Role and mechanism of the expression of matrix metalloproteinase 9 and tumor necrosis factor α in upper and lower respiratory tract inflammation in rats

Objective To investigate the role and mechanism of matrix metalloproteinase 9(MMP-9) and tumor necrosis factor α (TNF-α) in the pathogenesis of allergic rhinitis (AR) and asthma (AS). Methods The rat models of AR and AS were made by injecting ovalbumin. The infiltration of eosinophils and mast cells were detected by hematoxylin-eosin (HE) staining and toluidine blue staining respectively, and the expression of MMP-9 and TNF-α in nasal mucosa and lung tissue were examined by immunohistochemical staining ( SP method). The relationship of their expression with upper and lower respiratory tract inflammation was analyzed. SPSS 13.0 software was used to analyze the data. Results The numbers of MMP-9 positive inflammatory cells in nasal mucosa and lung tissue of AR were ( 154.8±12.0)and (124. 0 ±8.2), (43. 2 ±7.6) and (34. 5 ±5.0) in the control groups, the difference was significant (t value were 24. 260, 29. 525 respectively, all P＜0.05). The numbers of MMP-9 positive inflammatory cells in nasal mucosa and lung tissue of AS were (149.9±11.7)and(120.1±7.3), (48.6 ± 7. 6) and (39.1±5.2)in control groups, the difference was significant (t value were 22. 929 and 28. 530respectively, all P＜0.05).The numbers of TNF-α positive inflammatory cells in nasal mucosa and lung tissue of AR were (188.8±17.0), and (134.8±7.9), (57.6±23.3)and(40. 3 ± 8. 2 ) in control groups, the difference was significant (t value were 13. 836 and 26. 220, all P ＜0.05). The numbers of TNF-α positive inflammatory cells in nasal mucosa and lung tissue of AS were (179. 2 ± 15.4 ) and ( 153. 5 ± 10. 1 ), (70. 5 ±33. 1 ) and ( 33.8 ± 14. 0) in control groups, the difference was significant ( t value were 9. 412 and 21. 858, all P ＜0. 05). There was a correlation between the expression of MMP-9 and TNF-α in nasal mucosa and lung tissue of AR ( r values were 0. 893 and 0. 700 respectively, P values were 0. 001 and 0. 024, respectively ) and AS ( r values were 0. 692 and 0. 644 respectively, P values were 0. 027and 0. 044 respectively) groups. Conclusions The inflammation is similar between AR and AS. The MMP9 and TNF-α may play an important role in the pathogenesis of upper and lower respiratory tract inflammation.     

基质金属蛋白酶及组织金属蛋白酶抑制剂在鼻腔鳞状细胞癌中的表达及意义

Objective To study the expression and significance of matrix metalloproteinase (MMP)2, MMP-9, tissue inhibitor of metalloproteinase (TIMP) 1 and TIMP-2 in nasal cavity squamous cell carcinoma and their signification. Methods Fifty cases of epithelial carcinoma tissue and 50 cases of normal nasal tissue were detected for MMP-2, MMP-9, TIMP-1, TIMP-2 by immunohistochemistry technique (S-P), and their relationship between the expression of MMP-2, MMP-9, TIMP-1, TIMP-2 and some clinical symptoms were analyzed. The SPSS 12. 0 software was used to analyze the data. Results The positive ratio of expression of MMP-2 in 50 cases of epithelial carcinoma was 52. 0% (26/50), which was significantly higher ( x2 = 6. 00, P ＜0. 05 ) than those [28.0% (14/50)] in the normal nasal tissue. The positive ratio of expression of MMP-9 in 50 cases of epithelial carcinoma was 58.0% (29/50), which was significantly higher ( x2 = 12. 8, P ＜ 0. 05 ) than those [10. 0% (5/50)] in the normal nasal tissue. The positive ratio of expression of TIMP-1 in two groups was 74. 0% (37/50), 56. 0% (28/50) respectively.There was no difference between two groups ( x2 = 0. 51, P ＞ 0. 05 ). The positive ratio of expression of TIMP-2 in two groups was 26. 0% ( 13/50), 20% (10/50) respectively. There was no difference between two groups( x2 = 3.35, P ＞ 0. 05). Conclusions There was a close relationship between pathogenesis and development of nasal epithelial carcinoma and the expression of MMP-2, MMP-9 in the epithelial carcinoma tissues. Both MMP and TIMP, especially the unbalance of MMP and TIMP, have prognostic value in nasal cavity squamous cell carcinoma.     

