Expression of T-Type Voltage-Gated Calcium Channel in the Cilia of Human Nasal Epithelial Cells.

INTRODUCTION: The mucociliary transport function of the airway epithelium is largely dependent on ciliary beating. The control signal of ciliary beating is thought to be intracellular Ca2+. We herein investigated the expression of T-type voltage-gated calcium channel (VGCC), a generator of intracellular Ca2+ oscillation, in the human nasal mucosa. METHODS: The inferior turbinate was collected from patients with chronic hypertrophic rhinitis. The expression of T-type VGCC α1 subunits was examined by immunohistochemistry, transmission immunoelectron microscopy, Western blot, and real-time reverse transcription-polymerase chain reaction (RT-PCR). Participation of T-type VGCC in the ciliary beat regulation was examined by pharmacological inhibition tests using specific blockers of T-type VGCC in ex vivo measurements of the ciliary beat frequency (CBF) and ATP release and in intracellular Ca2+ imaging of isolated ciliated cells. RESULTS: Immunohistochemical staining showed the expressions of T-type VGCC α1 subunits, Cav3.1 and Cav3.3, on the surface of the epithelial cells. At the ultrastructural level, immunoreactivity for Cav3.1 was localized on the surface of the cilia, and that for Cav3.3 was localized in the cilia and at the base of the cilia. The existence of Cav3.1 and Cav3.3 was confirmed at the protein level by Western blot and at the transcriptional level by real-time RT-PCR. Specific blockers of T-type VGCC, mibefradil and NNC 55-0396, significantly inhibited CBF. These blockers also inhibited a CBF increase induced by 8-bromo-cAMP/8-bromo-cGMP and significantly lowered the intracellular Ca2+ level of isolated ciliated cells in a time-dependent manner. On the other hand, the ATP release from the nasal mucosa was not changed by mibefradil or NNC 55-0396. CONCLUSION: These results indicate that T-type VGCC α1 subunits, Cav3.1 and Cav3.3, exist at the cilia of the nasal epithelial cells and participate in the regulation of ciliary beating and that these channels act downstream of cAMP/cGMP.

Frequency-specific prediction model of hearing outcomes in patients with idiopathic sudden sensorineural hearing loss.

PURPOSE: The hearing outcome of idiopathic sudden sensorineural hearing loss (ISSNHL) is hard to predict. We herein constructed a multiple regression model for hearing outcomes in each frequency separately in an attempt to achieve practical prediction in ISSNHL. METHODS: We enrolled 235 consecutive in-patients with ISSNHL who were treated in our department from 2015 to 2020 (average hearing level at 250-4000 Hz ≥ 40 dB; time from onset to treatment ≤ 14 days; 126 males/109 females; age range 17-87 years (average 61.0 years)). All patients received systemic prednisolone administration combined with intratympanic dexamethasone injection. The pure-tone hearing threshold of 125-8000 Hz was measured at every octave before (HLpre) and after (HLpost) treatment. A multiple regression model was constructed for HLpost (dependent variable) using five explanatory variables (age, days from onset to treatment, presence of vertigo, HLpre, and hearing level of the contralateral ear). RESULTS: The multiple correlation coefficient increased as the frequency increased. Strong correlations were seen in high frequencies, with multiple correlation coefficients of 0.784/0.830 for 4000/8000 Hz. The width of the 70% prediction interval was narrower for 4000/8000 Hz (± 18.2/16.3 dB) than for low to mid-frequencies. Among the five explanatory variables, HLpre showed the largest partial correlation coefficient for any frequency. The partial correlation coefficient for HLpre increased as the frequency increased, which may partially explain the high multiple correlation coefficients for high frequencies. CONCLUSION: The present model would be of practical use for predicting hearing outcomes in high frequencies in patients with ISSNHL.

Calmodulin Regulates Ciliary Beats in the Human Nasal Mucosa Through Adenylate/Guanylate Cyclases and Protein Kinases A/G.

