Potent peptide-conjugated silicon phthalocyanines for tumor photodynamic therapy

Phthalocyanines (Pcs) are a group of promising photosensitizers for use in photodynamic therapy (PDT). However, their extremely low solubility and their strong tendency to aggregate in aqueous solution greatly restrict their application. Conjugation of Pc macrocycles with peptide ligands could be a very useful strategy to optimize the physical properties of Pcs not only by increasing their water solubility and reducing their aggregation but also by endowing the conjugates with a tumor-targeting capability. To develop highly potent photosensitizers for tumor PDT, we prepared new peptide-conjugated photosensitizers using silicon Pc (SiPc), which has much higher photodynamic activity than zinc Pcs, as the light activation moiety and the cRGDfK peptide (or simply cRGD) as the peptide moiety. A polyethylene glycol linker and an extra carboxylic acid group were also tested for introduction into the conjugates to optimize the conjugate structure. The conjugates' photophysical and photodynamic behaviors were then carefully evaluated and compared using in vitro and in vivo experiments. One of the prepared conjugates, RGD-(Linker)2-Glu-SiPc, showed excellent physical properties and photodynamic activity, with an EC50 (half maximal effective concentration) of 10-20 nM toward various cancer cells. This conjugate eradicated human glioblastoma U87-MG tumors in a xenograft murine tumor model after only one dose of photodynamic treatment, with no tumor regrowth during observation for up to 3...
Source: Journal of Cancer - Category: Cancer & Oncology Authors: Tags: Research Paper Source Type: research

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Authors: Herth FJF, Reinmuth N, Wormanns D, Antoch G, Biederer J, Vogel-Claussen J, Kauczor HU, Pfeifer M, Vorstand der Deutschen Gesellschaft für Pneumologie und Beatmungsmedizin, Vorstand der Deutschen Röntgengesellschaft Abstract Substantial new data on early detection of lung cancer with low-dose CT has become available since the last joint statement of the German Roentgenological Society and the German Respiratory Society was published in 2011. The German S3 guideline on lung cancer was revised in 2018 and now contains a weak recommendation towards early detection of lung cancer with low-dose CT in a...
Source: Pneumologie - Category: Respiratory Medicine Tags: Pneumologie Source Type: research
Publication date: 21–27 September 2019Source: The Lancet, Volume 394, Issue 10203Author(s): The Lancet
Source: The Lancet - Category: General Medicine Source Type: research
ConclusionsAdiponectin had no role in the development of gastropathy. Patients with gastropathy had a significant increase in the serum level of cholesterol and triglyceride. There is a significant negative correlation between adiponectin and weight, body mass index, waist circumference, triglyceride, and low-density lipoprotein.
Source: Annals of Medicine and Surgery - Category: General Medicine Source Type: research
Conclusions: The AS04-adjuvanted HPV-16/18 vaccine administered according to a 2-dose schedule to girls 4–6 years of age induced a high and sustained immunologic response with an acceptable safety profile during the 30 months following vaccination.
Source: The Pediatric Infectious Disease Journal - Category: Infectious Diseases Tags: Vaccine Reports Source Type: research
Treatments for advanced prostate cancer that suppress testosterone, a hormone (also called an androgen) that drives the malignant cells to grow and spread, are collectively referred to as androgen deprivation therapies, or ADT. These therapies can significantly extend lifespans in men who have the disease, but they also have a range of challenging side effects. In 2004, Dr. Marc Garnick, Gorman Brothers Professor of Medicine at Harvard Medical School and Beth Israel Deaconess Medical Center, and editor in chief of HarvardProstateKnowledge.org, reported that in some men, an ADT drug called aberelix lengthens the time it tak...
Source: Harvard Health Blog - Category: Consumer Health News Authors: Tags: Health Living With Prostate Cancer Men's Health Prostate Health Prostate Knowledge Treatments HPK Source Type: blogs
Those most likely to skip appointments are men under 30 or over 85, people living in poor areas, and those with gastrointestinal symptoms, the study found.
Source: WebMD Health - Category: Consumer Health News Source Type: news
Publication date: Available online 19 September 2019Source: Seminars in Cancer BiologyAuthor(s): Annie Wai Yeeng Chai, Kue Peng Lim, Sok Ching CheongAbstractOral squamous cell carcinomas (OSCC) are a heterogeneous group of cancers arising from the mucosal lining of the oral cavity. A majority of these cancers are associated with lifestyle risk habits including smoking, excessive alcohol consumption and betel quid chewing. Cetuximab, targeting the epidermal growth factor receptor was approved for the treatment of OSCC in 2006, and remains the only molecular targeted therapy available for OSCC. Here, we reviewed the current ...
Source: Seminars in Cancer Biology - Category: Cancer & Oncology Source Type: research
We report results of preclinical studies and clinical trials, and discuss the mechanism of action of SINEs and their effects in multiple myeloma, non-Hodgkin lymphomas, lymphoblastic leukemia, and acute and chronic myeloid leukemia. In the future, the numerous experimental studies currently underway will allow us to define the role of SINEs and will possibly permit these substances to be introduced into daily clinical practice.
Source: Clinical Lymphoma Myeloma and Leukemia - Category: Cancer & Oncology Source Type: research
Authors: Sena B, Liani S Abstract Interprofessional teamwork is one of the main characteristics of centers specialized in the treatment of breast cancer, known as Breast Units, which since 2016 European legislation has made mandatory for Member States. However, interprofessional collaborative practice (ICP) has often been applied in traditional healthcare contexts on the basis of mono-disciplinary approaches. This paper reports the results of a case study of an Italian Breast Unit carried out through a qualitative research strategy. To understand the case being studied in its complexity the data were drawn from mul...
Source: Journal of Interprofessional Care - Category: Health Management Tags: J Interprof Care Source Type: research
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Source: Cancer Cell - Category: Cancer & Oncology Source Type: research
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