A multidisciplinary approach to address unmet needs in the management of patients with non-metastatic castration-resistant prostate cancer.

BACKGROUND: With the availability of second-generation androgen receptor inhibitors (SGARIs), the treatment landscape has changed dramatically for patients with nonmetastatic castration-resistant prostate cancer (nmCRPC). In clinical trials, the SGARIs (apalutamide, enzalutamide, darolutamide) increased metastasis-free survival (MFS), overall survival (OS), and patient quality of life compared to placebo. These drugs were subsequently integrated into nmCRPC clinical practice guidelines. With advances in radiographic imaging, disease assessment, and patient monitoring, nmCRPC strategies are evolving to address limitations related to tracking disease progression using prostate-specific antigen (PSA) kinetics. METHODS: A panel of 10 multidisciplinary experts in prostate cancer conducted reviews and discussions of unmet needs in the management and monitoring of patients with nmCRPC in order to develop consensus recommendations. RESULTS: Across the SGARI literature, patient MFS and OS are generally comparable for all treatments, but important distinctions exist regarding short- and long-term drug safety profiles and drug-drug interactions. With respect to disease monitoring, a substantial proportion of patients using SGARIs may experience disease progression without rising PSA levels, suggesting a need for enhanced radiographic imaging in addition to PSA monitoring. Recent data also indicate that novel prostate-specific membrane antigen positron emission tomography radiotracers provide enhanced accuracy for disease detection, as compared to conventional imaging. CONCLUSIONS: Clinical decision-making in nmCRPC has become more complex, with new opportunities to apply precision medicine to patient care. Multidisciplinary teams can ensure that patients with nmCRPC receive optimal and individualized disease management.

Cabozantinib Safety With Different Anticoagulants in Patients With Renal Cell Carcinoma.

BACKGROUND: In patients with renal cell carcinoma (RCC) on cabozantinib, venous thromboembolism (VTE) management remains challenging due to limited safety data regarding direct oral anticoagulants (DOACs) use in conjunction with cabozantinib. We investigated the safety of cabozantinib with different anticoagulants in patients with RCC. METHODS: In this retrospective multicenter study (9 sites), patients with advanced RCC were allocated into 4 groups: (1) cabozantinib without anticoagulation, cabozantinib with concomitant use of (2) DOACs, (3) low molecular weight heparin (LMWH), or (4) warfarin. The primary safety endpoint was the proportion of major bleeding events (defined per International Society on Thrombosis and Hemostasis criteria). The primary efficacy endpoint was the proportion of new/recurrent VTE while anticoagulated. RESULTS: Between 2016 and 2020, 298 patients with RCC received cabozantinib (no anticoagulant = 178, LMWH = 41, DOAC = 64, and warfarin = 15). Most patients had clear cell histology (78.5%) and IMDC intermediate/poor disease (78.2%). Cabozantinib was first, second, or ≥ third line in 21.8%, 31.9%, 43.3% of patients, respectively. Overall, there was no difference in major bleeding events between the no anticoagulant, LMWH, and DOAC groups (P = .088). Rate of new/recurrent VTE was similar among anticoagulant groups. Patients with a VTE had a statistically significantly worse survival than without a VTE (HR 1.48 [CI 95% 1.05-2.08, P = .02]). CONCLUSION: This real-world cohort provides first data on bleeding and thrombosis complications in patients with RCC treated with cabozantinib with or without concurrent anticoagulation. DOACs appear safe for VTE treatment for patients with RCC on cabozantinib, but optimized anticoagulation management, including individualized risk-benefit discussion, remains important in clinical practice.

Immune-related adverse events and kidney function decline in patients with genitourinary cancers treated with immune checkpoint inhibitors.

