Abstract:
BACKGROUND:We investigated the effects of telomerase inhibition by using the reverse transcriptase inhibitor azidothymidine (AZT) in the human colorectal cancer cell line HT-29 in the presence and absence of 5-fluorouracil (5-FU). METHODS:HT-29 cells were cultured in the presence of AZT. Telomerase activity was measured by using the telomerase repeat amplification protocol. Telomere length was determined by Southern analysis. The colorimetric microtiter assay was performed to determine the cytotoxic effects of AZT, alone and in combination with 5-FU. RESULTS:The presence of 3'-azido-3'-deoxythymidine triphosphate (AZT-TP) effectively inhibited telomerase extracted from HT-29 cells. HT-29 cells cultured with 125 microM of AZT underwent fewer total population doublings over 91 days. Southern analysis revealed that telomere attrition occurred within this period. Exposure to 125 microM of AZT resulted in slightly reduced viability (10%) of HT-29 cells. However, the presence of AZT increased 5-FU cytotoxicity, suggesting that the effects of these two drugs are synergistic. CONCLUSIONS:The data are consistent with telomerase inhibition having growth-inhibitory effects in addition to those predicted to accompany loss of telomere function. Further studies using specific small-molecule inhibitors will confirm whether the growth-inhibitory and 5-FU-sensitivity effects seen here are a direct result of telomerase inhibition.
journal_name
Ann Surg Oncoljournal_title
Annals of surgical oncologyauthors
Brown T,Sigurdson E,Rogatko A,Broccoli Ddoi
10.1245/aso.2003.03.032keywords:
subject
Has Abstractpub_date
2003-10-01 00:00:00pages
910-5issue
8eissn
1068-9265issn
1534-4681journal_volume
10pub_type
杂志文章abstract:BACKGROUND:As tumor burden increases in colorectal cancer, treatment complexity progresses from colectomy to hepatectomy and lastly to cytoreductive surgery with heated intraperitoneal chemotherapy (CRS-HIPEC). The aim of this study was to evaluate whether disparities exist in the access to progressively more complex s...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-014-4220-6
更新日期:2015-05-01 00:00:00
abstract:BACKGROUND:We investigated the relationship between pathologic T-stage and mesorectal metastases after preoperative chemoradiotherapy (CRT) for clinical stage II to III rectal carcinoma. METHODS:The records of consecutive patients with clinical stage II to III carcinoma of the mid or low rectum who underwent surgery a...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/ASO.2005.03.044
更新日期:2005-02-01 00:00:00
abstract:BACKGROUND:AJCC staging of pancreatic cancer (PAC) is used to determine prognosis, yet survival within each stage shows wide variation and remains unpredictable. We hypothesized that tumor grade might be responsible for some of this variation and that the addition of grade to current AJCC staging would provide improved...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-010-1071-7
更新日期:2010-09-01 00:00:00
abstract:BACKGROUND:The differences between perihilar cholangiocarcinoma (PHCC) and distal cholangiocarcinoma (DCC) regarding recurrence and the factors that affect recurrence after surgery are unclear. This study aims to investigate the differences in recurrence patterns between patients with PHCC and those with DCC after surg...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-020-08534-2
更新日期:2020-10-01 00:00:00
abstract:BACKGROUND:Lymphadenectomy is important in the surgical treatment of apparent early epithelial ovarian cancers (eEOC); however, its extent is not well defined. We evaluated the role of systematic lymphadenectomy, the risk factors related with lymph node metastases, the implications, and the morbidity of comprehensive s...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-012-2439-7
更新日期:2012-11-01 00:00:00
abstract:BACKGROUND:In breast cancer treatment, intraoperative sentinel lymph node (SLN) evaluation is used to identify patients who may potentially benefit from immediate completion of axillary lymph node dissection. METHODS:Prospectively collected breast cancer registry data identified 516 SLN biopsies between January 2003 a...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-006-9270-y
更新日期:2007-03-01 00:00:00
abstract::The Chicago Consensus Working Group provides multidisciplinary recommendations for the management of colorectal cancer specifically as it relates to the management of peritoneal surface malignancy. These guidelines are developed with input from leading experts including surgical oncologists, medical oncologists, patho...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-020-08315-x
更新日期:2020-06-01 00:00:00
abstract:BACKGROUND:Approximately 30% of patients diagnosed with colorectal cancer (CRC) develop liver metastases. We evaluated the role of CD200, a potent immunosuppressive molecule, in colorectal liver metastases (CRLM). METHODS:We examined 110 patients who underwent curative liver resection for CRLM at our institution betwe...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-020-09471-w
更新日期:2021-01-03 00:00:00
abstract:PURPOSE:Our aim was to investigate the detrusor muscle sampling rate after monopolar versus bipolar transurethral resection of bladder tumor (TURBT). METHODS:This was a single-center, prospective, randomized, phase III trial on monopolar versus bipolar TURBT. Baseline patient characteristics, disease characteristics a...
