Fasciitis
Fasciitis refers to the inflammation of a fascia, which is a band or sheet of connective tissue, primarily collagen, beneath the skin that attaches, stabilizes, encloses, and separates muscles and other internal organs. Among the various forms, plantar fasciitis is a particularly common condition, recognized as the leading cause of heel pain. It frequently affects individuals engaged in running and jumping sports, impacting their physical activity and overall quality of life. Plantar fascial disorders also encompass plantar fibromatosis, a less common condition characterized by the fibrous overgrowth of deep connective tissue in the foot. [1]
Biological Basis
Research indicates that genetic factors can influence an individual's susceptibility to plantar fascial disorders. A genome-wide association study identified specific genetic variants linked to these conditions. One such variant is an indel (insertion-deletion polymorphism) located on chromosome 5 (chr5:118704153:D) within the TNFAIP8 gene. This gene encodes a protein that is induced by tumor necrosis factor alpha (TNF-alpha), suggesting a potential role in inflammatory pathways. Another identified variant is the single nucleotide polymorphism (SNP) rs62051384, situated within the WWP2 gene, which is involved in proteasomal degradation processes. These genetic variations show a statistically significant association with plantar fascial disorders, providing insights into why certain individuals may have a higher predisposition to developing these conditions. [1]
Clinical and Social Importance
The prevalence of plantar fasciitis as a cause of heel pain underscores its significant clinical and social importance. It can lead to chronic discomfort, limit mobility, and hinder participation in sports and daily activities, thereby affecting individuals' well-being and productivity. For athletes, plantar fasciitis can be a career-limiting injury. Understanding the genetic underpinnings of fasciitis, particularly plantar fascial disorders, holds promise for developing more targeted prevention strategies, improved diagnostic tools, and personalized treatment approaches. Identifying individuals at higher genetic risk could allow for early intervention or lifestyle modifications, potentially reducing the incidence and severity of the condition within affected populations.
Methodological and Phenotyping Challenges
Research into complex conditions like fasciitis often faces inherent limitations stemming from data collection and phenotyping. Studies frequently rely on electronic medical record (EMR) data, which, while offering longitudinal insights, may originate from a single clinical center, potentially introducing cohort bias by limiting the diversity of patient populations. Furthermore, the EMRs might contain unrecorded comorbidities, which could lead to false-negative outcomes in both case and control groups, thereby affecting the accuracy of disease classification. The diagnostic process itself can be influenced by healthcare system practices, where diagnoses might be documented without full confirmation based on specific test orders, necessitating stringent criteria like requiring multiple diagnoses to minimize false-positive results in case group selection. [2]
A significant challenge in hospital-centric databases is the absence of "subhealthy" individuals, meaning nearly all participants have at least one documented diagnosis. This characteristic can bias control groups, as they may not represent a truly healthy population, potentially confounding genetic association studies. While some cohorts integrate detailed physician-documented EMRs to enhance data accuracy and disease classification, particularly for chronic conditions like fasciitis, other large biobanks often include self-reported information, which is susceptible to recall bias, especially for conditions with variable onset or long latency periods. [2]
Generalizability and Population-Specific Genetic Architectures
A critical limitation in understanding the genetic architecture of fasciitis, and complex diseases in general, is the historical underrepresentation of non-European populations in genome-wide association studies (GWAS). This imbalance hinders the identification of rare variants and limits the generalizability of findings, as individuals' genetic risk factors are predominantly influenced by their ancestry. Over-reliance on genetic data from a single ancestry for evaluating health and disease outcomes can exacerbate health disparities, particularly when clinical applications of genetic findings are primarily tailored to European populations. [2]
