Animals ; Autophagy ; genetics ; Genes ; Humans ; Neoplasms ; genetics ; pathology ; Signal Transduction ; TOR Serine-Threonine Kinases ; metabolism

OBJECTIVE: Dicerl plays an important role in generation of microRNA, the purpose of this study was to evaluate Dicerl expression and its prognostic value in nasopharyngeal carcinoma (NPC). METHOD: The protein expression of Dicerl was examined by immunohistochemistry in 276 NPC specimens, and the mRNA levels of Dicerl were analyzed by qRT-PCR in 56 NPC and 11 nasopharyngitis tissues. Cox regression analysis was used to identify independent prognostic factors, and a prognostic score model was constructed for survival prediction. RESULT: Expression of Dicerl was downregulated in NPC tissues at both the mRNA and the protein levels, and there was a notable positive correlation between the expression levels of Dicerl mRNA and protein. Low Dicerl expression was positively correlated with distant metastasis (P<0. 01) and death (P<0. 05). In addition, low expression of Dicerl was significantly associated with poorer overall survival (HR = 2. 32, 95% CI: 1. 30 ~ 4. 14, P<0. 01) and poorer distant metastasis-free survival (HR = 2. 56, 95% CI: 1. 39 ~ 4. 74, P<0. 01). Furthermore, multivariate analysis showed that low expression of Dicerl and tumor-node-metastasis (TNM) stage were independent prognostic indicators for NPC patients. A prognostic score model combining the Dicerl expression and TNM stage had a better prognostic value than the TNM stage alone model or Dicer) expression alone model (P< 0. 05). CONCLUSION Dicerl was downregulated in NPC tissues at both the mRNA and the protein levels, and low expression of Dicerl could be served as novel prognostic biomarker for NPC patients.
Carcinoma ; DEAD-box RNA Helicases ; biosynthesis ; Humans ; Immunohistochemistry ; Nasopharyngeal Carcinoma ; Nasopharyngeal Neoplasms ; metabolism ; pathology ; Prognosis ; Proteomics ; RNA, Messenger ; Ribonuclease III ; biosynthesis

Objective:To observe the anatomic characteristics of supratubal recess and the morphological change of it in the sick ear. To investigate the relation between the morphological changes of supratubal recess and otitis media.Method:Using high resolution CT to observe and measure the supratubal recess of the normal ears and the ailing ones.Result:For the normal adults, the anteroposterior diameter of the supratubal recess is(3.83±1.28)mm,the vertical diameter(3.67±1.14)mm,the height(3.76±0.36)mm;and the length of the cog is(2.84±0.38)mm.The size of the supratubal recess showed no significant difference between left and right(P＞0.05).There was no relationship between the size of the supratubal recess and pneumatization of mastoid cells (P＞0.05).There was significant differences in size of the supratubal recess between normal ears and the ears with cholesteatoma(P＜0.05),but there was no relationship between the size of the supratubal recess and pneumatization of mastoid cells(P＞0.05)in the ears with cholesteatoma.There was no significant differences in size of the supratubal recess between normal ears and the ears with chronic otitis media(P＞0.05).In the ears with cholesteatoma,40% had osseous destruction in supratubal recess.Conclusion:For the normal adults, the size of the supratubal recess showed no significant difference between left and right, and there was no relationship between the size of the supratubal recess and pneumatization of mastoid cells. Anterior tympanic isthmus , posterior tympanic isthmus and supratubal recess which is the supplement of the formers constitute the air way between attic and mesotympanum. The supratubal recess of the cholesteatoma is smaller than the normal, when the eustachian tube dysfunction occurs, the air way in the middle ear would herein be affected, and cholesteatoma forms eventually. There was no significant differences in size of the supratubal recess between normal ears and ears with chronic oti-tis media, as in the clinic.The effect of the supratubal recess should be taken into account when we consider the pathogeny and treatment of the middle ear cholesteatoma.

