Many solid tumors are characterized by macrophage infiltration, which results, to a large extent, from the recruitment of peripheral monocytes. The recruitment of monocytes is thought to be induced by the generation of chemoattractants by tumor cells. Since the last review we demonstrated that there was is a strict relationship between the synthesis of the monocyte chemoattractant protein-1 (MCP-l) and the capacity of bone-derived tumor cells to stimulate monocyte migration in vitro. It has not been determined whether the presence of tumor associated macrophages ultimately enhances or inhibits tumor growth. Although monocytes/macrophages have the potential to eradicate tumors, paradoxically, many solid tumors grow in the presence of a dense macrophage infiltrate. Interestingly, macrophages have the capacity to produce growth stimulating factors/cytokines as well as factors/cytokines that can inhibit tumor growth. -Thus, the specific factors/cytokines produced by tumor associated macrophages in situ may ultimately determine the affect that macrophages have on tumor growth in vivo. The studies outlined in this proposal should determine if MCP-1 is expressed by human osteogenic sarcomas and other tumors in vivo, in an immunodeficient mouse model. These studies will determine if the expression of MCP-1 is responsible for the presence of tumor associated macrophages frequently seen in these tumors in vivo. In addition, the production of growth regulating factors/cytokines by tumor associated macrophages will be examined in situ.

Agency
National Institute of Health (NIH)
Institute
National Institute of Dental & Craniofacial Research (NIDCR)
Type
Research Project (R01)
Project #
5R01DE007559-12
Application #
2129861
Study Section
Oral Biology and Medicine Subcommittee 1 (OBM)
Program Officer
Lumelsky, Nadya L
Project Start
1987-09-01
Project End
1997-06-30
Budget Start
1995-07-01
Budget End
1996-06-30
Support Year
12
Fiscal Year
1995
Total Cost
Indirect Cost
Name
Boston University
Department
Dentistry
Type
Schools of Dentistry
DUNS #
604483045
City
Boston
State
MA
Country
United States
Zip Code
02118
Alblowi, Jazia; Kayal, Rayyan A; Siqueira, Michelle et al. (2009) High levels of tumor necrosis factor-alpha contribute to accelerated loss of cartilage in diabetic fracture healing. Am J Pathol 175:1574-85
Behl, Yugal; Krothapalli, Padmaja; Desta, Tesfahun et al. (2009) FOXO1 plays an important role in enhanced microvascular cell apoptosis and microvascular cell loss in type 1 and type 2 diabetic rats. Diabetes 58:917-25
Graves, Dana T; Fine, Daniel; Teng, Yen-Tung A et al. (2008) The use of rodent models to investigate host-bacteria interactions related to periodontal diseases. J Clin Periodontol 35:89-105
Behl, Yugal; Krothapalli, Padmaja; Desta, Tesfahun et al. (2008) Diabetes-enhanced tumor necrosis factor-alpha production promotes apoptosis and the loss of retinal microvascular cells in type 1 and type 2 models of diabetic retinopathy. Am J Pathol 172:1411-8
Alikhani, Mani; Maclellan, Christine M; Raptis, Markos et al. (2007) Advanced glycation end products induce apoptosis in fibroblasts through activation of ROS, MAP kinases, and the FOXO1 transcription factor. Am J Physiol Cell Physiol 292:C850-6
Liu, R; Bal, H S; Desta, T et al. (2006) Diabetes enhances periodontal bone loss through enhanced resorption and diminished bone formation. J Dent Res 85:510-4
Leone, Cataldo W; Bokhadhoor, Haneen; Kuo, David et al. (2006) Immunization enhances inflammation and tissue destruction in response to Porphyromonas gingivalis. Infect Immun 74:2286-92
Alikhani, Mani; Alikhani, Zoubin; Graves, Dana T (2005) FOXO1 functions as a master switch that regulates gene expression necessary for tumor necrosis factor-induced fibroblast apoptosis. J Biol Chem 280:12096-102