Bayer to Highlight New Research at ASCO GI 2019 Cancers Symposium

WHIPPANY, N.J., Jan. 16, 2019 /PRNewswire/ -- Bayer will present new data from its continued research on Stivarga^® (regorafenib) in metastatic colorectal cancer (mCRC) and metastatic biliary tract cancers, and Nexavar^® (sorafenib) in advanced liver cancer, at the 2019 American Society of Clinical Oncology Gastrointestinal (ASCO GI) Cancers Symposium on January 17-19 in San Francisco.

Among the research presented will be the final analysis from the prospective, observational CORRELATE study, which analyzed the overall survival of over 900 patients with mCRC in relation to the location of their primary tumor. Additionally, results from the REACHIN trial exploring the efficacy of regorafenib in patients with locally advanced (non-resectable) and metastatic biliary tract tumors that progress after chemotherapy will be presented. Findings from additional studies of regorafenib in mCRC will also be presented, including results from the Phase II LCCC1029 trial investigating second line FOLFIRI with regorafenib or placebo in mCRC.

Further presentations will highlight results from ongoing trials investigating outcomes of tyrosine kinase inhibitors used after, or in combination with immunotherapy, in advanced hepatocellular carcinoma patients.

Notable regorafenib and sorafenib studies at the ASCO GI 2019 Cancers Symposium include:

Regorafenib

• Outcomes by tumor location in patients with metastatic colorectal cancer (mCRC) treated with regorafenib (REG): Final analysis from the prospective, observational CORRELATE study
• Abstract: 539, Poster Session C; January 19, 07:00 – 7:55 am and 12:15 – 1:45 pm (PST); Board F2
• Regorafenib after failure of gemcitabine and platinum-based chemotherapy for locally advanced (non resectable) and metastatic biliary tumors: a randomized double-blinded placebo-controlled Phase II trial
• Abstract: 345, Poster Session B; January 18, 11:30 am – 1:00 pm and 5:30 – 6:30 pm (PST); Board J3
• Association of consensus molecular subtypes (CMS) with progression free survival (PFS) and overall survival (OS) with 2nd-line FOLFIRI +/- regorafenib in metastatic colorectal cancer (mCRC)
• Abstract: 597, Poster Session C; January 19, 07:00 – 7:55 am and 12:15 – 1:45 pm (PST); Board H20
• Blood-based biomarkers in metastatic colorectal cancer patients treated with FOLFIRI plus regorafenib or placebo: Results from LCCC1029
• Abstract: 587, Poster Session C; January 19, 07:00 – 7:55 am and 12:15 – 1:45 pm (PST); Board H10
• Retrospective multicenter study for assessment of association between imaging change and outcome after treatment of regorafenib: KSCC1603 
• Abstract: 509, Poster Session C; January 19, 07:00 – 7:55 am and 12:15 – 1:45 pm (PST); Board D12

Sorafenib

• Outcomes of tyrosine kinase inhibitors (TKI) after immunotherapy in unresectable or advanced hepatocellular carcinoma (HCC) patients
• Abstract: 361, Poster Session B; January 18, 11:30 am – 1:00 pm and 5:30 – 6:30 pm (PST); Board K1
• Phase II multicenter pilot study of safety, efficacy, and immune cell profiling in advanced hepatocellular carcinoma (HCC) on combination of sorafenib (SOR) plus nivolumab (NIVO)
• Abstract: TPS464, Poster Session B; January 18, 11:30 am – 1:00 pm and 5:30 – 6:30 pm (PST); Board Q3

About Stivarga^® (regorafenib)
In April 2017, Stivarga was approved for use in patients with hepatocellular carcinoma who have been previously treated with Nexavar^® (sorafenib). In the United States, Stivarga is also indicated for the treatment of patients with metastatic colorectal cancer (CRC) who have been previously treated with fluoropyrimidine-, oxaliplatin- and irinotecan-based chemotherapy, an anti-VEGF therapy, and, if RAS wild-type, an anti-EGFR therapy. It is also indicated for the treatment of patients with locally advanced, unresectable or metastatic gastrointestinal stromal tumor (GIST) who have been previously treated with imatinib mesylate and sunitinib malate.

