Haptoglobin Genotypes in Nasopharyngeal Carcinoma

2009 ◽  
Vol 24 (1) ◽  
pp. 32-37 ◽  
Author(s):  
Ching-Chih Lee ◽  
Hon-Yi Lin ◽  
Shih-Kai Hung ◽  
Dian-Kun Li ◽  
Hsu-Chueh Ho ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Prognostic Factor ◽  
Nasopharyngeal Carcinoma ◽  
Primary Tumor ◽  
Tumor Volume ◽  
Prognostic Significance ◽  
Chain Reaction ◽  
Primary Tumor Volume ◽  
Negative Prognostic Factor ◽  
Polymerase Chain

Aim Haptoglobin polymorphisms are associated with different cancers; however, the occurrence of nasopharyngeal carcinoma (NPC) in relation to haptoglobin polymorphisms has not been reported. In this study, the distribution of haptoglobin genotypes among patients with NPC was investigated and the prognostic significance of haptoglobin genotypes was further analyzed. Material and methods Haptoglobin genotypes were analyzed using polymerase chain reaction and electrophoresis. The genotypes were determined in the sera of 49 NPC patients and in 134 controls. Results The haptoglobin genotypes of patients with NPC were as follows: Hp 1–1, 2%; Hp 2–1, 39%; Hp 2–2, 59%. The frequency of the Hp 2–2 genotype was much higher in NPC patients than in control individuals (p=0.044). Furthermore, NPC patients with the Hp 2–2 genotype had advanced T stages (p=0.001) and larger primary tumor volumes (p=0.035) than those with Hp 2–1 or 1–1. Conclusion An increased frequency of the Hp 2–2 genotype was associated with NPC. The Hp 2 allele was also overexpressed in NPC patients. NPC patients with the Hp 2–2 genotype had advanced T stage and a larger primary tumor volume. Hp 2–2 may be a negative prognostic factor in NPC.

Primary tumor volume of nasopharyngeal carcinoma: prognostic significance for local control

2004 ◽  
Vol 59 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Wai-Man Sze ◽  
Anne W.M Lee ◽  
Tsz-Kok Yau ◽  
Rebecca M.W Yeung ◽  
Kam-Ying Lau ◽  
...  
Keyword(s):  
Nasopharyngeal Carcinoma ◽  
Local Control ◽  
Primary Tumor ◽  
Tumor Volume ◽  
Prognostic Significance ◽  
Primary Tumor Volume

Detection of circulating neoplastic cells by reverse-transcriptase polymerase chain reaction in malignant melanoma: association with clinical stage and prognosis.

1996 ◽  
Vol 14 (7) ◽  
pp. 2091-2097 ◽  
Author(s):  
B Mellado ◽  
D Colomer ◽  
T Castel ◽  
M Muñoz ◽  
E Carballo ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Malignant Melanoma ◽  
Prognostic Factor ◽  
Peripheral Blood ◽  
Clinical Stage ◽  
Melanoma Cells ◽  
Rt Pcr ◽  
Chain Reaction ◽  
Polymerase Chain ◽  
Circulating Neoplastic Cells

PURPOSE Circulating melanoma cells can be detected in peripheral blood by means of tyrosinase mRNA amplification by reverse-transcriptase polymerase chain reaction (RT-PCR). We conducted a prospective study to evaluate the clinical significance of the presence of circulating neoplastic cells in the blood of patients with malignant melanoma (MM). METHODS A sensitive RT-PCR assay was used to detect tyrosinase mRNA in the peripheral blood of patients with stages I to IV melanoma. Healthy subjects or patients with other malignancies were used as negative controls. RESULTS Ninety-one assessable patients were included in the study. There was a statistically significant association between RT-PCR positivity and clinical stage. Circulating melanoma cells were detected in 36% of patients with localized disease (stages I and II), in 45% of patients with regional nodal involvement (stage III), and in 94% of patients with metastatic disease (stage IV) (P < .001). In stage II-III patients who were RT-PCR-positive for mRNA tyrosinase in blood, the recurrence rate and disease-free survival were significantly worse than patients who were RT-PCR-negative. In multivariate analysis, RT-PCR was an independent prognostic factor for recurrence in patients with nonmetastatic disease (P = .002). CONCLUSION The detection of circulating melanoma cells in peripheral blood by RT-PCR correlated with the clinical stage of patients with melanoma and was an independent prognostic factor for recurrence. Further studies are warranted to better assess the significance of this test in the evaluation of prognosis, early detection of relapse, and in monitoring the effectiveness of systemic therapy.

Detection of Occult Melanoma Cells in Paraffin-Embedded Histologically Negative Sentinel Lymph Nodes Using a Reverse Transcriptase Polymerase Chain Reaction Assay

2001 ◽  
Vol 19 (5) ◽  
pp. 1437-1443 ◽  
Author(s):  
Giuseppe Palmieri ◽  
Paolo A. Ascierto ◽  
Antonio Cossu ◽  
Nicola Mozzillo ◽  
Maria L. Motti ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Reverse Transcriptase ◽  
Prognostic Significance ◽  
Primary Melanoma ◽  
Disease Stage ◽  
Occult Metastasis ◽  
Rt Pcr ◽  
Chain Reaction ◽  
Pcr Assay ◽  
Polymerase Chain

PURPOSE: Detection of occult metastasis before the development of clinical disease could allow more accurate staging, appropriate follow-up procedures, and adjuvant therapies in patients with malignant melanoma (MM). The sentinel lymph node (SLN) has been proposed as a reliable predictor of metastatic disease in the lymphatic basin draining the primary melanoma. In this study, we screened both paraffin-embedded SLNs and peripheral-blood (PB) samples from MM patients at various stage of disease using a multimarker reverse transcriptase polymerase chain reaction (RT-PCR) assay. The prognostic significance of the presence of PCR-positive markers was also evaluated. PATIENTS AND METHODS: Total RNA was obtained from paraffin-embedded SLN sections and PB samples of 75 MM patients. RT-PCR was performed using tyrosinase and MelanA/MART1 as melanoma-associated markers. Radiolabeled PCR products were analyzed on denaturing polyacrylamide gels. RESULTS: Good sensitivity of the RT-PCR assay on archival tissues was demonstrated after comparison of RT-PCR results on frozen and paraffin-embedded SLNs from 16 MM patients. Significant correlation between the disease stage and marker expression in both PB and SLN samples was observed; the highest value was for patients who were positive for both markers in SLN (P = .006). Progression of disease was significantly associated with the total number of PCR-positive markers in both PB (P = .034) and SLN (P = .001) samples. CONCLUSION: Although sensitivity is lowered by the use of paraffin-embedded specimens, our data indicate that RT-PCR analysis of serial sections from archival SLNs may be helpful in improving detection of occult micrometastases, thus improving staging of patients with melanoma.

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