Development of a turn-on fluorescent probe for the imaging of intracellular hypochlorous acid (HClO) during ferroptosis.

Ferroptosis is a burgeoning iron-dependent cell death form, and has close relation with hypochlorous acid (HClO). Exploring the fluctuation of the HClO level in living cells during ferroptosis could contribute to the profound study of the biological functions of HClO during ferroptosis. Here, we present a turn-on probe (RH-C) for the imaging of intracellular HClO during ferroptosis. The probe RH-C utilized the N,N-dimethylthiocarbamate group as a selective recognition site for HClO, and displayed desirable sensitivity and selectivity to HClO. The probe RH-C could detect the exogenous and endogenous HClO in living cells. Furthermore, RH-C was competent in monitoring the changes of endogenous HClO level during the process of ferroptosis. Biological imaging results suggested that erastin-induced ferroptosis can result in the excessive production of the endogenous HClO, and ferrostatin-1 (Fer-1) and vitamin E (VE) could block the massive accumulation of HClO in living cells.

Propylenella binzhouense gen. nov., sp. nov. isolated from activated sludge, and proposal of Propylenellaceae fam. nov.

A Gram-stain-negative, non-spore-forming, non-motile, short-rod-shaped, and aerobic bacterial strain (designated L72T) was isolated from propylene oxide saponification wastewater activated sludge obtained from a wastewater treatment facility in Binzhou (Shandong Province, PR China). Strain L72T grew between 25 and 40 °C (optimum growth at 30 °C). The pH range for growth was between 6.0 and 8.0 (optimum growth at pH 7.0). The range of NaCl concentrations for the growth of strain L72T was 0-3.0 % (w/v), with optimum growth at 1.0-2.0 % (w/v). The major cellular fatty acids of strain L72T were C19:0cyclo ω8c, C18:1ω7c, iso-C15:0, and anteiso-C15:0. Strain L72T contained Q-10 as the predominant respiratory quinone. The polar lipid profile was composed of Phosphatidylcholine, Glycolipid, Aminophospholipid, Phosphatidylethanolamine, Phosphatidylserine, Phosphatidyldimethylethanolamine, one unknown lipid (L) and two unidentified Phospholipids (PL). Genome sequencing revealed a genome size of 4,703,686 bp and a G + C content of 69.0 mol%. The 16S rRNA gene sequence similarities of strain L72T with other species were less than 94%. Phylogenetic analyses based on 16S rRNA gene sequences and genome data, revealed that strain L72T formed a distinct phylogenetic lineage within the order Hyphomicrobiales, separating them from members of all families. Strain L72T showed 70.7% average nucleotide identity and 18.6% digital DNA-DNA hybridization identity with the closely related species Rhodoligotrophos defluvii. Based on the phenotypic, phylogenetic and chemotaxonomic data, a new family Propylenellaceae fam. nov. comprising the genus Propylenella gen. nov. and species Propylenella binzhouense sp. nov. is proposed. The type strain is L72T (=  CCTCC AB 2019081T  =  KCTC 72254T).

MicroRNA­15b­5p exerts its tumor repressive role via targeting GDI2: A novel insight into the pathogenesis of thyroid carcinoma.

Thyroid carcinoma (THCA) is a malignant tumor of the endocrine system. Previous studies have revealed the vital roles of microRNAs (miRNAs/miRs) in THCA procession. The present study aimed to explore the effects of miR­15b­5p on the progression of THCA and its targeting mechanism. The data of THCA and healthy samples were firstly collected from starbase2.0 and used to analyze the relationship of miR­15b­5p with THCA. Dual­luciferase assay was performed to detect the direct interaction between miR­15b­5p and the predicted target gene GDP dissociation inhibitor 2 (GDI2). The effects of miR­15b­5p and GDI2 on the overall survival of patients with THCA were analyzed using Kaplan­Meier analysis with log rank test. Cell Counting Kit­8 and Transwell assays were conducted to assess the impacts of miR­15b­5p and GDI2 on the proliferation and invasion of THCA cells. Reverse transcription­quantitative PCR and western blot analyses were performed to analyze the expression levels of the related miRNAs and proteins, respectively. miR­15b­5p was found to be downregulated both in THCA tissues and cells, and the low expression of miR­15b­5p was associated with the short overall survival time of patients. Moreover, the upregulation or downregulation of miR­15b­5p could inhibit or enhance the proliferation and invasion of THCA cells, respectively. miR­15b­5p reduced the protein expression levels of matrix metalloproteinase (MMP)2 and MMP9, which were related to cell invasion. Furthermore, GDI2, which was enhanced in THCA and related to the poor prognosis of patients with THCA, was identified as the target gene of miR­15b­5p and negatively regulated by miR­15b­5p. Additional experiments demonstrated that GDI2 overexpression could significantly reduce the antitumor effect of miR­15b­5p and its inhibitory action on the expression levels of MMP2 and MMP9. Thus, the results indicated a potential tumor suppressive role of miR­15b­5p in THCA, which was mainly exerted by targeting GDI2 and modulating MMP2 and MMP9. These findings will increase the understanding on the pathogenesis of THCA and provide novel candidates for THCA therapy.

