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Photodynamic therapy immunotherapy

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https://www.readbyqxmd.com/read/28537894/intratumoral-depletion-of-regulatory-t-cells-using-cd25-targeted-photodynamic-therapy-in-a-mouse-melanoma-model-induces-antitumoral-immune-responses
#1
Dong Sun Oh, Heegon Kim, Ji Eun Oh, Hi Eun Jung, Yun Soo Lee, Ji-Ho Park, Heung Kyu Lee
Tumor immunotherapy aims to overcome the immunosuppressive microenvironment within tumors, and various approaches have been developed. Tumor-associated T regulatory cells (Tregs) suppress the activation and expansion of tumor antigen-specific effector T cells, thus, providing a permissive environment for tumor growth. Therefore, optimal strategies need to be established to deplete tumor-infiltrated Tregs because systemic depletion of Tregs can result in reduced anti-tumor effector cells and autoimmunity. Here, to selectively deplete Tregs in tumors, we intratumorally injected anti-CD25 antibodies conjugated to Chlorin e6 (Ce6), a photosensitizer that absorbs light to generate reactive oxygen species...
May 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28426952/plant-viruses-and-bacteriophages-for-drug-delivery-in-medicine-and-biotechnology
#2
REVIEW
Anna E Czapar, Nicole F Steinmetz
There are a wide variety of synthetic and naturally occurring nanomaterials under development for nanoscale cargo-delivery applications. Viruses play a special role in these developments, because they can be regarded as naturally occurring nanomaterials evolved to package and deliver cargos. While any nanomaterial has its advantage and disadvantages, viral nanoparticles (VNPs), in particular the ones derived from plant viruses and bacteriophages, are attractive options for cargo-delivery as they are biocompatible, biodegradable, and non-infectious to mammals...
April 17, 2017: Current Opinion in Chemical Biology
https://www.readbyqxmd.com/read/28378336/review-of-treatment-for-alopecia-totalis-and-alopecia-universalis
#3
REVIEW
Sama Kassira, Dorota Z Korta, Lance W Chapman, Francis Dann
Alopecia areata (AA) is an autoimmune disease directed at the hair follicle. Although usually limited to patchy hair loss over the scalp (focalis), AA can present as total loss of scalp hair (totalis; AT) or as total loss of both scalp and body hair (universalis; AU). Management of AT and AU can be challenging, and although multiple treatment modalities have been explored, no therapy is currently FDA-approved. This review focuses on the evidence for current treatment options for AT and AU. The PubMed database was searched from January 1, 2000, to September 1, 2016, for clinical trials, retrospective studies, and case reports of treatments for AT and AU...
April 5, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/28362496/near-infrared-triggered-photodynamic-therapy-with-multitasking-upconversion-nanoparticles-in-combination-with-checkpoint-blockade-for-immunotherapy-of-colorectal-cancer
#4
Jun Xu, Ligeng Xu, Chenya Wang, Rong Yang, Qi Zhuang, Xiao Han, Ziliang Dong, Wenwen Zhu, Rui Peng, Zhuang Liu
While immunotherapy has become a highly promising paradigm for cancer treatment in recent years, it has long been recognized that photodynamic therapy (PDT) has the ability to trigger antitumor immune responses. However, conventional PDT triggered by visible light has limited penetration depth, and its generated immune responses may not be robust enough to eliminate tumors. Herein, upconversion nanoparticles (UCNPs) are simultaneously loaded with chlorin e6 (Ce6), a photosensitizer, and imiquimod (R837), a Toll-like-receptor-7 agonist...
April 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/27976881/photodynamic-therapy-mediated-by-nontoxic-core-shell-nanoparticles-synergizes-with-immune-checkpoint-blockade-to-elicit-antitumor-immunity-and-antimetastatic-effect-on-breast-cancer
#5
Xiaopin Duan, Christina Chan, Nining Guo, Wenbo Han, Ralph R Weichselbaum, Wenbin Lin
An effective, nontoxic, tumor-specific immunotherapy is the ultimate goal in the battle against cancer, especially the metastatic disease. Checkpoint blockade-based immunotherapies have been shown to be extraordinarily effective but benefit only the minority of patients whose tumors have been pre-infiltrated by T cells. Here, we show that Zn-pyrophosphate (ZnP) nanoparticles loaded with the photosensitizer pyrolipid (ZnP@pyro) can kill tumor cells upon irradiation with light directly by inducing apoptosis and/or necrosis and indirectly by disrupting tumor vasculature and increasing tumor immunogenicity...
