Expression of selected molecular factors in two types of endometrial cancer.

Background: Endometrial cancers (EC) are a heterogeneous group of malignant neoplasms differing in etiology, clinical-pathological features and prognosis.

Objectives: To determine the differences between the expression of selected molecular factors and find connections between them in order to isolate possible biomarkers influencing treatment options.

Material And Methods: The investigated data involved archival histological preparations obtained from uterine EC samples taken from 137 patients, treated surgically between 2007 and 2014.

When Is Immunohistochemistry Useful in Assessing Tumor Necrotic Tissue?

Background/aim: Immunohistochemistry (IHC) enables visualisation of the distribution of specific proteins, the differentiation of benign and malignant tumours, and the site and origin of a primary tumour. Surgical pathologists commonly examine tumours with extensive necrosis or non-viable tissue that may affect an accurate diagnosis.

Materials And Methods: We investigated the sensitivity and specificity of IHC on necrotic samples derived from adenocarcinoma, squamous cell carcinoma (SCC) and melanoma using different markers.

Diagnostics of Mutations in MMR/ Genes and Their Role in the Treatment and Care of Patients with Lynch Syndrome.

Lynch syndrome (LS), also known as hereditary nonpolyposis colorectal cancer (HNPCC), is a disorder caused by an autosomal dominant heterozygous germline mutation in one of the DNA mismatch repair (MMR) genes. Individuals with LS are at an increased risk of developing colorectal and extracolonic cancers, such as endometrial, small bowel, or ovarian. In this review, the mutations involved with LS and their diagnostic methods are described and compared, as are their current uses in clinical decision making.

Copy number gains of the putative CRKL oncogene in laryngeal squamous cell carcinoma result in strong nuclear expression of the protein and influence cell proliferation and migration.

Laryngeal squamous cell carcinoma is a major medical problem worldwide. Although our understanding of genetic changes and their consequences in laryngeal cancer has opened new therapeutic pathways over the years, the diagnostic as well as treatment options still need to be improved. In our previous study, we identified CRKL (22q11) as a novel putative oncogene overexpressed and amplified in a subset of LSCC tumors and cell lines.

The role of nesfatin and selected molecular factors in various types of endometrial cancer.

Objectives: Endometrial cancers (ECs) are the most common gynaecological cancers in well developed countries. Diabetes and metabolic syndrome are among the biggest risk factors. Nesfatin-1, the adipokine derivative of NUCB2 (nucleobindin derivative 2) is linked to the clinical course of EC.

Significance of BRCA1 expression in breast and ovarian cancer patients with brain metastasis - A multicentre study.

Purpose: Cerebral metastases develop in 10-30% of patients with breast cancer (BC) and in around 3.3 to 4% of patients with ovarian cancer (OC). The aim of the multicenter study is to investigate the correlation between the expression of estrogen alpha receptors (ERα), progesterone receptors (PR), human epidermal growth factor receptor 2 (HER2), stromal cell-derived factor 1 (SDF1) and its receptor C-X-C chemokine receptor type 4 (CXCR4), breast cancer metastasis suppressor 1 (BRMS1), astrocyte elevated gene 1 (AEG1), depending on the status of BRCA1 protein, in patients suffering from OC and BC with brain metastases.

Studies on selected molecular factors in endometrial cancers.

Background: Endometrial carcinomas (EC) differ in etiology, clinical course and prognosis.

Objectives: This multi-center study aimed at a closer recognition of molecular factors linked to heterogeneity of EC by evaluating estrogen and progesterone receptors, proteins dependent on MMR genes, proteins linked to poor prognosis and metastases, and mutations in BRCA1.

Material And Methods: Using sections of paraffin-embedded preparations, in 115 patients with EC type I and 31 with EC type II, expression of ERα, ERβ1, PR, MLH1, and MSH2 proteins, as well as ARID1A, c-MET and BRCA1, was estimated by immunohistochemistry using specific antibodies.

2D and 3D cell cultures - a comparison of different types of cancer cell cultures.

Cell culture is a widely used tool for improving our understanding of cell biology, tissue morphology, and mechanisms of diseases, drug action, protein production and the development of tissue engineering. Most research regarding cancer biology is based on experiments using two-dimensional (2D) cell cultures . However, 2D cultures have many limitations, such as the disturbance of interactions between the cellular and extracellular environments, changes in cell morphology, polarity, and method of division.