BACKGROUND: The ciliary beat of the airway epithelium, including the sinonasal epithelium, has a significant role in frontline defense and is thought to be controlled by the level of intracellular Ca2+. Involvement of calmodulin and adenylate/guanylate cyclases in the regulation of ciliary beats has been reported, and here we investigated the interrelation between these components of the ciliary beat regulatory pathway. METHODS: The inferior turbinates were collected from 29 patients with chronic hypertrophic rhinitis/rhinosinusitis during endoscopic sinonasal surgery. The turbinate mucosa was cut into thin strips, and mucociliary movement was observed under a phase-contrast light microscope equipped with a high-speed digital video camera. RESULTS: The ciliary beat frequency (CBF) was significantly increased by stimulation with 100 µM CALP3 (calmodulin agonist), which was completely suppressed by adding 100 µM SQ22536 (adenylate cyclase inhibitor) and 10 µM ODQ (guanylate cyclase inhibitor) together and by adding 1 µM KT5720 (protein kinase A inhibitor) and 1 µM KT5823 (protein kinase G inhibitor) together. The CBF was significantly increased by stimulation with 10 µM forskolin (adenylate cyclase activator) and 10 µM BAY41-2272 (guanylate cyclase activator) and by stimulation with 100 µM 8-bromo-cAMP (cAMP analog) and 100 µM 8-bromo-cGMP (cGMP analog), which was not changed by adding 1 µM calmidazolium (calmodulin antagonist). CONCLUSIONS: These results confirmed that the regulatory pathway of ciliary beats in the human nasal mucosa involves calmodulin, adenylate/guanylate cyclases, and protein kinases A/G and indicate that adenylate/guanylate cyclases and protein kinases A/G act downstream of calmodulin, but not vice versa, and that these cyclases relay calmodulin signaling.

Expression of Cl- channels/transporters in nasal polyps.

PURPOSE: Nasal polyp formation is a common sequela of prolonged chronic rhinosinusitis, but the mechanism underlying this disease state is still controversial. We compared the expressions of Cl- channels/transporters in nasal polyps with those in inferior turbinates to explore whether a deficiency in Cl- transport may participate in the pathophysiology of nasal polyp formation as in patients with cystic fibrosis. METHODS: Nasal polyps and inferior turbinates were collected from 12 chronic rhinosinusitis patients with hypertrophic rhinitis and/or nasal polyps. Expressions of cystic fibrosis transmembrane conductance regulator (CFTR), pendrin, Na+-K+-2Cl- cotransporter 1 (NKCC1), SLC26A3, TMEM16A and anion exchanger 2 (AE2) were examined by fluorescence immunohistochemistry using Alexa Fluor 488. RESULTS: CFTR was weakly expressed on the epithelial surface of the turbinate mucosa whereas the nasal polyps showed almost no fluorescence. Pendrin was mainly expressed on the epithelial surface in both tissues. The fluorescence was moderate in the nasal polyps and strong in the turbinate mucosa. For NKCC1, moderate fluorescence was observed throughout the entire epithelial layer of the nasal polyps, but the turbinate mucosa exhibited almost no fluorescence. On the other hand, no fluorescence for SLC26A3, TMEM16A or AE2 was seen in either tissue. CONCLUSION: These results suggest that CFTR, pendrin and NKCC1 may participate in the pathogenesis of nasal mucosal edema and play roles in the mechanism of nasal polyp formation.

Decreased ciliary beat responsiveness to acetylcholine in the nasal polyp epithelium.

OBJECTIVE: We investigated the difference in ciliary beat responsiveness to acetylcholine in ex vivo and the difference in the expressions of associated molecules (M1/M3 muscarinic receptors, pannexin-1 and P2X7 purinergic receptor) between the nasal polyp and turbinate mucosa. STUDY DESIGN: Laboratorial study. PARTICIPANTS: Nasal polyp and inferior turbinate were collected from patients with hypertrophic rhinitis and/or nasal polyp during endoscopic sinonasal surgery. MAIN OUTCOME MEASURES: The mucosa was cut into thin strips, and ciliary movement was observed under a phase-contrast light microscope equipped with a high-speed digital video camera. The samples were also examined by scanning electron microscopy, fluorescence immunohistochemistry, and quantitative reverse transcription-polymerase chain reaction. RESULTS: Cilia were well preserved in both tissues at the ultrastructural level. The baseline ciliary beat frequency (CBF) was not different between the two tissues. The CBF of the turbinate was significantly increased by stimulation with acetylcholine (P < 0.001), but that of the polyp was not. The ratio of the acetylcholine-stimulated CBF to the baseline CBF was significantly lower in the polyp than in the turbinate (P < 0.001). Immunohistochemical study revealed that immunoreactivities for M3, pannexin-1 and P2X7 were weaker in the polyp than in the turbinate. The mRNA expressions of M1, M3 and P2X7 were significantly lower and that of pannexin-1 tended to be lower in the polyp than in the turbinate. CONCLUSIONS: These results indicate that ciliary beat responsiveness to acetylcholine is decreased in the nasal polyp. This may be explained by the decreased expressions of M3, P2X7 and probably pannexin-1 in this tissue.

