Mono Mac 6 (MM6) is a human monocytic cell line generally used as an in vitro mannequin to display the actions of monocytes.
This cell line extremely resembles mature blood monocytes. They’ve a number of comparable options akin to CD 14 antigen expression, phagocytotic capability, and the useful capability to supply cytokines. Nonetheless, there nonetheless are some variations between Mono Mac 6 cells and human blood monocytes. A examine that compares the manufacturing of cytokines by MM 6 cells in response to numerous stimulants to that of mature monocytes in peripheral blood mononuclear cells, exhibits that MM 6 cells lack the power to precise IFN-α. This cell line is a potent cytokine producer, with poor capability to supply IFN.
The event of in-vitro mannequin methods advance the understanding of endothelial cell interactions and the adhesion properties of Mono Mac 6. It’s proved that these cells present elevated adherence to unstimulated and tumour necrosis issue (TNF)-α (50 U/ml), much like freshly remoted human blood monocytes. And blocking experiments with monoclonal antibody directed in opposition to E-selectin, VCAM-1 and ICAM-1 on HUVEC and CD11b or CD14 on Mono Mac 6 cells display that these molecules all contribute to Mono Mac 6 adherence. What’s extra, the examine signifies that expression of CD11b and CD14 may additionally be answerable for the elevated adhesion of Mono Mac 6. This property makes this cell line nicely fitted to finding out monocyte-endothelial cell interactions.
Utility in Parallel Antimycobacterial Drug Research
A number of macrophage fashions have been used to check the intracellular actions of antituberculosis medication, however there stays no totally differentiated human macrophage cell strains appropriate for parallel use with murine cell strains. Nonetheless, MM6 cells could make a helpful mannequin for testing the intracellular actions of antituberculosis medication. Not like the U937 and THP-1 human monocytic cell strains that have to be induced to develop phagocytic properties, the MM6 has the power to constitutively phagocytize antibody-coated erythrocytes and mycobacteria. Outcomes of researches present that this cell line could be very efficient in figuring out the intracellular actions of antimycobacterial medication.
Utility in Growing In Vitro Assay Predictive of Adjuvant Security in Vivo
There are lots of adjuvant formulations which are beneath improvement, however only a few of them are licensed resulting from issues about hostile uncomfortable side effects. Subunit vaccines composed of recombinant or purified antigens have a superb security document, however they’re poorly immunogenic, requiring adjuvants to activate innate immunity and facilitate antigen particular immune response. The human Mono Mac 6 cell line reveals many traits of mature blood monocytes together with expression of the CD14 molecule and manufacturing of cytokines, akin to interleukin-1 (IL-I), IL-6, and tumor necrosis issue, for which scientists have tried to make use of it to develop in vitro assay predictive of adjuvant security in vivo. This type of developed human cell based mostly assays is not going to solely present an vital instrument for early screening of recent molecular moieties and adjuvant formulations however could help in choice of safer merchandise as nicely.
