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Intranasal COVID-19 vaccine developed from bacterial extracellular vesicle induces robust antibody response in preclinical trials

A team of US-based scientists recently developed a novel vaccine candidate against SARS-CoV-2, the causative pathogen of COVID-19. The vaccine is composed of extracellular vesicles of Salmonella typhimurium incorporated with the spike receptor-binding domain (RBD) of SARS-CoV-2. Upon intranasal administration in hamsters, the vaccine induces strong blood antibody titers and protects against severe COVID-19.

30 Jun 2021

Is the SARS-CoV-2 delta variant threatening vaccine efficacy?

A new study in the UK, by researchers at Imperial College London, The Francis Crick Institute and the University of Glasgow, explores the loss of coronavirus disease 2019 (COVID-19) vaccine efficacy against the virus behind the current pandemic caused by the emergence of newer variants that have undergone mutational escape.

30 Jun 2021

Is mild COVID-19 in children due to stronger antiviral innate immunity in the upper airway?

A new preprint on the medRxiv* server adds fuel to this train of thought, showing that the required cell program is already active in children – namely, a higher expression of specific pattern recognition receptors (PRRs), which mediate an interferon (IFN) response.

30 Jun 2021

New method to transport RNA-based drugs to subpopulation of immune cells

Tel Aviv University's groundbreaking technology may revolutionize the treatment of cancer and a wide range of diseases and medical conditions. In the framework of this study, the researchers were able to create a new method of transporting RNA-based drugs to a subpopulation of immune cells involved in the inflammation process, and target the disease-inflamed cell without causing damage to other cells.

30 Jun 2021

Alpha (B.1.1.7) SARS-CoV-2 variant associated with more severe disease in hospitalized women

Researchers in the UK have conducted a study showing that infection with the B.1.1.7 (Alpha) lineage of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) may be associated with an increased risk of death or intensive care unit (ITU) admission among women, compared with non-B.1.1.7 infection.

29 Jun 2021

Widespread SARS-CoV-2 mutation escapes vaccine- and infection-induced CD8 T-cell responses

Researchers in the UK have warned that a widespread mutation that has arisen in the spike protein of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) appears to escape recognition by CD8 T-cell responses in both convalescent patients and recipients of the current coronavirus disease 2019 (COVID-19) vaccines.

29 Jun 2021

LSL60101 compound improves cognitive deficit in murine models with Alzheimer’s

The LSL60101 compound, a specific ligand of the I2-IR receptors in the brain, could shed light on the development of future strategies against Alzheimer's disease.

29 Jun 2021

How does dexamethasone therapy work in severe COVID-19?

The possible mechanisms that result in dexamethasone being an effective drug against severe SARS-CoV-2 infection are investigated in a new study. The paper’s authors advance the hypothesis that SARS-CoV-2 infection induces cell-specific insensitivity to glucocorticoids, possibly as an unintentional result of the viral replication cycle.

29 Jun 2021

Cationic peptides inhibit SARS-CoV-2 cell entry

In a paper recently published in Pathogens, in silico affinity studies by researchers at the University of Illinois, USA, reveal several potential peptide binding sites required for HS-spike protein and ACE2-spike protein bond formation, and synthesis of suitable peptide inhibitors reveals impaired SARS-CoV-2 cell entry.

29 Jun 2021

Study explores structure, activity, and inhibition of TMPRSS2 implicated in SARS-CoV-2 activation

Researchers from Canada recently presented an efficient strategy for recombinant production of enzymatically active TMPRSS2 ectodomain, enabling enzymatic characterization and the 1.95 Å X-ray crystal structure. Their work is published on the bioRxiv* preprint server while awaiting peer-review.

29 Jun 2021

H69/V70 deletion in Alpha variant enables SARS-CoV-2 to overcome chinks in its armor

One of the key mutations seen in the 'Alpha variant' of SARS-CoV-2 - the deletion of two amino acids, H69/V70 - enables the virus to overcome chinks in its armor as it evolves, say an international team of scientists.

29 Jun 2021

Alternative model of Alzheimer's emphasizes different set of mechanisms that lead to neurodegeneration

In the context of recent debate over the FDA's approval of aducanumab, it's refreshing to learn about a model of Alzheimer's neurodegeneration that doesn't start with the pathogenic proteins amyloid or Tau.

