Biochemical Changes In Tissues Research Articles

Determination of Malondialdehyde, Nitric Oxide, Reduced Glutathione, Sialic Acid and Ceruloplasmin Levels in Sheep Liver Tissue With Hydatic Cyst

Cystic echinococcosis is a prevalent helminth-zoonosis that poses a significant threat to human and animal health worldwide. Although it typically shows an asymptomatic clinical course, it has been reported to cause many damages and biochemical changes in tissues and organism. The aim of this study was to investigate the concentrations of nitric oxide (NO), reduced glutathione (GSH), malondialdehyde (MDA), ceruloplasmin (Cp), and total sialic acid (TSA) in sheep liver tissue affected by cystic echinococcosis. The study was carried out on sheep between 4-5 years of age brought to the slaughterhouse in the Igdir territory. The livers were examined post-mortem for cystic echinococcosis and cystic structures. Sheep liver tissues that tested positive for protoscolex were designated as the ‘infected group’, while healthy sheep liver tissues without lesions were assigned to the ‘control group’. The results showed significantly higher levels of NO, MDA, Cp and TSA in the infected group compared to the control group (p<0.05), while GSH levels were significantly lower (p<0.05). These findings indicate that cystic echinococcosis in sheep is closely associated with mechanisms of inflammation, oxidative stress, and tissue damage. Moreover, our study provides insights into the oxidative response of cystic echinococcosis in liver tissue and enhances our understanding of the disease’s pathogenesis.

Gallic acid attenuates the Chronic construction injury of sciatic nerve induced neuropathic pain in mice

Gallic acid (GA) is one of the natural flavonoids and it is known to protect the neuronal system from various endogenous neurodegenerative processes. The present study is focused on evaluating the role of GA in chronic construction injury (CCI) of sciatic nerve-induced neuropathic pain. The test compound i.e., gallic acid (20 and 40mg/kg), and reference compound i.e., pregabalin (PrG: 5mg/kg) were administered intravenously for 10 consecutive days. The sciatic nerve injury-induced neuralgic sensations were assessed with multiple test methods like acetone drop, pinprick, plantar, tail-flick, and tail pinch tests at different time points i.e., 0, 4th, 8th, 12th, and 16th days. The biochemical level changes i.e., thiobarbituric acid reactive substances (TBARS), reduced glutathione (GSH), superoxide anion, calcium, myeloperoxidase (MPO), and tumor necrosis factor–α (TNF-α) were estimated in sciatic nerve samples. The administration of GA and PreG was shown a significant ameliorative effect against the CCI-induced pain response in a dose-dependent manner. Moreover, it also attenuated the tissue biochemical changes. The observed effects of GA were similar to reference drug PreG treated groups. Hence, GA has neuroprotective and pain relief effects against the CCI-induced neuralgia. It may be due to its natural free radical scavenging; regulation of inflammatory proteins; expression of antioxidant proteins, reduction of intracellular free calcium, and prevention of neuroinflammatory actions.

Preliminary Study of Control and Biochemical Characteristics of Giant Hogweed (Heracleum sosnowskyi Manden.) Treated with Microwaves

There is an urgent need to develop new compensatory and human-safe methods for controlling invasive Heracleum species. This research aimed to determine the effectiveness of H. sosnowskyi control under microwave radiation and biochemical changes in tissues and sap after irradiation. In field experiments in southern Poland, the plants were cut and irradiated with a device generating electromagnetic waves (2.45 GHz, 32.8 kW/m2). The control efficacy of plants in the rosette phase irradiated for 5, 10, or 15 min was 20%, 100%, and 100%, respectively. The control efficacy of plants in the flowering phase irradiated for 7.5 or 15 min was 66% and 100%. The metabolomic analysis of tissues and sap of irradiated H. sosnowskyi showed significant changes, mainly in the content and composition of proteins and sugars. In tissues, the treatments resulted in protein denaturation and significant changes in the metabolism of amino acids and the glyoxylate and galactose pathways. The sap was rich in sugars, glutamic acid, glutamine, homoserine, serine, and methionine. More changes in metabolite levels were observed in the tissues irradiated for 7.5 min. In conclusion, microwave radiation of H. sosnowskyi for longer times, e.g., 10 and 15 min, efficiently controls it.

