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https://www.readbyqxmd.com/read/28922621/a-21-winter-seasons-retrospective-study-of-antibody-response-after-influenza-vaccination-in-elderly-60-85%C3%A2-years-old-and-very-elderly-85%C3%A2-years-old-institutionalized-subjects
#1
Emilia Nunzi, Anna Maria Iorio, Barbara Camilloni
Influenza vaccination is considered the best mean for preventing the higher rates of mortality associated with influenza virus infection in the elderly as compared with younger people. Since the number of very elderly subjects, aged >85 years, is rapidly increasing, and some authors reported increments in influenza-associated mortality with age, the aim of this study was to increase the limited information available on the immunogenicity of the influenza vaccines in this age group. This was a retrospective study which analyzed the antibody response induced by commercially available trivalent inactivated influenza vaccines in 1491 elderly subjects (60-85 years old) and 1139 very elderly subjects (>85 years old) during 21 winter seasons included between 1993-1994 and 2014-2015...
September 18, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28921443/polyester-based-nanoparticles-for-the-encapsulation-of-monoclonal-antibodies
#2
Flávia Sousa, Pedro Fonte, Andreia Cruz, Patrick J Kennedy, Inês Mendes Pinto, Bruno Sarmento
Aliphatic polyesters have been widely explored for biomedical applications (e.g., drug delivery systems, biomedical devices, and tissue engineering). Recently, polyesters have been used in nanoparticle formulations for the controlled release of monoclonal antibodies (mAbs) for the enhanced efficacy of antibody-based therapy. Polyester-based nanoparticles for mAb delivery provide decreased antibody dosage, increased antibody stability and protection and longer therapeutic action, ultimately translating to an increased therapeutic index...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28919583/polyclonal-antibody-against-different-extracellular-subdomains-of-her2-induces-tumor-growth-inhibition-in-vitro
#3
Reza Hosseini Ghatar, Tahereh Soltantoyeh, Motahareh Bahadori, Jalal Khoshnoodi, Forough Golsaz Shirazi, Mahmood Jeddi Tehrani, Mohammad Mehdi Amiri, Fazel Shokri
BACKGROUND: Human epidermal growth factor receptor 2 (HER2) has a crucial role in several malignancies. The extracellular domain of HER2 (HER2-ECD) has been extensively employed as an important target in passive and active immunotherapy. Isolated recombinant prokaryotic HER2-ECD subdomains were previously found to be ineffective in inducing anti-tumor antibody response. OBJECTIVE: To employ recombinant eukaryotic HER2-ECD subdomains to raise anti-HER2 antibodies and determine their anti-tumor activity in vitro...
September 2017: Iranian Journal of Immunology: IJI
https://www.readbyqxmd.com/read/28919557/synergistic-effects-of-dendritic-cell-targeting-and-laser-microporation-on-enhancing-epicutaneous-skin-vaccination-efficacy
#4
Yoan Machado, Sanne Duinkerken, Veronika Hoepflinger, Melissa Mayr, Evgeniia Korotchenko, Almedina Kurtaj, Isabel Pablos, Markus Steiner, Angelika Stoecklinger, Joyce Lübbers, Maximillian Schmid, Uwe Ritter, Sandra Scheiblhofer, Michael Ablinger, Verena Wally, Sarah Hochmann, Anna M Raninger, Dirk Strunk, Yvette van Kooyk, Josef Thalhamer, Richard Weiss
Due to its unique immunological properties, the skin is an attractive target tissue for allergen-specific immunotherapy. In our current work, we combined a dendritic cell targeting approach with epicutaneous immunization using an ablative fractional laser to generate defined micropores in the upper layers of the skin. By coupling the major birch pollen allergen Bet v 1 to mannan from S. cerevisiae via mild periodate oxidation we generated hypoallergenic Bet-mannan neoglycoconjugates, which efficiently targeted CD14+ dendritic cells and Langerhans cells in human skin explants...
September 14, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28906131/effects-of-immunomodulators-on-the-response-induced-by-vaccines-against-autoimmune-diseases
#5
Dante J Marciani
A promising treatment for T-cell-mediated autoimmune diseases is the induction of immune tolerance by modulating the immune response against self-antigens, an objective that may be achieved by vaccination. There are two main types of vaccines currently under development. The tolerogenic vaccines, composed of proteins formed by a cytokine fused to a self-antigen, which usually induce tolerance by eliminating the T-cells that are immune reactive against the self-antigen. The immunogenic vaccines, comprised of a self-antigen plus a sole Th2 adjuvant either free or conjugated, that alleviate autoimmunity by switching the immune response against the self-antigen, from a damaging pro-inflammatory Th1/Th17 to an anti-inflammatory Th2 immunity...
