scholarly journals Buccal and Sublingual Vaccines: A Review on Oral Mucosal Immunization and Delivery Systems

Vaccines ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1177
Author(s):  
Valeria Trincado ◽  
Rikhav P. Gala ◽  
Javier O. Morales
Keyword(s):  
Immune Response ◽  
Mucosal Immunity ◽  
Room Temperature ◽  
Medical Personnel ◽  
Delivery Systems ◽  
Mucosal Immunization ◽  
Routes Of Administration ◽  
Mucosal Delivery ◽  
Effective Immune Response ◽  
The Common

Currently, most vaccines available on the market are for parental use; however, this may not be the best option on several occasions. Mucosal routes of administration such as intranasal, sublingual, and buccal generate great interest due to the benefits they offer. These range from increasing patient compliance to inducing a more effective immune response than that achieved through conventional routes. Due to the activation of the common mucosal immune system, it is possible to generate an effective systemic and local immune response, which is not achieved through parenteral administration. Protection against pathogens that use mucosal entry routes is provided by an effective induction of mucosal immunity. Mucosal delivery systems are being developed, such as films and microneedles, which have proven to be effective, safe, and easy to administer. These systems have multiple advantages over commonly used injections, which are simple to manufacture, stable at room temperature, painless for the patient since they do not require puncture. Therefore, these delivery systems do not require to be administered by medical personnel; in fact, they could be self-administered.

scholarly journals A Review on Current COVID-19 Vaccines and Evaluation of Particulate Vaccine Delivery Systems

Vaccines ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1086
Author(s):  
Sarthak M. Shah ◽  
Hashem O. Alsaab ◽  
Mutasem M. Rawas-Qalaji ◽  
Mohammad N. Uddin
Keyword(s):  
Mucosal Immunity ◽  
Room Temperature ◽  
Cost Effective ◽  
Dosage Forms ◽  
Cold Chain ◽  
World Population ◽  
Health It ◽  
Routes Of Administration ◽  
Effective Manner ◽  
Current Production

First detected in Wuhan, China, a highly contagious coronavirus, severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), also known as COVID-19, spread globally in December of 2019. As of 19 September 2021, approximately 4.5 million people have died globally, and 215 million active cases have been reported. To date, six vaccines have been developed and approved for human use. However, current production and supply capabilities are unable to meet global demands to immunize the entire world population. Only a few countries have been able to successfully vaccinate many of their residents. Therefore, an alternative vaccine that can be prepared in an easy and cost-effective manner is urgently needed. A vaccine that could be prepared in this manner, as well as can be preserved and transported at room temperature, would be of great benefit to public health. It is possible to develop such an alternative vaccine by using nano- or microparticle platforms. These platforms address most of the existing vaccine limitations as they are stable at room temperature, are inexpensive to produce and distribute, can be administered orally, and do not require cold chain storage for transportation or preservation. Particulate vaccines can be administered as either oral solutions or in sublingual or buccal film dosage forms. Besides improved patient compliance, the major advantage of oral, sublingual, and buccal routes of administration is that they can elicit mucosal immunity. Mucosal immunity, along with systemic immunity, can be a strong defense against SARS-CoV-2 as the virus enters the system through inhalation or saliva. This review discusses the possibility to produce a particulate COVID vaccine by using nano- or microparticles as platforms for oral administration or in sublingual or buccal film dosage forms in order to accelerate global vaccination.

scholarly journals Immune response and protection conferred by mucosal immunization with BLSOmp31 using different delivery systems against Brucella ovis in rams

2015 ◽  
Vol 6 ◽  
Author(s):  
DIAZ ALEJANDRA ◽  
QUINTEROS DANIELA ◽  
PAOLICCHI FERNANDO ◽  
RIVERO MARIANA ◽  
CLAUSSE MARIA ◽  
...  
Keyword(s):  
Immune Response ◽  
Delivery Systems ◽  
Mucosal Immunization ◽  
Brucella Ovis

HEALTHCARE CHALLENGES IN GILGIT BALTISTAN: THE WAY FORWARD

1970 ◽  
Vol 7 (2) ◽  
pp. 113-116
Author(s):  
Amimah Fatima Asif
Keyword(s):  
Health Care ◽  
Healthcare Delivery ◽  
Medical Personnel ◽  
Political Regime ◽  
Quality Healthcare ◽  
Accident And Emergency ◽  
Long Time ◽  
The Common ◽  
Gilgit Baltistan ◽  
And Child Health

Quality healthcare delivery is the bedrock to exponentially accelerate the development of a country. Unfortunately, in Pakistan healthcare has been neglected since a long time, with the common man bearing the brunt of this acute situation. There are critical challenges in health care, with paucity of trained human resource and deficit of regulated infrastructure and service delivery being the predominant dilemmas. Primary and secondary healthcare are in an unseemly state, to say the least. Maternal and child health care, accident, and emergency departments and mental health are among the most undermined and forsaken areas of healthcare, primarily in the far flung Gilgit Baltistan region of Pakistan. The only way forward is if the political regime, administration and the medical personnel work in concurrence to revise the health infrastructure of the country.

