Abarelix, molecular formula C72H95ClN14O14, relative molecular weight 1416.52 g/mol. A white or almost white crystalline powder. It has low solubility and good solubility in organic solvents. It has certain optical properties, including melting point, pKa value, stability, and storage conditions. It is an artificially synthesized peptide drug mainly used for the treatment of prostate cancer. It is a peptide compound with important biological activity, widely used in drug development and biomedical research. Used to treat hormone sensitive advanced prostate cancer. It belongs to the category of drugs called GnRH antagonists. GnRH (gonadotropin-releasing hormone) antagonists can inhibit the production of gonadotropins (including luteinizing hormone and follicle stimulating hormone) in the body, thereby reducing the synthesis and secretion of androgens in the testes and slowing down the growth of prostate cancer. Please note that Shaanxi BLOOM Tech Co., Ltd. produces primary chemicals for scientific research purposes, not clinical drugs.
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Customized Bottle Caps And Corks:
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Chemical Formula |
C80H112ClN17O13 |
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Exact Mass |
1554 |
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Molecular Weight |
1555 |
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m/z |
1554 (100.0%), 1555 (86.5%), 1556 (37.0%), 1556 (32.0%), 1557 (27.7%), 1558 (11.8%), 1557 (10.4%), 1555 (6.3%), 1556 (5.4%), 1559 (3.1%), 1556 (2.7%), 1557 (2.3%), 1557 (2.3%), 1558 (2.2%), 1557 (2.0%), 1558 (1.7%), 1556 (1.1%) |
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Elemental Analysis |
C, 61.78; H, 7.26; Cl, 2.28; N, 15.31; O, 13.37 |
It is a gonadotropin-releasing hormone (GnRH) receptor antagonist used to treat hormone sensitive advanced prostate cancer. The following is a detailed explanation of the pharmacological properties of Abarelix:
1. GnRH receptor antagonistic effect
By binding to and blocking the activity of GnRH receptors in anterior pituitary cells, the GnRH signaling pathway is inhibited. This leads to inhibition of the hypothalamic pituitary testicular axis, reducing the secretion of luteinizing hormone (LH) and follicle stimulating hormone (FSH). In this way, the production of testosterone and other androgens in the testes is reduced.
2. Reduction of androgens
Due to the inhibition of GnRH receptor activity by this substance, it can reduce the synthesis and secretion of androgens in the testes. Under normal circumstances, the release of GnRH stimulates the release of LH and FSH from anterior pituitary cells, thereby promoting testicular synthesis and release of testosterone. However, the action of product inhibits this process, leading to a decrease in testosterone levels.
3. Long lasting effect
The advantage of having long-lasting and sustained effects. After a single injection, it can maintain a stable blood drug concentration in the body, continuously inhibit GnRH receptors, and reduce testosterone levels. This sustained effect can provide a long-lasting therapeutic effect on prostate cancer.
4. Quickly reduce testosterone levels
Compared to other GnRH antagonists, It has the characteristic of rapidly reducing testosterone levels. It can quickly inhibit the activity of GnRH receptors, thereby rapidly reducing testosterone levels after treatment begins. This is crucial for controlling the growth of prostate cancer and alleviating related symptoms.
5. The therapeutic effect of prostate cancer
Reducing testosterone levels can inhibit the growth and progression of prostate cancer. Prostate cancer is usually sensitive to androgens, which can stimulate the proliferation of cancer cells. The effect can reduce testosterone levels, thereby inhibiting the growth of cancer cells. This treatment method helps to control the progression of the disease and alleviate related symptoms.
Comparison of Abarek and Other Prostate Cancer Treatment Drugs
(1) LHRH agonist:
LHRH agonist is one of the commonly used therapeutic drugs for prostate cancer, which stimulates the pituitary gland to secrete LH and FSH, thereby stimulating the testes to secrete testosterone. However, LHRH agonists can cause a brief increase in testosterone levels in the early stages, which may exacerbate the condition. In contrast, Abarek, as a GnRH antagonist, can directly inhibit the secretion of LH and FSH, avoiding an increase in testosterone levels.
(2) Anti androgen drugs:
Anti androgen drugs inhibit the action of androgens by inhibiting androgen receptors or blocking the binding of androgens to receptors. However, anti androgen drugs usually need to be used in combination with LHRH agonists to achieve optimal effects. Abarek, as a standalone GnRH antagonist, can achieve castration effects.
(3) Chemotherapy drugs:
Chemotherapy drugs kill or inhibit tumor cells by inhibiting their growth and division. However, chemotherapy drugs typically have significant toxicity and side effects. In contrast, Abaruk, as a targeted therapy drug, has higher selectivity and lower side effects.