BACKGROUND: In patients with genitourinary cancers, the effect of immune checkpoint inhibitors (ICIs) on kidney function is unknown. PATIENTS AND METHODS: This is a retrospective cohort study of patients with renal cell carcinoma (RCC) and urothelial carcinoma who received ICIs at two major cancer centers between 2012 and 2018. Cumulative incidence and Fine and Gray subdistribution hazard models were performed to determine predictors of the co-primary outcomes, (1) acute kidney injury (AKI) and (2) sustained estimated glomerular filtration rate (eGFR) loss, defined as a >20% decline in eGFR sustained ≥90 days. We also determined the association between immune-related adverse events (irAE) and adverse kidney outcomes among patients surviving ≥1 year. RESULTS: 637 patients were included; 320 (50%) patients had RCC and 317 (50%) patients had urothelial carcinoma. Half of the cohort had eGFR<60 mL/min/1.73 m2 at baseline. irAEs, AKI, and sustained eGFR loss were common, occurring in 33%, 25% and 16%, respectively. Compared to patients with urothelial carcinoma, patients with RCC were more likely to develop irAEs (aHR 1.61, 95% CI 1.20-2.18) and sustained eGFR loss (aHR 1.97, 95% CI 1.24-3.12), but not AKI (aHR 1.53, 95% CI 0.97-2.41). Among patients surviving ≥1 years, experiencing a non-renal irAE was associated with a significantly higher risk of sustained eGFR loss (aHR 1.71, 95% CI 1.14-2.57). CONCLUSION: AKI and sustained eGFR loss are common in patients with genitourinary cancers receiving ICIs. irAEs may be a novel risk factor for kidney function decline among patients receiving ICIs.

Comparison of Equations To Estimate Glomerular Filtration Rate and Their Impact on Frequency of Cisplatin-associated Acute Kidney Injury.

Background: Accurate estimation of kidney function is essential for patient selection and drug dosing in patients with cancer. eGFR equations are necessary for decision making and monitoring. Our aim was to identify which of these equations-estimated creatinine clearance (eCrCl) by Cockcroft-Gault (CG), eGFR by Modification of Diet in Renal Disease (eGFRMDRD), CKD Epidemiology Collaboration (eGFRCKD-EPI) or the recently proposed Janowitz-Williams equation (eGFRJ-W)-would be most suitable for GFR estimation among patients with cancer receiving cisplatin. Methods: We assembled a cohort of 5274 patients with cancer treated with cisplatin-based chemotherapy at two large cancer centers. We ascertained the frequency of cisplatin-associated AKI (C-AKI) defined as a ≥0.3 mg/dl rise in serum creatinine over baseline. We compared baseline eGFR and eCrCl using Bland-Altman (B-A) plots, coefficients of variation (CV), and concordance correlation coefficients. We calculated the positive predictive value (PPV), negative predictive value (PPV), accuracy, and area under the curve (AUC). Results: Patients were predominantly middle aged (median 58 years, IQR 49-66 years), overweight (median BMI 26.2, IQR 23.1-29.8 kg/m2), and White (88%), with a median baseline creatinine of 0.8 mg/dl and median cisplatin dose of 99 mg. C-AKI developed in 12% of the cohort. eGFRCKD-EPI had the highest PPV and AUC. eGFRCKD-EPI and eGFRMDRD, along with their BSA-modified counterparts, had the closest agreement with the lowest CV (7.2, 95% CI, 7.0 to 7.3) and the highest concordance. C-AKI was lowest when using eGFRCKD-EPI to define eGFR ≥60 ml/min per 1.73 m2. Conclusions: On the basis of its superior diagnostic performance, eGFRCKD-EPI should be used to estimate GFR in patients being considered for cisplatin-based chemotherapy.

Activity of cabozantinib after immune checkpoint blockade in metastatic clear-cell renal cell carcinoma.

