[Show abstract][Hide abstract] ABSTRACT: Multimodality therapy, including preoperative chemoradiotherapy (CRT) and total mesorectal excision (TME), has effectively reduced local recurrence rates of rectal cancer over the past decade. However, the benefits and risks of the addition of neoadjuvant CRT to surgery need to be evaluated. This study was to compare the efficacy of TME with versus without preoperative concurrent chemoradiotherapy (CCRT) involving XELOX regimen (oxaliplatin plus capecitabine) in Chinese patients with stages II and III mid/low rectal adenocarcinoma.
We randomly assigned patients to the TME group (TME without preoperative CCRT) or CCRT + TME group (TME with preoperative CCRT). The primary endpoint was disease-free survival (DFS); the secondary endpoints were overall survival (OS), local and distant recurrence, tumor response to CRT, toxicity, sphincter preservation, and surgical complications. An interim analysis of the potential inferiority of DFS in the CCRT + TME group was planned when the first 180 patients had been followed up for at least 6 months.
A total of 94 patients in the TME group and 90 patients in the CCRT + TME group were able to be evaluated. The 3-year DFS and OS rates were 86.3 % and 91.5 % in the whole cohort, respectively. The 3-year DFS rates of the TME and CCRT + TME groups were 85.7% and 87.9 % (P = 0.766), respectively, and the 3-year OS rates were 90.7 % and 92.3 % (P = 0.855), respectively. The functional sphincter preservation rates of the TME and CCRT + TME groups were 71.3 % and 70.0 % (P = 0.849), respectively. In the TME group, 16 (17.0 %) patients were proven to have pTNM stage I disease after surgery. In the CCRT + TME group, 32 (35.6 %) patients achieved a pathologic complete response (pCR).
Preliminary results indicated no significant differences in the DFS, OS, or functional sphincter preservation rates between the TME and CCRT + TME groups. However, preoperative CCRT with XELOX yielded a high pCR rate. Newer techniques are needed to improve the staging accuracy, and further investigation is warranted.
Preview · Article · Jun 2015 · Ai zheng = Aizheng = Chinese journal of cancer
[Show abstract][Hide abstract] ABSTRACT: Although numerous prognostic factors have been reported for colorectal cancer liver metastasis (CRLM), few studies have reported intraoperative blood loss (IBL) effects on clinical outcome after CRLM resection.
We retrospectively evaluated the clinical and histopathological characteristics of 139 patients who underwent liver resection for CRLM. The IBL cutoff volume was calculated using receiver operating characteristic curves. Overall survival (OS) and recurrence free survival (RFS) were assessed using the Kaplan-Meier and Cox regression methods.
All patients underwent curative resection. The median follow up period was 25.0 months (range, 2.1-88.8). Body mass index (BMI) and CRLM number and tumor size were associated with increased IBL. BMI (P=0.01; 95% CI = 1.3-8.5) and IBL (P<0.01; 95% CI = 1.6-12.5) were independent OSOs predictors. Five factors, including IBL (P=0.02; 95% CI = 1.1-4.1), were significantly related to RFS via multivariate Cox regression analysis. In addition, OSOs and RFS significantly decreased with increasing IBL volumes. The 5-year OSOs of patients with IBL≤250, 250-500, and >500mL were 71%, 33%, and 0%, respectively (P<0.01). RFS of patients within three IBL volumes at the end of the first year were 67%, 38%, and 18%, respectively (P<0.01).
IBL during CRLM resection is an independent predictor of long term survival and tumor recurrence, and its prognostic value was confirmed by a dose-response relationship.
[Show abstract][Hide abstract] ABSTRACT: Our aim is to explore the trend of association between the survival rates of colorectal cancer (CRC) and the different clinical characteristics in patients registered from 1960s to 2000s. We hypothesized that the survival rate of CRC increases over time and varies according to anatomic subsites.
Information from a total of 4558 stage T(1-4)N(1-2)M0 CRC patients registered from 1960s to 2008 were analyzed. The association of CRC overall survival with age, gender, tumor locations, time, histopathology types, pathology grades, no. of examined lymph nodes, the T stage, and the N stage was analyzed. The assessment of the influence of prognostic factors on patient survival was performed using Cox's proportional hazard regression models.
