Cancer chemotherapy and cyclin dependent kinases

| Posted in: Science

Journal name: World Journal of Pharmaceutical Research
Original article title: Cancer chemotherapy and cyclin dependent kinases
The WJPR includes peer-reviewed publications such as scientific research papers, reports, review articles, company news, thesis reports and case studies in areas of Biology, Pharmaceutical industries and Chemical technology while incorporating ancient fields of knowledge such combining Ayurveda with scientific data.
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Author:

Mageshwaran Lakshmanan, Veerendra V, Patric Joshua P


World Journal of Pharmaceutical Research:

(An ISO 9001:2015 Certified International Journal)

Full text available for: Cancer chemotherapy and cyclin dependent kinases

Source type: An International Peer Reviewed Journal for Pharmaceutical and Medical and Scientific Research

Copyright (license): WJPR: All rights reserved


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Summary of article contents:

Introduction

Cyclin-dependent kinases (CDKs) are essential serine/threonine kinases that play a crucial role in regulating various cellular processes such as cell proliferation, the cell cycle, differentiation, and apoptosis through phosphorylation. Dysregulation of CDKs is commonly associated with numerous cancers, leading to uncontrolled cell growth and proliferation. This article reviews the significance of CDKs in cancer chemotherapy, explores the rationale behind targeting these kinases, and outlines the strategies for developing specific CDK inhibitors.

Role of CDKs in the Cell Cycle

The cell cycle is a tightly regulated series of events that results in cell growth and division. It consists of several phases: Gap-1 (G1), DNA Synthesis (S), Gap-2 (G2), and Mitosis (M), along with an extended resting phase known as Gap-0 (G0). CDKs, in complex with regulatory proteins called cyclins, govern the progression of these phases. Key CDK complexes, such as CDK1 with Cyclin B, facilitate the transition from G2 to M, while CDK2 paired with Cyclin E promotes the shift from G1 to S phase. The precise orchestration of these regulatory mechanisms highlights the significance of CDKs as bona fide regulators of the cell cycle.

CDK Aberrations and Cancer

CDK dysregulation can lead to abnormal cell division and the emergence of various cancers. The overexpression or amplification of specific CDKs has been correlated with numerous malignancies. For example, CDK4 amplification has been noted in melanoma and lung cancer, while mutations in CDK7 are associated with solid tumors. These aberrations disrupt the normal cell cycle by facilitating unchecked cell proliferation and the survival of mutated cells, marking CDKs as vital targets for cancer treatment.

Pharmacological Targeting of CDKs

Targeting CDKs with pharmacological inhibitors offers a promising strategy to induce cell cycle arrest and apoptosis in cancer cells. Different strategies have emerged for inhibiting CDKs, including ATP-competitive inhibitors that directly block the catalytic activity of CDKs. Examples of novel CDK inhibitors include Palbociclib, Dinaciclib, and R-roscovitine, which have demonstrated clinical efficacy through various mechanisms of action. These targeted therapies are poised to provide more precise and effective cancer treatments with potentially fewer side effects compared to traditional chemotherapy.

Conclusion

In conclusion, CDKs play a pivotal role in controlling cell growth, division, and transcription, making them important targets for cancer therapy. Despite substantial progress in developing specific CDK inhibitors, determining which kinase to target while minimizing impact on normal cellular functions remains a challenge. Drugs like Palbociclib, Dinaciclib, and others are at the forefront of advancing cancer treatment, but further studies are necessary to elucidate the full implications of CDK inhibition in tumorigenesis and ensure safe, effective therapeutic strategies.

FAQ section (important questions/answers):

What role do protein kinases play in cancer cells?

Protein kinases regulate cell processes such as proliferation, differentiation, and apoptosis through phosphorylation. Dysregulation of these processes due to abnormal expression can lead to uncontrolled proliferation characteristic of cancer cells.

How do cyclin-dependent kinases (CDKs) relate to cancer treatment?

CDKs are crucial for cell cycle regulation, and their inhibition can lead to cell cycle arrest and selective apoptosis in cancer cells. This provides a potential therapeutic target for cancer chemotherapy.

What are the potential drawbacks of targeting CDKs in cancer therapy?

The main challenge in targeting CDKs is determining which specific CDK or CDK/cyclin complex to inhibit, as this ensures the treatment's effectiveness while preserving vital cellular functions.

What are some examples of drugs that inhibit CDKs?

Notable CDK inhibitors include Palbociclib, Dinaciclib, and Flavopiridol. These drugs target various CDKs to interrupt cancer cell proliferation and progress in therapy.

