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ryleighnyp

The night gardeners: Immune cells rewire, repair brain while we sleep -- ScienceDaily - 0 views

  • implications for brain plasticity, diseases like autism spectrum disorders, schizophrenia, and dementia, which arise when the brain's networks are not maintained properly, and the ability of the brain to fight off infection and repair the damage following a stroke or other traumatic injury.
  • implications for brain plasticity, diseases like autism spectrum disorders, schizophrenia, and dementia, which arise when the brain's networks are not maintained properly, and the ability of the brain to fight off infection and repair the damage following a stroke or other traumatic injury.
    • ryleighnyp
       
      It would be interesting to look deeper into these process and the mechanism behind maintenance of the brain.
  • This research shows that the signals in our brain that modulate the sleep and awake state also act as a switch that turns the immune system off and on."
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  • plasticity, the ongoing process by which the complex networks and connections between neurons are wired and rewired during development and to support learning, memory, cognition, and motor function.
    • ryleighnyp
       
      I think it would be cool to look into the difference between this function in people's brains with and without learning disabilities.
  • high levels of norepinephrine, the microglia became inactive and were unable to respond to local injuries and pulled back from their role in rewiring brain networks.
katherine-medina

Native language differences in the structural connectome of the human brain - ScienceDi... - 1 views

  • elations (Friederici, 2011; Wilson et al., 2011). In this network, BA44 dominates syntactic processing while the IFS supports the processing of syntactic dependency relations in sentences
  • Phonetic information is processed in auditory areas in both hemispheres, and suprasegmental information,
  • dominant stem plus affix word
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  • In particular, left BA 44
  • und morphemes
  • This suggests that Arabic language processing is also driven by the core language systems built in the IFG, posterior temporal, and IPL regions. In addition, cross-linguistic electrophysiological comparisons of Arabic and Spanis
  • electrophysiological
  • 2.6. Statistics
  • and suggests that white matter plasticity in brain structure coincides with specific cognitive functions and processing demands of life-long use of a particular language. Thus, our findings contribute to our understanding of the mechanisms underlying experience-dependent white matter organization and adaptation in the human brain
  • (Malik-Moraleda et al.,
  • Native speakers of Semitic languages may rely more on regions for spatial cognition in the right hemisphere
  • .4. Di
  • Additionally, social cognitive and affective processes and other non-linguistic factors may also lead to differences in the brain. In particular, cultural values such as individualism and collectivism have been shown to influence brain function.
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    How primary languages affect the brain (Arabic & German)
  •  
    You will definitely want to use more than one tag when you save. Use all keywords, and be sure to click a few of the tags from the group dictionary that come up when you click to save to the HSR2023 group.
katherine-medina

The-ethics-of-experimenting-with-human-brain-tissue.pdf - 0 views

  •  
    A study that raises interesting questions on the ethics of growing human brain tissue.
katherine-medina

Increased 3-O-sulfated heparan sulfate in Alzheimer's disease brain is associated with ... - 1 views

  • Genetic factors contribute substantially to the pathological process of AD as demonstrated by the fact that the genetic heritability in AD is in the range of between 60 and 80% (10).
  • however, whether the variants alter the level of 3-OST-1 enzyme activity to change the structure of HS remains unknown
    • katherine-medina
       
      Good to note what exactly the article remains unsure about
  • The synthesis of additional 13C-labeled calibrants to cover these three reported 3-O-sulfated tetrasaccharides will be the subject for future study.
    • katherine-medina
       
      LOOK INTO THIS PART CAYSE THEY ARE SAYING THAT THEY ARE NOT FULLY SURE
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  • the elevation of total HS and the percentage of the 3-O-sulfated domain in HS.
  • HS and tau revealed that the sugar mainly interacts with the proline-rich region 2, a repeat domain 2 in tau protein
  • Further analysis of the distribution of 3-O-sulfated HS from different areas of AD brains will be of interest and the subject for a subsequent study.
  • Experimental design
    • katherine-medina
       
      READ THIS IF THIS TOPIC COMES BACK UP AGAIN
  •  
    A interesting study about a sulfate that suggests that Alzheimer's is genetic
ryleighnyp