Regorafenib is a compound developed by Bayer. In 2011, Bayer entered into an agreement with Onyx, now an Amgen subsidiary, under which Onyx receives a royalty on all global net sales of regorafenib in oncology.

Important Safety Information for Stivarga

Hepatotoxicity: Severe drug-induced liver injury with fatal outcome occurred in STIVARGA-treated patients across all clinical trials. In most cases, liver dysfunction occurred within the first 2 months of therapy and was characterized by a hepatocellular pattern of injury. In metastatic colorectal cancer (mCRC), fatal hepatic failure occurred in 1.6% of patients in the STIVARGA arm and in 0.4% of patients in the placebo arm. In gastrointestinal stromal tumor (GIST), fatal hepatic failure occurred in 0.8% of patients in the STIVARGA arm. In hepatocellular carcinoma (HCC), there was no increase in the incidence of fatal hepatic failure as compared to placebo.

Liver Function Monitoring: Obtain liver function tests (ALT, AST, and bilirubin) before initiation of STIVARGA and monitor at least every 2 weeks during the first 2 months of treatment. Thereafter, monitor monthly or more frequently as clinically indicated. Monitor liver function tests weekly in patients experiencing elevated liver function tests until improvement to less than 3 times the upper limit of normal (ULN) or baseline values. Temporarily hold and then reduce or permanently discontinue STIVARGA, depending on the severity and persistence of hepatotoxicity as manifested by elevated liver function tests or hepatocellular necrosis.

Infections: STIVARGA caused an increased risk of infections. The overall incidence of infection (Grades 1-5) was higher (32% vs 17%) in 1142 STIVARGA-treated patients as compared to the control arm in randomized placebo-controlled trials. The incidence of grade 3 or greater infections in STIVARGA treated patients was 9%. The most common infections were urinary tract infections (5.7%), nasopharyngitis (4.0%), mucocutaneous and systemic fungal infections (3.3%) and pneumonia (2.6%). Fatal outcomes caused by infection occurred more often in patients treated with STIVARGA (1.0%) as compared to patients receiving placebo (0.3%); the most common fatal infections were respiratory (0.6% vs 0.2%). Withhold STIVARGA for Grade 3 or 4 infections, or worsening infection of any grade. Resume STIVARGA at the same dose following resolution of infection.

Hemorrhage: STIVARGA caused an increased incidence of hemorrhage. The overall incidence (Grades 1-5) was 18.2% in 1142 patients treated with STIVARGA vs 9.5% with placebo in randomized, placebo-controlled trials. The incidence of grade 3 or greater hemorrhage in patients treated with STIVARGA was 3.0%. The incidence of fatal hemorrhagic events was 0.7%, involving the central nervous system or the respiratory, gastrointestinal, or genitourinary tracts. Permanently discontinue STIVARGA in patients with severe or life-threatening hemorrhage and monitor INR levels more frequently in patients receiving warfarin.

Gastrointestinal Perforation or Fistula: Gastrointestinal perforation occurred in 0.6% of 4518 patients treated with STIVARGA across all clinical trials of STIVARGA administered as a single agent; this included eight fatal events. Gastrointestinal fistula occurred in 0.8% of patients treated with STIVARGA and in 0.2% of patients in the placebo arm across randomized, placebo-controlled trials. Permanently discontinue STIVARGA in patients who develop gastrointestinal perforation or fistula.

Dermatological Toxicity: In randomized, placebo-controlled trials, adverse skin reactions occurred in 71.9% of patients with STIVARGA arm and 25.5% of patients in the placebo arm including hand-foot skin reaction (HFSR) also known as palmar-plantar erythrodysesthesia syndrome (PPES) and severe rash, requiring dose modification. In the randomized, placebo-controlled trials, the overall incidence of HFSR was higher in 1142 STIVARGA-treated patients (53% vs 8%) than in the placebo-treated patients. Most cases of HFSR in STIVARGA-treated patients appeared during the first cycle of treatment. The incidences of Grade 3 HFSR (16% vs <1%), Grade 3 rash (3% vs <1%), serious adverse reactions of erythema multiforme (<0.1% vs 0%), and Stevens-Johnson syndrome (<0.1% vs 0%) were higher in STIVARGA-treated patients. Across all trials, a higher incidence of HFSR was observed in Asian patients treated with STIVARGA (all grades: 72%; Grade 3:18%). Toxic epidermal necrolysis occurred in 0.02% of 4518 STIVARGA-treated patients across all clinical trials of STIVARGA administered as a single agent. Withhold STIVARGA, reduce the dose, or permanently discontinue depending on the severity and persistence of dermatologic toxicity.