Consequently, there is a strong need to consider ancestry-specific genetic architectures when developing polygenic risk score (PRS) models for conditions like fasciitis. Significant discrepancies in effect sizes for specific genetic variants have been observed across different populations, underscoring the impact of population-specific genetic backgrounds on disease associations. Without diverse ancestral representation, the predictive power and clinical utility of genetic models for fasciitis may be limited to specific populations, restricting their broader applicability. [2]
Incomplete Understanding of Complex Disease Etiology
The etiology of fasciitis is complex, arising from a combination of genetic and environmental factors, rather than being driven by a single gene. Disease development typically involves the intricate interplay of multiple genes and various environmental influences. Current polygenic risk score (PRS) models, even when adjusted for basic confounders like age and sex, often achieve limited predictive power, with area under the curve (AUC) values frequently remaining below 0.7 for many traits, indicating a substantial portion of disease risk remains unexplained. [2]
The performance of these models can also be constrained by small sample sizes, which directly impacts their predictive accuracy. To achieve a more comprehensive understanding and improve model accuracy for fasciitis, it is crucial to integrate a wider array of clinical features and environmental factors. These include metrics such as body mass index, blood pressure, various biomarkers, and lifestyle elements like exercise, diet, alcohol consumption, and smoking, which are often not fully incorporated into current genetic models. The omission of these significant contributors represents a knowledge gap that limits the full elucidation of fasciitis susceptibility and progression. [2]
Variants
Genetic variants play a crucial role in modulating biological pathways that can contribute to the development and progression of fasciitis, a condition characterized by inflammation and fibrosis of the fascia. Single nucleotide polymorphisms (SNPs) and other genetic variations can alter gene expression, protein function, or regulatory mechanisms, influencing cellular processes fundamental to tissue repair, inflammation, and extracellular matrix remodeling. Understanding these variants and their associated genes provides insight into the underlying genetic susceptibility for such conditions. [3]
The Wnt signaling pathway, critical for cell development and tissue homeostasis, is implicated in fibrotic conditions like frozen shoulder, a form of fasciitis. The variant rs28971325 is a genome-wide significant locus associated with frozen shoulder, with the nearby gene WNT7B identified as a potential causal gene. WNT7B (Wnt Family Member 7B) encodes a signaling protein that promotes cell proliferation and differentiation, and its expression was found to be significantly elevated in the anterior capsule tissue of patients undergoing arthroscopic capsulotomy for frozen shoulder, suggesting its involvement in the fibrotic process. [3] Similarly, SFRP4 (Secreted Frizzled Related Protein 4), which acts as an antagonist of the Wnt pathway by inhibiting Wnt ligand binding, is also considered a potential causal gene for frozen shoulder. While the specific impact of rs6965376 on SFRP4 activity or expression is not detailed, variants affecting SFRP4 could modulate Wnt signaling, thereby influencing the fibrotic response and contributing to the excessive collagen deposition characteristic of fasciitis. [3]
Transcriptional regulation and the influence of non-coding RNAs are also significant in tissue pathology. The ELL (Elongation Factor Like) gene encodes a protein that functions as an RNA polymerase II elongation factor, playing a direct role in controlling the rate of gene transcription. A variant such as rs78030362 in ELL could potentially alter its transcriptional regulatory activity, thereby affecting the expression of genes involved in inflammation, fibroblast activation, or extracellular matrix synthesis—processes central to fasciitis. Concurrently, LINC01592 (Long Intergenic Non-Coding RNA 01592) represents a class of regulatory RNA molecules known as lncRNAs, which can influence gene expression through various mechanisms, including chromatin remodeling and transcriptional interference. [4] The variant rs659430 within LINC01592 might alter its structure or function, leading to dysregulated expression of target genes that are critical for maintaining tissue integrity or mediating the fibrotic response in fasciitis. [5]