Circadian clocks: Body parts respond to day and night independently from brain, studies... - 0 views

  • disable the entire circadian system of the mice
  • jump-start individual clocks
  • "No one realized that the liver or skin could be so directly affected by light."
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  • despite the shutdown of all other body clocks, including the central brain clock, the liver knew what time it was, responded to light changes as day shifted to night and maintained critical functions, such as preparing to digest food at mealtime and converting glucose to energy.
  • it's easy for people's circadian systems to get confused, he said. In turn, that can lead to depression, allergies, premature aging, cancer and other health problems. Further mice experiments could uncover ways to make human internal clocks "less misaligned,"
ryleighnyp

Real-time dialogue between experimenters and dreamers during REM sleep: Current Biology - 3 views

  • study by Strauss and Dehaene13Strauss M. Dehaene S. Detection of arithmetic violations during sleep.Sleep (Basel). 2019; 42: zsy232PubMed Google Scholar focused on electro- and magnetoencephalographic responses to spoken arithmetic equations (addition, multiplication, or subtraction operations).
  • study by Strauss and Dehaene13Strauss M. Dehaene S. Detection of arithmetic violations during sleep.Sleep (Basel). 2019; 42: zsy232PubMed Google Scholar focused on electro- and magnetoencephalographic responses to spoken arithmetic equations (addition, multiplication, or subtraction operations).
    • ryleighnyp
       
      Magnetoencephalography is a technique used to measure the magnetic fields produced by electrical activity in the brain. It is a non-invasive method that can provide high temporal and spatial resolution of brain activity. In the context of the research paper, the authors mention a study by Strauss and Dehaene that focused on electro- and magnetoencephalographic responses to spoken arithmetic equations during wakefulness and sleep. (Copilot)
  •  
    An interesting Sleep study about how scientist can communicate with people who are sleeping
izzy kelly

Study finds brain connectivity, memory improves in older adults after walking -- Scienc... - 0 views

  • They become disconnected, and as a result, people lose their ability to think clearly and remember things. We're demonstrating that exercise training strengthens these connections."
  • walking may decrease cerebral blood flow and improve brain function in older adults with mild cognitive impairment.
  •  
    correlation between exercise and memory. i'd be interested to see the long-term effects.
katherine-medina

Sci-Hub | Amyloid-β as a Blood Biomarker for Alzheimer's Disease: A Review of... - 0 views

    • katherine-medina
       
      So seeing as if scientists have mostly studied AB40-42, and 38 why don't they look at the other peptides under the name of AB.
    • katherine-medina
       
      I shall take note of this excerpt of the passage for future reference, "The discrep- 104 ancy between these two ultrasensitive assays may 105 be due to the different principle and design that 106 IMR assay could inhibit the oligomerization of A42 107 by the iron-chelating effect of magnetic Fe3O4 108 nanoparticles."
    • katherine-medina
       
      Important to see that they are figuring out that, "that there is a blood-brain transportation mechanism 261 for A and indicated that plasma A may be able to 262 reflect the brain A condition."
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    • katherine-medina
       
      Maybe I could look into the blood plasma levels AB1-40 and make it into a sort of predictor that could show if somehow may in future years live with some sort of Alzeheimer's Dementia.
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    A good look at what scientist have found about the presence of Amyloid B in the blood as a biomarker for Alzheimer's disease
katherine-medina

Cerebrospinal Fluid (CSF) Exchange with Artificial CSF Enriched with Mesenchymal Stem C... - 2 views

  • Moreover, toxicity of the CSF from patients affected by neurodegenerative diseases has been reported
  • Moreover, toxicity of the CSF from patients affected by neurodegenerative diseases has been reported
    • katherine-medina
       