Formulating SLN and NLC as Innovative Drug Delivery Systems for Non-Invasive Routes of Drug Administration

2020 ◽  
Vol 27 (22) ◽  
pp. 3623-3656 ◽  
Author(s):  
Bruno Fonseca-Santos ◽  
Patrícia Bento Silva ◽  
Roberta Balansin Rigon ◽  
Mariana Rillo Sato ◽  
Marlus Chorilli
Keyword(s):  
Drug Delivery ◽  
Particle Size ◽  
Drug Release ◽  
Drug Loading ◽  
Average Particle Size ◽  
Delivery Systems ◽  
Average Particle ◽  
Minor Importance ◽  
Routes Of Administration ◽  
Non Invasive

Colloidal carriers diverge depending on their composition, ability to incorporate drugs and applicability, but the common feature is the small average particle size. Among the carriers with the potential nanostructured drug delivery application there are SLN and NLC. These nanostructured systems consist of complex lipids and highly purified mixtures of glycerides having varying particle size. Also, these systems have shown physical stability, protection capacity of unstable drugs, release control ability, excellent tolerability, possibility of vectorization, and no reported production problems related to large-scale. Several production procedures can be applied to achieve high association efficiency between the bioactive and the carrier, depending on the physicochemical properties of both, as well as on the production procedure applied. The whole set of unique advantages such as enhanced drug loading capacity, prevention of drug expulsion, leads to more flexibility for modulation of drug release and makes Lipid-based nanocarriers (LNCs) versatile delivery system for various routes of administration. The route of administration has a significant impact on the therapeutic outcome of a drug. Thus, the non-invasive routes, which were of minor importance as parts of drug delivery in the past, have assumed added importance drugs, proteins, peptides and biopharmaceuticals drug delivery and these include nasal, buccal, vaginal and transdermal routes. The objective of this paper is to present the state of the art concerning the application of the lipid nanocarriers designated for non-invasive routes of administration. In this manner, this review presents an innovative technological platform to develop nanostructured delivery systems with great versatility of application in non-invasive routes of administration and targeting drug release.

scholarly journals Comparable Long-Term Rabies Immunity in Foxes after IntraMuscular and Oral Application Using a Third-Generation Oral Rabies Virus Vaccine

Vaccines ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 49
Author(s):  
Verena te Kamp ◽  
Virginia Friedrichs ◽  
Conrad M. Freuling ◽  
Ad Vos ◽  
Madlin Potratz ◽  
...  
Keyword(s):  
Immune Response ◽  
Rabies Virus ◽  
Specific Binding ◽  
Lethal Dose ◽  
Genetically Engineered ◽  
Routes Of Administration ◽  
Safety Studies ◽  
Oral Rabies Vaccine ◽  
Cellular Immune

The live genetically-engineered oral rabies virus (RABV) variant SPBN GASGAS induces long-lasting immunity in foxes and protection against challenge with an otherwise lethal dose of RABV field strains both after experimental oral and parenteral routes of administration. Induction of RABV-specific binding antibodies and immunoglobulin isotypes (IgM, total IgG, IgG1, IgG2) were comparable in orally and parenterally vaccinated foxes. Differences were only observed in the induction of virus-neutralizing (VNA) titers, which were significantly higher in the parenterally vaccinated group. The dynamics of rabies-specific antibodies pre- and post-challenge (365 days post vaccination) suggest the predominance of type-1 immunity protection of SPBN GASGAS. Independent of the route of administration, in the absence of IgG1 the immune response to SPBN GAGAS was mainly IgG2 driven. Interestingly, vaccination with SPBN GASGAS does not cause significant differences in inducible IFN-γ production in vaccinated animals, indicating a relatively weak cellular immune response during challenge. Notably, the parenteral application of SPBN GASGAS did not induce any adverse side effects in foxes, thus supporting safety studies of this oral rabies vaccine in various species.