Hypertension: Hypertensive crisis occurred in 0.2% in STIVARGA-treated patients and in none of the patients in placebo arm across all randomized, placebo-controlled trials. STIVARGA caused an increased incidence of hypertension (30% vs 8% in mCRC, 59% vs 27% in GIST, and 31% vs 6% in HCC). The onset of hypertension occurred during the first cycle of treatment in most patients who developed hypertension (67% in randomized, placebo controlled trials). Do not initiate STIVARGA until blood pressure is adequately controlled. Monitor blood pressure weekly for the first 6 weeks of treatment and then every cycle, or more frequently, as clinically indicated. Temporarily or permanently withhold STIVARGA for severe or uncontrolled hypertension.

Cardiac Ischemia and Infarction: STIVARGA increased the incidence of myocardial ischemia and infarction (0.9% with STIVARGA vs 0.2% with placebo) in randomized placebo-controlled trials. Withhold STIVARGA in patients who develop new or acute cardiac ischemia or infarction, and resume only after resolution of acute cardiac ischemic events if the potential benefits outweigh the risks of further cardiac ischemia.

Reversible Posterior Leukoencephalopathy Syndrome (RPLS): Reversible posterior leukoencephalopathy syndrome (RPLS), a syndrome of subcortial vasogenic edema diagnosed by characteristic finding on MRI occurred in one of 4800 STIVARGA-treated patients across all clinical trials. Perform an evaluation for RPLS in any patient presenting with seizures, severe headache, visual disturbances, confusion, or altered mental function. Discontinue STIVARGA in patients who develop RPLS.

Wound Healing Complications: Treatment with STIVARGA should be stopped at least 2 weeks prior to scheduled surgery. Resuming treatment after surgery should be based on clinical judgment of adequate wound healing. STIVARGA should be discontinued in patients with wound dehiscence.

Embryo-Fetal Toxicity: STIVARGA can cause fetal harm when administered to a pregnant woman. There are no available data on STIVARGA use in pregnant women. Advise pregnant women of the potential risk to a fetus. Advise females of reproductive potential and males with female partners of reproductive potential to use effective contraception during treatment with STIVARGA and for 2 months after the final dose.

Nursing Mothers: Because of the potential for serious adverse reactions in breastfed infants from STIVARGA, do not breastfeed during treatment with STIVARGA and for 2 weeks after the final dose.

Most Frequently Observed Adverse Drug Reactions in mCRC (≥30%): The most frequently observed adverse drug reactions (≥30%) in STIVARGA-treated patients vs placebo-treated patients in mCRC, respectively, were: asthenia/fatigue (64% vs 46%), pain (59% vs 48%), decreased appetite and food intake (47% vs 28%), HFSR/PPE (45% vs 7%), diarrhea (43% vs 17%), mucositis (33% vs 5%), weight loss (32% vs 10%), infection (31% vs 17%), hypertension (30% vs 8%), and dysphonia (30% vs 6%).

Most Frequently Observed Adverse Drug Reactions in GIST (≥30%): The most frequently observed adverse drug reactions (≥30%) in STIVARGA-treated patients vs placebo-treated patients in GIST, respectively, were: HFSR/PPE (67% vs 12%), pain (60% vs 55%), hypertension (59% vs 27%), asthenia/fatigue (52% vs 39%), diarrhea (47% vs 9%), mucositis (40% vs 8%), dysphonia (39% vs 9%), infection (32% vs 5%), decreased appetite and food intake (31% vs 21%), and rash (30% vs 3%).

Most Frequently Observed Adverse Drug Reactions in HCC (≥30%): The most frequently observed adverse drug reactions (≥30%) in STIVARGA-treated patients vs placebo-treated patients in HCC, respectively, were: pain (55% vs 44%), HFSR/PPE (51% vs 7%), asthenia/fatigue (42% vs 33%), diarrhea (41% vs 15%), hypertension (31% vs 6%), infection (31% vs 18%), decreased appetite and food intake (31% vs 15%).

