Phase II clinical trial of capecitabine in the treatment of advanced, persistent or recurrent squamous cell carcinoma of the cervix with translational research: a gynecologic oncology group study

Efficacy and Safety of Oral Metronomic Chemotherapy in Recurrent Refractory Advanced Gynaecological Cancer: An Experience From the Regional Cancer Centre of Eastern India

INTRODUCTION

The outcome of recurrent/metastatic gynaecological malignancy has drastically improved with the introduction of poly(ADP-ribose) polymerase inhibitors and immunotherapy, but the use of these drugs in routine practice is complicated due to access barriers and their high cost in developing countries. The purpose of this study is to present the clinical response, outcome and safety of oral metronomic chemotherapy (OMCT) in resource-limited, financially constrained populations.

METHODS

This is a retrospective study on patients with advanced gynaecological cancer treated at Chittaranjan National Cancer Institute, Kolkata, India, from 2021 to 2023. The patients were treated with one of these two regimens: a split-dose course of cyclophosphamide (50 mg orally once daily for 21 days) and capecitabine (500 mg twice daily continuous) or a fixed-dose combination (capecitabine 1800 mg and cyclophosphamide 80 mg orally for 14 days in every 21 days) until disease progression or unacceptable toxicities occurred. All data was captured from the hospital's medical records until June 2023. Toxicity data was reported per the Common Terminology Criteria for Adverse Events (CTCAE) v5.1, and progression-free survival (PFS) was estimated using Kaplan-Meier methods.

RESULTS

Among 34 screened patients, 10 were excluded due to noncompliance. This study analysed 24 patients with a median age at diagnosis of 56 years (IQ range 44-75). Sixteen (67%) patients were at stage IV disease with an Eastern Cooperative Oncology Group (ECOG) performance status of 3. Ovarian and cervical cancers were 80% and 20%, respectively; among them, 16 (67%) patients were platinum-refractory. Forty-two per cent of patients received three lines of chemotherapy before OMCT. A split course versus fixed dose was given to 67% versus 33% of the population; the best responses per the Response Evaluation Criteria in Solid Tumours v1.1 were complete response in 12%, partial response in 67% and stable disease in 21%. The most common toxicities were grade I anaemia (54%), grade I chemotherapy-induced nausea and vomiting (46%), grade I fatigue (42%) and grade I neutropenia (21%). Twenty-five per cent of patients were offered next-line systemic therapy after progression. The entire cohort had a median PFS of nine months (95%, CI: 5.2-12.7). Cox regression analysis identified a median PFS of 12 months (95%, CI: 6.2-17.7) among platinum-refractory groups.

CONCLUSION

OMCT was a well-tolerated, affordable regimen with durable clinical response and survival outcome (median PFS of nine months) in recurrent, refractory advanced gynaecological cancer and can be offered to patients at resource-limited centres.

Systemic therapy for advanced cervical cancer: Leveraging the historical threshold of overall survival

Cervical cancer (CC) is a worldwide problem, especially in low- and middle-income countries, where patients are often diagnosed with locally advanced disease. Until recently, all chemotherapy drugs achieved low ORR and 12-month overall survival (12- month OS) for advanced CC after failure for platinum compounds. Advances in systemic therapy with immunotherapy, targeted therapy, and antibody-drug conjugates (ADC) have leveraged the 12-month OS limit. Recently, immunotherapy (pembrolizumab) has become the standard of care in first-line advanced CC combined with platinum and taxane and in second-line after platinum doublet failure.

Capecitabine—A “Permanent Mission” in Head and Neck Cancers “War Council”?

