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Application of Nonlinear Dynamic Models of the Oculo-Motor System in Diagnostic Studies in Neurosciences

Published on: 30th October, 2023

The purpose of this work is to implement methods and develop tools for nonlinear dynamic identification of the Oculomotor System (OMS) “input-output” in the form of Multidimensional Transient Functions (MTF) based on eye tracking data and their use in an information system for diagnosing the psychophysiological state of a person. The object of the study is the process of diagnosing the psychophysiological state of an individual based on innovative eye-tracking technology. The subject of the research is computational algorithms and software for determining diagnostic features based on identification data of compulsory medical insurance in the form of MTF, constructing a Bayesian classifier using machine learning in the established space of the most informative features. A methodology has been developed and implemented for the experimental study of human compulsory mental health using innovative eye-tracking technology to record compulsory mental health responses to test visual stimuli. The obtained empirical data from input-output studies are used for the identification of OMS based on Volterra polynomials. Experimental studies of compulsory medical insurance of respondents were carried out before and after the working day. Based on the data obtained using the Tobii Pro TX300 eye tracker, the transient functions of the first, second, and third orders of the OMS were determined. Variability of second and third order transient functions was revealed for different psychophysiological states of the respondent (normal or fatigue). Thus, it seems appropriate to use MTF in diagnostic studies in the fields of neuroscience and psychology. Information technology for diagnosing human psychophysiological conditions has been further developed through the use of compulsory health insurance information models based on Volterra polynomials as a source of primary data. This allows for an increase in the accuracy of OMS modeling and, consequently, enhances the reliability of diagnosis within the framework of the proposed heuristic features. A set of heuristic features is proposed, which are determined using integral and differential transformations of the MTF OMS. The information content of individual features and all possible combinations of them in pairs was studied using the Probability of Correct Recognition (PCR) indicator. Two-dimensional feature spaces with the maximum PCR value (0.938) were identified during the diagnosis of a person’s psychophysiological state.
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Advances in deep learning-based cancer outcome prediction using multi-omics data

Published on: 1st May, 2023

Cancer prognosis reflects a complex biological process measured by multiple types of omics data. Deep learning frameworks have been proposed to integrate multi-omics data and predict patient outcomes in different cancer types, potentially revolutionizing cancer prognosis with superior performance. This minireview summarizes the advances in the strategies for multi-omics data integration and the performance of different deep learning models in prognosis prediction of diverse cancer types using multi-omics data published in the past 18 months. The challenges and limitations of deep learning models for predicting cancer outcomes based on multi-omics data are discussed.
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A Rare Symptomatic Case of Heterozygous Cerebro-Tendinous Xanthomatosis (CTX) Treated with Urso-Deoxycholic Acid (UDCA): With Mini Review

Published on: 27th May, 2024

Cerebrotendinous Xanthamatosis (CTX) is a rare autosomal recessive disorder caused by a mutation in the CYP27A1 gene leading to impaired metabolism of cholesterol and accumulation of cholestenol and the cholesterol in various tissues such as the brain, eyes, lungs and bones and reduced formation of cheno-deoxycholic acid (CDCA). The clinical presentation is diverse, starting in the early neonatal period and progressing till adulthood unless treated early. A common neurological manifestation is a spino-cerebellar ataxia followed by spastic paraparesis. Tendon xanthoma is a classical finding that usually helps in clinching the diagnosis but may not be present in all cases. Brain MRI also reveals characteristic abnormalities with cerebellar atrophy and hyper-intensities in the dentate nucleus and surrounding cerebellar white matter on T1weighted images. It is a rare cause of treatable ataxia in young individuals. Treatment is by replacement by CDCA or Urso-deoxycholic acid (UDCA). Supplemented with statins these individuals also have premature atherosclerosis causing death due to athero-sclerotic coronary artery disease. Here a rare case of symptomatic heterologous CYP27A1 mutation is reported with syndrome of spino-cerebellar ataxia treated with UDCA.
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Synergistic interactions of sperm impairing bacteria: Impact on pregnancy outcome in mouse model