Please see full Prescribing Information, including Boxed Warning for Stivarga (regorafenib).

About Nexavar® (sorafenib)
NEXAVAR^® is indicated for the treatment of patients with unresectable hepatocellular carcinoma (HCC).

NEXAVAR is indicated for the treatment of patients with advanced renal cell carcinoma (RCC).

NEXAVAR is indicated for the treatment of patients with locally recurrent or metastatic, progressive, differentiated thyroid carcinoma (DTC) that is refractory to radioactive iodine treatment.

Important Safety Information

Contraindications: NEXAVAR is contraindicated in patients with known severe hypersensitivity to sorafenib or any other component of NEXAVAR. 
NEXAVAR in combination with carboplatin and paclitaxel is contraindicated in patients with squamous cell lung cancer.

Cardiovascular Events: In the SHARP (HCC) study, the incidence of cardiac ischemia/infarction was 2.7% in NEXAVAR-treated patients compared with 1.3% for placebo-treated group.  In the TARGET (RCC) study, the incidence of cardiac ischemia/infarction was higher in the NEXAVAR-treated group (2.9%) compared with the placebo-treated group (0.4%). In the DECISION (DTC) study, the incidence of cardiac ischemia/infarction was 1.9% in the NEXAVAR-treated group compared with 0% in the placebo-treated group. Patients with unstable coronary artery disease or recent myocardial infarction were excluded from this study. Temporary or permanent discontinuation of NEXAVAR should be considered in patients who develop cardiovascular events.

Hemorrhage:  An increased risk of bleeding may occur following NEXAVAR administration. In the SHARP (HCC) study, the following bleeding adverse reactions were reported in the NEXAVAR-treated vs. placebo-treated patients, respectively: bleeding from esophageal varices (2.4% vs. 4%) and bleeding with fatal outcome at any site (2.4% vs. 4%).  In the TARGET (RCC) study, bleeding regardless of causality was reported in 15.3% of patients in the NEXAVAR-treated group and 8.2% of patients in the placebo-treated group. The incidence of CTCAE Grade 3 and 4 bleeding was 2% and 0%, respectively, in NEXAVAR-treated patients, and 1.3% and 0.2%, respectively, in placebo-treated patients. There was one fatal hemorrhage in each treatment group in the TARGET (RCC) study. In the DECISION (DTC) study, bleeding was reported in 17.4% of NEXAVAR-treated patients and 9.6% of placebo-treated patients; however, the incidence of CTCAE Grade 3 bleeding was 1% in NEXAVAR-treated patients and 1.4% in placebo-treated patients. There was no Grade 4 bleeding reported and there was one fatal hemorrhage in a placebo-treated patient.  If any bleeding necessitates medical intervention, permanent discontinuation of NEXAVAR should be considered.

Hypertension:  Monitor blood pressure weekly during the first 6 weeks and periodically thereafter, and treat, if required. In the SHARP (HCC) study, hypertension was reported in 9.4% of NEXAVAR-treated patients and 4.3% of patients in the placebo-treated group. In the TARGET (RCC) study, hypertension was reported in 16.9% of NEXAVAR-treated patients and 1.8% of patients in the placebo-treated group. In the DECISION (DTC) study, hypertension was reported in 40.6% of NEXAVAR-treated patients and 12.4% of placebo-treated patients.  Hypertension was usually mild to moderate, occurred early in the course of treatment, and was managed with standard antihypertensive therapy. In cases of severe or persistent hypertension despite institution of antihypertensive therapy, consider temporary or permanent discontinuation of NEXAVAR.

Dermatologic Toxicities:  Hand-foot skin reaction and rash are the most common adverse reactions attributed to NEXAVAR. Management of dermatologic toxicities may include topical therapies for symptomatic relief, temporary treatment interruption and/or dose modification of NEXAVAR, or in severe or persistent cases, permanent discontinuation of NEXAVAR. There have been reports of severe dermatologic toxicities, including Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN). These cases may be life-threatening. Discontinue NEXAVAR if SJS or TEN are suspected.

Gastrointestinal Perforation:  Gastrointestinal perforation was an uncommon adverse reaction and has been reported in less than 1% of patients taking NEXAVAR. Permanently discontinue NEXAVAR in the event of a gastrointestinal perforation.