From 1960 to 2008, the studied CRC patients included 2625 (57.6%) and 1933 (42.4%) males and females, respectively. These included 1896 (41.6%) colon cancers, and 2662 (58.4%) rectum cancers. The 5-year survival rate was 49%, 58%, 58%, 70%, and 77% for the time duration of 1960s, 1970s, 1980s, 1990s and 2000s, respectively. An increased 5-year survival rate was observed in the colon cancer and rectum cancer patients. Patients older than 60 years of age were more likely to develop colonic cancer (sigmoid) than rectum cancer (49.2% vs. 39.9%). The Cox regression model showed that only rectum cancer survival was related to time duration.
The overall survival and 5-year survival rates showed an increase from the 1960s to 2000s. There is a trend of rightward shift of tumor location in CRC patients.
[Show abstract][Hide abstract] ABSTRACT: To study the molecular risk factors of lymph node metastasis in stage T1 and T2 colorectal cancers by tissue microarray and immunohistochemistry techniques.
Two hundred and three patients with stage T1 and T2 colorectal carcinoma who underwent radical surgery from 1999 to 2010 in our department were included in this study. Their clinicopathological data were retrospectively analyzed. Expression of the following 14 molecular markers were selected and assayed by tissue microarray and immunohistochemistry: VEGFR-3, HER2, CD44v6, CXCR4, TIMP-1, EGFR, IGF-1R, IGF-2, IGFBP-1, ECAD, MMP-9, RKIP, CD133, MSI. Chi-squared test and logistic regression were used to evaluate the variables as potential risk factors for lymph node metastasis.
The positive expression rates of biomarkers were as following: VEGFR-3 (44.3%), EGFR (30.5%), HER-2 (28.1%), IGF-1R (63.5%), IGF-2 (44.8%), IGFBP-1 (70.9%), ECAD (45.8%), CD44v6 (51.2%), MMP-9 (44.3%), TIMP-1 (41.4%), RKIP (45.3%), CXCR4 (40.9%), and CD133 (49.8%). The positive rate of MSI expression was 22.2%. Both univariate and multivariate analyses showed that VEGFR-3, HER-2, and TIMP-1 were significant predictors of lymph node metastasis. Univariate analysis showed that CD44v6 and CXCR4 were significant significant predictors of lymph node metastasis.
VEGFR-3, HER2 and TIMP-1 are independent factors for lymph node metastasis in stage T1 and T2 colorectal cancers.
No preview · Article · Apr 2013 · Zhonghua zhong liu za zhi [Chinese journal of oncology]
[Show abstract][Hide abstract] ABSTRACT: To investigate the compliance and associated factors of postoperative chemotherapy for elderly patients with colorectal cancer.
A total of 386 elderly patients (>70 years old) with stage II(-IIII( colorectal cancer underwent surgery between January 2000 and January 2010. The clinicopathological data were retrospectively reviewed. There were 226 patients received postoperative chemotherapy and 160(41.4%) refused. Logistic regression model was used to analyze factors associated with patients compliance to chemotherapy. Patients were followed up by phone call regarding the reason for refusal.
Multivariate analysis showed that gender, body mass index (BMI), body surface area (BSA), age, and complication were independent risk factors associated with chemotherapy compliance(All P<0.05). Follow-up phone questionnaire showed that 63.8%(51/80) of patients with stage II( cancer did not received chemotherapy because of the doctor's uncertainty of chemotherapy benefit. For stage III( patients, fear of chemotherapy (31.2%, 15/48), feeling uncomfortable (18.8%, 9/48), and financial issues(18.8%, 9/48) were the main factors. The desperate feeling was the predominant reason for stage IIII( patients(56.2%, 18/32).
Gender, BSA, age, and postoperative complication are the main factors associated with compliance to postoperative chemotherapy. Doctors' recommendation should be emphasized for stage II( patients. For stage III( patients, treatment recommendation should be enthusiastic.