September 14, 2017: Autoimmunity
https://www.readbyqxmd.com/read/28903312/gnp-gapdh1-22-nanovaccines-prevent-neonatal-listeriosis-by-blocking-microglial-apoptosis-and-bacterial-dissemination
#6
Ricardo Calderon-Gonzalez, Elisabet Frande-Cabanes, Hector Teran-Navarro, José María Marimon, Javier Freire, David Salcines-Cuevas, M Carmen Fariñas, Claudia Onzalez-Rico, Marco Marradi, Isabel Garcia, Mirian Alkorta-Gurrutxaga, Aida San Nicolas-Gomez, Ana Castañeda-Sampedro, Sonsoles Yañez-Diaz, Soledad Penades, Carmen Punzon, Javier Gomez-Roman, Fernando Rivera, Manuel Fresno, Carmen Alvarez-Dominguez
Clinical cases of neonatal listeriosis are associated with brain disease and fetal loss due to complications in early or late pregnancy, which suggests that microglial function is altered. This is believed to be the first study to link microglial apoptosis with neonatal listeriosis and listeriosis-associated brain disease, and to propose a new nanovaccine formulation that reverses all effects of listeriosis and confers Listeria monocytogenes (LM)-specific immunity. We examined clinical cases of neonatal listeriosis in 2013-2015 and defined two useful prognostic immune biomarkers to design listeriosis vaccines: high anti-GAPDH1-22 titres and tumor necrosis factor (TNF)/interleukin (IL)-6 ratios...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28902708/the-effects-of-mlc901-on-tau-phosphorylation
#7
Wei Thye Lee, Christopher Chen Li Hsian, Yun-An Lim
Tauopathies are neurodegenerative diseases that are characterized by the presence of hyperphosphorylated tau-containing neurofibrillary tangles (NFTs) in the brain and include Alzheimer's disease and frontotemporal dementia, which lack effective disease-modifying treatments. The presence of NFTs is known to correlate with cognition impairment, suggesting that targeting tau hyperphosphorylation may be therapeutically effective. MLC901 is a herbal formulation that is currently used in poststroke recovery and consists of nine herbal components...
September 11, 2017: Neuroreport
https://www.readbyqxmd.com/read/28893476/growth-hormone-releasing-peptide-6-enhanced-antibody-titers-against-subunit-antigens-in-mice-balb-c-tilapia-oreochromis-niloticus-and-african-catfish-clarias-gariepinus
#8
Rebeca Martínez, Liz Hernández, Lázaro Gil, Yamila Carpio, Antonio Morales, Fidel Herrera, Alina Rodríguez-Mallón, Yeny Leal, Aracelys Blanco, Mario Pablo Estrada
Modern subunit vaccines have excellent safety profiles and improved tolerability, but do not elicit strong immune responses without the addition of adjuvants. Developing a safe and affective adjuvant remains a challenge for peptide-based vaccine design. Growth Hormone Releasing Peptide-6 (GHRP-6) is one of the earliest-developed, synthetic, peptidyl growth hormone secretagogue receptor agonists. These compounds mimic the effect of the endogenous ligand, ghrelin. In the present study, we evaluated the ability of GHRP-6 to enhance the humoral immune response against co-injected antigens in mice, tilapia and African catfish...
September 8, 2017: Vaccine
https://www.readbyqxmd.com/read/28891422/water-soluble-and-amphiphilic-phospholipid-copolymers-having-2-methacryloyloxyethyl-phosphorylcholine-units-for-the-solubilization-of-bioactive-compounds
#9
Kazuhiko Ishihara, Mingwei Mu, Tomohiro Konno
We summarize the development and evaluation of new type of phospholipid polymers as a solubilizer for poorly water-soluble compounds. That is, a water-soluble and amphiphilic poly(2-methacryloyloxyethyl phosphorylcholine-random-n-butyl methacrylate) contains 30 mol% hydrophilic 2-methacryloyloxyethyl phosphorylcholine units and its weight-averaged molecular weight is around 5.0 × 10(4). When the polymer is dissolved in an aqueous medium, a large portion of hydrophobic n-butyl methacrylate units assemble, forming polymer aggregates...
September 10, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28890365/detection-and-quantification-of-rituximab-in-the-human-urine
#10
Roland Jacobs, Thais Langer-Jacobus, Michelle Duong, Klaus Stahl, Hermann Haller, Reinhold E Schmidt, Mario Schiffer
B cell depletion by rituximab treatment might be inefficient in patients suffering from nephrotic syndrome. Due to the impaired glomerular filtration barrier a significant portion of the therapeutic antibody might be lost into the urinary space. In order to determine the amount of rituximab in the urine of such patients, CD20+ Daudi cells were stained with the patients' urine followed by a fluorochrome-labeled secondary antibody. Mean fluorescence intensity of that way labeled Daudi cells was determined by flow cytometry...
