A phase I trial of bexarotene and docetaxel in patients with advanced solid tumors

2006 ◽  
Vol 24 (18_suppl) ◽  
pp. 13085-13085
Author(s):  
M. J. Pishvaian ◽  
K. Firozvi ◽  
J. J. Hwang ◽  
J. L. Marshall ◽  
P. Ramzi ◽  
...  

13085 Background: Retinoids have been used to treat a wide variety of malignancies. Bexarotene is a synthetic retinoid that binds preferentially to the RXR subclass of retinoid receptors. In the initial phase I trial of bexarotene, a subset of patients with non-small cell lung cancer (NSCLC) had prolonged stabilization of disease and survival. In vitro evidence suggests that the effects of retinoids may be enhanced when used in conjunction with taxanes. This is a phase I trial designed to determine the maximum tolerated dose of docetaxel in combination with a fixed dose of bexarotene. Methods: Patients with pathologically confirmed solid tumors for whom no standard therapies exist, who have an ECOG performance status ≤2, adequate organ function and normal serum triglycerides were eligible. Each cycle was 4 weeks long. Oral bexarotene was given at 400 mg/m2 daily. Docetaxel was given weekly for 3 out of 4 weeks at two dose levels, 25 or 30 mg/m2, for up to 6 cycles. For patients exhibiting disease stabilization or response, treatment with bexarotene was continued until disease progression. Restaging studies were performed after every 2 cycles. Results: To date 10 patients have been enrolled, half of whom had NSCLC - 7 male, mean age = 61 (range 37–73), 100% PS = 0 or 1. 29 cycles were completed (range 1 to 8). 7 patients have been treated at 25 mg/m2 and 3 at 30 mg/m2 of docetaxel. Hypothyroidism, hypertriglyceridemia, and fatigue were common but generally mild. Two patients experienced grade III fatigue, and 1 each experienced grade III hypertriglyceridemia, neutropenia, and cough. There were no grade IV toxicities. Two patients were taken off study because of non-fatal radiation recall pneumonitis that was controlled with steroids. In this heavily pretreated population, of 8 patients assessable for response, 5 had stable disease for at least 2 cycles. One patient with NSCLC had a partial response that persisted for 6 cycles. Conclusions: Bexarotene and docetaxel (at a minimum of 25 mg/m2) can be safely coadministered. Care should be taken in patients who have been previously irradiated. Enrolment and dose escalation for the phase I trial is still ongoing. A phase II trial of the combination as second line therapy in NSCLC is planned. [Table: see text]

2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 3570-3570 ◽  
Author(s):  
S. L. Sanborn ◽  
M. Cooney ◽  
J. Gibbons ◽  
J. Brell ◽  
P. Savvides ◽  
...  

3570 Background: Lenalidomide is a potent anti-angiogenic and immune modulating agent. This phase I trial of docetaxel and lenalidomide was undertaken to evaluate the maximal tolerated dose (MTD), dose-limiting toxicity (DLT), and secondarily, any tumor response for this novel combination. Methods: Patients with advanced solid tumors with adequate organ function were eligible. Lenalidomide was given orally days 1–14, and docetaxel was administered intravenously on day 1 of each 21-day cycle. DLT was defined as grade 3 or higher non-hematologic toxicity, grade 4 neutropenia with fever, and grade 4 anemia or thrombocytopenia. Results: Nineteen patients, 14 male and 5 female, with tumor types including prostate (7), sarcoma (3), head and neck (2), pancreatic, colon, melanoma, adenocarcinoma of unknown primary, gastric, bladder, and GIST have been enrolled. ECOG performance status was zero (10 patients) or one (9 patients). The median age was 59 years (range 35 to 86). Fourteen patients had zero or one prior treatment regimens (range 0 to 6). A total of 64 cycles have been administered (range 1 to 12). In the first nine evaluable patients, eight (89%) had grade 3 or 4 neutropenia. Docetaxel 75 mg/m2 given every 3 weeks with lenalidomide 5 mg on days 1–14 exceeded the MTD due to one grade 3 nausea/vomiting and one grade 4 neutropenia with fever. After the addition of pegfilgrastim on day 2, there has not been any neutropenia in the subsequent seven evaluable patients. Other grade 3 and 4 toxicities included leukopenia (31%), lymphopenia (19%), as well as nausea, vomiting, fatigue, anemia, infection, hyponatremia, and hypokalemia (6% each). Seven patients (44%) have had stable disease (range 3 to 12 cycles). One prostate cancer patient experienced a >95% reduction of PSA. Enrollment is ongoing and the current dose level is docetaxel 75 mg/m2, lenalidomide 10 mg days 1–14, and pegfilgrastim on day 2. Conclusions: The toxicity evaluation is ongoing. This trial will provide the MTD of docetaxel 75 mg/m2 given every 3 weeks with lenalidomide on days 1–14 in combination with pegfilgrastim support to avoid neutropenia. No significant financial relationships to disclose.