Capecitabine, an oral pro-drug that is metabolized to 5-FU, has been used in clinical practice for more than 20 years, being part of the therapeutic standard for digestive and breast cancers. The use of capecitabine has been evaluated in many trials including cases diagnosed in recurrent or metastatic settings. Induction regimens or a combination with radiation therapy were evaluated in head and neck cancers, but 5-FU still remained the fluoropyrimidine used as a part of the current therapeutic standard. Quantifications of levels or ratios for enzymes are involved in the capecitabine metabolism to 5-FU but are also involved in its conversion and elimination that may lead to discontinuation, dose reduction or escalation of treatment in order to obtain the best therapeutic ratio. These strategies based on biomarkers may be relevant in the context of the implementation of precision oncology. In particular for head and neck cancers, the identification of biomarkers to select possible cases of severe toxicity requiring discontinuation of treatment, including “multi-omics” approaches, evaluate not only serological biomarkers, but also miRNAs, imaging and radiomics which will ensure capecitabine a role in both induction and concomitant or even adjuvant and palliative settings. An approach including routine testing of dihydropyrimidine dehydrogenase (DPD) or even the thymidine phosphorylase (TP)/DPD ratio and the inclusion of miRNAs, imaging and radiomics parameters in multi-omics models will help implement “precision chemotherapy” in HNC, a concept supported by the importance of avoiding interruptions or treatment delays in this type of cancer. The chemosensitivity and prognostic features of HPV-OPC cancers open new horizons for the use of capecitabine in heavily pretreated metastatic cases. Vorinostat and lapatinib are agents that can be associated with capecitabine in future clinical trials to increase the therapeutic ratio.

Capecitabine in treating patients with advanced, persistent, or recurrent cervical cancer: an active and safe option?

Introduction: Advanced, persistent or recurrent cervical cancer in patients not amenable to curative surgery or radiotherapy predicts a dismal prognosis. Systemic chemotherapy based on paclitaxel/cisplatin ± bevacizumab is the current standard of care. However, once progression occurs, the possibility of alternative treatment options is very limited.Areas covered: The usefulness of capecitabine has been well-established against several cancer types, including head and neck, breast, and colorectal cancer. This review covers current literature evidence on the clinical efficacy and safety of capecitabine in cervical cancer treatment, either as monotherapy or combined with other agents or chemo-radiotherapy.Expert opinion: Recent clinical data, albeit scant, suggested a promising role for capecitabine both as monotherapy in patients with platinum-resistant cervical cancer and in combination with cisplatin in chemotherapy-naïve patients with metastatic or recurrent cervical cancer. In our opinion, capecitabine, especially in combination regimens, could represent a valid treatment option and further research is warranted to better understand its effectiveness in these challenging patients.

Capecitabine in patients with platinum-pretreated advanced or recurrent cervical carcinoma: a retrospective study

Background

Cervical cancer is a common malignancy among women and, when recurring, presents a dismal prognosis. After platinum failure, second-line treatments report response rates ranging from 3–15%, a median progression-free survival of about 3 months and a median overall survival of about 5.5 months.

To retrospectively evaluate the activity and safety of capecitabine in patients with advanced/recurrent cervical carcinoma.

Methods

A retrospective review of medical records of recurrent cervical cancer patients, who had failed a previous platinum–paclitaxel treatment and received oral capecitabine 1250 mg/m2 twice daily continuously from day 1 to day 14 every 21 days, was performed from December 2013 to March 2018 at the Gynecologic Oncology Unit of the Fondazione IRCCS National Cancer Institute of Milan, Italy. The response rate was evaluated every three cycles according to Response Evaluation Criteria In Solid Tumors (RECIST) version 1.1 criteria. Common Terminology Criteria for Adverse Events version 4.0 were used to evaluate adverse events.

Results

We retrospectively analyzed 35 patients with recurrent cervical carcinoma, treated with oral capecitabine. All patients had previously received and failed a combination of carboplatin plus paclitaxel as first-line therapy for advanced/recurrent disease. Median age at the first capecitabine administration was 53 years (range 27–82). All patients were evaluable for response: the overall response rate was 34.2% (2.8% complete responses and 31.4% partial responses) with a clinical benefit rate of 57% (overall response rate plus 22.8% stabilizations of disease). The most common grade 1–2 adverse events per patient were fatigue (71.3%), hand-foot syndrome (57.0%), diarrhea (31.3%), constipation (17.0%), and nausea (10.4%). Only three patients (8.5%) reported grade 3 adverse events.

