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Related Concept Videos

Chambers of the Heart01:16

Chambers of the Heart

The human heart is a complex organ made up of four chambers: the right and left atria and the right and left ventricles. These internal chambers are separated by partitions known as the interatrial and interventricular septa. The exterior of the heart features a groove known as the coronary sulcus that demarcates the atria from the ventricles, while the anterior and posterior interventricular sulci distinguish between the two ventricles.
Deoxygenated blood from the body is received in the right...
Pancreas01:19

Pancreas

The pancreas, an essential organ in the human body, is a pinkish-gray elongated structure located posterior to the stomach. It extends laterally from the duodenum towards the spleen and is firmly bound to the posterior wall of the abdominal cavity. The organ's surface has a lumpy, lobular texture that gives it a unique appearance.
The broad head of the pancreas lies within the loop formed by the duodenum, while its slender body reaches towards the spleen. The tail of the pancreas is short and...
Pulse01:16

Pulse

When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical indicator...
Pulse01:05

Pulse

The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls between...
Passionate Love01:26

Passionate Love

Passionate love is a powerful emotional and physiological state that plays a significant role in human relationships. It is characterized by an intense longing for connection with another person and is often considered the foundation of romantic attraction. Psychological research identifies three fundamental components of passionate love: cognition, emotion, and behavior.Cognitive AspectsCognition in passionate love involves idealization and persistent thoughts about the loved one. Individuals...
P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...

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Related Experiment Video

Updated: May 9, 2026

Infection of In Vivo and In Vitro Pines with the Pinewood Nematode Bursaphelenchus xylophilus and Isolation of Induced Volatiles
08:42

Infection of In Vivo and In Vitro Pines with the Pinewood Nematode Bursaphelenchus xylophilus and Isolation of Induced Volatiles

Published on: September 27, 2024

Keep PNUTS in your heart.

Francesco S Loffredo1, James R Pancoast, Richard T Lee

  • 1Harvard Stem Cell Institute, The Brigham Regenerative Medicine Center, Brigham and Women's Hospital, Boston, MA, USA.

Circulation Research
|July 9, 2013
PubMed
Summary

Aging hearts are not inevitably declining. MicroRNAs (miRNAs) play a key role in regulating cardiac aging and function, offering new insights into cardiovascular health in the elderly.

Area of Science:

  • Cardiovascular Science
  • Molecular Biology
  • Gerontology

Background:

  • Aging is a primary risk factor for cardiovascular diseases.
  • The molecular mechanisms underlying age-related cardiac dysfunction remain incompletely understood.
  • The role of microRNAs in cardiac aging is an emerging area of research.

Purpose of the Study:

  • To investigate the role of microRNAs (miRNAs) in the aging process of the heart.
  • To identify molecular factors regulating age-related changes in cardiac physiology.
  • To challenge the notion that cardiac aging is an unavoidable process.

Main Methods:

  • Analysis of microRNA expression profiles in aged cardiac tissue.
  • Functional studies to assess the impact of specific miRNAs on cardiac cells.

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Published on: February 28, 2025

Related Experiment Videos

Last Updated: May 9, 2026

Infection of In Vivo and In Vitro Pines with the Pinewood Nematode Bursaphelenchus xylophilus and Isolation of Induced Volatiles
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In vivo and In vitro Infection of Potato Roots with Plant Parasitic Nematodes for the Assessment of Induced Structural Changes

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  • Correlation of miRNA levels with age-related cardiac functional parameters.

    • Main Results:

    • Specific microRNAs were identified as key regulators of cardiac aging.
    • These microRNAs influence molecular pathways involved in cardiac physiology.
    • The findings suggest that cardiac aging may be a modifiable process.

    Conclusions:

    • MicroRNAs are significant contributors to cardiac aging and function.
    • Targeting specific miRNAs could offer novel therapeutic strategies for age-related cardiovascular diseases.
    • The study challenges the inevitability of cardiac aging, opening new avenues for research.