conclusions the current study indicated that the immunoreactivity of secretory iga might have no direct correlation with the colonization of indigenous flora and rejection of exogenous strains in adults. the relationship of microbes, host and dental caries should be in the light of coevolved microecosystem as a whole, but not caused by one factor alone. results the results showed that naturally...

The patients diagnosed with coronavirus disease 2019 （COVID-19） produce IgM and IgG antibodies against severe acute respiratory syndrome 2 （SARS-CoV-2）. However, the frequency duration of antibody production still need to be fully understood. In present study, we investigated after SARS-CoV-2 infection. COVID-19 were monitored over twelve months for antibodies, characteristics these examined. F...

Advances in the field of antibody engineering, and the emergence of powerful screening technology such as filamentous phage display allowed to generate fully human antibodies with high affinities against virtually any desired target from immune or even naIve human repertoires. As a result, the immunogenicity problems related to applications of nonhuman based recombinant antibodies as therapeuti...

background: monoclonal antibodies have been employed extensively for the identification of leishmania species, development of diagnostic tests and in the characterization of defined leishmanial antigens. objectives: identification and characterization of  leishmania spp. directly from cutaneous lesions of infected individuals. methods: an immunoperoxidase test (avidin-biotin technique) using mo...

We have used immunoelectron microscopy to determine the location of an intermediate chain in the isolated outer arm dynein from Chlamydomonas flagella. When the purified alpha beta dimer of the outer arm was incubated with antibodies recognizing two distinct epitopes on its 69-kDa intermediate chain and then negatively stained and examined by electron microscopy, both antibodies appeared to hav...

Previous work indicates that the heavy chain of tetanus toxin is responsible for the binding of the toxin to the neuronal membrane and its subsequent internalization. In the present study, the light chain of tetanus toxin mimicked the holotoxin in inhibiting Ca2+-dependent secretion of [3H]norepinephrine from digitonin-permeabilized adrenal chromaffin cells. Preincubation of tetanus toxin with ...

Rational design of antibodies targeting essential viral proteins can complement the palette of antiviral resistance strategies. Here, stable and high expression of single-chain monoclonal antibodies targeting the nucleoprotein of the economically important plant virus Tomato spotted wilt virus, a protein that is involved in multiple steps in the viral infection cycle, is reported. High cytoplas...

Using a panel of antibodies specific for H and L chain variable region subgroups, a panel of human monoclonal cold agglutinin (CA) and rheumatoid factor (RF) autoantibodies were analyzed. The vast majority of the two types of autoantibodies utilized VkIII L chains, many of which probably derive from the Humkv325 gene. However, while most RFs (77%) utilized VHI H chains, all the CAs used VHII su...