Automated Computational Detection of Disease Activity in ANCA-Associated Glomerulonephritis Using Raman Spectroscopy: A Pilot Study.

Biospectroscopy offers the ability to simultaneously identify key biochemical changes in tissue associated with a given pathological state to facilitate biomarker extraction and automated detection of key lesions. Herein, we evaluated the application of machine learning in conjunction with Raman spectroscopy as an innovative low-cost technique for the automated computational detection of disease activity in anti-neutrophil cytoplasmic autoantibody (ANCA)-associated glomerulonephritis (AAGN). Consecutive patients with active AAGN and those in disease remission were recruited from a single UK centre. In those with active disease, renal biopsy samples were collected together with a paired urine sample. Urine samples were collected immediately prior to biopsy. Amongst those in remission at the time of recruitment, archived renal tissue samples representative of biopsies taken during an active disease period were obtained. In total, twenty-eight tissue samples were included in the analysis. Following supervised classification according to recorded histological data, spectral data from unstained tissue samples were able to discriminate disease activity with a high degree of accuracy on blind predictive modelling: F-score 95% for >25% interstitial fibrosis and tubular atrophy (sensitivity 100%, specificity 90%, area under ROC 0.98), 100% for necrotising glomerular lesions (sensitivity 100%, specificity 100%, area under ROC 1) and 100% for interstitial infiltrate (sensitivity 100%, specificity 100%, area under ROC 0.97). Corresponding spectrochemical changes in paired urine samples were limited. Future larger study is required, inclusive of assigned variables according to novel non-invasive biomarkers as well as the application of forward feature extraction algorithms to predict clinical outcomes based on spectral features.

Wnt/β-catenin antagonist pyrvinium rescues high dose isoproterenol induced cardiotoxicity in rats: Biochemical and immunohistological evidences

The up-regulation of Wnt/β-catenin pathway induces cardiac function abnormalities, hypertrophy, and fibrosis in diabetic hypertensive and pressure overload models. The present study investigates the cardioprotective effects of Wnt/β-catenin inhibition on isoproterenol (ISO) induced cardiotoxicity in rats. ISO was administered at a dose of 85 mg/kg (s.c) for 2 days. Wnt/β-catenin inhibitor pyrvinium (60 μg/kg, p.o) was given 2h prior and glibenclamide at a dose of 5 mg/kg; p.o, 2 h after ISO injection. Cardiac function parameters were assessed on isolated hearts by using automated Biopac apparatus. The β-catenin transcription and expression was detected by RT-PCR technique and immunohistochemical method. Serum and cardiac tissue biochemical changes including cardiac troponin-I, CK-MB, LDH, anti-oxidant enzyme levels, inflammatory cytokines, and membrane associated Na+/K + ATPase and Ca2+ATPase and caspase-3 activity, collagen content, fibronectin protein levels were evaluated in various study groups. Histological studies were also carried out to analyze the cardiomyocyte damage, hypertrophy, fibrosis, and necrosis, while α-SMA, TGF-β expression was checked by immunostaining. ISO administration enhanced β-catenin gene expression and transcription which promoted oxidative and nitrosative stress, inflammatory cytokine release, reduced ATP levels, induced over-expression of fibrotic proteins resulting in cardiac hypertrophy, myocardial necrosis, functional and histological changes. However, antagonism of Wnt/β-catenin pathway attenuated these ISO induced pathological manifestations. Notably, the co-treatment with ATP-sensitive K+ channel inhibitor partially, reduced the cardioprotective effects of Wnt/β-catenin blocker pyrvinium in ISO rats. Thus Wnt/β-catenin inhibition exhibits cardioprotective in ISO model by anti-oxidant, anti-inflammatory, anti-fibrotic properties and by possible involvement of ATP-sensitive potassium channel activation.