BACKGROUND: Cabozantinib is approved for the first and subsequent line treatment of metastatic clear-cell renal cell carcinoma (ccRCC) based on trials in which most patients were immune checkpoint blockade (ICB) naive. With an expanding role of ICB in earlier lines of therapy, we assessed activity of cabozantinib in patients with metastatic ccRCC after progressing on anti-PD-1/PD-L1-based ICBs. METHODS: We retrospectively analysed the clinical outcomes of 86 patients from 2 academic centres who received cabozantinib after progression on ICB alone, ICB in combination with vascular endothelial growth factor inhibitors (VEGFis) or ICB in combination with other therapies. Overall response rate (ORR, investigator assessed), time to treatment failure (TTF), overall survival (OS) and toxicities leading to dose reductions or cessation were evaluated. RESULTS: Eighty-six patients were included in the analysis; the median age was 63 years (range 33-84) and the median number of prior therapies was 2 (range 1-10). The type of prior ICB therapy was ICBs alone (64%), an ICB in combination with a VEGFi (29%) or ICBs in combination with other therapies (7%). At the time of cabozantinib treatment, 71% of patients were in the International Metastatic RCC Database Consortium good- or intermediate-risk groups. Approximately half of patients (52%) were started on cabozantinib at the full 60 mg daily dose. The ORR was 36% (95% confidence interval [CI] = 26-47%) with no complete response and 43% achieving stable disease; 21% had primary progressive disease. The median TTF was 6.5 months (95% CI = 5.3-8.5.). The median OS was 13.1 months (95% CI = 8.7-NR) with 55% (95% CI = 41-66%) OS rate at 12 months. Most common reasons for dose reductions were fatigue (27%), palmar-plantar erythrodysesthesia (16%) and diarrhoea (10%). CONCLUSIONS: Cabozantinib is active in patients treated with prior ICB-based therapies, with no new safety signals. This study supports the use of cabozantinib after ICB-based therapies.

Safety and efficacy of immune checkpoint inhibitors in advanced urological cancers with pre-existing autoimmune disorders: a retrospective international multicenter study.

BACKGROUND: There is limited experience regarding the safety and efficacy of checkpoint inhibitors (CPI) in patients with autoimmune disorders (AD) and advanced urological cancers as they are generally excluded from clinical trials due to risk of exacerbations. METHODS: This multicenter retrospective cohort analysis of patients with advanced renal cell cancer (RCC) and urothelial cancer (UC) with pre-existing AD treated with CPI catalogued the incidence of AD exacerbations, new immune-related adverse events (irAEs) and clinical outcomes. Competing risk models estimated cumulative incidences of exacerbations and new irAEs at 3 and 6 months. RESULTS: Of 106 patients with AD (58 RCC, 48 UC) from 10 centers, 35 (33%) had grade 1/2 clinically active AD of whom 10 (9%) required corticosteroids or immunomodulators at baseline. Exacerbations of pre-existing AD occurred in 38 (36%) patients with 17 (45%) requiring corticosteroids and 6 (16%) discontinuing CPI. New onset irAEs occurred in 40 (38%) patients with 22 (55%) requiring corticosteroids and 8 (20%) discontinuing CPI. Grade 3/4 events occurred in 6 (16%) of exacerbations and 13 (33%) of new irAEs. No treatment-related deaths occurred. Median follow-up was 15 months. For RCC, objective response rate (ORR) was 31% (95% CI 20% to 45%), median time to treatment failure (TTF) was 7 months (95% CI 4 to 10) and 12-month overall survival (OS) was 78% (95% CI 63% to 87%). For UC, ORR was 40% (95% CI 26% to 55%), median TTF was 5.0 months (95% CI 2.3 to 9.0) and 12-month OS was 63% (95% CI 47% to 76%). CONCLUSIONS: Patients with RCC and UC with well-controlled AD can benefit from CPI with manageable toxicities that are consistent with what is expected of a non-AD population. Prospective study is warranted to comprehensively evaluate the benefits and safety of CPI in patients with AD.

Safety and efficacy of restarting immune checkpoint inhibitors after clinically significant immune-related adverse events in metastatic renal cell carcinoma.