No preview · Article · Oct 2012 · Zhonghua wei chang wai ke za zhi = Chinese journal of gastrointestinal surgery
[Show abstract][Hide abstract] ABSTRACT: Estrogen receptor beta (ERβ) and TROP2 expressed in colon carcinoma and might play an important role there. We explored the relationship of ERβ and TROP2 expression with the prognosis of early-stage colon cancer. ERβ and TROP2 levels were assessed by immunohistochemistry in normal mucosa and tumoral tissues from 220 Chinese patients with T(3)N(0)M(0) (stage IIa) and T(4)N(0)M(0) (stage IIb) colon cancer in the Cancer Center, Sun Yat-sen University, who underwent curative surgical resection between 1995 and 2003. The Cox proportional hazards regression model was applied to analyze the overall survival (OS) data, and the ROC curve, Kaplan-Meier estimate, log rank test, and Jackknife method were used to show the effect of ERβ and TROP2 expression at different stages of cancer. The 5-year survival rates were not significantly different between the patients with stage IIa and stage IIb colon cancer (83 vs. 80 %, respectively). The high expression of ERβ was related to decreasing OS in stage IIa and stage IIb colon cancer, while the high expression of TROP2 was related to decreasing OS in stage IIb colon cancer. The expression of ERβ and TROP2 has tumor-suppressive and tumor-promoting effect in stage IIa and stage IIb colon cancer, respectively.
[Show abstract][Hide abstract] ABSTRACT: The correlation of ERβ/CD44 expression and progression of patients with stage II of colon cancer were explored in this work. A total of 220 paraffin-embedded specimens with stage II colon cancer from 1995 to 2003 were included for assessing ERβ and CD44 by immunohistochemistry in normal mucosa and tumor tissues. Kaplen-Meier method, log-rank test, and the Cox proportional hazards regression model were used to analyze the overall survival data. ROC curve was used to describe the capacity of variables in prognosis prediction. Jackknife method was used to perform cross validation of predictions. The survival rates were significantly different between the patients with high expression and low expression of CD44-tumor tissues (61 % vs. 90 %, p < 0.0001) and between the patients with high expression and low expression of ERβ-tumor tissue (99 % vs. 36 %, p < 0.0001), respectively. In addition, the interaction between expression of ERβ and CD44 was found that the impact of CD44 to the overall survive appeared only when expression of ERβ was low; and the high expression of ERβ-tumor could be regarded as a protective factor for overall survival. This study suggest that low expression of ERβ-tumor and high expression of CD44-tumor are risk factors for overall survival in patients with stage II colon cancer.
[Show abstract][Hide abstract] ABSTRACT: It is not clear if sentinel lymph node (SLN) mapping can improve outcomes in patients with colorectal cancers. The purpose of this study was to determine the prognostic values of ex vivo sentinel lymph node (SLN) mapping and immunohistochemical (IHC) detection of SLN micrometastasis in colorectal cancers.
Colorectal cancer specimens were obtained during radical resections and the SLN was identified by injecting a 1% isosulfan blue solution submucosally and circumferentially around the tumor within 30 min after surgery. The first node to stain blue was defined as the SLN. SLNs negative by hematoxylin and eosin (HE) staining were further examined for micrometastasis using cytokeratin IHC.
A total of 54 patients between 25 and 82 years of age were enrolled, including 32 males and 22 females. More than 70% of patients were T3 or above, about 86% of patients were stage II or III, and approximately 90% of patients had lesions grade II or above. Sentinel lymph nodes were detected in all 54 patients. There were 32 patients in whom no lymph node micrometastasis were detected by HE staining and 22 patients with positive lymph nodes micrometastasis detected by HE staining in non-SLNs. In contrast only 7 SLNs stained positive with HE. Using HE examination as the standard, the sensitivity, non-detection rate, and accuracy rate of SLN micrometastasis detection were 31.8% (7/22), 68.2% (15/22), and 72.2%, respectively. Micrometastasis were identified by ICH in 4 of the 32 patients with HE-negative stained lymph nodes, resulting in an upstaging rate 12.5% (4/32). The 4 patients who were upstaged consisted of 2 stage I patients and 2 stage II patients who were upstaged to stage III. Those without lymph node metastasis by HE staining who were upstaged by IHC detection of micrometastasis had a significantly poorer disease-free survival (p = 0.001) and overall survival (p = 0.004).