Elevated AEG-1 expression in macrophages promotes hypopharyngeal cancer invasion through the STAT3-MMP-9 signaling pathway.

Macrophages play a critical role in tumor invasion and metastasis, which remain major causes of mortality in patients with hypopharyngeal cancer. Here we investigate the effect of an oncogene, AEG-1 expressed in macrophages on the invasion of hypopharyngeal cancer cells. AEG-1 is more highly expressed in macrophages of human hypopharyngeal cancer samples compared with adjacent non-tumor controls. Using matrigel invasion assay system, THP-1-derived macrophages with forced AEG-1 overexpression enhance FaDu cell invasion whereas macrophages with AEG-1 silence inhibit. Matrix metalloproteinase 9 (MMP-9), which is important in tumor invasion and metastasis through degrading extracellular matrix, is up-reulated by AEG-1 partly through NF-κB p65 in macrophages. Intriguingly, macrophage AEG-1 also induces MMP-9 up-regulated expression in FaDu cells. Furthermore, macrophage AEG-1 activates signal transducer and activator of transcription 3 (STAT3) in FaDu cells, which is responsible for macrophage AEG-1-induced an increase in MMP-9 expression and invasion of FaDu cells. This is the first to demonstrate that macrophage AEG-1 promotes tumor invasion through up-regulation of MMP-9 in both macrophages and cancer cells. Thus, the results provide evidences that macrophage AEG-1 contributes to promotion of tumor invasion, and represents as a potential target in hypopharyngeal cancer therapy.

Afatinib down-regulates MCL-1 expression through the PERK-eIF2α-ATF4 axis and leads to apoptosis in head and neck squamous cell carcinoma.

Afatinib is the second generation of irreversible inhibitor of EGFR, HER2 and HER4, which has shown encouraging phase II and III clinical outcomes in the treatment of head and neck squamous cell carcinoma (HNSCC). However, the molecular mechanism of afatinib-induced apoptosis in HNSCC is poorly understood. In the present investigation, we discovered that down-regulation of MCL-1, an anti-apoptotic member of BCL-2 family, was responsible for afatinib-triggered apoptosis. And the inactivation of AKT-mTOR signaling caused by afatinib lead to translational inhibition of MCL-1 expression. As a crucial branch of ER stress, PERK-eIF2α-ATF4 axis was also stimulated in HNSCC cells after afatinib incubation. Silencing either eIF2α or ATF4 by siRNA transfection relieved afatinib-caused suppression of AKT-mTOR activity, attenuating MCL-1 down-regulation as well as subsequent apoptosis. Collectively, the results show that afatinib hampers AKT-mTOR activation by stimulating PERK-eIF2α-ATF4 signaling pathway, giving rise to MCL-1 down-regulation mediated apoptosis in HNSCC cells. Therefore, our findings reveal the elaborate molecular network of afatinib-induced apoptosis in HNSCC, which would provide substantial theoretical underpinnings for afatinib clinical application and highlight its promising prospect in HNSCC treatment.

Association between rs12045440 Polymorphism in the CAPZB Intron and Serum TSH Concentrations in Chinese Thyroid Tumor Patients.

The aim of this study was to investigate the possible influence of different genotypes of the lead single nucleotide polymorphisms (SNPs) rs10917468 and rs12045440 in the CAPZB gene on the thyroid function in papillary thyroid carcinoma (PTC) and benign thyroid neoplasm (BN) patients. In the study, a significant association was detected between rs12045440 and serum TSH concentrations in thyroid tumor patients (p = 0.001). After the adjustment of relevant covariates, the difference between the mean serum TSH levels in different genotypes of rs12045440 was still significant in the BN group (p = 0.003) but was not significant in the PTC cases (p = 0.115). No significant association of rs10917468 with TSH levels was found. The SNP rs12045440 was associated with the serum TSH concentrations in Chinese thyroid tumor patients, especially in benign thyroid tumor cases.

