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Immunohistochemical Evaluation of Cell Cycle Regulators: Impact on Predicting Prognosis in Stage T1 Urinary Bladder Cancer
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Molekylär och immunologisk patologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk patologi och klinisk genetik.
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Molekylär och immunologisk patologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk patologi och klinisk genetik.
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Molekylär och immunologisk patologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk patologi och klinisk genetik.
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Onkologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Centrum för hälso- och vårdutveckling, Regionalt cancercentrum.
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2012 (engelsk)Inngår i: ISRN Urology, ISSN 2090-5807, E-ISSN 2090-5815, Vol. 2012, artikkel-id 379081Artikkel i tidsskrift (Annet vitenskapelig) Published
Abstract [en]

Background and Objective. The cell cycle is regulated by proteins at different checkpoints, and dysregulation of this cycle plays a role in carcinogenesis. Matrix metalloproteinases (MMPs) are enzymes that degrade collagen and promote tumour infiltration. The aim of this study was to evaluate the expression of various cell cycle regulators and MMPs, and to correlate such expression with progression and recurrence in patients with stage T1 urothelial carcinoma of the bladder (UCB).

Patients and Methods. This population-based cohort study comprised 201 well-characterized patients with primary stage T1 urothelial carcinoma of the bladder. Immunohistochemistry was performed on formalin-fixed material to quantify expression of cell cycle regulators and two MMPs.

Results. Normal expression of p53 and abnormal expression of MMP9 were associated with greater risk of tumour recurrence. Also, normal p16 expression was related to a lower risk of tumour progression. MMP2, p21, cyclin D1, and pRb showed no significant results that could estimate progression or recurrence.

Conclusions. Normal p16 expression is associated with a lower risk of tumour progression, but immunohistochemistry on cell cycle regulators and MMPs has little value in predicting the prognosis in stage T1 UCB.

sted, utgiver, år, opplag, sider
Hindawi Publishing Corporation, 2012. Vol. 2012, artikkel-id 379081
Emneord [en]
Urinary bladder cancer, immunohistochemistry, prognostic factors, cell cycle regulators
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-85013DOI: 10.5402/2012/379081OAI: oai:DiVA.org:liu-85013DiVA, id: diva2:563579
Merknad

On the day of the defence day the status of this article was:

Manuscript

Tilgjengelig fra: 2012-10-30 Laget: 2012-10-30 Sist oppdatert: 2017-12-07bibliografisk kontrollert
Inngår i avhandling
1. Stage T1 Urinary Bladder Carcinoma: Investigation of A Population-Based Cohort
Åpne denne publikasjonen i ny fane eller vindu >>Stage T1 Urinary Bladder Carcinoma: Investigation of A Population-Based Cohort
2012 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Approximately 2 300 new cases of urinary bladder carcinoma (UBC) are diagnosed every year in Sweden. This type of cancer is characterized as a long-standing disease with a high risk of recurrence and progression from an indolent to a more aggressive course. UBC occurs in a non-muscle-invasive form (stages Ta and T1), which is treated mainly with local resection and BCG instillation, and a muscle-invasive form (stage ≥ T2), for which the treatment of choice is irradiation or cystectomy.

The aim of the research underlying this thesis was to explore the factors involved in tumor development and progression, and to find prognostic markers for recurrence and progression in patients with primary stage T1 urothelial carcinoma of the bladder (UCB).

Tumor tissue in archived paraffin blocks from patients diagnosed with that type of malignancy was used in the four studies that were conducted. This was a population-based project, because all of the patients had been reported to the cancer center in the Southeast Healthcare Region in Sweden from 1992 to 2001. The follow-up time was comparable long in the cases included and was intended to be at least 10 years.

The hospital records were reviewed to gather information on clinical characteristics of the tumors, such as size and multiplicity, as well as treatment modalities, recurrence and/or progression, and eventual death from UBC. The original tumor slides were re-evaluated. These two initial activities yielded a study population comprising 211 well-characterized patients with primary T1 UCB. Some of the originally selected patients were excluded due to missing paraffin blocks or poor quality of the tumor material, the latter being particularly important in the genetic analyses conducted in the fourth study.

Ordinary light microscopy was performed to evaluate specific tumor characteristics, such as lymphovascular tumor infiltration, and for T1 sub-staging. Immunohistochemistry was carried out to, among other things, analyze cell cycle regulators. Furthermore, pyrosequencing, single-strand conformation analysis (SSCA), and Sanger sequencing were conducted in the fourth study to assess mutations in the p53 gene and murine double minute 2 SNP309 promoter polymorphism. Statistical analyses to estimate the risk of tumor recurrence and progression were carried out in all four investigations.

Conclusions: This population-based cohort of patients with well-characterized T1 tumors of the urinary bladder showed high rates of recurrence (80%) and progression (39%), and the aggressiveness is underlined by the fact that 32% died from the disease. Lymphovascular tumor infiltration and abnormal immunohistochemical staining for p16 were found to be associated with tumor progression, and in the future analysis of these parameters might be used in treatment decisions regarding T1 bladder tumors. No other clinical or pathological variable or cell cycle regulator was associated with progression, and none of the genetic analyses conducted in the current studies were helpful in predicting outcome or explaining the mechanisms of tumor development.

sted, utgiver, år, opplag, sider
Linköping: Linköping University Electronic Press, 2012. s. 79
Serie
Linköping University Medical Dissertations, ISSN 0345-0082 ; 1335
HSV kategori
Identifikatorer
urn:nbn:se:liu:diva-85017 (URN)978-91-7519-779-1 (ISBN)
Disputas
2012-11-29, Nils-Holger salen, Hälsouniversitetet, Campus US, Linköpings universitet, Linköping, 13:00 (svensk)
Opponent
Veileder
Tilgjengelig fra: 2012-10-30 Laget: 2012-10-30 Sist oppdatert: 2019-12-10bibliografisk kontrollert

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