The majority of parathyroid tumors are benign, and parathyroid carcinomas represent a diagnostic challenge with limited treatment options. Multiple endocrine neoplasia type 1 gene and cell division cycle 73 (CDC73) are major genes in parathyroid adenomas and carcinomas respectively. However, a large group of parathyroid tumors remain without defined genetic background. Telomeres are chromosome-...

abstract background and aims: cervical cancer is among leading causes of cancer related death in women and human papilloma virus (hpv) is one of the important risk factor of this cancer. the aim of the present study was to develop a pcr method for identification of a high carcinogenic type of hpv, hpv 18 using e6 gene as a marker in patients with cervical cancer materials and methods: 92 formal...

carcinoma derived from the virus-induced rabbit papillontá has been the subject of numerous stud iss. Early work indicated that the carcinoma (V2) did not contain papilloma virus demonstrable by the usual infectivity tests. Nevertheless, there was reason to believe that papilloma antigen was pres cut in the V2 carcinoma cell, since the host rabbits developed specific papilloma complement-fixin...

Backgroud: Telomerase activity, mainly regulated by the human telomerase reverse transcriptase (hTERT) gene, plays critical roles in tumor growth and progression through the maintenance of telomere length and structure. Telomerase is elevated in most malignant tumors as well as in breast cancer, the ubiquitous expression of telomerase makes it a promising target for cancer therapy. With the goa...

Telomerase plays important roles in the development and progression of malignant tumors, and its activity is primarily determined by transcriptional regulation of human telomerase reverse transcriptase (hTERT). Several mRNA alternative splicing variants (ASVs) for hTERT have been identified, but it remains unclear whether telomerase activity is directly associated with hTERT splicing transcript...

BACKGROUND: Telomerase is a ribonucleoprotein enzyme that synthesises telomeres after cell division and maintains chromosomal length and stability thus leading to cellular immortalisation. The hTERT (human telomerase reverse transcriptase) subunit seems to be the rate-limiting determinant of telomerase and knowledge of factors controlling hTERT transcription may be useful in therapeutic strateg...

Activation of telomerase is a crucial step during cellular immortalization and malignant transformation of human cells and requires the induction of the catalytic component, human telomerase reverse transcriptase (hTERT), encoded by the hTERT gene. It is poorly understood how the hTERT gene is activated in human cancer cells. In the present study, we examined the hTERT gene copy number in human...

Cervical epithelial cell immortalization with defined genetic factors without viral oncogenes has never been reported. Here we report that HPV-negative cervical epithelial cells failed to be immortalized by telomerase activation or the combination of p53 knockdown and telomerase activation. Under those conditions, p16INK4a expression was always elevated during the late stage of limited cell lif...

Telomerase is activated in most human cancers and is critical for cancer cell growth. However, little is known about the significance of telomerase activation in chromosome instability and cancer initiation. The gene encoding the potent endogenous telomerase inhibitor PinX1 (PIN2/TRF1-interacting, telomerase inhibitor 1) is located at human chromosome 8p23, a region frequently exhibiting hetero...

Solitary endobronchial papillomas (SEPs) are rare benign tumors of the lung, seldom transform to malignancy. This tumor had been reported occasionally manifest like carcinomas histologically. Herein we report 2 cases of SEPs; one is a squamous cell papilloma providing a false impression of interstitial micro-invasion. The other is a mixed squamous cell and glandular papilloma with massive lipid...