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Vectibix (Panitumumab) - Summary



Dermatologic Toxicity: Dermatologic toxicities occurred in 90% of patients and were severe (NCI-CTC grade 3 and higher) in 15% of patients receiving Vectibix monotherapy [see Dosage and Administration ( 2.3 ), Warnings and Precautions ( 5.1 ), and Adverse Reactions ( 6.1 )] .



Vectibix (panitumumab) is a recombinant, human IgG2 kappa monoclonal antibody that binds specifically to the human epidermal growth factor receptor (EGFR).

Vectibix is indicated as a single agent for the treatment of EGFR-expressing, metastatic colorectal carcinoma (mCRC) with disease progression on or following fluoropyrimidine-, oxaliplatin-, and irinotecan-containing chemotherapy regimens.

The effectiveness of Vectibix as a single agent for the treatment of EGFR-expressing, metastatic colorectal carcinoma is based on progression-free survival [see Clinical Studies]. Currently, no data demonstrate an improvement in disease-related symptoms or increased survival with Vectibix.

See all Vectibix indications & dosage >>


Media Articles Related to Vectibix (Panitumumab)

Applying New Jersey population traits to Louisiana reverses colorectal cancer trends
Source: Colorectal Cancer News From Medical News Today [2015.07.22]
Computer model shows incidence, mortality would drop steeplyIf Louisiana, which has some of the highest colon cancer incidence and mortality rates in the nation, had the same risk factors...

MD Anderson study finds one-third of colorectal cancers diagnosed before 35 are hereditary
Source: Colorectal Cancer News From Medical News Today [2015.07.21]
Researchers recommend genetic counseling to benefit familiesHereditary colorectal cancers, caused by inherited gene mutations, are relatively rare for most patients.

'Hotspots' for Fatal Colorectal Cancer ID'd in Southeast U.S. (CME/CE)
Source: MedPage Today Gastroenterology [2015.07.15]
(MedPage Today) -- Historically low screening rates, other factors appear to contribute.

Three large U.S. hot spots have excessive colorectal cancer death rates
Source: Colorectal Cancer News From Medical News Today [2015.07.08]
While most of the United States has experienced large declines in colorectal cancer death rates in recent years, progress in the Mississippi Delta and two other areas has lagged.

Second-line cetuximab active beyond progression in quadruple wild-type patients with metastatic colorectal cancer
Source: Colorectal Cancer News From Medical News Today [2015.07.04]
Patients with metastatic colorectal cancer (mCRC) that are mutation-free in the KRAS, NRAS, BRAF and PIK3CA genes showed significant benefit from continuing anti-epidermal growth factor receptor...

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Published Studies Related to Vectibix (Panitumumab)

Health-related quality of life and colorectal cancer-specific symptoms in patients with chemotherapy-refractory metastatic disease treated with panitumumab. [2011.02]
PURPOSE: Panitumumab monotherapy is approved for chemotherapy-refractory wild-type KRAS metastatic colorectal cancer (mCRC). Patient-reported outcomes-although important in the palliative setting-have not been reported in this patient population... CONCLUSIONS: Panitumumab-treated patients with wild-type KRAS mCRC maintained better control of CRC symptoms and quality of life compared with BSC alone, extending our understanding of the benefits of panitumumab treatment beyond improvements in progression-free survival.

Randomized, phase III trial of panitumumab with infusional fluorouracil, leucovorin, and oxaliplatin (FOLFOX4) versus FOLFOX4 alone as first-line treatment in patients with previously untreated metastatic colorectal cancer: the PRIME study. [2010.11.01]
PURPOSE: Panitumumab, a fully human anti-epidermal growth factor receptor (EGFR) monoclonal antibody that improves progression-free survival (PFS), is approved as monotherapy for patients with chemotherapy-refractory metastatic colorectal cancer (mCRC). The Panitumumab Randomized Trial in Combination With Chemotherapy for Metastatic Colorectal Cancer to Determine Efficacy (PRIME) was designed to evaluate the efficacy and safety of panitumumab plus infusional fluorouracil, leucovorin, and oxaliplatin (FOLFOX4) versus FOLFOX4 alone as initial treatment for mCRC... CONCLUSION: This study demonstrated that panitumumab-FOLFOX4 was well tolerated and significantly improved PFS in patients with WT KRAS tumors and underscores the importance of KRAS testing for patients with mCRC.

