Implications of Insulin-like Growth Factor 1 Receptor Activation in Lung Cancer

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Journal name: The Malaysian Journal of Medical Sciences
Original article title: Implications of Insulin-like Growth Factor 1 Receptor Activation in Lung Cancer
The Malaysian Journal of Medical Sciences (MJMS) is a peer-reviewed, open-access journal published online at least six times a year. It covers all aspects of medical sciences and prioritizes high-quality research.
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Author:

Fariz Nurwidya, Sita Andarini, Fumiyuki Takahashi, Elisna Syahruddin, Kazuhisa Takahashi


The Malaysian Journal of Medical Sciences:

(A peer-reviewed, open-access journal)

Full text available for: Implications of Insulin-like Growth Factor 1 Receptor Activation in Lung Cancer

Year: 2016

Copyright (license): CC BY 4.0


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Summary of article contents:

Introduction

The insulin-like growth factor 1 receptor (IGF1R) has emerged as a critical focus in cancer research, particularly regarding lung cancer, due to its role in promoting tumor growth and survival. It is often overexpressed in lung cancer patients, with elevated circulating levels of insulin-like growth factor 1 (IGF1) being linked to an increased risk of developing lung malignancies. While several phase I clinical trials have highlighted the potential of IGF1R-targeted therapies in treating lung cancer, negative outcomes from phase III clinical studies suggest the need for more personalized approaches, particularly identifying patients who might benefit from these therapies.

IGF1R and Epithelial-Mesenchymal Transition in Lung Cancer

One important concept related to IGF1R in lung cancer is its involvement in epithelial-mesenchymal transition (EMT), which is a key process in cancer metastasis. Research indicates that IGF1R activation plays a substantial role in inducing EMT, characterized by changes in cell adhesion and increased migratory capabilities of cancer cells. In non-small cell lung cancer (NSCLC), IGF1R can activate transcription factors that facilitate the downregulation of epithelial markers such as E-cadherin while promoting mesenchymal markers. Furthermore, hypoxic conditions in tumor microenvironments have been shown to enhance IGF1 production, leading to IGF1R activation and the subsequent induction of EMT. This molecular crosstalk illustrates how IGF1R contributes to both cancer progression and therapy resistance, underscoring its potential as a therapeutic target.

Conclusion

Despite the initial promise of IGF1R as a therapeutic target in lung cancer, results from clinical trials highlight a complex landscape where resistance mechanisms often undermine efficacy. The dual role of IGF1R in promoting tumor survival and resistance to therapies points to the necessity for further investigations focusing on personalized treatment options that consider patient-specific molecular profiles. Future research should aim to refine patient selection for IGF1R-targeted therapies and explore combinations with other modalities to enhance treatment efficacy and overcome resistance, ultimately improving outcomes for lung cancer patients.

FAQ section (important questions/answers):

What role does IGF1R play in lung cancer?

IGF1R promotes cancer cell proliferation, survival, and influences disease progression in lung cancer. Its activation is linked to epithelial-mesenchymal transition and cancer stem cell maintenance, both contributing to malignancy.

How does IGF1R affect chemotherapy resistance in cancer therapy?

The activation of IGF1R has been implicated in the resistance of lung cancer cells to standard chemotherapy and targeted therapies, including EGFR-TKIs, through its influence on key signaling pathways like PI3K-Akt.

What clinical trials have investigated IGF1R inhibitors?

Several phase I to phase III clinical trials have tested IGF1R inhibitors in lung cancer. However, many trials reported disappointing results, highlighting the need for specific patient selection based on molecular signatures.

What implications does IGF1R expression have for lung cancer prognosis?

The prognostic role of IGF1R expression in lung cancer remains controversial. Some studies suggest it correlates with poor disease-free survival and can act as a biomarker for resistance to therapies in specific patient populations.

Glossary definitions and references:

Scientific and Ayurvedic Glossary list for “Implications of Insulin-like Growth Factor 1 Receptor Activation in Lung Cancer”. 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 growth and proliferation. It arises when the normal regulatory mechanisms that control cell growth and division fail, leading to the formation of tumors. The insulin-like growth factor 1 receptor (IGF1R) plays a significant role in cancer biology, influencing processes such as cell survival, proliferation, and metastasis. Elevated IGF1R levels have been associated with poor prognosis in various cancers, including lung cancer, making it a potential target for therapy.

2) Study (Studying):
Study refers to the systematic investigation and examination of subjects, phenomena, or clinical practices to further knowledge and understanding. In the context of cancer and IGF1R, various studies, both preclinical and clinical, investigate the role of IGF1R in cancer biology, treatment responses, and potential therapeutic strategies. Studying these interactions helps elucidate mechanisms of drug resistance and tumor behavior, informing better treatment approaches for cancer patients.