29 Jun 2021

Researchers figure out how to build an artificial brain from the bottom up

Rice University scientists are starting small as they begin to figure out how to build an artificial brain from the bottom up.

29 Jun 2021

New drug candidate may reduce anxiety-like behavior in mice

Anxiety, commonly termed as a feeling of fear, dread, and restlessness, is a perfectly normal reaction to stressful situations. However, a state of heightened anxiety, which is the reality for thousands of people who struggle to cope with these feelings, is called anxiety disorder.

29 Jun 2021

Differences in monocyte subsets between severe COVID-19 and long COVID

Researchers in the United States and Costa Rica have identified differences in the proportions of monocyte subsets that occur in severe cases of coronavirus disease 2019 (COVID-19) following infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and post-acute sequelae of COVID-19 (PASC), often referred to as “Long COVID”.

28 Jun 2021

Connective tissue protein promotes immune responses that fight bacterial infections

A connective tissue protein known to support the framework of organs also encourages immune responses that fight bacterial infections, while restraining responses that can be deadly in the condition called sepsis, a new study finds.

28 Jun 2021

Sunflower peptide identified as a potential drug for treating abdominal pain

A naturally occurring peptide in sunflower seeds was synthetically optimised and has now been identified as a potential drug for treating abdominal pain or inflammation (in the gastrointestinal tract, abdominal area and/or internal organs).

28 Jun 2021

Could the activation of FcγRIII/CD16 by anti-spike SARS-CoV-2 antibodies independently determine COVID-19 severity?

A team of scientists from Germany recently investigated whether hyperactivation of immune receptors that recognize the Fc part of an IgG molecule (FcγR) can lead to immunopathologic changes in coronavirus disease 2019 (COVID-19) patients. They have observed that hyperactivation of FcγRIII (CD16) by proinflammatory IgG antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) can significantly contribute to COVID-19 related immunopathology.

28 Jun 2021

Gene variant in African Americans contributes to unnecessary bone marrow biopsies

A gene variant that lowers white blood cell levels and is common in individuals with African ancestry contributes to unnecessary bone marrow biopsies, according to a study published June 28 in JAMA Internal Medicine.

28 Jun 2021

Vaccines and drugs must be adapted to combat emerging SARS-CoV-2 variants, says study

A new review of the emerging variants of concern (VOCs) of the SARS-CoV-2, which has caused the COVID-19 pandemic, shows that there is a major need to constantly re-evaluate the utility of existing therapeutics and vaccines against the virus and to develop new ones.

28 Jun 2021

Receptor News and Research

Intranasal COVID-19 vaccine developed from bacterial extracellular vesicle induces robust antibody response in preclinical trials

Is the SARS-CoV-2 delta variant threatening vaccine efficacy?

Is mild COVID-19 in children due to stronger antiviral innate immunity in the upper airway?

New method to transport RNA-based drugs to subpopulation of immune cells

Alpha (B.1.1.7) SARS-CoV-2 variant associated with more severe disease in hospitalized women

Widespread SARS-CoV-2 mutation escapes vaccine- and infection-induced CD8 T-cell responses

LSL60101 compound improves cognitive deficit in murine models with Alzheimer’s

How does dexamethasone therapy work in severe COVID-19?

Cationic peptides inhibit SARS-CoV-2 cell entry

Study explores structure, activity, and inhibition of TMPRSS2 implicated in SARS-CoV-2 activation

H69/V70 deletion in Alpha variant enables SARS-CoV-2 to overcome chinks in its armor

Alternative model of Alzheimer's emphasizes different set of mechanisms that lead to neurodegeneration

Researchers figure out how to build an artificial brain from the bottom up

New drug candidate may reduce anxiety-like behavior in mice

Differences in monocyte subsets between severe COVID-19 and long COVID

Connective tissue protein promotes immune responses that fight bacterial infections

Sunflower peptide identified as a potential drug for treating abdominal pain

Could the activation of FcγRIII/CD16 by anti-spike SARS-CoV-2 antibodies independently determine COVID-19 severity?

Gene variant in African Americans contributes to unnecessary bone marrow biopsies

Vaccines and drugs must be adapted to combat emerging SARS-CoV-2 variants, says study

Bringing real-time analytics to downstream bioprocess monitoring

Designing fluidic architecture for scalable diagnostic platforms

Evaluating new approaches for rare disease genomics

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