OBJECTIVE: To detect the expression of EGFR in different region of laryngeal tissue, and use quantitive analysis to discuss the relation between expression of EGFR and histological differentiation. METHOD: Collected 36 cases of laryngeal tissue example, which be divided in to three groups based on pathobiology. Using Western Blot to detect the EGFR expression in cancer tissue, para cancer tissue and normal tissue, and combined imaging analytical technique to analyse the relation between expression of EGFR and histological differentiation. RESULT: In same region of cancer tissue the expression of EGFR is different along with different tissue differentiation (P<0.05), but in normal tissue this different is not existing (P>0.05). In same tissue differentiation the expression of EGFR is different in cancer tissue, para cancer tissue and normal tissue (P<0.05). CONCLUSION EGFR highly express in laryngeal cancer tissue, and relate with the tissue differentiation of laryngeal cancer. EGFR is an important indicator to study the emerging and progression of laryngeal cancer.
Carcinoma, Squamous Cell ; metabolism ; pathology ; Cell Differentiation ; ErbB Receptors ; metabolism ; Humans ; Laryngeal Neoplasms ; metabolism ; pathology

OBJECTIVE: To investigate the expression of EMS1 in laryngeal carcinoma and its clinical significance. METHOD: The expression of EMS1 protein was measured in 40 samples of, 40 samples of para carcinoma tissues (which were near to cutting margin of laryngeal carcinoma tissue over 0.5 cm), and 20 samples of normal laryngeal mucosa as controls by Flow Cytometer (Epics-XL II). RESULT: The quantity and percentage of EMS1 protein expression in laryngeal carcinoma tissues was significantly higher than those in para carcinoma and in normal laryngeal mucosa tissues respectively (P<0.05). There was no significant expression difference between the para carcinoma tissues and normal laryngeal mucosa tissues. There were positive correlation between the expressions of EMS1 protein and metastasis, pathological grade and clinical stage in laryngeal carcinoma. But there were not relationship with patients' clinical classification, tumor size, smoking history, age and sex. CONCLUSION The high expression of EMS1 may contribute to the carcinogenesis and development of laryngeal carcinoma. The expression of EMS1 protein is an important index of judging differentiation, infiltration, metastasis and staging of laryngeal carcinoma.
Adult ; Aged ; Carcinoma, Squamous Cell ; metabolism ; pathology ; Cortactin ; metabolism ; Female ; Humans ; Laryngeal Mucosa ; metabolism ; pathology ; Laryngeal Neoplasms ; metabolism ; pathology ; Male ; Middle Aged ; Neoplasm Staging

OBJECTIVETo observe the expression of adrenomedullin (AM) in the patients with laryngeal carcinoma.

METHODSTwo-step immunohistochemistry method was used to examine the expression of AM in the patients with laryngeal carcinoma. Radioimmunoassay was applied to determine the concentration of AM in the laryngeal carcinoma tissues, adjacent laryngeal mucosa of carcinoma tissues and in the plasma of patients and controls.

RESULTSPositive stainings for AM were found in all 21 specimen examined,distributed mainly in the cytoplasm of the laryngeal carcinoma cells. Positive stainings were more stronger in the circumference than in the center of tumor tissue for the highly and moderately differentiated tumors. While the stainings were distributed homogeneously for poorly and moderately differentiated tumors. The concentration of AM in the laryngeal carcinoma tissues (n = 44) and the adjacent mucosa (n = 44) were (49.67 +/- 28.33) pg/ml and (14.71 +/- 7.17) pg/ml (x +/- s) respectively and laryngeal tumor showed much higher concentration of AM than the adjacent mucosa (u = 135.00, P < 0.01). The concentration of AM in patients with laryngeal carcinoma of T2, T3 and T4 stage were (31.52 +/- 15.22), (56.63 +/- 18.51) and (96.12 +/- 18.22) pg/ml (x + s) respectively,and there were statistically significant difference among them. In the N stage, patients with higher stages were found to express significantly higher AM concentration, but there was not statistically significant difference between NO stage and N1 stage. In the M stage,patients with M1 stage were found to express significantly higher AM concentration (u = 31.00, P < 0.01). But there was not statistically significant difference between AM plasma concentration of laryngeal carcinoma patients and that of healthy controls.

CONCLUSIONSThe results suggested that high expression of AM in tissues of laryngeal carcinoma was related with the TNM stage of laryngeal carcinoma, AM may play an important role in the development of the laryngeal neoplasma.

