scholarly journals Analytical Strategies in Lipidomics for Discovery of Functional Biomarkers from Human Saliva

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Snezana Agatonovic-Kustrin ◽  
David William Morton ◽  
Valeriy Smirnov ◽  
Alexey Petukhov ◽  
Vladimir Gegechkori ◽  
...  

Human saliva is increasingly being used and validated as a biofluid for diagnosing, monitoring systemic disease status, and predicting disease progression. The discovery of biomarkers in saliva biofluid offers unique opportunities to bypass the invasive procedure of blood sampling by using oral fluids to evaluate the health condition of a patient. Saliva biofluid is clinically relevant since its components can be found in plasma. As salivary lipids are among the most essential cellular components of human saliva, there is great potential for their use as biomarkers. Lipid composition in cells and tissues change in response to physiological changes and normal tissues have a different lipid composition than tissues affected by diseases. Lipid imbalance is closely associated with a number of human lifestyle-related diseases, such as atherosclerosis, diabetes, metabolic syndromes, systemic cancers, neurodegenerative diseases, and infectious diseases. Thus, identification of lipidomic biomarkers or key lipids in different diseases can be used to diagnose diseases and disease state and evaluate response to treatments. However, further research is needed to determine if saliva can be used as a surrogate to serum lipid profiles, given that highly sensitive methods with low limits of detection are needed to discover salivary biomarkers in order to develop reliable diagnostic and disease monitoring salivary tests. Lipidomic methods have greatly advanced in recent years with a constant advance in mass spectrometry (MS) and development of MS detectors with high accuracy and high resolution that are able to determine the elemental composition of many lipids.

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e10814
Author(s):  
Mengya Wang ◽  
Jingjing Jing ◽  
Hao Li ◽  
Jingwei Liu ◽  
Yuan Yuan ◽  
...  

Background Autophagy is an evolutionally highly conserved process, accompanied by the dynamic changes of various molecules, which is necessary for the orderly degradation and recycling of cellular components. The aim of the study was to identify the role of autophagy-related (ATG) genes in the occurrence and development of gastric cancer (GC). Methods Data from Oncomine dataset was used for the differential expression analysis between cancer and normal tissues. The association of ATG genes expression with clinicopathologic indicators was evaluated by The Cancer Genome Atlas (TCGA) database and Gene Expression Omnibus (GEO) database. Moreover, using the TCGA datasets, the prognostic role of ATG genes was assessed. A nomogram was further built to assess the independent prognostic factors. Results The expression of autophagy-related genes AMBRA1, ATG4B, ATG7, ATG10, ATG12, ATG16L2, GABARAPL2, GABARAPL1, ULK4 and WIPI2 showed differences between cancer and normal tissues. After verification, ATG14 and ATG4D were significantly associated with TNM stage. ATG9A, ATG2A, and ATG4D were associated with T stage. VMP1 and ATG4A were low-expressed in patients without lymph node metastasis. No gene in autophagy pathway was associated with M stage. Further multivariate analysis suggested that ATG4D and MAP1LC3C were independent prognostic factors for GC. The C-index of nomogram was 0.676 and the 95% CI was 0.628 to 0.724. Conclusion Our study provided a comprehensive illustration of ATG genes expression characteristics in GC. Abnormal expressions of the ubiquitin-like conjugated system in ATG genes plays a key role in the occurrence of GC. ATG8/LC3 sub-system may play an important role in development and clinical outcome of GC. In the future, it is necessary to further elucidate the alterations of specific ATG8/LC3 forms in order to provide insights for the discovery, diagnosis, or targeting for GC.


Author(s):  
N. Sujatha ◽  
K. Lakshmi Kavitha ◽  
K.V. Subramanyam ◽  
T. Srinivasa Rao ◽  
R.N. Ramani Pushpa