HAK PERLINDUNGAN SOSIAL BAGI LANJUT USIA MENURUT UNDANG-UNDANG NOMOR 13 TAHUN 1998 DAN HUKUM ISLAM DI KECAMATAN MEDAN AMPLAS

Elderly is a natural and continuous process that undergoes anatomical, physiological, biochemical changes in tissues or the organs which ultimately affects the state of function and the ability of the body as a whole. The Republic of Indonesia has an obligation to prosper the elderly by providing social protection for its people. This is evidenced by the existence of a special law related to the welfare of the elderly, namely the Law no. 13 of 1998. How are the social protection rights for the elderly in Medan Amplas sub-district according to the Law Number 13 of 1998, How are the social protection rights for the elderly in Medan Amplas sub-district according to the Islamic law, how are the similarities and the differences in social protection rights for the elderly in Medan Amplas sub-district according to the Law No. 13 of 1998 and the Islamic Law. The Implementation of the Law no. 13 of 1998 regarding social protection rights for the elderly in Medan Amplas Sub-district is not in line with the Law no. 13 of 1998 or not implemented properly or not optimally implemented in Medan Amplas Sub-district. This is evidenced by the large number of elderly people whose rights are not fulfilled, including their social protection rights. According to the Islamic Law, the Social Protection Rights for the Elderly in Medan Amplas Sub-district is not in line with the Islamic Law. There are still many elderly people who do not receive assistance and the assistance received by the elderly is not evenly distributed. Even Muslim institutions that are specifically for distributing aid to the elderly or the poor are also less effective in promoting the welfare of the elderly. The similarities between the law and the Islamic law related to the social protection rights for the elderly are that they both have special institutions that oversee the social protection rights of the elderly, are both the responsibility of the state and both meet the needs of the elderly. The most prominent difference is the existence of standard rules from the law, whereas in Islam there are no written standard rules. Keywords : Social Protection Rights, Elderly, The Law on Social Protection for the Elderly, Social Protection for the Elderly According to the Islamic Law.

Effect of Pre and Post Infection Administration of Zinc and Selenium on some Biochemical indices in Wistar Rats infected with Trypanosoma brucei

Aims: The effect of pre and post-infection administration of zinc and selenium on Trypanosoma brucei brucei infection in wistar rats on some biochemical parameters were investigated.
 Study Design: The study was designed to evaluate the effect of pre and post infection administration of zinc and selenium on Trypanosoma brucei brucei infection in wistar rats.
 Place and Duration of Study: The study was conducted at the Nigerian Institute for Trypanosomiasis Research (NITR), Kaduna and Department of Biochemistry, Ahmadu Bello University (ABU), Zaria, between January 2014 to March 2014.
 Methodology: Fifty four (54) wistar rats were divided into nine groups of six (6) rats each. Groups III-IX were infected intraperitoneally with 1x103parasite load. Animals in group III were infected but untreated while the infected/treated groups received prophylactic (IV, V and VI) and therapeutic (VII, VIII and IX) treatment with zinc and selenium 50mg/kg and 10mg/kg body weight respectively.
 Results: Results obtained showed that serum alkaline phosphatase (ALP), alanine amino transferase (ALT) and aspartate amino transferase (AST) activities in the infected-untreated control group were significantly different (P<0.05) and higher as compared to infected treated and normal control. Similarly, the two minerals significantly decreased (P<0.05) the levels of Urea and Creatinine in the infected treated when compared to the infected untreated rats, with the exception of creatinine value of the post-infected treated with selenium where there was no significant (P>0.05) decrease. On the other hand, a significant (P<0.05) increase in serum levels of total Protein, albumin and total bilirubin and no significant (P>0.05) difference in direct bilirubin was recorded in infected treated group compared to infected untreated and normal control.
 Conclusion: It was concluded that administration of zinc and selenium ameliorate the infection-induced biochemical changes in tissues and organs associated with Trypanosoma brucei brucei infection in Wistar rats.

Wnt/β-Catenin Antagonist Pyrvinium Exerts Cardioprotective Effects in Polymicrobial Sepsis Model by Attenuating Calcium Dyshomeostasis and Mitochondrial Dysfunction.