BACKGROUND: Immune checkpoint inhibitors (ICI) induce a range of immune-related adverse events (irAEs) with various degrees of severity. While clinical experience with ICI retreatment following clinically significant irAEs is growing, the safety and efficacy are not yet well characterized. METHODS: This multicenter retrospective study identified patients with metastatic renal cell carcinoma treated with ICI who had >1 week therapy interruption for irAEs. Patients were classified into retreatment and discontinuation cohorts based on whether or not they resumed an ICI. Toxicity and clinical outcomes were assessed descriptively. RESULTS: Of 499 patients treated with ICIs, 80 developed irAEs warranting treatment interruption; 36 (45%) of whom were restarted on an ICI and 44 (55%) who permanently discontinued. Median time to initial irAE was similar between the retreatment and discontinuation cohorts (2.8 vs 2.7 months, p=0.59). The type and grade of irAEs were balanced across the cohorts; however, fewer retreatment patients required corticosteroids (55.6% vs 84.1%, p=0.007) and hospitalizations (33.3% vs 65.9%, p=0.007) for irAE management compared with discontinuation patients. Median treatment holiday before reinitiation was 0.9 months (0.2-31.6). After retreatment, 50% (n=18/36) experienced subsequent irAEs (12 new, 6 recurrent) with 7 (19%) grade 3 events and 13 drug interruptions. Median time to irAE recurrence after retreatment was 2.8 months (range: 0.3-13.8). Retreatment resulted in 6 (23.1%) additional responses in 26 patients whose disease had not previously responded. From first ICI initiation, median time to next therapy was 14.2 months (95% CI 8.2 to 18.9) and 9.0 months (5.3 to 25.8), and 2-year overall survival was 76% (95%CI 55% to 88%) and 66% (48% to 79%) in the retreatment and discontinuation groups, respectively. CONCLUSIONS: Despite a considerable rate of irAE recurrence with retreatment after a prior clinically significant irAE, most irAEs were low grade and controllable. Prospective studies are warranted to confirm that retreatment enhances survival outcomes that justify the safety risks.

Proton Pump Inhibitors and Survival Outcomes in Patients With Metastatic Renal Cell Carcinoma.

INTRODUCTION: Proton pump inhibitors (PPIs) are potent inhibitors of gastric acid secretion and can affect the optimal absorption of concomitant oral medications, such as vascular endothelial growth factor (VEGF) tyrosine kinase inhibitors (TKIs). The purpose of this study was to investigate the effect of PPI use on survival in metastatic renal cell carcinoma (mRCC) patients treated in the targeted therapy era. MATERIALS AND METHODS: We conducted a pooled analysis of mRCC patients treated in phase II and III clinical trials. Statistical analyses were performed using Cox regression adjusted for several risk factors and the Kaplan-Meier method. RESULTS: We identified 2188 patients treated with sunitinib (n = 952), axitinib (n = 626) or sorafenib (n = 610), of whom 120 were PPI users. Overall, PPI users showed similar overall survival compared with non-PPI users (hazard ratio [HR], 1.051; 95% confidence interval [CI], 0.769-1.438; P = .754; median, 24.1 vs. 21.3 months). Similarly, progression-free survival (HR, 1.016; 95% CI, 0.793-1.301; P = .902; median, 5.5 vs. 8.0 months) and objective response rates (23.3% vs. 27.4%; P = .344) were not different between PPI users and nonusers. These findings were consistent across International mRCC Database Consortium risk groups and according to line of therapy. Adverse events were similar between PPI users and nonusers. CONCLUSION: We showed that PPI use does not appear to negatively affect the efficacy and safety of select VEGF-TKIs in patients with mRCC. Documentation of concomitant medications and patient education on potential drug interactions are critical for optimizing the use of oral cancer-targeting therapy.

Discontinuing VEGF-targeted Therapy for Progression Versus Toxicity Affects Outcomes of Second-line Therapies in Metastatic Renal Cell Carcinoma.