2006 ◽  
Vol 24 (18_suppl) ◽  
pp. 2053-2053 ◽  
Author(s):  
R. A. Wolff ◽  
P. M. Hoff ◽  
A. Mita ◽  
M. Fukushima ◽  
J. C. Blais ◽  
...  

2053 Background: TAS-102 consists of trifluorothymidine (FTD) and an inhibitor of thymidine phosphorylase (TP). FTD, like 5-fluorouracil, is an inhibitor of thymidylate synthase. However, when orally administered, FTD is rapidly degraded to an inactive form, primarily by TP. Co-administration of FTD with an inhibitor of TP elevates FTD concentrations. Since tumor xenograft models demonstrated greater anti-tumor activity with divided daily dosing of TAS-102, and a phase I trial of once-daily TAS-102 showed a short FTD half-life, this trial was designed to explore a three times a day dosing schedule. Methods: Patients with advanced solid tumors having received prior therapy, with adequate organ function, and performance status Zubrod 0–2, were eligible. TAS-102 was administered orally three times a day for 5 days a week for two weeks, followed by two weeks off. Courses were repeated every 4 weeks. Results: A total of 15 patients (8 female, age 37–72 years) were enrolled into the study; three at 60 mg/m2/day, 6 each at 70 mg/m2/day and 80 mg/m2/day. Nine patients had colorectal cancer, 2 carcinoma of unknown primary, 2 pancreatic cancer, one each medullary thyroid cancer and cholangiocarcinoma. Toxicity was assessed throughout all courses of therapy. Grade 3 and 4 hematological toxicities were the most common, including 3 episodes of grade 3 neutropenia at 60 mg/m2/day, 5 at 70 mg/m2/day, 5 at 80 mg/m2/day with only 1 instance of grade 3 thrombocytopenia at 80 mg/m2/day. Non-hematological grade 3 toxicities included nausea/vomiting (1 at 70 mg/m2/day), colitis, gout, and hematuria (1 each at 70 mg/m2/day), and fatigue (1 at 70 mg/m2/day and 2 at 80 mg/m2/day) Two episodes of dose-limiting toxicity were observed at 80 mg/m2/day: grade 3 fatigue and grade 4 neutropenia. Although there were no objective responses, nine patients (60%) maintained stable disease with a median duration of disease stabilization of 4.3 months (range, 1.9 to 8.6 months). Conclusions: TAS-102 is well tolerated with manageable hematologic toxicity and few non-hematological toxicities. The most common grade 3 or 4 toxicity was neutropenia. The suggested phase II dose of TAS-102 is 70 mg/m2/day when administered orally three times a day for 5 days a week for two weeks followed by two weeks off every 4 weeks. [Table: see text]


2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 15547-15547 ◽  
Author(s):  
V. J. Sinibaldi ◽  
M. A. Carducci ◽  
T. DeWeese ◽  
J. Weber ◽  
R. Drew ◽  
...  