ObjectiveTo discuss the application of medical elastic stockings in nursing of patients with deep venous thrombosis formation. Methods62 patients diagnosed as acute lower limbs deep ve-nous thrombosis from January, 2005 to January, 2008 were randomly divided into the experimental group and the control groups with 31 patients in each group, the control group took general nursing measures, the experimental group used the medical elastic stockings based on the general care measures, The inci-dence of post- thrombosis syndrome was observed in two groups and underwent χ2 test. ResultsAfter two years follow- up, 2 patients relapsed and 3 patients appeared post- thrombosis syndrome in the experimental group, 8 patients relapsed and 10 patients had post-thrombosis syndrome in the control group. The relapse rate and incidence rate of peat-thrombosis syndrome in the control group were higher than those of the experimental group. ConclusionsThe use of medical elastic stockings can prevent acute lower limbs deep venous throm-bosis, and can reduce the symptoms of post-thrombosis syndrome, which deserves to be spread widely.

Female patients, 41 years old, with the left nasal cavity bleeding intermittently and left nasal congestion 20 days as the chief complaint to the hospital. Physical examinationindicated dark red mass was at the front-end of left nasal cavity, which has not smooth surface with blood vessels and hemorrhagic secretions, and back up to the middle turbinate. Sinus enhancement 3D-CT showed soft tissue density can be found in the left nasal cavity,Scan CT value is 37-47 HU, and enhanced and delay is about 69-78 HU. Nasal septum,middle turbinate and inferior turbinate bonewas visible damage. The pathologic biopsy of left nasal cavity lesions results conform to the Kaposiform hemangioendothelioma.
Adult ; Female ; Hemangioendothelioma ; pathology ; Humans ; Kasabach-Merritt Syndrome ; pathology ; Nasal Septum ; Paranasal Sinuses ; Sarcoma, Kaposi ; pathology ; Tomography, X-Ray Computed ; Turbinates ; pathology

Patients with nasopharyngeal foreign body sensation for 3 years, and had nasal obstruction in the past six months. electric nasopharyngoscopy: a irregular ellipse shape mass occupied in the nasopharynx, the mass surface is not smooth, with erosion ulcer and filthy secretions, the mass had a root in the back-end of nasal septum, and was adjacent to the bilateral round pillow. Sinus CT showed an irregular soft tissue shadow connected to the nasal septum backend in the nasopharynx, the size is about 2.8 cm X 3.5 cm, CT value is about 43 HU. Pathological examination: papillary adenocarcinoma.
Adenocarcinoma, Papillary ; diagnosis ; surgery ; Endoscopy ; Humans ; Nasal Obstruction ; Nasal Septum ; pathology ; Nasal Surgical Procedures ; Nasopharynx ; Tomography, X-Ray Computed

A male of 17 years old complained of bilateral nasal congestion with mouth breathing for half a year. The physical examination showed patency of bilateral nasal cavity. Nasopharyngeal fiberscope revealed a huge spherical smooth reddish mass at the nasopharyngeal posterior wall and the back-end of nasal cavity blocking the entire postnaris and contacting with bilateral tubal tori, the size of which is about 3.5 cm x 2.5 cm. The nasopharyngeal 3D-CT showed a low density cystic mass area in the nasopharynx with smooth edges, and the CT value is approximately 32.4 HU. No exact enhancement was observed. The cystic mass originated from and compressed the back end of nasal septum. A semicircular defect in the leading edge of clivus was observed, and the inferior wall of sphenoid sinus is compressed uplifted upwards. The nasopharyngeal MR showed that the nasopharyngeal lesion presented short T1 and long T2 signals with multiple small wall nodules around. Neither the lesion nor the peripheral nodules can be significantly enhanced by enhancement scan. After a nasal endoscopic surgery, the case was definitely diagnosed as nasal septum back-end huge cyst.
Adolescent ; Cysts ; Humans ; Male ; Nasal Septum ; pathology