December 28, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27964825/carbon-dioxide-laser-treatment-of-penile-intraepithelial-neoplasia
#6
Abdullah Zreik, Matthew Rewhorn, Ross Vint, Rehan Khan, David Hendry
INTRODUCTION & OBJECTIVE: The non-invasive nature of penile intraepithelial neoplasia (PeIN) allows for curative penile sparing therapy and is recommended, in their guidelines, by the European Association of Urology (EAU). Treatment options include topical chemotherapy, immunotherapy, laser treatment, photodynamic therapy and surgical excision. Our primary aim was to evaluate the outcome of carbon dioxide (CO2) laser treatment of penile intraepithelial neoplasia. METHODS: A retrospective review of 47 patients who underwent CO2 laser ablation of PeIN, from May 2008 to June 2015, in our tertiary referral centre was performed...
December 7, 2016: Surgeon: Journal of the Royal Colleges of Surgeons of Edinburgh and Ireland
https://www.readbyqxmd.com/read/27960233/iatrogenic-changes-in-the-urinary-tract
#7
REVIEW
Antonio Lopez-Beltran, Gladell P Paner, Rodolfo Montironi, Maria R Raspollini, Liang Cheng
A handful of therapeutic procedures are used to treat malignancies of the urinary tract, most frequently intravesical immunotherapy or chemotherapy, but also neoadjuvant systemic chemotherapy. These treatment modalities produce morphological changes in the urothelium that can be mistaken for carcinoma; in particular, these therapies frequently mimic urothelial carcinoma in situ (CIS) urothelial dysplasia or true invasive neoplasia. Drugs such as mitomycin C used after transurethral resection of bladder tumour to reduce recurrences, bacillus Calmette-Guérin (BCG) intravesical immunotherapy to treat high-risk non-muscle-invasive bladder cancer and urothelial CIS and platin-based systemic chemotherapy to improve postcystectomy disease-specific survival are examples of therapy-related atypia seen in the urinary tract...
January 2017: Histopathology
https://www.readbyqxmd.com/read/27903969/targeting-tissue-factor-as-a-novel-therapeutic-oncotarget-for-eradication-of-cancer-stem-cells-isolated-from-tumor-cell-lines-tumor-xenografts-and-patients-of-breast-lung-and-ovarian-cancer
#8
Zhiwei Hu, Jie Xu, Jijun Cheng, Elizabeth McMichael, Lianbo Yu, William E Carson
Targeting cancer stem cell (CSC) represents a promising therapeutic approach as it can potentially fight cancer at its root. The challenge is to identify a surface therapeutic oncotarget on CSC. Tissue factor (TF) is known as a common yet specific surface target for cancer cells and tumor neovasculature in several solid cancers. However, it is unknown if TF is expressed by CSCs. Here we demonstrate that TF is constitutively expressed on CD133 positive (CD133+) or CD24-CD44+ CSCs isolated from human cancer cell lines, tumor xenografts from mice and breast tumor tissues from patients...
January 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/27807692/tissue-factor-is-an-angiogenic-specific-receptor-for-factor-vii-targeted-immunotherapy-and-photodynamic-therapy
#9
Zhiwei Hu, Jijun Cheng, Jie Xu, Wolfram Ruf, Charles J Lockwood
Identification of target molecules specific for angiogenic vascular endothelial cells (VEC), the inner layer of pathological neovasculature, is critical for discovery and development of neovascular-targeting therapy for angiogenesis-dependent human diseases, notably cancer, macular degeneration and endometriosis, in which vascular endothelial growth factor (VEGF) plays a central pathophysiological role. Using VEGF-stimulated vascular endothelial cells (VECs) isolated from microvessels, venous and arterial blood vessels as in vitro angiogenic models and unstimulated VECs as a quiescent VEC model, we examined the expression of tissue factor (TF), a membrane-bound receptor on the angiogenic VEC models compared with quiescent VEC controls...
February 2017: Angiogenesis
https://www.readbyqxmd.com/read/27793900/the-use-of-toll-like-receptor-4-agonist-to-reshape-the-immune-signature-in-ovarian-cancer
#10
Eva Vindevogel, Thaïs Baert, Anaïs VAN Hoylandt, Godelieve Verbist, Greetje Vande Velde, Abhishek D Garg, Patricia Agostinis, Ignace Vergote, A N Coosemans
BACKGROUND: Dendritic cell (DC) mono-immunotherapy has not been successful so far in ovarian cancer. The addition of a toll-like receptor (TLR) agonist has the potential to boost the innate immune system, in addition to the adoptive immune response initiated by DCs. MATERIALS AND METHODS: ID8-fLuc C57BL/6 mice were injected with DCs loaded with hypericin-based photodynamic therapy-treated tumor lysate. A TLR4 agonist [lipopolysaccharide (LPS)] was administered by different schedules)...