Cyclic tensile strain on vocal fold fibroblasts inhibits cigarette smoke-induced inflammation: implications for Reinke edema.

OBJECTIVES: To investigate whether patients with Reinke edema are more extrovertive than patients with carcinoma and, whether cyclic tensile strain (CTS) attenuates cigarette smoke condensate (CSC)-induced inflammation in human vocal fold fibroblasts (HVFF). STUDY DESIGN: In vitro and ex vivo study. METHODS: Clinical investigation and Eysenck personality questionnaire were performed to evaluate the personality and smoking status in individuals among groups. 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5-di-phenytetrazoliumromide (MTT) assay was applied to test the viabilities of cultured HVFF exposed to CSC and/or CTS. The messenger RNA (mRNA) and protein expressions of cluster of differentiation 44 (CD44), cyclooxygenase-2 (COX-2), and matrix metalloproteinase-9 (MMP-9) in tissues from Reinke edema, paracancerous site, normal vocal fold, and in HVFF with different treatments were measured by reverse transcriptase polymerase chain reaction or western blot, respectively. RESULTS: Patients with either Reinke edema or carcinoma were moderate/heavy smokers; the extraversion score, however, was higher in Reinke edema patients than that in carcinoma patients. CD44 mRNA and protein expressions were significantly higher, whereas, COX-2 and MMP-9 expressions were significantly lower in Reinke edema tissues than those in paracancerous tissues. Treatment of HVFF with CSC led to the decrease in cell viability, the reduction in CD44 expression, but, the increase in COX-2 and MMP-9 expressions and, moreover, administration of CTS inhibited such effects of CSC on HVFF. CONCLUSIONS: Our results demonstrate that Reinke edema patients have more extrovert personality characteristics in comparison to carcinoma patients and, importantly, CTS attenuates CSC-induced inflammation in HVFF. Phonatory vibration may be a mechanism for lower expression of proinflammatory mediators in Reinke edema tissues in spite of cigarette smoke exposure.

[Prognostic factors affecting results of comprehensive treatment of hypopharyngeal carcinoma].

OBJECTIVE: To investigate the efficacy of surgery followed by adjuvant radiotherapy and the prognostic factors affecting the results of treatment in hypopharyngeal carcinoma. METHODS: A retrospective review of 149 patients with hypopharyngeal carcinoma that received surgical treatment from Jun 2003 to Jun 2010 was accomplished. In the 149 patients, the site of origin were pyriform sinus (n = 121), posterior pharyngeal wall (n = 21) and postcricoid (n = 7). According to UICC 2002 criteria, there were 3 in stage I, 15 in stage II, 29 in stage III and 102 in stage IV. Surgical methods for primary tumor were: pyriform sinus resection or posterior pharyngeal wall resection in 22 cases, partial pharyngectomy and partial laryngectomy in 29 cases, partial pharyngectomy and total laryngectomy in 67 cases, total pharyngectomy and total laryngectomy in 16 cases, total pharyngolaryngectomy and partial esophagus resection in 12 cases, and total esophagus resection in 3 cases. All the patients received elective and/or radical neck dissection. Unilateral or bilateral thyroid lobectomy was performed in 98 cases. Eighty-seven patients received intensity modulation radiated therapy (IMRT) postoperatively in the cancer center of Provincial Hospital Affiliated to Shandong University. Individualized adjustment of the radiation field was made according to the surgical condition. Forty-nine cases received radiotherapy in other hospitals (dose 50-70 Gy). Laryngeal function was restored in 51 patients (34.2%). The risk clinicopathological factors of survival and the causes of death were analyzed. RESULTS: The survival rate was calculated with Kaplan-Meier method. The overall 3- and 5- year survival rates were 47.7% and 38.7%, respectively. There were no significant differences in 3-year survival between T1-2 and T3-4 groups, N0 and N+ groups, stage I-II and III-IV groups, laryngeal function preserved and unpreserved groups. The overall 3 years survival rate of patients received surgery and adjuvant radiotherapy was higher than those just received surgery alone (χ² = 6.851, P < 0.05). The 3-year survival rate in patients treated in comprehensive treatment group has showed a good trend, although still no statistical significance (χ² = 0.176, P > 0.05). The cause of death in 86 patients, including regional lymph nodes recurrence in 25 cases (29.1%). Of them, one was stoma recurrence and 9 were retropharyngeal lymph nodes metastasis; distant metastasis in 19 cases (22.1%); local recurrence in 13 cases, local or regional recurrence with distant metastasis in 8 cases (9.3%), and second primary cancer in 6 cases (7.0%). CONCLUSIONS: The overall prognosis of hypopharyngeal carcinoma was poor and dismal. In accordance with specific conditions of surgery, active adjustment of the personalized protocol of IMRT was the key of improving the efficacy of hypopharyngeal carcinoma.