Further contributing to the complex genetic landscape of fasciitis are variants affecting other regulatory elements and transcription factors. The region involving LINC01748 and NFIA (Nuclear Factor I A), with the associated variant rs200886086, highlights the interplay between lncRNAs and protein-coding genes. NFIA is a transcription factor important for cell differentiation and tissue development, and its activity can modulate gene networks involved in cellular growth and repair. Alterations in NFIA function, possibly influenced by rs200886086, could disrupt normal tissue remodeling and contribute to the pathological fibrotic changes seen in fasciitis. [6] Similarly, LINC01748, as a long non-coding RNA, may exert its regulatory effects on nearby genes, including NFIA, or on distant genes involved in inflammatory and fibrotic pathways. A variant like rs200886086 could potentially modify LINC01748's regulatory capacity, thereby indirectly affecting the cellular environment and predisposing individuals to fasciitis. [7]
Key Variants
| RS ID | Gene | Related Traits |
|---|---|---|
| rs28971325 | WNT7B | frozen shoulder body height Dupuytren Contracture contracture fasciitis |
| rs6965376 | SFRP4 | fasciitis |
| rs78030362 | ELL | Dupuytren Contracture neutrophil gelatinase-associated lipocalin measurement erythrocyte count serum creatinine amount coronary artery disease |
| rs659430 | LINC01592 | Dupuytren Contracture fasciitis |
| rs200886086 | LINC01748 - NFIA | fasciitis |
Definition and Core Characteristics
"Fasciitis" generally refers to inflammation of the fascia, a type of connective tissue. More specifically, "plantar fasciitis" is a precise term used to describe a condition that is a principal component of "plantar fascial disorder," a broader category that also includes plantar fibromatosis. This condition is widely recognized as the most common cause of heel pain, particularly affecting athletes involved in high-impact activities like running and jumping. Clinically, plantar fasciitis is characterized by pain and stiffness in the heel and arch of the foot, often most pronounced with the first steps after rest.
The conceptual framework for understanding fasciitis has evolved beyond a purely inflammatory model, despite the "-itis" suffix. While inflammation can be present, a significant degenerative component is often recognized, leading some to consider terms like "fasciosis" or "fasciopathy" to better reflect the underlying pathology, which may involve collagen degeneration rather than acute inflammation. This acknowledges that the condition results from a complex interplay of mechanical stress, microtrauma, and tissue repair responses. The recognition of "plantar fascial disorders" as a collective term highlights the spectrum of pathologies affecting the plantar fascia, from pain and degeneration to the rarer fibrous hyperproliferation seen in plantar fibromatosis, a condition involving abnormal growth of deep connective tissue in the foot.
Classification and Nomenclature
Fasciitis and related conditions are systematically categorized using established classification systems to ensure consistency in diagnosis, treatment, and epidemiological studies. The International Classification of Diseases (ICD), specifically its Ninth (ICD-9-CM) and Tenth (ICD-10-CM) Revisions, provides comprehensive diagnostic codes used in electronic medical records (EMRs) for archiving and converting disease data. This standardized nomenclature enables healthcare providers and researchers to classify diseases uniformly across different clinical settings. For large-scale research initiatives, such as genetic studies, conditions like plantar fascial disorders are often identified using more granular systems like PheCode criteria, which allow for the precise identification of cases based on aggregated diagnostic codes from patient records.
The nomenclature surrounding fascial conditions recognizes specific anatomical locations, such as "plantar fasciitis" for the foot, differentiating it from similar conditions elsewhere in the body. The broader classification of "plantar fascial disorders" serves as an umbrella term, encompassing both plantar fasciitis and plantar fibromatosis. While both involve the plantar fascia, plantar fibromatosis is distinct due to its characteristic fibrous hyperproliferation of the deep connective tissue, distinguishing it from the primarily pain and degenerative changes associated with plantar fasciitis. This categorical approach to classification helps in understanding the distinct pathological processes and guides appropriate clinical management and research stratification.
