ER stress and UPR: key roles in health and disease.

| Posted in: Science

Journal name: World Journal of Pharmaceutical Research
Original article title: Role of endoplasmic reticulum stress and unfolded protein responses in health and disease
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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Original source:

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Author:

Shilpa Rattan, Shikhaa Mahajan, Suvarana Prasad, Sunita Manhas, Sunil Kumar, Rooma Devi


World Journal of Pharmaceutical Research:

(An ISO 9001:2015 Certified International Journal)

Full text available for: Role of endoplasmic reticulum stress and unfolded protein responses in health and disease

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

Doi: 10.20959/wjpr20177-8814


Download the PDF file of the original publication


Summary of article contents:

Introduction

The article by Shilpa Rattan et al. focuses on the role of endoplasmic reticulum (ER) stress and the unfolded protein response (UPR) in various health conditions and diseases. The ER is essential for various cellular functions, including protein synthesis, folding, and calcium homeostasis. Disruptions in the ER can lead to stress, prompting cellular responses that affect metabolism and cell survival. Prolonged ER stress is implicated in several diseases, including neurodegenerative disorders, diabetes, inflammation, and cancer.

Unfolded Protein Response and Disease Mechanisms

One of the key concepts discussed is the Unfolded Protein Response (UPR), which is triggered when the ER experiences stress due to factors like the accumulation of misfolded proteins and disruptions in calcium levels. The UPR involves a complex signaling network that aims to restore ER function by reducing global protein synthesis and increasing the levels of molecular chaperones that assist in proper protein folding. If these adaptive mechanisms fail, the UPR can lead to apoptosis, contributing to the pathogenesis of various diseases, including diabetes and neurodegenerative conditions like Alzheimer's and Parkinson's disease.

ER Stress and Neurodegenerative Diseases

The article outlines the significant connection between ER stress and neurodegenerative diseases. Accumulation of misfolded proteins is a hallmark of conditions such as Alzheimer's and Parkinson's disease. Perturbations in the UPR pathways, driven by ER stress, can lead to neuronal cell death. For instance, mutations affecting proteins like presenilin can further aggravate ER stress, disrupt normal cellular signaling, and exacerbate the deposition of toxic protein aggregates. Understanding these pathways opens avenues for potential therapeutic strategies targeting ER stress-related mechanisms in neurodegeneration.

ER Stress and Metabolic Disorders

Another essential aspect discussed is the relationship between ER stress and metabolic disorders, particularly diabetes. ER stress may link obesity and insulin resistance, impeding β-cell function and survival in the pancreas. The article explains how inflammatory mechanisms activated due to ER stress can lead to β-cell apoptosis, highlighting the role of various stress sensors in these processes. By recognizing the connections between ER stress and metabolic diseases, researchers can develop targeted interventions to mitigate the effects of prolonged ER stress and improve cellular health in insulin-related disorders.

Conclusion

In conclusion, the role of the endoplasmic reticulum and its stress response mechanisms are crucial in maintaining cellular homeostasis. The research presented underscores how both acute and chronic ER stress can dictate the onset of various diseases through compromised protein folding and cellular survival mechanisms. The findings offer vital insights into the complexities of disease mechanisms and emphasize the necessity for ongoing research into targeting ER stress as a therapeutic approach in numerous health conditions.

FAQ section (important questions/answers):

What is the role of the endoplasmic reticulum (ER) in cells?

The endoplasmic reticulum (ER) is responsible for protein synthesis, folding, lipid synthesis, maintaining calcium homeostasis, and post-translational modifications, making it crucial for cell survival and function.

What is ER stress, and what causes it?

ER stress occurs when there is an accumulation of misfolded proteins in the ER, caused by factors like calcium imbalances, oxidative stress, or chemical insults, disrupting its normal function.

How does the unfolded protein response (UPR) relate to ER stress?

The unfolded protein response (UPR) is activated in response to ER stress, aiming to restore cellular homeostasis by reducing protein synthesis, enhancing chaperone production, and promoting the degradation of misfolded proteins.

What diseases are associated with prolonged ER stress?

Prolonged ER stress is implicated in various diseases, including neurodegenerative disorders like Alzheimer’s and Parkinson’s, diabetes, cancer, and osteoporosis, often leading to cellular dysfunction or apoptosis.

What role does oxidative stress play in ER stress?

Oxidative stress contributes to ER stress by producing reactive oxygen species (ROS), leading to protein damage and enhancing the accumulation of misfolded proteins, ultimately disrupting cellular functions.

How does ER stress influence inflammation in diseases?

ER stress activates inflammatory responses by inducing the unfolded protein response, which subsequently triggers pathways involving nuclear factor kappa B (NF-κB), linking it to various chronic inflammatory diseases.

Glossary definitions and references:

Scientific and Ayurvedic Glossary list for “ER stress and UPR: key roles in health and disease.”. 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) Disease:
Disease signifies a pathological condition affecting normal bodily functions, often characterized by specific symptoms and signs. In the context of the text, diseases are linked to endoplasmic reticulum (ER) stress, including neurodegenerative disorders like Alzheimer's and Parkinson's disease, highlighting the significance of ER homeostasis in health.

2) Cancer:
Cancer is a group of diseases involving abnormal cell growth that can invade or spread to other parts of the body. The text discusses how ER stress and the unfolded protein response (UPR) play critical roles in cancer cell survival, proliferation, and resistance to therapy, emphasizing UPR's role in tumorigenesis.

3) Death:
Death refers to the permanent cessation of biological functions that sustain a living organism. The text outlines how prolonged ER stress can trigger apoptotic pathways leading to cell death, particularly in conditions such as neurodegenerative diseases and cancer, thus stressing the importance of cellular stress responses.

