scholarly journals Recent Advances in Photodynamic Imaging and Therapy in Hepatobiliary Malignancies: Clinical and Experimental Aspects

2021 ◽  
Vol 28 (5) ◽  
pp. 4067-4079
Author(s):  
Atsushi Nanashima ◽  
Masahide Hiyoshi ◽  
Naoya Imamura ◽  
Koichi Yano ◽  
Takeomi Hamada ◽  
...  
Keyword(s):  
Aminolevulinic Acid ◽  
Light Exposure ◽  
Tumor Hypoxia ◽  
Local Treatment ◽  
Photodynamic Diagnosis ◽  
Liver Malignancies ◽  
Extrahepatic Cholangiocarcinoma ◽  
Hepatobiliary Malignancies ◽  
Clinical Diagnoses ◽  
Diagnostic Modalities

The therapeutic and diagnostic modalities of light are well known, and derivative photodynamic reactions with photosensitizers (PSs), specific wavelengths of light exposure and the existence of tissue oxygen have been developed since the 20th century. Photodynamic therapy (PDT) is an effective local treatment for cancer-specific laser ablation in malignancies of some organs, including the bile duct. Although curability for extrahepatic cholangiocarcinoma is expected with surgery alone, patients with unresectable or remnant biliary cancer need other effective palliative therapies, including PDT. The effectiveness of PDT for cholangiocarcinoma has been reported experimentally or clinically, but it is not the standard option now due to problems with accompanied photosensitivity, limited access routes of irradiation, tumor hypoxia, etc. Novel derivative treatments such as photoimmunotherapy have not been applied in the field hepatobiliary system. Photodynamic diagnosis (PDD) has been more widely applied in the clinical diagnoses of liver malignancies or liver vascularization. At present, 5-aminolevulinic acid (ALA) and indocyanine green (ICG) dyes are mainly used as PSs in PDD, and ICG has been applied for detecting liver malignancies or vascularization. However, no ideal tools for combining both PDD and PDT for solid tumors, including hepatobiliary malignancies, have been clinically developed. To proceed with experimental and clinical trials, it is necessary to clarify the effective photosensitive drugs that are feasible for photochemical diagnosis and local treatment.

Photodynamic Diagnosis for Malignant Pleural Diseases Using 5-Aminolevulinic Acid and Autofluorescence Imaging System

2019 ◽  
Vol 70 (2) ◽  
pp. 176-176
Author(s):  
M. Kitada ◽  
Y. Ohsaki ◽  
S. Yasuda ◽  
N. Takahashi ◽  
S. Okazaki ◽  
...  
Keyword(s):  
Aminolevulinic Acid ◽  
Imaging System ◽  
Photodynamic Diagnosis ◽  
Autofluorescence Imaging ◽  
Pleural Diseases

scholarly journals Preanesthetic severe postural hypotension following 5-aminolevulinic acid pretreatment in patients for photodynamic diagnosis-assisted urological surgery

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Tohru Shiratori ◽  
Kunihisa Hotta ◽  
Masaaki Satoh ◽  
Chiaki Kiuchi ◽  
Noriyuki Ogawa ◽  
...  
Keyword(s):  
Postural Hypotension ◽  
Aminolevulinic Acid ◽  
Vital Signs ◽  
Photodynamic Diagnosis ◽  
Careful Monitoring ◽  
High Concentration ◽  
Acid Pretreatment ◽  
Case Presentation ◽  
Severe Hypotension ◽  
Prolonged Hypotension

Abstract Background 5-Aminolevulinic acid (5-ALA) is utilized for photodynamic diagnosis-assisted (PDD) surgery. However, it has been associated with vasodilation, hence, occasional hypotension. Case presentation We encountered two patients who had severe postural hypotension following 5-ALA pretreatment prior to an operation. They were scheduled for urological PDD surgery, but upon standing to walk to the operation room, they felt sick because of severe hypotension. One of them underwent the surgery after recovery, but the other surgery was canceled due to a prolonged hypotension that lasted for more than a day. Conclusions Severe postural hypotension may develop as a result of the high concentration of porphyrin precursors, which may affect the nervous system. Severe postural hypotension may be due to 5-ALA-induced autonomic dysfunction as well as vasodilative action of 5-ALA. These observations suggest that in addition to the careful monitoring of patients’ vital signs, standing should be avoided following 5-ALA pretreatment.

scholarly journals Systematic Review and Meta-Analysis of In Vitro Anti-Human Cancer Experiments Investigating the Use of 5-Aminolevulinic Acid (5-ALA) for Photodynamic Therapy

2021 ◽  
Vol 14 (3) ◽  
pp. 229
Author(s):  
Yo Shinoda ◽  
Daitetsu Kato ◽  
Ryosuke Ando ◽  
Hikaru Endo ◽  
Tsutomu Takahashi ◽  
...  
Keyword(s):  
Systematic Review ◽  
Photodynamic Therapy ◽  
Aminolevulinic Acid ◽  
Human Cancer ◽  
Meta Analysis ◽  
Protoporphyrin Ix ◽  
Cell Types ◽  
Amino Acid Derivative ◽  
Photodynamic Diagnosis