Ex vivo localization and immunohistochemical detection of sentinel lymph node micrometastasis in patients with colorectal cancer can upgrade tumor staging, and may become a factor affecting prognosis and guiding treatment. VIRTUAL SLIDES: The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1350200526694475.
Full-text · Article · Jun 2012 · Diagnostic Pathology
[Show abstract][Hide abstract] ABSTRACT: To explore the expression patterns of matrix metalloproteinase1 (MMP-1) in colon carcinoma and evaluate its clinical significance.
The expression of MMP-1 was detected by SP immunohistochemical method. The tissue microarray samples of 620 colon carcinoma patients were collected and the clinical data reviewed.
The positive expression rate of MMP-1 in cancer tissue was higher than that of normal tissue [72.5% (421/581) vs 30.8% (179/581), P = 0.0001]. And the difference was statistically significant (P = 0.0001). The positive rate in stages I and II [77.6% (235/303)] were higher than stages III and IV [66.9% (186/278), P = 0.0040], the former two stages showed a poor prognosis while the latter two stages a fair prognosis. The results of COX regression showed that a lower expression of MMP-1 (HR: 1.042, 95%CI: 0.770 - 1.410, P = 0.0001), tumor type (HR: 0.966, 95%CI: 0.571 - 1.633, P = 0.0150), local infiltration (HR: 0.576, 95%CI: 0.413 - 0.805, P = 0.0010) and infiltration of bowel wall (HR: 0.337, 95%CI: 0.197 - 0.575, P = 0.0001) were significant predictors of colon carcinoma.
As an independent prognostic factor of colon carcinoma, the expression of MMP-1 in cancer tissue has different prognostic implications according to various stages.
No preview · Article · Nov 2011 · Zhonghua yi xue za zhi
[Show abstract][Hide abstract] ABSTRACT: To investigate the outcome of surgical treatment for gastrointestinal stromal tumor(GIST) and the associated factors.
A total of 277 patients with GIST underwent primary surgical treatment from January 1990 to February 2010 at the Cancer Center of Sun Yat-sen University. The clinical data were retrospectively reviewed and the pathological examination was reviewed. Follow-up was performed.
There were 176 males and 101 females. The age ranged from 20 to 81 years old (median,57). Location of the tumor included colorectum (n=28),small bowel(n=76), stomach(n=173). All the patients had en bloc resection, including local excision in 98 patients, organ resection in 64, and extended resection in 115. The 5-year survival rates were 83.5%, 71.9%, and 61.9% in the three different procedures, respectively, and the difference was not statistically significant(P>0.05). Cox model showed that the tumor size, recurrence and metastasis were independent risk factors associated with the prognosis in GIST patients(P<0.05).
Surgery remains the major approach for gastrointestinal GIST. Complete resection is the principal treatment. Extensive resection or extended lymph nodes dissection is not associated with improved survival.
No preview · Article · Oct 2011 · Zhonghua wei chang wai ke za zhi = Chinese journal of gastrointestinal surgery
[Show abstract][Hide abstract] ABSTRACT: To investigate the expression of COX-2, MMP-2 and VEGF in colorectal cancer and the clinical/pathological significance.
Stage II and III colorectal cancer patients (149 cases) that received radical resection between May 2003 and November 2008 and who had complete clinical and pathological data, were recruited in this study. Expression of COX-2, MMP-2 and VEGF were detected by immunohistochemistry.
The positive rate of COX-2, MMP-2, and VEGF expression was 60.4%, 50.3% and 69.1%, respectively. COX-2 correlated with stage, lymph node metastasis, postoperative recurrence and metastasis, and survival rate; MMP-2 correlated with intestinal wall invasion, stage, number of lymph node metastasis, postoperative recurrence and metastasis, and survival rate; VEGF correlated with preoperative serum levels of CEA and CA199, postoperative recurrence and metastasis, and survival rate; the positive rate of COX-2, MMP-2 and VEGF co-expression was 32.9%, which correlated with stage, number of lymph node metastasis, preoperative serum level of CEA, postoperative recurrence and metastasis, and survival rate.