Diagnostic and Research Criteria
The diagnostic criteria for fasciitis, especially plantar fasciitis, in clinical practice are primarily based on a thorough patient history and physical examination. Key indicators include localized heel pain that is typically worse in the morning or after periods of inactivity, and tenderness upon palpation of the plantar fascia insertion at the heel. For research studies, particularly those investigating genetic associations, a more rigorous and operational definition of "plantar fascial disorders" is essential to ensure the validity and reproducibility of findings. These research criteria often involve the application of PheCode criteria, where a diagnosis is established based on its presence in electronic medical records on at least three distinct occasions, thereby minimizing misclassification. Control groups in such studies are similarly defined as individuals who do not meet these specific PheCode criteria for the disease.
Measurement approaches in fasciitis research extend to identifying underlying biological predispositions, such as genetic variants. Genome-wide association screens are employed to pinpoint genetic loci associated with plantar fascial disorders, utilizing large cohorts of cases and controls. While clinical diagnoses contribute to defining these case populations, the research context often seeks to identify objective biomarkers. For instance, specific genetic variants, such as an indel (chr5:118704153:D) located within the TNFAIP8 gene or a single nucleotide polymorphism (rs62051384) within the WWP2 gene, have been identified as being associated with an individual's risk for plantar fascial disorders. These genetic markers, while not direct diagnostic tools, represent a measurement approach to understand susceptibility and potentially refine risk stratification beyond traditional clinical assessments.
Clinical Manifestations and Presentation Patterns
Plantar fasciitis is prominently identified by heel pain, establishing itself as the most prevalent cause of this symptom, particularly among athletes engaged in running and jumping activities . The TNFAIP8 gene encodes a protein induced by TNF alpha, while WWP2 is involved in proteasomal degradation, suggesting roles for immune response and protein turnover in fascial health. [1] Although these variants may have small individual effects, they are informative in explaining why certain individuals exhibit a higher risk for developing these conditions, pointing towards a polygenic architecture where multiple genetic factors collectively influence susceptibility. [1]
Environmental and Lifestyle Influences
Environmental factors and lifestyle choices play a crucial role in the development and manifestation of fasciitis. Plantar fasciitis, for instance, is frequently observed in athletes involved in running and jumping sports, indicating that repetitive mechanical stress and overuse are significant environmental triggers. [1] Beyond specific physical activities, broader lifestyle elements such as diet, general exercise habits, alcohol consumption, and smoking can also contribute to overall disease risk and influence the accuracy of predictive models for polygenic diseases. [2] These factors can modulate physiological processes, affecting tissue integrity, inflammatory responses, and the body's capacity for repair, thereby influencing the likelihood of fascial inflammation and degeneration.
Gene-Environment Interaction and Related Conditions
The development of fasciitis often arises from a complex interplay between an individual's genetic makeup and their environmental exposures. Genetic predispositions, such as the identified variants in TNFAIP8 and WWP2, may increase an individual's vulnerability, making them more susceptible to developing fasciitis when exposed to environmental stressors like high-impact athletic activities. [1] This interaction suggests that while environmental factors can trigger the condition, genetic background dictates who is more likely to be affected or the severity of their response. Furthermore, plantar fascial disorder is understood to encompass both plantar fasciitis and plantar fibromatosis, indicating that these conditions may share common underlying genetic or environmental pathways or represent different manifestations within a spectrum of fascial pathology. [1]
Age and Sex-Related Factors
Age is a prominent non-genetic factor influencing the incidence of fasciitis, with research generally indicating that the occurrence of most diseases increases with age. [2] Incorporating age into disease models significantly improves their accuracy, suggesting that age-related physiological changes contribute to an elevated risk of developing various conditions, including fascial disorders. [2] Similarly, sex can also influence disease patterns and prevalence, acting as a biological factor that may modulate an individual's susceptibility or the clinical presentation of fasciitis. [2] These demographic factors highlight the importance of considering an individual's biological timeline and inherent sex differences when assessing risk for fascial inflammation.
