Review of oxidative stress mechanisms in Parkinson's and biomarkers.
Journal name: World Journal of Pharmaceutical Research
Original article title: Review on potential mechanisms involved in oxidative stress in the pathogenesis of parkinson’s disease and the role of biomarkers
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Dr. Manjunatha P. Mudagal, Gayathry P., Akhila N. R., Akanksh Das, Kmenlang Sutong and Vibhu Bhardwaj
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Full text available for: Review on potential mechanisms involved in oxidative stress in the pathogenesis of parkinson’s disease and the role of biomarkers
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Summary of article contents:
Introduction
Parkinson’s disease (PD) is a prevalent, multifactorial neurodegenerative disorder characterized by the degeneration of dopaminergic neurons in the Substantia nigra pars compacta (SNpc), leading to dopamine deficiency. Symptoms include a range of motor features such as tremors, bradykinesia, and rigidity, alongside non-motor symptoms like anxiety and cognitive impairment. The disease also involves the accumulation of Lewy bodies made up primarily of alpha-synuclein. A critical aspect of the pathogenesis of PD is oxidative stress, which is caused by an imbalance between reactive oxygen species (ROS) and the antioxidant defense mechanisms in the body. Understanding the mechanisms underlying oxidative stress and identifying reliable biomarkers for PD are essential for diagnosis and treatment.
The Role of Oxidative Stress in Parkinson's Disease
Oxidative stress has emerged as a key player in the progression of Parkinson’s disease, significantly contributing to dopaminergic neuronal degeneration. Reactive oxygen species, including superoxide radicals and hydrogen peroxide, can damage cellular structures such as lipids, proteins, and DNA. In the context of PD, ROS generation is often linked with mitochondrial dysfunction, where impaired electron transport leads to increased ROS production. Other factors, such as elevated levels of iron and calcium, exacerbate oxidative damage. This mechanism elucidates how oxidative stress may trigger neuronal death, promoting the characteristic features of Parkinson's disease.
Neuroinflammation as a Contributing Factor
Neuroinflammation is another crucial factor implicated in the pathogenesis of Parkinson’s disease. Activated microglia and reactive astrocytes contribute to an inflammatory environment that causes further neuronal damage. Microglial activation leads to the release of pro-inflammatory cytokines and ROS, perpetuating a vicious cycle of inflammation and oxidative stress. Similarly, astrogliosis can result in the production of additional inflammatory mediators, exacerbating neuronal degeneration. This inflammatory response not only affects the dopaminergic neurons but can also lead to broader neuronal impairment throughout the nervous system.
Biomarkers for Parkinson's Disease
Identifying reliable biomarkers for Parkinson's disease is essential for early diagnosis and monitoring disease progression. Various potential biomarkers linked to oxidative stress and inflammation have been explored, including 8-hydroxydeoxyguanosine (8-OHdG), glutathione, and coenzyme Q10. Changes in these biomarkers can reflect the neurodegenerative processes occurring in PD. For instance, reduced levels of glutathione in the substantia nigra of PD patients indicate decreased antioxidant capacity and increased vulnerability of neurons to oxidative damage. Monitoring these biomarkers can help clinicians assess therapeutic responses and manage the disease more effectively.
Conclusion
In summary, Parkinson’s disease is a complex disorder influenced by oxidative stress, neuroinflammation, and the presence of specific biomarkers. The interplay between these factors contributes to the progressive degeneration of dopaminergic neurons. While the mechanisms of Parkinson’s disease remain somewhat elusive, ongoing research is crucial to unraveling its complexities. Early identification of oxidative stress and inflammatory biomarkers holds promise for enhancing diagnostic accuracy and therapeutic approaches, ultimately improving patient care in those affected by this debilitating disease. Understanding these processes is vital for developing targeted interventions that could potentially slow disease progression or improve overall quality of life for patients.
FAQ section (important questions/answers):
What is Parkinson's disease and its primary cause?
Parkinson's disease is a chronic neurodegenerative disorder caused by the degeneration of dopaminergic neurons in the substantia nigra, leading to dopamine deficiency and various motor and non-motor symptoms.
What role does oxidative stress play in Parkinson's disease?
Oxidative stress contributes to the progression of Parkinson's disease by generating reactive oxygen species, which damage cellular macromolecules, impair mitochondrial function, and promote neuroinflammation.
What are Lewy bodies and their significance in Parkinson's disease?
Lewy bodies are protein aggregates primarily composed of alpha-synuclein. Their accumulation in neurons characterizes Parkinson's disease and is associated with neuronal dysfunction and cell death.
