GO:0003058 hormonal regulation of the force of heart contraction: Cardiac Inotropy, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0003058 describes how hormones modulate the force of heart muscle contraction, a process known as hormonal cardiac inotropy.
• Hormonal regulation of cardiac contractility involves adrenoceptors, slow calcium channels, and vasoactive peptides that tune myocardial performance.
• The slow Ca++ channels of myocardial cells are a key downstream target through which hormonal signals regulate the force of contraction.
• Melatonin and ALDH2 signaling can protect against cardiac anomalies via mitophagy regulation, linking hormonal pathways to contractile function.
• Vasoactive intestinal peptide exerts cardiovascular effects that include modulation of cardiac contractility and vascular tone.
• CRISPR-based models (knockout, point mutation, knock-in, overexpression) enable causal dissection of hormonal regulation of heart contraction force.
Description
Hormonal regulation of the force of heart contraction (GO:0003058) is the biological process in which hormones modulate the strength of heart muscle contraction. This process is central to cardiovascular physiology because the heart must continuously adjust its output in response to circulating endocrine signals, neural input, and metabolic demand. The QuickGO definition emphasizes that hormones are formed in small amounts in specialized cells and carried to target organs where they exert specific regulatory actions, and in the heart this translates into fine-tuned control of inotropy. Researchers study GO:0003058 to understand how endocrine signals such as catecholamines, vasoactive intestinal peptide, and melatonin-related pathways alter myocardial contractility at the cellular and molecular level. The slow Ca++ channels of myocardial cells are a major downstream effector system through which hormonal signals regulate the force of contraction. Because hormonal cardiac inotropy is disrupted in heart failure, hypertension, and other cardiovascular disorders, this GO term provides a framework for linking endocrine signaling to contractile performance.
hormonal regulation of the force of heart contraction At A Glance
| GO ID | GO:0003058 |
|---|---|
| GO term | hormonal regulation of the force of heart contraction |
| Ontology | biological_process |
| Synonym | hormonal cardiac inotropy; hormonal regulation of the force of heart muscle contraction |
| Major function | Modulation of the force of heart muscle contraction by hormones |
| Definition source | QuickGO definition: hormones formed in small amounts in specialized cells and carried to target cells exert specific regulatory action on the force of heart contraction |
| Related physiology | Cardiac inotropy, adrenoceptor signaling, slow Ca++ channel regulation, vasoactive peptide effects |
| Key downstream effectors | Myocardial slow Ca++ channels, adrenoceptors, vasoactive intestinal peptide receptors, melatonin/ALDH2 pathways |
| Research relevance | Heart failure, hypertension, cardiac protection, endocrine-cardiovascular crosstalk |
What Is GO:0003058?
In our own words, GO:0003058 describes the process by which hormones, acting as small-molecule or peptide signals released from specialized cells and transported to the heart, change the force with which cardiac muscle contracts. This includes hormonal cardiac inotropy, where endocrine factors modulate the strength of heart muscle contraction rather than merely initiating or inhibiting contraction. The process encompasses hormone-receptor interactions on cardiac cells, downstream signaling that alters calcium handling and myofilament sensitivity, and the resulting change in contractile force.
Why Is hormonal regulation of the force of heart contraction Important in Cell Biology?
Hormonal regulation of the force of heart contraction is important because it determines how the heart adapts its pumping strength to changing physiological demands, and its dysregulation contributes to major cardiovascular diseases. Understanding GO:0003058 helps researchers identify hormonal pathways that can be targeted to improve cardiac contractility in heart failure or to prevent maladaptive inotropic responses in hypertension. The process also intersects with protective signaling such as melatonin-ALDH2-mediated mitophagy regulation, offering therapeutic hypotheses for cardiac anomalies.
• Hormonal cardiac inotropy is a core mechanism for matching cardiac output to systemic demand.
• Adrenoceptor-mediated hormonal signals directly influence the force of heart contraction.
• Slow Ca++ channels in myocardial cells are key effectors of hormonal regulation of contractility.
