Acta oto-laryngologica. Supplementum最新文献

{"title":"A standardized database management of middle ear surgery in Korea.","authors":"Hyung-Jong Kim","doi":"10.1080/03655230701624871","DOIUrl":"https://doi.org/10.1080/03655230701624871","url":null,"abstract":"<p><strong>Conclusion: </strong>The classification and hearing result reporting system of middle ear surgery provide a set of standard that otologic surgeons should comply with when they investigate the efficacy of procedures or report the post-operative results of middle ear surgery. Keeping up with this system will, in turn, facilitate and activate the evidence-based clinical research they would ask for.</p><p><strong>Objectives: </strong>The aims of the project were to establish the standardized classification nomenclature, to propose a guideline for the post-operative result reporting system, and to develop a database management program for middle ear surgery.</p><p><strong>Methods: </strong>Nine otologic surgeons from seven university hospitals in Korea carried out a field survey on the nation-wide status of middle ear surgery and its records, and also collected the information regarding international classification and result reporting system from 2001 through 2004. To make a consensus, it also underwent a process of public audit and, a questionnaire investigation, as well.</p><p><strong>Results: </strong>The classification of surgery consisted of four kinds of procedures of mastoidectomy, tympanoplasty, extraneous procedures, and concurrent procedures. Post-operative hearing result reporting consisted of basic requirement and reporting guidelines of hearing success. The basic requirements stated minimum follow up duration, and computing formulae of pure tone average (PTA) and post-operative air bone gap (ABG). The reporting guidelines included criteria of hearing success (Post-operative ABG <or= 20 dB, hearing gain >or=15 dB, or hearing level <or=30 dB), post-operative ABG grading of excellent, good, no or poor improvement, and comparisons of hearing improvement among the groups. Next, a database management program was developed using the standardized classification and result reporting system. Structure of database is composed of 144 fields including patient information/preoperative findings (45 fields), operative findings (36 fields), operative procedures (29 fields), and post-operative follow up (23 fields).</p>","PeriodicalId":7027,"journal":{"name":"Acta oto-laryngologica. Supplementum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03655230701624871","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40984487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of packing on the postoperative hearing after middle ear surgery.","authors":"Yang-Sun Cho,&nbsp;Hyun-Seok Lee,&nbsp;Sung Hwa Hong,&nbsp;Won-Ho Chung,&nbsp;Jin-Young Min,&nbsp;Soo Jin Hwang","doi":"10.1080/03655230701624897","DOIUrl":"https://doi.org/10.1080/03655230701624897","url":null,"abstract":"<p><strong>Conclusion: </strong>The changes of hearing by packing after middle ear surgery should be anticipated and carefully interpreted.</p><p><strong>Objectives: </strong>To evaluate the amount and patterns of hearing loss resulting from packing in middle ear cavity (MEC) and external auditory canal (EAC) after middle ear surgery.</p><p><strong>Method: </strong>We obtained pure tone thresholds by bone (BC) and air conduction (AC) up to 12 weeks after middle ear surgery in 17 patients who had minimal middle ear pathology. To observe the effects of packing only in the EAC as in cases of explorative tympanotomy or stapes surgery, BC and AC threshold were obtained after packing only in the EAC in 18 volunteers. The changes of BC and AC thresholds in terms of pure tone average (PTA) and high frequency PTA were analyzed.</p><p><strong>Results: </strong>PTA by AC increased significantly by a maximal value of 38.7 dB at the second postoperative day, by 35.0 dB at 1 week after middle ear surgery. PTA by BC also increased maximally at the second postoperative day by 4.8 dB. The elevation of BC threshold at high frequencies (2, 3, 4 kHz) was more pronounced. Packing of EAC without MEC packing resulted in elevation of AC threshold by 43.0 dB, with similar patterns of BC threshold changes as MEC and EAC packing.