devd peptide selective caspase-3 - compound-semaglutide-dose-chart DEVD The Crucial Role of the DEVD Peptide in Apoptosis Research and Drug Development

dermelect-peptide-infused-concealer The DEVD peptide (Asp-Glu-Val-Asp) is a short amino acid sequence that plays a pivotal role in the biochemical cascade of apoptosis, specifically by acting as a substrate for caspase-3 and caspase-7Ac-DEVD-pNA is asynthetic tetrapeptide substratethat functions as a chromogenic probe for caspase-3 and related cysteine proteases.. Its significance extends into various research applications, including its use as an imaging probe, a component in drug conjugates, and a target for developing inhibitors.Ac-DEVD-pNA peptide Understanding the properties and applications of the DEVD peptide is crucial for researchers in molecular biology, pharmacology, and therapeutics.

At its core, the DEVD peptide sequence is recognized and cleaved by specific cysteine proteases, namely caspases, which are key executioners of programmed cell death.DEVD peptide used as an enzyme-sensitive linker in drug ... This cleavage event is a fundamental step in the apoptotic pathway. When caspase-3 or caspase-7 recognizes the DEVD sequence, it cleaves the peptide bond between the valine (Val) and the aspartic acid (Asp) residues. This precise enzymatic activity makes the DEVD peptide an invaluable tool for studying and monitoring apoptosis.

Applications as a Substrate and Imaging Probe

The ability of caspases to cleave the DEVD peptide has led to the development of various detection and measurement toolsAc-DEVD-pNA is apeptidesubstrate for caspase-3/-7. Caspase-3/-7 can catalyze its hydrolysis, releasing the para-nitroaniline (pNA) chromophore.. Synthetic peptides incorporating the DEVD motif have been modified with reporter molecules to facilitate the visualization and quantification of caspase activity.

* Fluorogenic Substrates: Several derivatives, such as Ac-DEVD-AMC and Z-DEVD-AMC, are fluorogenic substrates. These contain a fluorophore (like 7-amino-4-methylcoumarin, AMC) attached to the C-terminus of the DEVD peptide.Download scientific diagram |DEVD peptide used as an enzyme-sensitive linker in drug conjugates. A Chemical structure of EMC-DEVD-S-DOX; ... Upon cleavage by caspases, the fluorophore is released, producing a measurable fluorescence signal. Similarly, Ac-DEVD-AFC and Z-DEVD-AFC utilize a different fluorophore, AFC, for this purpose.caspase-3 Substrates The working concentration for Ac-DEVD-AFC is typically between 25-50 µM.Ac-DEVD-CHO These substrates are vital for assays that measure caspase activity in cell extracts or in real-time cellular imaging.

* Colorimetric Substrates: Ac-DEVD-pNA is another widely used DEVD peptide derivative. It incorporates a para-nitroaniline (pNA) chromophore. When cleaved by caspases, pNA is released, generating a yellow-colored product that can be quantified spectrophotometrically.作者：R Shiri·2014·被引用次数：34—We investigated the effects of caspase-3 inhibitor on the survival and function of platelets after different periods of storage. The synthesis of Ac-DEVD-pNA often begins with coupling para-nitroaniline to Fmoc-Asp(OtBu), proceeding from the C- to N-terminus.

* Imaging Probes: The DEVD peptide has been extensively employed as a caspase 3-cleavable imaging probe for both *in vitro* and *in vivo* imaging of apoptosis. For instance, 18F-CP18 is a novel DEVD-containing peptide substrate designed for PET imaging.Ac-Asp-Glu-Val-Asp-AFC (Ac-DEVD-AFC) Studies have shown that such labeled Ac-DEVD peptides can exhibit preferential tumor uptake in apoptotic tumors, correlating with ex vivo caspase-3 activityAc-DEVD-CHO.

DEVD Peptide in Drug Development and Delivery

Beyond its role in detection, the DEVD peptide is also being integrated into sophisticated drug delivery systems and therapeutic strategies.