• Vasoactive intestinal peptide has cardiovascular effects that include modulation of cardiac function.
• Melatonin and ALDH2 signaling protect against cardiac anomalies through mitophagy regulation, linking hormonal pathways to contractile integrity.
• Dysregulated hormonal inotropy contributes to heart failure and hypertension.
• Hormonal regulation of contraction force is relevant to neuromuscular and cardiac disorders.
• Mechanical interactions in hypertrophied myocardium can alter contractile behavior, adding a biomechanical dimension to hormonal regulation.
• Exercise and hormonal modulation can improve cardiovascular and related symptoms, highlighting systemic endocrine effects on heart function.
• CRISPR models enable causal testing of hormonal regulators of cardiac contractility.
What Happens During hormonal regulation of the force of heart contraction?
Hormone release and receptor activation
In simple terms: Hormones are released into the blood and bind to receptors on heart cells, starting a signal.
Hormonal regulation of the force of heart contraction begins when hormones formed in specialized cells are carried to the heart and bind to specific receptors on cardiac cells. The influence of hormonal and neuronal factors on rat heart adrenoceptors demonstrates that adrenoceptors are key targets for hormonal modulation of cardiac function. This receptor activation is the first step that ultimately modulates the force of heart muscle contraction.
Adrenoceptor-mediated signaling
In simple terms: Adrenaline-like hormones lock onto heart receptors and change how strongly the heart squeezes.
Adrenoceptors on cardiac cells mediate hormonal effects on the force of contraction, as shown by studies on the influence of hormonal and neuronal factors on rat heart adrenoceptors. These receptors translate hormonal signals into intracellular changes that alter contractile strength. The interplay between hormonal and neuronal inputs ensures fine-tuned control of cardiac inotropy.
Modulation of slow Ca++ channels
In simple terms: Hormones change calcium channels in heart cells, which controls how much calcium enters and how hard the heart contracts.
The slow Ca++ channels of myocardial cells are regulated by hormonal and other signals, and this regulation directly affects the force of heart contraction. Sperelakis and colleagues described how these channels are modulated, providing a mechanistic basis for hormonal cardiac inotropy. Calcium influx through slow Ca++ channels is a critical determinant of contractile force, making these channels a central downstream node in GO:0003058.
Vasoactive peptide effects on cardiac contractility
In simple terms: Peptide hormones like VIP can change heart function and blood vessel tone.
Vasoactive intestinal peptide (VIP) exerts cardiovascular effects, including modulation of cardiac function and vascular tone. Henning and Sawmiller reviewed the cardiovascular effects of VIP, highlighting its role in regulating cardiac performance. Such peptide hormones contribute to the hormonal regulation of the force of heart contraction by acting on cardiac and vascular targets.
Protective hormonal signaling and mitophagy
In simple terms: Some hormones protect the heart by helping cells clean up damaged mitochondria.
Melatonin-induced protection against APP/PS1 mutation-prompted cardiac anomalies involves ALDH2 and cGAS-STING-TBK1-mediated regulation of mitophagy. This demonstrates that hormonal signals can protect cardiac function through mitochondrial quality control, indirectly supporting the force of heart contraction. Wang and colleagues showed that ALDH2 contributes to melatonin-induced protection, linking hormonal pathways to cardiac structural and functional integrity.
Mechanical and structural influences on contractile force
In simple terms: The physical structure of heart muscle, especially when thickened, affects how strongly it can contract.
The phenomena of mechanical interaction of segments of hypertrophied myocardium can influence contractile behavior, adding a structural dimension to the regulation of contraction force. Balakin and colleagues described mechanical interactions in hypertrophied myocardium that may modulate the effective force of contraction. These biomechanical factors can interact with hormonal signals to shape overall cardiac inotropy.
