[Sodium caseinate induces differentiation of 32D pluripotential hematopoietic cells].
OBJECTIVE
To determine the role of sodium caseinate (CasNa) in the modulation of hemopoiesis.


METHODS
32D cells, a murine hemopoietic multipotential cell line dependent on interleukin-3 (IL-3) for proliferation and survival, were used. These cells were cultured with 0.5 ng/mL of IL-3, together with different concentrations of CasNa. We evaluated: proliferation (direct counting under the microscope and use of thymidine 3H), morphological differentiation (giemsa staining), cytochemistry (specific staining for monocytes and granulocytes), and function (presence of Fc receptors and reduction of nitro-blue tetrazolium). In addition, we determined cell viability through trypan blue exclusion and apoptosis using the TUNEL assay in situ.


RESULTS
We showed that CasNa induced a decrease in cell proliferation, which is dose dependent, and is neither a result of a diminished cell viability, nor due to an increase in cell death through apoptosis. In addition, CasNa induces cell differentiation towards the monocytic lineage.


CONCLUSIONS
CasNa has the capacity to differentiate 32D cells towards the monocytic lineage, and, importantly, has a potent differentiating activity on 32D cells being able to promote differentiation in a shorter time than the well known factors G-CSF and GM-CSF.
Unidad de Investigación en Diferenciación Celular y Cáncer, FES-Zaragoza, UNAM, México, D.F.
G
G
Ramos
E
E
Santiago
I
I
Martínez
I
I
Zambrano
B
B
Manrique
B
B
Weiss
D017209:Apoptosis; D002364:Caseins / Q000494:pharmacology*; D002454:Cell Differentiation / Q000187:drug effects*; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000187:drug effects*; D006801:Humans
D002364:Caseins