Steroid-independent upregulation of matrix metalloproteinase 9 in chronic rhinosinusitis patients with radiographic evidence of osteitis.
Int Forum Allergy Rhinol
; 3(5): 364-8, 2013 May.
Article
en En
| MEDLINE
| ID: mdl-23401274
ABSTRACT
BACKGROUND:
Chronic sinonasal inflammation is associated with tissue remodeling, such as osteitis, which may be a marker of refractory disease; however, the pathophysiology of osteitis in chronic rhinosinusitis (CRS) is insufficiently understood.METHODS:
Ethmoid mucosa and bone samples were obtained from 35 medically refractory CRS patients and 9 control subjects. Quantitative real-time polymerase chain reaction (RT-PCR) was performed separately on bone and mucosa for matrix metalloproteinase 2 and 9 (MMP2, MMP9) and tissue inhibitor of matrix metalloproteinase 1 (TIMP1). Osteitis was classified as mild, moderate, or severe by measuring bone thickness of the maxillary, sphenoid, and ethmoid sinuses on multiplanar computed tomography (CT). Patients were classified based on severity of osteitis and compared to controls.RESULTS:
Nine patients demonstrated radiographic evidence of osteitis (mild = 3, moderate/severe = 6). Bone PCR revealed biologically significant upregulation of MMP9 in all patients with CRS, but the magnitude of the upregulation decreased with severity of osteitis. Mucosa PCR showed upregulation of MMP9 in moderate/severe osteitis only. No significant changes were seen in MMP2 or TIMP1 regulation.CONCLUSION:
This is the first study to evaluate the role of MMP in the bone and mucosa of patients with sinonasal osteitis. The pattern of expression suggests there may be a time- and tissue-dependent role for MMP9 in the pathophysiology of osteitis. In addition, MMP9 overexpression is seen despite preoperative oral and intranasal steroid use, suggesting that if MMP9 is an important factor in the development of osteitis then steroids may not be the best treatment in prevention of osteitis.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Sinusitis del Etmoides
/
Rinitis
/
Metaloproteinasa 9 de la Matriz
Tipo de estudio:
Diagnostic_studies
Límite:
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Int Forum Allergy Rhinol
Año:
2013
Tipo del documento:
Article
País de afiliación:
Estados Unidos