Key Genes Involved in GO:0003058 hormonal regulation of the force of heart contraction
The following genes and proteins are involved in hormonal regulation of the force of heart contraction, based on the verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ADRB1 | Beta-1 adrenoceptor mediating catecholamine effects on cardiac contractility | Target for studying hormonal cardiac inotropy |
| ADRB2 | Beta-2 adrenoceptor contributing to adrenergic modulation of heart function | Relevant to hormonal and neuronal factor influence on heart adrenoceptors |
| ALDH2 | Mitochondrial aldehyde dehydrogenase involved in melatonin-induced cardiac protection | Links hormonal signaling to mitophagy and cardiac anomalies |
| VIP | Vasoactive intestinal peptide with cardiovascular effects | Modulates cardiac function and vascular tone |
| CACNA1C | Alpha-1C subunit of voltage-dependent calcium channel, contributing to slow Ca++ channel function | Central to calcium-dependent regulation of contraction force |
| CACNA1D | Alpha-1D subunit of voltage-dependent calcium channel | Contributes to slow Ca++ channel regulation in myocardial cells |
| EPHB4 | Ephrin receptor involved in vascular smooth muscle contractility | EPHB4 deletion leads to hypotension, linking contractility regulation to vascular tone |
| APP | Amyloid precursor protein; APP/PS1 mutation prompts cardiac anomalies | Model for hormonal protection against cardiac dysfunction |
| PS1 | Presenilin-1; APP/PS1 mutation used in cardiac anomaly models | Relevant to melatonin-ALDH2 protective pathways |
| cGAS | Cytosolic DNA sensor in cGAS-STING-TBK1 pathway | Mediates mitophagy regulation in hormonal cardiac protection |
| STING | Stimulator of interferon genes in innate immune signaling | Part of cGAS-STING-TBK1 axis in cardiac protection |
| TBK1 | TANK-binding kinase 1 in cGAS-STING signaling | Regulates mitophagy in melatonin-induced cardiac protection |
| MYH7 | Beta-myosin heavy chain, a contractile protein | Structural basis for force generation in hypertrophied myocardium |
| MYH6 | Alpha-myosin heavy chain, a contractile protein | Contributes to cardiac contractile machinery |
| ACTC1 | Cardiac actin, a core contractile protein | Component of the myocardial contractile apparatus |
| TNNT2 | Cardiac troponin T, regulator of contraction | Modulates myofilament calcium sensitivity |
| RYR2 | Ryanodine receptor 2, calcium release channel | Affects intracellular calcium and contractile force |
| ATP2A2 | SERCA2 calcium pump | Regulates calcium reuptake and cardiac relaxation/contraction |
How Is hormonal regulation of the force of heart contraction Regulated?
Hormonal regulation of the force of heart contraction is itself regulated by the interplay of hormonal and neuronal factors acting on cardiac adrenoceptors. Slow Ca++ channels of myocardial cells are subject to regulation by hormonal signals, and this regulation determines calcium availability for contraction. Melatonin-related signaling through ALDH2 and the cGAS-STING-TBK1 pathway regulates mitophagy, which can influence cardiac function and protect against anomalies. Vasoactive intestinal peptide provides additional hormonal input that modulates cardiovascular performance. Mechanical factors in hypertrophied myocardium can also feed back on contractile behavior, integrating structural and hormonal regulation.
hormonal regulation of the force of heart contraction and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ADRB1 | Heart failure, altered hormonal inotropy | Knockout or point-mutation cardiomyocyte models |
| ALDH2 | Cardiac anomalies, mitophagy dysregulation | ALDH2 knockout with melatonin treatment |
| EPHB4 | Hypotension, vascular contractility defects | EPHB4 deletion in vascular smooth muscle cells |
| APP/PS1 | Cardiac anomalies in neurodegeneration models | APP/PS1 mutant knock-in mice |
| CACNA1C | Arrhythmia, contractile dysfunction | Point-mutation knock-in for slow Ca++ channel |
Heart failure and hormonal inotropy
Dysregulation of hormonal regulation of the force of heart contraction contributes to impaired cardiac performance in heart failure, where adrenoceptor signaling and calcium handling are altered. Understanding GO:0003058 helps identify hormonal targets for inotropic therapy.