[Efficacy of retropharyngeal nodes dissection in hypopharyngeal cancer].

OBJECTIVE: To investigate the necessity and feasibility of planned dissection of the retropharyngeal lymph nodes (RPLN) in advanced hypopharyngeal cancer. METHODS: Between February 2011 and December 2012, 54 patients with advanced hypopharyngeal cancer accepted planned dissection of the RPLN during primary surgery. There were 45 cases of pyriform sinus carcinoma, 5 cases of posterior pharyngeal wall carcinoma, and 4 cases of postcricoid carcinoma. All patients underwent surgery and postoperative adjuvant radiotherapy, meanwhile bilateral neck dissection and RPLN dissection were performed. All patients received preoperative CT scanning (with contrast). The results of the radiographic assessment were compared with the postoperative pathologic findings respectively. RESULTS: RPLN were confirmed positive by pathology in 13 cases, and negative in another 43 cases. For the entire treatment group, metastasis to the RPLN was confirmed hispathologically in 12 patients (22.2%). Eight patients were pyriform sinus carcinoma, 4 were posterior pharyngeal wall carcinoma. Among them, seven patients were diagnosed as RPLN metastasis by CT imaging and another 5 patients were not confirmed. The overall accuracy for the radiologist's interpretation was 79.6%, the sensitivity was 58.3%, and the specificity was found to be 85.7%. Eleven patients were N2-3 and 6 patients were N2c. No RPLN metastasis or recurrence was found during more than one year follow-up period. CONCLUSIONS: It is not rare for the RPLN metastasis in patients with advanced hypopharyngeal carcinoma. CT imaging is not effective in determining the early presence of RPLN metastasis. The planned dissection of the RPLN is highly recommended during the initial surgery of hypopharyngeal cancer, especially in posterior pharyngeal wall carcinoma, T3-4 pyriform sinus carcinoma and staged N2-3 cases.

MG132 reverse the malignant characteristics of hypopharyngeal cancer.

In order to reverse the malignant characteristics of hypopharyngeal cancer, the proteasome inhibitor MG132 was introduced into FaDu/T cells and the mechanisms underlying its effects were investigated. The multi-drug resistance (MDR) sensitivities of FaDu/T and FaDu/T-MG132 cancer cells to several chemotherapeutics were investigated by a 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyltetrazolium bromide (MTT) assay. Apoptosis was measured by staining cells with Annexin V and propidium iodide (PI) double staining. Reverse transcription-polymerase chain reaction and western blot analysis were conducted to detect mRNA and corresponding protein levels of the MDR- and apoptosis-related genes P-glycoprotein (P-gp), caspase-3, Bcl-2 and Bax. The nuclear protein of nuclear factor κ-light-chain-enhancer of activated B cells. (NF-κB) and p53 were also investigated via western blot analysis. Compared with FaDu/T cells, the drug resistance of FaDu/T + MG132 cells to cisplatin (DDP), 5-fluorouracil (5-FU), doxorubicin (Dox) and vincristine (VCR) decreased. With increased expression of caspase-3 and Bax and decreased expression of Bcl-2, the anti-apoptotic ability markedly decreased in FaDu/T + MG132 cells. P-gp and NF-κB significantly decreased; however, p53 increased in FaDu/T + MG132 cells. These results suggested that the proteasome inhibitor MG132 reversed the malignant characteristics of FaDu/T by enhancing apoptosis and inhibiting P-gp. MG132 was also able to inhibit the nuclear translocation of NF-κB and increase the expression of p53.

[Recurrent laryngeal nerve decompression for bilateral recurrent laryngeal nerve paralyses after thyroid surgery].

