rgd-peptide-integrin-inhibitor The dominant search intent for "rgdfk peptide" is to understand its biological function, applications, and properties, particularly its role as an integrin inhibitor and its potential in cancer targeting and biomedical research.
Tier 1:
* Core Entity: RGDfK peptide
* High-Relevance Phrases: cyclic RGDfK, $\alpha$v$\beta$3 integrin inhibitor, tumor targeting, cell adhesion
Tier 2:
* Related Entities/Variations: RGD peptide, peptide, cyclic peptides, RGDfK, c(RGDfK), cyclo(-RGDfK)
* Key Attributes/Applications: protease resistant, stable in aqueous solutions, high affinity for cellular integrins, targeting tumor microvasculature, molecular imaging, drug delivery, biomaterials, cell scaffolds, nanocarriers
Tier 3:
* Less relevant/repetitive: CAS numbers, specific synthesis methods (unless they highlight a key property), product catalog numbers, overly technical chemical nomenclature without context作者：HP Sondermeijer·2018·被引用次数：35—CyclicRGDfK peptideis protease resistant, highly stable in aqueous solutions, and has high affinity for cellular integrins. Cyclic RGDfK-modified alginate ....
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The RGDfK peptide, specifically its cyclic form cyclo(-RGDfK), has emerged as a significant molecule in biomedical research due to its potent ability to inhibit integrins, particularly $\alpha$v$\beta$3. This specific binding characteristic makes it a valuable tool for targeted drug delivery, molecular imaging, and the development of advanced biomaterials. The RGDfK peptide's high affinity for cellular integrins, coupled with its stability, underpins its growing importance in understanding and treating diseases like cancer.E(c(RGDfK))2 | Peptides
The RGDfK peptide is a synthetic peptide sequence that mimics a naturally occurring motif found in various extracellular matrix proteins.CAS 161552-03-0 c(RGDfK) - BOC ... The "RGD" sequence (Arginine-Glycine-Aspartic acid) is a well-known ligand for several integrin receptors.It was found to bind specifically and with high affinity to αvβ3 receptors on neovascular blood vessel sections of different major human cancers. The inclusion of "fK" (D-Phenylalanine and Lysine) in the RGDfK sequence, particularly when cyclized, enhances its stability and affinity.
Integrins are a large family of cell surface receptors that play crucial roles in cell-cell and cell-extracellular matrix adhesion, cell signaling, and migrationRGD peptide in cancer targeting: Benefits, challenges, solutions, and .... The $\alpha$v$\beta$3 integrin, a major target of the RGDfK peptide, is often overexpressed on the surface of activated endothelial cells, particularly those involved in angiogenesis (the formation of new blood vessels), and on various types of tumor cellsCyclo(RGDfK) Functionalized Spider Silk Cell Scaffolds .... This selective overexpression makes $\alpha$v$\beta$3 an attractive target for therapeutic interventions.Investigation of the Best Conditions to Obtain c(RGDfK ...
The ability of RGDfK peptide to selectively bind to $\alpha$v$\beta$3 integrins has opened doors for numerous applications:
* Cancer Targeting and Drug Delivery: By conjugating the RGDfK peptide to drugs, imaging agents, or nanocarriers, researchers can direct these payloads specifically to tumor sites or the tumor's neovasculature. This targeted approach aims to increase the efficacy of treatments while minimizing systemic side effects. The peptide's high affinity allows it to bind to tumor microvasculature, effectively delivering therapeutic agents directly to the tumor environment.作者：L Liu·2014·被引用次数：35—In this study, biodegradable, tumor-targeted, self-assembledpeptidenanoparticles consisting of cyclo(Arg–Gly–Asp–d–Phe–Lys)-8–amino–3,6–dioxaoctanoic acid–
* Molecular Imaging: Radiolabeled RGDfK peptides are used in molecular imaging techniques to visualize and detect tumors or neovascularization non-invasively. For instance, peptides labeled with isotopes like $^{125}$I or $^{99m}$Tc can bind to $\alpha$v$\beta$3 receptors in vivo, allowing for the detection of tumor uptake and the assessment of treatment response.
* Biomaterials and Cell Scaffolds: In tissue engineering and regenerative medicine, RGDfK peptides can be incorporated into biomaterials, such as alginate scaffolds or polymeric nanocarriers. This functionalization enhances cell adhesion, proliferation, and integration of the biomaterial with host tissues, promoting better outcomes for cell culture and regenerative applications.作者：H Kulhari·2016·被引用次数：55—RGDpeptidesare well-known to bind preferentially to the αvβ3 integrin. In this context, targeting tumor cells or tumor vasculature by RGD-based strategies is ... The peptide's ability to improve cell adhesion on synthetic surfaces is particularly valuable.
The cyclic nature of the RGDfK peptide offers several advantages over its linear counterparts.The original synthesis of cRGDfK employed the Fmoc solid-phase chemistry to build a linear, protectedRGDfK peptide, followed by cleavage from the solid resin, ... Cyclization confers greater protease resistance, meaning the peptide is less likely to be degraded by enzymes in the body, leading to a longer half-life and improved therapeutic potential.Cyclo(-RGDfK) | Cell Adhesion Inhibitors: Tocris Bioscience Furthermore, cyclic RGDfK peptides generally exhibit higher binding affinity and specificity for their target integrins. They remain stable in aqueous solutions, facilitating their use in various biological and pharmaceutical formulations.
Ongoing research continues to explore the full potential of RGDfK peptides作者：L Liu·2014·被引用次数：35—In this study, biodegradable, tumor-targeted, self-assembledpeptidenanoparticles consisting of cyclo(Arg–Gly–Asp–d–Phe–Lys)-8–amino–3,6–dioxaoctanoic acid–. Studies involve synthesizing multivalent forms of the peptide, conjugating it with different imaging agents (like DOTA for radiometal labeling) or therapeutic molecules, and developing novel delivery systems such as self-assembled nanoparticles....peptides. After washing (3×5 min with binding buffer), bound biotinylated ligand is detected with alkaline-phosphatase conjugated goat antibiotin antibodies ... Investigations into structure-activity relationships are refining the peptide sequence for even greater potency and selectivity against specific integrin subtypes. While the RGDfK peptide shows immense promise, challenges remain in optimizing delivery, ensuring long-term stability in vivo, and navigating regulatory pathways for clinical translation.
In conclusion, the RGDfK peptide, especially in its cyclic form, represents a powerful and versatile molecular tool. Its specific interaction with $\alpha$v$\beta$3 integrins positions it as a key player in the development of targeted cancer therapies, advanced diagnostic imaging, and innovative regenerative medicine approaches, highlighting its significant impact on current and future biomedical research.作者：H Kulhari·2016·被引用次数：55—RGDpeptidesare well-known to bind preferentially to the αvβ3 integrin. In this context, targeting tumor cells or tumor vasculature by RGD-based strategies is ...
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