15547 Background: Bone targeted approaches hold great promise for improving outcomes in HRPC. Docetaxel (D) and samarium 153 (Sm153 ) have individually demonstrated a clinical benefit and preclinical data strongly support biological synergism in HRPC. Preclinical data suggests that 24 hour after a dose of D, there is maximum G2M arrest. This results in the accumulation of cells in the most radiosensitive phase of the cell cycle. This phase I trial was designed to evaluate toxicity and preliminary efficacy of combined D and Sm153 administered sequentially in advanced HRPC. Methods: HRPC pts progressing after anti-androgen withdrawal; = 2 prior chemotherapy regimens; acceptable bone marrow, renal and hepatic function were eligible. Planned D treatment in 4 cohorts (N=3/cohort) includes: Cohort 1: D 50mg/m2 IV on days 1, 22, 91, and 112; cohort 2: D 75mg/m2 IV on days 1 and 22 followed by 50mg/m2 IV on days 91 and 112; cohort 3: D 75mg/m2 IV on days 1 and 22 followed by 75mg/m2 IV on days 91 and 112; cohort 4: D 75 mg/m2 IV on days 1, 22, 42, 91, 112, and 133. Sm 153 (1.0 mi/Kg) is administered IV days 2 and 92 of each cycle. Cycles are repeated Q 12 wks (max 2 cycles). The endpoint for this trial is dose limiting toxicity and maximal tolerated dose. Results: From 5/11/05 - 1/7/07 ten pts were enrolled. Median: age 69.5 yrs (range 58–76), ECOG performance status 1 (range 0–1), baseline PSA 76.65 ng/ml (range 9.6–1064 ng/ml ), prior hormonal manipulations 3 (range1–6). Three pts had prior taxotere and 3 pts had prior palliative RT. All had bone metastases and 2 also had soft tissue disease. Five pts completed 2 cycles of treatment as planned. Five pts had 1 cycle (one pt is on treatment, 3 pts had PD and 1 had prolonged grade 1 thrombocytopenia =3 wks). Nine of 10 pts had reversible grade 3 / 4 neutropenia (1 pt had reversible episode of neutropenia with fever). Seven of 7 symptomatic pts had improvement in pain. Four of 10 of pts had a 50 % decline in PSA level lasting = 4 weeks; no soft tissue disease responses. Conclusions: Our preliminary data suggest that Q 3 wk D and Q 3 month Sm153 may be administered simultaneously at full doses in extensively pretreated HRPC pts, with acceptable toxicity and significant activity. This study is supported by a grant from sanofi- aventis and Sm153 is provided by Cytogen. No significant financial relationships to disclose.


2013 ◽  
Vol 31 (15_suppl) ◽  
pp. 2569-2569
Author(s):  
Ben Kent Tomlinson ◽  
John S. Bomalaski ◽  
Monica Diaz ◽  
Taiwo Akande ◽  
Nichole Mahaffey ◽  
...  