How important are biomarkers for diagnosing Parkinson's disease?
Reliable biomarkers are crucial for early diagnosis and monitoring of Parkinson's disease progression and therapeutic response. They differentiate it from other conditions and assess the disease state.
What are some potential biomarkers for Parkinson's disease?
Potential biomarkers include 8-hydroxydeoxyguanosine, glutathione, antioxidant levels, lipid peroxidation products, and brain-derived neurotrophic factors, all potentially reflecting oxidative stress and disease progression.
What factors increase the risk of developing Parkinson's disease?
Risk factors include genetic predispositions, exposure to environmental toxins, aging, and certain lifestyle choices, contributing to the complex interaction causing the disease.
Glossary definitions and references:
Scientific and Ayurvedic Glossary list for “Review of oxidative stress mechanisms in Parkinson's and biomarkers.”. 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:
Diseases refer to pathological conditions impacting health and function. In the context of neurological disorders, diseases like Parkinson’s illustrate the complexity of neurodegeneration, highlighting the need for research to understand underlying mechanisms and develop effective treatments for those affected.
2) Mutation:
Mutation indicates a permanent alteration in the DNA sequence that can lead to changes in phenotype or function of genes. In the context of Parkinson's disease, specific mutations in genes like alpha-synuclein and PARK2 are linked to the hereditary forms of the condition, highlighting genetic vulnerabilities.
3) Manjunatha:
Manjunatha refers to Dr. Manjunatha P. Mudagal, the first author of the research article on Parkinson's disease. His contributions to the study enhance our understanding of the disease's mechanisms and potential biomarkers, addressing the multifactorial nature of neurodegeneration and oxidative stress involved in this disorder.
4) Death:
Death in this context signifies the ultimate loss of life that can result from progressive neurodegenerative diseases like Parkinson's disease. The degeneration of dopaminergic neurons leads to debilitating symptoms, significantly reducing the quality of life and potentially leading to mortality through complications associated with the disease.
5) Species:
Species indicates a group of organisms that share common characteristics and can interbreed. In the study of Parkinson's disease, understanding the impact on various species helps in comparisons and developing animal models for research, thereby aiding in the exploration of the disease's pathogenesis and potential treatments.
6) Accumulation (Accumulating, Accumulate):
Accumulation pertains to the buildup of substances within biological systems. In Parkinson's disease, the accumulation of alpha-synuclein proteins leads to the formation of Lewy bodies which disrupt normal cellular functions and contribute to neuronal death, thereby playing a crucial role in the disease's pathogenesis.
7) Activity:
Activity refers to the operational function of biological systems or molecules. The activity of neurons, neurotransmitters, and enzymes is critical in Parkinson’s disease, as altered neuronal activity due to oxidative stress and other pathological events underlies the motor and cognitive symptoms observed in affected individuals.
8) Drug:
Drugs are substances used for medical treatment to restore health or alleviate symptoms. In Parkinson's disease therapy, various drugs aim to manage symptoms by mimicking or enhancing dopamine effects, highlighting the importance of pharmacological strategies in treating neurodegeneration and improving quality of life.
9) Transformation (Transform, Transforming):
Transform indicates a significant change in form or appearance. In Parkinson’s disease, the transformation of neuronal structures and neurotransmitter activity due to pathological processes leads to progressive dysfunction, highlighting the disease's impact on brain health and necessitating targeted therapeutic approaches.
10) Substance:
Substance refers to a particular kind of matter with uniform properties. In this study, substances such as alpha-synuclein and various oxidative agents are critically analyzed for their roles in the pathogenesis of Parkinson’s disease, with emphasis on how they contribute to neuronal damage and disease progression.
11) Family:
Family in biological terms refers to a classification level of related species. In Parkinson’s disease's genetic context, understanding familial relationships helps identify genetic mutations that may lead to inheritance patterns and pathophysiological mechanisms that underpin the hereditary forms of this neurodegenerative disorder.
12) Hand:
Hand may indicate manual dexterity and the ability to perform tasks. In Parkinson’s disease, motor symptoms often impair hand function, resulting in difficulty with daily activities. This points towards the broader implications of motor control and the need for rehabilitation efforts to improve quality of life.
13) Pharmacology:
Pharmacology is the branch of medicine that deals with the study of drug action. In Parkinson's disease, pharmacology plays a crucial role in developing treatments that manage symptoms, address oxidative stress, and target underlying neuropathological mechanisms, aiming to improve patient outcomes and quality of life.