3) Drug:
A drug is a substance used for medical treatment to cure, prevent, or alleviate symptoms of disease. In cancer therapy, drugs can target specific pathways like IGF1R signaling to inhibit tumor growth or enhance therapeutic efficacy. Understanding the pharmacological effects of drugs targeting IGF1R is crucial in developing effective treatments for lung cancer and other malignancies.

4) Line:
In a medical context, 'line' often refers to lines of therapy or treatment protocols used sequentially or concurrently against disease. For example, first-line therapy is the preferred treatment given for a disease. Understanding the implications of IGF1R in different lines of treatment can help clinicians select appropriate strategies for patients based on their tumor biology.

5) Activity:
Activity refers to the biological or pharmacological actions of substances, including drugs, in the body. The activity of IGF1R and its inhibitors is crucial in determining their effectiveness in cancer treatment. Evaluating the activity of drugs targeting IGF1R helps assess their potential to overcome resistance and improve treatment outcomes in lung cancer patients.

6) Pur:
Poor refers to an unfavorable condition or inadequate quality, often related to prognosis or treatment outcomes in cancer patients. In studies of IGF1R, poor survival rates or responses are often linked to high IGF1R expression, suggesting its involvement in tumor aggressiveness and resistance to therapies, highlighting the need for targeted treatment approaches.

7) Table:
A table typically presents data in a structured format, allowing for comparison and analysis of various parameters. In the context of IGF1R research, tables are used to summarize findings from studies, such as treatment outcomes, drug efficacy, and genetic associations, facilitating a clearer understanding of complex data related to cancer biology and treatment.

8) Mutation:
Mutation refers to a change in the DNA sequence that can affect how genes function. In cancer, mutations can lead to altered protein expressions, including IGF1R, which can influence tumor behavior and treatment responses. Understanding the mutations in the IGF signaling pathway is critical for personalized cancer therapies targeting specific genetic alterations.

9) Beta:
Beta often denotes a subtype or variant within a category or system. For IGF signaling, beta refers to forms of receptors, such as IGF2, that can interact with IGF1R. This interaction can influence cellular processes, tumor growth, and metastasis in lung cancer, making it relevant in the context of therapeutic strategies.

10) Chemotherapy:
Chemotherapy is a cancer treatment that utilizes drugs to kill or impede cancer cell growth. Resistance to chemotherapy is a major challenge, and the role of IGF1R in promoting resistance is a significant area of study. Understanding how IGF1R mediates chemotherapy resistance can inform treatment approaches and potentially identify new therapeutic targets.

11) Ter:
The term 'ther' likely refers to 'therapy' or therapeutic strategies used in treating diseases. In cancer, therapies targeting the IGF1R are explored to improve treatment efficacy. Understanding the various therapeutic approaches involving IGF1R helps in developing effective cancer treatment regimens.

12) Radiotherapy:
Radiotherapy uses ionizing radiation to kill or damage cancer cells, often utilized in combination with chemotherapy. IGF1R signaling can influence the response to radiotherapy, with studies indicating that inhibiting IGF1R may sensitize cancer cells to radiation. This highlights the importance of understanding molecular interactions to optimize treatment outcomes in lung cancer.

13) Ramalingam:
Ramalingam refers to a prominent researcher in the field of oncology, specifically in studies concerning lung cancer and treatments. His contributions may include clinical research focusing on the interplay of IGF1R signaling and various therapies, providing insights that help understand treatment resistance mechanisms and improve patient outcomes.

14) Disease:
Disease refers to a pathological condition characterized by a disturbance in normal bodily functions, including cancer, which involves uncontrolled cellular proliferation. Recognizing the role of specific pathways, such as those involving IGF1R, is essential in understanding the biology and treatment of lung cancer and related malignancies.

15) Transformation (Transform, Transforming):
Transforming often relates to the process by which cells acquire malignant properties. In the context of IGF1R, its ability to drive transforming growth characteristics can lead to tumor development and progression. Studying this transformation helps in understanding cancer biology and developing therapies designed to block these pathways.

16) Accumulation (Accumulating, Accumulate):
Accumulated indicates the build-up or increase of certain factors or elements over time. In cancer research, the accumulated effects of IGF expression levels on tumor growth and treatment resistance are critical in understanding tumor behavior and informing treatment strategies that mitigate these effects, especially in lung cancer.

17) Developing:
Developing refers to the process of creating or formulating new therapies, interventions, or understanding mechanisms involved in diseases. In oncology, developing new drugs targeting pathways like IGF1R is imperative for advancing treatment options and improving outcomes for cancer patients, particularly those with resistant forms of the disease.

