May 2018

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Polymeric Nanocapsules for Vaccine Delivery: Influence of the Polymeric Shell on the Interaction With the Immune System.

Posted by on 07 May 2018 | Tagged as: Hepatitis B Alternative Medicine

Related Articles Polymeric Nanocapsules for Vaccine Delivery: Influence of the Polymeric Shell on the Interaction With the Immune System. Front Immunol. 2018;9:791 Authors: Peleteiro M, Presas E, González-Aramundiz JV, Sánchez-Correa B, Simón-Vázquez R, Csaba N, Alonso MJ, González-Fernández Á Abstract The use of biomaterials and nanosystems in antigen delivery has played a major role in the development of novel vaccine formulations in the last few decades. In an effort to gain a deeper understanding of the interactions between these systems and immunocompetent cells, we describe here a systematic in vitro and in vivo study on three types of polymeric nanocapsules (NCs). These carriers, which contained protamine (PR), polyarginine (PARG), or chitosan (CS) in the external shell, and their corresponding nanoemulsion were prepared, and their main physicochemical properties were characterized. The particles had a mean particle size in the range 250-450 nm and a positive zeta potential (~30-40 mV). The interaction of the nanosystems with different components of the immune system were investigated by measuring cellular uptake, reactive oxygen species production, activation of the complement cascade, cytokine secretion profile, and MAP kinases/nuclear factor κB activation. The results of these in vitro cell experiments showed that the NC formulations that included the arginine-rich polymers (PR and PARG) showed a superior ability to trigger different immune processes. Considering this finding, protamine and polyarginine nanocapsules (PR and PARG NCs) were selected to assess the association of the recombinant hepatitis B surface antigen (rHBsAg) as a model antigen to evaluate their ability to produce a protective immune response in mice. In this case, the results showed that PR NCs elicited higher IgG levels than PARG NCs and that this IgG response was a combination of anti-rHBsAg IgG1/IgG2a. This work highlights the potential of PR NCs for antigen delivery as an alternative to other positively charged nanocarriers. PMID: 29725329 [PubMed]

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Polymeric Nanocapsules for Vaccine Delivery: Influence of the Polymeric Shell on the Interaction With the Immune System.

Anoectochilus roxburghii: A review of its phytochemistry, pharmacology, and clinical applications.

Posted by on 04 May 2018 | Tagged as: Hepatitis B Alternative Medicine

Related Articles Anoectochilus roxburghii: A review of its phytochemistry, pharmacology, and clinical applications. J Ethnopharmacol. 2017 Sep 14;209:184-202 Authors: Ye S, Shao Q, Zhang A Abstract ETHNOPHARMACOLOGICAL RELEVANCE: Anoectochilus roxburghii (Orchidaceae), also known as Jinxianlian (Simplified Chinese: ) and Jinxianlan (Simplified Chinese: ), is valued in many Asian countries, where this plant species is used for medicinal, culinary, and ornamental purposes. As a food, A. roxburghii is widely used as a treatment booster and medicine because of its various beneficial properties; these include, most notably, the curative effects of heat dissipation and cooling of blood, elimination of dampness, detoxification, and immunity enhancement. AIM OF THIS REVIEW: This review aims to provide up-to-date information on the phytochemistry, pharmacology, and clinical applications of A. roxburghii. MATERIALS AND METHODS: Relevant information on A. roxburghii was obtained by an online search of worldwide-accepted scientific databases (Web of Science, ScienceDirect, Elsevier, Springer, NCBI, ACS Publications, CNKI, and Wanfang data). RESULTS: Phytochemical investigations have revealed that the major chemical constituents of A. roxburghii are polysaccharides, flavonoids, glycosides, organic acids, volatile compounds, steroids, triterpenes, alkaloids, and nucleosides. These compounds have been proven to be the main bioactive substances responsible for pharmacological activities such as antidiabetic, antilipemic, anti-inflammatory, antiviral, liver protective, renal protective, immunomodulatory, abirritant, sedative, and antineoplastic effects. CONCLUSIONS: A variety of dosage forms of A. roxburghii are currently being applied to patients suffering from hyperuricemia, type 2 diabetes mellitus, chronic hepatitis B, Helicobacter pylori infection, cough-variant asthma, and other conditions. Nevertheless, further research is needed to clarify A. roxburghii absorption, distribution, metabolic, and excretion pathways. Moreover, the toxicology in A. roxburghii and A. formosanus are also in urgent need of research, especially long-term in vivo chronic toxicity tests need to be carried out. PMID: 28755972 [PubMed – indexed for MEDLINE]

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Anoectochilus roxburghii: A review of its phytochemistry, pharmacology, and clinical applications.

Novel treatment strategy with radiofrequency ablation and surgery for pregnant patients with hepatocellular carcinoma: a case report.

Posted by on 04 May 2018 | Tagged as: Hepatitis B Alternative Medicine

Related Articles Novel treatment strategy with radiofrequency ablation and surgery for pregnant patients with hepatocellular carcinoma: a case report. Surg Case Rep. 2018 May 02;4(1):43 Authors: Matsuo M, Furukawa K, Shimizu H, Yoshitomi H, Takayashiki T, Kuboki S, Takano S, Suzuki D, Sakai N, Kagawa S, Nojima H, Ohsuka M Abstract BACKGROUND: Hepatocellular carcinoma (HCC) during pregnancy is rare, with a poor prognosis. Recently, however, increasing resection rates have improved survival rate. Currently, various surgeries are safely performed after the second trimester and termination of pregnancy is not always necessary. However, surgery is sometimes limited by gestational age or the patient’s will. When patients with HCC refuse surgery during pregnancy, we face specific problems with respect to curability and fetal life. Meanwhile, previous studies have revealed radiofrequency ablation (RFA) as a possible alternative to surgery for the treatment of early HCC and shown its favorable local control rate for advanced HCC. However, no case of HCC treated with RFA during pregnancy has yet been reported. CASE PRESENTATION: Here, we present the case of a 33-year-old woman, who was a hepatitis B virus carrier. The patient had been followed up because HBV carrier could develop hepatitis or HCC. And she was diagnosed with a 40-mm HCC tumor at 17 weeks of gestation. She refused surgery because she was pregnant and wanted to continue her pregnancy; therefore, we performed RFA for the local control of her HCC at 17 weeks of gestation and radical surgery at postpartum. She delivered a healthy baby and has survived without recurrence for 6 years after the surgery. CONCLUSIONS: Surgery is potentially a curative treatment for HCC whether the patient is pregnant or not. However, various problems unique to pregnancy make it difficult to perform a straightforward surgery. Our case revealed that RFA can be safely performed in pregnant patients during the second trimester, and the combination of RFA and surgery can radically increase the resection rate of HCC during pregnancy. PMID: 29721779 [PubMed]

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Novel treatment strategy with radiofrequency ablation and surgery for pregnant patients with hepatocellular carcinoma: a case report.