2016: Anticancer Research
https://www.readbyqxmd.com/read/27785021/carbon-nanotubes-as-cancer-therapeutic-carriers-and-mediators
#11
REVIEW
Kuk Hui Son, Jeong Hee Hong, Jin Woo Lee
Carbon nanotubes (CNTs) have received increasing attention in biomedical fields because of their unique structures and properties, including high aspect ratios, large surface areas, rich surface chemical functionalities, and size stability on the nanoscale. Particularly, they are attractive as carriers and mediators for cancer therapy. Through appropriate functionalization, CNTs have been used as nanocarriers for anticancer drugs including doxorubicin, camptothecin, carboplatin, cisplatin, paclitaxel, Pt(II), and Pt(IV), and genes including plasmid DNA, small-interfering RNA, oligonucleotides, and RNA/DNA aptamers...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27575718/chlorin-based-nanoscale-metal-organic-framework-systemically-rejects-colorectal-cancers-via-synergistic-photodynamic-therapy-and-checkpoint-blockade-immunotherapy
#12
Kuangda Lu, Chunbai He, Nining Guo, Christina Chan, Kaiyuan Ni, Ralph R Weichselbaum, Wenbin Lin
Photodynamic therapy (PDT) can destroy local tumors and minimize normal tissue damage, but is ineffective at eliminating metastases. Checkpoint blockade immunotherapy has enjoyed recent success in the clinic, but only elicits limited rates of systemic antitumor response for most cancers due to insufficient activation of the host immune system. Here we describe a treatment strategy that combines PDT by a new chlorin-based nanoscale metal-organic framework (nMOF), TBC-Hf, and a small-molecule immunotherapy agent that inhibits indoleamine 2,3-dioxygenase (IDO), encapsulated in the nMOF channels to induce systemic antitumor immunity...
September 28, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27569086/ablation-of-the-locally-advanced-pancreatic-cancer-an-introduction-and-brief-summary-of-techniques
#13
REVIEW
Athanasios Petrou, Demetrios Moris, Patrick Paul Tabet, Brian David Wensley Richards, Georgios Kourounis
Pancreatic ductal adenocarcinoma is a lethal and late presenting malignancy with dismal survival rates. An estimated total of 330,000 people died from this malignancy in 2012. Although there have been improvements in diagnostic and treatment methods, the survival of late stage pancreatic cancer has not shown significant improvement in the past 4 decades. Multiple treatment approaches are available including chemotherapy, radiotherapy, and immunotherapy, but to this day surgical resection remains the only curative treatment option...
May 2016: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/27530650/core-shell-nanoscale-coordination-polymers-combine-chemotherapy-and-photodynamic-therapy-to-potentiate-checkpoint-blockade-cancer-immunotherapy
#14
Chunbai He, Xiaopin Duan, Nining Guo, Christina Chan, Christopher Poon, Ralph R Weichselbaum, Wenbin Lin
Advanced colorectal cancer is one of the deadliest cancers, with a 5-year survival rate of only 12% for patients with the metastatic disease. Checkpoint inhibitors, such as the antibodies inhibiting the PD-1/PD-L1 axis, are among the most promising immunotherapies for patients with advanced colon cancer, but their durable response rate remains low. We herein report the use of immunogenic nanoparticles to augment the antitumour efficacy of PD-L1 antibody-mediated cancer immunotherapy. Nanoscale coordination polymer (NCP) core-shell nanoparticles carry oxaliplatin in the core and the photosensitizer pyropheophorbide-lipid conjugate (pyrolipid) in the shell (NCP@pyrolipid) for effective chemotherapy and photodynamic therapy (PDT)...
August 17, 2016: Nature Communications
https://www.readbyqxmd.com/read/27525587/acid-activatable-versatile-micelleplexes-for-pd-l1-blockade-enhanced-cancer-photodynamic-immunotherapy
#15
Dangge Wang, Tingting Wang, Jianping Liu, Haijun Yu, Shi Jiao, Bing Feng, Fangyuan Zhou, Yuanlei Fu, Qi Yin, Pengcheng Zhang, Zhiwen Zhang, Zhaocai Zhou, Yaping Li
Photodynamic therapy (PDT) has emerged as a promising clinical modality for cancer therapy due to its ability to initiate an antitumor immune response. However, PDT-mediated cancer immunotherapy is severely impaired by tumor-cell immunosuppression of host T cell antitumor activity through the programmed cell death 1 ligand (PD-L1) and programmed cell death receptor 1 (PD-1) (PD-L1-PD-1) immune checkpoint pathway. Here, we demonstrate that PDT-mediated cancer immunotherapy can be augmented by PD-L1 knockdown (KD) in tumor cells...