2569 Background: ADI-PEG20 is an enzyme that degrades arginine (Arg), an amino acid relevant to biosynthetic pathways of normal and malignant cells. It has shown tolerability and activity in several solid tumors. Preclinical studies have shown that Arg deprivation by ADI-PEG 20 in cancer cells induces autophagy, caspase-independent apoptosis, and potentiates DOC-induced cytotoxicity in prostate cancer (PC) models. A phase I trial (standard 3+3 design) of ADI-PEG20 (IM weekly) plus DOC (IV on day 1 q 3 weeks) was conducted to assess feasibility and safety of the combination. Methods: Eligible pts were >18 years of age, had advanced malignant solid tumors, adequate end organ function, and performance status (PS) 0-2. ADI-PEG 20 was escalated over 4 dose levels (4.5, 9, 18, 36 mg/m2). DOC dose was 75 mg/m2. Dose limiting toxicity (DLT) was defined as any of the following in cycle 1: thrombocytopenia [grade (Gr) 3 with bleeding/transfusion, or Gr 4]; neutropenia with fever or documented infection attributable to ADI PEG20; or any ≥ Gr 3 non-heme toxicity related to study drug except alopecia. Allergic reaction associated with DOC was not considered a DLT. Serum levels of Arg were serially measured. Results: 18 pts were accrued: median age, 64.5 yrs; male, 83%; PS 0, 72%. Most common tumors were NSCLC (8), PC (3), and tongue cancer (TC) (2). Median number of prior systemic therapies was 3. One DLT was seen in dose level 1 (urticarial rash) requiring expansion of that dose level to 6 pts. No additional DLTs attributable to ADI PEG20 were seen. Serious adverse events (all expected and attributed to DOC) were recorded in 11/18 pts, including Gr IV neutropenia (6, 33%) and Gr IV anemia (2, 11%). There were 2 on-study deaths unrelated to protocol therapy. In 11 pts with evaluable disease, 1 with TC had a partial response (PR), 6 had stable disease (SD) (3 NSCLC, 2 PC, 1 TC). Arg levels decreased in the 1st cycle for 6/11 pts with available data, including 2 with SD, and 1 with PR. Conclusions: The combination of ADI PEG20 and DOC is feasible with reasonable tolerability in this heavily pre-treated cohort. Full doses of both agents were achievable: ADI-PEG 20 at 36mg/m2 with DOC 75 mg/m2. An expansion cohort of castration resistant PC pts is now accruing at this recommended dose. Clinical trial information: NCT01497925.


2006 ◽  
Vol 59 (4) ◽  
pp. 467-475 ◽  
Author(s):  
Matthew G. Fury ◽  
David B. Solit ◽  
Yungpo Bernard Su ◽  
Neal Rosen ◽  
F. M. Sirotnak ◽  
...  

2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 2561-2561
Author(s):  
S. Manda ◽  
C. Mauser ◽  
J. Bokar ◽  
M. Cooney ◽  
J. Brell ◽  
...  

2561 Background: Becatecarin (rebeccamycin analogue-RA) is an anti-tumor antibiotic with inhibitory activity against both topoisomerase II and I as well as DNA intercalating properties. We performed a phase I trial to a) determine the maximum tolerated dose (MTD) of RA in combination with oxaliplatin; b) determine the dose limiting toxicities (DLT) (c) obtain data on pharmacokinetics and (d) observe for any antitumor activity. Methods: Eligibility criteria included patients with advanced solid tumors refractory to standard therapy; performance status 0–2; adequate hematologic, renal and liver function. Patients were treated with RA as a 1 hour infusion daily x 5 and oxaliplatin on day 5 only, after RA infusion. Treatment was repeated q 21 days. The following dose levels were evaluated: Dose level 1: RA 80 mg/m2/d and oxaliplatin 90 mg/m2; Dose level 2: RA 80 mg/m2/d and oxaliplatin 130 mg/m2; Dose level 3: RA 110 mg/m2/d and oxaliplatin 130 mg/m2. Results: A total of 15 evaluable patients were enrolled. Median age was 56 (8 male, 7 female). A variety of tumor types were enrolled. A total of 56 cycles were administered. DLT occurred at a dose of RA at 110 mg/m2/d x 5 days and oxaliplatin at 130 mg/m2 and consisted of grade 3 hypophosphatemia and grade 4 atrial fibrillation. At this dose level 2 of 3 enrolled patients also developed grade 3 neutropenia. The MTD and recommended phase II dose was RA at 80 mg/m2/daily x 5 along with oxaliplatin 130 mg/m2 day 5 q 21 days. Three confirmed partial responses were observed in patients with hepatocellular, gallbladder and esophageal cancers. Six patients experienced stable disease. Conclusions: At the MTD combination RA and oxaliplatin is well tolerated and given the response rate and stable diseases observed, phase II studies are recommended. Supported by Grants U01 CA62502, MO1-RR-00080, K23 CA109348–01 from the National Institutes of Health. No significant financial relationships to disclose.