journal_title:Annals of surgical oncology
pub_type: 杂志文章,随机对照试验
doi:10.1245/s10434-016-5700-7
更新日期:2017-05-01 00:00:00
abstract:BACKGROUND:The prognosis of biliary tract cancer (BTC) is unfavorable due to its chemoresistance. Hypoxia triggers epithelial-to-mesenchymal transition (EMT), which is closely related to drug resistance. In this study, we focused on the functional roles of procollagen-lysine, 2-oxoglutarate 5-dioxygenase 2 (PLOD2), a h...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-018-6670-8
更新日期:2018-11-01 00:00:00
abstract:BACKGROUND:Hyperthermic intraperitoneal chemotherapy (HIPEC) following cytoreductive surgery is a radical but effective treatment option for patients with peritoneal carcinomatosis (PC). Unfortunately, a standardized HIPEC protocol is missing impeding systematic comparisons with regard to minimal effective temperatures...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-015-4853-0
更新日期:2015-12-01 00:00:00
abstract:BACKGROUND:Approximately 3-5% of patients with thin (≤ 1 mm) cutaneous melanomas develop distant metastases. We sought to identify clinical and pathologic factors associated with distant metastasis and survival in a large number of patients with thin melanoma treated at a single institution. METHODS:We identified pati...
journal_title:Annals of surgical oncology
pub_type: 临床试验,杂志文章
doi:10.1245/s10434-012-2265-y
更新日期:2012-06-01 00:00:00
abstract:BACKGROUND:The prognosis of lung cancer remains poor; only 20% of patients can undergo surgery. N2 non-small cell lung cancer (NSCLC) is a heterogeneous disease. We conducted a retrospective study to analyze the impact of N2 location on survival. METHODS:This study included 342 NSCLC with N2 involvement between 1988 a...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-018-6373-1
更新日期:2018-05-01 00:00:00
abstract:BACKGROUND:Persistent/recurrent primary hyperparathyroidism (pHPT) occurs frequently in multiple endocrine neoplasia type 1 (MEN1). We assessed the usefulness of intraoperative PTH (IOPTH) and preoperative localizing studies based on the outcome of patients with MEN1-associated pHPT undergoing reoperative surgery. MET...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-016-5467-x
更新日期:2016-12-01 00:00:00
abstract:BACKGROUND:We provide a statistical analysis of the learning phase for sentinel node biopsy. METHODS:Four learning phases were analyzed: 25, 50, 75, and 150 procedures with a corresponding number of 10, 20, 30, and 60 tumor-positive cases. Critical values of nonidentification rate and false-negative rate were defined....
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1007/BF02557365
更新日期:2002-03-01 00:00:00
abstract:BACKGROUND:There is no consensus on the selection criteria for ovarian preservation in cervical cancer, and the role of neoadjuvant chemotherapy (NACT) on ovarian metastasis (OM) is also unknown. METHODS:A total of 1,889 cervical cancer patients with International Federation of Gynecology and Obstetrics (FIGO) stages ...
journal_title:Annals of surgical oncology
pub_type: 杂志文章,多中心研究
doi:10.1245/s10434-012-2632-8
更新日期:2013-03-01 00:00:00
abstract:BACKGROUND:Dermatofibrosarcoma protuberans (DFSP) is a dermal sarcoma often diagnosed by excision biopsy, and is often incompletely excised, with high recurrence rates. Traditional wide excision involves resection margins of 2-4 cm, often resulting in morbid procedures requiring surgical reconstruction. An alternative ...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-019-08011-5
更新日期:2020-03-01 00:00:00
abstract:BACKGROUND:The American Joint Committee on Cancer (AJCC)/International Union Against Cancer (UICC) staging system for gastric cancer incorporates the absolute number of metastatic lymph nodes (N status) and is optimally used when >or=15 nodes are examined. The ratio of metastatic to examined nodes (N ratio) is an effec...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-010-0914-6
更新日期:2010-05-01 00:00:00
abstract:: ...
