scholarly journals Characterization of a Temporal Profile of Biomarkers as an Index for Ischemic Stroke Onset Definition

2021 ◽  
Vol 10 (14) ◽  
pp. 3136
Author(s):  
Andrés Da Silva-Candal ◽  
Antonio Dopico-López ◽  
Maria Pérez-Mato ◽  
Manuel Rodríguez-Yáñez ◽  
José M. Pumar ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Molecular Mechanisms ◽  
Serum Levels ◽  
Serum Markers ◽  
Stroke Onset ◽  
Clinical Aspects ◽  
Latency Time ◽  
Non Invasive ◽  
Serum Glutamate

Background and purpose: Stroke is a dynamic process in terms of molecular mechanisms, with prominent glutamate-mediated excitotoxicity at the onset of symptoms followed by IL-6-mediated inflammation. Our aim was to study a serum glutamate/IL-6 ratio as an index for stroke onset definition. Methods: A total of 4408 ischemic stroke patients were recruited and then subdivided into four quartiles according to latency time in minutes (0–121, 121–185, 185–277 and >277). Latency time is defined as the time between stroke onset and treatment at the neurological unit. The primary endpoint of the study was the association of early latency times with different clinical aspects and serum markers. Serum glutamate and interleukin-6 (IL-6) levels at admission were selected as the main markers for excitotoxicity and inflammation, respectively. Results: Glutamate serum levels were significantly higher in the earlier latency time compared with the higher latency times (p < 0.0001). IL-6 levels were lower in early latency times (p < 0.0001). Patients with a glutamate/IL-6 index on admission of >5 were associated with a latency time of <121 min from the onset of symptoms with a sensitivity of 88% and a specificity of 80%. Conclusions: The glutamate/IL-6 index allows the development of a ratio for an easy, non-invasive early identification of the onset of ischemic stroke symptoms, thus offering a new tool for selecting early stroke patient candidates for reperfusion therapies.

scholarly journals Interleukin-10 may protect against progressing injury during the acute phase of ischemic stroke

2013 ◽  
Vol 71 (11) ◽  
pp. 846-851 ◽  
Author(s):  
Gustavo G. Protti ◽  
Rubens J. Gagliardi ◽  
Wilma C. N. Forte ◽  
Sandra Regina S. Sprovieri
Keyword(s):  
Ischemic Stroke ◽  
Acute Phase ◽  
Healthy Subjects ◽  
Ischemic Injury ◽  
Serum Levels ◽  
Neurological Impairment ◽  
Interleukin 10 ◽  
Stroke Onset ◽  
Stroke Severity ◽  
The Relationship

Atherosclerosis is an inflammatory disease, and ischemic stroke is one of its most common and devastating manifestations. Proinflammatory cytokines play a key role in the progression of the irreversible ischemic lesions. The presence of anti-inflammatory mediators may prevent secondary ischemic injury. Objectives 1) To assess the relationship between stroke severity and the serum levels of IL-1β, IL-2, and IL-10; and 2) To analyze the neurological outcome after 72 h of ischemic stroke onset and expression of interleukins. Method We measured the serum levels of IL-1β, IL-2, and IL-10 in 26 patients with acute stroke. Neurological impairment was scored using the National Institute of Health Stroke Scale within the first 72 h after stroke onset. Thirty healthy subjects were analyzed as controls. Results Patients with IL-10 <925.0 pg/mL presented with neurological deterioration within the first 72 h. Conclusion IL-10 may protect against ischemic injury during the acute phase of stroke.

scholarly journals Detection of serum soluble markers of immune activation in rheumatoid arthritis

1996 ◽  
Vol 5 (4) ◽  
pp. 262-265 ◽  
Author(s):  
T. Kogure ◽  
T. Itoh ◽  
Y. Shimada ◽  
T. Shintani ◽  
H. Ochiai ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
T Cell Activation ◽  
Immune Activation ◽  
Cell Activation ◽  
Serum Levels ◽  
Serum Markers ◽  
Clinical Aspects ◽  
Mutual Correlation ◽  
One Year ◽  
High Level