Calcium dysregulation and mitochondrial dysfunction are key elements in the development of sepsis-induced cardiac dysfunction. Evidences have suggested that inhibition of Wnt/β-Catenin signalling prevents cardiac dysfunction and remodelling in surgical, hypertension and pressure overload models. The present study investigated the effects of Wnt/β-Catenin inhibitor on calcium overload and mitochondrial dysfunction in rat sepsis model of cardiomyopathy. Induction of sepsis by cecal ligation puncture (CLP) resulted in the up-regulation of cardiac β-catenin transcriptional levels and cardiac dysfunction depicted by increased serum lactate dehydrogenase, CK-MB levels reduced maximum (dp/dt max.) and minimum developed pressure (dp/dt min.), increased LVEsDP and relaxation constant tau values. Moreover, oxidative and inflammatory stress, immune cell infiltration, increased myeloperoxidase activity, enhanced caspase-3 activity and fibronectin protein levels were observed in septic rat's heart. Also, septic rat's heart displayed mitochondrial dysfunction due to mPTP opening, increased calcium up-regulation in left ventricular apex tissues and whole heart, increased collagen staining, necrosis and structural damage. Pre-treatment with Wnt/β-Catenin antagonist attenuated sepsis-induced serum and tissue biochemical changes, cardiac dysfunction and structural alterations by inhibiting mitochondrial mPTP opening and restricting calcium overloading in cardiac tissue.

Role of magnetic resonance spectroscopy in adequately differentiating neoplastic from non-noplastic and low-grade from high-grade lesions in brain masses

Objective: The aim of this study was to provide objective data on the clinical utility of MRS in difference diagnosis of brain lesion and also to provide metabolite ratios neoplastic from non-neoplastic lesion and low-grade from high-grade neoplasms. Method: A prospective study conducted at Sri Aurobindo Institute of Medical Sciences and PG Institute, Indore and Department of Radiology after approval from the ethical and research committee. The duration of this study was June 2018 to July 2020. A total of 102 patients (age range 21-60 years) Who were found to have cerebral mass lesion by computed tomography (CT) and convention MRI and from whom high quality MRS imaging data were obtained, were prospectively assessed and included in this study.Result: The mean age was 53.5±3.15 (range 28-70 years). Majority of the patients in the study were males forming 70 (68.6%) and females 32 (31.3%). Various spectroscopy ratios like Cho/Cr, Cho/NAA, Cho+Cr/NAA, NAA/Cr were calculated with the help of MRS. Conclusion: MRS gives information about the biochemical changes in tissues, which appear earlier than the structural changes, and so, in recent times, MRS has been used as a noninvasive method for the diagnosis and grading of brain tumors. All neoplastic lesion showed increase Cho and decreased NAA and this was more prominent in high-grade neoplasms. While we did not detect any LL peak in all 27 low-grade neoplasms, but 60 high-grade neoplasms showed an LL peak.

APPROACHES TO DETERMINING POST-MORTEM INTERVAL

The main approaches and problems that arise when evaluating postmortem interval are defined, ways to avoid such problems are suggested. According to the results of scientific papers analysis on that topic, it was established that in the context of post-mortem changes studies such changes developed differently during a specific period of time passed from the time of death, they also appeared in a variety of forms as a result of environmental factors influence. The factors having a significant impact on postmortem changes were specified. A review of modern methods for determining post-mortem interval was conducted and methods for further improvement of the assessment of postmortem interval were proposed.
 The use of methods for assessing the PMI by means of the cadaveric phenomena does not always provide for investigating authorities necessary information due to the relatively large time interval in methods based on such changes. Researchers also note the presence of certain shortcomings in the use of existing methods.
 Current research using laser polarimetry methods have made it possible to establish post-mortem interval with relatively high accuracy. However, high prices and limited availability of equipment used in laser polarimetry methods preclude from using them in everyday practice of forensic medical examiners.
 When conducting studies on histological and biochemical changes in tissues of internal organs, certain morphological (decrease in optical density) and biochemical (changes in the levels of biochemical markers) changes in the early post-mortal period were identified, which will enable the development of specific tables where such changes would be linked to a specific post-mortem time period during certain short periods of time. Although changes in the conducted research were recognized only in the early post-mortem period and only in muscle tissue, further research on other tissues that are more resistant to post-mortem changes are likely to provide results that would be less affected by ambient temperature, exposure of a corpse to the sun rays, amount of clothing on a corpse, etc.) and also would be more accurate than most existing methods.

Evaluation of polymorphisms in repair and detoxification genes in alcohol drinkers and non-drinkers using capillary electrophoresis.

