Nanodroplet vaporization with pulsed-laser excitation repeatedly amplifies photoacoustic signals at low vaporization thresholds.

Nanodroplets' explosive vaporization triggered by absorption of laser pulses produces very large volume changes. These volume changes are two orders of magnitude higher than those of thermoelastic expansion generated by equivalent laser pulses, and should generate correspondingly higher photoacoustic waves (PAW). The generation of intense PAWs is desirable in photoacoustic tomography (PAT) to increase sensitivity.

Redaporfin Development for Photodynamic Therapy and its Combination with Glycolysis Inhibitors.

Photodynamic therapy (PDT) remains an underutilized treatment modality in oncology. Many efforts have been dedicated to the development of better photosensitizers, better formulations and delivery methods, rigorous planning of light dose distribution in tissues, mechanistic insight, improvement of treatment protocols and combinations with other therapeutic agents. Hopefully, progress in all these fields will eventually expand the use of PDT.

MedChemTrain e-School 2020: Event Highlights and Insights into Virtual Symposium Organization.

Virtual events are flourishing with the world lockdown due to the COVID-19 pandemic. As a result of the cancelation or postponement of scheduled physical meetings, a revolution in medicinal chemistry scientific meetings occurred, leading to an increase in new strategies to share science. One example are online events, namely e-schools or webinars.

Necrosis Depth and Photodynamic Threshold Dose with Redaporfin-PDT.

Predicting the extent of necrosis in photodynamic therapy (PDT) is critical to ensure that the whole tumor is treated but vital structures, such as major blood vessels in the vicinity of the tumor, are spared. The models developed for clinical planning rely on empirical parameters that change with the nature of the photosensitizer and the target tissue. This work presents an in vivo study of the necrosis in the livers of rats due to PDT with a bacteriochlorin photosensitizer named redaporfin using both frontal illumination and interstitial illumination.