Porphyrins and Cu have emerged as a novel synergic option for applications in PET molecular imaging. Both the characteristics and photophysical properties of macrocyclic porphyrins and the relatively long half-life of the copper isotope, in addition to the increased tumor-specific uptake of porphyrins compared to normal cells, make this complex an attractive option not only for diagnosis but also for therapeutic applications. Herein, we present an overview of the latest results on the development of PET agents based on porphyrins and Cu, including methods used to improve the selectivity of these macrocycles when conjugated with biological units such as monoclonal antibodies, peptides or proteins.
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http://dx.doi.org/10.1039/c8md00263k | DOI Listing |
Mikrobiyol Bul
January 2025
Uşak Üniversitesi Tıp Fakültesi, Biyofizik Anabilim Dalı, Uşak.
Layşmanyaz, yaklaşık 90'dan fazla ülke ve bölgeden bildirilen, ciddi ve endemik bir bulaşıcı hastalıktır. Kutanöz layşmanyaz (KL) ise vücudun açıkta kalan bölgelerinde oluşan, başlıca semptomları arasında vektör Phlebotomus ısırığından altı ay sonra kronikleşebilen veya kendiliğinden iyileşebilen ciltte tek, birden fazla ülserli veya nodüler lezyonlar bulunan, ölümcül olmayan ancak kalıcı izler bırakabilen bir hastalıktır. Klasik tedavi yöntemleri, uygulamada zorluk, direnç gelişimi ve yan etki gibi bir dizi soruna neden olmaktadır.
View Article and Find Full Text PDFJ Colloid Interface Sci
January 2025
The Department of Medical Imaging, Guangzhou Key Laboratory of Molecular Functional Imaging and Artificial Intelligence for Major Brain Diseases, The Affiliated Guangdong Second Provincial General Hospital of Jinan University, Jinan University, Guangzhou 518037 China. Electronic address:
Microwave dynamic therapy (MWDT) destroy tumor cells using reactive oxygen species (ROS), but its effectiveness is limited by low ROS production and intracellular oxygen (O) availability. This study presents a novel strategy using manganese (II) ion (Mn) doped iron (Fe)-based metal-organic framework (Fe MOF) nanoparticles (NPs) to enhance both O generation and ROS production for improved MWDT. Incorporating Mn into Fe MOF narrows the bandgap from 0.
View Article and Find Full Text PDFBiomater Sci
January 2025
Zhejiang Key Laboratory of Smart BioMaterials, and College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China.
Accurate imaging of tumor hypoxia is critical for early cancer diagnosis and clinical outcomes, highlighting the great need for its detection specificity and sensitivity. In this report, we propose a probe (HTRNP) that simultaneously has hypoxia-targeting and hypoxia-responsive capabilities to enhance the tumor hypoxia imaging efficiency. HTRNP was successfully prepared through the encapsulation of Pt(II)-tetrakis(pentafluorophenyl)porphyrin (PtPFPP), which exhibits hypoxia-dependent phosphorescence, within the amphiphilic block copolymer OPDMA-PF, which has hypoxia-targeting tertiary amine -oxide moieties and hydrophobic perfluorobenzene ring structures, which highly improved the loading content and water solubility of PtPFPP.
View Article and Find Full Text PDFProtein Sci
February 2025
Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK.
We have recently demonstrated a novel anaerobic NADH-dependent haem breakdown reaction, which is carried out by a range of haemoproteins. The Yersinia enterocolitica protein, HemS, is the focus of further research presented in the current paper. Using conventional experimental methods, bioinformatics, and energy landscape theory (ELT), we provide new insight into the mechanism of the novel breakdown process.
View Article and Find Full Text PDFNanoscale
January 2025
Institute of Hepatobiliary and Pancreatic Surgery, Department of Hepatobiliary and Pancreatic Surgery, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, 200120, P. R. China.
The mode of energy transfer between photosensitizers and oxygen determines the yield of singlet oxygen (O), crucial for photodynamic therapy (PDT). However, the aggregation of photosensitizers promotes electron transfer while inhibiting pure energy transfer, resulting in the generation of the hypotoxic superoxide anion (O) and consumption of substantial oxygen. Herein, we achieve the reduction of the aggregation of photosensitizers to inhibit electron transfer through classical chemical crosslinking, thereby boosting the production of O.
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