BACKGROUND: A significant subgroup of metastatic renal cell carcinoma (mRCC) patients discontinue vascular endothelial growth factor-targeted therapies (VEGF-TT) because of toxicity. Whether clinical outcomes differ in patients who receive second-line (2L) targeted therapy on the basis of reason for discontinuation of first-line (1L) therapy is unknown. PATIENTS AND METHODS: Patients from 15 International Metastatic Renal Cell Carcinoma Database Consortium (IMDC) centers who started 2L targeted therapy were included and the reason for discontinuation of 1L therapy retrospectively collected. Treatment outcomes of 2L, including response, time to treatment failure, and overall survival (OS) were assessed. RESULTS: In total, 1124 patients were identified: 866 patients (77%) discontinued 1L VEGF-TT because of disease progression, and 208 patients (19%) because of toxicity. The reason for discontinuation of 1L therapy did not differ according to IMDC risk group. Compared with patients who stopped 1L VEGF-TT because of disease progression, patients who stopped because of toxicity had greater clinical benefit (nonprogressive disease as best response) in 2L treatment (68% vs. 56%; adjusted odds ratio, 1.58; 95% confidence interval [CI], 1.07-2.35; P = .023) and longer OS (17.4 vs. 11.2 months; adjusted hazard ratio, 0.69; 95% CI, 0.56-0.84; P = .0002) adjusted for type of therapy, time to initiation of 2L treatment, IMDC risk group, and number of metastases at initiation of 2L treatment. CONCLUSION: mRCC patients who discontinue 1L VEGF-TT because of toxicity have better outcomes with 2L therapy than patients who stop therapy because of disease progression. These findings should be taken into consideration when designing clinical trials for 2L therapies in mRCC.

Programmed cell death-1 pathway inhibitors in genitourinary malignancies: specific side-effects and their management.

PURPOSE OF REVIEW: Immune checkpoint inhibitors such as those that target the programmed cell death (PD)-1 pathway harness the host immune system to elicit an antitumor response. Their remarkable clinical benefit has led to regulatory approvals in several malignancies including the genitourinary cancers, renal cell carcinoma, and urothelial carcinoma. This review will focus on the management of the toxicities encountered with these agents. RECENT FINDINGS: Although generally well tolerated, a small proportion of patients (10-20%) treated with PD-1 directed agents as monotherapy can develop severe autoimmune manifestations, also known as, immune-related adverse events. These include but are not limited to rashes, pneumonitis, endocrinopathy, colitis, and immune-mediated hepatic dysfunction. Combining these agents with the anti-CTLA-4 antibody ipilimumab can be associated with a higher incidence of these toxicities. Early initiation of immunosuppression with corticosteroids and other agents when needed can help mitigate these toxicities and to date has not been shown to compromise their clinical benefit. SUMMARY: The development of immune checkpoint inhibitors represents significant advances in anticancer therapy but their efficacy may come at the cost of autoimmune toxicities secondary to their induction of the immune system. Early recognition of these effects and aggressive upfront management is essential to safely administer these agents in routine clinical practice.

Risk factors and model for predicting toxicity-related treatment discontinuation in patients with metastatic renal cell carcinoma treated with vascular endothelial growth factor-targeted therapy: Results from the International Metastatic Renal Cell Carcinoma Database Consortium.

BACKGROUND: Vascular endothelial growth factor (VEGF)-targeted therapies are standard treatment for metastatic renal cell carcinoma (mRCC); however, toxicities can lead to drug discontinuation, which can affect patient outcomes. This study was aimed at identifying risk factors for toxicity and constructing the first model to predict toxicity-related treatment discontinuation (TrTD) in mRCC patients treated with VEGF-targeted therapies. METHODS: The baseline characteristics, treatment outcomes, and toxicity data were collected for 936 mRCC patients receiving first-line VEGF-targeted therapy from the International Metastatic Renal Cell Carcinoma Database Consortium. A competing risk regression model was used to identify risk factors for TrTD, and it accounted for other causes as competing risks. RESULTS: Overall, 198 (23.8%) experienced TrTD. Sunitinib was the most common VEGF-targeted therapy (77%), and it was followed by sorafenib (18.4%). The median time on therapy was 7.1 months for all patients and 4.4 months for patients with TrTD. The most common toxicities leading to TrTD included fatigue, diarrhea, and mucositis. In a multivariate analysis, significant predictors for TrTD were a baseline age ≥60 years, a glomerular filtration rate (GFR) <30 mL/min/1.73 m(2) , a single metastatic site, and a sodium level <135 mmol/L. A risk group model was developed that used the number of patient risk factors to predict the risk of TrTD. CONCLUSIONS: In the largest series to date, age, GFR, number of metastatic sites, and baseline sodium level were found to be independent risk factors for TrTD in mRCC patients receiving VEGF-targeted therapy. Based on the number of risk factors present, a model for predicting TrTD was built to be used as a tool for toxicity monitoring in clinical practice.

