A natural human monoclonal antibody targeting Staphylococcus Protein A protects against Staphylococcus aureus bacteremia.

Staphylococcus aureus can cause devastating and life-threatening infections. With the increase in multidrug resistant strains, novel therapies are needed. Limited success with active and passive immunization strategies have been attributed to S.

Relaxin enhances the collagenolytic activity and in vitro invasiveness by upregulating matrix metalloproteinases in human thyroid carcinoma cells.

In this study, we identified differential expression of immunoreactive matrix metalloproteinase 2 (MMP2)/gelatinase A, membrane-anchored MT1-MMP/MMP14, and human relaxin-2 (RLN2) in human benign and malignant thyroid tissues. MMP2 and MT1-MMP were detected in the majority of thyroid cancer tissues and colocalized with RLN2-positive cells. MMP2 was mostly absent in goiter tissues and, similar to RLN2, may serve as a marker for thyroid cancer.

Strategies for the enhancement of recombinant protein production from mammalian cells by growth arrest.

Methods to increase the production of recombinant proteins in mammalian cell cultures have been developed which reduce in-culture growth through prohibiting progression of the cell cycle. This arrest increases the proportion of cells in the G1-phase of the cell cycle, and subsequently increases their specific productivity (Q(P)). Through careful balancing of the decreased growth rate with an increased Q(P), multi-fold increases in recombinant protein yield can be achieved.

CHO cells adapted to hypothermic growth produce high yields of recombinant beta-interferon.

Mild hypothermic conditions (30-33 degrees C) have previously been shown to increase cell-specific productivity (Q(p)) of recombinant proteins from mammalian cells. However, this is often associated with a lower growth rate which off-sets any potential advantage of higher product titers. We report the isolation of a population of Chinese Hamster Ovary (CHO) cells that have been adapted to low-temperature growth by continuous subculture at low temperature for up to 300 days.

High yields of monomeric recombinant beta-interferon from macroporous microcarrier cultures under hypothermic conditions.

Macroporous microcarriers such as Cytopore entrap mammalian cells in a mesh network allowing growth to high cell concentrations in a protected environment within a stirred culture. Chinese hamster ovary (CHO) cells producing recombinant human beta-interferon (IFN-beta) and grown in Cytopore microcarriers showed a 2.6- to 2.