Tissue-Level Pathology of Fasciitis
Fasciitis refers to the inflammation of a fascia, which is a band or sheet of connective tissue, primarily collagen, beneath the skin that attaches, stabilizes, encloses, and separates muscles and other internal organs. Plantar fascial disorder specifically encompasses conditions like plantar fasciitis and plantar fibromatosis, affecting the plantar fascia located on the sole of the foot. [1] Plantar fasciitis is widely recognized as the most frequent cause of heel pain, particularly prevalent among athletes participating in running and jumping activities. [1] In contrast, plantar fibromatosis is characterized by a rare, abnormal proliferation of fibrous tissue within the deep connective tissue of the foot. [1] These conditions represent disruptions in the normal homeostatic processes of connective tissue, leading to pain and structural alterations at the tissue level.
Genetic Underpinnings of Fascial Disorders
Genetic mechanisms play a role in predisposing individuals to plantar fascial disorders, suggesting that inherited factors influence susceptibility. A large-scale genome-wide association screen identified specific genetic loci associated with an increased risk for these conditions. [1] This research, involving a substantial cohort of cases and controls, revealed two significant DNA variants: an indel (chr5:118704153:D) and a single nucleotide polymorphism (rs62051384). [1] Although these variants have small effect sizes, they contribute to the genetic architecture explaining why some individuals are at a higher risk for developing plantar fascial disorders. [1]
Molecular Pathways and Cellular Functions
The identified genetic variants are located within genes that encode critical biomolecules involved in fundamental cellular processes. The indel chr5:118704153:D is situated within the TNFAIP8 gene, which codes for a protein induced by tumor necrosis factor alpha (TNF alpha). [1] TNF alpha is a potent inflammatory cytokine, and its induced proteins often play roles in regulating immune responses, cell survival, and inflammation, suggesting a link to inflammatory pathways in fasciitis. [1] The SNP rs62051384 is found within the WWP2 gene, which is known to be involved in proteasomal degradation. [1] WWP2 encodes an E3 ubiquitin ligase, a type of enzyme that tags proteins with ubiquitin for breakdown by the proteasome, a crucial process for protein quality control and cellular signaling. [1]
Mechanisms of Disease Development
Disruptions in the molecular and cellular pathways governed by TNFAIP8 and WWP2 can contribute to the pathophysiological processes underlying plantar fascial disorders. Altered function of TNFAIP8 could modulate the inflammatory response in the plantar fascia, potentially exacerbating or prolonging the inflammation characteristic of plantar fasciitis. [1] Similarly, compromised proteasomal degradation due to variants in WWP2 might lead to the accumulation of misfolded or improperly regulated proteins, affecting cellular homeostasis and the integrity of connective tissue. [1] These molecular disruptions could collectively contribute to the degenerative changes, inflammation, and abnormal fibrous tissue proliferation observed in plantar fascial disorders, highlighting the complex interplay between genetic predisposition and cellular dysfunction in disease pathogenesis.
Inflammatory Signaling and Cellular Response
The development of plantar fascial disorders, which include fasciitis, involves complex cellular signaling pathways, particularly those related to inflammation. A genetic variant, specifically an indel (chr5:118704153:D) located within the TNFAIP8 gene, has been associated with an increased risk for these disorders. [1] TNFAIP8 encodes a protein that is induced by Tumor Necrosis Factor alpha (TNF alpha), a potent pro-inflammatory cytokine. [1] This suggests that dysregulation in TNF alpha-mediated signaling cascades, involving receptor activation and downstream intracellular pathways, may contribute to the chronic inflammatory state observed in plantar fascial disorders, and by extension, in fasciitis, potentially by altering cellular responses to stress and injury. [1] The variant's presence implies a potential modulation of this inflammatory pathway, influencing the body's response to fascial microtrauma and subsequent healing processes in these conditions. [1]
Protein Homeostasis and Degradation Pathways
Maintaining cellular and tissue integrity in conditions like plantar fascial disorders, including fasciitis, relies heavily on robust protein homeostasis, a process regulated by intricate degradation pathways. A single nucleotide polymorphism (SNP) rs62051384 found within the WWP2 gene has been linked to plantar fascial disorders. [1] The WWP2 gene plays a critical role in proteasomal degradation, a major pathway for the controlled breakdown of ubiquitinated proteins. [1] This mechanism is essential for clearing damaged or misfolded proteins, regulating protein abundance, and influencing various cellular processes through post-translational modification and turnover. [1] Alterations in WWP2 function due to this genetic variant could impair the efficient removal of proteins, leading to accumulation of abnormal cellular components or altered signaling that compromises fascial tissue health and repair in these disorders. [1]