14) Surrounding:
Surrounding refers to the environment or area encircling something. In the context of Parkinson's disease, the surrounding microenvironment of neurons, influenced by neuroinflammation and oxidative stress, significantly affects neuronal health and contributes to the progression of neurodegeneration within affected brain regions.
15) Observation:
Observations refer to the systematic examination or monitoring of phenomena. In the context of research on Parkinson's disease, observations of clinical symptoms, biomarker levels, and treatment responses are fundamental for deriving conclusions about pathogenesis, evaluating therapeutic efficacy, and developing strategies for managing the disease.
16) Karnataka:
Karnataka is a state in India where the research was conducted. The geographical context enriches the study by providing insights into local prevalence rates, demographic factors, and potential environmental influences affecting the incidence of Parkinson’s disease, thus impacting the relevance of findings to specific populations.
17) Account:
Account here refers to reporting or narrating a specific case or study. In Parkinson's research, detailed accounts of patient symptoms, treatment outcomes, and biochemical findings are essential for drawing conclusions about disease mechanisms and developing effective biomarkers for early diagnosis and treatment monitoring.
18) India:
India is the country of the research origin. The population genetics, environmental exposures, and healthcare dynamics within India provide a unique backdrop for studying Parkinson's disease, offering potential insights into regional variations in disease manifestation, incidence, and responsiveness to treatment approaches.
19) Water:
Water is essential for all living organisms. In the context of neurobiology and oxidative stress, water participates in biochemical reactions and plays a role in cellular hydration and homeostasis. Its importance underscores the need for maintaining physiological functions relevant to brain health and neuroprotection.
20) Table:
Table often refers to an organized collection of data or information. In scientific research, tables help summarize findings, such as symptomatology or biomarker levels in Parkinson's disease. This organized representation can highlight key data comparisons and allow for easier interpretation and review of results.
21) Blood:
Blood is a vital fluid transporting oxygen and nutrients across the body. In Parkinson's disease, analysis of blood biomarkers provides insight into oxidative stress, inflammatory responses, and possible neuronal damage, contributing to our understanding of disease mechanisms and potential targets for therapeutic intervention.
22) Beta:
Beta may refer to various biological entities, such as beta-amyloid in Alzheimer's research. In Parkinson's disease, understanding beta variations or interactions (for instance, with neurotransmitters) can provide insights into pathogenic processes, connecting pathways of different neurodegenerations and possible therapeutic strategies.
23) Line:
Line can refer to alignment or connection, particularly in genetics or evolutionary biology. In the context of Parkinson's disease, the lineages of genetic mutations inform the understanding of familial inheritance patterns and gene-environment interactions that could elucidate disease susceptibility and progression mechanisms.
24) Post:
Post generally indicates something that comes after or subsequent to an event. In Parkinson's disease studies, post-mortem analyses of brain tissues are crucial for understanding the pathology, revealing insights into neurodegeneration processes and validating biomarkers for diagnosis and progression tracking in living patients.
25) Genetic defect:
Genetic defect refers to the alterations in genes that may result in disease conditions. In Parkinson's disease, genetic defects such as mutations in the SNCA or PARK2 genes provide insight into hereditary forms, uncovering critical mechanisms that contribute to dopaminergic neuron degeneration and disease pathology.
26) Human body:
Human body represents the physical structure and biological functions essential for life. In the scope of neurodegenerative diseases like Parkinson’s, understanding interactions between the central nervous system and the body is critical in elucidating how systemic factors contribute to disease development and symptomatology.
27) Transmission:
Transmission refers to the passage of characteristics or agents from one entity to another. In Parkinson's disease, transmission can indicate the spread of neuroinflammatory signals or toxic agents, highlighting potential pathways of neurodegeneration and the complex interplay between genetic and environmental influences.
28) Inflammation:
Inflammation is an immune response to injury or infection. In Parkinson's disease, chronic neuroinflammation contributes to neuronal damage, with activated microglia and the release of pro-inflammatory cytokines playing roles in exacerbating oxidative stress, leading to further neuronal degeneration and disease progression.
29) Performance:
Performance encompasses function or capability, especially in a biological or psychological context. In Parkinson's disease, cognitive and motor performance declines due to neurodegeneration. Assessing performance aids in tracking disease progression and effectiveness of interventions, guiding treatment plans and patient care.
30) Annihilation (Annihilate, Annihilated):
Annihilated refers to the complete destruction or obliteration of something. In the context of Parkinson’s disease, annihilated refers to the loss of dopaminergic neurons, highlighting the severity of neurodegeneration and underscoring the need for biomarkers and therapeutic strategies to mitigate neuronal death.