2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 7549-7549
Author(s):  
N. Hida ◽  
S. Tsujimura ◽  
T. Fujii ◽  
K. Naoki ◽  
H. Kunikane ◽  
...  

7549 Background: In cCRT for locally advanced NSCLC, full dose chemotherapy with a new agent plus a platinum doublet is considered to have unacceptable toxicities. Consequently, weekly or split chemotherapy doses are often used. However, cCRT plus conventional regimens are expected to enhance systemic effects. This phase I trial aimed to establish the MTD of cCRT plus conventional administration of DP (conv-DP). Methods: Unresectable stage III NSCLC patients (pts) (<70 years) with ECOG performance status 0–1 and adequate organ function were eligible. Pts received 60 Gy in 30 fractions by once daily radiotherapy. Concurrent P (day1; 60 mg/m2 at levels 1–3, 80 mg/m2 at level 4) and D (day1; 30 mg/m2 at level 1, 40 mg/m2 at level 2, 50 mg/m2 at levels 3–4) were given every 4 weeks for at least 2, and up to 4 courses. DLT was defined as either Gr3/4 febrile neutropenia, Gr4 neutropenia lasting ≥ 4 days, Gr4 thrombocytopenia, Gr2 pneumonitis or any Gr3 non-hematological toxicities except for nausea, vomiting and alopecia. Results: Eighteen pts were enrolled from 06/1999 to 05/2006: 6 pts at levels 2 and 4, 3 pts at levels 1 and 4; 13 males; median age 60 years (range 43–70); stage IIIA/IIIB 5/13; histology Ad/Sq/Large 9/7/2. DLTs were observed for 3 pts at level 2 (D40/P60): Gr4 pneumonitis at level 3(D50/P60), Gr3 cerebral infarction and Gr3 atrial fibrillation. Although 3 cases were added at these levels, tolerability for each level was cleared, as DLTs occurred for ≤ 2 pts among 6. MTD was not detected, even at the highest dose (D50/P80). However, dose escalation was stopped, as D60/P80 was the recommended dose for chemotherapy alone in Japan. Radiotherapy (60 Gy) was completed for 15 pts. Seventeen pts received more than 2 courses of chemotherapy. No Gr3/4 esophagitis or severe hematologic toxicities were observed. Objective response rate was 89% and 1-yr survival rate was 55%. Conclusions: The recommended dose in this regimen was D50/P80, which was near the full dose for conv-DP. Based on these promising results, we are planning a phase II trial to evaluate the efficacy and toxicity of this cCRT with conv-DP therapy. No significant financial relationships to disclose.


Blood ◽  
2007 ◽  
Vol 110 (11) ◽  
pp. 1172-1172 ◽  
Author(s):  
Donna M. Weber ◽  
Sundar Jagannath ◽  
Amitabha Mazumder ◽  
Ronald Sobecks ◽  
Gary J. Schiller ◽  
...  