Hearing outcome does not depend on the interval of intratympanic steroid administration in idiopathic sudden sensorineural hearing loss.

We studied the effect of intratympanic steroid administration with different intervals on hearing outcomes in patients with idiopathic sudden sensorineural hearing loss (ISSNHL). The subjects were 197 consecutive patients (197 ears) with ISSNHL (hearing level ≥40 dB, interval between onset and treatment ≤30 days). They received systemic administration of prednisolone (100 mg followed by tapered doses) combined with intratympanic injection of dexamethasone (4 mg/ml). Intratympanic injection was performed once a week for 4 weeks in 105 patients (long-interval group), or 4 times in 1 week in 92 patients (short-interval group). The hearing outcomes were evaluated at two points of time: 1 week from the start of treatment, and 1-2 months after the completion of treatment when the hearing level reached a plateau. There was no significant difference in the cure rate, marked-recovery rate, recovery rate, hearing gain, hearing level, or percent hearing improvement between the long- and short-interval groups at either point of time. Multiple regression analysis also showed that the final hearing level did not depend on the interval of intratympanic steroid injection. These results indicate that the hearing outcome of ISSNHL does not improve even if the interval of intratympanic injection is shortened. This implies that a lower total number of intratympanic steroid injections may be as effective as the present protocol.

Treatment outcome of ion beam therapy in eight patients with head and neck cancers.

Ion beam therapy has enabled us to treat formerly untreatable malignant tumors. The aim of the present study was to investigate the long-term follow-up course of patients with head and neck cancers who received ion beam therapy. The subjects were 8 patients (3 men and 5 women aged 43-78 years) with head and neck cancers who visited our department from 2006 to 2015 and received ion beam therapy. Six patients received carbon ion beam therapy, and the other two patients received proton beam therapy. The medical records of the patients were retrospectively analyzed. The primary site was the nasal and paranasal sinuses in six cases, nasopharynx in one case, and external auditory canal in one case. The histological type was olfactory neuroblastoma, malignant melanoma, and adenoid cystic carcinoma in two cases each, and chondrosarcoma and squamous cell carcinoma in one case each. The exposure dose ranged from 64 to 70.4 GyE. The average follow-up period was 42.0 months. Early adverse events were generally mild, and complete therapeutic response was obtained in all cases. However, five patients developed severe late complications including craniospinal dissemination, osteoradionecrosis of the maxilla and skull base, brain necrosis, and loss of eyesight. Three patients died of distant metastasis, local recurrence and/or brain necrosis within 2 years, and four patients have been surviving with distant metastasis or severe late complications. Ion beam therapy exhibits outstanding antitumor effects, but the severe late complications of the therapy must also be recognized.

Electrical Impedance and Expression of Tight Junction Components of the Nasal Turbinate and Polyp.

PURPOSE: We investigated the electrical impedance and expression of tight junction components of the turbinate mucosa, nasal polyp, and normal skin. PROCEDURES: The inferior turbinate and nasal polyp of patients with chronic rhinosinusitis and the postauricular skin of patients with otitis media were examined. Electrical impedance was measured in vivo using a tissue conductance meter. Expressions of claudin-1 and tricellulin were examined by fluorescence immunohistochemistry and quantitative RT-PCR. RESULTS: Electrical impedance was higher in the skin than in the turbinate and polyp, but did not differ between the turbinate and polyp. Immunoreactivities for claudin-1 and tricellulin were seen in the epithelial/epidermal layer. Expression of claudin-1 was higher in the skin than in the turbinate and polyp. The polyp tended to show higher expression of claudin-1 but showed lower expression of tricellulin than the turbinate. The ratio of claudin-1 to tricellulin was highest in the skin and lowest in the turbinate. The correlation between expressions of the two tight junction components was strongly positive in the skin (r = 0.964) and negative (r = -0.527) in the turbinate and polyp. CONCLUSIONS: These results suggest that the roles of claudin-1 and tricellulin in barrier function may be complementary, and may thereby maintain a constant level of permeability of the mucosal tissues.

