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Related Concept Videos

Stages of Sleep01:22

Stages of Sleep

Sleep progresses through distinct stages, each characterized by specific brain wave patterns and physiological responses ranging from wakefulness to stages of non-rapid eye movement, known as non-REM, to rapid eye movement, referred to as REM. Understanding these stages helps in recognizing how sleep supports various bodily and cognitive functions.
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
Dreaming01:30

Dreaming

Sigmund Freud revolutionized our understanding of dreams by proposing that they are a window into the unconscious mind. According to Freud, dreams are not mere stories our minds create while we sleep but are profoundly meaningful narratives about our hidden desires and fears. He introduced two key concepts: manifest content and latent content. The manifest content is the actual content and imagery of the dream — what we remember when we wake up. The latent content, however, represents the...
Sleep-Wake Cycles01:24

Sleep-Wake Cycles

Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and  rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
Nightmares and Night Terrors01:18

Nightmares and Night Terrors

Nightmares and night terrors represent two distinct types of sleep disturbances that differ in timing, characteristics, and the sleeper's recall of the event. Nightmares are vivid, disturbing dreams that usually awaken the sleeper from REM sleep, a stage of sleep where brain activity is high, and dreams are most frequent. Upon awakening, individuals often have detailed recollections of their nightmares, which can include themes of threats to survival, security, or self-esteem.
Nightmares often...
REM Sleep Behavior Disorder01:15

REM Sleep Behavior Disorder

REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
RBD is significantly associated with...
Understanding Sleep01:11

Understanding Sleep

Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...

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Noninvasive EEG Recordings from Freely Moving Piglets
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Published on: July 13, 2018

Sweet DREAMs for Hippo.

Frederick A Dick1, Joe S Mymryk

  • 1London Regional Cancer Program, London, Ontario N6A 4L6, Canada. fdick@uwo.ca

Genes & Development
|May 4, 2011
PubMed
Summary
This summary is machine-generated.

The Hippo pathway and retinoblastoma proteins control cell growth. Recent studies reveal their coordination, offering new insights into cancer formation and potential therapeutic targets for cell proliferation disorders.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Oncology

Background:

  • The Hippo pathway is a key regulator of organ size and cellular proliferation.
  • The retinoblastoma (RB) protein family controls cell cycle progression, particularly the G0/G1 phase.
  • Dysregulation of both the Hippo pathway and RB proteins is implicated in cancer development.

Purpose of the Study:

  • To elucidate the coordination mechanisms between the Hippo pathway and the retinoblastoma protein family.
  • To understand how this interplay influences cellular proliferation.
  • To discuss the implications for cancer biology and identify new research questions.

Main Methods:

  • Review and discussion of findings from three recent studies published in Genes & Development.
  • Analysis of molecular crosstalk and regulatory feedback loops between the Hippo and RB pathways.
  • Integration of genetic and biochemical data to infer pathway interactions.

Main Results:

  • Identification of specific molecular links and regulatory events connecting the Hippo and RB pathways.
  • Demonstration of how these pathways cooperate to control cell cycle entry and exit.
  • Highlighting the consequences of disrupted coordination for maintaining tissue homeostasis.

Conclusions:

  • The coordinated action of the Hippo and RB pathways is crucial for preventing uncontrolled cell proliferation.
  • Understanding this interplay provides critical insights into the pathogenesis of various cancers.
  • Further research into this cross-talk may reveal novel therapeutic strategies for cancer treatment.