Statins and survival outcomes in patients with metastatic renal cell carcinoma.

BACKGROUND: A growing body of evidence has demonstrated the anti-neoplastic activity of statins. The objective of this study was to investigate the effect of statin use on survival in patients with metastatic renal cell carcinoma (mRCC) treated in the modern therapy era. PATIENTS AND METHODS: We conducted a pooled analysis of mRCC patients treated on phase II and III clinical trials. Statistical analyses were performed using Cox regression and the Kaplan-Meier method. RESULTS: We identified 4736 patients treated with sunitinib (n=1059), sorafenib (n=772), axitinib (n=896), temsirolimus (n=457), temsirolimus+interferon (IFN)-α (n=208), bevacizumab+temsirolimus (n=393), bevacizumab+IFN-α (n=391) or IFN-α (n=560), of whom 511 were statin users. Overall, statin users demonstrated an improved overall survival (OS) compared to non-users (25.6 versus 18.9 months, adjusted hazard ratio [aHR] 0.801, 95% confidence interval [CI] 0.659-0.972, p=0.025). When stratified by therapy type, a benefit in OS was demonstrated in statin users compared to non-users in individuals receiving therapy targeting vascular endothelial growth factor (28.4 versus 22.2 months, aHR 0.749, 95% CI 0.584-0.961, p=0.023) or mammalian target of rapamycin (18.6 versus 14.0 months, aHR 0.657, 95% CI 0.445-0.972, p=0.035) but not in those receiving IFN-α (15.6 versus 14.8 months, aHR 1.292, 95% CI 0.703-2.275, p=0.410). Adverse events were similar between users and non-users. CONCLUSIONS: We demonstrate that statin use may be associated with improved survival in patients with mRCC treated in the targeted therapy era. Statins could represent an adjunct therapy for patients with mRCC; however, this is hypothesis generating and requires prospective evaluation.

Diagnosis of Renal Cell Carcinoma: A Clinician's Perspective.

Renal cell carcinoma (RCC) is a heterogeneous disease. A rigorous diagnostic assessment by a pathologist with close communication with the clinician provides more accurate prognostication and informed treatment decisions. In the localized setting, an accurate prognostic assessment directs patients to potential adjuvant clinical trials. For patients with advanced disease, the pathologic assessment may have a direct impact on the systemic therapy algorithm. Additionally, it provides the basis for continuous efforts in biomarker development. In rare histologic subtypes, the interaction between clinicians and pathologists provides an opportunity to offer patients specific clinical trials. Molecular characterization platforms may identify targets for therapeutic intervention.

Programmed death ligand-1 expression in adrenocortical carcinoma: an exploratory biomarker study.

BACKGROUND: Adrenocortical carcinoma (ACC) is a rare tumor in which prognostic factors are still not well established. Programmed Death Ligand-1 (PD-L1) expression in ACC and its association with clinico-pathological features and survival outcomes are unknown. METHODS: Formalin-fixed paraffin-embedded (FFPE) specimens were obtained from 28 patients with ACC. PD-L1 expression was evaluated by immunohistochemistry (IHC) in both tumor cell membrane and tumor infiltrating mononuclear cells (TIMC). PD-L1 positivity on tumor cells was defined as ≥5% tumor cell membrane staining. TIMC were evaluated by IHC using a CD45 monoclonal antibody. For PD-L1 expression in TIMC, a combined score based on the extent of infiltrates and percentage of positive cells was developed. Any score greater that zero was considered PD-L1 positive. Baseline clinico-pathological characteristics and follow up data were retrospectively collected. Comparisons between PD-L1 expression and clinico-pathological features were evaluated using unpaired t-test and Fisher's exact test. Kaplan-Meier method and log-rank test were used to assess association between PD-L1 expression and 5-year overall survival (OS). RESULTS: Among 28 patients with surgically treated ACC, 3 (10.7%) were considered PD-L1 positive on tumor cell membrane. On the other hand, PD-L1 expression in TIMC was performed in 27 specimens and PD-L1 positive staining was observed in 19 (70.4%) patients. PD-L1 positivity in either tumor cell membrane or TIMC was not significantly associated with higher stage at diagnosis, higher tumor grade, excessive hormone secretion, or OS. CONCLUSIONS: PD-L1 expression can exist in ACC in both tumor cell membrane and TIMC with no relationship to clinico-pathologic parameters or survival.