Warfarin:  Infrequent bleeding or elevations in the International Normalized Ratio (INR) have been reported in some patients taking warfarin while on NEXAVAR. Monitor patients taking concomitant warfarin regularly for changes in prothrombin time (PT), INR, or clinical bleeding episodes.

Wound Healing Complications:  Temporary interruption of NEXAVAR therapy is recommended in patients undergoing major surgical procedures. 

Increased Mortality, Concomitant Administration with Carboplatin/Paclitaxel & Gemcitabine/Cisplatin in Squamous Cell Lung Cancer:  In a subset analysis of two randomized controlled trials in chemo-naïve patients with Stage IIIB-IV non-small cell lung cancer, patients with squamous cell carcinoma experienced higher mortality with the addition of NEXAVAR compared to those treated with carboplatin/paclitaxel alone (HR 1.81, 95% CI 1.19–2.74) and gemcitabine/cisplatin alone (HR 1.22, 95% CI 0.82-1.80). NEXAVAR, in combination with gemcitabine/cisplatin, is not recommended in patients with squamous cell lung cancer. The safety and effectiveness of NEXAVAR has not been established in patients with non-small cell lung cancer.

QT Interval Prolongation: NEXAVAR can prolong the QT/QTc interval.  QT/QTc interval prolongation increases the risk for ventricular arrhythmias. Avoid use in patients with congenital long QT syndrome. Monitor electrolytes and electrocardiograms in patients with congestive heart failure, bradyarrhythmias, drugs known to prolong the QT interval, including Class Ia and III antiarrhythmics. Correct electrolyte abnormalities (magnesium, potassium, calcium). Interrupt NEXAVAR if QTc interval is greater than 500 milliseconds or for an increase from baseline of 60 milliseconds or greater.

Drug-Induced Liver Injury: Sorafenib-induced hepatitis is characterized by a hepatocellular pattern of liver damage with significant increases of transaminases which may result in hepatic failure and death. Increases in bilirubin and INR may also occur. Liver function tests should be monitored regularly and in cases of increased transaminases without alternative explanation NEXAVAR should be discontinued.

Embryo-Fetal Toxicity:  Based on its mechanism of action and findings in animals, NEXAVAR may cause fetal harm when administered to a pregnant woman. Sorafenib caused embryo-fetal toxicities in animals at maternal exposures that were significantly lower than the human exposures at the recommended dose of 400 mg twice daily. Advise pregnant women and females of reproductive potential of the potential risk to a fetus. Verify the pregnancy status of females of reproductive potential prior to initiation of NEXAVAR. Advise females of reproductive potential to use effective contraception during treatment and for 6 months following the last dose of NEXAVAR. Advise male patients with female partners of reproductive potential and pregnant partners to use effective contraception during treatment and for 3 months following the last dose of NEXAVAR.

Impairment of Thyroid Stimulating Hormone Suppression in Differentiated Thyroid Carcinoma:  NEXAVAR impairs exogenous thyroid suppression.  In the DECISION (DTC) study, 99% of patients had a baseline thyroid stimulating hormone (TSH) level less than 0.8 mU/L.  Elevation of TSH level above 0.5 mU/L was observed in 41% of NEXAVAR-treated patients as compared with 16% of placebo-treated patients.  For patients with impaired TSH suppression while receiving NEXAVAR, the median maximal TSH was 1.6 mU/L and 25% had TSH levels greater than 4.4mU/L.  Monitor TSH levels monthly and adjust thyroid replacement medication as need in patients with DTC.

Laboratory Abnormalities:  In the HCC study, the most common laboratory abnormalities observed in the NEXAVAR arm versus the placebo arm, respectively, were hypoalbuminemia (59% vs. 47%), lymphopenia (47% vs. 42%), thrombocytopenia (46% vs. 41%), elevation in INR (42% vs. 34%), elevated lipase (40% vs. 37%), hypophosphatemia (35% vs. 11%), elevated amylase (34% vs. 29%), hypocalcemia (27% vs. 15%), and hypokalemia (9.5% vs. 5.9%).