Abstract Background: Vorinostat is a histone deacetylase inhibitor that has demonstrated antiproliferative and proapoptotic activity alone and in combination with the proteasome inhibitor bortezomib in preclinical multiple myeloma (MM) models. In a Phase I study, vorinostat also demonstrated modest single agent activity in patients (pts) with relapsed or refractory MM. Patients and Methods: We conducted a Phase I trial of oral vorinostat (200 mg bid or 400 mg daily × 14 days (d1–14) in combination with bortezomib 0.7 or 0.9 mg/m2 i.v. on d 4, 8, 11 and 15 or 0.9, 1.1, or 1.3 mg/m2 i.v. on d 1, 4, 8 and 11. Cycles were repeated every 21 d for a maximum of 8 cycles until progressive disease (PD) or intolerable toxicity. Pts with active relapsed or refractory MM who had not received bortezomib in the preceding 3 months and with adequate hematologic, hepatic, and renal function, and ECOG performance status of 0–2 were eligible. The primary objective was to determine the maximum tolerated dose (MTD). Activity (utilizing EBMT criteria) and safety of the combination regimen were also assessed. Results: Twenty pts have been enrolled: median age, 61 years (range 52–76), median number prior systemic therapies, 3 (range 1–14), prior therapy with bortezomib (4 pts). Eighteen pts have received ≥ 1 dose and were evaluable for safety as of 7/1/07. One pt (cohort 3) experienced a dose-limiting toxicity (DLT, Table). The MTD has not been reached. The most common drug-related toxicities of any grade were nausea (56%), thrombocytopenia (50%), diarrhea (39%), vomiting (39%), fatigue (39%), and anemia (22%). Grade ≥ 3 drug-related adverse events were thrombocytopenia (33%, none associated with bleeding), peripheral neuropathy (11%), neutropenia (11%, none associated with fever), diarrhea (6%), diverticulitis (6%), fatigue (6%), increased AST (6%), memory changes (6%), nausea (6%), vomiting (6%), and upper respiratory infection (6%). Eight pts discontinued treatment, 3 due to PD and 5 due to adverse experiences [fatigue (2), nausea (2), diverticulitis (1)]. Of 17 evaluable pts for efficacy, all had measurable response or stable disease; 4 had a partial response, 2 had a minimal response, and 11 stable disease. Among 3 evaluable pts previously treated with bortezomib, 1 achieved a partial response and 1, minimal response. Pts at the highest dose level were not yet evaluable for response. Conclusion: Although accrual continues to determine the MTD, the combination of vorinostat and bortezomib is well tolerated and effective in this group of heavily pretreated pts with refractory/relapsed MM. Table Cohort Vorinostat Dose (mg) Bortezomib Dose (mg/m2) N # of Cycles DLTs Best Response MR = minimal response; NE = not evaluable; PR = partial response; SD = stable disease. *Days 4, 8, 11 and 15. †Days 1, 4, 8 and 11. ‡Treatment cycle in progress. 1 200 0.7* 3 3, 3, 14 - SD (2), PR 2 200 0.9* 3 4, 5, 6 - SD (2), PR 3 400 0.9† 6 2, 3, 5, 6, 6, 6 Transient AST elevation SD (3), MR, PR (2) 4 400 1.1† 5 3, 3, 4, 5, 11 - SD (4), MR 5 400 1.3† 3 1‡, 1‡, 2 - NE (3)


2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 1054-1054
Author(s):  
J. J. Wheler ◽  
A. Tsimberidou ◽  
S. Moulder ◽  
M. Cristofanill ◽  
D. Hong ◽  
...  