      Good to note.
  • A beneficial effect was also demonstrated under Aβ neurotoxicity in PC12 cells
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  • n humans, it was reported that filtration of the CSF was beneficial in Guillain-Barré syndrome [
    • katherine-medina
       
      interesting that filtering the liquid can help people.
  • . MSCs produce a variety of neurogenic, neuroprotective, and immunomodulatory agents [15,16,17,18,19,20,21], and have been shown to induce beneficial effects when transplanted in EAE-mice [22,23,24,25], stroke [26,27], traumatic brain injury [28], Parkinson’s disease [29], schizophrenia, and autism [30,31] as well as increased neurogenesis in adult mice
  • Moreover, no studies using biologically enriched-aCSF for exchanging the CSF have been published.
    • katherine-medina
       
      That makes me want to search hard for studies that do involve the transfer, however I would have to figure out a way to create an experiment around this base idea of artificial CSF.
  • Artifical cerebrospinal fluid (aCSF) enriched with secretions of mesenchymal stem cells (MSCs) increases cell viability of PC12 and SH-SY5Y neuronal cell lines
  • While secretions of 2 days growing 10 or 100 K/mL MSCs in aCSF did not show an increase in PC12 cell viability
    • katherine-medina
       
      HMMM.... that is utterly fascinating the fact that after 2 days there seemed to be no change amongst the cell viability for both the 10 and 100 ml aCSF.
  • etions of 5 days growing MSCs in aCSF did show a significant increase in the PC12 cell viability relative to unenriched-aCSF treated cells
  • The principle of CSF exchange is similar to plasma exchange by plasmapheresis, which is in use for the treatment of autoimmune disorders
    • katherine-medina
       
      Did not know that it was similar to plasmapheresis.
  • a significant increase in cell viability was noticed in the enriched-aCSF (
  • A similar trend of increased cell viability by enriched-aCSF treatment was noticed in SH-SY5Y cells exposed to H2O2, but without reaching a statistical significance
  • while cell viability was reduced under Aβ, a significant increase in cell viability was noted in the enriched-aCSF treated cells
  • significantly suppressed in spleen lymphocytes treated with the enriched-aCSF compared to lymphocytes treated with (unenriched-) aCSF
    • katherine-medina
       
      This limiting of the lymphocytes is most likely a good thing under the guise of this paper because the suppression of lymphocytes likely helps with certain autoimmune disorders.
  • These results show that the “in/out” enriched-aCSF therapy was the most effective one, affecting both time of onset (EAE-control mice develop the disease at day 10 while the treated mice at day 14 post induction) and disease progression
  • Prolonged amelioration of EAE clinical symptoms during prolonged CSF exchange therapy: (in/out) enriched-aCSF protocol was more effective than (in) enriched-aCSF and (in/out) aCSF.
  • A trend of less demyelination in the LFB staining in the (in/out) enriched-aCSF treated- mice relative to the EAE-control mic
  • Our results show that elimination of endogenous CSF, and its replacement with MSC secretions enriched-aCSF ((in/out)-enriched-aCSF), delayed EAE onset and reduced the clinical score with indications of reduced axonal damage and demyelination.
  • in vitro and in vivo, has shown that MSCs can promote survival and axonal myelination in sensory dorsal root ganglia neurons and may be effective in non-inflammatory models of demyelination [
  • MSCs transplantation alone has been applied and tested with strong indications of beneficial effects in animal models of MS [22,23,24,25], stroke [26,27], traumatic brain injury [28], PD [29], schizophrenia, and autism
  • showing that local (intraventricular) transplantation of MSCs is more effective than intravenous administration
  • The feasibility of CSF exchange therapy reported here in the EAE model might possibly be applied to other neurodegenerative diseases of the CNS.
  • our approach of CSF exchange therapy could be beneficial for fully developed neurological diseases through a repeated application of the proposed CSF exchange protocol
    • katherine-medina
       
      A good thing to recognize and note for future reference.
  • 5. Conclusions
  •  
    This is a more recent study about the effects of artificial CSF infused with MSC in mice.
izzy kelly

Further link identified between autoimmunity and schizophrenia -- ScienceDaily - 0 views

  • Synaptic adhesion proteins are specialized proteins that bind to create physical connections between brain cells
  • utoantibodies against the synaptic protein neurexin 1α,
  • neurexin 1α can cause schizophrenia-related changes, at least in mice,
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  • which is expressed by one cell in the synapse and binds to proteins known as neuroligins on the other cell in the synapse,
  • autoantibodies is important for improving symptom control
  •  
    autoantibodies that target neurexin 1a could possibly play a role in the development of schizophrenia. possible treatment with identifying autoantibodies
Sean Nash