Expression of COX-2 and transcription factor CCAAT enhancer binding proteinβin refractory sinusitis with nasal polyps and its significance

Objective To study the expression and significance of COX-2 and C/EBP-βin refractory sinusitis with nasal polyps,and to explore the relationship between them and the recurrence of sinusitis with nasal polyps.Methods The protein expression of COX-2 and C/EBP-βin 20 cases of refractory sinusitis with nasal polyps,20 cases of sinusitis with nasal polyps and 20 cases of normal nasal mucosa were detected by western blot,and the relationship between the two was compared.Results The expression levels of COX-2 and C/EBP-βin refractory sinusitis with nasal polyps were significantly different from those in refractory sinusitis with nasal polyps(P<0.05);The expression levels of COX-2 and C/EBP-βin sinusitis tissues with nasal polyps were significantly different from those in normal nasal mucosa tissues(P<0.05);The expression levels of COX-2 and C/EBP-βin each group were significantly correlated(P<0.05).Conclusions The high expression of COX-2 and C/EBP-βmay be closely related to postoperative recurrence of sinusitis patients with nasal polyps.Both may be used as objective indicators to judge the postoperative follow-up and recurrence tendency of patients with sinusitis with nasal polyps..     

An evaluation of the inflammatory response of lipopolysaccharide-treated primary dental pulp cells with regard to calcium silicate-based cements

This study compared the biological changes of lipopolysaccharide （LPS）-treated dental pulp （DP） cells directly cultured on mineral trioxide aggregate （MTA） and calcium silicate （CS） cements. DP cells were treated with LPS for 24 h. Then, the LPS-treated DP cells were cultured on MTA or CS cements. Cell viability, cell death mechanism and interleukin （IL）-1β expressions were analysed. A one-way analysis of variance was used to evaluate the significance of the differences between the means. A significantly higher IL-1β expression （2.9-fold） was found for LPS-treated cells （P〈0.05） compared with DP cells without LPS treatment at 24 h. Absorbance values of LPS-treated cells cultured on CS cement were higher than a tissue culture plate. A significant difference （P〈0.05） in cell viability was observed between cells on CS and MTA cements 24 h after seeding. At 48 h, a high concentration of Si （5 mM） was released from MTA, which induced LPS-treated DP cell apoptosis. The present study demonstrates that CS cement is biocompatible with cultured LPS-treated DP cells. MTA stimulates inflammation in LPS-treated DP cells, which leads to greater IL-1β expression and apoptosis.     

逆行荧光标记观察猫上橄榄复合体向内耳的投射

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.     

逆行荧光标记观察猫上橄榄复合体向内耳的投射

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.     

逆行荧光标记观察猫上橄榄复合体向内耳的投射

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.     

逆行荧光标记观察猫上橄榄复合体向内耳的投射

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.     

逆行荧光标记观察猫上橄榄复合体向内耳的投射

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.     

逆行荧光标记观察猫上橄榄复合体向内耳的投射

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.     

逆行荧光标记观察猫上橄榄复合体向内耳的投射

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.     

逆行荧光标记观察猫上橄榄复合体向内耳的投射

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.     

逆行荧光标记观察猫上橄榄复合体向内耳的投射

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.     