Background: Pasteurella multocida is the causative agent of many economically important diseases in a wide range of hosts. The mechanisms by which these bacteria can invade the mucosa, evade innate immunity and cause systemic disease are slowly being elucidated. Many key virulence factors are yet to be identified, including those required for initial attachment and invasion of host cells and for persistence in a relatively nutrient poor and hostile environment. This has led to intensive research to understand host adaptation mechanisms and virulence factors in order to develop effective vaccines. Methods: The present study was carried out to know the distribution of virulence genes viz., haemoglobin binding proteins (hgbA and hgbB), outer membrane protein (ompH), fimbrial antigen (ptfA), filamentous haemagglutinin (pfhA) and transferrin binding protein (tbpA) by PCR in P. multocida CapA isolates from apparently healthy or carrier animals and CapB isolates from field Haemorrhagic septicemia (HS) cases to monitor the epidemiological associations of virulence genes in Cap A and Cap B isolates.Result: The study revealed that all the six virulence associated genes were present in Cap B isolates. None of the Cap A isolates harboured tbpA and pfhA genes. These two genes were closely related to serotype B causing Haemorrhagic septicemia and were epidemiologically associated with disease status.


2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Francesco D’Amico ◽  
Michele Finotti ◽  
Chiara Di Renzo ◽  
Alessio Pasquale ◽  
Alessandra Bertacco ◽  
...  

Pancreatic intraductal papillary-mucinous neoplasm is a rare primary neoplasm of unknown pathogenesis. This kind of tumor represents 0.2–2.7% of all pancreatic cancers and they may proceed to malignant lesions. In this study, we describe a case of pancreatic intraductal papillary-mucinous tumor (4.3 cm) with normal tumoral markers and nuclear atypia. We perform also a systematic review of the literature on MEDLINE and find only one relevant study that used microwave ablation for the palliative treatment of pancreatic tumor. We describe the case of a 70-year-old Caucasian male who was diagnosed with a pancreatic tumor with biliary tree dilatation. The patient underwent computed tomography (CT), percutaneous biopsy, and an endoscopic positioning of prosthesis in the biliary tree. Due to the worsening of jaundice and cholestasis, and considering the severe systemic disease status, palliative surgery with microwave thermoablation in the head of pancreas was performed. No complications were observed. The hospitalization lasted for 11 days after surgery, with normal liver and pancreatic lab tests at discharge. The patient followed a line of chemotherapy for 6 months with a complete response for 8 months. One month after the treatment, a staging CT scan was performed showing the size of the cephalopancreatic lesion had decreased from 43 to 35 mm with signs of complete ablation. The patient had a total response at the imaging of 10 months. One year later, a CT scan follow-up showed progression of the pancreatic disease. The disease remained stable for 18 months. The patient died due to cardiovascular complications with an overall survival of 30 months. Microwave ablation in our case report has been demonstrated to be feasible and safe without complications. It can be used as a phase of multimodality treatment in patients with severe systemic disease status and advanced intraductal papillary-mucinous neoplasm.


2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Rafiullah Khan ◽  
Arshad Ahmad ◽  
Alhuseen Omar Alsayed ◽  
Muhammad Binsawad ◽  
Muhammad Arshad Islam ◽  
...  

With the advancement in ICT, web search engines have become a preferred source to find health-related information published over the Internet. Google alone receives more than one billion health-related queries on a daily basis. However, in order to provide the results most relevant to the user, WSEs maintain the users’ profiles. These profiles may contain private and sensitive information such as the user’s health condition, disease status, and others. Health-related queries contain privacy-sensitive information that may infringe user’s privacy, as the identity of a user is exposed and may be misused by the WSE and third parties. This raises serious concerns since the identity of a user is exposed and may be misused by third parties. One well-known solution to preserve privacy involves issuing the queries via peer-to-peer private information retrieval protocol, such as useless user profile (UUP), thereby hiding the user’s identity from the WSE. This paper investigates the level of protection offered by UUP. For this purpose, we present QuPiD (query profile distance) attack: a machine learning-based attack that evaluates the effectiveness of UUP in privacy protection. QuPiD attack determines the distance between the user’s profile (web search history) and upcoming query using our proposed novel feature vector. The experiments were conducted using ten classification algorithms belonging to the tree-based, rule-based, lazy learner, metaheuristic, and Bayesian families for the sake of comparison. Furthermore, two subsets of an America Online dataset (noisy and clean datasets) were used for experimentation. The results show that the proposed QuPiD attack associates more than 70% queries to the correct user with a precision of over 72% for the clean dataset, while for the noisy dataset, the proposed QuPiD attack associates more than 40% queries to the correct user with 70% precision.