The mutual correlation among soluble CD4 (sCD4), soluble CD8 (sCD8), and soluble CD23 (sCD23) has not yet been studied in patients with rheumatoid arthritis (RA), although previous studies have demonstrated that certain soluble markers of immune activation are elevated in RA. Thus, we examined this correlation based on the serum levels of sCD4, sCD8 and sCD23, and that of their levels with other serum markers such as immunoglobulin (Ig) subtypes (IgG, IgM and IgA), IgM-rheumatoid factor (IgM-RF) and C-reactive protein (CRP) in 25 RA patients, sCD4 was not elevated, whereas both sCD8 and sCD23 increased in RA patients compared with the healthy controls; a majority of RA patients, in particular, showed a high sCD23 level. The level of sCD23 showed a correlation with that of IgM-RF, but not with those of IgG, IgM, IgA and CRP. Importantly, a high level of sCD23 was not always accompartied with that of sCD8. The independent change between sCD23 and sCD8 levels was also observed in a one-year follow-up study of the two RA patients. These findings indicate that B cells might be generally activated in RA, whereas T-cell activation in variable in each patient with RA, suggesting that sCD23 is a more indicative marker for the immune status of RA patients than sCD8 from the clinical aspects.

scholarly journals Association Between Spesific Enolase Serum Levels And Outcome Acute Ischemic Stroke onset 1-month

2019 ◽  
Vol 25 (2) ◽  
pp. 135
Author(s):  
Yuri Haiga ◽  
Darwin Amir ◽  
Yuliarni Syafrita
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Serum Levels ◽  
Cross Sectional Study ◽  
Stroke Onset ◽  
P Value ◽  
Sectional Study ◽  
Cross Sectional

Pendahuluan: Stroke adalah masalah kesehatan global, karena penyebab kematian kedua dan kecacatan utama pada hampir seluruh negara di dunia. Penyakit ini memiliki dampak yang besar terhadap penderita, lingkungan sosial dan beban ekonomi. Sehingga diperlukan penanda spesifik yang berperan dalam menegakkan diagnosis, penentuan faktor risiko, serta tingkat keparahan stroke iskemik. Salah satu penanda yang diteliti adalah kadar NSE serum, yang diperkirakan dapat menggambarkan beratnya kerusakan otak pada pasien stroke.Metode: Penelitian ini menggunakan metode Cross sectional study pada 77 pasien stroke iskemik , dilaksanakan mulai Juli 2016 sampai Agustus 2017, di ruang rawat inap di Bagian Penyakit Saraf RS. DR. M. Djamil Padang. Setiap pasien dilakukan pemeriksaan kadar NSE serum dan  penilaian skor mRS pada bulan-1 setelah onset stroke iskemik. Dan dilakukan uji Spearmen untuk menilai korelasi antara dua variabel. Nilai p <0.05 dianggap signifikan secara statistikHasil: Berdasarkan jenis kelamin didapatkan laki-laki 42 orang (54.54%).  Median  usia 58.21 (16-88). Median kadar NSE  5.94 ( 2.77-36.75) µg/L. Skor  mRS onset bulan-1 dengan  median 3 (1-6). Terdapat hubungan antara kadar serum NSE dengan fungsi luaran stroke iskemik onset bulan-1 (r = 0.286, p value= 0.012, R2= +8.2%)Diskusi: Terdapat hubungan antara kadar serum NSE dengan fungsi luaran stroke iskemik onset bulan-1.Kesimpulan: Terdapat hubungan antara kadar serum NSE dengan fungsi luaran stroke iskemik onset bulan-1.

Molecular Basis and Clinical Aspects of Hereditary Megakaryocyte and Platelet Membrane Glycoprotein Disorders

1996 ◽  
Vol 16 (02) ◽  
pp. 114-138 ◽  
Author(s):  
R. E. Scharf
Keyword(s):  
Genetic Basis ◽  
Molecular Mechanisms ◽  
Molecular Genetic ◽  
Platelet Membrane ◽  
Clinical Aspects ◽  
Membrane Glycoprotein ◽  
Membrane Glycoproteins ◽  
Membrane Expression ◽  
Receptor Complexes ◽  
Platelet Membrane Glycoprotein