journal_title:Annals of surgical oncology
pub_type: 评论,杂志文章
doi:10.1245/s10434-018-6894-7
更新日期:2018-12-01 00:00:00
abstract:BACKGROUND:The overall incidence of gastric cancer (GC) is higher in males than females. Specifically, signet ring cell carcinoma (SRC) is more frequently observed in younger female patients. However, limited information focused on sex-specific differences in GC has been reported. The aim of our study was to analyze cl...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-016-5448-0
更新日期:2016-12-01 00:00:00
abstract:BACKGROUND:Although the standard of care after recurrence of epithelial ovarian cancer (EOC) is chemotherapy, increasing data suggest that combining cytoreductive surgery with intraoperative hyperthermic intraperitoneal chemotherapy (HIPEC) is a promising option for patients with recurrent EOC. Our aim was to determine...
journal_title:Annals of surgical oncology
pub_type: 临床试验,杂志文章
doi:10.1245/s10434-015-4991-4
更新日期:2016-04-01 00:00:00
abstract:BACKGROUND:In our own experience over the last 15 years, the primary transpelvic vertical rectus abdominis myocutaneous (VRAM) flap is a reliable tool to prevent perineal wound complications after cylindrical excision in radical anorectal tumor surgery. To minimize the operative trauma in such patients, we performed a ...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-011-1977-8
更新日期:2012-02-01 00:00:00
abstract:BACKGROUND:Long interspersed nuclear element-1 (LINE-1) methylation status, representing global DNA methylation levels, is associated with patient prognosis in several types of cancer. This study was designed to examine the prognostic significance of LINE-1 methylation in patients with hepatocellular carcinoma (HCC) an...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-014-3874-4
更新日期:2014-12-01 00:00:00
abstract:BACKGROUND:Isolated regional failure of nasopharyngeal carcinoma (NPC) after primary treatment is traditionally treated with radical neck dissection (RND). The roles of modified radical neck dissection (MRND) and postoperative radiotherapy after salvage surgery currently remain unclear. METHODS:Medical records from ou...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-011-2018-3
更新日期:2012-03-01 00:00:00
abstract:BACKGROUND:0.6-12.7% of patients with primary cutaneous melanoma will develop additional melanomas. Pathologic features of tumors in patients with multiple primary cutaneous melanomas have not been well described. In this large, international, multicenter, case-control study, we compared the clinicopathologic features ...
journal_title:Annals of surgical oncology
pub_type: 杂志文章,多中心研究
doi:10.1245/s10434-011-2058-8
更新日期:2012-03-01 00:00:00
abstract:PURPOSE:This study was designed to determine invasive cancer upstaging rates at surgical excision following vacuum-assisted biopsy of ductal carcinoma in situ (DCIS) among women meeting eligibility for active surveillance trials. METHODS:Patients with vacuum-assisted, biopsy-proven DCIS at a single center from 2008 to...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-017-6018-9
更新日期:2017-11-01 00:00:00
abstract:BACKGROUND:Laparoscopic pancreaticoduodenectomy with venous reconstruction is not commonly performed due to its technical challenges. In this video, we focus on the technical aspects for how to perform this procedure safely. METHODS:In a 69-year-old female with jaundice and diarrhea, a computed tomography scan showed ...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-018-6762-5
更新日期:2018-12-01 00:00:00
abstract:BACKGROUND:Survival estimates following surgical resection of gastric adenocarcinoma are traditionally reported as survival from the date of surgery. Conditional survival (CS) estimates, however, may be more clinically relevant by accounting for time already survived. We assessed CS following surgical resection for gas...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-014-4116-5
更新日期:2015-02-01 00:00:00
abstract:PURPOSE:Pathologic downstaging following chemotherapy for stage III-N2 NSCLC is a well-known positive prognostic indicator. However, the predictive factors for locoregional recurrence (LRR) in these patients are largely unknown. METHODS:Between 1998 and 2008, 153 patients with clinically or pathologically staged III-N...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-012-2800-x
更新日期:2013-06-01 00:00:00
abstract:BACKGROUND:Response to neoadjuvant chemotherapy is an independent prognostic factor in locally advanced gastric cancer. However, no prospectively tested pretherapeutic parameters predicting response and/or survival in gastric cancer are available in clinical routine. METHODS:We evaluated the prognostic significance of...
journal_title:Annals of surgical oncology
pub_type: 杂志文章
doi:10.1245/s10434-012-2254-1
更新日期:2012-07-01 00:00:00