background: collagen-based three-dimensional (3d) in vitro systems have been introduced to study the physiological states of cells. as a biomolecule, collagen is usually extracted from terrestrial animals whilst aquatic animals like squid contain large amounts of collagen. methods: in order to make effective use of marine organisms, we selected persian gulf squid in 2015 to extract the required...

nowadays, cell -based and tissue engineered products have opened new horizons in treatment of incurable nervous system disorders. the number of studies on the role of schwann cells (sc) in treating nervous disorders is higher than other cell types. different protocols have been suggested for isolation and expansion of sc which most of them have used multiple growth factors, mitogens and fetal b...

background: the present study was conducted to investigate the optimized timing for macrophages induction and nitric oxide (no) production against invading leishmania parasite. methods: the present study examined the murine macrophage cell line, b10r, in three different states. in the first state, the cells were first infected with l. major and then treated with ifn-g and lps as stimulants. in ...

Hepatitis C virus (HCV)-mediated liver disease progression may reflect distinct molecular mechanisms for increased hepatocyte growth and hepatic stellate cell activation. In this study, we have observed that primary human hepatocytes, when infected in vitro with cell culture-grown HCV genotype 1a or 2a, display viral RNA and protein expression. Infected hepatocytes displayed a fibroblast-like s...

We have examined the effect of killing of host monocytes infected with bacillus Calmette-Guérin (BCG) on the viability of the intracellular mycobacteria. Peripheral blood monocytes were infected in vitro with a single bacillus per cell and maintained in culture for 6-8 d to allow the bacilli to replicate. Replicating viable BCG were found singly in perinuclear vacuoles bounded by tightly appose...

We examined the antigenic reactivities and virion associations of glycoproteins that were released into the culture fluids of cells infected with respiratory syncytial (RS) virus. Culture fluids and cell extracts were obtained from cells 24 to 30 h after they were infected with the Long strain of RS virus. Radioimmune precipitation of [3H]glucosamine-labelled glycoproteins by large glycoprotein...

HIV-1 Env mediates fusion of viral and target cell membranes, but it can also mediate fusion of infected (producer) and target cells, thus triggering the formation of multinucleated cells, so-called syncytia. Large, round, immobile syncytia are readily observable in cultures of HIV-1-infected T cells, but these fast growing "fusion sinks" are largely regarded as cell culture artifacts. In contr...

A Vero cell line with a long-term rubella virus persistent infection was maintained for 45 weeks in the presence of anti-rubella virus antibody of sufficient titer to completely neutralize the virus in the culture fluid to determine the effect of the presence of antibody on the maintenance of the persistent infection. Prior to antibody treatment, virus was continuously detected as plaque-formin...

The specificity of murine leukemia virus-induced myelomonocytic phenotypic changes in long-term bone marrow culture have been examined by comparing the effects of polycythemia-inducing Friend leukemia virus (FVP) and Moloney murine leukemia virus (M-MuLV) known to have in vivo target cells in the erythroid and lymphoid lineage, respectively. Noninfected adn M-MuLV-infected cultures showed no mo...