In the RCC study, the most common laboratory abnormalities observed in the NEXAVAR arm versus the placebo arm, respectively, were hypophosphatemia (45% vs. 11%), anemia (44% vs. 49%), elevated lipase (41% vs. 30%), elevated amylase (30% vs. 23%), lymphopenia (23% vs. 13%), neutropenia (18% vs. 10%), thrombocytopenia (12% vs. 5%), hypocalcemia (12% vs. 8%), and hypokalemia (5.4% vs. 0.7%).

In the DTC study, the most common laboratory abnormalities observed in the NEXAVAR arm versus the placebo arm, respectively, were elevated ALT (59% vs. 24%), elevated AST (54% vs. 15%), and hypocalcemia (36% vs. 11%).The relative increase for the following laboratory abnormalities observed in NEXAVAR-treated DTC patients as compared to placebo-treated patients is similar to that observed in the RCC and HCC studies: lipase, amylase, hypokalemia, hypophosphatemia, neutropenia, lymphopenia, anemia, and thrombocytopenia.

Most Frequently Observed Adverse Drug Reactions (≥20%):  The most common adverse reactions reported in in ≥20% of patients and at a higher rate in the NEXAVAR arm versus the placebo arm, respectively, in the SHARP (HCC) study included: diarrhea (55% vs. 25%), fatigue (46% vs. 45%), abdominal pain (31% vs. 26%), weight loss (30% vs. 10%), anorexia (29% vs. 18%), nausea (24% vs. 20%), and hand-foot skin reaction (21% vs. 3%). Grade 3/4 adverse reactions were 45% vs. 32%. 

The most common adverse reactions reported in in ≥20% of patients and at a higher rate in the NEXAVAR arm versus the placebo arm, respectively, in the TARGET (RCC) study included:  diarrhea (43% vs. 14%), rash/desquamation (40% vs. 16%), fatigue (37% vs. 28%), hand-foot skin reaction (30% vs. 7%), alopecia (27% vs. 3%), and nausea (23% vs. 19%), anorexia (29% vs. 18%), nausea (23% vs. 19%). Grade 3/4 adverse reactions were 38% vs. 28%.

The most common adverse reactions reported in in ≥20% of patients and at a higher rate in the NEXAVAR arm versus the placebo arm, respectively, in the DECISION (DTC) study included: palmar-plantar erythrodysesthesia syndrome (PPES) (69% vs. 8%), diarrhea (68% vs. 15%), alopecia (67% vs. 8%), weight loss (49% vs. 14%), fatigue (41% vs. 20%), hypertension (41% vs. 12%), rash (35% vs. 7%), decreased appetite (30% vs. 5%), stomatitis (24% vs. 3%), nausea (21% vs. 12%), pruritus (20% vs. 11%), and abdominal pain (20% vs. 7%). Grade 3/4 adverse reactions were 65% vs 30%.

Drug Interactions:  Avoid concomitant use of strong CYP3A4 inducers, when possible, because inducers can decrease the systemic exposure of sorafenib. NEXAVAR exposure decreases when co-administered with oral neomycin. Effects of other antibiotics on NEXAVAR pharmacokinetics have not been studied.

Lactation: Because of the potential for serious adverse reactions in a breastfed child from NEXAVAR, advise lactating women not to breastfeed during treatment with NEXAVAR and for 2 weeks after the last dose.

Please see full Prescribing Information for Nexavar (sorafenib).

About Oncology at Bayer
Bayer is committed to delivering science for a better life by advancing a portfolio of innovative treatments. The oncology franchise at Bayer includes four marketed products and several other assets in various stages of clinical development. Together, these products reflect the company's approach to research, which prioritizes targets and pathways with the potential to impact the way that cancer is treated.

About Bayer
Bayer is a global enterprise with core competencies in the Life Science fields of health care and agriculture. Its products and services are designed to benefit people and improve their quality of life. At the same time, the Group aims to create value through innovation, growth and high earning power. Bayer is committed to the principles of sustainable development and to its social and ethical responsibilities as a corporate citizen. In fiscal 2017, the Group employed around 99,800 people and had sales of EUR 35.0 billion. Capital expenditures amounted to EUR 2.4 billion, R&D expenses to EUR 4.5 billion. For more information, go to www.bayer.us.

© 2019 Bayer 
BAYER^®, the Bayer Cross, Stivarga and Nexavar are registered trademarks of Bayer.

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