The expression of COX-2, MMP-2 and VEGF in colorectal cancer plays a synergistic promoting effect on the malignant biological behavior of tumors, which could be used as a marker to determine the malignant progression, invasion and metastasis, and prognosis of the tumor.
No preview · Article · Mar 2011 · Hepato-gastroenterology
[Show abstract][Hide abstract] ABSTRACT: Adjuvant chemotherapy for stage II colon cancer remains controversial but may be considered for patients with high-risk features. Recent studies have shown that elevated neutrophil to lymphocyte ratio (NLR) is a worse prognostic factor and a predictor of response to chemotherapy in patients with advanced colorectal cancer. The purpose of this study was to evaluate whether NLR predicts risk of recurrence in patients with stage IIA colon cancer undergoing curative resection without adjuvant chemotherapy.
We retrospectively reviewed 141 consecutive patients with stage IIA colon cancer treated with curative surgery alone from 2002 to 2006. NLR, as well as demographics, clinical, histopathologic, and laboratory data were analyzed. Univariate and multivariate analyses were conducted to identify prognostic factors associated with recurrent-free survival (RFS).
Cox's regression analysis demonstrated that elevated NLR (>4) (hazard ratio, 4.88; P < 0.01) and less lymph node sampling (<15 lymph nodes; hazard ratio, 3.80; P < 0.05) were adverse prognostic factors for RFS. The 5-year RFS was 91.4% (95% CI, 88.6-94.2%) for patients with normal NLR and 63.8% (51.1-76.3%) for patients with elevated NLR. The 5-year RFS for patients with 0, 1, and 2 of the identified risk factors was 95.1%, 87.4%, and 33.3%, respectively (P < 0.001).
Elevated preoperative NLR is an independent predictor of worse RFS for patients with stage IIA colon cancer and a potential biomarker to identify candidates for adjuvant chemotherapy.
No preview · Article · Dec 2010 · International Journal of Colorectal Disease
[Show abstract][Hide abstract] ABSTRACT: Estrogen receptor beta (ERβ) is the most highly expressed protein in patients with colon cancer. Matrix metalloproteinase 7 (MMP7) is consistently expressed throughout cancer progression. We have previously shown that endocrine therapy can inhibit MMP7 expression in colon cancer cells. In this study, we aim to identify the prognostic effects and correlation of ERβ and MMP7 in the context of colon cancer. ERβ and MMP7 levels were assessed by immunohistochemistry in normal mucosa and tumoral tissues from 423 patients with stage I-III colon cancer. The Cox proportional hazards regression model was applied to analyze the lifetime data, including overall survival (OS) and cause-specific survival (CSS). The 5-year survival rate was significantly higher in patients with high expression of nuclear ERβ than in patients with low expression (84.3% vs. 63.9%, respectively, p < 0.05). High expression of MMP7 was related to decreased OS (72% vs. 90%, respectively, p = 0.008) and 5-year survival (86.6% vs. 88.8%, respectively, p = 0.005) compared to patients with low expression of MMP7. In the subset of patients with high expression levels of tumoral nuclear ERβ, high expression of MMP7 was related to OS and CSS among colon cancer patients with high expression of ERβ. In conclusion, our results suggest that low expression of ERβ was a risk factor in colon cancer, and high expression of MMP7 was an independent prognostic factor of ERβ-positive patients with colon cancer.
[Show abstract][Hide abstract] ABSTRACT: The aim of this study was to identify risk factors of lymph node metastasis (LNM) for T2 rectal cancer.
From a prospectively maintained single-institution database, we identified 346 consecutive pT2 rectal cancers treated with total mesorectal excision from 1998 to 2009. Univariate and multivariate analyses were performed to identify risk factors associated with overall and intermediate/apical LNM. The incidence of overall and intermediate/apical LNM was analyzed by tree analysis.
Age, tumor location, pathological features, and depth of invasion were independent predictors for overall LNM. Tumor location, pathological features, and depth of invasion were independent predictors for intermediate/apical LNM. Tree analysis showed that the incidence of LNM was 7.7% for upper rectal cancer with favorable pathological features, and 3.4% for mid/lower rectal cancer without other identified risk factors. The incidence of intermediate/apical LNM was 5.7% for superficial T2 rectal cancer with favorable pathological features, and 3.1% for deep T2 rectal cancer locating in upper rectum with favorable pathological features.