Randomized phase III study of panitumumab with fluorouracil, leucovorin, and irinotecan (FOLFIRI) compared with FOLFIRI alone as second-line treatment in patients with metastatic colorectal cancer. [2010.11.01]
PURPOSE: Panitumumab is a fully human anti-epidermal growth factor receptor (EGFR) monoclonal antibody that improves progression-free survival (PFS) in chemotherapy-refractory metastatic colorectal cancer (mCRC). This trial evaluated the efficacy and safety of panitumumab plus fluorouracil, leucovorin, and irinotecan (FOLFIRI) compared with FOLFIRI alone after failure of initial treatment for mCRC by tumor KRAS status... CONCLUSION: Panitumumab plus FOLFIRI significantly improved PFS and is well-tolerated as second-line treatment in patients with WT KRAS mCRC.

Skin toxicity evaluation protocol with panitumumab (STEPP), a phase II, open-label, randomized trial evaluating the impact of a pre-Emptive Skin treatment regimen on skin toxicities and quality of life in patients with metastatic colorectal cancer. [2010.03.10]
PURPOSE: Panitumumab, a fully human monoclonal antibody targeting the epidermal growth factor receptor (EGFR), is approved in the United States and Europe for the treatment of refractory metastatic colorectal cancer (mCRC). Skin toxicities are the most common adverse events with EGFR inhibitors. This is the first study designed to examine differences between pre-emptive and reactive skin treatment for specific skin toxicities in patients with mCRC for any EGFR inhibitor... CONCLUSION: The pre-emptive skin treatment regimen was well tolerated. The incidence of specific >or= grade 2 skin toxicities during the 6-week skin treatment period was reduced by more than 50% in the pre-emptive group compared with the reactive group. Patients in the pre-emptive group reported less QOL impairment than patients in the reactive group.

Association of progression-free survival, overall survival, and patient-reported outcomes by skin toxicity and KRAS status in patients receiving panitumumab monotherapy. [2009.04.01]
BACKGROUND: The authors explored the association of skin toxicity (ST) severity as measured by patient-reported ST and Common Terminology Criteria for Adverse Events (CTCAE) grading with efficacy of panitumumab, a fully human antiepidermal growth factor receptor antibody, from a phase 3 metastatic colorectal cancer (CRC) trial... CONCLUSIONS: More severe ST, by both clinical grading and PRO, is associated with better CRC symptoms and HRQOL and with longer OS and PFS among panitumumab-treated patients. The associations for PFS were more pronounced in patients with WT KRAS tumors. (c) 2009 American Cancer Society

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Clinical Trials Related to Vectibix (Panitumumab)

New Individualized Therapy Trial for Metastatic Colorectal Cancer [Recruiting]
The purpose of this study is to evaluate the safety and tolerability of imatinib mesylate in combination with panitumumab for the treatment of stage IV colorectal cancer that has spread to the liver. It will also assess the whether imatinib mesylate, either alone or in combination with panitumumab, is effective in treating this type of cancer. In addition, the study will evaluate the feasibility of a predefined lab score and whether it can predict which patients will respond to treatment with imatinib mesylate.

Chemoradiation With Gemcitabine in Combination With Panitumumab for Patients With Locally Advanced Pancreatic Cancer [Recruiting]
The purpose of this study is to investigate whether the addition of panitumumab to radiotherapy plus gemcitabine will increase the number of patients who are alive and progression free at 7 months.

Radio-chemotherapy With or Without Panitumumab (Vectibix�) in Irresectable Squamous Cell Carcinoma or Adenocarcinoma of the Oesophagus [Recruiting]
For esophageal cancer that can not be removed by surgery, the choice of treatment is a combination of chemotherapy and radiotherapy. We call this combination- (or concurrent) chemoradiotherapy. Chemotherapy is treatment with drugs that kill cancer cells. Both chemotherapy and radiotherapy make the tumour smaller and enhance each other's effect. The goal of treatment with chemotherapy and radiation therapy is to cure the cancer. Unfortunately only a small proportion of patients are cured with this treatment.