SummarySpecific membrane glycoproteins (GP) expressed by the megakaryocyte-platelet system, including GPIa-lla, GPIb-V-IX, GPIIb-llla, and GPIV are involved in mediat-ing platelet adhesion to the subendothelial matrix. Among these glycoproteins, GPIIb-llla plays a pivotal role since platelet aggregation is exclusively mediated by this receptor and its interaction with soluble macromolecular proteins. Inherited defects of the GPIIb-llla or GPIb-V-IX receptor complexes are associated with bleeding disorders, known as Glanzmann's thrombasthenia, Bernard-Soulier syndrome, or platelet-type von Willebrand's disease, respectively. Using immuno-chemical and molecular biology techniques, rapid advances in our understanding of the molecular genetic basis of these disorders have been made during the last few years. Moreover, analyses of patients with congenital platelet membrane glycoprotein abnormalities have provided valuable insights into molecular mechanisms that are required for structural and functional integrity, normal biosynthesis of the glycoprotein complexes and coordinated membrane expression of their constituents. The present article reviews the current state of knowledge of the major membrane glycoproteins in health and disease. The spectrum of clinical bleeding manifestations and established diagnostic criteria for each of these dis-orders are summarized. In particular, the variety of molecular defects that have been identified so far and their genetic basis will be discussed.

Characterization of Ischemic Stroke in CT Images using Image Processing

2017 ◽  
Vol 7 (9) ◽  
pp. 18
Author(s):  
Amal Alzain ◽  
Suhaib Alameen ◽  
Rani Elmaki ◽  
Mohamed E. M. Gar-Elnabi
Keyword(s):  
Ischemic Stroke ◽  
White Matter ◽  
Classification Accuracy ◽  
Ct Images ◽  
Gray Level ◽  
Level Variation ◽  
Interactive Data ◽  
The Brain ◽  
Brain Tissues

This study concern to characterize the brain tissues to ischemic stroke, gray matter, white matter and CSF using texture analysisto extract classification features from CT images. The First Order Statistic techniques included sevenfeatures. To find the gray level variation in CT images it complements the FOS features extracted from CT images withgray level in pixels and estimate the variation of thesubpatterns. analyzing the image with Interactive Data Language IDL software to measure the grey level of images. The results show that the Gray Level variation and   features give classification accuracy of ischemic stroke 97.6%, gray matter95.2%, white matter 97.3% and the CSF classification accuracy 98.0%. The overall classification accuracy of brain tissues 97.0%.These relationships are stored in a Texture Dictionary that can be later used to automatically annotate new CT images with the appropriate brain tissues names.

scholarly journals A global non-invasive methodology for the phenotyping of potato under water deficit conditions using imaging, physiological and molecular tools

Plant Methods ◽  
2021 ◽  
Vol 17 (1) ◽  
Author(s):  
M. Musse ◽  
G. Hajjar ◽  
N. Ali ◽  
B. Billiot ◽  
G. Joly ◽  
...  
Keyword(s):  
Water Stress ◽  
Water Deficit ◽  
Soil Conditions ◽  
Growth Stages ◽  
Dry Matter Content ◽  
Tuber Growth ◽  
Non Invasive ◽  
Potato Plants ◽  
Significant Difference

Abstract Background Drought is a major consequence of global heating that has negative impacts on agriculture. Potato is a drought-sensitive crop; tuber growth and dry matter content may both be impacted. Moreover, water deficit can induce physiological disorders such as glassy tubers and internal rust spots. The response of potato plants to drought is complex and can be affected by cultivar type, climatic and soil conditions, and the point at which water stress occurs during growth. The characterization of adaptive responses in plants presents a major phenotyping challenge. There is therefore a demand for the development of non-invasive analytical techniques to improve phenotyping. Results This project aimed to take advantage of innovative approaches in MRI, phenotyping and molecular biology to evaluate the effects of water stress on potato plants during growth. Plants were cultivated in pots under different water conditions. A control group of plants were cultivated under optimal water uptake conditions. Other groups were cultivated under mild and severe water deficiency conditions (40 and 20% of field capacity, respectively) applied at different tuber growth phases (initiation, filling). Water stress was evaluated by monitoring soil water potential. Two fully-equipped imaging cabinets were set up to characterize plant morphology using high definition color cameras (top and side views) and to measure plant stress using RGB cameras. The response of potato plants to water stress depended on the intensity and duration of the stress. Three-dimensional morphological images of the underground organs of potato plants in pots were recorded using a 1.5 T MRI scanner. A significant difference in growth kinetics was observed at the early growth stages between the control and stressed plants. Quantitative PCR analysis was carried out at molecular level on the expression patterns of selected drought-responsive genes. Variations in stress levels were seen to modulate ABA and drought-responsive ABA-dependent and ABA-independent genes. Conclusions This methodology, when applied to the phenotyping of potato under water deficit conditions, provides a quantitative analysis of leaves and tubers properties at microstructural and molecular levels. The approaches thus developed could therefore be effective in the multi-scale characterization of plant response to water stress, from organ development to gene expression.

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