* Enzyme-Sensitive Linkers: The DEVD peptide can be utilized as an enzyme-sensitive linker in drug conjugates. This approach allows for the targeted release of therapeutic agents specifically within apoptotic cellsZ-DEVD-FMK Caspase-3 Inhibitoris a cell-permeable, irreversible inhibitor of caspase-3/CPP32. It inhibits tumor cell apoptosis.. For example, a DEVD peptide linker can connect a drug molecule to a carrier, ensuring that the drug is liberated only when caspase activity, indicative of apoptosis, is present.Ac-DEVD-pNA is a syntheticpeptidesubstrate specifically engineered for caspase-3, featuring a distinctiveDEVDsequence that ensures selective recognition and ... An illustration of this is the use of DEVD peptide as a stable linker involved in doxorubicin prodrugs.Preparation of the Caspase-3/-7 substrate Ac-DEVD-pNA via ...

* Caspase Inhibitors: Conversely, modified DEVD peptide sequences can act as effective irreversible caspase inhibitors.Download scientific diagram |DEVD peptide used as an enzyme-sensitive linker in drug conjugates. A Chemical structure of EMC-DEVD-S-DOX; ... These inhibitors are crucial for understanding the role of caspases in various physiological and pathological processes and for developing therapies to modulate apoptosis.

* DEVD-based Hydrogelators: Interesting applications include the development of DEVD-based hydrogelators. One such molecule, DEDV-based hydrogelator 2, induces cell death via the apoptotic pathway, while a related DEVD-based hydrogelator 1 minimizes apoptosis. This highlights the nuanced control over cellular fate that can be achieved with DEVD-containing structuresDescription. AMC (7-amino-4-methylcoumarin) derived caspase substrates are widely used for the fluorimetric detection of various caspase activities..

* Peptide Aldehydes: Synthetic peptide aldehydes like Ac-DEVD-CHO are potent competitive inhibitors of caspase-3/7. This synthetic tetrapeptide contains the amino acid sequence recognized in the PARP cleavage site, making it a specific target for caspase inhibition.D-peptide - Wikipedia

* Peptide Fluoromethyl Ketones: Another class of inhibitors includes fluoromethyl ketone (FMK)-derivatized peptides, such as Z-DEVD-FMK. These cell-permeable fluoromethyl ketone-derivatized peptides act as effective irreversible Caspase inhibitors and often have no cytotoxic effects themselves.Ac-DEVD-CHO is asynthetic peptide aldehydewith the PARP cleavage site DEVD, which is recognized by caspases (Nicholson et al.). Z-DEVD-FMK Caspase-3 Inhibitor can inhibit tumor cell apoptosis and has been studied for its effects on platelet survival and function in platelet concentrates during storage.

* Solid Phase Synthesis: Robust methods have been developed for the solid phase synthesis of selective caspase-3 peptide inhibitors, allowing for the creation of diverse inhibitor libraries.

Synthesis and Chemical Properties

The synthesis of DEVD peptide derivatives typically employs established peptide synthesis methodologies作者：AM Tang·2013·被引用次数：21—DEDV-based hydrogelator 2 induces cell death via apoptotic pathwaywhile the DEVD-based hydrogelator 1 minimizes cellular apoptosis induction.. For instance, Synthetic DEVD peptide amides or methyl esters can be prepared using Fmoc/tBu chemistry on specific resins. The synthesis of the Ac-DEVD-pNA peptide, for example, is synthesized from C- to N-terminus, starting with the coupling of para-nitroaniline. The presence of free carboxyl groups on the aspartic acid side chains of the DEVD motif is a key chemical characteristic.D-peptide - Wikipedia Under physiological pH, these groups are generally ionized, which can influence interactions and stability.

Research Context and Future Directions

The ongoing exploration of the DEVD peptide is driven by its fundamental role in apoptosis作者：SW Chung·2015·被引用次数：29—TheDEVDmotif has three −COOH groups in its amino acid side chains. As the −COOH is generally ionized in physiological pH, the side chain − .... Research frequently focuses on optimizing linker stability for drug conjugates, developing more sensitive and specific imaging probes, and creating highly potent and selective caspase inhibitors. The applications span from fundamental biological research to the development of novel therapeutics for cancer, neurodegenerative diseases, and inflammatory conditions.

In conclusion, the DEVD peptide is a small yet powerful molecule with profound implications in biological research and therapeutic development. Its predictable interaction with key apoptotic enzymes like caspase-3 and caspase-7 has paved the way for sophisticated diagnostic tools and innovative drug delivery systems, underscoring its continued importance in scientific advancement.