Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Continuing the search for cholinergic factors in cognitive dysfunction

R W Russell1

  • 1Center for the Neurobiology of Learning and Memory, University of California, Irvine 92717-3800, USA.

Life Sciences
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Defense of mates: a territory departure rule for male tree lizards following sex-ratio manipulation.

Oecologia·2017
Same author

Experimental studies of hereditary influences on behaviour.

The Eugenics review·2011
Same author

Microangiography in retinal vascular occlusion [abstract].

Proceedings of the Royal Society of Medicine·2010
Same author

Monochromator-interferometer combination for submillimeter astronomical spectrometry from aircraft.

Applied optics·2010
Same author

Influence of selection for breast muscle mass on myosin isoform composition and metabolism of deep pectoralis muscles of male and female turkeys.

Poultry science·2002
Same author

Sphingomyelin metabolism in rat liver after chronic dietary replacement of choline by N-aminodeanol.

Journal of lipid research·1997
Same journal

Corrigendum to "Adipose stem cells-derived microvesicles and chicken egg-derived exosomes attenuate cardiac ischemia/reperfusion injury through AKT/ERK/Nrf2/HO-1 axis to inhibit apoptosis and inflammation and restore autophagy" [Life Sci. 395 (2026) 124364].

Life sciences·2026
Same journal

MAGED1 stabilizes NEUROD1 to promote Per3 expression in the pineal gland.

Life sciences·2026
Same journal

TNF-centered network pharmacology and molecular modeling of selected Andrographis paniculata compounds in hypertension.

Life sciences·2026
Same journal

Retraction notice to "Beneficial effect of Calculus Bovis Sativus on 17α-ethynylestradiol-induced cholestasis in the rat" [Life Sci. 113 (2014) 22-30].

Life sciences·2026
Same journal

Soluble PD-1 drives renal fibrosis in CKD by disrupting immune homeostasis: Therapeutic mitigation via a targeted sPD-1 sequestration strategy.

Life sciences·2026
Same journal

METTL1 promotes hepatic steatosis by mediating m<sup>7</sup>G modification of ALOX15B mRNA.

Life sciences·2026
See all related articles

Progressive degenerative dementia (PDD) may stem from cholinergic system changes. While receptor downregulation is temporary, chronic hypocholinergic states cause lasting memory loss due to structural brain changes.

Area of Science:

  • Neuroscience
  • Biochemistry

Background:

  • Cholinergic system plays a crucial role in cognitive functions, particularly memory.
  • Progressive degenerative dementia (PDD) is characterized by cognitive decline and memory impairment.
  • Aging can affect cholinergic neurotransmission, potentially impacting cognitive health.

Purpose of the Study:

  • To investigate three hypotheses concerning cholinergic mechanisms in PDD development.
  • To examine the impact of muscarinic acetylcholine receptor (mAChR) downregulation on cognitive function.
  • To explore the consequences of chronic hypocholinergic states and impaired phospholipid metabolism on brain structure and memory.

Main Methods:

  • Experimental downregulation of mAChRs in aging models.
  • Chronic administration of a false cholinergic transmitter to weanling rats to induce a hypocholinergic state.

Related Experiment Videos

  • Assessment of cognitive functions, biochemical markers, and physiological processes.
  • Investigation of phospholipid metabolism, specifically sphingomyelin and ceramide, in relation to apoptosis.

    • Main Results:

    • Downregulation of mAChRs to 10% of normal levels resulted in temporary cognitive deficits, with the system showing recovery capabilities.
    • Chronic hypocholinergic state in rats led to persistent cognitive dysfunction and memory impairment, even after returning to a normal diet.
    • These persistent behavioral deficits suggest underlying structural changes in the central nervous system (CNS).

    Conclusions:

    • The cholinergic system exhibits some capacity for repair following receptor downregulation.
    • Chronic hypocholinergic states can induce lasting cognitive impairments, potentially mediated by structural CNS alterations.
    • Impaired phospholipid metabolism, affecting sphingomyelin and leading to increased ceramide, is a potential mechanism for cell loss and PDD development.