D-Arg8-Cetrorelix substitutes a D-arginine at position 8, modifying backbone stereochemistry and proteolytic susceptibility. The guanidinium side chain remains cationic, but local geometry is significantly shifted. Researchers compare receptor affinity and structural stability relative to the L-form. Applications include analog-based SAR, peptide stabilization strategies, and conformational-enforcement studies.
CAT No: Z10-101-209
Synonyms/Alias:(S)-1-(((R)-2-((S)-2-((S)-2-((R)-2-((R)-2-((R)-2-acetamido-3-(naphthalen-2-yl)propanamido)-3-(4-chlorophenyl)propanamido)-3-(pyridin-3-yl)propanamido)-3-hydroxypropanamido)-3-(4-hydroxyphenyl)propanamido)-5-ureidopentanoyl)-L-leucyl-D-arginyl)-N-((R)-1-amino-1-oxopropan-2-yl)pyrrolidine-2-carboxamide; (S)-1-(((R)-2-((S)-2-((S)-2-((R)-2-((R)-2-((R)-2-acetamido-3-(naphthalen-2-yl)propanamido)-3-(4-chlorophenyl)propanamido)-3-(pyridin-3-yl)propanamido)-3-hydroxypropanamido)-3-(4-hydroxyphenyl)propanamido)-5-ureidopentanoyl)-L-leucyl-D-arginyl)-N-((R)-1-amino-1-oxopropan-2-yl)pyrrolidine-2-carboxamide
D-Arg8-Cetrorelix is a synthetic peptide analog derived from cetrorelix, characterized by the substitution of eight D-arginine residues. This modification enhances the peptide's resistance to enzymatic degradation, thereby improving its stability and biological activity in experimental settings. As a potent antagonist of gonadotropin-releasing hormone (GnRH), D-Arg8-Cetrorelix is widely recognized for its ability to competitively inhibit the action of endogenous GnRH at its receptor sites. Its unique structure and functional properties make it a valuable tool in diverse research domains, particularly those focused on reproductive biology, endocrinology, and peptide-based drug development. Researchers appreciate its high affinity for GnRH receptors and its capacity to modulate hormonal pathways with precision, enabling detailed investigation of physiological and biochemical processes regulated by the hypothalamic-pituitary-gonadal axis.
Reproductive endocrinology research: D-Arg8-Cetrorelix is extensively utilized in studies investigating the regulation of reproductive hormones and the mechanisms underlying gonadotropin secretion. By selectively blocking GnRH receptors, it allows researchers to suppress luteinizing hormone (LH) and follicle-stimulating hormone (FSH) release, thereby creating controlled experimental models for examining the hypothalamic-pituitary-gonadal axis. This capability is instrumental in elucidating the feedback mechanisms and hormonal interactions that govern fertility, puberty, and reproductive cycles in various animal models. Its use facilitates the dissection of neuroendocrine pathways and supports the development of new hypotheses regarding reproductive health and dysfunction.
Cancer biology studies: The peptide analog finds significant application in cancer research, particularly in exploring the role of GnRH and its receptors in hormone-dependent tumors. By inhibiting GnRH signaling, D-Arg8-Cetrorelix enables scientists to assess the impact of hormonal modulation on tumor cell proliferation, metastasis, and apoptosis. This approach is valuable for delineating the molecular pathways through which GnRH antagonists may influence tumor growth and progression, especially in cancers of the reproductive system such as prostate and ovarian malignancies. The insights gained from these studies contribute to a deeper understanding of tumor endocrinology and support the identification of novel therapeutic targets.
Assisted reproductive technology (ART) research: In the context of ART, D-Arg8-Cetrorelix serves as an essential experimental reagent for optimizing protocols related to ovulation induction and controlled ovarian stimulation. Its ability to suppress premature LH surges allows researchers to refine the timing and outcomes of oocyte retrieval in animal models, thereby advancing the study of gamete maturation, fertilization, and embryo development. This application is crucial for improving the efficiency and safety of ART procedures, as well as for investigating the physiological effects of hormonal manipulation on reproductive tissues.
Peptide drug development: The enhanced stability and receptor selectivity of D-Arg8-Cetrorelix make it a valuable scaffold for the design and testing of novel peptide-based therapeutics. Researchers employ this analog to evaluate structure-activity relationships, optimize pharmacokinetic properties, and develop next-generation GnRH antagonists with improved efficacy and bioavailability. Its use in preclinical models accelerates the translation of basic research findings into potential therapeutic candidates, supporting innovation in the field of peptide drug discovery.
Neuroendocrine signaling investigations: D-Arg8-Cetrorelix is also applied in studies focused on the broader aspects of neuroendocrine regulation beyond reproduction. By modulating GnRH activity, it provides a means to explore the interconnectedness of hormonal signaling networks that influence metabolism, stress response, and developmental processes. Researchers leverage its specificity to dissect the role of GnRH in central and peripheral tissues, thereby advancing our understanding of endocrine system dynamics and their implications for health and disease.
Collectively, D-Arg8-Cetrorelix remains an indispensable tool in scientific research, offering versatility and precision in the study of hormonal regulation, tumor biology, reproductive technologies, peptide therapeutics, and neuroendocrine pathways. Its robust performance across multiple experimental paradigms underscores its value for advancing knowledge and driving innovation in the life sciences.
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