2021 ◽  
Vol 80 (Suppl 1) ◽  
pp. 229.1-230
Author(s):  
B. Sözeri ◽  
F. Demir ◽  
S. Kalin ◽  
C. Hasbal Akkuş

Background:Patients with rheumatic diseases are considered at risk for serious infections due to their immune-compromised-status set in their primary systemic disease and the usage of immune-modulating therapies. Although various results have been reported on the subject, it is still unknown whether patients with rheumatic disease, many of whom are on immune-suppression, are at higher risk of severe COVID-19.Objectives:We aim to share our clinical SARS-CoV-2 experience in patient with the childhood rheumatic disease during pandemic.Methods:We evaluated 4470 patients at our pediatric-rheumatology clinic during the pandemic, from 11-March to 15-October-2020. Demographic and clinical features, treatments, laboratory results, imaging findings, and clinical outcomes of patients diagnosed with COVID-19 and/or multisystem inflammatory syndrome (MIS-C) were review from the medical records. The data of all these patients were compared between groups and presented. A p-value <0.05 was considered statistically significant.Results:Among 4470 patients, 87 COVID-19 suspected patients were included in the study. Fifty six (64.4%) patients were hospitalized and 31 were followed without hospitalization. The most common rheumatic diseases among them were juvenile idiopathic arthritis and familial Mediterranean fever (35.6% and 34.5%). The primary disease status of these patients were; 78 (89.6%) were in remission, while 9 (10.3%) had active disease at the time of COVID-19 diagnosis. Twenty six of these patients were treated with biologic DMARDs. SARS-CoV-2 infection (RT-PCR and/or antibody test) was found positive in 84 patients (96.5%). Also, fifty one (58.6%) patients had an epidemiologic contact to a person with COVID-19. Fifty six of 87 (64.3%) had a fever and 20 (23%) had a fever for five or more days. Gastrointestinal system involvement was in 11 (12.6%), the respiratory system was in 40 (46%) and fatigue was in 57 (65.5%) patients. Cutaneous involvement was seen in 5 patients including maculopapular rash in two, vasculitic rash in two, and chilblain in one patient. 63.2% of patients had increased C-reactive protein (CRP), 40.2% had lymphocytopenia (<1500/mm3) and 26.4 % had elevated D-dimer level. SARS-CoV-2 infection was confirmed in 84 patients (96.5%). The diagnosis was confirmed by RT-PCR in 74 patients and by antibody test in 10. 18 patients met the clinical criteria and diagnosed with MIS-C. Nine of them had also hypotension and seven patients admitted the intensive care unit because of shock and severe end-organ illness. COVID-19 outbreak also caused exacerbation of systemic disease in 56 children due to a discontinue of medication, postponed drug switch, or viral infection triggered.Conclusion:In conclusion, children with rheumatic disease do not appear to present a higher risk of severe COVID-19. Whether these patients receive biological treatment does not affect the severity of the disease, but it is still not true to say that these drugs are protective. The immunosuppressive treatments can be adjusted in case of infection, otherwise it is not recommended interrupt the treatments. Physicians should be cautious about the hyperinflammatory syndrome associated with COVID-19 in rheumatic children, which may be severe in this group of patients and may be confused with primary diseases.References:[1]Wahezi DM, Lo MS, TB Rubinstein, Ringold S, Ardoin SP, Downes KJ, et al. American College of Rheumatology Guidance for the Management of Children with Pediatric Rheumatic Disease During the COVID-19 Pandemic: Version 1. Arth & Rheum 2020;doi:10.1002/art.41455.Disclosure of Interests:None declared.


Metabolites ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 670
Author(s):  
Jackeline Franco ◽  
Bartek Rajwa ◽  
Paulo Gomes ◽  
Harm HogenEsch

Lipids play a critical role in the skin as components of the epidermal barrier and as signaling and antimicrobial molecules. Atopic dermatitis in dogs is associated with changes in the lipid composition of the skin, but whether these precede or follow the onset of dermatitis is unclear. We applied rapid lipid-profiling mass spectrometry to skin and blood of 30 control and 30 atopic dogs. Marked differences in lipid profiles were observed between control, nonlesional, and lesional skin. The lipid composition of blood from control and atopic dogs was different, indicating systemic changes in lipid metabolism. Female and male dogs differed in the degree of changes in the skin and blood lipid profiles. Treatment with oclacitinib or lokivetmab ameliorated the skin condition and caused changes in skin and blood lipids. A set of lipid features of the skin was selected as a biomarker that classified samples as control or atopic dermatitis with 95% accuracy, whereas blood lipids discriminated between control and atopic dogs with 90% accuracy. These data suggest that canine atopic dermatitis is a systemic disease and support the use of rapid lipid profiling to identify novel biomarkers.