A role of nesfatin-1/NucB2 in dehydration-induced anorexia.

Nesfatin-1/NucB2, an anorexigenic molecule, is expressed mainly in the hypothalamus, particularly in the supraoptic nucleus (SON) and the paraventricular nucleus (PVN). Nesfatin-1/NucB2 is also expressed in the subfornical organ (SFO). Because the SON and PVN are involved in body fluid regulation, nesfatin-1/NucB2 may be involved in dehydration-induced anorexia. To clarify the effects of endogenous nesfatin-1/NucB2, we studied changes in nesfatin-1/NucB2 mRNA levels in the SFO, SON, and PVN in adult male Wistar rats after exposure to osmotic stimuli by using in situ hybridization histochemistry. Significant increases in nesfatin-1/NucB2 mRNA levels, ∼2- to 3-fold compared with control, were observed in the SFO, SON, and PVN following water deprivation for 48 h, consumption of 2% NaCl hypertonic saline in drinking water for 5 days, and polyethylene glycol-induced hypovolemia. In addition, nesfatin-1/NucB2 expression was increased in response to water deprivation in a time-dependent manner. These changes in nesfatin-1/NucB2 mRNA expression were positively correlated with plasma sodium concentration, plasma osmolality, and total protein levels in all of the examined nuclei. Immunohistochemistry for nesfatin-1/NucB2 revealed that nesfatin-1/NucB2 protein levels were also increased after 48 h of dehydration and attenuated by 24 h of rehydration. Moreover, intracerebroventricular administration of nesfatin-1/NucB2-neutralizing antibody after 48 h of water deprivation resulted in a significant increase in food intake compared with administration of vehicle alone. These results suggested that nesfatin-1/NucB2 is a crucial peptide in dehydration-induced anorexia.

[Effect of septoplasty and turbinectomy on obstructive sleep apnea syndrome].

Obstructive sleep apnea syndrome (OSAS) is thought to be closely related to nasal airway resistance, which accounts for approximately one half of total upper airway resistance. This retrospective study aimed at elucidating the effect of endoscopic endonasal surgery on OSAS. Nine consecutive patients with OSAS complaining of nasal obstruction who underwent endoscopic endonasal surgery were enrolled. They were 8 men and 1 woman ranging from 34-73 years of age with an average of 53.2 years. All patients had chronic hypertrophic rhinitis and nasal septal deviation, and underwent septoplasty and submucous turbinectomy. The severity of OSAS was assessed by 8 sleep apnea indices of polysomnography before and after surgery. The indices included the apnea-hypopnea index (AHI), maximum apnea time, mean apnea time, minimum blood oxygen saturation, mean blood oxygen saturation, blood oxygen saturation decline index, awakening response index, and ratio of snoring time to sleep time. Significant decrease in the AHI (27.6 +/- 5.3 vs. 20.7 +/- 5.5/hr; p = 0.033), in the awakening response index (30.5 +/- 3.3 vs. 21.2 +/- 5.3/hr; p = 0.028), and increase in the mean blood oxygen saturation (95.1 +/- 0.7 vs. 96.0 +/- 0.7%; p = 0.023) were observed postoperatively. There was no significant change in the other 5 indices. In addition, nasal airflow resistance measured by acoustic rhinometry had significantly reduced during the periods of both inhalation (474.4 +/- 49.0 vs. 842.7 +/- 50.2cm3/s; p = 0.002) and exhalation (467.3 +/- 57.3 vs. 866.0 +/- 80.6 cm3/s; p = 0.004). The pre- and postoperative body mass indices did not differ statistically from each other. These results indicate that endoscopic endonasal surgery alone has a potential effect on sleep-disordered breathing in OSAS patients with nasal obstruction. We should be aware of such a positive impact of endonasal surgery upon the management of OSAS.