Race car drivers tend to blink at the same places in each lap - 4 views

  • The world goes dark for about one-fifth of a second every time you blink, a fraction of an instant that’s hardly noticeable to most people. But for a Formula One race car driver traveling up to 354 kilometers per hour, that one-fifth means almost 20 meters of lost vision
  • People are often thought to blink at random intervals, but researchers found that wasn’t the case for three Formula drivers.
  • the drivers tended to blink at the same parts of the course during each lap, cognitive neuroscientist Ryota Nishizono and colleagues report in the May 19 iScience
    • Sean Nash
       
      Interesting. So, do we do the same thing while driving around town? Could you design a method to record eye blinks as people drive known routes around town? We could simultaneously use the Arduino Science Journal app on the iPhone to also correlate physical data in a moving car like acceleration/deceleration, motion in X, Y, Z directions, etc. I wonder if we could find a correlation in everyday driving that could help from a safety perspective?
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  • He was surprised to find almost no literature on blinking behavior in active humans even though under extreme conditions like motor racing or cycling
    • Sean Nash
       
      OK, now this SCREAMS: "potential research idea."
  • Nishizono and colleagues mounted eye trackers on the helmets of three drivers and had them drive three Formula circuits
  • Where the drivers blinked was surprisingly predictable, the team found. The drivers had a shared pattern of blinking that had a strong connection with acceleration, such that drivers tended not to blink while changing speed or direction — like while on a curve in the track — but did blink while on relatively safer straightaways.
    • Sean Nash
       
      What sort of implications does this have for driving in key, known, busy interchanges in KC? Could we potentially provide data to show certain stretches of highway need more signage, etc? That could have civil engineering implications.
  • “We think of blinking as this nothing behavior,” he says, “but it’s not just wiping the eyes. Blinking is a part of our visual system.”
  • Nishizono next wants to explore what processes in the brain allow or inhibit blinking in a given moment, he says, and is also interested in how blinking behavior varies among the general population.
    • Sean Nash
       
      While the "brain" part might move beyond our feasibility, the potential of finding real correlations to driving patterns or routes is a completely different spin-off and one that could have really practical suggestive applications for city planners, etc.
katherine-medina

Frontiers | Dietary Polyphenols and Their Role in Oxidative Stress-Induced Human Diseas... - 1 views

  • phenolic acids, flavonoids, catechins, tannins, lignans, stilbenes and anthocyanidins
  • They possess antioxidant, chemopreventive and a wide range of pharmacological properties (
  • Over 8,000 polyphenols have been reported from plants, out of several hundreds of polyphenols exist in human diets
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  • Organic compounds bearing an aromatic ring with at least one hydroxyl group are termed as “phenolics”. In case, a compound possesses one or more aromatic rings having more than one hydroxyl group are called polyphenols (or polyphenolic compounds).
  • As per the C1-C6 or C3-C6 backbone, they are usually referred to as derivatives of benzoic acid or cinnamic acid
  • However, the role of the dietary polyphenols of their antioxidant abilities is still unclear.
    • katherine-medina
       
      How exactly is the role of antioxidants unclear?
  • Increased intake of foods containing polyphenols (for example, quercetin, epigallocatechin-3-gallate, resveratrol, cyanidin etc.) has been claimed to lower the incidence of a majority of chronic oxidative cellular damage, DNA damage, tissue inflammations, various cancers, viral/bacterial infections, and neurodegenerative diseases
    • katherine-medina
       
      So an increase of foods with natural extracts, so just plain vegetables that are not processed.
  • γ rays
    • katherine-medina
       
