1.1 Photodynamic Therapy
This review gives an introduction to the photophysical, chemical and medicinal basis of Photodynamic
Therapy (PDT) and reviews the synthesis and properties of a wide variety of porphyrin-based photosensitizers.
including porphyrins, chlorins and bacteriochlorins, which have been used or suggested as photosensitizers in
PDT. I We have not included the polypyrrolic macrocycles known as expanded porphyrins or the
phthalocyanines, and we refer you to comprehensive reviews of these compounds. 2
Photodynamic therapy is a medical treatment which employs the combination of light and a drug to
bring about a cytotoxic or modifying effect to cancerous or otherwise unwanted tissue. It derives great
promise from its dual-selective mode of action: A drug (photosensitizer) of negligible dark toxicity is
introduced into the body and accumulates preferentially in rapidly dividing cells. When the drug reaches an
appropriate ratio of accumulation in diseased versus healthy tissue, a carefully regulated light dose is shone
onto the diseased tissue. Light activates the drug and elicits the toxic action. The amount of light needs to be
large enough to cause the desired response in the tissue, but small enough to spare the surrounding (and
incidentally illuminated) healthy tissue from extensive damage. Shortly after treatment, the damaged cells
become necrotic, or suitably modified
1.1 Photodynamic Therapy This review gives an introduction to the photophysical, chemical and medicinal basis of Photodynamic Therapy (PDT) and reviews the synthesis and properties of a wide variety of porphyrin-based photosensitizers. including porphyrins, chlorins and bacteriochlorins, which have been used or suggested as photosensitizers in PDT. I We have not included the polypyrrolic macrocycles known as expanded porphyrins or the phthalocyanines, and we refer you to comprehensive reviews of these compounds. 2 Photodynamic therapy is a medical treatment which employs the combination of light and a drug to bring about a cytotoxic or modifying effect to cancerous or otherwise unwanted tissue. It derives great promise from its dual-selective mode of action: A drug (photosensitizer) of negligible dark toxicity is introduced into the body and accumulates preferentially in rapidly dividing cells. When the drug reaches an appropriate ratio of accumulation in diseased versus healthy tissue, a carefully regulated light dose is shone onto the diseased tissue. Light activates the drug and elicits the toxic action. The amount of light needs to be large enough to cause the desired response in the tissue, but small enough to spare the surrounding (and incidentally illuminated) healthy tissue from extensive damage. Shortly after treatment, the damaged cells become necrotic, or suitably modified
การแปล กรุณารอสักครู่..