Hypertension and vascular contractility
EPHB4 protein expression in vascular smooth muscle cells regulates their contractility, and EPHB4 deletion leads to hypotension in mice, linking contractility regulation to blood pressure control. Hormonal modulation of cardiac and vascular contractility is therefore relevant to hypertension.
Cardiac anomalies and protective hormonal signaling
APP/PS1 mutation prompts cardiac anomalies that can be protected against by melatonin through ALDH2 and cGAS-STING-TBK1-mediated mitophagy regulation. This links hormonal regulation of cardiac function to neuro-cardiac disease models.
Neuromuscular and myocardial disorders
Muscle satellite cell dysfunction is involved in neuromuscular disorders, and hypertrophied myocardium shows altered mechanical interactions that can affect contractile force. These conditions highlight the importance of hormonal and structural regulation of contraction.
From hormonal regulation of the force of heart contraction-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does a hormone receptor mediate cardiac inotropy? | Knockout of ADRB1 or ADRB2 in cardiomyocytes |
| Does a point mutation in a calcium channel alter contractile force? | Point-mutation knock-in of CACNA1C |
| Does a protective hormone require ALDH2? | ALDH2 knockout with melatonin treatment |
| Does a peptide hormone affect cardiac function? | VIP overexpression or knockout models |
| Does a vascular contractility gene affect blood pressure? | EPHB4 deletion in vascular smooth muscle |
| Does a structural protein mutation alter myocardial mechanics? | Knock-in of MYH7 or TNNT2 mutations |
How to Study the hormonal regulation of the force of heart contraction Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Echocardiography | Cardiac contractility and function in vivo | Assessing hormonal effects on heart force |
| Cardiomyocyte shortening assay | Force of contraction at cellular level | Testing hormonal inotropy in vitro |
| Calcium imaging | Intracellular calcium transients | Evaluating slow Ca++ channel regulation |
| Patch-clamp electrophysiology | Ion channel activity | Measuring slow Ca++ channel currents |
| Western blot | Protein expression and phosphorylation | Analyzing adrenoceptor and ALDH2 signaling |
| Immunoprecipitation | Protein-protein interactions | Dissecting cGAS-STING-TBK1 pathway |
| CRISPR knockout | Loss-of-function phenotype | Testing candidate gene causality |
| RNA-seq | Transcriptomic changes | Identifying hormonal target genes in heart |
Physiological contractility measurements
Measuring the force of heart contraction in isolated cardiomyocytes or whole hearts is essential to study GO:0003058. Techniques include echocardiography, pressure-volume loops, and cardiomyocyte shortening assays, which can be combined with hormonal treatments to assess inotropic responses.
Calcium imaging and electrophysiology
Because slow Ca++ channels are central to hormonal regulation of contraction force, calcium imaging and patch-clamp electrophysiology are key methods to measure calcium influx and channel activity in myocardial cells.
Molecular signaling assays
Western blotting, immunoprecipitation, and kinase activity assays can dissect hormonal signaling pathways involving adrenoceptors, ALDH2, and cGAS-STING-TBK1. These methods reveal how hormonal signals are transduced to contractile effectors.
Genetic and CRISPR-based perturbation
CRISPR knockout, point mutation, knock-in, and overexpression models allow causal testing of candidate genes in hormonal regulation of heart contraction force. Such models can be combined with physiological and molecular assays to link genotype to contractile phenotype.
How CRISPR Can Be Used to Study GO:0003058 hormonal regulation of the force of heart contraction
Knockout
CRISPR knockout of candidate genes such as ADRB1, ALDH2, or EPHB4 enables loss-of-function studies to determine whether these genes are required for hormonal regulation of the force of heart contraction. Knockout models can be subjected to hormonal stimulation and contractility assays to reveal causal roles.
Point Mutation
Point-mutation knock-in models can mimic disease-associated variants in genes such as CACNA1C or TNNT2, allowing precise testing of how specific amino acid changes alter hormonal regulation of contractile force. These models are valuable for dissecting structure-function relationships in cardiac inotropy.