Oncogenic BRAF mutations and p16 expression in melanocytic nevi and melanoma in the Polish population.

Introduction: Twenty-five - fifty percent of skin melanomas arise from nevi. Melanocyte proliferation is activated by , then is arrested, but single nevi transform to melanomas. p16 controls arrest, and p16 loss may promote transformation.

Modified methods for efficiently differentiating human embryonic stem cells into chondrocyte-like cells.

Introduction: Human articular cartilage has a poor regenerative capacity. This often results in the serious joint disease- osteoarthritis (OA) that is characterized by cartilage degradation. An inability to self-repair provided extensive studies on AC regeneration.

Is immunohistochemical evaluation of p16 in oropharyngeal cancer enough to predict the HPV positivity?

Aim: Our goal was to determine the expression levels of p16 in the cohort of the OPSCC patients and evaluation of the pathological and clinical differences between these two groups including patients' survival.

Background: HPV infection is the main causative factor of oropharyngeal cancer (OPSCC). Identification of HPV status in OPSCC requires positive evaluation of viral DNA integration into host cell however, p16 accumulation in the proliferating cell layers has been accepted as an alternative marker for HPV infection.

TRIM28 multi-domain protein regulates cancer stem cell population in breast tumor development.

The expression of Tripartite motif-containing protein 28 (TRIM28)/Krüppel-associated box (KRAB)-associated protein 1 (KAP1), is elevated in at least 14 tumor types, including solid and hematopoietic tumors. High level of TRIM28 is associated with triple-negative subtype of breast cancer (TNBC), which shows higher aggressiveness and lower survival rates. Interestingly, TRIM28 is essential for maintaining the pluripotent phenotype in embryonic stem cells.

Does Metformin affect ER, PR, IGF-1R, β-catenin and PAX-2 expression in women with diabetes mellitus and endometrial cancer?

Objective: Diabetes mellitus, as a risk factor for endometrial cancer (EC), causes an increase in insulin and IGF-1 concentrations in the blood serum. The increase in insulin and IGF-1 are considered mitogenic factors contributory to cancer development. Studies suggest that metformin has preventive activity, decreasing mortality and the risk of neoplasms.

Resveratrol delays replicative senescence of human mesothelial cells via mobilization of antioxidative and DNA repair mechanisms.

Resveratrol (3,4',5-trihydroxy-trans-stilbene; RVT) is a natural phytoestrogen known to modulate the rate of senescence in cultured cells. The mechanism by which RVT affects this process is still elusive. In this paper we used human peritoneal mesothelial cells (HPMCs) to examine the effect of RVT (0.

One hundred consecutive cases of sentinel lymph node mapping in colon cancer-the results of prospective, single--centre feasibility study with implementation of immunohistochemical staining.

Purpose: Although the importance of sentinel node biopsy (SNB) in colon cancer (CC) has not been clearly established, this method is proposed as potentially enabling more appropriate staging by means of immunohistochemistry (IHS). The aim of the study was to evaluate the SNB method used in CC treatment taking into consideration the results of the IHS examination.

Materials And Methods: In the period from May 2005 to September 2010 in the 1st Department of Surgical Oncology and General Surgery, Wielkopolska Cancer Centre, 100 SNB in CC were performed.

Study on breast carcinoma Her2/neu and hormonal receptors status assessed by automated images analysis systems: ACIS III (Dako) and ScanScope (Aperio).

Unlabelled: Her-2/neu is overexpressed in 20-30% of breast cancer patients and is associated with a more aggressive disease. Identification of Her-2/c-erbB-2-neu overexpression is based on immunohistochemical [ihc] detection of protein and/or gene amplification in fluorescence in situ hybridization test (FISH). Also Estrogen receptors [ER] and Progesterone receptors [PR] are the prognostic and predictive biomarkers, recently analysed by ihc methods.

Apoptosis as a mechanism for the elimination of cardiomyocytes after acute myocardial infarction.

Apoptosis is recognized as a mechanism of cell loss in the setting of acute myocardial infarction (AMI). Whether it contributes to myocyte elimination late after AMI has not yet been confirmed. We attempted to identify the features of apoptosis in myocytes that survived AMI.

Studies on CYP1A1, CYP1B1 and CYP3A4 gene polymorphisms in breast cancer patients.

