RESUMO
PURPOSE: Sphingosine 1 phosphate (S1P), S1P receptors (S1PRs) and their signaling pathways play an important role in the fate of cancer cells. The expression pattern of S1PR subtypes (S1PR1-S1PR5) may alter in cancer development stages, depending on the origin and the pathologic features of tumors. The present study aimed to examine the relationship between plasma S1P levels and the expression of S1PR subtypes in bladder tumors. METHODS/PATIENTS: These changes were evaluated in terms of the pathologic grades and stages of human bladder cancer samples. For this, tumor biopsies from 41 new bladder cancer patients as well as 26 normal-looking bladder tissues were collected and processed for immunohistochemistry (IHC) and quantitative real-time RT-PCR of S1PR subtypes. Plasma S1P level was measured using liquid chromatography-tandem mass spectrometry (LC-MS/MS). RESULTS: The results show that tissue S1PR1, S1PR2 and S1PR3 are over-expressed in all tumors regardless of their pathological grade (~ 3, ~ 6 and ~ 104 folds, respectively). These results were corroborated by IHC data showing accumulation of S1PR subtypes 1 and 2 in the tissues. Plasma S1P in the plasma samples from patients was in the range of control samples (Controls; 256 ± 47; patients, 270 ± 41). CONCLUSIONS: Overexpression of S1PR1, S1PR2 and S1PR3 in bladder tumor biopsies which were corroborated with the pathological grades and stages may suggest that S1PR profile in tumor biopsies is a promising marker in the diagnosis of bladder carcinoma.
Assuntos
Biomarcadores Tumorais/metabolismo , Carcinoma de Células de Transição/metabolismo , Neoplasias Musculares/metabolismo , Receptores de Esfingosina-1-Fosfato/metabolismo , Neoplasias da Bexiga Urinária/metabolismo , Biomarcadores Tumorais/genética , Carcinoma de Células de Transição/genética , Carcinoma de Células de Transição/patologia , Carcinoma de Células de Transição/cirurgia , Estudos de Casos e Controles , Seguimentos , Regulação Neoplásica da Expressão Gênica , Humanos , Neoplasias Musculares/genética , Neoplasias Musculares/patologia , Neoplasias Musculares/cirurgia , Prognóstico , Receptores de Esfingosina-1-Fosfato/genética , Neoplasias da Bexiga Urinária/genética , Neoplasias da Bexiga Urinária/patologia , Neoplasias da Bexiga Urinária/cirurgiaRESUMO
OBJECTIVE: To assess the incidence of prostate adenocarcinoma in patients undergoing radical cystoprostatectomy due to bladder cancer in Iranian men. MATERIALS AND METHODS: Fifty cystoprostatectomy specimens removed due to bladder malignancy (2004-2005) at two referral centers (Shaheed Modarress and Shaheed Labbafinejad Hospitals, Tehran, Iran) were examined for the coincidental finding of prostate cancer (PCa). At the time of surgery the patient's serum PSA was less than 4 ng/mL and there were no suspicious lesions by digital rectal examination. Pathologic grade, stage, morphometric volume, number of tumor foci and association with areas of high grade prostatic intraepithelial neoplasia (HGPIN) were assessed by light microscopy. All specimens were totally embedded and whole-mounted. Clinically significant cancers were defined as tumors with >or= 0.5 mL volume, Gleason pattern 4 or 5, pT3, positive surgical margin, and multifocality > 3. RESULTS: Incidentally detected cancer was found in 7 (14%) of cystoprostatectomy specimens. HGPIN was present in 1 (14.3%) of the cystoprostatectomies with incidentally detected prostate cancer. None of cystoprostatectomies without prostate cancer had HGPIN. Four (57%) of the detected cancers were significant. CONCLUSION: We conclude that incidentally detected prostate cancer in Iran is lower than the rates reported in other countries. Further studies are warranted for better declaration of variability of prostate cancer between different ethnic groups.
Assuntos
Adenocarcinoma/diagnóstico , Antígeno Prostático Específico/sangue , Neoplasias da Próstata/diagnóstico , Neoplasias da Bexiga Urinária/cirurgia , Adenocarcinoma/complicações , Adulto , Idoso , Idoso de 80 Anos ou mais , Cistectomia , Humanos , Achados Incidentais , Irã (Geográfico) , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Estudos Prospectivos , Prostatectomia , Neoplasias da Próstata/complicações , Sensibilidade e Especificidade , Neoplasias da Bexiga Urinária/complicaçõesRESUMO
OBJECTIVE:To assess the incidence of prostate adenocarcinoma in patients undergoing radical cystoprostatectomy due to bladder cancer in Iranian men. MATERIALS AND METHODS: Fifty cystoprostatectomy specimens removed due to bladder malignancy (2004-2005) at two referral centers (Shaheed Modarress and Shaheed Labbafinejad Hospitals, Tehran, Iran) were examined for the coincidental finding of prostate cancer (PCa). At the time of surgery the patient's serum PSA was less than 4 ng/mL and there were no suspicious lesions by digital rectal examination. Pathologic grade, stage, morphometric volume, number of tumor foci and association with areas of high grade prostatic intraepithelial neoplasia (HGPIN) were assessed by light microscopy. All specimens were totally embedded and whole-mounted. Clinically significant cancers were defined as tumors with 0.5 mL volume, Gleason pattern 4 or 5, pT3, positive surgical margin, and multifocality > 3. RESULTS: Incidentally detected cancer was found in 7 (14 percent) of cystoprostatectomy specimens. HGPIN was present in 1 (14.3 percent) of the cystoprostatectomies with incidentally detected prostate cancer. None of cystoprostatectomies without prostate cancer had HGPIN. Four (57 percent) of the detected cancers were significant. CONCLUSION: We conclude that incidentally detected prostate cancer in Iran is lower than the rates reported in other countries. Further studies are warranted for better declaration of variability of prostate cancer between different ethnic groups.