p(HGNCGENEFAMILY:"Cholinergic receptors muscarinic")

Entity

Name

Cholinergic receptors muscarinic

Namespace

hgnc.genefamily

Namespace Version

20181015

Namespace URL

https://raw.githubusercontent.com/pharmacome/terminology/3074b85b858455d8eeb76cfcdef685ced19bbe11/external/hgnc.genefamily-names.belns

The metabotropic receptors are second messenger, G protein-coupled seven-transmembrane proteins. They are classically defined as being activated by muscarine, a toxin from the mushroom Amanita muscaria, and inhibited by atropine, a toxin from Atropa belladonna, a member of the nightshade family. Both toxins cross the blood-brain barrier poorly and were discovered primarily from their influences on postganglionic parasympathetic nervous system functions. Activation of muscarinic AChRs is relatively slow (milliseconds to seconds) and, depending on the subtypes present (M1- M5), they directly alter cellular homeostasis of phospholipase C, inositol trisphosphate, cAMP, and free calcium. PubMed:19126755

Acetylcholine receptors (AChRs), like many other ligand-activated neurotransmitter receptors, consist of two major subtypes: the metabotropic muscarinic receptors and the ionotropic nicotinic receptors. Both share the property of being activated by the endogenous neurotransmitter acetylcholine (ACh), and they are expressed by both neuronal and nonneuronal cells throughout the body (8, 113, 142, 184). PubMed:19126755

The metabotropic receptors are second messenger, G protein-coupled seven-transmembrane proteins. They are classically defined as being activated by muscarine, a toxin from the mushroom Amanita muscaria, and inhibited by atropine, a toxin from Atropa belladonna, a member of the nightshade family. Both toxins cross the blood-brain barrier poorly and were discovered primarily from their influences on postganglionic parasympathetic nervous system functions. Activation of muscarinic AChRs is relatively slow (milliseconds to seconds) and, depending on the subtypes present (M1- M5), they directly alter cellular homeostasis of phospholipase C, inositol trisphosphate, cAMP, and free calcium. PubMed:19126755

Furthermore, pharmacological dissection of nicotine’s influence on cell cycle progression, apoptosis, and differentiation (43) indicate that alpha7 nAChRs expressed in keratynocytes are important. Other receptors are clearly involved in this process, since atropine, a muscarinic and sometimes nAChR inhibitor (531, 532), reduces cell adhesion through decreasing desmoligein expression. PubMed:19126755

The third important hallmark of AD is cholinergic hypofunction. The neurotransmitter acetylcholine (ACh) exerts its physiological functions by activating either ionotropic nicotinic ACh receptors (nAChRs) or metabotropic muscarinic ACh receptors (mAChRs). It has been reported that in AD brains there are (1) reduced choline acetyltransferase levels accompanied by decreased ACh synthesis; (2) significant loss of cholinergic neurons; (3) reduction in the numbers of postsynaptic neurons accessible to ACh; (4) cholinergic neuronal and axonal abnormalities; and (5) reduction in nAChR levels PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Recent evidence indicates that cholinergic hypofunction is closely linked to Abeta and tau pathologies[20]. As a major receptor group for ACh, mAChRs have also been implicated in the pathophysiology of AD. PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Alzheimer’s disease is characterized by progressive cognitive decline, accompanied by a loss of neurons and synapses — especially cholinergic synapses — in the basal forebrain, cerebral cortex and hippocampus126 and by a substantial reduction in both muscarinic and nicotinic AChR expression127. PubMed:19721446

The metabotropic receptors are second messenger, G protein-coupled seven-transmembrane proteins. They are classically defined as being activated by muscarine, a toxin from the mushroom Amanita muscaria, and inhibited by atropine, a toxin from Atropa belladonna, a member of the nightshade family. Both toxins cross the blood-brain barrier poorly and were discovered primarily from their influences on postganglionic parasympathetic nervous system functions. Activation of muscarinic AChRs is relatively slow (milliseconds to seconds) and, depending on the subtypes present (M1- M5), they directly alter cellular homeostasis of phospholipase C, inositol trisphosphate, cAMP, and free calcium. PubMed:19126755

The metabotropic receptors are second messenger, G protein-coupled seven-transmembrane proteins. They are classically defined as being activated by muscarine, a toxin from the mushroom Amanita muscaria, and inhibited by atropine, a toxin from Atropa belladonna, a member of the nightshade family. Both toxins cross the blood-brain barrier poorly and were discovered primarily from their influences on postganglionic parasympathetic nervous system functions. Activation of muscarinic AChRs is relatively slow (milliseconds to seconds) and, depending on the subtypes present (M1- M5), they directly alter cellular homeostasis of phospholipase C, inositol trisphosphate, cAMP, and free calcium. PubMed:19126755

The metabotropic receptors are second messenger, G protein-coupled seven-transmembrane proteins. They are classically defined as being activated by muscarine, a toxin from the mushroom Amanita muscaria, and inhibited by atropine, a toxin from Atropa belladonna, a member of the nightshade family. Both toxins cross the blood-brain barrier poorly and were discovered primarily from their influences on postganglionic parasympathetic nervous system functions. Activation of muscarinic AChRs is relatively slow (milliseconds to seconds) and, depending on the subtypes present (M1- M5), they directly alter cellular homeostasis of phospholipase C, inositol trisphosphate, cAMP, and free calcium. PubMed:19126755

The metabotropic receptors are second messenger, G protein-coupled seven-transmembrane proteins. They are classically defined as being activated by muscarine, a toxin from the mushroom Amanita muscaria, and inhibited by atropine, a toxin from Atropa belladonna, a member of the nightshade family. Both toxins cross the blood-brain barrier poorly and were discovered primarily from their influences on postganglionic parasympathetic nervous system functions. Activation of muscarinic AChRs is relatively slow (milliseconds to seconds) and, depending on the subtypes present (M1- M5), they directly alter cellular homeostasis of phospholipase C, inositol trisphosphate, cAMP, and free calcium. PubMed:19126755

Acetylcholine (ACh) is a neurotransmitter that modulates neuronal function in several areas of the CNS associated with AD and/or SZ pathology, including the striatum, cortex, hippocampus, and prefrontal cortex.5 ACh mediates its actions via two families of receptors, termed the muscarinic ACh receptors (mAChRs) and the nicotinic ACh receptors (nAChRs). PubMed:24511233

In addition, administration of nonselective muscarinic antagonists can produce or exacerbate cognitive deficits in animals,15 as well as in AD patients and both young and old control subjects,16,17 suggesting that mAChRs can directly modulate cognition. PubMed:24511233

Recent evidence indicates that cholinergic hypofunction is closely linked to Abeta and tau pathologies[20]. As a major receptor group for ACh, mAChRs have also been implicated in the pathophysiology of AD. PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

Members of the mAChR family are widely expressed in various regions in the central nervous system (CNS) and in the peripheral system. They play crucial roles in diverse physiological processes such as memory, attention, nociception, motor control, sleep-wake cycles, and cardiovascular, renal, and gastrointestinal functions PubMed:24590577

ACh is produced by the enzyme choline acetyltransferase and its actions are mediated through two types of acetylcholine receptors (AChRs) — the G protein-coupled muscarinic AChRs and the nicotinic AChRs (nAChRs). PubMed:19721446