BIOS5130 Week 11 Lecture Part 2 Slides

Alzheimer’s Disease Research Example


Presenter: Dr. Emma HargreavesFocus: Alzheimer’s disease as a critical case study in neurology to explore the complexities of the condition and the implications for cognitive health.

Week 11 Lecture

Topic: Importance of research in understanding Alzheimer's pathology.

  • Emphasis on current findings in Alzheimer’s research which include the roles of amyloid plaques and tau tangles in brain degeneration.

  • Discussion of genetic and environmental risk factors that contribute to the development of Alzheimer’s.

Cold Water Swimming

Topic: Effects of Cold Water Swimming on the Body

  • Source: "Cold Water Swimming—Benefits and Risks: A Narrative Review" by PMC (NIH.gov)

  • Overview: Detailed analysis of physiological changes such as increased metabolic rate, enhanced immune response, and improved mood through mechanisms involving endorphin release and circulation adaptation during cold exposure.

Medical Applications of the Cold Response

Charles E. Drew (1916-1987)

  • Developed the Profound Hypothermia Apparatus which instrumentalized controlled hypothermic techniques to enhance patient survival rates during heart surgeries.

  • His innovations paved the way for further advancements in surgical and emergency care methodologies.

Hibernation and Neurodegeneration

Research Study: Investigates how RBM3 mediates structural plasticity and exhibits protective effects of cooling in neurodegenerative conditions.

Key Findings:

  • Synaptic plasticity: Essential for maintaining cognitive functions such as learning and memory, significantly influenced by environmental temperature.

  • Hibernating mammals: Exhibit unique synaptic remodeling processes that occur during cooling and subsequent rewarming phases, suggesting potential mechanisms for enhancing neuroprotection during neurodegeneration.

  • Cold-shock proteins (CSPs): In particular, RBM3 is crucial, with its elevated expression linked to a reduction in synaptic loss in conditions like Alzheimer's. Disruption in RBM3 function correlates with increased synaptic deterioration, underscoring its therapeutic potential.

Conclusion:

  • This research highlights the innovative approaches to leverage cold exposure as a therapeutic strategy to combat neurodegenerative diseases, including Alzheimer's, emphasizing the need for further exploration of CSPs in clinical settings.

Mechanism of Cooling-Induced Regulation

Research: John R. P. Knight et al. proposed mechanisms that detail the regulation of translation elongation during cooling conditions.

  • The role of RBM3 in modulating neuroprotection and facilitating synaptic repair processes underlies the potential for inducible responses to temperature changes.

  • Cooling Influence: Induces alterations in the translatome that affect overall protein synthesis, which could be crucial in therapeutic development.

RTN3 and Cold Shock Response

  • RTN3: Identified as a novel protein that is selectively upregulated by cold exposure, it plays a significant role in neuroprotection, potentially acting downstream of RBM3 pathways.

  • Emerging findings suggest that enhancing RTN3 synthesis could be a viable target for future therapeutic interventions in neurodegenerative diseases.

Cold Water Swimmers and RBM3

  • Recent studies conducted by Cambridge University link cold water swimming practices with a notable increase in RBM3 levels in the bloodstream.

  • This suggests the possibility of protective effects against the onset or progression of neurodegenerative diseases like dementia, reiterating the relevance of cold-shock proteins in cellular resilience against neuron damage.

mRNA Coding Capacity

  • Codon Information: The genetic coding system consists of 64 possible codons derived from a triplet structure constituted by four nucleotide bases, impacting how proteins are synthesized in response to environmental stimuli.

Specific Regulation of Translation Elongation

  • The abundance and rarity of specific tRNAs affect translation efficiency, with rarer tRNAs leading to prolonged binding times during protein synthesis.

  • This regulation is pivotal for adjusting protein synthesis to align with cellular stress responses and environmental conditions.

RTN3 Isoform 3 and Codon Usage

  • Codon Usage Analysis: In-depth comparisons of modified sequences of RTN3 were conducted to establish the identity of the fastest to slowest codons based on their frequency of usage, shedding light on translational efficiency.

RTN3 Expression in Cell Lines

  • Results from experiments measuring RTN3 expression levels across various modified cell lines, normalized to actin, showcase different responses to treatment conditions.

  • Graphical data illustrates statistical variations, with significance determined through one-way ANOVA and Tukey pairwise comparisons, emphasizing findings robustness.

Drug Development Against Cold-Shock Response

  • A growing field explores potential pharmacological agents designed to mimic the benefits of cold-shock responses. These agents aim to confer neuroprotective advantages in developing treatment pathways for neurodegeneration.

Questions

  • Engagement Opportunity: Encouraging students to reflect upon and discuss the presented topics promotes deeper understanding and critical thinking regarding the implications of cold exposure in neuroprotection and Alzheimer’s disease research.