PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 18449944-5 2009 Our results demonstrate that alumina ceramic particles, regardless of particle size, caused only slight upregulations of RANK, TNF-alpha, and OPG mRNA, whose levels were significantly lower in comparison with those of titanium particles (p < 0.05). Aluminum Oxide 29-36 tumor necrosis factor Homo sapiens 127-136