Conclusions

Our data suggest that oral capecitabine should be considered an active and safe treatment in patients with recurrent cervical carcinoma after platinum failure. Based on these results, we consider capecitabine as warranting further clinical evaluation.

The combination of cisplatin and topotecan as a second-line treatment for patients with advanced/recurrent uterine cervix cancer

We retrospectively reviewed outcomes of treatments with cisplatin and topotecan in patients with previously-treated uterine cervix cancer.We analyzed the medical records of patients with advanced (stage IVB) or recurrent or persistent squamous or non-squamous cell carcinoma of the cervix, who were treated with cisplatin and topotecan as a second-line chemotherapy between January 2000 and December 2015. The patients were treated with a combination of cisplatin (50 mg/m for 1 day) and topotecan (0.75 mg/m for 3 days) once every 3 weeks. Treatment response, progression-free survival (PFS), and overall survival (OS) were analyzed in all patients and between responder and non-responder groups (responders showed at least a partial response to prior systemic chemotherapy).Thirty-nine patients with a median age of 47 years (range, 32-73 years) were treated with cisplatin and topotecan. The median PFS was 4.6 months (95% confidence interval [CI], 1.2-7.9 months) and the median OS was 14.1 months (95% CI, 10.0-18.2 months). The overall response rate (ORR) was 30.8%, and the disease control rate was 56.4%. The ORR was significantly better in the responder group compared with the non-responder group (50.0% vs 10.5%; P = .008). All patients reported some grade of hematological toxicity. The most frequently encountered toxicity was anemia, with a rate of 59.7% for any grade and 13.2% for grade 3 or 4.The combination of cisplatin and topotecan was effective as second-line chemotherapy in patients with advanced/recurrent uterine cervix cancer.

Weekly Versus Triweekly Cisplatin-Based Chemotherapy Concurrent With Radiotherapy in the Treatment of Cervical Cancer: A Meta-Analysis

Background

The aim of this study was to evaluate toxicity, compliance, recurrence and the survival of weekly and triweekly cisplatin-based concomitant chemoradiation in treatment of cervical cancer.

Materials and Methods

The databases were searched from 1995 until 2015 to identify eligible studies on weekly versus triweekly cisplatin chemoradiotherapy. The data were analyzed by RevMan 5.3 software.

Results

A total of 5 randomized controlled trials were included in this review. Weekly cisplatin regimen significantly reduced the incidence of Hematologic toxicity. However, there was no significantly different between the 2 arms in compliance, recurrence and the survival rate (allP>0.05).

Conclusions

Weekly cisplatin regimen had the similar therapeutic effect as the triweekly cisplatin regimen but with less hematologic toxicity. Therefore, we recommend the weekly cisplatin 30 to 40 mg/m2chemoradiotherapy as the strong candidate for the optimal cisplatin dose and dosing schedule in the treatment of locally advanced cervical cancer.