How have CDK inhibitors progressed in cancer research?

Significant advancements have been made in developing specific CDK inhibitors, with several undergoing clinical trials. However, further research is necessary to understand their efficacy and safety.

What regulates the activity of cyclin-dependent kinases (CDKs)?

CDK activity is regulated by binding to cyclins, inhibitory CKIs, and through phosphorylation events that can either activate or inhibit their function.

Glossary definitions and references:

Scientific and Ayurvedic Glossary list for “Cancer chemotherapy and cyclin dependent kinases”. This list explains important keywords that occur in this article and links it to the glossary for a better understanding of that concept in the context of Ayurveda and other topics.

1) Cancer:
Cancer is a group of diseases characterized by uncontrolled cell division and growth. It arises from genetic mutations that disrupt normal regulatory mechanisms within cells, leading to the formation of tumors and the potential for metastasis. Understanding cancer biology is critical for developing effective therapies, particularly those targeting specific molecular pathways.

2) Drug:
A drug is a chemical substance that, when introduced into the body, alters physiological functions. In the context of cancer treatment, drugs can inhibit specific molecular targets, such as cyclin-dependent kinases (CDKs), and are crucial in pharmacotherapy to manage diseases and improve patient outcomes. Development and testing are essential for safety and efficacy.

3) Mutation:
A mutation refers to a change in the DNA sequence of a cell. These changes can be spontaneous or induced and may lead to alterations in protein function, contributing to diseases like cancer. Mutations often result in the dysregulation of pathways critical to cell cycle control and proliferation.

4) Pharmacology:
Pharmacology is the branch of medicine that studies the effects and mechanisms of drugs on biological systems. It encompasses drug discovery, development, therapeutic applications, and safety profiles. In cancer research, pharmacology focuses on identifying agents that can selectively target malignant cells while minimizing adverse effects in normal tissues.

5) Activity:
Activity, in pharmacological terms, refers to the effect that a drug has on biological processes. This includes how effectively a drug interacts with its molecular target, such as CDKs in cancer therapy. Understanding a drug's activity is fundamental to determining its therapeutic potential and efficacy in treating diseases.

6) Chemotherapy:
Chemotherapy is a type of cancer treatment that uses powerful chemicals to kill rapidly dividing cancer cells. It often targets various stages of the cell cycle but can also affect normal cells. The goal of chemotherapy is to reduce tumor size and prevent cancer spread, improving patient prognosis.

7) Tamilnadu (Tamil-nadu):
Tamilnadu is a state in southern India known for its rich culture and history. It is significant in healthcare and research, hosting numerous medical colleges and institutions dedicated to pharmacology and cancer research. The contributions from this region enhance the global knowledge base and innovation in medical science.

8) Chennai:
Chennai is the capital city of Tamilnadu and a major center for medical research and education in India. It boasts several reputed universities and hospitals, fostering advancements in numerous medical fields, including pharmacology and oncology, through research, clinical trials, and training of healthcare professionals.

9) India:
India is a country with a vast population and diverse medical practices. It plays a crucial role in global healthcare research, particularly in pharmaceuticals, and is a hub for studying diseases, including cancer. The country’s rich biodiversity contributes to drug discovery, while its research institutions strive for advancements in treatment methodologies.

10) Pharmacological:
Pharmacological pertains to the science of drugs and their interactions with biological systems. In the context of cancer treatment, pharmacological research aims to develop agents that can target specific pathways involved in tumor growth and survival, enhancing therapeutic effectiveness while minimizing side effects on healthy tissues.

11) Disease:
A disease is a pathological condition that disrupts normal bodily functions. Cancer is one such disease characterized by uncontrolled cell proliferation. Understanding the mechanisms behind diseases is essential for developing targeted therapies, improving patient outcomes, and enhancing the quality of care provided within the healthcare system.

12) Table:
In scientific literature, a table organizes data systematically, aiding in the presentation of complex information. It allows for a clear comparison of various parameters, such as the roles of cyclin-dependent kinases in different cancers, thereby facilitating understanding and interpretation of research findings and clinical data.

13) Transformation (Transform, Transforming):
Transformed cells are those that have undergone genetic changes enabling them to proliferate uncontrollably, characteristic of cancer cells. This transformation often involves mutations that bypass normal cell cycle regulations, leading to malignant behaviors such as invasion and metastasis, necessitating targeted therapeutic interventions.