</p>","PeriodicalId":7027,"journal":{"name":"Acta oto-laryngologica. Supplementum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03655230701624897","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40984489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nasal hump removal in Asians.","authors":"Hong-Ryul Jin,&nbsp;Tae-Bin Won","doi":"10.1080/03655230701624947","DOIUrl":"https://doi.org/10.1080/03655230701624947","url":null,"abstract":"<p><p>Conclusion. When performing nasal hump reduction in Asians, the amount of hump resection should be tailored based on the predicted amount of dorsal augmentation and tip projection needed. Common complications of hump removal can be prevented by conservative hump removal and efficient use of spreader graft or camouflage cartilage grafts. Objectives. The authors present surgical features and results of nasal hump reduction in 51 Asian patients. Subjects and methods. Fifty-one consecutive patients who underwent nasal hump reduction were analyzed retrospectively. Characteristics of the nose accompanying the hump, approaches and techniques used, combined procedures, results and complications were evaluated. Preoperative and postoperative standardized photographs of the face were evaluated to judge objectively the aesthetic outcomes of the surgery. Results. The most frequent aesthetic characteristic accompanying the hump nose was a relatively low nasal dorsum and tip projection compared to the ideal Asian aesthetic norms. An endonasal approach was used for 22 patients (43%) and an external approach for 29 patients (57%). En bloc resection of the bony and cartilaginous hump, followed by rasping was the most commonly used methods for hump resection. Combined procedures included septoplasty (89%), dorsal augmentation with cartilage graft (73%), lateral osteotomy (69%), nasal tip surgery (49%) and spreader graft (39%). Objective evaluation showed complete correction of the hump in 70%, slight under-correction in 26%, and persistent hump (although less than preoperative) in 4%. Complications such as \"inverted V\" deformity, saddle nose, and nasal obstruction were not encountered.</p>","PeriodicalId":7027,"journal":{"name":"Acta oto-laryngologica. Supplementum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03655230701624947","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40984494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insulin-like growth factor binding protein (IGFBP)-mediated hair cell survival on the mouse utricle exposed to neomycin: the roles of IGFBP-4 and IGFBP-5.","authors":"Ji Yeong Park,&nbsp;Yong Ho Park,&nbsp;Dong Hoon Shin,&nbsp;Seung Ha Oh","doi":"10.1080/03655230701624822","DOIUrl":"https://doi.org/10.1080/03655230701624822","url":null,"abstract":"<p><strong>Conclusion: </strong>This study suggests for the first time that 1) IGF-I, IGFBP-4, and -5 alone and IGF-I+IGFBP-5 mixture stimulated hair cell survival and prevented neomycin-induced hair cell loss in the sensory epithelial culture of mouse utricles, 2) When administered together, IGFBP-4 diminished the effect of IGF-I, 3) In P3-5 mice utricle, IGF-I, IGFBP-4, and IGFBP-5 are expressed in the cytoplasm of hair cells. And Insulin/IGF-I Receptor is expressed in the nucleus of hair cells.</p><p><strong>Objectives: </strong>Several growth factors have been demonstrated to protect auditory sensory cells in vitro and in vivo from aminoglycoside toxicity. IGF-I is one of the most well-known mitogenic and protective substance working in the inner ear. However, there are no reports available regarding the function of IGFBPs in the inner ear. In the present study, the effects of IGFBP-4 and -5 on hair cell survival were investigated in mouse utriclular organ cultures.</p><p><strong>Materials and methods: </strong>The amount of cellular damage and cell viability in vestibular organs were assessed by counting hair cells stained with a rhodamine-phalloidin probe. The expressions of IGFBP-4, IGFBP-5, IGF-IR, and IGF-I were localized by immunohistochemistry.</p><p><strong>Results: </strong>When treated with IGF-I, IGFBP-4, or IGFBP-5 for 24 h, explant culture showed hair cell survival rates of 136+/-18%, 140+/-15%, and 133+/-6%, respectively, compared to controls. Neomycin (1 mM) induced hair cell loss resulted in 45+/-17% of hair cell survival. However, pre-treatment of IGF-I, IGFBP-4, or -5 before neomycin insult showed survival rates of 113+/-14%, 98+/-8%, and 73+/-24%, respectively. Similar to IGF-I, IGFBP-4 and IGFBP-5 were significantly protective. IGFBP-4 and -5 immunoreactivities were observed in the cytoplasm of normal explanted vestibular hair cells as well as in the P3 mouse utricular hair cells in vivo.</p>","PeriodicalId":7027,"journal":{"name":"Acta oto-laryngologica. Supplementum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03655230701624822","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40984557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Endoscopic intranasal reduction of the orbit in isolated blowout fractures.","authors":"Sea-Yuong Jeon,&nbsp;Jae Hwan Kwon,&nbsp;Jin Pyeong Kim,&nbsp;Seong Ki Ahn,&nbsp;Jung Je Park,&nbsp;Dong Gu Hur,&nbsp;Seong Wook Seo","doi":"10.1080/03655230701624962","DOIUrl":"https://doi.org/10.1080/03655230701624962","url":null,"abstract":"<p><strong>Conclusion: </strong>Endoscopic intranasal reduction of the orbital floor with a detachable temporary balloon, or of the medial orbital wall with a silastic sheet and Merocel packing, provided good functional results and definite advantages. We suggest that these techniques are another surgical alternative for isolated orbital floor or medial wall blowout fractures that do not accompany any associated fractures of the orbital rim.