The role of pharmacogenetics in capecitabine efficacy and toxicity

Capecitabine is an oral prodrug of 5-fluorouracil (5-FU) and approved for treatment of various malignancies. Hereditary genetic variants may affect a drug's pharmacokinetics or pharmacodynamics and account for differences in treatment response and adverse events among patients. In this review we present the current knowledge on genetic variants, commonly single-nucleotide polymorphisms (SNPs), tested in cohorts of cancer patients and possibly useful for prediction of capecitabine efficacy or toxicity. Capecitabine is activated to 5-FU by CES, CDA and TYMP, of which SNPs in CDA and CES2 were found to be associated with efficacy and toxicity. In addition, variants in genes of the 5-FU metabolic pathway, including TYMS, MTHFR and DPYD also influenced capecitabine efficacy and toxicity. In particular, well-known SNPs in TYMS and DPYD as well as putative DPYD SNPs had an association with clinical outcome as well as adverse events. Inconsistent findings may be attributable to factors related to ethnic differences, sample size, study design, study endpoints, dosing schedule and the use of multiple agents. Of the SNPs described in this review, dose reduction of fluoropyrimidines based on the presence of DPYD variants ^*2A (rs3918290), ^*13 (rs55886062), -2846A>T (rs67376798) and -1236G>A/HapB3 (rs56038477) has already been recommended. Other variants merit further validation to establish their definite role in explanation of interindividual differences in the outcome of capecitabine-based therapy.

Clinical usefulness of the oral chemotherapy agent S-1 in heavily pre-treated patients with advanced or recurrent cervical cancer

PURPOSE

Our aim was to evaluate the efficacy and safety of S-1 in heavily pre-treated patients with advanced (FIGO stage IVB) or recurrent cervical cancer.

METHODS

The Institutional Review Board of our hospital approved the protocol for this retrospective phase II study. Patients with measurable disease received two oral doses of S-1 (35 mg/m(2)) daily for 4 weeks of a 6-week cycle or 2 weeks of a 3-week cycle. The antitumor effect, time to progression, overall survival, and adverse events were investigated.

RESULTS

We retrospectively analyzed relevant data of 28 patients with advanced or recurrent cervical cancer. Twenty-two patients had prior chemotherapy (not including chemoradiotherapy) and 27 had prior radiotherapy. The median number of prior chemotherapy regimens and cycles was 2 (range 0-4) and 7 (range 0-35), respectively. Two patients (7.1%) had partial response, and 10 patients (35.7%) had stable disease. Ten patients (35.7%) discontinued the therapy because of progressive disease. The response in 5 patients could not be evaluated because of termination of treatment in the middle of the first cycle. The disease control rate was 42.8%. After a median follow-up duration of 7.5 months, the median time to progression was 4.2 months (95% CI 2.7-5.4) and the median overall survival was 9.92 months (95% CI 9.20-NA). The two patients with partial response had received less prior chemotherapy.

CONCLUSIONS

Oral S-1 in palliative chemotherapy is a useful and well-tolerated treatment in heavily pre-treated patients with advanced or recurrent uterine cervical cancer.

The effect of chemotherapy or radiotherapy on thymidine phosphorylase and dihydropyrimidine dehydrogenase expression in cancer of the uterine cervix

OBJECTIVE

Levels of 5-FU metabolic or related enzymes, particularly thymidine phosphorylase (TP) and dihydropyrimidine dehydrogenase (DPD), have been investigated in various cancer types, including uterine cervical cancer. Intratumoral TP levels have been reported to increase in response to several chemotherapeutic agents or irradiation in both xenografts and clinical studies. In cervical cancer, however, only a few studies about changes in TP and DPD expression associated with cancer treatment have been published. We evaluated the effect of chemotherapy and/or irradiation on TP and DPD expression in cervical squamous cell carcinoma.

STUDY DESIGN

Of 27 patients in this study, 12 patients underwent neoadjuvant chemotherapy consisting of nedaplatin, ifosfamide, and/or peplomycin followed by radical surgery, and 15 patients underwent radiotherapy (n=8) or chemoradiotherapy with nedaplatin (n=7) as initial treatment. Tumor specimens were obtained from biopsies acquired before treatment and after administration of chemotherapy (2 weeks after the first and second cycles), and after irradiation with 10 Gy, 20 Gy, and 30 Gy. These specimens were used to measure TP and DPD levels by ELISA.