Alcohol use disorder (AUD) causes about 3.3 million deaths around the world each year. It is the primary risk factor for the global burden of diseases in American countries. Long-term abuse of alcohol induces numerous molecular and biochemical changes in tissues exposed to alcohol. The toxic effects of alcohol are mediated by DNA damage through various mechanisms, such as induction of oxidative damage, DNA adducts, crosslinks, and DNA strand breaks. The main aim of the current study was to compare the frequency of SNP polymorphisms in XRCC1 (rs7997782) and GSTP1 (rs1695) genes involved in DNA repair of single strand breaks (SSB) and xenobiotic detoxification between alcohol addicts and a control group comprised of non-drinkers. Genetic polymorphisms were identified following allelic specific PCR designed to generate the amplicons containing the variants. Then amplicons were sequenced, and sequences were aligned against the human genome reference deposited in GenBank using the CLC Sequence Viewer software (version 7.6.1). The GG homozygotes in rs1695 (GSTP1) were significantly (p = 0.023) 3.8x more frequent among those with AUD when compared to the control group. No SNP variation was observed in rs7997782 (XRCC1). rs1695 variant has been associated with susceptibility to various diseases, including those related to alcohol consumption.

Detection and Characterization of a Biochemical Signature Associated with Diabetic Nephropathy Using Near-infrared Spectroscopy on Tissue Sections.

Histological evaluation of renal biopsies is currently the gold standard for acquiring important diagnostic and prognostic information in diabetic nephropathy (DN) patients. Nevertheless, there is an unmet clinical need for new biomarkers that allow earlier diagnosis and risk stratification. As biochemical changes in tissues must precede any symptomatic or morphological expression of a disease, we explored the potential of near-infrared (NIR) spectroscopy in the detection of a biochemical signature associated with DN. Kidney tissue sections were investigated using NIR spectroscopy, followed by principal component analysis and soft independent modelling of class analogy. A biochemical signature indicative of DN was detected, which enabled perfect discrimination between tissue sections with normal histological findings (n = 27) and sections obtained from DN patients (n = 26). Some spectral changes related to carbamoylation and glycation reactions appeared to be similar to the ones obtained in patients with DN. In addition, treatment with the deglycating enzyme fructosamine-3-kinase resulted in partial to pronounced restorations of the spectral pattern. Significant relationships were found between spectral features and laboratory parameters indicative of glycemic and uremic load, such as hemoglobin A1c, urea, creatinine, estimated glomerular filtration rate, and proteinuria. The presented method could be a useful tool to complement histopathological analysis in order to prevent or delay further disease progression, especially in the setting of post-transplant surveillance kidney biopsies.

Superior protective effects of febuxostat plus alpha-lipoic acid on renal ischemia/reperfusion-induced hepatorenal injury in rats

A complex cascade of pathological events including oxidative stress and inflammation is involved in ischemia/reperfusion (I/R)-induced local and remote organ injuries. This study was performed to evaluate the effects of febuxostat (FEB), a selective xanthine oxidase (XO) inhibitor, and alpha-lipoic acid (ALA), a strong antioxidant, on the kidney and liver changes induced by renal I/R in rats. Renal I/R was induced in rats by clamping renal pedicles for 1 h followed by 2 h reperfusion. Fifty rats were assigned to five groups as follows: sham operated; vehicle + I/R; FEB + I/R; ALA + I/R, and (FEB + ALA) + I/R. Drug treatment was given 24 h and 1 h before I/R induction. Serum and tissue biochemical parameters and histopathological changes were examined after reperfusion. Serum creatinine, urea and uric acid levels, and alanine aminotransferase and aspartate aminotransferase activities were elevated after renal I/R. An increase in XO, myeloperoxidase, and malondialdehyde levels was observed in kidney and liver tissues with a concomitant decrease in both the glutathione level and superoxide dismutase activity. In addition, kidney and liver sections of vehicle-pretreated rats subjected to I/R exhibited a pronounced alteration in microanatomy. FEB, ALA, or FEB + ALA pretreatment attenuated the serum and tissue biochemical changes with amelioration of the histopathological changes in both the kidney and liver. The findings of this study revealed that FEB in combination with ALA had a greater protective effect than either drug alone. Thus, FEB and ALA co-administration may provide a potential superior therapeutic strategy to protect the kidney and liver against renal I/R-induced injury.

