Epidermal growth factor (EGF) fragment-guided anticancer theranostic particles for pH-responsive release of doxorubicin

Publication date: 15 March 2017 Source:International Journal of Pharmaceutics, Volume 519, Issues 1–2 Author(s): Myun Koo Kang, Wei Mao, Jun Bae Lee, Hyuk Sang Yoo EGF fragment (EGFfr) and doxorubicin were chemically co-decorated on single magnetic nanoparticles (MNPs) for concomitant cancer targeting and treatment. Magnetic nanoparticles were prepared by the precipitation of ferric chloride hydrates in an ammonia solution and subsequent surface-functionalization with amines. The terminal thiol group of the EGF fragment was first conjugated to surface amines of the MNPs using a heterofunctional crosslinker, and doxorubicin was sequentially conjugated to the MNPs via a hydrazone linker, where the degree of subsitution of the surface amines to EGFfr was varied from 1% to 40%. The decorated doxorubicin showed clear pH-dependency in the release profile, and doxorubicin showed fast release at pH 5.0 in comparison to pH 7.4. The EGF-decorated MNPs were tested for differential cellular uptakes against EGF overexpressing cells (A549), and the uptake levels gradually increased to 10% and saturated, which was quantified by ICP-OES. Internalized doxorubicin was also visualized by confocal microscopy, and A549 cells with EGF-decorated MNPs with EGF decoration showed higher fluorescence intensity of doxorubicin than those with non-decorated MNPs. Anti-cancer activity of the MNPs was compared at various concentrations of doxorubicin and EGFfr. Decoration of EGFfr significantly incre...
Source: International Journal of Pharmaceutics - Category: Drugs & Pharmacology Source Type: research

Related Links:

Authors: Lee HJ, Han YM, An JM, Kang EA, Park YJ, Cha JY, Hahm KB Abstract INTRODUCTION: Although inflammation is defensive and healing process that maintains organ homeostasis, unresolved inflammation can lead to diseases. Polyunsaturated fatty acids (PUFAs), especially n-6 PUFAs abundant in Western diet, are precursors of pro-inflammatory mediators, whereas n-3 PUFAs possess anti-inflammatory properties. Therefore, interest in the cancer-preventive effect of n-3 PUFAs is increasing. Areas covered: We have observed significant reductions of gastrointestinal (GI) tumorigenesis in the Fat-1 transgenic mouse as evide...
Source: Expert Review of Anticancer Therapy - Category: Cancer & Oncology Tags: Expert Rev Anticancer Ther Source Type: research
was established in 2004 and consents patients in Wales, UK with a known or suspected cancer diagnosis to donate biosamples for future research. The resource is open access to all researchers working in cancer research, regardless of geographic location or employment sector. To December 2017, just over 13,500 patients have donated samples across a variety of tumour types. Tumour and adjacent normal tissue and blood samples are routinely collected, stored and processed to standardised protocols. Bespoke collections for unique samples such as urine or ascites are also available. Pathology data, clinical data including treatm...
Source: Open Journal of Bioresources - Category: Biotechnology Source Type: research
Publication date: 20 December 2018Source: Sensors and Actuators B: Chemical, Volume 277Author(s): Xiangge Tian, Zhenhao Tian, Yan Wang, Jie Hou, Lei Feng, Liang Song, Jingnan Cui, Xiaokui Huo, Xinyu Zhao, Dayong Zhou, Chao Wang, Chengpeng Sun, Jing Ning, Xiaochi MaAbstractCisplatin is a widely used anti-cancer drug in clinic, while many cancer cells gradually exhibited serious cisplatin resistance recently, which resulted in reducing its clinical effects. Glutathione transferases (GSTs) as an extensive expressed metabolic enzyme in human, plays a significant role in the metabolism of cisplatin. Thus, sensitively and accura...
Source: Sensors and Actuators B: Chemical - Category: Chemistry Source Type: research
Four European patients developed breast cancer after receiving organs from the same donor, a case report explains.
Source: CNN.com - Health - Category: Consumer Health News Source Type: news
Conclusions: Significant differences emerged between the stakeholder groups in several ROR scenarios. Policies that are acceptable to participants, researchers and IRBs, and that ensure human subject protections and facilitate research are needed.Public Health Genomics
Source: Public Health Genomics - Category: Genetics & Stem Cells Source Type: research
ConclusionsThe patients with high-risk prostate cancer can develop late recurrence and require long-term follow-up. Identifying patients with higher PSA levels and lymph node invasion has an important predictive role in the first year after surgery. The association between RLP and BR warrants further assessment.ResumenObjetivoDeterminar factores predictivos de recidiva bioquímica (RB) temprana, intermedia y tardía después de prostatectomía radical mínimamente invasiva en pacientes con cáncer de próstata localizado.Material y métodosSe incluyeron 6.195 pacientes con c&...
Source: Actas Urologicas Espanolas - Category: Urology & Nephrology Source Type: research
In American cancer clinics, ringing a bell is now a commonplace celebration for patients who have completed chemotherapy or radiotherapy. But the cathartic ritual leaves some patients feeling very left out.Medscape Medical News
Source: Medscape Medical News Headlines - Category: Consumer Health News Tags: Hematology-Oncology News Source Type: news
ConclusionsPSA levels in midlife strongly predicted total and aggressive PCa among black men. PSA levels among controls were similar to those among white controls in prior studies.Patient summaryProstate-specific antigen (PSA) level during midlife strongly predicted future development of aggressive prostate cancer among black men. Targeted screening based on a midlife PSA might identify men at high risk while minimizing screening in those men at low risk.
Source: European Urology - Category: Urology & Nephrology Source Type: research
Publication date: Available online 17 September 2018Source: European UrologyAuthor(s): Lars Dyrskjøt
Source: European Urology - Category: Urology & Nephrology Source Type: research
We examined whether these practice changes have led to observed improvements in EF rates over time.Design, setting, and participantsWe identified 2364 patients treated with either open or minimally-invasive RP at a single academic center in 2008–2015. To mitigate confounding by the surgical learning curve, only patients treated by surgeons who performed at least 100 procedures were considered.InterventionEF before and after RP was assessed by the International Index of Erectile Function 6 (IIEF-6), with recovery defined as IIEF-6 ≥24.Outcome measurements and statistical analysisWe analyzed EF recovery rates of pat...
Source: European Urology - Category: Urology & Nephrology Source Type: research
More News: Cancer | Cancer & Oncology | Chemistry | Drugs & Pharmacology | Nanotechnology