Depth of invasion is an independent predictor for LNM in T2 rectal cancer. Using tree analysis, we identified a subset of patients with low risk of LNM who may be candidates of local excision.
No preview · Article · Oct 2010 · Journal of Gastrointestinal Surgery
[Show abstract][Hide abstract] ABSTRACT: To analyze the outcome of the patients with gastric gastrointestinal stromal tumor(GIST) after surgical treatment and identify the associated risk factors.
Clinical data and the tissue slices including immunohistochemistry staining of 140 patients with gastric GIST from January 1990 to December 2008 were retrospectively reviewed. SPSS 16.0 for Windows software package was used for statistical analysis.
The overall survival rates of 1-, 3-, 5-year were 96.8%, 86.7% and 79.3%, respectively. The survival rates of 1-, 3-, 5-year were 98.1%, 90.0% and 85.4% in patients who underwent complete tumor resection. But the survival rates of 1-, 3-, 5-year were 38.1%, 0 and 0 in patients with incomplete tumor resection. The differences were statistically significant (P<0.05). Gender, preoperative metastasis, tumor size,pathology type,karyokinesis, recurrence and metastasis were associated with survival rates in patients with complete tumor resection by univariate analysis. However, only tumor size, karyokinesis, recurrence and metastasis were associated with survival rates by Cox regression multivariable analysis(P<0.05).
Surgery remains the main treatment for gastric GIST. Local complete resection is the principal treatment.
No preview · Article · Jun 2010 · Zhonghua wei chang wai ke za zhi = Chinese journal of gastrointestinal surgery
[Show abstract][Hide abstract] ABSTRACT: Total mesorectal excision (TME) can reduce local recurrence and improve prognosis of rectal cancer. This study was to analyze the clinicopathologic characteristics of rectal cancer, and explore the prognosis factors of rectal cancer after radical TME.
From 1990 to 2003, 1056 rectal cancer patients had received radical TME. The impacts of 20 clinicopathologic factors on the prognosis were analyzed with univariate and multivariate method.
The 3-, 5-, and 10-year overall survival rates were 84.9% (95% CI, 83.8%-86.0%), 73.8% (95% CI, 72.4%-75.2%), and 65.1% (95% CI, 63.4%-66.8%), respectively. Univariate analysis showed that preoperative serum carcinoembryonic antigen (CEA) and CA19-9 levels, tumor gross type, pathologic type, pathologic grade, preoperative bowel obstruction or bowel perforation, T stage, N stage, and first treatment era were associated with the prognosis of rectal cancer. Multivariate analysis showed that N stage, histological type, surgical procedures, and T stage were independent prognostic factors.
N stage, histological type, surgical procedures, and T stage are independent prognostic factors for rectal cancer patients who received radical TME.
No preview · Article · Oct 2009 · Ai zheng = Aizheng = Chinese journal of cancer
[Show abstract][Hide abstract] ABSTRACT: Responses and prognosis vary in patients with colon cancer of the same stage using the same therapeutic strategy. Finding a good marker to predict the prognosis is necessary. This study was to explore the correlations of Survivin and matrix metalloproteinase-7 (MMP-7) expression to the prognosis and clinicopathologic features of colon cancer.
Clinical data of 620 colon cancer patients, treated in Sun Yat-sen University Cancer Center from January 1995 to May 2003, were analyzed. The expression of Survivin and MMP-7 in the 620 specimens of colon cancer was detected by tissue microarray and immunohistochemistry. Correlations of Survivin and MMP-7 expression to the prognosis and clinicopathologic features were analyzed.
The positive rates of survivin and MMP-7 were significantly higher in colon cancer than in normal colon mucosa (41.0% vs. 0, P<0.001; 88.8% vs. 40.9%, P<0.05). There was no relationship between Survivin expression and patients' age, sex, tumor location, gross and histological type, grade, size of colon cancer. The positive rate of Survivin was significantly higher in advanced colon cancer than in early stage colon cancer (P<0.05). There was no relationship between MMP-7 expression and all clinicopathologic factors of colon cancer. Cox untivariate and multivariate regression analyses showed that survivin and MMP-7 expression were independent factors for prognosis of colon cancer.