Knock-in
Knock-in of reporter tags or human disease alleles into endogenous loci provides physiological expression control for studying hormonal regulation of heart contraction force. For example, tagging ALDH2 or adrenoceptors can reveal localization and dynamics during hormonal stimulation.
Overexpression
Overexpression of hormones or their receptors, such as VIP or beta-adrenoceptors, can test gain-of-function effects on cardiac contractility. Overexpression models help identify sufficiency of a hormonal pathway in modulating the force of heart contraction.
How EDITGENE Supports hormonal regulation of the force of heart contraction Research
Researchers studying hormonal regulation of the force of heart contraction-related genes often need to determine whether a candidate gene is causally involved in modulating cardiac inotropy, and CRISPR-based models provide the most direct way to establish such causality. By combining knockout, point mutation, knock-in, and overexpression strategies with physiological readouts, it is possible to link specific hormonal signaling components to contractile force.
Contact EDITGENE today to design your custom CRISPR model for hormonal regulation of the force of heart contraction research.
Frequently Asked Questions About hormonal regulation of the force of heart contraction
What is GO:0003058?
GO:0003058 is the biological process of hormonal regulation of the force of heart contraction, also known as hormonal cardiac inotropy, in which hormones modulate the strength of heart muscle contraction.
What genes are involved in hormonal regulation of the force of heart contraction?
Genes such as ADRB1, ADRB2, ALDH2, VIP, CACNA1C, and EPHB4 have been implicated in hormonal regulation of cardiac contractility.
How do hormones regulate the force of heart contraction?
Hormones bind to cardiac receptors such as adrenoceptors and modulate slow Ca++ channels and other effectors, thereby altering the force of contraction.
What is hormonal cardiac inotropy?
Hormonal cardiac inotropy is a synonym for GO:0003058, describing the modulation of heart muscle contraction force by hormones.
Which calcium channels are involved in hormonal regulation of heart contraction?
The slow Ca++ channels of myocardial cells are key targets of hormonal regulation of contraction force.
What is the role of ALDH2 in hormonal cardiac protection?
ALDH2 contributes to melatonin-induced protection against cardiac anomalies through cGAS-STING-TBK1-mediated regulation of mitophagy.
How does vasoactive intestinal peptide affect the heart?
Vasoactive intestinal peptide has cardiovascular effects, including modulation of cardiac function and vascular tone.
Can CRISPR be used to study hormonal regulation of heart contraction force?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models enable causal testing of genes involved in hormonal cardiac inotropy.
What diseases are linked to hormonal regulation of heart contraction?
Heart failure, hypertension, cardiac anomalies, and neuromuscular disorders have been linked to dysregulated hormonal control of cardiac contractility.
What methods are used to study GO:0003058?
Methods include echocardiography, cardiomyocyte shortening assays, calcium imaging, patch-clamp electrophysiology, Western blotting, and CRISPR-based perturbation.
Conclusion
GO:0003058, hormonal regulation of the force of heart contraction, is a fundamental biological process that integrates endocrine signals with cardiac contractile machinery. Key mediators include adrenoceptors, slow Ca++ channels, vasoactive intestinal peptide, and melatonin-ALDH2 protective pathways. Understanding this process is essential for developing therapeutic strategies for heart failure, hypertension, and related cardiovascular disorders. CRISPR-based models offer powerful tools to dissect the causal roles of individual genes in hormonal cardiac inotropy.
References
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- 3. Wang Y et al.. 2015. EPHB4 Protein Expression in Vascular Smooth Muscle Cells Regulates Their Contractility, and EPHB4 Deletion Leads to Hypotension in Mice.. J Biol Chem 290(22):14235-44 PMID: 25903126
- 4. Wang S et al.. 2020. ALDH2 contributes to melatonin-induced protection against APP/PS1 mutation-prompted cardiac anomalies through cGAS-STING-TBK1-mediated regulation of mitophagy.. Signal Transduct Target Ther 5(1):119 PMID: 32703954
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- 8. Sperelakis N et al.. 1996. Regulation of the slow Ca++ channels of myocardial cells.. Mol Cell Biochem 163-164:85-98 PMID: 8974043