Role of Infrared Spectroscopy and Imaging in Cancer Diagnosis.

Cancer is a major global health issue. It causes extensive individual suffering and gives a huge burden on the health care in society. Despite extensive research and different tools have been developed it still remains a challenge for early detection of this disease. FTIR imaging has been used to diagnose and differentiate the molecular differences between normal and diseased tissues. Fourier Transform Infrared Spectroscopy (FTIR) is able to measure biochemical changes in tissue, cell and biofluids based on the vibrational signature of their components. This technique enables to the distribution and structure of lipids, proteins, nucleic acids as well as other metabolites. These differences depended on the type and the grade of cancer. We emphasize here, that the FTIR spectroscopy and imaging can be considered as a promising technique and will find its place on the detection of this dreadful disease because of high sensitivity, accuracy and inexpensive technique. Now the medical community started using and accepting this technique for early stage cancer detection. We discussed this technique and the several challenges in its application for the diagnosis of cancer in regards of sample preparations, data interpretation, and data analysis. The sensitivity of chemotherapy drugs on individual specific has also discussed. So far progressed has done with the FTIR imaging in understanding of cancer disease pathology. However, more research is needed in this field and it is necessary to understand the morphology and biology of the sample before using the spectroscopy and imaging because invaluable information to be figured out.

Biochemical Changes in Tissues and Synovial Fluid of Hip Joint in Congenital and Degenerative-Dystrophic Diseases in Children and Adolescents

Results of biochemical analysis of hip tissues (femoral head cartilage, proximal femur bone tissue, scarry tissue from hip cavity) and synovial fluid in 72 children and adolescents (aged 1 - 18 years) with congenital and pathologic hip dislocation, Legg-Calve-Perthes disease, femoral head aseptic necrosis and early coxarthrosis are presented. In tissue samples the content of hydroxyproline, hexuronic acids and hexoses was determined. In synovial fluid the content of hyaluronic acid, total protein and protein fractions, albumin, glucose and alkaline phosphatase activity was analyzed. It was detected that in congenital and acquired hip pathology the articular cartilage showed increased content of hydroxyproline, disorders of glycosaminoglycan metabolism and shift in glycoprotein metabolism indicative of destructive changes of basic cartilaginous tissue substance. Changes of synovial fluid chemical composition confirmed the disturbance of synovium permeability and were closely related to the clinical picture of metabolic-dystrophic changes in the joint.

Biochemical Changes in Tissues and Synovial Fluid of Hip Joint in Congenital and Degenerative-Dystrophic Diseases in Children and Adolescents

Results of biochemical analysis of hip tissues (femoral head cartilage, proximal femur bone tissue, scarry tissue from hip cavity) and synovial fluid in 72 children and adolescents (aged 1 - 18 years) with congenital and pathologic hip dislocation, Legg-Calve-Perthes disease, femoral head aseptic necrosis and early coxarthrosis are presented. In tissue samples the content of hydroxyproline, hexuronic acids and hexoses was determined. In synovial fluid the content of hyaluronic acid, total protein and protein fractions, albumin, glucose and alkaline phosphatase activity was analyzed. It was detected that in congenital and acquired hip pathology the articular cartilage showed increased content of hydroxyproline, disorders of glycosaminoglycan metabolism and shift in glycoprotein metabolism indicative of destructive changes of basic cartilaginous tissue substance. Changes of synovial fluid chemical composition confirmed the disturbance of synovium permeability and were closely related to the clinical picture of metabolic-dystrophic changes in the joint.

Quantitative rotating frame relaxometry methods in MRI.