Synergism of Staphylococcus aureus colonization and allergic reaction in the nasal cavity in mice.

BACKGROUND: The aim of this study is to investigate the reciprocal effect of Staphylococcus aureus colonization and allergic rhinitis in an allergy model of mice. METHODS: BALB/c mice with intraperitoneal ovalbumin (OVA) sensitization and/or intranasal S. aureus inoculation were prepared. The following 4 groups were designed: an OVA-sensitized S. aureus-inoculated (AR-SA) group, an OVA-sensitized uninoculated (AR) group, a nonsensitized S. aureus-inoculated (SA) group, and a nonsensitized uninoculated (control) group. After intranasal OVA challenge, nasal lavage fluid, peripheral blood, and nasal mucosa were collected. Polymorphonuclear cells in the nasal lavage fluid were counted, serum OVA-specific IgE and IgG1 were measured by enzyme immunoassays, and IL-4, IL-5, and IFN-γ mRNAs in the nasal mucosa were assessed by quantitative real-time reverse transcription-PCR. The number of S. aureus in the nasal mucosa and lavage fluid was counted. RESULTS: Both eosinophil and neutrophil counts were larger in the AR-SA group than in the other groups. Both IgE and IgG1 levels were higher in the AR and AR-SA groups than in the SA and control groups, and the IgG1 level was higher in the AR-SA group than in the AR group. The expression of IL-4 mRNA was higher in the AR-SA group than in the other groups, and the expression of IL-5 mRNA was higher in the AR-SA group than in the SA group. The AR-SA group showed higher counts of S. aureus in the nasal mucosa than the SA group. CONCLUSION: These results indicate the mutually potentiating effect of S. aureus colonization and allergic rhinitis.

[Recovery of bone conduction hearing level after stapes surgery in otosclerosis].

Although otosclerosis is essentially a middle ear disease, patients with this disease often exhibit mixed hearing loss. This discrepancy is thought to be explained by the following mechanism: the resonance of the ossicular chain is disturbed by the fixation of stapes, leading to the attenuation of inertial bone conduction. The bone-conduction hearing level usually recovers after stapes surgery. We herein studied the change in air- and bone-conduction hearing after stapes surgery in patients with otosclerosis. Six consecutive patients with otosclerosis who underwent stapes surgery in our department were enrolled. They were 2 men and 4 women, ranging in age from 16 to 74 with an average of 57.2 years. Stapedotomy was performed in 5 patients, and the other patient underwent partial stapedectomy. Their pure tone hearing levels of air and bone conduction were measured before and after surgery. In the air conduction, the hearing levels at 125, 250, 500, 1000, 2000, and 4000 Hz significantly improved after surgery, but showed no significant change at 8000 Hz. On the other hand, in the bone conduction, the hearing levels at 500 and 1000 Hz significantly improved after surgery, whereas those at 250, 2000, and 4000 Hz showed no significant change. The recovery of the bone conduction hearing at 500 and 1000 Hz is explained by the resonance of the ossicular chain. However, the unimproved bone conduction hearing at 2000 Hz is unexplainable, and remains to be further investigated in future studies.

[Prognostic factors of IgA nephropathy after tonsillectomy].

