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Related Concept Videos

Phosphoinositides and PIPs01:42

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Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
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Neurotransmitters are essential chemical messengers within the nervous system, facilitating the communication between neurons. These chemical messengers, varying in function and effect, are critical for sustaining various aspects of neurological health and emotional well-being.
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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
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Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the  phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
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Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function.
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Related Experiment Video

Updated: Apr 18, 2026

Absolute Quantitation of Inositol Pyrophosphates by Capillary Electrophoresis Electrospray Ionization Mass Spectrometry
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[Cognitive Function and Calcium. The relationship between inositol phosphates and brain function].

Eiichiro Nagata1

  • 1Department of Neurology, Tokai University School of Medicine, Japan.

Clinical Calcium
|January 31, 2015
PubMed
Summary
This summary is machine-generated.

Inositol phosphates, like inositol 1,4,5-trisphosphate (IP3), are crucial for cell signaling and brain function. Inositol hexakisphosphate kinase (IP6K) is vital in neurodegenerative disorders by phosphorylating IP6 to IP7.

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Identification of Inositol Phosphate or Phosphoinositide Interacting Proteins by Affinity Chromatography Coupled to Western Blot or Mass Spectrometry
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Extraction and Quantification of Soluble, Radiolabeled Inositol Polyphosphates from Different Plant Species using SAX-HPLC
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Identification of Inositol Phosphate or Phosphoinositide Interacting Proteins by Affinity Chromatography Coupled to Western Blot or Mass Spectrometry
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Extraction and Quantification of Soluble, Radiolabeled Inositol Polyphosphates from Different Plant Species using SAX-HPLC
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Area of Science:

  • Biochemistry
  • Cell Biology
  • Neuroscience

Context:

  • Inositol phosphates are signaling molecules derived from membrane lipids.
  • Inositol 1,4,5-trisphosphate (IP3) regulates intracellular calcium release.
  • IP3 and other inositol polyphosphates (IP4-IP7) are implicated in brain function and neurodegenerative diseases.

Purpose:

  • To explore the roles of various inositol phosphates in cellular processes.
  • To highlight the significance of inositol hexakisphosphate kinase (IP6K) in neurodegeneration.

Summary:

  • Inositol phosphates are synthesized by adding phosphate groups to an inositol ring.
  • IP3 mediates calcium release via IP3 receptors, impacting brain functions.
  • Inositol polyphosphates (IP4-IP7) and the enzyme IP6K, which phosphorylates IP6 to IP7, are critical in neurodegenerative disease pathophysiology.

Impact:

  • Understanding inositol phosphate metabolism offers insights into neurodegenerative disease mechanisms.
  • Identifying the role of IP6K in neurodegeneration may lead to therapeutic targets.
  • This research underscores the importance of inositol phosphates in cellular signaling and neurological health.