OBJECTIVE: To study the feasibility and therapeutic effect of recurrent laryngeal nerve (RLN) decompression in the treatment of bilateral paralyzed RLN after thyroid surgery. METHODS: From March 2005 to June 2013, 15 cases of bilateral RLN paralyses occurring within 3 months after thyroid surgery were treated with RLN decompression. Bilateral RLN paralyses were caused by revised thyroid surgery in 8 cases and by primary thyroid surgery in 7 cases. RESULTS: RLN injuries were found in 15 cases/22 side, including RLN-cut in 9 sides and RLN-ligated in 13 sides. RLN decompression was performed in the 10 cases/13 sides of ligated RLN. Vocal cord mobility was detected through electrolaryngoscope for evaluating the postoperative functional recovery of decompressed RLN.Of 8 patients with bilateral RLN paralyses due to the ligation of RLN after previous revised thyroid surgeries, functional adduction and abduction of the vocal cord was recovered completely in 4 patients and recovered basically with a slight weak abduction in one patient after RLN decompression, and the 5 patients were decannulated in 1-4 months postoperatively. For 7 patients with bilateral RLN paralyses resulted from previous primary surgeries, unilateral or bilateral RLN decompress was performed in 2 cases and in 3 cases respectively. The mobility of the paralyzed vocal cord restored in 1-6 months after RLN decompression, besides one case with relative deficient abduction and one case with slight limited abduction and adduction, and the 5 patients were decannulated successfully. CONCLUSION: Exploration surgery could be performed as soon as possible in patients with bilateral RLN paralyses and RLN decompress is effective for the restoration of the function of the nerve.

[Association between lymphangiogenesis and clinicopathological features and prognosis in laryngeal carcinoma].

OBJECTIVE: To detect lymphangiogenesis by labeling the lymphatic endothelial marker, lymphatic vessel endothelial hyaluronan receptor-1 (LYVE-1), and study the prognostic relevance of lymphangiogenesis in laryngeal squamous carcinoma. METHODS: Clinical files and specimens of 78 patients with histologically diagnosed laryngeal carcinoma were stained with LYVE-1 as a specific lymphatic endothelial marker. The lymphatic vessel density (LVD) was measured, and the correlation between LVD and clinicopathological features of the tumor cases was analyzed. RESULTS: The mean LVD in laryngeal carcinoma (13.24 ± 5.09) was significantly higher than that in adult laryngeal papilloma (5.54 ± 3.15) and squamous dysplasia (6.76 ± 4.45, P < 0.05). The LVD of poorly differentiated tumors (15.74 ± 5.24) was significantly higher than that in the moderately differentiated tumors (13.84 ± 6.20), and the LVD in the moderately differentiated tumors was significantly higher than that in the well-differentiated tumors (11.68 ± 6.34). The LVD in stage 0 to stage II group (10.66 ± 5.70) was significantly lower than that in the stage III to IV group (17.01 ± 6.35). The lymph node metastasis group (17.25 ± 7.37) was significantly higher than non-lymph node metastasis group (8.60 ± 5.23, P < 0.05). There was no significant association between LVD and age, sex, primary site and distant metastasis. The overall survival in the patients with a LVD higher than the mean value was 33.5 month, and that of cases with a LVD lower than the mean value was 81.6 month (P < 0.05). The multivariate survival analysis showed that the clinical stage and LVD were independent prognostic factors of laryngeal cancer. CONCLUSIONS: The LYVE-1 staining histochemistry demonstrates that the lymphangiogenesis occurrs mainly at the edge of the tumors, and lymphangiogenesis plays an important role in the carcinogenesis, cancer progression and lymph node metastasis in laryngeal cancer. LVD may be an independent indicator of poor prognosis of laryngeal cancer.

[Vocal fold augmentation by injection of autologous fascia and fat].

OBJECTIVE: To evaluate the effect of combination of autologous fascia and fat injection into vocal fold for the treatment of patients with unilateral vocal fold paralysis and to observe the long-term effectiveness of this procedure. METHODS: A total of 26 unilateral vocal fold paralysis patients underwent vocal fold injection under general anesthesia, meanwhile, the mucosa of the injected point was sutured through laryngoscope under direct vision. There were 6 patients underwent autologous fat injection into vocal fold (group A), and 20 patients underwent autologous anterior rectus sheath fascia and fat injection (group B). Therapeutic efficacy were evaluated by videostroboscopy, voice-related parameters analysis and voice evaluation before and after treatment. Clinical analysis of this procedure was retrospectively performed in this serial of patients. RESULTS: All patients were followed up for 24 months. On the third day after operation, there was an acute inflammatory reaction induced by the graft. This reaction disappeared three months later. In all 20 cases, videolaryngostroboscopy showed significant improvement of the glottic closure, the improvement in acoustical parameters was statistically significant (P < 0.01). Perceptual evaluation of GRBAS scale showed significant improvement of phonatory function on G, B, A scale. The results remained stable 6 - 24 months after operation and were not changed by the length of follow-up. And in the 6 cases, videolaryngostroboscopy showed significant improvement of the glottic closure at 3 months compared with preoperative observation, a little spindle-shaped disclosure. The improvement in acoustical parameters was significant statistically at 3, 6 and 24 months (P < 0.05 or < 0.01), the voice quality decreased significantly at 6 and 24 months compared with 3 months (P < 0.05 or < 0.01). The significant differences were not observed between 6 and 24 months (P > 0.05). No complications were observed in all patients perioperatively or during the follow-up period. Voice-related parameters jitter, normalized noise energy and maximum phonation time showed significant differences between Group A and Group B on 24 months (P < 0.05 or < 0.01). CONCLUSION: The combination of autologous fascia and fat vocal fold injection is an effective procedure for the treatment of unilateral vocal fold paralysis, and the stable results can be achieved during the follow-up period for 24 months.

