Here are some reported volumes in cubic microns. Am J Pediatr Hematol Oncol 1983 Summer;5(2):181-8 Comparative studies of functional characteristics of mononuclear cell subsets and granulocytes. Boxer LA, Yasaka T, Butterick CJ, Tzeng DY, Baehner RL. Two human peripheral blood monocyte subsets and lymphocytes were isolated by counterflow centrifugal elutriation (CCE). The cell volumes of 303 mu3 and 380 mu3 were measured for the smaller and larger monocyte populations, respectively. Superoxide release by large monocytes exposed to opsonized zymosan was five times more active than that of the small monocytes. The production of colony stimulating activity was two-fold greater and the myeloperoxidase activity was 1.4-fold greater by the larger monocytes. Enriched fractions of cytotoxic cells responsible for natural killer (NK) activity against neuroblastoma cells were also obtained by counterflow centrifugal elutriation. Natural killer cells were obtained in larger lymphocyte fractions and had a mean cell volume of 180 mu3. Compared with the NK activity against the neuroblastoma cells, both the small and large monocytes displayed greater antibody-dependent cellular cytotoxicity (ADCC) activity against human erythrocytes. The larger peripheral blood monocytes aggregated in response to FMLP (N-formyl-methionyl-leucyl-phenyl alanine peptide) and PAF (platelet activating factor). Unlike the granulocyte, monocyte aggregation in response to FMLP was not accompanied by degranulation nor was it potentiated by cytochalasin B. In addition, monocyte aggregation could be blocked by benoxaprofen, unlike the granulocyte. Thus, CCE provides a means of isolating subsets of monocytes and lymphocytes and obtaining large numbers of peripheral blood monocytes for functional studies. 2: J Immunol 1981 Oct;127(4):1515-8 Functions of human monocyte and lymphocyte subsets obtained by countercurrent centrifugal elutriation: differing functional capacities of human monocyte subsets. Yasaka T, Mantich NM, Boxer LA, Baehner RL. Two monocyte subsets from the peripheral blood of healthy humans were isolated by countercurrent centrifugal elutriation (CCE), and their functional heterogeneity was assessed. Cell volume of the smaller monocyte population was (332 +/- 32 mu 3), compared with the larger monocytes (380 +/- 30 mu 3). Superoxide release by large monocytes exposed to opsonized zymosan was 1.5-fold more active than those of small monocytes. Furthermore, the production of colony-stimulating factor (CSF) and myeloperoxidase activity by the larger monocytes was 2-fold and 1.4-fold greater than that of small monocytes, respectively. Thus, CCE provides a useful means to isolate 2 subsets of monocytes with similar functional properties but quantitatively different activities. This suggests that the 2 subsets may be closely related in their developmental spectrum. "Gaffin, Stephen L USARIEM" wrote: > Can someone tell me the normal reference ranges of the volumes in > femtoliters of > human adult lymphocytes and monocytes? and/or reference? > > Thank you > Steve > > ************************************************************* > ************************************************************* > ** Stephen L. Gaffin, Ph.D. ** > ** Research Physiologist ** > ** U.S. Army Research Institute for Environmental Medicine ** > ** Natick MA 01760-5007 ** > ** Tel. 508-233-4867 Fax 508-233-5298 ** > ** email stephen.gaffin@na.amedd.army.mil ** > ************************************************************* > *************************************************************
This archive was generated by hypermail 2b29 : Sun Jan 05 2003 - 19:01:21 EST