Tonsillectomy is one of the prevailing treatments for IgA nephropathy. This retrospective study aimed to elucidate prognostic factors for the postoperative kidney function of tonsillectomized patients with IgA nephropathy. Forty consecutive patients with IgA nephropathy who underwent tonsillectomy in our department between 1999 and 2008 were enrolled. They were 21 men and 19 women with ages ranging 14-52 years with an average age of 25.5 years. The patients were classified into remission and non-remission groups based on their kidney function assessed 1 year after surgery according to the clinical guidelines for IgA nephropathy of the Japanese Society of Nephrology. Patients' profiles and preoperative physical findings/laboratory data in the remission group were then compared with those in the non-remission group. The remission and non-remission groups included 13 and 27 patients, respectively. The remission group showed a significantly shorter interval between onset to surgery (2.3 +/- 2.1 vs. 5.0 +/- 6.7 years; p = 0.032), a lower diastolic blood pressure (66 +/- 13 vs. 75 +/- 17 mmHg; p = 0.040), a higher level of serum total protein (7.6 +/- 0.5 vs. 7.0 +/- 0.7 mg/dl; p = 0.015), and a higher degree of tonsillar hypertrophy (I degrees: II degrees: III degrees = 5 : 8: 0 vs. 21 : 6 : 0; p = 0.033) in comparison with the non-remission group. Multiple logistic regression analysis also revealed that patients with a higher level of serum total protein and those with a higher degree of tonsillar hypertrophy were more likely to recover. We should carefully consider these prognostic factors when indicating tonsillectomy for the treatment of IgA nephropathy.

Retreatment with nivolumab for patients with recurrent and/or metastatic head and neck cancer.

BACKGROUND: After treatment with an immune checkpoint inhibitor (ICI) is discontinued, retreatment with an ICI is a potential sequential treatment, but the clinical efficacy/safety data for this treatment of recurrent and/or metastatic head and neck cancer (R/M-HNC) are limited. AIMS/OBJECTIVES: This study aimed to evaluate the efficacy and safety of retreatment with nivolumab in R/M HNC. MATERIALS AND METHODS: We divided the 29 eligible R/M-HNC patients who discontinued ICI treatment at our hospital into two cohorts to analyze the clinical characteristics and the efficacy of the salvage therapy: the Niv cohort (nivolumab retreatment) and the no-Niv cohort (no nivolumab retreatment). RESULTS: The Niv cohort's median overall survival (OS) of 17.5 months (95% confidence interval [CI]: 2.7-32.3) was significantly prolonged compared to that of the no-Niv cohort: 5.8 months (95%CI: 2.4-9.2, p = .034). The Niv cohort achieved objective response rate of 16.7% and a disease control rate of 50.0%. No adverse events > grade 3 occurred in the Niv cohort. CONCLUSION: Nivolumab retreatment is an option for sequential treatment post-immunotherapy.

Pattern of Recurrence After Platinum-Containing Definitive Therapy and Efficacy of Salvage Treatment for Recurrence in Patients with Squamous Cell Carcinoma of the Head and Neck.

Background: In first-line systemic therapy for unresectable recurrent and/or metastatic squamous cell carcinoma of the head and neck (R/M SCCHN), regimens are generally selected by time-to-relapse with 6 months cutoff after platinum (Pt)-containing definitive therapy, Pt-refractory or Pt-sensitive recurrence, but clinical characteristics between Pt-refractory and Pt-sensitive recurrence of R/M SCCHN has not been fully investigated. This study aimed to evaluate pattern of recurrence and efficacy for salvage treatment for recurrence after Pt-containing definitive therapy for R/M SCCHN in a real-world setting. Methods: We retrospectively reviewed 150 patients treated with Pt-containing definitive therapy and analyzed the pattern of recurrence and efficacy of salvage therapy for 63 patients with R/M SCCHN. Results: Pt-refractory recurrence, Pt-sensitive recurrence, second primary cancer (SPC), and no relapse occurred in 23.3%, 18.7%, 14.7%, and 43.3% of patients, respectively. In the cases with distant metastatic recurrence, symptomatic recurrence was significantly more common in the Pt-refractory recurrence, while asymptomatic recurrence was significantly more common in the Pt-sensitive recurrence. The timing of detection of SPC was after 2 years in 59.0% of cases after the completion of definitive therapy and 63.6% of SPC were asymptomatic. There was a significant difference in ΔNLR2 (NLR after definitive therapy minus NLR at detection recurrence; p = 0.028) and in prognosis after the detection of recurrence for the overall population (p = 0.021), and for salvage treatment group (p = 0.023), and systemic therapy group (p = 0.003) between Pt-refractory and Pt-sensitive groups. Conclusions and Significance: Our analysis revealed the recurrence pattern after Pt-containing definitive therapy and showed the validity of dividing patients into Pt-refractory and Pt-sensitive recurrence with different prognosis in salvage therapy, especially systemic therapy.