Macromolecular degeneration and biochemical changes in tissue can be quantified using rotating frame relaxometry in MRI. It has been shown in several studies that the rotating frame longitudinal relaxation rate constant (R1ρ ) and the rotating frame transverse relaxation rate constant (R2ρ ) are sensitive biomarkers of phenomena at the cellular level. In this comprehensive review, existing MRI methods for probing the biophysical mechanisms that affect the rotating frame relaxation rates of the tissue (i.e. R1ρ and R2ρ ) are presented. Long acquisition times and high radiofrequency (RF) energy deposition into tissue during the process of spin-locking in rotating frame relaxometry are the major barriers to the establishment of these relaxation contrasts at high magnetic fields. Therefore, clinical applications of R1ρ and R2ρ MRI using on- or off-resonance RF excitation methods remain challenging. Accordingly, this review describes the theoretical and experimental approaches to the design of hard RF pulse cluster- and adiabatic RF pulse-based excitation schemes for accurate and precise measurements of R1ρ and R2ρ . The merits and drawbacks of different MRI acquisition strategies for quantitative relaxation rate measurement in the rotating frame regime are reviewed. In addition, this review summarizes current clinical applications of rotating frame MRI sequences. Copyright © 2016 John Wiley & Sons, Ltd.

Computational chemical imaging for cardiovascular pathology: chemical microscopic imaging accurately determines cardiac transplant rejection.

Rejection is a common problem after cardiac transplants leading to significant number of adverse events and deaths, particularly in the first year of transplantation. The gold standard to identify rejection is endomyocardial biopsy. This technique is complex, cumbersome and requires a lot of expertise in the correct interpretation of stained biopsy sections. Traditional histopathology cannot be used actively or quickly during cardiac interventions or surgery. Our objective was to develop a stain-less approach using an emerging technology, Fourier transform infrared (FT-IR) spectroscopic imaging to identify different components of cardiac tissue by their chemical and molecular basis aided by computer recognition, rather than by visual examination using optical microscopy. We studied this technique in assessment of cardiac transplant rejection to evaluate efficacy in an example of complex cardiovascular pathology. We recorded data from human cardiac transplant patients’ biopsies, used a Bayesian classification protocol and developed a visualization scheme to observe chemical differences without the need of stains or human supervision. Using receiver operating characteristic curves, we observed probabilities of detection greater than 95% for four out of five histological classes at 10% probability of false alarm at the cellular level while correctly identifying samples with the hallmarks of the immune response in all cases. The efficacy of manual examination can be significantly increased by observing the inherent biochemical changes in tissues, which enables us to achieve greater diagnostic confidence in an automated, label-free manner. We developed a computational pathology system that gives high contrast images and seems superior to traditional staining procedures. This study is a prelude to the development of real time in situ imaging systems, which can assist interventionists and surgeons actively during procedures.

Influence of skin incision position on physiological and biochemical changes in tissue after primary total knee replacement - a prospective randomised controlled trial.

BackgroundInfluence of skin incision position on physiological and biochemical changes in tissue after primary total knee replacement. A prospective randomised controlled trial.The blood supply to the skin covering the anterior knee has been shown to arise predominantly from blood vessels on the medial side of the knee. Skin incisions for primary Total Knee Replacement (TKR) positioned medially therefore risk creating a large lateral skin flap that may be poorly perfused. Poorly perfused skin is likely to result in hypoxia at the wound edges and consequently may lead to delayed wound healing and complications.MethodsWe have carried out a randomised controlled trial (n = 20) to compare blood flow on both the medial and lateral sides of two commonly used skin incisions in TKR (midline and paramedian). We have also assessed interstitial biochemistry (glucose, pyruvate and lactate levels) in the presumed at risk lateral skin flap of both incision types.ResultsIn both incision types tissue hyper-perfusion occurs post-operatively and is maintained for at least 3 days. We found no significant difference between blood flow between the two incision types on the medial side of the incision at either day 1 (p = 0.885) or day 3 post-op (p = 0.269), or, on the lateral side of the incision (p = 0.885 at day 1, p = 0.532 at day 3). Glucose levels are maintained post-operatively in the at risk lateral flap with only minimal changes. Lactate levels rise post-operatively and remain elevated for at least 24 hours. However, the levels did not reach levels suggestive of critical ischaemia in either incision group and no significant difference was observed between incision types.ConclusionWe conclude that the use of a paramedian incision results in only minimal biochemical changes, which are unlikely to alter wound healing.Trial registrationsISRCTN06592799.

Biochemical Changes in Tissues of Wistar Albino Rats Following Exposure to Diet Incorporated with Locally Processed Fish

Biochemical Changes in Tissues of Wistar Albino Rats Following Exposure to Diet Incorporated with Locally Processed Fish