Adrenomedullin ; metabolism ; Aged ; Carcinoma, Squamous Cell ; metabolism ; pathology ; Female ; Humans ; Laryngeal Mucosa ; metabolism ; pathology ; Laryngeal Neoplasms ; metabolism ; pathology ; Male ; Middle Aged ; Neoplasm Staging

OBJECTIVE: To study the expression of human ether-α-go-go-related gene (herg) and hERG protein expressed by the gene in laryngeal carcinoma compared with the control group(mucosa adjacent to cancer of 2 cm). METHOD: Expression of herg and hERG protein was detected by immunohistochemistry (SP) and real-time PCR in resected tissue of laryngeal carcinoma and mucosa adjacent to cancer of 2 cm. RESULT: (1) By immunohistochemistry, the positive expression rate of hERG in laryngeal carcinoma was 76.7% (23/30), while it was 10.0% (2/20) in mucosa adjacent to cancer of 2 cm, the difference between which was statistically significant (P < 0.05). (2) By real-time PCR, the expression level of herg mRNA in laryngeal carcinoma is 2.25 times higher than that in mucosa adjacent to cancer of 2 cm. CONCLUSION Herg is highly expressed in tissue of laryngeal carcinoma, and it may be have some relevance to the happening and development of laryngeal carcinoma.
ERG1 Potassium Channel ; Ether-A-Go-Go Potassium Channels ; metabolism ; Humans ; Laryngeal Neoplasms ; metabolism ; RNA, Messenger

OBJECTIVE: To investigate the myeloid differentiation factor 88 (MyD88) expression in laryngeal carcinoma and its clinical significance. METHOD: Fifty-one patients with laryngeal carcinoma were collected, and all patients were confirmed by pathological diagnosis results. The expression of MyD88 protein was detected by immunohistochemical method in laryngeal cancer and its adjacent tissues to investigate the correlation among MyD88 expression, clinicopathological characteristics and prognosis of patients. RESULT: The positive expression rate of MyD88 in laryngeal cancer tissues was 68.6%, significantly higher than that in normal tissues adjacent to carcinoma of which positive expression rate was 11.8%; MyD88 positive rate had nothing to do with laryngeal cancer patients age, sex, differentiation and tumour location (all P > 0.05), but correlated with clinical stage (P < 0.01) and lymph node metastasis (P < 0.05). In addition, the study also found that the expression of MyD88 quantity was inversely proportional with the five-year survival rate. The survival rate of patients with higher expression of MyD88 was significantly lower than that of patients with lower expression (P < 0.05). CONCLUSION MyD88 may be an important participant in the pathogenesis of laryngeal carcinoma, MyD88 targeted therapy may improve the prognosis of patients with laryngeal cancer.
Humans ; Laryngeal Neoplasms ; metabolism ; pathology ; Lymphatic Metastasis ; Myeloid Differentiation Factor 88 ; metabolism ; Prognosis ; Survival Rate

OBJECTIVE: To explore the relationship of the local recurrence with the expression of protein Survivin and MMP-2 in the primary lesions and the surgical margins of laryngeal carcinoma. METHOD: The primary lesions and the surgical margins of laryngeal carcinoma of 48 patients were made into serial sections. Immunochemical methods was used to detect the expression of protein Survivin and MMP-2 in the primary lesion and the surgical margins of laryngeal carcinoma of 48 patients. RESULT: The positive expression for Survivin and MMP-2 in the primary lesion was 70.83% (34/48) and 66.67% (32/48) respectively, and the positive expression of Survivin and MMP-2 in the surgical margins of laryngeal carcinoma was 47.92% (23/48) and 37.50% (18/48), which in the primary lesion was significantly higher than those of the surgical margins of laryngeal carcinoma (P < 0.05). The recurrence rates of primary lesion positive for Survivin (34 cases) and MMP-2 (32 cases) were 26.47% (9/34) and 25.00% (8/32), which were higher than negative for them 7.14%(1/14) and 12.50% (2/16) (P > 0.05). The recurrence rates of those with Survivin (23 cases) and MMP-2 (18 cases) positive surgical margins were 34.78% (8/23) and 38.89% (7/18) respectively, which were significantly higher than those with negative ones 8.00% (2/25) and 10.00% (3/30) (P < 0.05). Logistic analysis showed that the expression of Survivin and MMP-2 protein in the surgical margins of laryngeal carcinoma was positively associated with the recurrence rates. CONCLUSION Laryngeal carcinoma patients with Survivin-positive or MMP-2-positive margin would have a higher recurrence rate. Survivin and MMP-2 protein can be used as biomarkers for local recurrence of laryngeal carcinoma after operation.
Biomarkers, Tumor ; metabolism ; Humans ; Inhibitor of Apoptosis Proteins ; metabolism ; Laryngeal Neoplasms ; metabolism ; Matrix Metalloproteinase 2 ; metabolism ; Neoplasm Recurrence, Local ; Survivin

Actins ; metabolism ; Angiomyolipoma ; metabolism ; pathology ; surgery ; Epiglottis ; Factor VIII ; metabolism ; Humans ; Laryngeal Neoplasms ; metabolism ; pathology ; surgery ; Male ; Middle Aged

OBJECTIVETo establish two-dimensional electrophoresis profiles from human laryngeal squamous cell carcinoma tissue and paired normal tumor-adjacent mucosa epithelia tissue, and to identify differential expression proteins.