31) Perception:
Perception refers to the awareness of sensory information and how it is interpreted by the brain. In Parkinson’s disease, altered perception can manifest in various cognitive deficits, impacting the quality of life of patients and necessitating comprehensive approaches to address these challenges in treatment.
32) Reflecting:
Reflecting indicates the consideration or manifestation of certain qualities or states. In the context of Parkinson's disease, reflecting on research findings can provide insights into disease mechanisms, symptom management, and the overall impact of oxidative stress on patient health and treatment effectiveness.
33) Swallowing:
Swallowing refers to the act of taking food or liquid into the body through the mouth and throat. In Parkinson's disease, dysphagia (difficulty swallowing) can occur due to motor control issues, indicating the broader impact of neurodegeneration on vital functional abilities and necessitating therapeutic interventions.
34) Depression:
Depression is a mood disorder marked by persistent feelings of sadness and loss of interest. In Parkinson's disease, depression commonly accompanies motor symptoms, stemming from neurological changes, which complicates management and emphasizes the need for comprehensive treatment addressing both physical and psychological health.
35) Stiffness:
Stiffness refers to the rigidity of muscles and joints that limits movement. In Parkinson's disease, stiffness is a prominent motor symptom resulting from disrupted neuromuscular coordination, significantly impairing mobility and daily functioning, thereby impacting the patient’s overall quality of life.
36) Toxicity:
Toxicity defines the degree of harm a substance can cause to biological systems. In the context of Parkinson's disease, various toxins, including those derived from the environment or endogenous oxidative processes, contribute to neuronal damage and degeneration, exacerbating disease progression and complicating treatment.
37) Learning:
Learning refers to the acquisition of knowledge and skills through experience or education. In Parkinson’s disease, cognitive impairments can hinder the ability to learn, affecting rehabilitation and strategies for managing the disease, necessitating tailored educational approaches for affected individuals.
38) Entering:
Entering signifies the act of going into or becoming involved in a situation. In the context of Parkinson's research, entering various stages of degeneration and symptom manifestation illustrates the progressive nature of the disease and the importance of early diagnosis and intervention for optimal management.
39) Anxiety:
Anxiety is a psychological state characterized by excessive worry or fear. In Parkinson's disease, anxiety often coexists with motor symptoms, impacting overall well-being and requiring treatment considerations that address both psychological and motor aspects of the disease for holistic patient care.
40) Surface:
Surface pertains to the outermost layer of an object. In medical terms, surface markers on cells can influence immune responses. In Parkinson's disease, surface changes in dopamine receptors or neuronal membranes may impact communication within neuronal networks and disease progression.
41) Animal:
Animal, in scientific research, often refers to organisms used in studies to model human diseases. In Parkinson's disease research, animal models help investigate the disease's pathology, allowing for observation of neurological changes and testing of therapeutic interventions to inform human treatment.
42) Reason:
Reason refers to the cause or explanation for an occurrence. In the context of Parkinson's disease, identifying the underlying reasons for neurodegeneration, such as genetic, environmental, or lifestyle factors, is vital for understanding the disease and developing effective prevention and treatment strategies.
43) Vibhu:
Vibhu refers to one of the authors of the research article on Parkinson's disease. As part of the research team, contributions by Vibhu Bhardwaj help to broaden the investigation into different aspects of the disease, including potential mechanisms and biomarkers linked to neurodegeneration.
44) Gold (Golden):
Gold, in a metaphoric context, could refer to something precious or of high value. In scientific research, a 'gold standard' reflects the highest quality or benchmark used to evaluate diagnostics or interventions, signifying the pursuit of optimal methods in Parkinson's disease research and treatment.
45) Salt (Salty):
Salt in a biological context typically refers to ionic compounds affecting cellular processes. In Parkinson's research, understanding the role of different salts, such as sodium in neurotransmission or electrolytic balance, is important in studying the biochemical foundations relevant to neuronal health and dysfunction.
Other Science Concepts:
Discover the significance of concepts within the article: ‘Review of oxidative stress mechanisms in Parkinson's and biomarkers.’. Further sources in the context of Science might help you critically compare this page with similair documents:
Oxidative stress, Reactive oxygen species, Parkinson's disease, Neuroinflammation, Neurotransmitter, Protein aggregation, Clinical intervention, Glutathione, Lewy bodies, Coenzyme Q10, Brain derived neurotrophic factor, Mitochondrial dysfunction, Insulin-like growth factor, Excitotoxicity, Lymphocytic infiltration, Astrogliosis, 8-hydroxydeoxyguanosine, Dopaminergic neuron.