Decreased CFTR/PPARγ and increased transglutaminase 2 in nasal polyps.

OBJECTIVE: Transglutaminase (TGM)2 and peroxisome proliferator-activated receptor (PPAR)γ are thought to participate in the pathogenesis of nasal polyp formation in cystic fibrosis (CF). We herein investigated expressions of cystic fibrosis transmembrane conductance regulator (CFTR), TGM2, PPARγ and isopeptide bonds, a reaction product of TGM, in non-CF nasal polyps. METHODS: Nasal polyps and inferior turbinates were collected from chronic rhinosinusitis patients without CF during transnasal endoscopic sinonasal surgery. Expressions of CFTR, TGM2, isopeptide bonds and PPARγ were examined by fluorescence immunohistochemistry and quantitative RT-PCR. Expression of CFTR was also analyzed by Western blot. RESULTS: Immunohistochemical fluorescence of the nasal polyp was significantly lower for CFTR and PPARγ, and significantly higher for TGM2 and isopeptide bonds than that of the turbinate mucosa. Lower expression of CFTR in the nasal polyp than in the turbinate mucosa was also observed in Western blot. Expression of PPARG mRNA was significantly lower in the nasal polyp than in the turbinate mucosa, whereas expressions of CFTR mRNA or TGM2 mRNA did not differ between the two tissues. Immunohistochemical fluorescence for CFTR showed significant negative correlation with that for TGM2 and isopeptide bonds, and significant positive correlation with that for PPARγ. The fluorescence for TGM2 was positively correlated with that for isopeptide bonds and negatively correlated with that for PPARγ. The fluorescence for isopeptide bonds tended to be negatively correlated with that for PPARγ. CONCLUSIONS: These results suggest a possible role of the CFTR-TGM2-PPARγ cascade in the pathogenesis of nasal polyp formation in non-CF patients as in CF patients.

Biophysical properties of the neck skin indicating potential complications of salvage surgery for laryngeal/hypopharyngeal cancer.

BACKGROUND: Chemoradiation therapy is standard practice for hypopharyngeal and laryngeal cancer, but its impact on skin health can cause complications if salvage surgery is required. AIMS/OBJECTIVES: To develop simple objective indices for the early detection of complications following head-and-neck salvage surgery. MATERIAL AND METHODS: Preoperatively and on postoperative days 1, 3, 5 and 7, we measured skin hardness (N), interstitial liquid content (П) and intracellular liquid content (W) as biophysical properties in patients who underwent post-CRT salvage therapy and those who underwent total organ resection without CRT as controls. We then analyzed these data in relation to occurrence of complications. RESULTS: In 11 patients undergoing salvage surgery and 23 controls, complications tended to be higher (p = .54) in the salvage group. N values were significantly higher in the salvage and complication groups on days 5 and 7, П values were higher in the complication group on day 7, and W values were lower in the complication group on day 3 and in the salvage group preoperatively and on days 1 and 5. CONCLUSIONS AND SIGNIFICANCE: N, П and W are useful measurements for the early identification of patients likely to develop complications.

Video-Assisted Thyroidectomy Using a Surgical Energy Device: Initial Experience in a Japanese Single-Center Cohort.

OBJECTIVE: Video-assisted thyroidectomy (VAT) was approved for coverage under the Japanese public health insurance system in 2016. In our department, we introduced VAT in 2018, and we have since been performing the procedure with the assistance of surgical energy devices. We herein summarize our cases undergoing VAT, including a review of points to consider when introducing the procedure, and characteristics of the surgical energy devices. METHODS: We enrolled 24 patients (14 women and 10 men; age: 24-83 years; mean: 59.0 years) with thyroid/parathyroid tumors who underwent VAT between January 2018 and March 2021 at our department. The medical records of the patients were reviewed, and demographic data, clinical characteristics, histological type, treatment outcomes, and complications were analyzed. RESULTS: The surgical energy devices used were LigaSure® in the first 4 cases, Acrosurg®. Scissors S17 in the next 13 cases, and Acrosurg®. Revo S15 in the latest 7 cases. The operation time (range: 72-250 min; mean: 147 min), intraoperative blood loss (range: 5-370 mL; mean: 33 mL), indwelling time of wound drain (range: 2-6 days; mean: 3.5 days), and hospitalization period (range: 3-8 days; mean: 5.5 days) were within acceptable ranges. In this study, it is suggested that Acrosurg®. Revo S15 can shorten the indwelling time and the hospitalization period. There were no serious complications, but 1 patient developed transient vocal cord paralysis, which improved 3 months after surgery. It was suggested that the microwave energy devices, Acrosurg®. Scissors S17 and Acrosurg®. Revo S15, may be more effective with respect to sealing/hemostasis/coagulation capacity and controllability than the high-frequency electrosurgical device, LigaSure®. CONCLUSION: Based on this initial experience, VAT using surgical energy devices appeared to be a safe, effective, and minimally invasive procedure for the treatment of thyroid/parathyroid tumors. Further studies confirming these early findings are needed.