Published on: 9th April, 2021

OCLC Number/Unique Identifier: 9023207277

Earlier in our laboratory, the role of various individual sperm impairing microorganisms on sperm parameters and female infertility has been elucidated at higher doses. As, multiple bacterial species tend to exert more pathogenic effect in comparison to single organism hence, present study was carried out to evaluate that if consortia of these sperm impairing organisms can lead to infertility in female mice at sub fertility dose. For this, impact of individual bacterial strains of Escherichia coli, Pseudomonas aeruginosa, Pseudomonas aeruginosa, Klebsiella pneumoniae and consortia of Escherichia coli and Pseudomonas aeruginosa, Escherichia coli and Pseudomonas aeruginosa, Escherichia coli and Klebsiella pneumoniae was examined on the motility, viability of mouse spermatozoa and fertility outcome. The results showed that the individual bacterial strains of E. coli, S. marcescens and K. pneumoniae could led to immobilization of spermatozoa by agglutination and P. aeruginosa led to immobilization of spermatozoa without agglutination. Also, all of them led to 100% sperm death in 45 min of incubation. In case of consortia of bacterial strains, the results showed sperm agglutination in all the cases and they were able to induce 100% sperm death at 30 min of incubation time. Further, in vivo studies were carried out to evaluate the impact of individual bacterial strains and consortia of bacterial strains on the fertility outcome in female Balb/c mice. For this, female mice were administered intravaginally with 101 cfu/20µl of individual bacterial strains or consortia of strains for 10 consecutive days or PBS. The results showed that both individual bacterial strains and consortia of bacterial strains were able to efficiently colonize the mouse vagina. Further, control group receiving phosphate buffer saline and groups receiving individual bacterial strains showed all the pregnancy related changes viz. abdominal distension, string of pearls on palpation as well as delivery of pups on completion of gestation period and delivery of pups. The histological examination of reproductive organs viz. uterus and ovary, of the female mice receiving PBS or individual bacterial strains showed the formation of corpus luteum in the ovary and the formation of decidua’s in the uterus, indicative of pregnancy. However, mice receiving consortia of bacterial strains did not show any pregnancy related changes throughout the experiment. Thus, these results indicate that the presence of consortia of sperm impairing microorganisms in vaginal milieu is efficient in provoking infertility even at subfertility doses.
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A Study of Doppler velocimetry in pre-eclampsia patients, and their perinatal outcome

Published on: 21st April, 2021

OCLC Number/Unique Identifier: 9023205934

Pre eclampsia and IUGR are important causes of maternal and perinatal morbidity and mortality. Pre eclampsia is a multisystem disorder, in normal pregnancies trophoblastic invasion transforms high resistance spiral arteries into low impedance uteroplacental circulation. This uteroplacental circulation remains incomplete in pre eclampsia and IUGR. This study is to correlate the Doppler Findings with the Fetal Outcome in pre eclampsia patiens, and helps decide appropriate time for delivery with least perinatal morbidity.
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A case report of uterine inversion after home delivery

Published on: 26th April, 2021

OCLC Number/Unique Identifier: 9024345346

Puerperal acute uterine inversion is a rare obstetric condition observed as a serious complication during the third stage of labor. Reported as one of the causes of postpartum haemorrhage, it commonly requires quick diagnosis and surgical treatment in order to reduce morbidity and lethality. The authors describe a case of uterine inversion with hypovolemic shock after home birth, brought to Hospital Leonor Mendes de Barros. The purpose of this article is to describe a case of acute uterine inversion and its management and a review of aetiology, predictive and risk factors, diagnosis and treatment.
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Determinants of health seeking behaviour of women with obstetric fistula in south- south and south east, Nigeria: A review of the impact of availability and quality of health care services through a cross-sectional study

Published on: 4th May, 2021

OCLC Number/Unique Identifier: 9041186095

Background: Obstetric fistula is a condition that results from obstructed labour, which occurs when the baby cannot pass through the mother’s birth canal because it either does not come head first or is too large for her pelvis. Prompt medical intervention, often including Caesarean section, permits a safe delivery for both mother and child. Despite this possibility, yearly, thousands of women across the country receive no such aid and their labour is a futile agony lasting between three and five days, with uterine contractions constantly forcing the baby, usually head first, against the organs of the pelvic and unyielding pelvic bone resulting in Vesico Vaginal Fistula (VVF). The main thrust of this study was to examine how health system factors affect health seeking behaviour of women with obstetric fistula in Akwa Ibom and Ebonyi States, Nigeria. Methods: Qualitative and descriptive research approaches were adopted for the study and a total sample of two hundred and sixteen (216) respondents comprising of one hundred and fifty (150) post fistula repair operative patients and sixty six (66) health workers were purposively selected using simple random techniques. The data were analyzed using thematic analysis and tables of frequency. Results: The respondents views showed that availability of treatment centre and quality of health care services influenced health seeking behaviour of women with obstetric fistula in Nigeria. Conclusion: The study indicated that health seeking behaviour of women with obstetric fistula is a major challenge in Nigeria. Establishment and proper equipment of obstetric fistula treatment centres as well as subsidization of the cost of treatment to allow women with this health problem to access health care services are strongly recommended. Therefore, government at all level and non-governmental organizations need to educate the women and create awareness on the causes and dangers of VVF.
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Sensitivity and Intertextile variance of amylase paper for saliva detection

