MDK Protein, Human (sf9)

Midkine (MDK) protein is a multifunctional cytokine and growth factor that signals through cell surface proteoglycan and non-proteoglycan receptors. MDK regulates inflammatory responses, cell proliferation, adhesion, growth, survival, tissue regeneration, differentiation, and migration and plays a crucial role in inflammation by recruiting neutrophils and macrophages. MDK Protein, Human (sf9) is the recombinant human-derived MDK protein, expressed by Sf9 insect cells , with tag free. The total length of MDK Protein, Human (sf9) is 143 a.a., with molecular weight of ~18 kDa.

Midkine (MDK) is a secreted protein that serves as a multifunctional cytokine and growth factor, transmitting signals through cell-surface proteoglycan and non-proteoglycan receptors. Engaging in various physiological processes, MDK regulates inflammatory responses, cell proliferation, adhesion, growth, survival, tissue regeneration, differentiation, and migration. It plays a crucial role in inflammatory processes by mediating the recruitment of neutrophils and macrophages to inflammation sites, exhibiting dual activities that include promoting epithelial cell survival and facilitating smooth muscle cell migration following renal and vessel damage. Moreover, MDK suppresses the development of tolerogenic dendritic cells, inhibiting regulatory T cell differentiation and promoting T cell expansion through NFAT signaling and Th1 cell differentiation. MDK's involvement extends to tissue regeneration, contributing to heart damage recovery by negatively regulating inflammatory cell recruitment and mediating cell survival through MAPKs and AKT pathways, along with facilitating liver regeneration, bone repair, and brain development. Interactions with various receptors, such as PTPRZ1, ITGA4:ITGB1 complex, LRP1, and GPC2, underscore MDK's intricate regulatory role in diverse physiological processes.

Human

Sf9 insect cells

Tag Free

P21741 (M1-D143)

4192  [NCBI]

Approximately 18 kDa

Greater than 95% as determined by reducing SDS-PAGE

Lyophilized powder.

Lyophilized from a 0.2 μm filtered solution of 50 mM PBS, 1 M NaCl, pH 6.8. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween 80 are added as protectants before lyophilization.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O.

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.