METHODSThe total proteins of human laryngeal squamous carcinoma tissue and paired normal tumor-adjacent mucosa epithelia tissue were separated by immobilized pH gradient-based two-dimensional gel electrophoresis (2-DE). The differential expression proteins were analyzed using image analysis software, then identified using mass spectrometry and database searching.

RESULTSWell-resolved, reproducible 2-DE patterns of laryngeal squamous cell carcinoma and adjacent normal mucosa epithelial were obtained. Differential protein spots were defined as spots in 2-DE gels. Thirteen proteins were preliminarily identified, naming which 10 proteins were upregulated in laryngeal cancer tissue. Such as cofilin-1, nuclear body protein SP140, GRP94, HSP 90, GSTP1-1, superoxide dismutase [Mn], cyclophilin A, proteasome activator complex subunit 2, apolipoprotein A-I precursor, CaM-like protein and so on. There were 3 proteins downregulated in laryngeal cancer tissue, which were fatty acid-binding protein, calgranulin A and calgranulin B.

CONCLUSIONSThirteen proteins which are associated with the tumorigenesis of the laryngeal squamous cell carcinoma were characterized. These extensive protein variations indicate that multiple protein molecules should be simultaneously targeted as an effective strategy to counter the disease. It is better for understanding of the oncogenesis and pathogenesis in a global way, which in turn is a basis-for the rational designs of diagnostic and therapeutic methods.

Aged ; Carcinoma, Squamous Cell ; metabolism ; Humans ; Laryngeal Neoplasms ; metabolism ; Male ; Middle Aged ; Neoplasm Proteins ; metabolism ; Proteomics ; methods

OBJECTIVE: To study the effect of microRNA-205 (miRNA-205) on proliferation of laryngeal carcinoma cell line Hep-2. METHOD: The expressions of miRNA-205 in 27 cases laryngeal carcinoma tissues and adjacent normal tissues were detected by Real-time quantitative PCR, the expression of PTEN protein was detected by Western blot. The expressions of PTEN were detected by Western blot after miRNA-205 inhibitor or miRNA-205 mimics was transfected into Hep-2 cells and Hep-2 cells proliferation was measured by CCK-8 kit. RESULT: The expression level of miRNA-205 was significantly higher in laryngeal carcinoma tissues than in adjacent normal tissues (P < 0.01), and the expression of PTEN protein was lower in laryngeal carcinoma tissues than in adjacent normal tissues (P < 0.01). The proliferation rate of Hep-2 cells was decreased significantly and the expression of PTEN protein in Hep-2 cells was increased significantly after miRNA-205 inhibitor was transfected into (P < 0.01), and the proliferation rate of Hep-2 cells was increased significantly and the expression of PTEN protein in Hep-2 cells was decreased significantly after miRNA-205 mimics was transfected into (P < 0.01). CONCLUSION miRNA-205 might promote the proliferation of Hep-2 cells by regulating the expression of PTEN.
Cell Line, Tumor ; Cell Proliferation ; Humans ; Laryngeal Neoplasms ; metabolism ; pathology ; MicroRNAs ; antagonists & inhibitors ; metabolism ; PTEN Phosphohydrolase ; metabolism ; Transfection

OBJECTIVE: To investigate the expression of Dickkopf-1 and GATA-6 in laryngeal carcinoma and to discuss their relevance and the roles in carcinogenesis and development of laryngeal carcinoma. METHOD: Immunohistochemical technique was used to detect the expression of Dickkopf-1 and GATA-6 protein in 48 tissues of larynge al carcinoma, 48 para-carcinoma tissues and 20 normal laryngeal mucosal tissues. RESULT: (1) The expression of Dick kopf-1 protein in laryngeal cancer is significantly lower than in para-carcinoma tissues and normal laryngeal mucosa tissues (P < 0.05). (2) The expression of GATA-6 protein in laryngeal cancer is significantly higher than in para-carcinoma tissues and normal laryngeal mucosa tissues (P < 0.05). (3) The expression of Dickkopf-1 and GATA-6 protein in laryngeal cancer is correlated with lymph node metastasis, clinical stage, histological grade (P < 0.05). (4) The expression of Dickkopf-1 and GATA-6 are negatively correlated in laryngeal cancer. CONCLUSION The expression of Dickkopf-1 and GATA-6 may contribute to the carcinogenesis and development of laryngeal carcinoma.
Adult ; Aged ; Female ; GATA6 Transcription Factor ; metabolism ; Humans ; Intercellular Signaling Peptides and Proteins ; metabolism ; Laryngeal Neoplasms ; metabolism ; pathology ; Male ; Middle Aged