September 14, 2016: Nano Letters
https://www.readbyqxmd.com/read/27471605/dc-vaccine-generated-by-ala-pdt-induced-immunogenic-apoptotic-cells-for-skin-squamous-cell-carcinoma
#16
Jie Ji, Yunfeng Zhang, Wei R Chen, Xiuli Wang
Dendritic cell (DC) vaccines were generated by apoptotic squamous cell carcinoma (SCC) cells induced by 5-aminolevulinic acid (ALA)-mediated photodynamic therapy (PDT). ALA-PDT-DC vaccine inhibited the growth of SCC in mice, indicating that immunogenic apoptotic cells can activate an effective antitumor adaptive immunity and lead to a DC vaccine-based cancer immunotherapy.
June 2016: Oncoimmunology
https://www.readbyqxmd.com/read/27429612/fluorescence-guided-resection-of-malignant-glioma-with-5-ala
#17
Sadahiro Kaneko, Sadao Kaneko
Malignant gliomas are extremely difficult to treat with no specific curative treatment. On the other hand, photodynamic medicine represents a promising technique for neurosurgeons in the treatment of malignant glioma. The resection rate of malignant glioma has increased from 40% to 80% owing to 5-aminolevulinic acid-photodynamic diagnosis (ALA-PDD). Furthermore, ALA is very useful because it has no serious complications. Based on previous research, it is apparent that protoporphyrin IX (PpIX) accumulates abundantly in malignant glioma tissues after ALA administration...
2016: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/26989887/nanoparticle-targeting-of-neutrophils-for-improved-cancer-immunotherapy
#18
Dafeng Chu, Qi Zhao, Jian Yu, Faya Zhang, Hui Zhang, Zhenjia Wang
Cancer immunotherapy using tumor-specific monoclonal antibodies presents a novel approach for cancer treatment. A monoclonal antibody TA99 specific for gp75 antigen of melanoma initiates neutrophil recruitment in tumor responsible for cancer therapy. Here, a strategy is reported for hijacking neutrophils in vivo using nanoparticles (NPs) to deliver therapeutics into tumor. In a mouse model of melanoma, it is shown that systemically delivered albumin NPs increase in tumor when TA99 antibody is injected; and the NP tumor accumulation is mediated by neutrophils...
May 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/26936504/dendritic-cell-vaccines-based-on-immunogenic-cell-death-elicit-danger-signals-and-t-cell-driven-rejection-of-high-grade-glioma
#19
Abhishek D Garg, Lien Vandenberk, Carolien Koks, Tina Verschuere, Louis Boon, Stefaan W Van Gool, Patrizia Agostinis
The promise of dendritic cell (DC)-based immunotherapy has been established by two decades of translational research. Of the four malignancies most targeted with clinical DC immunotherapy, high-grade glioma (HGG) has shown the highest susceptibility. HGG-induced immunosuppression is a roadblock to immunotherapy, but may be overcome by the application of T helper 1 (T(H)1) immunity-biased, next-generation, DC immunotherapy. To this end, we combined DC immunotherapy with immunogenic cell death (ICD; a modality shown to induce T(H)1 immunity) induced by hypericin-based photodynamic therapy...
March 2, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/26847542/a-specific-photoimmunotheranostics-agent-to-detect-and-eliminate-skin-cancer-cells-expressing-egfr
#20
Verena von Felbert, Dirk Bauerschlag, Nicolai Maass, Karen Bräutigam, Ivo Meinhold-Heerlein, Mira Woitok, Stefan Barth, Ahmad Fawzi Hussain
PURPOSE: The term "theranostics" represents a new paradigm in medicine especially for cancer treatment. This term was coined by Funkhouser in 2002 and defines a reagent that combines therapeutic and diagnostic properties. It is widely believed that theranostics agents will have considerable impact on healthcare before, during, and after disease by improving cancer prognosis and management simultaneously. Current theranostics approaches still rely on passive tumor targeting strategies, which have scattergun effects and tend to damage both neoplastic and non-neoplastic cells...
May 2016: Journal of Cancer Research and Clinical Oncology
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