</p><p><strong>Objectives: </strong>Extended applications of endoscopic sinus surgery have reported endoscopic intranasal reduction or reconstruction of the orbital wall with good functional and cosmetic results. We present our experience with endoscopic intranasal reduction of the orbit in isolated orbital floor and/or medial wall blowout fractures, treated by reduction of the orbital floor with a detachable temporary balloon, or of the medial orbital wall with a silastic sheet and Merocel packing.</p><p><strong>Subjects and methods: </strong>Floor reduction: After creating a wide middle meatal antrostomy, herniated orbital contents and fracture-displaced floor are mobilized and reduced. The orbital floor is supported by a saline filled balloon, which is connected with an infant feeding catheter and passed through the middle meatal antrostoma. After confirming the reduction of the orbital floor by postoperative CT, the catheter is ligated and cut in short to keep it in the nasal cavity. Medial wall reduction: After completing an intranasal ethmoidectomy, herniated orbital contents and fractured lamina papyracea are mobilized and reduced. The shape of the medial orbital wall is fixed by a silastic sheet and Merocel packing saturated with an antibiotic solution. Surgery was performed when the eye function could be accurately assessed, usually at 7 to 10 days following the injury. Temporary supporting of the orbital wall with a detachable temporary balloon, or a silastic sheet and Merocel packing was removed 4 weeks after surgery in the out-patient clinic.</p><p><strong>Results: </strong>We have experienced 40 cases of endoscopic intranasal reduction of the orbit in blowout fractures. CT scan confirmed isolated orbital floor fracture in 11 patients, isolated medial wall fracture in 17 patients, and combined fractures of the orbital floor and the medial wall in 12 patients. Twenty five patients had diplopia, 20 patients had limitation of eye movement, and 14 patients developed enophthalmos. Thirty three of the 40 patients recovered completely without any residual eye symptoms or complications.</p>","PeriodicalId":7027,"journal":{"name":"Acta oto-laryngologica. Supplementum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03655230701624962","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40984440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Primary and secondary fungal infections of the paranasal sinuses: clinical features and treatment outcomes.","authors":"Doo Hee Han,&nbsp;Soo-Youn An,&nbsp;Si Whan Kim,&nbsp;Dong-Young Kim,&nbsp;Chae-Seo Rhee,&nbsp;Chul Hee Lee,&nbsp;Yang-Gi Min","doi":"10.1080/03655230701624913","DOIUrl":"https://doi.org/10.1080/03655230701624913","url":null,"abstract":"<p><strong>Conclusion: </strong>In a retrospective study of 239 cases of fungal sinusitis, noninvasive paranasal sinus aspergillosis was most common and successfully treated by endoscopic sinus surgery (ESS) with postoperative sinus irrigation. For the treatment of fungal sinusitis, ESS with or without antifungal agents and control of predisposing factors for secondary cases are recommended.</p><p><strong>Objective: </strong>The aim of this study was to investigate the clinical characteristics of fungal sinusitis and evaluate the treatment outcomes of primary and secondary fungal infections of the paranasal sinuses.</p><p><strong>Materials and methods: </strong>Two hundred thirty-nine cases of fungal infection of the paranasal sinuses seen between January 1997 and December 2006 were retrospectively analyzed by reviewing their medical records. There were 200 cases of primary fungal infection and 39 cases of secondary fungal infection.