逆行荧光标记观察猫上橄榄复合体向内耳的投射

Objective To investigate the distribution and projective feature of cat olivocochlear neurons. Methods Eleven adult cats were divided into two groups randomly. The experimental group of eight cats was injected of I% cholera toxin B (CTB) to the left cochlea, while injected of 5% fluoro gold (FG) to the right cochlea. The control group of three cats was injected of saline to bilateral cochlea. After a survival time of 7 days, serial frozen sections were cut in the cat brainstem. All the sections were processed by immunofluoreseent procedure for CTB and FG, and the labeled olivocochlear neurons were observed byfluorescent microscope. Results In the experimental group, the mean total of olivocochlear neurons labeled by CTB and FG was 3210 ± 168, including lateral olivocochlear neurons (LOC, 2298 ± 120) and medial olivocochlear neurons (MOC,913 ± 64). The labeled neurons were divided into three different types according to their feature of projection: neurons which only projected to the ipsilateral cochlea, neurons which only projected to the contralateral cochlea, and double-labeled neurons which projected both to the ipsilateral and contralateral cochlea, but the double-labeled neurons comprised 3.9% and 15. 1% in the LOC and MOC system respectively. No labeled neurons were found in the control group. Conclusions There are three types of neurons in the cat olivocochlear system. The neurons which projected to the bilateral cochlea may distribute both in the LOC and MOC system.     

基质金属蛋白酶9和肿瘤坏死因子α表达与大鼠上下呼吸道炎性反应一致性研究

目的 通过建立变应性鼻炎(allergic rhinitis,AR)和支气管哮喘(简称哮喘,asthma,AS)动物模型,探讨基质金属蛋白酶9(matrix metalloproteinase-9,MMP-9)和肿瘤坏死因子α(tumor necrosis factor,TNF-α)在上下呼吸道炎性反应一致性中的作用及机制.方法 以卵清蛋白辅以氢氧化铝致敏并激发制成AR和AS大鼠模型.HE染色和甲苯胺蓝染色分别检测AR和AS大鼠模型鼻黏膜及肺组织中嗜酸粒细胞、肥大细胞的表达,免疫组化SP法检测上述组织中MMP-9和TNF-α的表达,分析嗜酸粒细胞、肥大细胞、MMP-9和TNF-α表达与上下呼吸道炎性反应的关系.采用SPSS13.0软件对数据进行统计学分析.结果 MMP-9阳性细胞数在AR组鼻黏膜和肺组织中分别为 (154.8±12.0)、(124.0±8.2)个,在AR对照组分别为(43.2±7.6)、(34.5±5.0)个,差异有统计学意义(t值分别为24.260、29.525,P值均＜0.05);MMP-9阳性细胞数在AS组鼻黏膜和肺组织中分别为(149.9±11.7)、(120.1±7.3)个,在AS对照组分别为(48.6±7.6)、(39.1±5.2)个,差异有统计学意义(t值分别为22.929、28.530,P值均＜0.05).TNF-α阳性细胞数在AR组鼻黏膜和肺组织中分别为(188.8±17.0)、(134.8±7.9)个,在AR对照组分别为(57.6±23.3)、(40.3±8.2)个,差异有统计学意义(t值分别为13.836、26.220,P值均＜0.05);TNF-α阳性细胞数在AS组鼻黏膜和肺组织中分别为(179.2±15.4)、(153.5±10.1)个,在AS对照组分别为(70.5±33.1)、(33.8±14.0)个,差异有统计学意义(t值分别为9.412、21.858,P值均＜0.05).MMP-9与TNF-α在AR组鼻黏膜及肺组织中的表达分别呈正相关(r值分别为0.893和0.700,P值分别为0.001和0.024),二者在AS组鼻黏膜或肺组织中的表达分别呈正相关(r值分别为0.692和0.644,P值分别为0.027和0.044).结论 上下呼吸道炎性反应具有一致性,MMP-9和TNF-α可能在上下呼吸道炎性反应一致性中发挥重要作用.