18) Animal:
Animal studies play a significant role in preclinical research, providing insights into the mechanisms of diseases and testing the efficacy of potential treatments. Research involving IGF1R in animal models contributes to understanding its role in lung cancer biology and helps in evaluating new therapeutic agents before human clinical trials.

19) Patel:
Patel represents a researcher known for contributions in cancer research, notably regarding signaling pathways such as IGF1R. His studies may explore the implications of IGF1R activation in various cancer types, aiding in the understanding of cancer progression and development of more effective therapies for patients.

20) Knowledge:
Knowledge encompasses the understanding and insights gained through studies and research. In the context of cancer and IGF1R, enhanced knowledge about the molecular mechanisms and signaling pathways informs the development of targeted therapies, ultimately aiming to improve treatment efficacy and patient care.

21) Family:
Family often refers to groups of related entities, including genes or biological processes. In cancer, understanding the family of insulin-like growth factor signaling pathways can elucidate how various receptors interact and contribute to tumor growth and therapy resistance, providing insights for targeted treatment approaches.

22) Pillai:
Pillai may refer to a researcher involved in cancer studies, particularly those focusing on IGF1R signaling and its role in treatment resistance. Insights from his work can contribute to understanding complex interactions in cancer therapy, aiding the effort to develop more effective treatment modalities for lung cancer patients.

23) Gupta:
Gupta often refers to a researcher known for contributions to cancer research, particularly regarding IGF signaling pathways. His studies may provide vital insights into how IGF1R influences tumor biology and treatment strategies, thereby shaping the future of personalized therapies in oncology.

24) Cilla:
Cilla could refer to a researcher contributing to the understanding of the role of IGF1R in cancer biology. Their work may focus on elucidating pathways involved in tumorigenesis and resistance, providing valuable information that aids in the development of effective therapeutic strategies.

25) Chang:
Chang could refer to a researcher whose work may be associated with investigating IGF1R's role in various cancer contexts. Their contributions could enhance understanding of the molecular mechanisms that govern drug response and development in lung cancer treatments.

26) Storm:
Storm often pertains to a researcher engaged in understanding the molecular pathways associated with cancer, potentially related to the IGF1R signaling pathway. Their research may involve exploring how these pathways affect tumor behavior and response to therapies, advancing knowledge in oncology.

27) Mela:
Mela may refer to a researcher studying the insulin-like growth factor signaling pathway in the context of lung cancer. Their work could provide crucial insights into how IGF1R influences tumor growth and response to treatments, contributing to advances in cancer management strategies.

28) Suda (Shuda):
Suda likely represents a prominent researcher focusing on lung cancer, specifically the role of IGF1R in therapy resistance. Insights from their studies enhance the understanding of mechanisms underlying drug resistance, informing strategies to optimize treatment approaches for patients with lung cancer.

29) Paik:
Paik refers to a researcher whose work may involve studying IGF1R's impact on lung cancer therapy and outcomes. Contributions from their research can help elucidate the intricacies of cancer signaling pathways, fostering the development of targeted therapies that enhance patient survival rates.

30) Sah:
Shah may denote a researcher actively investigating the involvement of IGF1R in cancer biology. Their work could examine how IGF signaling influences tumor development and treatment responses, ultimately aiding in devising effective cancer therapies, particularly for lung cancer patients.

31) King:
King potentially refers to a researcher known for their work on IGF1R signaling and its implications in oncology. Research contributions may focus on elucidating pathways involved in cancer proliferation and resistance, informing the development of therapeutic strategies targeting these pathways.

32) Pharmacological:
Pharmacological relates to the study or application of drugs and their effects on biological systems. Understanding the pharmacological properties of IGF1R inhibitors is vital for developing effective treatment regimens in cancer therapy, facilitating the design of drugs that effectively target cancer cells and improve patient outcomes.

33) Inflammation:
Inflammation refers to a biological response to harmful stimuli, including injury or infection. In cancer, inflammation can facilitate tumor growth and progression. Understanding the role of IGF1R in mediating inflammatory responses is essential for identifying therapeutic targets and managing cancer-related inflammation.

34) Detachment:
Detachment refers to the process of cells losing adherence to the surrounding tissue, which can significantly contribute to cancer metastasis. IGF1R's role in cellular detachment is crucial in understanding how cancer spreads and developing interventions to inhibit this process in lung cancer.

35) Vomiting:
Vomiting is a common side effect of many cancer treatments, including chemotherapy. Understanding the pharmacological impacts of IGF1R inhibitors on nausea and vomiting is crucial in improving side effect management for cancer patients undergoing treatment, enabling better quality of life during therapy.