Objective To study the protective role against cisplatin-induced ototoxicity by using radix astra-gali in rats. Methods Forty rats were randomly divided into four groups. Group A received saline as controls. Group B received radix astragali. Group C received injection of cisplatin(4 mg/kg) as experiments for 6 days. Group D received both radix astragali (5 g/kg) and cisplatin (4 mg/kg). Distortion product acoustic emission (DPOAE) was applied to each rat before and 7 days after cisplatin injection. All the animals were sacrificed on the 7th day. Half of the cochleas were observed by frozen section and the apoptosis of hair cells was detected by TUNEL meth-od. Scanning electron microscopy was utilized to evaluate the cochlear morphology of the other rats. Results The DPOAE amplitudes of Group C decreased significantly compared to the group A and group B(P<0.01). The dam-age and apoptosis of hair cells were noted in the group C and group D, while the hair cells of group A and group B showed no sign of apoptosis or damage. Compare to experimental group , the DPOAE amplitudes of group D were higher, and the damage and apoptosis of hair cells were significantly lower(P<0.05). Conclusion This study sug-gests that radix astragali can effectively reduce cisp[atin ototoxicity.

OBJECTIVE To discuss the gentamycin-induced ototoxity and mechanism on cochlear outer hair cells. METHODS All the guinea pigs were randomly divided into 3 groups. Gentamycin, gentimycin plus furosemide and normal saline were intraperitoneally injected for 6 days respectively. The amplititude of distortion product otoacoustic emissions (DPOAE)urface prepration of cochlear basilar membrane, hair cells’ apoptosis and expression of caspase-3 after injection were analyzed. RESULTS Reduction of the DPOAE amplitude, hair cell damage, apoptosis and Caspase-3 expression were observed in group injected with gentamycin as well as in group injected with gentamycin plus furosemide. CONCLUSION Gentamycin should induce hair cell damage in the cochlea of guinea pigs and Caspase-3 plays an important role in the process of hair cell apoptosis.

Objective:To determine the mechanism of sunitinib-induced autophagy in renal cell carci-noma cells.Methods:MTS assay was applied to detect the cell viability alteration under the treatment of sunitinib (2,8 μmol /L).The sunitinib-induced autophagy as well as cell apoptosis was measured and compared after knocking down autophagy-related protein Beclin1 and microtubule associated protein 1 light chain 3 fusion protein (LC3)by RNA interference.The transmission electron microscope was used to observe the formation of autophagosomes in ACHN cells.The fluorescence microscope was used to mo-nitor distribution and aggregation of endogenous LC3-Ⅱ.The expressions of protein such as LC3-Ⅱ,the autophagic regulation molecules protein kinase B /mammalian target of rapamycin (Akt/mTOR)and the symbol of apoptosis poly ADP-ribose polymerase (PARP)were capable to be detected by immunoblotting assay.Results:Sunitinib was able to significantly trigger cell viability loss in the renal carcinoma cell ACHN,which was both in a concentration-dependent and time-dependent manner (P <0.05 ).After reducing the autophagy by knocking down Beclin1 and LC3,the number of cleavage of PARP was in-creased remarkably,whereas there was nearly not any cleavage in the mock group.By the transmission electron microscope,there were more autophagic vacuoles in ACHN cells after being administrated with sunitininb compared with the control.And the nuclear-to-cytosol translocation as well as aggregation of LC3-Ⅱ was presented after sunitinib treatment by the fluorescence microscope,which was the proof of the enhanced autophagy.According to the immunoblotting,sunitinib was able to increase the accumula-tion of LC3-Ⅱ.At the same time,the result of sunitinib combined with chloroquine,a drug which blocked the fusion of autophagosomes and lysosomes,demonstrated that the increasing amount of LC3-Ⅱwas due to the enhanced autophagy flux by sunitinib treatment in ACHN cells.However,phosphorylation of Akt as well as mTOR was decreased at the same time.The rapamycin (mTOR inhibitor)or knocking down Akt subunits could change the sunitinib-induced LC3-Ⅱ accumulation,whereas overexpression of Akt subunits decreased the autophagic flux,indicating that Akt/mTOR was the target of sunitinib in auto-phagy.Conclusion:Sunitinib induced autophagy via suppressing Akt/mTOR pathway,and the auto-phagy was involved in apopotosis.