Biotechnology

Cancer

Biology

Biophysics

Internal medicine

Singlet oxygen

Medicine

Cancer research

Biochemistry

Cancer cell

Metastasis

Photosensitizer

Nanotechnology

Organic chemistry

Photothermal therapy

Nanoreactor

Hydrogen peroxide

Nanoparticle

Chemistry

Materials science

Oxygen

Photochemistry

Biosensor

In vivo

Glucose oxidase

Photodynamic therapy

Nature Communications

Photodynamic therapy (PDT) is ineffective against deeply seated metastatic tumors due to poor penetration of the excitation light. Herein, we developed a biomimetic nanoreactor (bio-NR) to achieve synergistic chemiexcited photodynamic-starvation therapy against tumor metastasis. Photosensitizers on the hollow mesoporous silica nanoparticles (HMSNs) are excited by chemical energy in situ of the deep metastatic tumor to generate singlet oxygen ( 1 O 2 ) for PDT, and glucose oxidase (GOx) catalyzes glucose into hydrogen peroxide (H 2 O 2 ). Remarkably, this process not only blocks the nutrient supply for starvation therapy but also provides H 2 O 2 to synergistically enhance PDT. Cancer cell membrane coating endows the nanoparticle with biological properties of homologous adhesion and immune escape. Thus, bio-NRs can effectively convert the glucose into 1 O 2 in metastatic tumors. The excellent therapeutic effects of bio-NRs in vitro and in vivo indicate their great potential for cancer metastasis therapy.

A biomimetic nanoreactor for synergistic chemiexcited photodynamic therapy and starvation therapy against tumor metastasis