Research progress and future prospects
Although Abarek has been withdrawn from the market by the FDA, it still holds significant research value as the first GnRH antagonist approved for the treatment of advanced prostate cancer. In the future, with in-depth research on the mechanism of action and adverse reactions of Abaruk, as well as the development and application of new GnRH antagonists, the treatment of prostate cancer will become more diversified and personalized.
(1) Mechanism of action research:
In the future, further research will be conducted on the mechanism of action of Abaruk, including its interaction with LHRH receptors and its inhibitory effects on LH and FSH secretion. This will help to gain a deeper understanding of the pharmacological effects of Abaruk and provide a theoretical basis for the development of novel GnRH antagonists.
(4) Individualized treatment:
With in-depth research on the pathogenesis of prostate cancer, personalized treatment for prostate cancer will be achieved in the future. By using genetic testing, molecular typing, and other methods, personalized treatment plans can be developed for patients to improve treatment effectiveness and quality of life.
(2) Adverse reaction research:
In the future, further research will be conducted on the adverse reactions of Abaruk, including allergic reactions, QT interval prolongation, etc. This will help develop a more rational medication plan and reduce the incidence of adverse reactions.
(3) Research and development of new GnRH antagonists:
Based on the research foundation of Abarek, more new GnRH antagonists will be developed in the future. These new drugs will have higher selectivity and lower side effects, providing better treatment options for prostate cancer patients.
An effective pathway for synthesizing Abarelix ensures the purity and yield of the product through carefully designed reaction steps.
1.The protected D-Ala undergoes coupling reaction with the amino group of the amino resin shown in formula 1 under the action of condensation and activation reagents to obtain peptide resin 1. In this step, selecting appropriate condensation and activation reagents is crucial to ensure the smooth progress of the coupling reaction. Common condensation and activation reagents include but are not limited to EDC, DCC, HBTU, etc. This step needs to be carried out under appropriate temperature and pH conditions to facilitate the reaction.
2.Starting from peptide resin 1, the protected Pro, protected Lys (ipr, Z), protected Leu, protected D-Asn, protected N-Me Tyr, protected Ser, protected D-Pal, protected D-Cpa, and Ac-D-Nal were sequentially extended and coupled under the action of condensation and activation reagents, following the sequence from the C-terminus to the N-terminus of the Abarek amino acid sequence, to obtain Abarek peptide resin. In this step, it is crucial to ensure that each amino acid is coupled in the correct order and position. This step also needs to be carried out under specific temperature and pH conditions, and the reaction time and concentration need to be controlled to achieve the best reaction effect.
3.Abareck peptide resin is hydrolyzed by an acid hydrolysis agent to obtain crude Abareck. The selection of acid hydrolysis agents has a significant impact on the quality and yield of products. Select appropriate acid hydrolysis agents based on specific situations, and control the conditions of acid hydrolysis (such as temperature, time, concentration, etc.) to achieve the best acid hydrolysis effect.
4.Purify crude Abareck and convert it to salt to obtain pure Abareck. The purification step is a crucial step in ensuring the purity of the final product. Various separation and purification techniques, such as chromatography, precipitation, etc., can be used to further purify the crude Abarek product. The salt conversion step is to convert the crude Abarec product into a form suitable for further purification and crystallization, thereby improving the purity and stability of the product.
This method has the advantages of simple operation, mild conditions, and high product purity. Through carefully designed coupling reaction sequences and conditions, as well as effective purification and salt conversion steps, high-purity Abarelix was successfully synthesized. In addition, this method avoids the use of toxic and harmful organic solvents and conforms to the principles of green chemistry.
Scope of sales channels
Hospitals and clinics
Hospitals and clinics are one of the main channels for Abarek's sales. These institutions are usually equipped with professional medical teams, including urologists, oncologists, etc., who have the qualifications and ability to prescribe Abaruk. The pharmacies of large comprehensive hospitals and oncology hospitals usually stock prostate cancer treatment drugs such as Abaruk to meet the needs of inpatients and outpatients. Some clinics specializing in urology or oncology also provide prescription drugs such as Abaruk, making it convenient for patients to purchase medication nearby.
Retail pharmacies
Although Abarek is a prescription drug, in some countries and regions, retail pharmacies that meet certain conditions can also sell it. These pharmacies usually require professional pharmacists who can review and dispense patients' prescriptions. Some large chain pharmacies may collaborate with pharmaceutical companies or distributors to sell prescription drugs, including Abaruk. These pharmacies usually have a well-established drug supply chain and distribution system, which can provide convenient drug purchasing services for patients. Some independent pharmacies may also sell prescription drugs such as Abaruk, but their sales scope and variety may be relatively limited.
Frequently Asked Questions
What is Abarelix used for?
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It is primarily used in oncology to reduce the amount of testosterone made in patients with advanced symptomatic prostate cancer for which no other treatment options are available.
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