Molecule-Based Magnets—An Overview

MRS Bulletin ◽  
2000 ◽  
Vol 25 (11) ◽  
pp. 21-30 ◽  
Author(s):  
Joel S. Miller ◽  
Arthur J. Epstein
Keyword(s):  
Low Temperature ◽  
Vapor Deposition ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Magnetic Ordering ◽  
Low Density ◽  
Materials Properties ◽  
The Common ◽  
New Processing ◽  
Very High

Molecule-based magnets are a broad, emerging class of magnetic materials that expand the materials properties typically associated with magnets to include low density, transparency, electrical insulation, and low-temperature fabrication, as well as combine magnetic ordering with other properties such as photoresponsiveness. Essentially all of the common magnetic phenomena associated with conventional transition-metal and rare-earth-based magnets can be found in molecule-based magnets. Although discovered less than two decades ago, magnets with ordering temperatures exceeding room temperature, very high (∼27.0 kOe or 2.16 MA/m) and very low (several Oe or less) coercivities, and substantial remanent and saturation magnetizations have been achieved. In addition, exotic phenomena including photoresponsiveness have been reported. The advent of molecule-based magnets offers new processing opportunities. For example, thin-film magnets can be prepared by means of low-temperature chemical vapor deposition and electrodeposition methods.

scholarly journals Immunocompetent Mouse Models in the Search for Effective Immunotherapy in Glioblastoma

Cancers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 19
Author(s):  
Roxanne Wouters ◽  
Sien Bevers ◽  
Matteo Riva ◽  
Frederik De Smet ◽  
An Coosemans
Keyword(s):  
Immune Response ◽  
Clinical Trials ◽  
Mouse Models ◽  
Standard Of Care ◽  
Preclinical Studies ◽  
Success Rates ◽  
Immunocompetent Mouse ◽  
Full Spectrum ◽  
Effective Immune Response ◽  
Radio Chemotherapy

Glioblastoma (GBM) is the most aggressive intrinsic brain tumor in adults. Despite maximal therapy consisting of surgery and radio/chemotherapy, GBM remains largely incurable with a median survival of less than 15 months. GBM has a strong immunosuppressive nature with a multitude of tumor and microenvironment (TME) derived factors that prohibit an effective immune response. To date, all clinical trials failed to provide lasting clinical efficacy, despite the relatively high success rates of preclinical studies to show effectivity of immunotherapy. Various factors may explain this discrepancy, including the inability of a single mouse model to fully recapitulate the complexity and heterogeneity of GBM. It is therefore critical to understand the features and limitations of each model, which should probably be combined to grab the full spectrum of the disease. In this review, we summarize the available knowledge concerning immune composition, stem cell characteristics and response to standard-of-care and immunotherapeutics for the most commonly available immunocompetent mouse models of GBM.

scholarly journals Vesicle-associated protein 1: a novel ovarian immunocontraceptive target in the common brushtail possum, Trichosurus vulpecula

Reproduction ◽  
2008 ◽  
Vol 136 (5) ◽  
pp. 657-665 ◽  
Author(s):  
A Nation ◽  
S Cui ◽  
L Selwood
Keyword(s):  
Immune Response ◽  
Reproductive Tract ◽  
Major Change ◽  
Brushtail Possum ◽  
Transmission Electron ◽  
Exciting Potential ◽  
The Common ◽  
Immunological Research ◽  
Reproductive Cycles ◽  
Estrous Cycling

Ovarian-based immunological research is currently restricted to proteins of the zona pellucida. This study examined the immunocontraceptive potential of a novel vesicle-associated protein, VAP1, previously isolated from the vesicle-rich hemisphere of the brushtail possum oocyte. Seven female possums were immunized against recombinant glutathione S-transferase-VAP1 fusion protein. Control animals (n=3) received antigen-free vaccinations. Following immunization, regular blood sampling determined the level and duration of immune response. Animals were monitored daily, pre- and post-immunization, to determine estrous cycling activity and the percentage of reproductive cycles yielding viable young. The reproductive tracts and somatic organs of VAP1-immunized (n=7), control-immunized (n=3) and non-immunized (n=5) animals were collected and examined by histology and transmission electron microscopy. VAP1 immunization caused a strong and sustained immune response. Elevated levels of VAP1 antibody binding were detected in sera following initial injections, and immune titers rose as boosters were administered. Immunization had no adverse effect upon animal behavior or body condition. Immunized females demonstrated no major change in annual estrous cycling activity; however, the percentage of reproductive cycles resulting in pouch young decreased significantly (P<0.05) by 40%. Histological and ultrastructural analyses revealed an abundance of lipid-like degradation bodies within the ooplasm of developing oocytes and the cytoplasm of failing uterine zygotes. Active macrophage invasion of enlarged endometrial glands was observed in the uteri of two females. Reproductive tract changes are discussed in relation to observed fertility decline. The results of this study indicate that VAP1 has exciting potential as an immunocontraceptive target for possum control in New Zealand.

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