Genetic Predisposition and Risk Stratification
Genetic studies have begun to elucidate inherited susceptibilities to plantar fascial disorders, which encompass conditions such as plantar fasciitis and plantar fibromatosis. A genome-wide association screen identified two genetic variants, an indel (chr5:118704153:D) and a single nucleotide polymorphism (rs62051384), that are significantly associated with an altered risk for these conditions. [1] These findings suggest that individuals carrying specific alleles of these variants may have an inherently higher predisposition to developing plantar fascial disorders, offering a basis for early risk assessment. Identifying such individuals through genetic screening could enable personalized preventative strategies, particularly for populations known to be at increased risk, such as athletes involved in running and jumping sports. [1] While the individual effects of these specific variants are modest, their identification contributes to a more comprehensive understanding of the genetic architecture underlying susceptibility, moving towards a personalized medicine approach for prevention.
Molecular Mechanisms and Disease Pathogenesis
The identified genetic variants provide insights into the molecular pathways potentially involved in the development of plantar fascial disorders. The indel chr5:118704153:D is located within the TNFAIP8 gene, which encodes a protein induced by Tumor Necrosis Factor alpha (TNF-alpha), a critical mediator of inflammatory responses. [1] Concurrently, rs62051384 is found within WWP2, a gene implicated in proteasomal degradation, a process vital for cellular protein turnover and quality control. [1] These genetic associations suggest that dysregulation in inflammatory pathways or protein degradation mechanisms may contribute to the pathology of plantar fascial disorders. Understanding these underlying molecular mechanisms could pave the way for the identification of novel therapeutic targets or interventions tailored to specific biological pathways, thereby improving treatment selection and efficacy.
Clinical Utility and Prognostic Considerations
The identification of genetic markers for plantar fascial disorders holds promise for enhancing clinical utility, particularly in risk assessment and potentially in guiding prognostic considerations. While these variants currently provide a modest predictive effect for disease susceptibility, their presence can inform clinicians about an individual's inherent risk, guiding discussions on lifestyle modifications or early intervention strategies. [1] Further research is necessary to determine if these genetic insights can predict the severity, progression, or differential response to specific treatments for plantar fasciitis. Ultimately, integrating genetic risk information with traditional clinical features and environmental factors could lead to more nuanced prognostic evaluations and long-term management plans, optimizing patient care.
Frequently Asked Questions About Fasciitis
These questions address the most important and specific aspects of fasciitis based on current genetic research.
1. My mom has chronic heel pain. Will I get it too?
Yes, there's a chance. Genetic factors can make you more susceptible to plantar fascial disorders, and these traits can run in families. For instance, specific genetic variants in the TNFAIP8 gene, which is involved in inflammatory pathways, have been linked to these conditions. While genetics play a role, it doesn't mean you'll definitely develop it, as environmental factors are also important.
2. My friend also runs, but only I get heel pain. Why?
It could be due to your unique genetic makeup. Even if you share similar activities like running, individual genetic variations can influence your susceptibility to conditions like plantar fasciitis. For example, specific changes in the WWP2 gene, which manages cellular processes, can increase your predisposition, explaining why some are affected more than others.
3. Could a genetic test tell me if I'm at risk for foot pain?
Potentially, yes. Identifying genetic variants linked to plantar fascial disorders could help assess your individual risk. Knowing your genetic predisposition might allow for early intervention or lifestyle modifications, potentially reducing the severity of the condition before it develops. However, these tests are still evolving, and genetics are only part of the picture.
