PROBLEM: Nasal polyposis is characterized by impaired regulation
of nasal tissue growth, and is associated with chronic
inflammation, sinus infections and low levels of nitric oxide.
Based upon its critical role in mediating cell growth and antimicrobial
function, decrease of nitric oxide has been implicated
in the pathogenesis of nasal polyposis.
METHODS: Western analysis of protein lysates from healthy
controls and nasal polyps was performed for iNOS, pSTAT-1,
and Nitrotyrosine. Nasal lavage measurements of nitrate, nitrite,
and arginine and related byproducts were performed.
Immunohistochemistry staining of nasal polyp tissue was compared
with control biopsy from the middle turbinate.
RESULTS: Nitric oxide metabolites [nitrite and nitrate] in
polyp nasal lavage were lower than controls, but activation of
signal transduction and inducers of transcription 1, which regulates
inducible nitric oxide synthase gene expression and
protein expression, were present at higher levels in polyp than
healthy control tissue. Arginine, methylarginine and endogenous
nitric oxide synthase inhibitors were similar between
polyp and controls. In contrast, superoxide dismutase activity
of polyp tissues was lower than controls, and associated with
increased nitrotyrosine, a biomarker of oxidant consumptive
products of nitric oxide.
CONCLUSION: Taken together, these data suggest that the
nasal polyp environment is characterized by abnormalities in
nitric oxide metabolism that may predispose to altered regulation
of tissue growth and infection.
SIGNIFICANCE: Nitric oxide metabolic abnormalities may
lead to prognostic information related to the severity of disruption,
as well as potentially novel treatments for sinonasal
polyposis targeted against the pathways identified within this
study.
SUPPORT: This study was supported by grants from the
National Institutes of Health HL60917, HL69170, AI70649,
HL081064, and M01 RR018390 from the National Center for
Research Resources, and an internal grant thro
PROBLEM: Nasal polyposis is characterized by impaired regulation
of nasal tissue growth, and is associated with chronic
inflammation, sinus infections and low levels of nitric oxide.
Based upon its critical role in mediating cell growth and antimicrobial
function, decrease of nitric oxide has been implicated
in the pathogenesis of nasal polyposis.
METHODS: Western analysis of protein lysates from healthy
controls and nasal polyps was performed for iNOS, pSTAT-1,
and Nitrotyrosine. Nasal lavage measurements of nitrate, nitrite,
and arginine and related byproducts were performed.
Immunohistochemistry staining of nasal polyp tissue was compared
with control biopsy from the middle turbinate.
RESULTS: Nitric oxide metabolites [nitrite and nitrate] in
polyp nasal lavage were lower than controls, but activation of
signal transduction and inducers of transcription 1, which regulates
inducible nitric oxide synthase gene expression and
protein expression, were present at higher levels in polyp than
healthy control tissue. Arginine, methylarginine and endogenous
nitric oxide synthase inhibitors were similar between
polyp and controls. In contrast, superoxide dismutase activity
of polyp tissues was lower than controls, and associated with
increased nitrotyrosine, a biomarker of oxidant consumptive
products of nitric oxide.
CONCLUSION: Taken together, these data suggest that the
nasal polyp environment is characterized by abnormalities in
nitric oxide metabolism that may predispose to altered regulation
of tissue growth and infection.
SIGNIFICANCE: Nitric oxide metabolic abnormalities may
lead to prognostic information related to the severity of disruption,
as well as potentially novel treatments for sinonasal
polyposis targeted against the pathways identified within this
study.
SUPPORT: This study was supported by grants from the
National Institutes of Health HL60917, HL69170, AI70649,
HL081064, and M01 RR018390 from the National Center for
Research Resources, and an internal grant thro
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ปัญหา : จมูก polyposis เป็นลักษณะที่มีระเบียบ
ของการเจริญเติบโตของเนื้อเยื่อจมูกและมีความสัมพันธ์กับเรื้อรัง
ในfl ammation , การติดเชื้อไซนัสและระดับของไนตริกออกไซด์
ขึ้นอยู่กับบทบาทที่สำคัญในการเป็นตัวกลางการเจริญเติบโตและหน้าที่ของเซลล์จุลชีพ
ลดลงของไนตริกออกไซด์ถูกพาดพิง
ในพยาธิกำเนิดของจมูก polyposis .
วิธีการ : Western analysis of protein lysates from healthy
controls and nasal polyps was performed for iNOS, pSTAT-1,
and Nitrotyrosine. Nasal lavage measurements of nitrate, nitrite,
and arginine and related byproducts were performed.
Immunohistochemistry staining of nasal polyp tissue was compared
with control biopsy from the middle turbinate.
RESULTS: Nitric oxide metabolites [nitrite and nitrate] in
polyp nasal lavage were lower than controls, but activation of
signal transduction and inducers of transcription 1, which regulates
inducible nitric oxide synthase gene expression and
protein expression, were present at higher levels in polyp than
healthy control tissue. Arginine, methylarginine and endogenous
nitric oxide synthase inhibitors were similar between
polyp and controls. In contrast,Superoxide Dismutase กิจกรรม
เนื้อเยื่อเซลต่ำกว่าการควบคุมและเกี่ยวข้องกับ
เพิ่มขึ้น nitrotyrosine , ไบโอมาร์คเกอร์ของอนุมูลอิสระ การบริโภคผลิตภัณฑ์ของไนตริกออกไซด์
.
สรุป : ถ่ายด้วยกัน ข้อมูลเหล่านี้แสดงให้เห็นว่าสภาพแวดล้อมโปลิปจมูก
เป็นลักษณะความผิดปกติในการเผาผลาญ
ไนตริกออกไซด์ที่อาจจูงใจให้เปลี่ยนแปลงระเบียบ
การเจริญเติบโตของเนื้อเยื่อ
และการติดเชื้อความสำคัญ : ไนตริกออกไซด์การเผาผลาญอาหารผิดปกติอาจ
นำไปสู่ข้อมูลที่เกี่ยวข้องกับการใช้ความรุนแรงของ , เช่นเดียวกับการรักษาที่อาจเกิดขึ้น
polyposis เป้าหมายใหม่สำหรับ sinonasal กับทางเดิน identi จึงเอ็ดภายในการศึกษานี้
.
สนับสนุนการศึกษานี้ได้รับการสนับสนุนโดยทุนจากสถาบันแห่งชาติของสุขภาพ
hl60917 hl69170 ai70649 , , , hl081064
,L04 rr018390 และจากศูนย์วิจัยทรัพยากรของชาติ
และภายในให้ thro
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