dota peptide DOTA-cyclo(RGDfK) acetate - DOTApKa DOTA peptide Understanding Dota Peptide: A Powerful Tool in Medical Imaging and Therapy

DOTAChemical Name The exploration of advanced medical technologies often leads to specialized compounds with remarkable applications. Among these, dota peptide stands out as a critical component in medical applications, particularly in diagnostic imaging and targeted cancer therapiesDOTA Peptideis used as a complexing agent in medical applicationsas contrast agents and cancer treatments for example in positron emission tomography.. This article delves into the intricate world of dota peptide, elucidating its chemical nature, synthesis, and its pivotal role in modern medicine, especially in areas like positron emission tomography (PET) and peptide receptor radionuclide therapy (PRRT)作者：JK Sosabowski·2006·被引用次数：101—This protocol describes the method required toconjugate a peptide to the DOTA chelator, and to label the conjugate with a radionuclide (such as ....

At its core, DOTA is a macrocyclic chelator, a molecule with a ring structure capable of strongly binding metal ions. Its full chemical name is 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid. This DOTA chemical possesses four carboxylate and four nitrogen groups within its 12-atom cyclic structure, enabling it to form highly stable complexes with a variety of metal ions. This unique characteristic makes DOTA an invaluable tool in radiochemistry, where it is employed to stably attach radioactive isotopes to peptides. The development of a DOTA structure that can effectively encapsulate radionuclides has been a significant advancementChelate Peptides (DOTA related peptides).

The conjugation of DOTA to peptides forms DOTA-peptide conjugates. These conjugates are engineered to target specific cells or tissues within the body. For instance, DOTATATE is a DOTA-conjugated peptide that targets somatostatin receptors, which are often overexpressed on neuroendocrine tumors. This targeting capability is crucial for precise delivery of diagnostic or therapeutic agents. The synthesis of such DOTA-peptide conjugates involves intricate chemical processes, often using solid-phase techniques for efficient DOTA synthesis. Researchers have explored various methods for conjugate a peptide to the DOTA chelator, including traditional chemical linkages and more modern approaches like copper-free click chemistry.作者：ME Martin·2010·被引用次数：50—Attachment ofDOTAto a novel monofluoro-cyclooctyne facilitates bioconjugation to an azide-modifiedpeptidevia Cu-free click chemistry. The goal is to achieve stable and efficient binding, ensuring the integrity of the final labeled DTPA- and DOTA-conjugated peptides.Somatostatin Receptor Imaging with [ 18 F]FET-βAG-TOCA ...

The utility of dota peptide truly shines when these conjugates are radiolabeled with specific radionuclides. For diagnostic imaging, isotopes like Gallium Ga 68 are commonly used to create 68 Ga-DOTA-peptide PET imaging agents. These agents allow physicians to visualize tumors with high resolution by detecting the emitted positrons. In the realm of therapy, isotopes such as Lutetium-177 are employed.Synthesis of the DOTA-TATE peptide. 177Lu-DOTATATE for the treatment of gastroenteropancreatic neuroendocrine tumors is a prime example of peptide receptor radionuclide therapy (PRRT), where the radiolabeled peptide delivers a therapeutic radiation dose directly to cancer cells expressing the targeted receptors.labeled, DOTA-conjugated tetrapeptides having high affinity ... This targeted approach offers a more precise and potentially less toxic alternative to conventional chemotherapy.作者：WAP Breeman·2005·被引用次数：396—DOTA-peptides for PET imaging can be labelled with 68 Gaup to specific activities of 1 GBq per nmol within 20 min, enabling the clinical application of ... DOTA-TATE therapy is a well-established form of PRRT that leverages this principle.DOTA/NOTA functionalization

The chemistry behind chelating DOTA to peptides has been a subject of extensive research. Understanding the DOTA ligand properties, including its DOTA pKa, is essential for optimizing the labeling process作者：ME Martin·2010·被引用次数：50—Attachment ofDOTAto a novel monofluoro-cyclooctyne facilitates bioconjugation to an azide-modifiedpeptidevia Cu-free click chemistry.. Numerous studies have focused on the practical aspects of labeling, ensuring high specific activity and radiochemical purity of the resulting radiopharmaceutical. For example, efficient methods for radiolabeling DOTA-peptides with 68 Ga have been developed, enabling their widespread clinical application. The development of DOTA-TATE acetate (GMP) and DOTATATE acetate is a DOTA-conjugated peptide further highlights the availability of these compounds for pharmaceutical useDefinition of lutetium Lu 177-DOTA-di-HSG peptide IMP-288.

Beyond oncology, DOTA chelators are also explored for other medical applications作者：WAP Breeman·被引用次数：2—Discuss the stability, specific activity, incorporation yield, and radiochemical purity of thefinal labeled DTPA- and DOTA-conjugated peptides.. For instance, promising targeted small molecular macrocyclic contrast agents for MR molecular imaging of prostate cancer are being developed using Gd-DOTA conjugates作者：Y Li·2017·被引用次数：27—The peptide Gd-DOTA conjugates specific to EDB-FN arepromising targeted small molecular macrocyclic contrast agentsfor MR molecular imaging of prostate .... The ability of DOTA to form stable complexes with paramagnetic ions like Gadolinium makes it suitable for magnetic resonance imaging (MRI) contrast agentsChelating DOTA Peptides.

In summary, dota peptide represents a sophisticated class of molecules with profound implications for medical diagnostics and therapeuticsDOTAis used as a complexing agent, especially for lanthanide ions. Its complexes have medical applications as contrast agents and cancer treatments.. The strong chelating properties of DOTA, when combined with the targeting specificity of peptides, create powerful tools for disease detection and treatment. Whether used for PET imaging or as part of peptide receptor radionuclide therapy, the DOTA-peptide complex is at the forefront of personalized medicine, offering innovative solutions for complex health challengesA DOTA–peptide conjugate by copper-free click chemistry. The ongoing research into DOTA synthesis and its conjugation with various peptides, such as DOTA-cyclo(RGDfK) acetate, continues to expand the therapeutic and diagnostic potential of this remarkable DOTA chemicalSynthesis, Radiolabeling, and Biodistribution Study of a ....