      I had no idea these were a thing.
  • This review specifically focuses a current understanding on the dietary sources of polyphenols and their protective effects including mechanisms of action against various major human diseases.
  • ROS when increased or excessively produced can cause oxidative changes/damages to all cellular macromolecules
  • Several antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), and reduced glutathione (GSH) aid in the removal of free radicals
  • Peroxynitrite can also destroy lipoproteins and causes lipid peroxidation of cell membranes
  • ROS can also affect protein synthesis and protein functions. Protein oxidation can result in amino acid modifications
  • Flavonoids are further classified into different subgroups based on their structures such as flavan-3-ols (examples: catechin, epicatechin, epigallocatechin), isoflavones (examples: genistein, genistin, daidzenin, daidzin, biochanin A, formononetin), flavones (examples: luteolin, apigenin, chrysin), flavonones (examples: hesperetin, naringenin), flavonols (examples: quercetin, kaempferol, galangin, fisetin, myricetin), flavononol (example: taxifolin), flavylium salts (examples: cyanidin, cyanin, pelargonidin), and flavanones (examples: hesperetin, naringenin, eriodictyol, isosakuranetin)
    • katherine-medina
       
      WOW so flavonoids have a large variety and classes.
  • urther, OS exerts deleterious effects on DNA leading to the formation of DNA lesions, which can result in genomic instability and consequently lead to cell death.
  • Polyphenols are found naturally in fruits and vegetables such as cereals, pulses, dried legumes, spinach, tomatoes, beans, nuts, peppermint, cinnamon, pears, cherries, oranges, apples, red wine, tea, cocoa, coffee and so on (Arts and Hollman, 2005; Scalbert et al., 2005). Polyphenols are classified into different groups depending on the number of aromatic (phenolic) rings they contain and the structural elements that connect these rings. They are broadly grouped into phenolic acids, flavonoids, stilbenes and lignans
    • katherine-medina
       
      SO each polyphenol has a different number of phenolic rings. What is the difference between the different polyphenols such as phenolic acid, flavonoids, stilbenes and lignans. I think that I should look at which of these groups are more effective when working with antibiotics as a way to aid them in the fight against resistant bacterias.
  • In plant derived polyphenolic compounds, flavonoids comprise the largest group with an approximately 10,000 natural analogues
  • Dietary supplements containing elevated amounts of flavonoids from strawberries, lettuce, or blueberries aid in the reversal of age-related discrepancies in the brain and behavioral control in aged rats
  • Tea catechins
    • katherine-medina
       
      I ha e looked into these a bit, but I did not know that they can help with neurodegenerative diseases.
  • reduced glutathione (GSH), and on membrane sulphydryl (-SH) group in humans has been reported by Maurya and Rizvi (2009).
  • OS can be the primary or secondary reason for various CVDs. Preclinical evidence support that OS is linked to a variety of CVDs, including atherosclerosis, ischemia, stroke, cardiomyopathy, cardiac hypertrophy, and hypertension, as well as congestive heart failure
  • Dietary flavonoids may reduce endothelial disorders linked with various risk factors for atherosclerosis before plaque creation
  • The polyphenols of Hibiscus sabdariffa weaken diabetic nephropathy in terms of serum lipid profile and kidney oxidative markers
  • . Studies suggest that a diet that includes regular consumption of fruits and vegetables (rich in polyphenols such as catechins, resveratrol, ellagic acid, naringenin, quercetin etc.) significantly lowers the risk of developing many cancers.
  • Black tea polyphenols like EGCG, theaflavins and thearubigins have potent anticancer properties
  • Anti-carcinogenic effects of resveratrol are due to the antioxidant function, which inhibits hydroperoxidase, Akt (PI3K-Akt) signaling pathway, matrix metalloprotease-9, NF-kB, protein kinase C, cyclooxygenase, focal adhesion kinase and Bcl-2 (B cell lymphoma 2) biomarkers/enzymes (Athar et al., 2007)
  • Increased OS may lead to the vulnerability of the infection and also triggers the malfunctioning of cellular metabolism
  • Resveratrol shows its anti-rheumatoid arthritis properties with reduced RA patients’ swelling, tenderness, and disease activity by lowering the biochemical indicators of inflammation like MMP-3, IL-6, ESR, C-reactive protein, and undercarboxylated osteocalcin
  •  
    A good overview about polyphenols.
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