Author(s):  
Andreas Hagendorff

Systemic diseases are generally an interdisciplinary challenge in clinical practice. Systemic diseases are able to induce tissue damage in different organs with ongoing duration of the illness. The heart and the circulation are important targets in systemic diseases. The cardiac involvement in systemic diseases normally introduces a chronic process of alterations in cardiac tissue, which causes cardiac failure in the end stage of the diseases or causes dangerous and life-threatening problems by induced acute cardiac events, such as myocardial infarction due to coronary thrombosis. Thus, diagnostic methods—especially imaging techniques—are required, which can be used for screening as well as for the detection of early stages of the diseases. Two-dimensional echocardiography is the predominant diagnostic technique in cardiology for the detection of injuries in cardiac tissue—e.g. the myocardium, endocardium, and the pericardium—due to the overall availability of the non-invasive procedure.The quality of the echocardiography and the success rate of detecting cardiac pathologies in patients with primary non-cardiac problems depend on the competence and expertise of the investigator. Especially in this scenario clinical knowledge about the influence of the systemic disease on cardiac anatomy and physiology is essential for central diagnostic problem. Therefore the primary echocardiography in these patients should be performed by an experienced clinician or investigator. It is possible to detect changes of cardiac morphology and function at different stages of systemic diseases as well as complications of the systemic diseases by echocardiography.The different parts of this chapter will show proposals for qualified transthoracic echocardiography focusing on cardiac structures which are mainly involved in different systemic diseases.


2010 ◽  
Vol 10 ◽  
pp. 434-456 ◽  
Author(s):  
Sebastien J. C. Farnaud ◽  
Ourania Kosti ◽  
Stephen J. Getting ◽  
Derek Renshaw

Saliva has been described as the mirror of the body. In a world of soaring healthcare costs and an environment where rapid diagnosis may be critical to a positive patient outcome, saliva is emerging as a viable alternative to blood sampling. In this review, we discuss the composition and various physiological roles of saliva in the oral cavity, including soft tissue protection, antimicrobial activities, and oral tissue repair. We then explore saliva as a diagnostic marker of local oral disease and focus particularly on oral cancers. The cancer theme continues when we focus on systemic disease diagnosis from salivary biomarkers. Communicable disease is the focus of the next section where we review the literature relating to the direct and indirect detection of pathogenic infections from human saliva. Finally, we discuss hormones involved in appetite regulation and whether saliva is a viable alternative to blood in order to monitor hormones that are involved in satiety.


Cancers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 664 ◽  
Author(s):  
Noemi Eiro ◽  
Luis O. Gonzalez ◽  
María Fraile ◽  
Sandra Cid ◽  
Jose Schneider ◽  
...  

Although the mechanisms underlying the genesis and progression of breast cancer are better understood than ever, it is still the most frequent malignant tumor in women and one of the leading causes of cancer death. Therefore, we need to establish new approaches that lead us to better understand the prognosis of this heterogeneous systemic disease and to propose new therapeutic strategies. Cancer is not only a malignant transformation of the epithelial cells merely based on their autonomous or acquired proliferative capacity. Today, data support the concept of cancer as an ecosystem based on a cellular sociology, with diverse components and complex interactions between them. Among the different cell types that make up the stroma, which have a relevant role in the dynamics of tumor/stromal cell interactions, the main ones are cancer associated fibroblasts, endothelial cells, immune cells and mesenchymal stromal cells. Several factors expressed by the stroma of breast carcinomas are associated with the development of metastasis, such as matrix metalloproteases, their tissular inhibitors or some of their regulators like integrins, cytokines or toll-like receptors. Based on the expression of these factors, two types of breast cancer stroma can be proposed with significantly different influence on the prognosis of patients. In addition, there is evidence about the existence of bi-directional signals between cancer cells and tumor stroma cells with prognostic implications, suggesting new therapeutic strategies in breast cancer.


Sign in / Sign up

Export Citation Format

Share Document