Improvements in the outcome of treatment may be expected by using the so-called "targeted" treatments. With esophageal cancer, a protein (the epidermal growth factor receptor (this is a kind of trap), the EGFR), is present in many tumours. This protein causes the tumor to grow. Panitumumab is a drug that blocks the functioning of this receptor (catcher), so that possibly the growth and spread of esophageal cancer is prevented.

The main objective of this trial is to see if survival of patients with inoperable esophageal cancer improves as panitumumab is added to standard treatment with chemoradiotherapy.

It will also investigate whether patients tolerate the addition of panitumumab to the standard treatment. Also, the biological characteristics of the tumor will be examined. In a proportion of patients it will be determined how the enhancement of the cancer is visible on an FDG-PET scan before the start of treatment and how this changes during the treatment. It will be also be evaluated how this treatment affects the survival.

Panitumumab and Irinotecan for Malignant Gliomas [Recruiting]
This is a phase II study of the combination of panitumumab with irinotecan in malignant glioma patients. The primary objective of the study is to determine the activity of the combination of panitumumab with irinotecan as measured by 6-month progression-free survival. Secondary objectives include the following- to determine the safety of panitumumab in combination with irinotecan in patients with malignant glioma; to determine the effect of panitumumab in combination with irinotecan on corticosteroid dose for each patient; to explore any relationship between epidermal growth factor receptor (EGF-R) mutational analysis and efficacy or toxicity; and, to determine the response rate and overall survival of recurrent glioblastoma (GBM) patients treated with panitumumab in combination with irinotecan.

The patients will have histologically documented grade 4 malignant gliomas (glioblastoma multiforme or gliosarcoma) that have failed at least one prior chemotherapy regimen and all patients will have received radiation therapy. This study will investigate second or greater line of therapy for recurrent grade 4 malignant glioma. The patient population will include 32 patients.

The patients will undergo a baseline magnetic resonance imaging (MRI) as well as a MRI after every six-week cycle to determine response and progression. After 16 patients with recurrent GBM are treated, an interim analysis will be conducted. The most common side effects associated with panitumumab have been dermatological (skin) problems such as erythema (redness of the skin), acneiform rash (skin eruptions of the face), skin exfoliation, pruritus (itching), skin fissures (skin tears), xerosis (dryness of the eye, skin, or mouth), and rash. The most common side effects associated with irinotecan have been decreased blood counts of platelets (increased risk of bleeding), white blood cells (increased risk of infection), red blood cells (anemia); diarrhea, constipation, nausea, vomiting, tiredness, fever, mouth sores, dehydration (excessive loss of body fluids), rash, itching, changes in skin color, swelling, numbness, tingling, dizziness, confusion, low blood pressure, sweating, hot flashes, hair loss, inflammation of the liver, flu-like symptoms, decreased urine output, shortness of breath, and pneumonia (inflammatory disease of the lungs).

Panitumumab, Gemcitabine and Carboplatin in Triple-Negative Metastatic Breast Cancer [Recruiting]
In this Phase II trial, the investigators will evaluate the combination of gemcitabine, carboplatin, and panitumumab in the treatment of patients with metastatic triple-negative breast cancer. In addition, to assess the efficacy of this combination, tumor tissue will be examined for the presence of various markers, including K-ras and PI3K-activating mutations, EGFR, PTEN, and p53. Correlation of tumor response with marker expression may define a patient subset that is particularly responsive to treatment with a panitumumab-containing combination.

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Reports of Suspected Vectibix (Panitumumab) Side Effects

Rash (22)Death (13)Dyspnoea (13)Disease Progression (12)Skin Toxicity (10)Skin Reaction (8)DRY Skin (8)Diarrhoea (8)Pulmonary Embolism (7)Eczema (7)more >>

Page last updated: 2015-07-22

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