background: tumor associated antigens can be viably used to enhance host immune response.objectives: the immunomodulatory effect of biogenic selenium nanoparticles (senps) was compared between treated and untreated mice with crude antigens of 4t1 cells.materials and methods: female inbred balb/c mice (60) were injected by cancinogenic 4t1 cells causing breast cancer. after 10 days, all tumor be...

estrogens foster immunological processes driven by cd4+ th2 cells and b cells and androgens foster th1 cd4+ and cd8+ cell activity. higher levels of ifn-gamma and il-2 and lower levels of il-4 and il-10 are detected in the phytohemagglutinin-stimulated lymphocyte culture supernatants of men compared with women. it is documented that the physiologic levels of estrogens produced during the luteal...

Background and aim: Efficacy of vaccines is mainly depending on the type of adjuvant used. Efficacy trials of first generation vaccine against leishmaniasis showed a limited efficacy due to lack of an appropriate adjuvant. The objective of this study was to investigate whether positively charged liposomes containing ALM could induce Th1 type immune response in susceptible Balb/c mice.Mate...

In Leishmania (L.) major-infected BALB/c mice Th2-type cells results in disease progression, whereas C57BL/6-infected mice mount a Th1-type response, which leads to control of the infection. Th2 response correlates with IgG1 whereas, Th1 response supports switching to IgG2a subclasses. Since IgG isotype-dominated response depends on different CD4 + T cell subsets, we studied the antigenic profi...

objective: dendritic cells (dcs) play a critical role in the beginning and in the course of immune responses. by observing. considering the defect in these cells in patients with tumor malignancy. in recent years there has been considerable interests in correction and use of these cells. in our prvious studies we showed that lysate of listeria monocytogenese can induce maturation of dendritic c...

normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 aim : in this study we co-administered melittin along with hbsag/alum vaccine to investigate if it helps elicitation of th1/th2 response. background : hepatitis b virus (hbv) infection is a life-threatening liver infection, which can lead to chronic l...

Various strategies for dealing with COVID-19 have been carried out since the WHO declared as an international health emergency. One of preventive is development vaccines. vaccines developed worldwide. As April 13, 2021, there were 184 vaccine candidates in pre-clinical phase and 16 currently III clinical trials using several platforms, such inactivated viruses, vector protein subunits, mRNA. Cl...

We investigated the influence of dendritic cell (DC) CD40 expression on Th2 and Th1 development by in vivo transfer of Ag-pulsed bone marrow-derived DC generated from wild-type (WT) or CD40(-/-) mice. Contrary to expectation, CD40(-/-) DC primed with Ag that inherently induce a Th2 response (soluble egg Ag from Schistosoma mansoni) failed to induce a Th2 response or any compensatory Th1 respons...

in leishmania (l.) major-infected balb/c mice th2-type cells results in disease progression, whereas c57bl/6-infected mice mount a th1-type response, which leads to control of the infection. th2 response correlates with igg1 whereas, th1 response supports switching to igg2a subclasses. since igg isotype-dominated response depends on different cd4 + t cell subsets, we studied the antigenic profi...

Johne's disease (JD), a persistent and slow progressing infection of ruminants such as cows and sheep, is caused by slow replicating bacilli Mycobacterium avium subspecies paratuberculosis (MAP) infecting macrophages in the gut. Infected animals initially mount a cell-mediated CD4 T cell response against MAP which is characterized by the production of interferon gamma (Th1 response). Over time,...