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FDA Approves Abemaciclib to Treat Women With Certain Breast Cancers

FDA Approves Abemaciclib to Treat Women With Certain Breast Cancers

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Abemaciclib was approved by FDA for treating postmenopausal women with certain types of breast cancer in combination with aromatase inhibitors in whom cancer has progressed despite the endocrine therapy.

Highlights:
  • Abemaciclib is approved by FDA for treating women with hormone receptor (HR) 2 positive, human epidermal growth factor receptor (HER) 2 negative advanced or metastatic breast cancer.
  • It can be treated as a monotherapy or combination therapy depending upon the type of breast cancer and the treatment history.
  • The new treatment with abemaciclib has been found to be an effective and safe mode of therapy that delays the need for chemotherapy infusion and the infusion-related side effects.
Breast cancer is the most common cause of cancer in women. It occurs due to uncontrollable growth of breast cells as a result of mutation or abnormality of genes responsible for regulating the growth of cells. Breast cancer can occur either in the milk-producing glands or in the ducts or passages that drain milk. If not treated initially the cancer cells can spread to the nearby healthy tissues or underarm lymph nodes. A mammogram is recommended for people who have a family history of breast cancer or ovarian cancer and for women who are 40 years and above.

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FDA approves Abemaciclib for treating HR-positive or metastatic breast cancer

Abemaciclib approved for treating women with hormone receptor 2 positive and human epidermal growth factor receptor 2 negative advanced or metastatic breast cancer. Abemaciclib can be given as a monotherapy in breast cancer treated with hormone therapy and chemotherapy. A combination of abemaciclib with fulvestrant can also be considered for women with breast cancer who have been already treated with endocrine therapy.
MONARCH 1 and MONARCH 2 were the trials carried out to study the safety and efficacy of abemaciclib. However, results of MONARCH 3 clinical trial led to the FDA approval as the trial showed an increase in the progression-free survival (PFS) for the period women lived longer without the progression of cancer. MONARCH 3 was a randomized, double-blinded, placebo-controlled, multicenter clinical trial which involved 493 patients.

In MONARCH 3 clinical trial, patients were given abemaciclib 150 mg orally twice a day or placebo along with letrozole or anastrozole, an aromatase inhibitor. Patients who received abemaciclib showed an estimated median PFS of about 28.2 months, whereas patients received placebo showed a PFS of 14.8 months. The recommended dose of abemaciclib is 150 mg prescribed with an aromatase inhibitor twice daily taken orally with or without food.

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What are the common side effects of abemaciclib?

  • Nausea and vomiting
  • Fatigue
  • Anemia
  • Loss of hair
  • Decreased white blood cells
  • Low neutrophils count
  • Occurrence of infections
  • Diarrhea
  • Pain in the stomach
  • Decreased appetite

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What are the symptoms of breast cancer?

  • Soreness of nipples
  • Formation of new lumps
  • Nipple discharge
  • Turning inward or retraction of nipples
  • Swollen breasts with red rashes
  • Pain in the nipples or breast
  • Lumps in the underarm area
  • Irritation of breast skin

What are the risk factors for breast cancer?

  • Old age
  • Mutation of genes of BRCA 1 and BRCA 2
  • Obesity
  • Dense breasts
  • Hormone replacement therapy
  • Taking birth control pills
  • Alcohol consumption
  • Having children at a later age
References:
  1. FDA Approves Abemaciclib for Certain HR+ Metastatic Breast Cancers - (http://www.lbbc.org/news-opinion/fda-approves-abemaciclib-certain-hr-metastatic-breast-cancers)
  2. FDA approves abemaciclib as initial therapy for HR-positive, HER2-negative metastatic breast cancer - (https://www.fda.gov/Drugs/InformationOnDrugs/ApprovedDrugs/ucm598404.htm)
  3. Abemaciclib Approval Expands Initial Treatment Options for Advanced Breast Cancer - (https://www.cancer.gov/news-events/cancer-currents-blog/2018/abemaciclib-fda-breast-cancer-first-line)
  4. Breast Cancer - (https://www.cancer.org.au/about-cancer/types-of-cancer/breast-cancer/)
  5. About Breast Cancer - (https://medlineplus.gov/breastcancer.html)
Source-Medindia


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