Synthesis and Characterization of Thallium-Texaphyrin Nanoparticles and Their Assessment as Potential Delivery Systems for Auger Electron-Emitting Tl to Cancer Cells.

Thallium-201 is an Auger electron-emitting radionuclide with significant potential for targeted molecular radiotherapy of cancer. It stands out among other Auger electron emitters by releasing approximately 37 Auger and Coster-Kronig electrons per decay, which is one of the highest numbers in its category. It has also a convenient half-life of 73 h, a stable daughter product, established production methods, and demonstrated high radiotoxicity.

Preclinical Comparison of [In]In- and [Ac]Ac-DOTA-Trastuzumab IgG, F(ab') and Fab for Theranostic SPECT/CT Imaging and α-Particle Radioimmunotherapy of HER2-Positive Human Breast Cancer.

Radioimmunotherapy (RIT) with α-particle-emitting, Ac complexed to trastuzumab may offer an alternative treatment for patients who progress on HER2-targeted therapies. Moreover, RIT with [Ac]Ac-DOTA-trastuzumab could be combined with SPECT/CT imaging with [In]In-DOTA-trastuzumab in a theranostic approach. In this study, we compared DOTA-conjugated trastuzumab IgG, F(ab') or Fab complexed to In or Ac for SPECT/CT imaging and α-particle RIT of subcutaneous (s.

Synovial Fluid Immune Cell Composition Following Intraarticular Fracture May Contribute to Posttraumatic Osteoarthritis.

Intra-articular ankle fracture (IAF) often leads to post-traumatic osteoarthritis (PTOA), resulting in significant long-term morbidity. While previous research has focused on the inflammatory cytokines and matrix metalloproteinases within the synovial fluid fracture hematoma (SFFH), the immune cell populations within SFFH that contribute to PTOA development remain underexplored. This study aimed to characterize the immune cell populations in SFFH to better understand their role in the inflammatory response and potential for inducing lasting cartilage damage.

SPECT/CT imaging of EGFR-positive head and neck squamous cell carcinoma patient-derived xenografts with Pb-PSC-panitumumab in NRG mice.

Background: The objective of this research was the development and evaluation of Pb-labelled panitumumab (Pb-PSC-panitumumab) as an immuno-SPECT radioligand for the detection of EGFR + head and neck squamous cell carcinoma (HNSCC) in a patient-derived xenograft (PDX) mouse model. The 51.9 h physical half-life and favourable γ-emission (279 keV; 81%) of Pb offer an excellent opportunity for developing immuno-SPECT radioligands.

Convection-enhanced delivery of [Lu]Lu-labeled gold nanoparticles combined with anti-PD1 checkpoint immunotherapy improves the survival of immunocompetent C57BL/6J mice with orthotopic GL261 murine glioma tumors.

Introduction: Our objective was to study convection enhanced delivery (CED) of Lu-labeled metal chelating polymer (MCP) conjugated to gold nanoparticles ([Lu]Lu-MCP-AuNP) alone or combined with anti-PD1 immune checkpoint inhibition (ICI) for improving the survival of immunocompetent C57BL/6J mice with orthotopic GL261 murine glioma tumors.

Methods: C57BL/6J mice with GL261 tumors were treated with [Lu]Lu-MCP-AuNP (0.8 or 2.