36) Dividing:
Dividing refers to the cell division process where a single cell splits to form two daughter cells. In cancer, uncontrolled dividing is a hallmark of malignancy. IGF1R's role in promoting cell division highlights its relevance as a therapeutic target in managing uncontrolled cancer cell growth.

37) Nausea:
Nausea is an unpleasant sensation that often precedes vomiting, frequently experienced by cancer patients due to treatment side effects. Investigating the role of IGF1R inhibitors in managing nausea can help improve patient comfort and compliance with therapies, addressing a critical aspect of cancer care.

38) Nature:
Nature encompasses the natural world, including biological processes and systems. In cancer research, understanding the nature of signaling pathways, such as IGF1R, is fundamental in unraveling complex interactions that contribute to cancer development and response to therapies, guiding effective treatment strategies.

39) Shirna (Sirna):
siRNA refers to small interfering RNA, a class of double-stranded RNA molecules that play a role in regulating gene expression and silencing specific genes. Investigating the application of siRNA in targeting IGF1R can lead to novel therapeutic approaches, particularly in suppressing tumor proliferation in cancer cells.

40) Rules:
Rules in a scientific context often refer to established protocols or guidelines for conducting research. Understanding the rules governing IGF1R signaling mechanisms can help define experimental designs and inform cancer treatment development, ensuring adherence to protocols that enhance the reliability of research outcomes.

41) Death:
Death is the cessation of biological functions that sustain life. In the context of cancer treatment, understanding the relationship between IGF1R signaling and cellular apoptosis is vital for developing therapies that effectively induce cancer cell death, ultimately improving patient survival rates.

42) Blood:
Blood is a vital fluid that circulates through the body, delivering nutrients and oxygen while removing waste products. In cancer research, examining blood parameters and biomarkers can help assess the systemic impact of therapies, including IGF1R inhibitors, on overall health and treatment efficacy.

43) Medi:
Medi likely refers to the mediation of biological processes or pharmacological actions. Understanding how IGF1R mediates signaling pathways and influences cancer characteristics is crucial for developing targeted therapies that can effectively disrupt these pathways in lung cancer treatment.

44) Post:
Post typically refers to a stage or subsequent phase in a process. In cancer research, studying post-treatment outcomes, including responses to IGF1R-targeted therapies, is essential for evaluating treatment effectiveness, understanding therapy-induced changes, and informing future cancer treatment strategies.

45) Qian:
Qian might refer to a researcher contributing to the understanding of IGF1R signaling in lung cancer. Their research presumably focuses on elucidating the pathways influencing tumor biology and responses to therapy, enhancing our comprehension of how to effectively target cancer for better patient outcomes.

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Gene, Breast cancer, Patient, Clinical trial, Clinical studies, Preclinical studies, Pancreatic Cancer, Type 2 Diabetes Mellitus, Meta analysis, Retrospective study, Angiogenesis, Apoptosis, Drug resistance, Cancer therapy, Anti tumor activity, Antitumor activity, Combined treatment, Disease free survival, Cell proliferation, Pre-clinical studies, Phase II trial, Clinical implication, Colorectal Cancer, Metastasis, Tumor, Lung cancer, Tumor growth, Growth Hormone, Predictive biomarkers, Targeted therapy, Transcriptional regulation, Prognostic value, Pharmacokinetic study, Non-small cell lung cancer, Tumor progression, Receptor tyrosine kinase, Epidermal growth factor receptor, Insulin Receptor, Ligand binding, RNA Interference, Small molecule inhibitors, Insulin-like growth factor-1, Prognostic marker, Monoclonal antibodies, Tyrosine kinase inhibitor, Anaplastic lymphoma kinase, EGFR mutations, Prognostic Factor, Acquired resistance, Oncogene, Phase I clinical trial, Intrinsic resistance, Insulin-like growth factor, Epithelial mesenchymal transition, Cancer-associated fibroblasts, Gene transcription, Cancer biology, Stem cell, Cancer stem cell, Phase III studies, Cancer therapies, Progression-free survival, Monoclonal antibody, Small cell lung cancer, Phase III trial, Patient prognosis, Solid tumor, Chemotherapy resistance, Chemotherapy drug, Phase II Study, Phase III clinical trial, Tyrosine kinase, Phase I study, Molecular pathways, Future strategies, Green tea polyphenols, Metastatic colorectal cancer, Cancer therapy resistance, Hypoxic conditions, Proliferation and apoptosis, Clinical investigator, Phase II clinical trial, Prostate cancer cells, Signalling pathway, Advanced non-small-cell lung cancer, Small molecule, Lung cancer cells, Insulin-like growth factor receptor, Advanced solid tumors, Histone deacetylase inhibitor.

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