4. If heel pain runs in my family, can I still prevent it?
Yes, absolutely. While genetic predisposition increases your risk, lifestyle choices and environmental factors play a significant role. Understanding your family history can prompt you to take proactive steps, such as maintaining a healthy weight, wearing supportive footwear, and adopting appropriate exercise routines, which can help mitigate your genetic risk.
5. Does my family's ancestry affect my risk for foot problems?
Yes, your ancestry can influence your genetic risk. Research on complex diseases often finds that genetic risk factors can vary across different populations. Studies have shown that genetic models need to consider ancestry-specific genetic architectures to accurately predict risk, meaning your ethnic background might have unique predispositions.
6. Why is it sometimes hard for doctors to figure out my heel pain?
Heel pain, like fasciitis, has a complex etiology influenced by many factors, not just a single cause. It involves an intricate interplay of multiple genes and various environmental influences, which can make diagnosis challenging. Sometimes, medical records might also miss other health conditions that contribute to your symptoms, further complicating a clear diagnosis.
7. Does being overweight make me more likely to get plantar fasciitis?
Yes, it can. While genetics are a factor, environmental elements like body mass index (BMI) are significant contributors to conditions like fasciitis. Being overweight adds extra stress to your feet, and integrating this and other clinical features into a comprehensive risk assessment provides a more complete picture of your susceptibility and progression.
8. Do things like my diet or stress impact my foot pain risk?
Yes, they likely do. The development of fasciitis is not solely genetic; it also involves various environmental and lifestyle factors. While current genetic models don't always fully incorporate them, elements like your diet, exercise habits, alcohol consumption, and even stress can influence your overall susceptibility and the severity of the condition.
9. If I get heel pain, will it always be a problem for me?
Not necessarily, but it can lead to chronic discomfort if not managed. Plantar fasciitis can limit your mobility and daily activities, impacting your well-being over time. However, understanding the genetic and environmental factors contributing to your condition can lead to personalized treatment approaches and strategies to manage and reduce its long-term impact.
10. Could knowing my genetics help doctors treat my heel pain better?
Yes, it holds significant promise. Understanding your specific genetic predispositions could lead to more targeted prevention strategies and personalized treatment approaches. Identifying individuals at higher genetic risk allows for earlier intervention or tailoring therapies that are most likely to be effective for your unique genetic profile.
This FAQ was automatically generated based on current genetic research and may be updated as new information becomes available.
Disclaimer: This information is for educational purposes only and should not be used as a substitute for professional medical advice. Always consult with a healthcare provider for personalized medical guidance.
References
[1] Kim SK, Ioannidis JPA, Ahmed MA, et al. "Two Genetic Variants Associated with Plantar Fascial Disorders." Int J Sports Med, vol. 39, no. 4, Apr. 2018, pp. 314-321.
[2] Liu TY, Chen HY, Lin CW, et al. "Diversity and longitudinal records: Genetic architecture of disease associations and polygenic risk in the Taiwanese Han population." Sci Adv, vol. 11, eadt0539, 4 June 2025.
[3] Green, HD et al. A genome-wide association study identifies 5 loci associated with frozen shoulder and implicates diabetes as a causal risk factor. PLoS Genet. PMID: 34111113.
[4] Kasai, M et al. GWAS identifies candidate susceptibility loci and microRNA biomarkers for acute encephalopathy with biphasic seizures and late reduced diffusion. Sci Rep. PMID: 35079012.
[5] Bjornsdottir, G et al. Rare SLC13A1 variants associate with intervertebral disc disorder highlighting role of sulfate in disc pathology. Nat Commun. PMID: 35110524.
[6] Fritsche, LG et al. Seven new loci associated with age-related macular degeneration. Nat Genet. PMID: 23455636.
[7] Kim, SK et al. Two genetic loci associated with ankle injury. PLoS One. PMID: 28957384.