</p><p><strong>Results: </strong>The symptoms of chronic rhinosinusitis such as nasal obstruction, purulent rhinorrhea, and postnasal drip were commonly present in both primary and secondary infections, and the sphenoid sinus was commonly involved in secondary infection. The radiological findings in fungal sinusitis included haziness, calcification, and bone destruction of the involved sinuses. CT scans in 80% of the primary and 69% of the secondary cases revealed calcific densities in a paranasal soft tissue mass. Twenty-eight of 38 cases which had MR showed decreased signal intensities on T1-weighted images and markedly reduced signal intensities surrounded by bright signal on T2-weighted images. In secondary cases, the most common concomitant disease was diabetes mellitus. All patients received surgery including biopsy, ESS, and Caldwell-Luc's operation. Mucosal hypertrophy with fungus ball, which was the most common finding in both types, was found in 124 cases (62%) with primary and in 26 cases (67%) with secondary cases, and aspergillosis was most common, followed by unidentifiable colony, and mucormycosis. Eleven cases received amphotericin-B postoperatively. Two hundred thirty-eight cases showed no recurrence during the mean follow-up period of 11 months.</p>","PeriodicalId":7027,"journal":{"name":"Acta oto-laryngologica. Supplementum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03655230701624913","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40984491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Expression of uteroglobin in a murine model of allergic rhinitis.","authors":"Tae-Bin Won,&nbsp;Song-Hua Quan,&nbsp;Chae-Seo Rhee,&nbsp;Yang-Gi Min,&nbsp;Chul Hee Lee","doi":"10.1080/03655230701624921","DOIUrl":"https://doi.org/10.1080/03655230701624921","url":null,"abstract":"<p><strong>Conclusion: </strong>We observed for the first time the expression of Uteroglobin (UGB) in the nasal mucosa of mice. The results of our study suggest that UGB may play an important role in the regulation of inflammation in allergic rhinitis (AR) as well as in the lower airway allergic inflammations.</p><p><strong>Objectives: </strong>Uteroglobin is a protein secreted by epithelial lining of organs communicating with the external environment. Reports of its immunomodulatory effects in allergic disease have been made, but the true physiological role still remains to be elucidated. In this study we tried to observe the expression of UGB in the nasal mucosa of mice and determine its role in AR.</p><p><strong>Materials and methods: </strong>Thirty BALB-c mice at 3 weeks of age (10 mice/group) were sensitized systemically by intraperitoneal ovalbumin injection and locally by ovalbumin inhalation. Control group were sensitized with PBS. Treatment group had intraperitoneal dexamethasone injection 1 hour before the initial sensitization while control and AR group were injected with PBS. Symptom scores, eosinophil counts, immunohistochemical staining as well as UGB mRNA expression in the nasal mucosa and lung tissue were analyzed.</p><p><strong>Results: </strong>The symptom scores and eosinophil counts between control and treatment group was significantly different from the AR group (P<0.01). On immunohistochemical staining, UGB was localized in the epithelium and submucosal gland of the nasal mucosa as well as in the epithelium of respiratory bronchioles. UGB mRNA expression of the nasal mucosa and lung tissue was decreased in the AR group compared to the control group (P=0.022). In the treatment group UGB expression was increased compared to the AR group (P=0.016). The results of IHC and mRNA expression in the lung tissue correlated with the results in the nasal mucosa.</p>","PeriodicalId":7027,"journal":{"name":"Acta oto-laryngologica. Supplementum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03655230701624921","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40984492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prevalence of lower airway diseases in patients with chronic rhinosinusitis.","authors":"Hyo Yeol Kim,&nbsp;Yoon Kyoung So,&nbsp;Hun-Jong Dhong,&nbsp;Seung Kyu Chung,&nbsp;Dong-Chull Choi,&nbsp;Nam-Hee Kwon,&nbsp;Mi-Jung Oh","doi":"10.1080/03655230701624988","DOIUrl":"https://doi.org/10.1080/03655230701624988","url":null,"abstract":"<p><strong>Conclusion: </strong>There is high prevalence of lower airway diseases in patients with chronic rhinosinusitis and frequently co-existing lower airway diseases have not been diagnosed before.</p><p><strong>Objectives: </strong>To examine the prevalence of lower airway diseases in patients with chronic rhinosinusitis.</p><p><strong>Methods: </strong>Seventy-three consecutive patients with chronic rhinosinusitis were enrolled in this prospective study. With routine physical examination, spirometry and methacholine bronchial provocation test were performed and chest simple radiograph or chest computed tomography was taken.</p><p><strong>Results: </strong>Thirty patients (41.1%) had lower airway diseases. There were 8 patients with asthma, 5 with asymptomatic bronchial hyperresponsiveness, 11 with small airway disease, 2 with chronic obstructive pulmonary disease and 4 with bronchiectasis. Of these 30 patients, 21 patients (70.0%) were first diagnosed as having lower airway diseases in this study.