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関連する概念動画

Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

1.8K
Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
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Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

37
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
37
Heart Failure IV: Classification and Diagnostic Evaluation01:30

Heart Failure IV: Classification and Diagnostic Evaluation

32
Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...
32
Heart Failure I: Introduction01:27

Heart Failure I: Introduction

52
Heart failure refers to a clinical syndrome caused by structural or functional cardiac disorders that prevent the heart from pumping an adequate amount of blood to meet the body's metabolic needs. This condition often arises from myocardial infarction or ischemia, leading to decreased cardiac output, reduced tissue perfusion, impaired gas exchange, fluid volume imbalance, and decreased functional ability.Heart failure can result from disruptions in the mechanisms that regulate cardiac output...
52
Heart Failure VII: Nursing Interventions01:30

Heart Failure VII: Nursing Interventions

139
The first step in nursing management of a patient with heart failure involves thoroughly assessing the patient's medical history.Subjective Data: Obtain the patient's medical history of coronary artery disease, hypertension, myocardial infarction, and symptoms like dyspnea, orthopnea, and paroxysmal nocturnal dyspnea.Objective Data: Conduct a physical examination to identify findings such as jugular vein distention, pulmonary crackles, tachycardia, murmurs, peripheral edema, and vital signs,...
139
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

21
Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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In Vitro Differentiation of Human Mesenchymal Stem Cells into Functional Cardiomyocyte-like Cells
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冠動脈疾患による心不全を患っている患者と,冠動脈疾患を患っていない患者を,遺伝子発現によって区別できますか?

Józefa Dąbek1, Joanna Głogowska-Ligus2, Mieczysław Piechota3

  • 1Department of Cardiology, Faculty of Health Sciences in Katowice, Medical University of Silesia, Katowice, Poland.

Journal of cellular and molecular medicine
|September 3, 2025
PubMed
まとめ

TGF-β1遺伝子とそのタイプIII受容体の転写活性は,冠動脈疾患の心不全患者において低い. この発見は病気の進行と解消を評価するのに役立ちます.

キーワード:
心不全リスク要因変換成長因子 β1

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High Efficiency Differentiation of Human Pluripotent Stem Cells to Cardiomyocytes and Characterization by Flow Cytometry
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Gene Transfer for Ischemic Heart Failure in a Preclinical Model
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Gene Transfer for Ischemic Heart Failure in a Preclinical Model
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科学分野:

  • 心血管生物学
  • 分子医学
  • 遺伝子発現分析

背景:

  • 冠動脈疾患 (CAD) は心不全 (HF) の主要な原因である.
  • 変形成長因子β1 (TGF-β1) は心臓の改造と線維症に作用する.
  • CADに関連するHFの遺伝子発現を理解することは,予後にとても重要です.

研究 の 目的:

  • HFによるCADとHFのないCADの患者におけるTGF-β1遺伝子と受容体の転写活性を比較する.
  • 遺伝子発現に対するリスク因子,HF段階,冠動脈疾患の重度の影響を分析する.

主な方法:

  • 定量逆転写ポリメラーゼ連鎖反応 (QRT-PCR) が使用された.
  • 研究には,高度なHF (NYHA III- IV) の患者105人と,HFのないCADの患者52人が含まれていました.
  • 分析では,心筋梗塞,高血圧,肥満,家族歴などのリスク要因を考慮した.

主要な成果:

  • 高度なHF患者では,TGF-β1とIII型受容体の転写活性が著しく低下することが観察されました.
  • 危険因子 (高血圧,肥満,以前の心筋梗塞,家族歴) は,HF患者におけるTGF- β1発現の低下と関連していた.
  • すべてのTGF-β1受容体遺伝子は,リスク因子を持つHF患者で変異した転写活性を示した.

結論:

  • HF患者におけるTGF-β1およびIII型受容体発現の低下は,疾患進行を示唆する可能性があります.
  • これらの発見は,TGF-β1経路の変化が,CADにおけるHF発症に関連していることを示唆している.
  • TGF-β1の転写活動は,HFへのCAD進行とその状態を評価するための臨床マーカーとして機能する.