[Tubed pectoralis major myocutaneous flap for reconstruction of circumference pharyngoesophageal defects].

OBJECTIVE: To investigate the feasibility and efficacy of tubed pectoralis major myocutaneous flap in the reconstruction of circumferential defects following resection for locally advanced hypopharyngeal and cervical esophageal carcinoma. METHODS: From Dec. 2004 to Oct. 2008, 30 patients underwent immediate reconstruction by tubed pectoralis major myocutaneous flap for circumferential defects following resection of primary tumours. Among them, 22 were hypopharyngeal carcinoma, 7 were cervical esophageal carcinoma and one was recurrent laryngeal carcinoma involved the hypopharyngeal lumen. Five of 30 patients had received previous radiotherapy and three had failed in the previous surgical procedure. In this series, 12 patients had total pharyngolaryngectomy and 18 had total pharyngolaryngectomy and partial cervical esophagectomy. RESULTS: Postoperative pharyngocutaneous fistula formation occurred in 4 patients, 2 of them with previous radiotherapy and 2 with diabetes, and the fistulae healed later. Two patients developed anastomotic strictures at the upper junction, but they had good responses to dilatation treatment and had satisfactory oral intake. The postoperative follow-up time ranged from 8 to 56 months. Median follow-up was 18 months. One-year survival rate was 71.4% and three-year survival rate was 42.5%. CONCLUSIONS: The tubed pectoralis major myocutaneous flap is a reliable procedure to reconstruct hypopharyngeal circumferential defects following resection of advanced hypopharyngeal and cervical esophageal carcinoma. This method may be the optimal choice for the reconstruction of hypopharyngeal circumferential defects following resection of recurrent carcinoma. The incidence of fistula and stenosis could be kept at an acceptable level.

[Study on the treatment of nasal polyposis with bleomycin A5 local injection].

OBJECTIVE: To study the treatment mechanism of nasal polyposis by locally injecting Bleomycin A5. METHOD: The specimens from nineteen cases with nasal polyposis obtained before and after treatment with Bleomycin A5 were studied with immunohistochemical technique and terminal deoxynucleotidyl transferase mediated dUTP nick end labeling (TUNEL). RESULT: The apoptosis index (AI) of eosinophil was (20.53 +/- 7.66) % before treatment and (44.47 +/- 8.97) % after treatment. There was significantly difference between them (P < 0.01). The rate of TGF-beta1 positive expression in eosinophil after treatment (74.74 +/- 5.22) % was significantly lower than that before treatment (85.18 +/- 8.07) % (P < 0.05). The expression of TGF-beta1 in matrix was also decreased (P < 0.05). CONCLUSION: Bleomycin A5 could cure nasal polyposis by promoting eosinophil apoptosis and reducing the expression of TGF-beta1.

[Eosinophil apoptosis in nasal polyposis tissue after bleomycin A5 local injection].

OBJECTIVE: To study the expression of eosinophil in nasal polyposis tissue after Bleomycin A5 local injection. METHOD: Nineteen cases nasal polyposis specimen obtained before and after treatment with Bleomycin A5 were studied with terminal deoxynucleotidyl transferasemediated dUTP nick endlabeling (TUNEL). RESULT: The number of eosinophil in nasal polyposis specimen before treatment is significantly higher than that after treatment (P<0.01) and so to normal inferior turbinate concha mucosa (P<0.01). The apoptosis index (AI) of eosinophil after treatment is significantly higher than that before treatment (P<0.01). CONCLUSION: Eosinophil is the main infiltration cell in nasal polyposis tissue. Bleomycin A5 could cure nasal polyposis by promoting eosinophil apoptosis.