RESULTS

In the 12 patients who received neoadjuvant chemotherapy, intratumoral TP and DPD levels did not change. In contrast, in the 15 patients who underwent radiotherapy or chemoradiotherapy with nedaplatin, TP or DPD expression appeared to be slightly increased or decreased, respectively, after irradiation with 20 Gy, and consequently the TP/DPD ratio was significantly higher after irradiation with 20 Gy than before irradiation.

CONCLUSIONS

These results suggest a clinical advantage of chemoradiotherapy with capecitabine or doxyfluridine over radiotherapy alone via the elevation of the TP/DPD ratio in cervical squamous cell carcinoma. However, no advantage of combination chemotherapy with these 5-FU derivatives was demonstrated. Therefore, further evaluation with a larger number of patients or with other chemotherapeutic agents is required to confirm these observations.

Management of recurrent cervical cancer: a review of the literature

OBJECTIVE

The aim of this narrative review is to update the current knowledge on the treatment of recurrent cervical cancer based on a literature review.

MATERIAL AND METHODS

A web based search in Medline and CancerLit databases has been carried out on recurrent cervical cancer management and treatment. All relevant information has been collected and analyzed, prioritizing randomized clinical trials.

RESULTS

Cervical cancer still represents a significant problem for public health with an annual incidence of about half a million new cases worldwide. Percentages of pelvic recurrences fluctuate from 10% to 74% depending on different risk factors. Accordingly to the literature, it is suggested that chemoradiation treatment (containing cisplatin and/or taxanes) could represent the treatment of choice for locoregional recurrences of cervical cancer after radical surgery. Pelvic exenteration is usually indicated for selected cases of central recurrence of cervical cancer after primary or adjuvant radiation and chemotherapy with bladder and/or rectum infiltration neither extended to the pelvic side walls nor showing any signs of extrapelvic spread of disease. Laterally extended endopelvic resection (LEER) for the treatment of those patients with a locally advanced disease or with a recurrence affecting the pelvic wall has been described.

CONCLUSIONS

The treatment of recurrences of cervical carcinoma consists of surgery, and of radiation and chemotherapy, or the combination of different modalities taking into consideration the type of primary therapy, the site of recurrence, the disease-free interval, the patient symptoms, performance status, and the degree to which any given treatment might be beneficial.

Randomized clinical trial of weekly vs. triweekly cisplatin-based chemotherapy concurrent with radiotherapy in the treatment of locally advanced cervical cancer

PURPOSE

To compare compliance, toxicity, and outcome of weekly and triweekly cisplatin administration concurrent with radiotherapy in locally advanced cervical cancer.

METHODS AND MATERIALS

In this open-label, randomized trial, 104 patients with histologically proven Stage IIB-IVA cervical cancer were randomly assigned by a computer-generated procedure to weekly (weekly cisplatin 40 mg/m(2), six cycles) and triweekly (cisplatin 75 mg/m(2) every 3 weeks, three cycles) chemotherapy arms during concurrent radiotherapy. The difference of compliance and the toxicity profiles between the two arms were investigated, and the overall survival rate was analyzed after 5 years.

RESULTS

All patients tolerated both treatments very well, with a high completion rate of scheduled chemotherapy cycles. There was no statistically significant difference in compliance between the two arms (86.3% in the weekly arm, 92.5% in the triweekly arm, p > 0.05). Grade 3-4 neutropenia was more frequent in the weekly arm (39.2%) than in the triweekly arm (22.6%) (p = 0.03). The overall 5-year survival rate was significantly higher in the triweekly arm (88.7%) than in the weekly arm (66.5%) (hazard ratio 0.375; 95% confidence interval 0.154-0.914; p = 0.03).

CONCLUSIONS

Triweekly cisplatin 75-mg/m(2) chemotherapy concurrent with radiotherapy is more effective and feasible than the conventional weekly cisplatin 40-mg/m(2) regimen and may be a strong candidate for the optimal cisplatin dose and dosing schedule in the treatment of locally advanced cervical cancer.

