The platform will undergo maintenance on Sep 14 at about 7:45 AM EST and will be unavailable for approximately 2 hours.
2003
DOI: 10.1016/s0304-3835(03)00150-2
|View full text |Cite
|
Sign up to set email alerts
|

pH effects on the cellular uptake of four photosensitizing drugs evaluated for use in photodynamic therapy of cancer

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

1
43
0
2

Year Published

2006
2006
2022
2022

Publication Types

Select...
5
2
1

Relationship

0
8

Authors

Journals

citations
Cited by 55 publications
(46 citation statements)
references
References 16 publications
1
43
0
2
Order By: Relevance
“…First, PSs tend to bind to LDL and are therefore facilitated for uptake in cancer cells, which often express elevated levels of LDL receptors (Kessel 1986, Maziere et al 1991. Second, many of the clinical relevant PSs are weak bases and the acidic tumour environment therefore makes the PSs more lipophilic and consequently able to diffuse more easily into the tumour and adsorb to the tumour membranes (Friberg et al 2003, Gerweck et al 2006. Third, the leaky vasculature and poor lymphatic drainage also probably contributes to the retention of the PS in the tumour (Bugelski et al 1981).…”
Section: Pdt Mediated Targeting Of Tumoursmentioning
confidence: 99%
“…First, PSs tend to bind to LDL and are therefore facilitated for uptake in cancer cells, which often express elevated levels of LDL receptors (Kessel 1986, Maziere et al 1991. Second, many of the clinical relevant PSs are weak bases and the acidic tumour environment therefore makes the PSs more lipophilic and consequently able to diffuse more easily into the tumour and adsorb to the tumour membranes (Friberg et al 2003, Gerweck et al 2006. Third, the leaky vasculature and poor lymphatic drainage also probably contributes to the retention of the PS in the tumour (Bugelski et al 1981).…”
Section: Pdt Mediated Targeting Of Tumoursmentioning
confidence: 99%
“…Additionally, tumors, due to their abnormal vasculature, are characterized by a more acidic environment compared to their surrounding normal tissues. The low pH can enhance the lipophilicity of several PSs, such as hematoporphyrin IX [48] . It has been shown that increasing the lipophilicity of a drug leads to increased tumor uptake [48] (Figure 1).…”
Section: Estradiol Receptor Tetraphenylporphyrinmentioning
confidence: 99%
“…The low pH can enhance the lipophilicity of several PSs, such as hematoporphyrin IX [48] . It has been shown that increasing the lipophilicity of a drug leads to increased tumor uptake [48] (Figure 1). As a result, it is possible to find a concentration gradient of the drug within the breast TME between the tumor tissue and the normal surrounding tissue.…”
Section: Estradiol Receptor Tetraphenylporphyrinmentioning
confidence: 99%
“…O pH dos tecidos tumorais apresenta-se mais baixo do que o pH dos tecidos normais, este fato tem sido proposto como um fator que contribui para a captura seletiva pelo tumor dos diversos tipos de agentes fotossensíveis 48,92,93 . Na literatura a seletividade dos fotossensibilizadores por células tumorais é explicada pelo fato das células tumorais apresentarem grande número de receptores de lipoproteína que são os maiores transportadores de fotossensibilizadores.…”
Section: Espectroscopia De Absorção E De Fluorescênciaunclassified
“…Portanto, pequenas mudanças de pH do tecido podem levar ao deslocamento do equilíbrio entre as várias espécies iônicas do fotossensibilizador bem como sua protonação que pode estar relacionada com o aumento de sua lipofilicidade levando a uma maior captura do fotossensibilizador pelas células 48 . E sabendo que a maioria dos compostos utilizados em PDT são moléculas com estrutura semelhante a porfirina, que possuem sítios de protonação/desprotonação em sua estrutura molecular, é muito importante considerar o pH um dos fatores mais importantes para sua eficácia 48,92,93 . …”
Section: Espectroscopia De Absorção E De Fluorescênciaunclassified