14) Vomiting:
Vomiting is a common side effect associated with many cancer treatments, particularly chemotherapy. It leads to significant patient distress and can impact the overall treatment experience. Managing nausea and vomiting is crucial for maintaining quality of life and adherence to treatment regimens in cancer patients.

15) Entering:
Entering refers to a cellular process where a cell progresses into a new phase of the cell cycle, such as moving from G1 to S phase. This step is critical in cell proliferation; however, in cancers, this regulation may be disrupted, leading to uncontrolled growth and malignancy.

16) Family:
Family, in the context of biological sciences, refers to a group of related organisms or genes. In cancer research, understanding the familial relationships between genes and proteins can shed light on the pathways involved in tumorigenesis and inform the development of targeted therapies based on shared characteristics.

17) Nausea:
Nausea is a common gastrointestinal symptom that often accompanies cancer treatments like chemotherapy. Managing nausea is essential to ensure patient comfort and treatment compliance. Several pharmacological strategies are employed to mitigate this side effect, enhancing the overall therapeutic experience for cancer patients.

18) Accumulation (Accumulating, Accumulate):
Accumulation refers to the build-up of substances within cells, which can result from decreased degradation, enhanced uptake, or metabolic changes. In cancer cells, the accumulation of certain proteins or metabolites may contribute to tumor progression and resistance to therapies, making it an important target for drug development.

19) Inflammation:
Inflammation is the body's response to injury or infection, often characterized by redness, swelling, and pain. Chronic inflammation is linked to cancer development, as it may create a tumor-friendly environment. Understanding the role of inflammation in cancer biology can inform therapeutic strategies targeting these pathways.

20) Substance:
A substance is a form of matter with specific properties and composition, and in pharmacology, it refers to any chemical that can produce biological effects, including drugs. Identifying active substances that target cancer-specific pathways is essential for developing effective treatments and managing adverse effects in patients.

21) Flavonoid:
Flavonoids are a class of plant metabolites known for their antioxidant properties. They play a role in traditional medicine and have been studied for their potential antitumor activities. Understanding the pharmacological effects of flavonoids can lead to advancements in developing natural compounds for cancer therapy.

22) Repair:
Repair in a biological context refers to the restoration of cellular integrity following damage, such as DNA repair mechanisms that are crucial for preventing mutations that lead to cancer. Targeting repair pathways in cancer cells is a promising approach for developing therapies that exploit these vulnerabilities.

23) Indian:
Indian indicates the cultural, historical, and scientific contributions originating from India. In medical research, India's diverse biology and extensive clinical trials contribute to advances in understanding and treating diseases like cancer, leading to significant international collaborations and innovations in healthcare.

24) Study (Studying):
A study is a systematic investigation aimed at discovering or interpreting facts. In the context of cancer research, studies investigate the molecular mechanisms of tumorigenesis and treatment efficacy. Comprehensive studies contribute to the body of knowledge necessary for the advancement of clinical therapies and patient care.

25) Ras (Rash):
A rash refers to an area of skin that has become red, inflamed, or irritated. In cancer patients, rashes may be side effects of certain treatments or indicative of allergic reactions. Monitoring skin reactions is important for managing treatment regimens and ensuring patient safety and comfort.

26) Line:
Line in a medical context often refers to the lineage of cells or the sequence of therapies used in treatment protocols. Understanding treatment lines is vital for determining the most appropriate therapeutic approach for individual cancer patients, ensuring that subsequent lines of therapy are both effective and tolerable.

27) Pur:
Poor in medical contexts often refers to inadequate health outcomes or suboptimal responses to treatments. In cancer therapy, poor response rates may necessitate novel therapeutic strategies or the development of more efficacious agents, emphasizing the need for ongoing research and innovation in oncology.

Other Science Concepts:

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Discover the significance of concepts within the article: ‘Cancer chemotherapy and cyclin dependent kinases’. Further sources in the context of Science might help you critically compare this page with similair documents:

Differentiation, Clinical data, Physiological function, Breast cancer, Cell biology, Clinical trial, Apoptosis, Biological system, Cancer treatment, Tumorigenesis, Cancer chemotherapy, Regulatory proteins, Cell growth, Tyrosine kinase inhibitor, Cell cycle arrest, Cell cycle, Malignancies, Phase I clinical trial, Retinoblastoma protein, Safety and tolerability, Potential drug, Alternative splicing, Phase I trial, Protein kinase, Phosphorylation, Tumour growth, Cyclin dependent kinase, Cell cycle phase, Cyclin-dependent kinase inhibitor.

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