MMP-7 and survivin are related to the generation of colon cancer, and are independent factors for prognosis of colon cancer.
Preview · Article · Sep 2009 · Ai zheng = Aizheng = Chinese journal of cancer
[Show abstract][Hide abstract] ABSTRACT: Obesity is associated with increased risk of colorectal cancer. Many studies showed that body mass index (BMI) is related to the incidence of colon cancer. This study was to explore the relationship between BMI and colon cancer in Chinese population and provide evidences for the prevention of colon cancer.
Clinical data, including BMI, of 707 colon cancer patients and 709 healthy subjects were compared.
The mean BMI was significantly higher in colon cancer patients than in healthy subjects [(24.52+/-4.56) kg/m2 vs. (23.75+/-3.14) kg/m2, t=-3.72, P<0.001]. When stratified by sex and age, the BMI was always higher in colon cancer patients than in healthy subjects. Logistic regression analyses showed that BMI was an important risk factor of colon cancer (odds ratio=1.059, 95% confidence interval=1.029-1.090).
The occurrence of colon cancer in Chinese population is related to BMI.
Preview · Article · Sep 2009 · Ai zheng = Aizheng = Chinese journal of cancer
[Show abstract][Hide abstract] ABSTRACT: Neoadjuvant therapy (radiotherapy, RT or chemoradiotherapy, CRT) could change status of the invasion and lymph node metastasis of rectal cancer. The risk factors of lymph node metastasis in rectal cancers without neoadjuvant therapy have been well known, but those in rectal cancers treated with preoperative RT or CRT remain unclear. This study was to investigate the risk factors of lymph node metastasis in patients who underwent preoperative RT or CRT for rectal cancers.
Clinical data of 93 patients underwent preoperative RT or CRT followed by total mesorectal exesion (TME) for locally advanced rectal adenocarcinoma from August, 2003 to February, 2008 were reviewed. Twelve clinicopathologic factors and treatment-related factors were studied with univariate and multivariate analyses.
Univariate analysis showed that post-RT or post-CRT serum carcinoembryonic antigen (CEA) level, radiation dose, time interval from RT or CRT to TME, concurrent chemotherapy with oxaliplatin-containing regimens, and infiltration extent to bowel wall after RT or CRT (ypT stage) were significantly associated with lymph node status after RT or CRT (ypN stage). Multivariate analysis showed that concurrent chemotherapy with oxaliplatin-containing regimens (r=-0.481, P<0.01) and ypT stage (r=0.503, P<0.01) were independent risk factors of ypN stage.
Pathologic T stage is the most reliable predictor of lymph node stage in rectal cancer patients received preoperative RT or CRT. Oxaliplatin-containing regimens could significantly reduce the risks of lymph node metastases and potentially improve the prognosis.
Full-text · Article · Sep 2009 · Ai zheng = Aizheng = Chinese journal of cancer
[Show abstract][Hide abstract] ABSTRACT: Many studies have shown that colon cancer is an estrogen-dependent carcinoma. This study explored the efficacy of endocrine therapy in colon cancer cells with high metastatic potential (HT29). We investigated the proliferation of HT29 cells after exposure to endocrine therapy (tamoxifen) and 5-FU.
Apoptosis was evaluated using flow cytometry. The expression of matrix metalloproteinases 7 (MMP-7) and estrogen receptor beta (ERbeta) was measured by reverse transcription-polymerase chain reaction (RT-PCR) and western blot. The migration capability of treated cells was determined with wound scratch assay.
Tamoxifen alone, 5-FU alone, and the combination of the two drugs can significantly inhibit HT29 cell proliferation and migration, block the cells in G2/M phase and induce cell apoptosis. These drugs also can down-regulate MMP7 and ERbeta expression.
Our findings suggest that endocrine therapy is an efficient therapy for inhibiting ERbeta-positive colon cancer cell proliferation and migration via down-regulation of MMP7.
Preview · Article · Sep 2009 · Journal of Experimental & Clinical Cancer Research