Published on: 12th February, 2020

OCLC Number/Unique Identifier: 8550282807

Contemporary forensic science hinges on DNA analysis to link an individual to a crime scene. Sources of DNA include bodily fluids, including saliva. Amylase is a primary enzyme in human saliva and thus, if detected, indicates possible presence of human saliva. Amylase paper can be used to map apparent saliva and thus provide a source from which DNA can be extracted and analyzed. In this study, the sensitivity of amylase paper was tested, firstly, using dilutions of an amylase standard and subsequently also tested using fresh human saliva. Three trials total were conducted, the first two using an amylase standard and a third using fresh saliva. The first two trials demonstrated firstly that detection of amylase is dependent on the material upon which amylase is deposited. The third trial demonstrated that amylase levels in human saliva may drop significantly somewhere around 48-72 hours. All trials were consistent in the concentration of amylase that Seratec Amylase Paper will detect.
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Risk factors for esophageal strictures in children and adolescents with eosinophilic esophagitis

Published on: 27th October, 2022

Studies in children with eosinophilic esophagitis (EoE) have reported esophageal strictures but none have examined risk factors associated with strictures. Aim: To assess risk factors associated with strictures in children with EoE. Methods: In this retrospective study, children with EoE seen over 20 years were separated into two groups; with and without strictures. Physical features, CBC, endoscopic findings, and biopsy of the distal and mid-esophagus were captured. Statistical significance with p - value and multivariate logistic regression was done. Results: Total patients 222 and 20 (9.1%) had strictures. Mean age of stricture patients 12.7 years (range 7-18) and non-stricture 9.3 years (range 1-17) (p = 0.006). Among stricture patients following were prevalent and significant; dysphagia (stricture 100% vs. non-stricture 41.6%, p = 0.0005) and food impaction (70.04% vs. 4%, p = 0.0005); EGD: rings and exudates were strongly associated with stricture, 45.0% vs. 4.5%, p = 0.0005 and 60% vs. 30.7%, p = 0.008, respectively. Abdominal pain was lower in the stricture group (5% vs. 31.2%, p = 0.017). Eosinophil counts were numerically more in the stricture group but not significant. Multivariate logistic regression confirmed that strictures are likely to occur among patients with dysphagia (p = 0.02, OR = 11.7, 95% LCL 2.0) and food impaction (p = 0.0001, OR = 80.9, 95% LCL 15.4), respectively, adjusted for age and gender. Conclusion: EoE children with dysphagia or food impaction have a higher chance of having an esophageal stricture. These EoE children 12 years or over with exudates or rings on endoscopy, should be treated and carefully monitored, to reduce the risk of stricture formation.
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Primary myelofibrosis is not primary anymore since the discovery of MPL515 and CALR mutations as driver causes of mono-linear megakaryocytic and dual megakaryocytic granulocytic myeloproliferation and secondary myelofibrosis

Published on: 15th April, 2019

OCLC Number/Unique Identifier: 8164054496

Primary myelofibrosis (PMF) is a distinct clinicopathological myeloproliferatve disease (MPD) not preceded by any other MPD ET, PV, CML,... Combined use of bone marrow histology and increased erythrocyte counts above 5.8x1012/L can replace increased red cell mass at time of presentation as the pathognomonic clue for the correct diagnosis of hetero/homozygous or homozygous mutated PV. Erythrocyte counts are in the normal range below 5.8x1012/L in heterozygous JAK2V617F mutated ET and prodromal PV but above 5.8x1012/L in heterozygous-homozygous or homozygous mutated PV. The bone marrow cellularity and morphology in pre-fibrotic ET, prodromal PV and PV carrying the JAK2V617F mutation are overlapping showing clustered increase of large mature pleomorphic megakaryocytes (M) with no increase of cellularity (<60%) in ET. The bone marrow is hypercellular (60%-80%) due to increased erythropoiesis megakaryopoiesis (EM) in prodromal and classical PV and trilinear hypercellular (80%-100% due increased megakaryopoiesis, erythropoiesis and granulopoiesis (EMG) in advanced PV and masked PV. Bone marrow cellularity ranging from normal (<60%) in ET to increased erythropoiesis (EM) in prodromal PV to hypercellular (80-100%) in advanced PV and masked PV largely depends on increasing JAK2V617F mutation load from low to high on top of other biological MPN variables like constitutional symptoms during long-term follow-up. MPL515 mutated ET is featured by an increase of clustered small and giant megakaryocytes with hyper-lobulated staghorn-like nuclei in a normal cellular bone marrow. The third entity of pronounced JAK2/MPL wild type ET associated with primary megakaryocytic granulocytic myeloproliferation (PMGM) without PV features proved to be caused by calreticulin (CALR) mutation. CALR mutated thrombocythemia is characterized by dual proliferation of megakaryocytic and granulocytic bone marrow proliferation of dense clustered large to giant immature dysmorphic megakaryocytes with bulky (bulbous) hyperchromatic nuclei, which are not seen in MPL515-mutated Thrombocythemia and JAK2V617F-Thrombocythemia, prodromal PV and classical PV. 
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