Towards 99mTc- and Re-based multifunctional silica platforms for theranostic applications

Taking advantage of the radiation properties of 99mTc and 186/188Re and the photophysical characteristics of the {M(CO)3}+ moiety (M = Re), we developed a multifunctional silica platform with the theranostic pair 99mTc/Re with high potential for (nano)medical applications. Starting with a general screening to evaluate the most suitable mesoporous silica construct and the development of appropriate chelate systems, multifunctional mesoporous silica microparticles (SBA-15) were synthesized. These particles act as a model towards the synthesis of the corresponding nanoconstructs. The particles can be modified at the external surface with a targeting function and labeled with the {M(CO)3}+ moiety (M = 99mTc, Re) at the pore surface. Thus, a silica platform is realized, whose bioprofile is not altered by the loaded modalities. The described synthetic procedures can be applied to establish a target-specific theranostic nanoplatform, which enables the combination of fluorescence and radio imaging, with the possibility of radio- and chemotherapy

Towards 99mTc- and Re-Based Multifunctional Silica Platforms for Theranostic Applications

Taking advantage of the radiation properties of 99mTc and 186/188Re and the photophysical characteristics of the {M(CO)3}+ moiety (M = Re), we developed a multifunctional silica platform with the theranostic pair 99mTc/Re with high potential for (nano)medical applications. Starting with a general screening to evaluate the most suitable mesoporous silica construct and the development of appropriate chelate systems, multifunctional mesoporous silica microparticles (SBA-15) were synthesized. These particles act as a model towards the synthesis of the corresponding nanoconstructs. The particles can be modified at the external surface with a targeting function and labeled with the {M(CO)3}+ moiety (M = 99mTc, Re) at the pore surface. Thus, a silica platform is realized, whose bioprofile is not altered by the loaded modalities. The described synthetic procedures can be applied to establish a target-specific theranostic nanoplatform, which enables the combination of fluorescence and radio imaging, with the possibility of radio- and chemotherapy

A novel 99m^{99m}Tc labelling strategy for the development of silica based particles for medical applications

The reaction of high-valent fac-{$^{99m}$TcO$_3$}+ complexes with alkenes ((3 + 2)-cycloaddition) has been used to develop a novel labelling procedure for silica based particles. This strategy can help to gain more detailed in vivo data of mesoporous silica by non-invasive radioimaging in the future. By applying norbornene as a coupling unit the (3 + 2)-cycloaddition reaction proceeds stereoselectively and with high reaction rates

A novel 99mTc labelling strategy for the development of silica based particles for medical applications

The reaction of high-valent fac-{99mTcO3}+ complexes with alkenes ((3+2)-cycloaddition) has been used to develop a novel labelling procedure for silica based particles. This strategy can help to gain more detailed in vivo data of mesoporous silica by non-invasive radioimaging in the future. By applying norbornene as a coupling unit the (3+2)-cycloaddition reaction proceeds stereoselectively and with high reaction rates