September 7, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28880521/peptide-dendrons-as-thermal-stability-amplifiers-for-igg1-monoclonal-antibody-biotherapeutics
#11
Rohit Bansal, Sameer Dhawan, Soumili Chatterjee, Govind Maurya, V Haridas, Anurag Singh Rathore
Biotherapeutics such as monoclonal antibodies (mAbs) have a major share of the pharmaceutical industry for treatment of life-threatening chronic diseases such as cancer, skin ailments and immune disorders. Instabilities such as aggregation, fragmentation, oxidation and reduction have resulted in the practice of storing these products at low temperatures (-80ºC to -20ºC). However, reliable storage at these temperatures can be a challenge, particularly in developing and underdeveloped countries and hence lately there has been a renewed interest in creating formulations that would offer stability at higher temperatures (25ºC to 55ºC)...
September 7, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28879213/dna-loaded-cationic-liposomes-efficiently-function-as-a-vaccine-against-malarial-proteins
#12
Wesley L Fotoran, Rachele Santangelo, Beatriz N M de Miranda, Darrell J Irvine, Gerhard Wunderlich
The delivery of antigens as DNA vaccines is an efficient alternative to induce immune responses against antigens, which are difficult to produce in recombinant form. However, the delivery of naked DNA is ineffective or relies on sophisticated ballistic devices. Here, we show a combination of liposome application and naked DNA vaccine that successfully overcomes these problems. Upon entrapment of plasmids encoding different antigens in cationic particles, transfection efficiencies similar to commercial kits were achieved in in vitro cell cultures...
December 15, 2017: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/28874072/liposomal-formulations-in-the-pharmacological-treatment-of-leishmaniasis-a-review
#13
Vanessa Ortega, Selma Giorgio, Eneida de Paula
Conventional chemotherapy for leishmaniasis includes considerably toxic drugs and reports of drug-resistance are not uncommon. Liposomal encapsulated drugs appear as an option for the treatment of leishmaniasis, providing greater efficacy for the active and reducing its side effects by promoting superior tissue absorption, favoring drug penetration into the macrophages, and retarding its clearance from the site of action. In this paper, a review on the advances achieved with liposome-based anti-leishmaniasis drug delivery systems is presented...
September 5, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28871190/new-insights-about-functional-and-cross-reactive-properties-of-antibodies-generated-against-recombinant-tbpbs-of-haemophilus-parasuis
#14
Bibiana Martins Barasuol, João Antônio Guizzo, Jamie Elisabeth Fegan, Sonia Martínez-Martínez, Elías Fernando Rodríguez-Ferri, César Bernardo Gutiérrez-Martín, Luiz Carlos Kreutz, Anthony Bernard Schryvers, Rafael Frandoloso
Vaccines have become fundamental in the control and elimination of Glässer Disease, a systemic disease of pigs caused by Haemophilus parasuis. The classic vaccines available for prevention of this infection were developed without a robust knowledge about host immunological mechanisms. In this study, we demonstrated the presence of cross-reactive epitopes on both the N-lobe and C-lobe of variants of transferrin binding protein B (TbpBs) expressed on the surface of 6 virulent serovars of H. parasuis. Antibodies against TbpB-derived antigens were capable of increasing the phagocytic capacity of neutrophils and were also capable of blocking porcine transferrin from binding to TbpB...
September 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28870463/efficacy-and-safety-of-4-months-of-sublingual-immunotherapy-with-recombinant-mal-d-1-and-bet-v-1-in-patients-with-birch-pollen-related-apple-allergy
#15
Tamar Kinaciyan, Birgit Nagl, Sandra Faustmann, Florian Frommlet, Stephan Kopp, Martin Wolkersdorfer, Stefan Wöhrl, Katharina Bastl, Hans Huber, Uwe Berger, Barbara Bohle
BACKGROUND: Birch pollen-related apple allergy is among the most prevalent food allergies in adolescent/adult individuals and mainly results from sensitization to the major birch pollen allergen Bet v 1 and subsequent cross-reaction with the apple protein Mal d 1. However, specific immunotherapy with birch pollen has inconsistent effects on apple allergy. OBJECTIVE: To compare the safety and efficacy of sublingual immunotherapy (SLIT) with two formulations containing either recombinant (r) Mal d 1 or Bet v 1 on birch pollen-related apple allergy...