1054 Background: Patients with metastatic breast cancer refractory to standard therapy are eligible for phase I trials. We assessed prognostic factors and clinical outcomes for patients with breast cancer in a phase I clinic focused on targeted agents. Methods: We reviewed the medical records of sequential patients with metastatic breast cancer who presented to our phase I clinic from September 2004 to May 2008. We assessed the relationship between overall survival and patients’ demographic and clinical characteristics using both univariate and multivariate (Cox proportional hazard model) analyses. Results: Ninety-two patients were identified with median age of 53 years (range 28 to 83 years). The median number of prior therapies was 5 (range 1 to 16). The median follow-up of surviving patients is 7.4 months. The median overall survival is 6.7 (95% CI: 5.2, 9.7) months. In univariate analysis, factors predicting shorter survival were elevated Ca-125 (p = 0.001) (Ca27.29 was not significant), albumin < 3.5 g/dL (p = 0.002), worsening ECOG performance status (p = 0.004), absolute neutrophil count < 7.3 x 109/L (p = 0.004), ≥ 10 prior treatment regimens (p = 0.008), ≥ 5 prior chemotherapy-only regimens (p = 0.008), body mass index (BMI) < 25 (p = 0.018), and elevated platelet counts (p = 0.007). In multivariate analysis, independent factors predicting shorter survival were ≥10 prior treatments (vs. <10 prior treatments) (HR = 3.27; 95% CI 1.37, 7.81; p = 0.0077), ECOG performance status 2–3 (vs. 0–1) (HR = 2.92; 95% CI 1.28, 6.66; p = 0.01), and albumin < 3.5 g/dL (vs. > 3.5g/dL) (hazard ratio [HR] = 2.88; 95% CI; 1.41, 5.89; p = 0.004). Of 78 patients treated on a first phase I trial, 14 (18%) demonstrated stable disease (SD), with a median duration of 18 weeks (range 10–25). Of those 19 patients treated on a second phase I trial, 6 (32%) had SD with a median duration of 12 weeks (range 8–17). Two of 4 (50%) patients treated on a third phase I trial had SD with a median duration of 20 weeks (range 16–24). Conclusions: Patients with metastatic breast cancer referred for our phase I studies had a median survival of 6.6 months. In this preliminary analysis, independent factors predicting shorter survival were ≥ 10 prior treatments, worsening ECOG performance status and low albumin levels. No significant financial relationships to disclose.


2013 ◽  
Vol 31 (15_suppl) ◽  
pp. e13521-e13521
Author(s):  
Kriti Mittal ◽  
Henry B. Koon ◽  
Paul Elson ◽  
Pierre L. Triozzi ◽  
Afshin Dowlati ◽  
...  

e13521 Background: The vascular endothelial growth factor (VEGF) antibody bevacizumab (Bev) and the VEGF receptor (VEGFR) inhibitor sunitinib are efficacious agents in many malignancies. This combination has been previously evaluated in phase I studies of advanced solid tumors. In addition to renal cell carcinoma (RCC), objective responses in the previous phase I occurred in melanoma and adrenal carcinoma. An expansion phase of the phase I study was undertaken primarily to obtain further safety data in these tumor types. Methods: Patients (pts) with metastatic solid tumors with ECOG performance status 0-1 were enrolled on a phase I trial of sunitinib (37.5 mg daily weeks 1-4) and Bev (5 mg/kg iv on days 1, 15 and 29) of a 6 week cycle. Responses were assessed by CT scans performed at baseline and every 12 weeks based on RECIST criteria v1.0. Results: Twenty-two pts were enrolled (10 males, 12 females; median age 58 years) in the expansion cohort. Tumor types included melanoma (11), RCC (5), adrenal cancer (5) and angiosarcoma (1). Prior systemic treatment included chemotherapy (41%) and immunotherapy (27%). Common all grade toxicities included fatigue (77%), hypertension (73%), thrombocytopenia (68%), nausea (59%) and oral mucositis (55%). Grade 3 or higher toxicities occurred in 15 pts (68%); including hypertension (41%), thrombocytopenia (23%) and fatigue (14%). Seven pts developed hemorrhagic events, all grade 1 or 2. Two pts experienced grade 4 thrombocytopenia, 3 RCC pts developed grade 1 thrombotic microangiopathy (TMA); while 1 melanoma patient developed decreased haptoglobin (grade 1) with associated thrombocytopenia (grade 4) and schistocytes consistent with TMA. A median of 2 cycles were completed (range, 1-8). Best response in 19 evaluable pts included partial response 21% (4/19; melanoma (2), adrenal (1), and RCC(1)); stable disease 21% (4/19) and progressive disease 58% (11/19). Overall, 6 pts (31.5%) had measurable reduction in tumor burden. Conclusions: The safety profile of Bev plus sunitinib in melanoma and adrenal carcinoma pts is similar to the previously evaluated toxicities in RCC pts. Although reversible, combined VEGF and VEGFR inhibition may lead to microangiopathy even in non-RCC pts. Clinical trial information: NCT00357318.


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