Phase II study of S-1, an oral fluoropyrimidine, in patients with advanced or recurrent cervical cancer

Background: S-1 is an oral fluoropyrimidine. This phase II study was designed to evaluate the efficacy and safety of S-1 in patients with advanced or recurrent uterine cervical cancer.

Patients and methods: S-1 35 mg/m² was given twice daily for 28 days repeated every 6 weeks. Eligible patients were women aged 20–74 years, who had Eastern Cooperative Oncology Group performance status of zero or one, who had stage IVB or recurrent uterine cervical cancer, and who had received no more than one platinum-containing chemotherapy regimen for stage IVB or recurrent disease. The primary end point was overall response rate (ORR) determined by RECIST.

Results: A total of 37 patients were enrolled in the trial and 36 were eligible. The median number of cycles administered was 4. The confirmed ORR was 30.6% (95% confidence interval 15.5% to 45.6%). The response rate for patients who had received platinum-based treatment including chemoradiotherapy was 31.8% (7 of 22). After a median follow-up duration of 25 months, the median time to progression and the median survival time were 5.2 and 15.4 months, respectively. The most frequent grade 3 or 4 adverse events were anemia (16%), anorexia (16%), and diarrhea (22%).

Conclusions: This phase II study of S-1 in cervical cancer suggests a promising response rate and a contribution toward prolonging survival, with modest toxic effects. Phase III studies of S-1 in patients with advanced or recurrent cervical cancer are thus warranted.

Phase II Trial of Capecitabine and Cisplatin in Advanced, Persistent, or Recurrent Carcinoma of the Cervix

Purpose:

Platinum-based drugs are the most active agents in cervical carcinoma. The aim of this study was to assess the activity and toxicity of the association of cisplatin and capecitabine as first-line treatment in patients with advanced, persistent, or recurrent carcinoma of the cervix.

Patients and Methods:

Patients with histological proven primary carcinoma, presence of measurable tumors, age 18 years or older, performance status of 2 or less, and adequate bone marrow, renal, and hepatic functions were potentially eligible for this trial. Prior chemotherapy was allowed only in the context of radiosensitization. Treatment consisted of 50 mg/m2of intravenous cisplatin on day 1 with 2500 mg/m2oral capecitabine daily in 2 divided doses for 14 consecutive days in 21-day cycles. Responses were assessed using response evaluation criteria in solid tumors.

Results:

Between November 2004 and October 2007, 22 women were entered into the trial. Median age was 51 years (range, 37-70 years). Seventeen patients had prior radiotherapy, and 13 received a radiation sensitizer, whereas 2 patients underwent surgery exclusively and 3 patients had no prior treatment. A median of 5 cycles was administered (range, 2-8 cycles). There were one septic death, one grade 4 neutropenia, and one grade 4 anemia. Grade 3 fatigue, gastrointestinal toxicity, renal toxicity, and hand-foot syndrome were seen in 31.8%, 22.7%, 9%, and 9% of the patients, respectively. There were 1 complete response and 6 partial responses for an overall response rate of 31.8%. Seven patients (31.8%) each had stable disease, and 8 patients showed progression. The median time to progression was 7.6 months, with a median overall survival of 20 months.

Conclusion:

These results seem to suggest that the capecitabine-cisplatin combination is a moderately tolerated and active regimen in advanced, persistent, or recurrent cervical carcinoma patients. Further evaluation of this drug combination may be warranted.

Pharmacotherapy of cervical cancer

IMPORTANCE OF THE FIELD

Cervical cancer (CC) remains an important health problem. It is the second most frequent malignancy in women worldwide, with one-third of patients dying from pharmacoresistant disease.

AREAS COVERED IN THIS REVIEW

We reviewed pharmacotherapy approaches in the medical and multidisciplinary management of CC and conducted a systematic search of Pubmed for clinical trials, reviews and meta-analysis published in the last 20 years. Abstracts of the American Society of Clinical Oncology, European Society of Gynecological Oncology and International Gynecologic Cancer Society were also searched, together with the US National Institutes of Health clinical trial database.