September 1, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28866277/evaluation-of-antibody-response-to-an-adjuvanted-hapten-protein-vaccine-as-a-potential-inhibitor-of-sexual-maturation-for-farmed-atlantic-salmon
#16
Darcy S O Mora, Mo D Salman, Christopher A Myrick, Jack C Rhyan, Lowell A Miller, Ellen Marie Sætre, Douglas C Eckery
An experimental contraceptive vaccine was evaluated in Atlantic salmon (Salmo salar). A peptide derived from the beta subunit of luteinizing hormone (LH) was conjugated to two different carrier proteins, bovine serum albumin (BSA) and keyhole limpet hemocyanin (KLH), and formulated with one of four immunostimulants in a water-in-oil emulsion. Specific antibody responses to the peptide and each carrier protein were evaluated. While the antibody response to KLH was stronger than the response to BSA, both carrier proteins stimulated comparable antibody responses to the LH peptide...
August 30, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28860086/assessing-the-impact-of-charge-variants-on-stability-and-viscosity-of-a-high-concentration-antibody-formulation
#17
Shantanu V Sule, Jason E Fernandez, Vincent J Mecozzi, Yana Kravets, William C Yang, Pamela Feng, Suli Liu, Li Zang, Allan D Capili, Tia B Estey, Kapil Gupta
Characterizing molecular charge variants or isoforms is essential for understanding safety, potency and bioavailability of antibody therapeutics. However, there is little information on how they influence stability and viscosity - properties governing immunogenicity and delivery. To bridge this gap, we studied antibody stability as a function of charge variant content generated via bioreactor process. We were able to systematically vary acidic variant levels as a function of bioreactor harvest time. Importantly, we do not observe any impact on aggregation behavior of a formulated antibody at high protein concentration as a function of acidic variant level...
August 28, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28855937/immunization-of-mice-by-a-multimeric-l2-based-linear-epitope-17-36-from-hpv-type-16-18-induced-cross-reactive-neutralizing-antibodies
#18
Farhad Motavalli Khiavi, Arash Arashkia, Maryam Nasimi, Mehdi Mahdavi, Majid Golkar, Farzin Roohvand, Kayhan Azadmanesh
Current licensed and commercially available prophylactic human papillomavirus (HPV) vaccines (Cervarix and quadrivalent/nine valents Gardasil) are based on major capsid protein L1 virus-like particles (VLPs) production which are expensive and type specific. Minor capsid L2-RG1 linear epitope (17-36) is a known candidate for induction of cross-neutralizing antibodies to develop low-cost pan-HPV vaccines. Herein, we report construction and expression of a three tandem repeats of L2-RG1 derived from HPV16 and 18 fused with the same head to tail pattern (HPV16:17-36×3+ HPV18:17-36×3; hereafter termed dual-type fusion L2 peptide) in E...
August 2017: Research in Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28854082/protein-engineering-to-increase-the-potential-of-a-therapeutic-antibody-fab-for-long-acting-delivery-to-the-eye
#19
Devin Tesar, Jacob Luoma, Emily A Wyatt, Catherine Shi, Whitney Shatz, Philip E Hass, Mary Mathieu, Li Yi, Jacob E Corn, Katie F Maass, Kathryn Wang, Michelle Z Dion, Nisana Andersen, Kelly M Loyet, Menno van Lookeren Campagne, Karthikan Rajagopal, Leslie Dickmann, Justin M Scheer, Robert F Kelley
To date, ocular antibody therapies for the treatment of retinal diseases rely on injection of the drug into the vitreous chamber of the eye. Given the burden for patients undergoing this procedure, less frequent dosing through the use of long-acting delivery (LAD) technologies is highly desirable. These technologies usually require a highly concentrated formulation and the antibody must be stable against extended exposure to physiological conditions. Here we have increased the potential of a therapeutic antibody antigen-binding fragment (Fab) for LAD by using protein engineering to enhance the chemical and physical stability of the molecule...
August 30, 2017: MAbs
https://www.readbyqxmd.com/read/28844684/characterization-of-n-acetyl-tryptophan-degradation-in-protein-therapeutic-formulations
#20
Kyle L Hogan, Danielle Leiske, Cleo M Salisbury
N-Acetyl-tryptophan (NAT) is used as a stabilizer for preparations of human serum albumin and has more recently been demonstrated to provide oxidative protection for labile Trp residues in monoclonal antibodies. As a component in the formulations of protein therapeutics, NAT is sacrificially degraded; therefore understanding the identity and quantity of NAT degradants potentially formed in these drug products is essential to understanding the potential patient impact of this additive. Here we report a simple reversed phase chromatography approach that allows systematic investigation of NAT degradation in relevant formulations under stressed conditions...
August 24, 2017: Journal of Pharmaceutical Sciences
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