Abstract：

Objective To investigate the role and mechanism of matrix metalloproteinase 9(MMP-9) and tumor necrosis factor α (TNF-α) in the pathogenesis of allergic rhinitis (AR) and asthma (AS). Methods The rat models of AR and AS were made by injecting ovalbumin. The infiltration of eosinophils and mast cells were detected by hematoxylin-eosin (HE) staining and toluidine blue staining respectively, and the expression of MMP-9 and TNF-α in nasal mucosa and lung tissue were examined by immunohistochemical staining ( SP method). The relationship of their expression with upper and lower respiratory tract inflammation was analyzed. SPSS 13.0 software was used to analyze the data. Results The numbers of MMP-9 positive inflammatory cells in nasal mucosa and lung tissue of AR were ( 154.8±12.0)and (124. 0 ±8.2), (43. 2 ±7.6) and (34. 5 ±5.0) in the control groups, the difference was significant (t value were 24. 260, 29. 525 respectively, all P＜0.05). The numbers of MMP-9 positive inflammatory cells in nasal mucosa and lung tissue of AS were (149.9±11.7)and(120.1±7.3), (48.6 ± 7. 6) and (39.1±5.2)in control groups, the difference was significant (t value were 22. 929 and 28. 530respectively, all P＜0.05).The numbers of TNF-α positive inflammatory cells in nasal mucosa and lung tissue of AR were (188.8±17.0), and (134.8±7.9), (57.6±23.3)and(40. 3 ± 8. 2 ) in control groups, the difference was significant (t value were 13. 836 and 26. 220, all P ＜0.05). The numbers of TNF-α positive inflammatory cells in nasal mucosa and lung tissue of AS were (179. 2 ± 15.4 ) and ( 153. 5 ± 10. 1 ), (70. 5 ±33. 1 ) and ( 33.8 ± 14. 0) in control groups, the difference was significant ( t value were 9. 412 and 21. 858, all P ＜0. 05). There was a correlation between the expression of MMP-9 and TNF-α in nasal mucosa and lung tissue of AR ( r values were 0. 893 and 0. 700 respectively, P values were 0. 001 and 0. 024, respectively ) and AS ( r values were 0. 692 and 0. 644 respectively, P values were 0. 027and 0. 044 respectively) groups. Conclusions The inflammation is similar between AR and AS. The MMP9 and TNF-α may play an important role in the pathogenesis of upper and lower respiratory tract inflammation.     

转录因子RORC2和白细胞介素17的表达与变应性鼻炎症状关系的研究

目的 探讨变应性鼻炎(allergic rhinitis,AR)患者转录因子维甲酸相关孤儿受体(retinoic acid-related orphan receptor variant 2,RORC2)和白细胞介素(interleukin,IL)17的表达与过敏症状的关系.方法 取23例AR患者和16例健康人鼻黏膜、鼻分泌物和静脉血,采用免疫组化、实时荧光定量反转录聚合酶链反应和酶联免疫吸附试验检测其中RORC2和IL-17的表达.对AR患者进行症状评分.采用SPSS 13.0软件对变应性鼻炎组与健康对照组各检测指标进行统计学分析.结果 AR组鼻黏膜中RORC2和IL-17免疫组化染色的阳性细胞率分别为0.17±0.05(-x±s,以下同)和0.72±0.13,高于健康对照组的0.05±0.02和0.27±0.11,差异有统计学意义(t值分别为9.51和11.92,P值均＜0.05).AR组鼻黏膜和外周血RORC2 mRNA的相对表达量为0.063±0.011和0.452±0.031,高于对照组的0.029±0.009和0.239±0.027,差异有统计学意义(t值分别为6.51和3.35,P值均＜0.05).AR组IL-17在鼻黏膜、鼻分泌物和外周血中的水平分别为(70.28±10.69)、(45.32±8.55)、(6.76±1.18)pg/ml,高于对照组的(18.43±8.34)、(6.83±1.31)、(0.74±0.05)pgml,差异有统计学意义(t值分别为7.92、17.66和15.43,P值均＜0.05).AR组鼻过敏症状评分为(9.43±1.27)分,分别与鼻黏膜、外周血RORC2 mRNA的表达以及鼻黏膜、外周血IL-17的表达水平呈正相关(r值分别为0.820、0.746和0.629、0.841,P值均＜0.05).结论 RORC2和IL-17参与了AR的炎性反应,可作为判断病情严重程度的指标之一.