WHAT THE READER WILL GAIN

The state-of-the art of cytotoxic and biologically targeted therapies in early, locally advanced and metastatic/recurrent CC is discussed.

TAKE HOME MESSAGE

Until recently, the role of pharmacotherapy in CC was restricted to palliation of advanced/metastatic or recurrent disease. During the past two decades, this reluctant attitude towards chemotherapy has been modified after a series of randomized trials demonstrated its beneficial contribution as an adjunct to radiotherapy or surgery in early and locally advanced CC. Moreover, new combinations of cytotoxics, together with novel molecular target agents, open new perspectives in the treatment of primary and recurrent CC.

Phase II evaluation of capecitabine in refractory nonsquamous cell carcinoma of the cervix: a Gynecologic Oncology Group Study

We conducted a multi-institutional study to assess the activity and toxicity of capecitabine in patients with persistent or recurrent nonsquamous cancer of the cervix. Eligible patients were required to possess adequate renal, hepatic and bone marrow function and a Gynecologic Oncology Group performance status of 0-2. Histologic confirmation of the original primary cancer was mandated. Patients must have received one prior systemic chemotherapeutic regimen for cervical cancer that did not include the chemotherapy that may have been administered in conjunction with prior radiation therapy. The initial dose schedule was 2500 mg/m2 orally daily in two divided doses for 14 consecutive days, followed by a 7-day rest, such that each cycle was 21 days. Responses were assessed using response evaluation criteria in solid tumors. Twenty-one patients were entered into the trial. One patient was declared ineligible for wrong cell type; thus, 20 were evaluable for toxicity. A median of 2.5 cycles was administered (range 1-11). There was one septic death. Grade 4 neutropenia, renal, neurologic, and pulmonary toxicity was seen in 5%, 5%, 5%, and 10% patients, respectively. There were no responses. Nine patients (45%) each had stable disease and nine showed progression. The remaining two cases (10%) did not have subsequent disease assessment and response could not be assessed. Oral capecitabine at the dose and schedule tested has insignificant activity in nonsquamous cervical cancer patients previously treated with chemotherapy.

Evaluation of pemetrexed (Alimta, LY231514) as second line chemotherapy in persistent or recurrent carcinoma of the cervix: a phase II study of the Gynecologic Oncology Group

OBJECTIVE

To estimate the anti-tumor activity of pemetrexed in patients with advanced or recurrent carcinoma of the cervix that failed on higher priority treatment protocols and to determine the nature and degree of toxicity.

METHODS

A multicenter Phase II trial was conducted by the Gynecologic Oncology Group (GOG). Patients must have had advanced or recurrent measurable carcinoma of the cervix, and failed one prior chemotherapy regimen. Pemetrexed at a dose of 900 mg/m(2) was to be administered as an IV infusion over 10 min every 21 days.

RESULTS

From July 6, 2004 to April 3, 2006, twenty-nine patients were entered by ten member institutions of the GOG. Two patients did not receive treatment and thus were inevaluable. A total of 128 cycles were administered with 37% of patients receiving six or more cycles. The treatment was well tolerated overall. More serious toxicities (grade 3 and 4) included anemia in 41%, leukopenia in 30%, neutropenia in 26%, and infection in 26%. No treatment related deaths were reported. Four patients (15%) had partial responses with a median response duration of 4.4 months. The response rate for non-radiated or radiated disease sites was 25% and 7% respectively. Sixteen patients (59%) had stable disease and seven (26%) patients had increasing disease. Median progression free survival (PFS) was 3.1 months and overall survival (OS) was 7.4 months.

CONCLUSION

Pemetrexed at this dose and schedule showed moderate activity against advanced or recurrent cervical cancer that has failed prior chemotherapy. Data from other tumor sites has suggested synergy between pemetrexed and cisplatin and should be considered for further study.