HT2A mRNA levels in brain areas relevant for the control of mood, mental state and cognition (Sumner and Fink, 1998) and 5-HTT mRNA when administered for a longer period
  • n the other hand, estrogen treatment has also been observed to decrease mRNA related to serotonergic neurotransmission
  • ...4 more annotations...
  • Furthermore, acute estrogen administration decreases 5-HTT mRNA levels (Pecins-Thompson et al., 1998) and 5-HT1A mRNA levels and binding
  • assigning the effects of estrogen on serotonin to a homogenous functional class of stimulation or inhibition seems not to be feasible
  • Progesterone has been suggested to increase serotonergic neurotransmission via the regulation of the expression of serotonin-related genes and proteins
  • menopausal women gain less benefit from antidepressant treatments compared to women during their reproductive years
  • Nathan Goodyear on 11 Jul 17
     
    good review of the relationship of the sex hormones and neurotransmitters.
Nathan Goodyear

Plant-Based Nutritional Supplementation Attenuates LPS-Induced Low-Grade Systemic Activ... - 0 views

www.ncbi.nlm.nih.gov/...PMC7826722

TLR4 inflammation LPS metabolic endotoxemia plant-based nutrition plant-based diet plant-based

shared by Nathan Goodyear on 03 Sep 21 - No Cached
  • consumption of this particular diet for at least a 2-month period helped to reduce the outcomes of both acute and chronic inflammation induced by LPS.
  • chronic inflammation compromised both glucose and insulin tolerance, which is normally seen in certain chronic metabolic diseases
  • LPS resulted in an increase in neopterin levels, which is a marker for immune system activation
  • ...6 more annotations...
  • diet enriched in fruits and vegetables (and consequently phytochemicals) was able to reverse the process and maintain and even elevate insulin sensitivity and glucose tolerance
  • LPS-mediated effects are related to an increase in TLR4 levels that triggers the activation of nuclear factor-kB (NF-kB), a transcription factor that activates a cascade of inflammatory mediators [41]. These factors control the transcription of inflammatory mediators, such as IL-1β, IL-6, TNF-α, TNF-β, INF-α, INFβ, INF-γ
  • Inflammation can alter insulin action and give rise to diabetes and obesity by blocking insulin receptor downstream events, impairing insulin receptor substrate 1 (IRS-1) activation and phosphatidylinositol 3-kinase-dependent (PI3K) pathways, therefore compromising insulin signaling
  • systemic inflammation (generated by LPS) also increased neopterin levels in the urine and resulted in altered neuronal activity by decreasing dopamine (DA) metabolism
  • an increase in neopterin levels has been recognized a sensitive biomarker for immune system activation
  • Our experiments denoted that these diets were able to diminish inflammatory mediators and oxidative damage
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