4) Accumulation (Accumulating, Accumulate):
Accumulated describes the state of being built up or collected over time. It emphasizes the importance of accumulated misfolded proteins within the ER, a critical factor leading to UPR activation. This condition is integral to the pathological processes discussed in various diseases.

5) Ambala:
Ambala is a city in Haryana, India, referenced as the location where the research was conducted. The geographic context provides a backdrop for the study's relevance, indicating its potential impact on regional health concerns and contributions to the scientific community within that area.

6) India:
India serves as the geographical location of the research team and implies a broader relevance to public health issues within the country. The study contributes to understanding common diseases impacted by ER stress, which could hold implications for healthcare policies and scientific advancement in India.

7) Inflammation:
Inflammation is the immune response to infection, injury, or harmful stimuli. The text connects inflammation to ER stress, where UPR activation can initiate inflammatory pathways, linking chronic inflammation to various diseases, including respiratory and diabetes-related issues, thus emphasizing the complex interplay of cellular responses to adversity.

8) Activity:
Activity indicates the functional engagement or performance of biological processes. In the context of the text, the term relates to the biological activity of ER stress sensors and their role in regulating UPR pathways, influencing cellular function during stress responses related to disease.

9) Species:
Species refers to a group of organisms capable of interbreeding. In biological research, it often discusses model organisms used to study disease mechanisms. The text emphasizes the relevance of findings that may apply across species, particularly when considering the evolutionary conservation of stress response pathways.

10) Hand:
Hand might signify a specific connection to human health or care, though it’s not elaborated in detail within the text. In broader terms, it could imply humanity's role in observing and addressing health conditions related to ER stress and its consequences on well-being.

11) Quality:
Quality in this context may refer to the standards of cellular health and function, particularly relating to protein synthesis and folding. The text links the quality control mechanisms of the ER to disease processes, where failure in quality control contributes to protein misfolding and subsequent stress.

12) Post:
Post typically refers to something that occurs after a specific event. In the context of the text, it may refer to conditions or states following cellular stress responses, particularly in discussing outcomes related to UPR activation and implications for health and disease management.

13) Life:
Life represents the state of living organisms characterized by growth, reproduction, and responsiveness to stimuli. The text underscores life implications concerning cellular processes, ER health, and how disturbances impact overall health, longevity, and disease susceptibility in human beings.

14) Human body:
The human body signifies the complete structure of an individual, including all systems and organs. The text discusses the impact of ER stress on overall bodily function, emphasizing how disruptions in cellular processes can lead to various systemic illnesses affecting human health.

15) Observation:
Observation refers to the act of monitoring or noting phenomena. The article relies on scientific observations of ER stress responses and their implications in diseases, supporting the conclusions drawn about the connection between UPR activation and the progression of various health conditions.

16) Inference:
Inference denotes a conclusion drawn from evidence or reasoning. The text encourages inferences regarding the relationship between ER stress and various diseases, suggesting that disturbances in protein folding pathways contribute to the mechanisms underlying several chronic health conditions.

17) Mutation:
Mutation signifies a change in the DNA sequence that may lead to alterations in protein function. The text discusses mutations in proteins like presenilin, highlighting how such genetic changes can affect ER stress responses and influence diseases such as Alzheimer's and Parkinson's.

18) Channel:
Channel often refers to proteins that facilitate the movement of ions across cell membranes. In the text, calcium channels are discussed concerning their roles in ER stress and cellular signaling, emphasizing how calcium dynamics influence health and the pathology of diseases.

19) Mineral:
Mineral broadly refers to naturally occurring inorganic substances vital for various biological functions. In the context of the text, calcium—a critical mineral—plays a significant role in cell signaling and ER function, where its dysregulation is linked to stress responses and disease outcomes.

20) Surface:
Surface typically relates to the outermost layer of something. In biological contexts, it can pertain to membrane structures interacting with external factors. The text does not focus heavily on surface but may imply its significance in cellular signaling and protein interactions during stress responses.

21) Family:
Family represents a group of related organisms or entities. In the context of health and disease, it can refer to the similarity of stress responses across different organisms and the evolutionary connection of biological processes, emphasizing the shared mechanisms of ER stress across diverse species.

22) Reason:
Reason indicates the cause or justification for an action or phenomenon. The text outlines the reasoning behind connections established between ER stress and various diseases, reinforcing the critical importance of unmediated pathways in cellular health and disease progression.

23) Kumar:
Kumar is likely a reference to one of the researchers involved in the study. It personalizes the research, contributing to a sense of community in scientific endeavors and the collaborative nature of addressing health issues associated with ER stress.

24) Fever:
Fever is a rise in body temperature often associated with infection or inflammation. The text discusses fever in the context of the immune response, indicating how ER stress can activate pathways that mediate inflammatory responses related to febrile conditions.

25) Devi:
Devi is possibly another author involved in the research. Similar to 'Kumar', it underscores collaboration in scientific research, linking individuals to the wider investigation of health implications due to ER stress and related pathways.

26) Pur:
Poor may relate to insufficient health status or inadequate cellular function. Within the context of the text, it could imply the detrimental effects of ER stress on cellular homeostasis and the resulting poor health outcomes associated with diseases discussed.

Other Science Concepts:

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Discover the significance of concepts within the article: ‘ER stress and UPR: key roles in health and disease.’. Further sources in the context of Science might help you critically compare this page with similair documents:

Diabetes mellitus, Alzheimer's disease, Insulin resistance, Oxidative stress, Reactive oxygen species, Parkinson's disease, Osteoporosis, Inflammatory response, Malignant cells, Protein misfolding.

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