</p>","PeriodicalId":7027,"journal":{"name":"Acta oto-laryngologica. Supplementum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03655230701624988","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40984441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Implication of vibration induced nystagmus in Meniere's disease.","authors":"Sung Kwang Hong,&nbsp;Ja-Won Koo,&nbsp;Ji Soo Kim,&nbsp;Min-Hyun Park","doi":"10.1080/03655230701625019","DOIUrl":"https://doi.org/10.1080/03655230701625019","url":null,"abstract":"<p><strong>Conclusion: </strong>The incidence of ipsilesional beating vibration induced nystagmus (VIN) is significantly higher in Meniere's disease (MD) with lower canal paresis (CP) group on caloric test and the intensity of VIN shows significant positive correlation with CP. Considering previous reports showing predominant loss of type II hair cells in MD and discrepancy of the results between caloric test and head thrust test in MD patients, VIN may provide valuable information regarding the functional reservoir of vestibular type II hair cells in MD.</p><p><strong>Objectives: </strong>Clinical presentation of MD is dynamic and nystagmus changes phase to phase, which is attributed to the recovery process in addition to central compensation after active vertigo attack of MD. VIN has been shown to reflect the side difference of peripheral vestibular excitability and is well correlated with the severity of caloric weakness in vestibular neuritis. Aim of this study was to compare the intensity and the direction of VIN with CP in unilateral MD.</p><p><strong>Materials and methods: </strong>52 patients with unilateral definite MD on AAO-HNS guideline (1995) were included. Auditory and vestibular function tests including caloric test, post-head shaking nystagmus (HSN) and VIN were evaluated during symptom free period and cases with spontaneous nystagmus were excluded. Vibratory stimuli (100 Hz) were applied to either mastoid alternatively. Eye movement was recorded using video nystagmography system. The horizontal component of VIN was compared with HSN and caloric test.</p><p><strong>Results: </strong>37 patients (71%) showed VIN. VIN to ipsilesional side was in 10 and to contralesional side in 27. In patients with CP over 43% (N =23), 2 beated to ipsilesional side, 17 to contralesional side and 4 showed no VIN. In patients with CP of less than 43% (N =29), 8 beated to ipsilesional side, 10 to contralesional side and 11 showed no VIN (p<0.05). 33 patients (63%) showed HSN and 24 patients of them (72%) showed contralesional nystagmus. The intensity of VIN shows significant positive correlation with the degree of CP on caloric test (Spearman's rho =0.340, p<0.05).</p>","PeriodicalId":7027,"journal":{"name":"Acta oto-laryngologica. Supplementum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03655230701625019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40984444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"KCNQ1/KCNE1 K+ channel and P2Y4 receptor are co-expressed from the time of birth in the apical membrane of rat strial marginal cells.","authors":"Dong Gu Hur,&nbsp;Jun Ho Lee,&nbsp;Seung-Ha Oh,&nbsp;Young Ho Kim,&nbsp;Jin Hee Lee,&nbsp;Dong Hoon Shin,&nbsp;Sun O Chang,&nbsp;Chong-Sun Kim","doi":"10.1080/03655230701624830","DOIUrl":"https://doi.org/10.1080/03655230701624830","url":null,"abstract":"<p><strong>Conclusion: </strong>KCNQ1/KCNE1 K(+) channels and P2Y(4) receptors are expressed in the apical membrane of rat strial marginal cells from postnatal day 1 (P1) and maintained throughout development.</p><p><strong>Objectives: </strong>The purpose of the present study was to investigate the developmental expression of KCNQ1/KCNE1 K(+) channel and of P2Y(4), which is an important metabotropic regulator of KCNQ1/KCNE1 K(+) channel in strial marginal cells.</p><p><strong>Materials and methods: </strong>Sprague-Dawley rats at different stages of development (P1, P3, P5, P7, P14, and P21) were studied. The spiral ligament with the stria vascularis was detached from the cartilaginous or bony cochlea and prepared for a voltage-sensitive vibrating probe and immunohistochemistry.</p><p><strong>Results: </strong>Chromanol 293B, a blocker of KCNQ1/KCNE1 K(+) channel, inhibited short-circuit currents (I ( sc )) from P1 to P21. Similarly, I ( sc ) were found to be decreased by uridine 5'-triphosphate at all ages. The antagonist profiles indicated that the apical P2Y receptor is P2Y(4) subtype. KCNQ1, KCNE1, and P2Y(4) were immunolocalized in the apical region of stria vascularis at P1.</p>","PeriodicalId":7027,"journal":{"name":"Acta oto-laryngologica. Supplementum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/03655230701624830","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40984558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}