Angiotensin system inhibitors and survival outcomes in patients with metastatic renal cell carcinoma.

PURPOSE: The renin-angiotensin system may play a role in carcinogenesis. The purpose of this study was to evaluate the impact of angiotensin system inhibitors (ASI) on outcomes in metastatic renal cell carcinoma (mRCC) patients treated in the targeted therapy era. EXPERIMENTAL DESIGN: We conducted a pooled analysis of mRCC patients treated on phase II and III clinical trials. Statistical analyses were performed using Cox regression adjusted for several risk factors and the Kaplan-Meier method. RESULTS: A total of 4,736 patients were included, of whom 1,487 received ASIs and 783 received other antihypertensive agents. Overall, ASI users demonstrated improved overall survival (OS) compared with users of other antihypertensive agents (adjusted HR, 0.838, P = 0.0105, 26.68 vs. 18.07 months) and individuals receiving no antihypertensive therapy (adjusted HR, 0.810, P = 0.0026, 26.68 vs. 16.72 months). When stratified by therapy type, a benefit in OS was demonstrated in ASI users compared with nonusers in individuals receiving VEGF therapy (adjusted HR, 0.737, P < 0.0001, 31.12 vs. 21.94 months) but not temsirolimus or IFNα. An in vitro cell viability assay demonstrated that sunitinib in combination with an ASI significantly decreased RCC cell viability compared with control at physiologically relevant doses. This effect was not observed with either agent alone or with other non-ASI antihypertensives or temsirolimus. CONCLUSIONS: In the largest analysis to date, we demonstrate that ASI use improved survival in mRCC patients treated in the targeted therapy era. Further studies are warranted to investigate the mechanism underlying this interaction and verify our observations to inform clinical practice.

Clinical risk factors for the development of hypertension in patients treated with inhibitors of the VEGF signaling pathway.

BACKGROUND: VEGF signaling pathway inhibitor (anti-VEGF) therapy is associated with hypertension, but little is known about predisposing clinical characteristics. This study describes the real-world association between baseline clinical characteristics, blood pressure (BP) response, and survival in patients prescribed anti-VEGF therapies. METHODS: Clinical data from Partners HealthCare in Massachusetts was obtained from adults treated with anti-VEGF therapies (2002-2013). Treatment-induced hypertensive response was defined as worsening of preexisting hypertension or new diagnosis of hypertension (if no prior hypertension history). RESULTS: Data from 1120 patients with renal cell carcinoma (32.2%), hepatocellular carcinoma (11.6%), gastrointestinal stromal tumors (12.5%), and other sarcomas (15.3%) were analyzed. Most patients received sunitinib (52%), sorafenib (25.9%), or pazopanib (18%). A treatment-induced hypertensive response was identified in 49.7% of treated patients. Preexisting hypertension, present in 65.4%, was an independent risk factor for BP elevation (odds ratio [OR], 1.56; 95% confidence interval [CI], 1.27-1.92); other risk factors included age ≥60 years (OR, 1.26; 95% CI, 1.06-1.52), and body mass index (BMI) ≥25 kg/m(2) (OR, 1.26; 95% CI, 1.04-1.53). Race, sex, anti-VEGF therapy prescribed, and baseline antihypertensive class were not significant risk factors. The absolute observed mean increase in BP was 21 mm Hg (systolic)/15 mm Hg (diastolic), both in patients with and without preexisting hypertension. The development of hypertension predicted improved survival (hazard ratio, 0.76; 95% CI, 0.65-0.89). CONCLUSIONS: Preexisting hypertension, age, and BMI identify patients at risk for significant anti-VEGF therapy-induced BP elevation. Hypertension appears to be a clinical biomarker of efficacy of anti-VEGF therapies in a broad range of malignancies.