Abstract：

Objective To evaluate the relationship between allergic symptoms and retinoic acid related orphan receptor variant 2 (RORC2) and interleukin(IL) 17 in patients with allergic rhinitis(AR).Methods Blood sample,nasal secretion and nasal mucosa were taken from 23 patients with AR and 16 health individuals.The expression of RORC2 and IL-17 were detected by immunohistochemistry and quantitative real-time fluorescence reverse polymerase chain reaction.The allergic symptoms in patients were graded.Results The rate of positive cells of RORC2 and IL-17 in AR group were 0.17 ±0.05 and 0.72 ±0.13,higher than the 0.05 ± 0.02 and 0.27 ± 0.11 of health controls,the difference was statistically significant(t were 9.51 and 11.92 respectively,all P ＜0.05＝.The expression level of RORC2 mRNA in nasal mucosa and peripheral blood of AR group were 0.063 ± 0.011 and 0.452 ± 0.031,higher than the 0.029 ±0.009 and 0.239 ±0.027 of health controls,the difference was statistically significant (t were 6.51and 3.35 respectively,all P ＜0.05＝.The concentrations of IL-17 in the nasal mucosa,nasal secretions and serum levels of AR group were (70.28 ± 10.69) ,(45.32 ± 8.55) and (6.76 ± 1.18) pg/ml,compared with (18.43 ± 8.34),(6.83 ± 1.31) and (0.74 ±0.05) pg/ml of controls,the difference was statistically significant(t were 7.92,17.66 and 15.43 respectively,all P ＜ 0.05＝.The allergy symptom scores of AR group were 9.43 ± 1.27.There were correlations between the allergic symptom and the expression of RORC2 mRNA and IL-17 in nasal mucosa and peripheral blood (r value were 0.820,0.746,0.629,0.841 respectively,all P ＜ 0.05＝.Conclusion RORC2 and IL-17 involved in the inflammatory response of AR and can be used as an indicator to judge the severity.     

犬去细胞喉支架的生物力学研究

Objective To evaluate the biomechanical characteristics of the decellularized laryngeal scaffold. Methods Ten Chinese adult dogs were randomly divided into two groups: perfusion group (n=5) and control group ( n = 5). The acellular larynx scaffold was obtained from dogs through cranial thyroid arteries perfusion with detergents. Comparative examinations were performed by the macroscopic view,histological view ( hematoxylin and eosin stain, Alcian blue stain and Masson stain), scanning electron microscope (SEM) and biomechanical properties between perfusion group and control group. Results Macroscopic view showed that the decellularized laryngeal scaffold appeared pale asphyxia.HE stain indicated that there were little acellular traces of muscle and mucosa. Alcian blue stain, Masson stain and scanning electron microscope(SEM)suggested that there were no obvious changes about lycosaminoglycan and collagen. The compressive modulus of thyroid cartilage was ( 1.06 ±0. 07) MPa ((-x)±s) in experimental groups and (1.15±0.11) MPa in control group , showing no significant difference (t=1.424,P＞0.05),neither in compressive modulus of annular cartilage(1.68±0.11)MPa in experimental groups and (1.67±0. 09)MPa in control group (t = 0.185, P＞0.05). The tensile strength of thyroid cartilage between experimental (5.74±0.88) MPa and control groups (6.18±1.33) MPa did not have the statistical significance(t =0. 627, P ＞0. 05 ). Conclusion These results indicate that perfusion method can construct a perfect biomechanical acellular larynx scaffold which could be a better selection for laryngeal reconstruction with tissue engineering method.