Cancers, Vol. 12, Pages 377: Selective Killing of Activated T Cells by 5-Aminolevulinic Acid Mediated Photodynamic Effect: Potential Improvement of Extracorporeal Photopheresis

In this study, we used the concept of photodynamic therapy (PDT) with 5-aminolevulinic acid (ALA), a precursor of an endogenously synthesized photosensitizer protoporphyrin IX (PpIX) in combination with blue light to explore the possibility of targeting activated human blood T cells ex vivo. With various T-cell activation protocols, a high ALA-induced PpIX production took place in activated CD3+, CD4+CD25+, and CD8+ T cell populations with their subsequent killing after blue light exposure. By contrast, resting T cells were much less damaged by the treatment. The selective and effective killing effect on the activated cells was also seen after co-cultivating activated and resting T cells. Under our clinically relevant experimental conditions, ALA-PDT killed activated T cells more selectively and efficiently than 8-MOP/UV-A. Monocyte-derived dendritic cells (DCs) were not affected by the treatment. Incubation of ALA-PDT damaged T cells with autologous DCs induced a downregulation of the co-stimulatory molecules CD80/CD86 and also upregulation of interleukin 10 (IL-10) and indoleamine 2,3-dioxygenase expression, two immunosuppressive factors that may account for the generation of tolerogenic DCs. Overall, the data support the potential use of ALA-PDT strategy for improving ECP by selective and effective killing of activated T cells and induction of immune tolerance.
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Article Source Type: research

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Abstract Vorinostat has good therapeutic efficacy against primary cutaneous T-cell lymphoma in the refractory stage. However, the molecular mechanism by which it inhibits solid tumors has not been clarified. To investigate the tumor inhibitory mechanism of vorinostat in cervical cancer, this study used Cell Counting Kit-8, flow cytometry, cell invasion and migration assays and the wound healing assay to evaluate the effects of vorinostat on cervical cancer cell proliferation, apoptosis, cell cycle, migration, and invasion. Real-time quantitative PCR and immunoblotting were used to detect gene and protein expressio...
Source: European Journal of Pharmacology - Category: Drugs & Pharmacology Authors: Tags: Eur J Pharmacol Source Type: research
(University of Alberta Faculty of Medicine&Dentistry) A new study shows cancer cells found in the lesions on the skin of cutaneous T-cell lymphoma patients originate from the blood, not the skin as was believed. The protocol to treat the disease was to eliminate the cancer cells from the skin. Based on the findings, researchers believe it would be more effective to treat the malignant clones in the blood rather than waiting until the cells reach the skin and present as lesions.
Source: EurekAlert! - Cancer - Category: Cancer & Oncology Source Type: news
Condition:   Early Stage Mycosis Fungoides Cutaneous T Cell Lymphoma (MF-CTCL) (Stage IA-IB) Intervention:   Drug: chlormethine gel Sponsor:   European Organisation for Research and Treatment of Cancer - EORTC Not yet recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
CONCLUSIONS: ASTX660 demonstrated a manageable safety profile, and exhibited evidence of pharmacodynamic and preliminary clinical activity at the 180-mg/d RP2D. The phase 2 part of the study is ongoing. PMID: 31900279 [PubMed - as supplied by publisher]
Source: Clinical Cancer Research - Category: Cancer & Oncology Authors: Tags: Clin Cancer Res Source Type: research
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Source: Journal of Cancer - Category: Cancer & Oncology Authors: Tags: Research Paper Source Type: research
The Affordable Care Act (ACT) was implemented to increase health care access and reduce the uninsured in the age group between pediatric and Medicare populations (18-64). The association of the ACA with insurance type upon diagnosis (uninsured, Medicaid, non-Medicaid) has been investigated for otolaryngologic, gynecologic, and the top five non-skin malignancies. Such studies for cutaneous malignancies are lacking. We conducted a retrospective analysis of the prospective National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) cancer database to assess the impact of the ACA on new diagnoses of cutaneou...
Source: Dermatology Online Journal - Category: Dermatology Source Type: research
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Source: Giornale Italiano di Dermatologia e Venereologia - Category: Dermatology Tags: G Ital Dermatol Venereol Source Type: research
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