Background: The role of CYP1A1, CYP1B1 and CYP3A4 polymorphism in pathogenesis of breast cancer has not been fully elucidated. From three CYP1A1 polymorphisms *2A (3801T>C), *2C (2455A>G), and *2B variant, which harbors both polymorphisms, the *2A variant is potentially carcinogenic in African Americans and the Taiwanese, but not in Caucasians, and the CYP1B1*2 (355G>T) and CYP1B1*3 (4326C>G) variants might increase breast cancer risk. Although no association of any CYP3A4 polymorphisms and breast cancer has been documented, the CYP3A4*1B (392A>G) variant, correlates with earlier menarche and endometrial cancer secondary to tamoxifen therapy.

[Left ventricular remodelling and rebuilding of the infarcted area. Morphometric evaluation of the relationships between left ventricular mass, myocyte diameter, capillary density and fibrosis].

Unlabelled: The aim of the study was to assess the structural changes in both the infarcted region and free left ventricular (LV) wall that underly post-infarct LV remodeling in the human heart.

Material And Methods: Morphometric evaluation was performed in 31 human hearts, as follows: group I (control)--non-cardiac death (mean age: 52.4 +/- 11.

Expression of estrogen receptor beta in the breast carcinoma of BRCA1 mutation carriers.

Background: Breast cancers (BC) in women carrying mutations in BRCA1 gene are more frequently estrogen receptor negative than the nonhereditary BC. Nevertheless, tamoxifen has been found to have a protective effect in preventing contralateral tumors in BRCA1 mutation carriers. The identification of the second human estrogen receptor, ERbeta, raised a question of its role in hereditary breast cancer.

The determination of VEGF and MVD, among patients with primary breast cancer.

The purpose of the study was to ascertain the value of assessment of vascular endothelial growth factor (VEGF) levels and microvessel density, and to search for correlations between them, in women with breast cancer. The assessment considered factors such as the stage of clinical disease advancement--according to International Union Against Cancer, the grade of histological malignancy, status of axillary lymph nodes and the size of the primary tumour. The concentration of VEGF was assessed in the plasma of 103 women with breast cancer, using an immunoenzymatic method (Quantikine test of R&D Systems).

A case of primary testicular germ cell tumor with rhabdomyosarcoma metastases as an example of applying the FISH method to diagnostic pathology.

We present the interesting case of a 38-year-old man with a primary malignant tumor of the right testis that metachronously metastasized to the urinary bladder and the stomach. Histologically, the testicular tumor was a mixed germ cell tumor composed of teratoma and embryonal carcinoma, but it also contained a sarcoma component of somatic type malignancy. Metastases showed rhabdomyoblastic differentiation histologically identical to the sarcoma component of the testicular tumor that was diagnosed as rhabdomyosarcoma.

Significance of hypoxia in uterine cervical cancer. Multicentre study.

Purpose: The aim of the study was to evaluate hypoxia markers (VEGF, GLUT-1, and HIF-1alpha) in cervical cancer tissue depending on staging (FIGO) and grading. We also analyzed the adverse effects of radiotherapy according to expression levels of hypoxic markers in the studied tissue.

Material And Methods: Expression of hypoxia-inducible factor-1alpha (HIF-1alpha), glucose transporter 1 (GLUT-1) and vascular endothelial growth factor (VEGF, also known as proangiogenic factor) were estimated in biopsy or surgical specimens from 106 patients diagnosed with uterine cervical cancer.

Evaluation of the sentinel node biopsy in colorectal carcinoma including the results of immunohistochemical examinations.

Aim: To evaluate the method and results of sentinel node biopsy including immunohistochemical examinations in resectable colorectal cancer.

Material And Methods: From April 2004 to April 2005, sentinel node biopsy was carried out with the dye method in 27 patients operated on for colorectal cancer. The standard examination of sentinel nodes consisted in the evaluation of individual H&E-dyed specimens from bisection of the node.

Angiogenesis and cardioprotection after TNFalpha-inducer-Tolpa Peat Preparation treatment in rat's hearts after experimental myocardial infarction in vivo.

The aim of the presented work was to evaluate whether short subcutaneous (s.c.) administration of TNFalpha-inducer-Tolpa Peat Preparation (TPP or TPP batch 0210) modulates the process of ischemic remodeling and spontaneous angiogenesis after experimental myocardial infarction (MI) in rats in vivo.