5-Aminolevulinic acid (5-ALA) is an amino acid derivative and a precursor of protoporphyrin IX (PpIX). The photophysical feature of PpIX is clinically used in photodynamic diagnosis (PDD) and photodynamic therapy (PDT). These clinical applications are potentially based on in vitro cell culture experiments. Thus, conducting a systematic review and meta-analysis of in vitro 5-ALA PDT experiments is meaningful and may provide opportunities to consider future perspectives in this field. We conducted a systematic literature search in PubMed to summarize the in vitro 5-ALA PDT experiments and calculated the effectiveness of 5-ALA PDT for several cancer cell types. In total, 412 articles were identified, and 77 were extracted based on our inclusion criteria. The calculated effectiveness of 5-ALA PDT was statistically analyzed, which revealed a tendency of cancer-classification-dependent sensitivity to 5-ALA PDT, and stomach cancer was significantly more sensitive to 5-ALA PDT compared with cancers of different origins. Based on our analysis, we suggest a standardized in vitro experimental protocol for 5-ALA PDT.

5-Aminolevulinic acid induced lipid peroxidation after light exposure on human colon carcinoma cells and effects of α-tocopherol treatment

2000 ◽  
Vol 159 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Odrun Arna Gederaas ◽  
Johan W.M Lagerberg ◽  
Ole-Lars Brekke ◽  
Kristian Berg ◽  
Tom M.A.R Dubbelman
Keyword(s):  
Lipid Peroxidation ◽  
Colon Carcinoma ◽  
Aminolevulinic Acid ◽  
Light Exposure ◽  
Human Colon ◽  
Carcinoma Cells ◽  
Colon Carcinoma Cells ◽  
Human Colon Carcinoma

scholarly journals In Vivo Study of the Efficacy and Safety of 5-Aminolevulinic Radiodynamic Therapy for Glioblastoma Fractionated Radiotherapy

2021 ◽  
Vol 22 (18) ◽  
pp. 9762
Author(s):  
Junko Takahashi ◽  
Shinsuke Nagasawa ◽  
Motomichi Doi ◽  
Masamichi Takahashi ◽  
Yoshitaka Narita ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Aminolevulinic Acid ◽  
Combined Treatment ◽  
Reactive Oxygen Species Generation ◽  
Photodynamic Diagnosis ◽  
High Dose ◽  
Severe Toxicity ◽  
Fractionated Radiotherapy ◽  
Post Surgery

To treat malignant glioma, standard fractionated radiotherapy (RT; 60 Gy/30 fractions over 6 weeks) was performed post-surgery in combination with temozolomide to improve overall survival. Malignant glioblastoma recurrence rate is extremely high, and most recurrent tumors originate from the excision cavity in the high-dose irradiation region. In our previous study, protoporphyrin IX physicochemically enhanced reactive oxygen species generation by ionizing radiation and combined treatment with 5-aminolevulinic acid (5-ALA) and ionizing radiation, while radiodynamic therapy (RDT) improved tumor growth suppression in vivo in a melanoma mouse model. We examined the effect of 5-ALA RDT on the standard fractionated RT protocol using U251MG- or U87MG-bearing mice. 5-ALA was orally administered at 60 or 120 mg/kg, 4 h prior to irradiation. In both models, combined treatment with 5-ALA slowed tumor progression and promoted regression compared to treatment with ionizing radiation alone. The standard fractionated RT protocol of 60 Gy in 30 fractions with oral administration of 120 and 240 mg/kg 5-ALA, the human equivalent dose of photodynamic diagnosis, revealed no significant increase in toxicity to normal skin or brain tissue compared to ionizing radiation alone. Thus, RDT is expected to enhance RT treatment of glioblastoma without severe toxicity under clinically feasible conditions.

scholarly journals Dual HER2 Blockade: An Emerging Option in Metastatic Biliary Tract Cancer?

Medicina ◽  
2021 ◽  
Vol 57 (12) ◽  
pp. 1301
Author(s):  
Angela Dalia Ricci ◽  
Alessandro Rizzo
Keyword(s):  
Gallbladder Cancer ◽  
Biliary Tract ◽  
Intrahepatic Cholangiocarcinoma ◽  
Biliary Tract Cancer ◽  
Heterogeneous Group ◽  
Perihilar Cholangiocarcinoma ◽  
Extrahepatic Cholangiocarcinoma ◽  
Tract Cancer ◽  
Hepatobiliary Malignancies

Biliary tract cancer (BTC) includes a heterogeneous group of aggressive and rare hepatobiliary malignancies, including gallbladder cancer, ampullary carcinomas, intrahepatic cholangiocarcinoma (iCCA), and extrahepatic cholangiocarcinoma, further subclassified into distal (dCCA) and perihilar cholangiocarcinoma (pCCA) [...]

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