Frequency-specific efficacy of intratympanic steroid on idiopathic sudden sensorineural hearing loss.

Background: Hearing recovery would be different in each sound frequency in patients with idiopathic sudden sensorineural hearing loss (ISSNHL).Aims/objectives: To analyze frequency-specific efficacy of intratympanic steroid on ISSNHL.Materials and methods: Of a total of 381 patients with ISSNHL (hearing threshold ≥40 dB; ≤30 days until treatment), 174 patients (174 ears) received systemic steroid plus hyperbaric oxygen therapy (HBO group), and 207 patients (208 ears) received systemic plus intratympanic steroid (IT group). Hearing thresholds at 125-8000 Hz were measured at every octave before and after treatment.Results: % of patients with hearing gains ≥10 dB in the IT group was significantly higher for 500 Hz and the average of 5 mid-frequencies, tended to be higher for 1000 Hz, but was significantly lower for 8000 Hz, compared to the HBO group. Multiple regression analysis showed that hearing recovery was negatively correlated with patients' age for 125/2000/4000/8000 Hz and with days from onset to treatment for all frequencies, and also revealed better hearing recovery at 500/1000 Hz in the IT group than in the HBO group.Conclusions: Intratympanic steroid is more effective than hyperbaric oxygen to yield better hearing outcomes at mid-frequencies and would be advantageous to restore sound/speech perception.Significance: Superiority of intratympanic steroid over hyperbaric oxygen for treating ISSNHL was verified.

Calmodulin and protein kinases A/G mediate ciliary beat response in the human nasal epithelium.

BACKGROUND: Mucociliary clearance of the airway epithelium is an essential function for mucosal defense. We recently proposed a hypothetical mechanism of ciliary beat regulation, in which the pannexin-1 (Panx1)-P2X7 unit serves as an oscillator generating a periodic increase in intracellular Ca2+ ([Ca2+ ]i ). In the present study, we examined the localization of Panx1 and P2X7 at the ultrastructural level, and investigated the regulatory pathway subsequent to [Ca2+ ]i increase. METHODS: The inferior turbinate mucosa was collected from patients with chronic hypertrophic rhinitis during endoscopic sinonasal surgery. The mucosa was examined by transmission immunoelectron microscopy for Panx1 and P2X7. Alternatively, the mucosa was cut into thin strips, and ciliary beat frequency (CBF) was measured under a phase-contrast light microscope with a high-speed digital video camera. RESULTS: In immunoelectron microscopy, immunoreactivities for Panx1 and P2X7 were localized along the plasma membrane of the entire length of the cilia. CBF was significantly increased by stimulation with 100 µM acetylcholine (Ach). The Ach-induced CBF increase was significantly inhibited by calmidazolium (calmodulin antagonist), SQ22536 (adenylate cyclase inhibitor), ODQ (guanylate cyclase inhibitor), KT5720 (protein kinase A inhibitor), and KT5823 (protein kinase G inhibitor). Fluorodinitrobenzene (creatine kinase inhibitor) completely inhibited the ciliary beat in a time- and dose-dependent manner. CONCLUSION: These results indicate that Panx1 and P2X7 coexist at the cilia of the human nasal epithelial cells and that the ciliary beat is regulated by calmodulin, adenylate/guanylate cyclases and protein kinases A/G, and crucially depends on creatine kinase.