Mononuclear Infiltration Research Articles

Comparative study between the effect of mesenchymal stem cells microvesicles versus ozone on induced liver injury in adult male albino rats (Histological & Immunohistochemical study)

Liver disease accounts for approximately 2 million deaths er year worldwide. Liver fibrisis results from chronic injury to the liver. If not effectively treated in time, liver fibrosis may transform into liver cirrhosis. MVs are recognized as potential biomarkers and important theraputic tools for a wide sectrum of diseases. Medical ozone has the ability to protect the body against pathological conditions caused by oxidative stress. The influence of ozone and MVs on CCL4 induced liver fibrosis was investigated in this study. Forty-eight adult male albino rats were divided into four equal groups. I control, II CCL4 group, III ozone and IV microvesicles groups. Liver fibrosis was induced in group II, III & IV using 12 SC injections (0.5 ml/kg body weight) of CCL4 dissolved in olive oil twice ber week for weeks. Blood samples were obtained to estimate serum ALT & AST. Liver tissues were processed for measurment of GSH & SOD, light and electron microscopic examination. H&E staine sections og group II showed dilated congested sinusoids and centralveins, mononuclear infiltrations, vacuolations and dark nuclei. Ultrastructurally, group II revealed irregular heterochromatic nuclei of hepatocytes, small scanty mitochondria & vacuolations. Morphometric & statistical analyses were performed. Group III showed some improvement, however, group IV showed more imrovement. The results indicates that MVs caused marked improvement than ozone against CCL4 induced liver damage via antioxidant & antiinflammatory properties.

Abstract 13494: Histopathological Analysis Indicates a Significant Role of Myocardial Perfusion Disturbance in Tissue Lesion in Chronic Chagas’ Cardiomyopathy Experimental Model

Introduction: Coronary microvascular perfusion disturbance (MPD) is frequently found in Chronic Chagas' cardiomyopathy (CCC), but its role in tissue lesion and left ventricular dysfunction progression is still unclear. Hypothesis: As MPD is associated with more severe subendocardial myocardial injury, we tested the hypothesis that histopathological changes in subendocardial layer could be quantitatively correlated to MPD in experimental model of CCC in hamsters. Methods: Female Syrian hamsters (n=23) infected with 3.5x10 4 blood trypomastigote forms of T. cruzi ( Y strain ) and their respective controls (n=6) were studied. At 8 months after infection, the animals underwent in vivo high-resolution myocardial rest perfusion scintigraphy with 99m Tc-Sestamibi and transthoracic echocardiography. After euthanasia, the myocardial tissue was processed for quantitative histopathological analysis of mononuclear infiltrate index (MII) using hematoxylin-eosin staining and myocardial fibrosis using picrosirius staining in LV wall layers: subendocardium, mesocardium and subepicardium. Results: Fourteen animals (61%) presented rest MPD. The area of MPD was negatively correlated with LVEF (R=-0.5; p=0.02), and positively correlated with LV diastolic diameter (R=0.83; p<0.01). Animals with MPD exhibited increased extent of myocardial fibrosis in the subendocardial layer (0.67 + 0.18%) as compared to control animals (0.47 + 0.15%), p=0.03. However, the extent of total transmural fibrosis or fibrosis in other myocardial layers were similar among groups. The group with MPD presented higher values of MII in every myocardial layer as compared to controls and animals without MPD. However, only the MII in the subendocardial layer presented positive correlation with the extent of rest MPD (R=0.55, p=0.001). Conclusions: Our results indicate that MPD is significantly correlated with histopathological changes located in the subendocardial layer of LV walls. These results suggest that MPD may act as an amplifying and localizing factor for inflammation and fibrosis, suggesting a relevant role for myocardial hypoperfusion in the mechanisms of myocardial injury in CCC.

Anti-inflammatory potential of a Thai traditional remedy called Prabchompoothaweep in an animal model of acute and sub-acute inflammation

Ethnopharmacological relevancePrabchompoothaweep (PCT) is a Thai remedy which is composed of 23 herbs and has been added onto the National List of Essential Medicines (NLEM) of Thailand. This remedy has been used to treat allergic rhinitis and asthma in Thai traditional medicine for many years. Furthermore, a few studies have reported anti-allergic, anti-malarial, anti-inflammatory and antioxidant activities. Aim of the studyThis study aims to evaluate anti-inflammatory activity of PCT extract in an animal model. Materials and methodsThe animal model of acute inflammation was studied over a 24-h period, utilizing the method of carrageenan-induced paw oedema. In addition, sub-acute inflammation was examined over 7 days, using the formalin-induced paw oedema method. The treatment groups received PCT extracts, via the oral route, at 1-h prior to injection and then the sub plantar of the rat right paw was injected with the named substances to generate paw oedema. The paw thickness was measured by vernier caliper at regular intervals after injection. At the end of experiment, the blood and paw tissues were collected for measurement of pro-inflammatory cytokines and histological examination respectively. ResultsIn acute inflammation, all doses of PCT extract (250, 500 and 1000 mg/kg p.o.) significantly reduced paw thickness after the first 3 h in a dose-dependent manner and the percentage of inhibition was 38.7%, 47.8% and 49.5% respectively. The pro-inflammatory cytokines, including TNF-α and IL-1β, statistically decreased with all doses of the extracts. However, the histological examination did not reveal significant results due to the short time duration. As regards to sub-acute inflammation, all doses of PCT extract significantly reduced paw thickness with 12.78%, 23.64% and 35.78%, in a dose dependent manner. Also, the pro-inflammatory cytokines (TNF-α and IL-1β) significantly decreased at day 7. Interestingly, the histological examination of paw tissue demonstrated reductions of mononuclear infiltrations of inflammatory cells, this was observed in the group receiving PCT extracts, also in a dose-dependent manner. ConclusionTherefore, PCT exerted anti-inflammatory activity in an animal model of acute and sub-acute inflammation, suggesting that it could be used as a new source for treatment of inflammatory diseases.

Management of acute Aspergillosis in newly hatched chicks: A case report.

High and early mortalities of chicks often result in colossal economic losses. Aspergillosis, a fungal infection in chicks often occurs in the first 2 weeks of life and may be misdiagnosed as a common respiratory problem like Mycoplasmosis. Some Veterinarians are of the opinion that there is no effective way of treating Aspergillosis. This clinical case report describes the management of acute aspergillosis in chicks. Necropsies were done thrice. Grossly, congested livers, hemorrhagic nephritis, and congested lungs with whitish nodules were observed. Histologically, there were numerous multinuclear giant cells, macrophages and heterophils in the liver. The lung showed fungal hyphae and inflammatory cells. In the kidney, there was severe tubular epithelial necrosis indicated by the pyknotic nuclei, mononuclear infiltrates and haemorrhages. Considering the mortality rate, necropsy findings, microbial isolation and histopathologic observations, systemic Aspergillosis was diagnosed. The secondary bacterial infection was caused by Escherichia coli which was resistant to 8 antibiotics and susceptible only to Penstrep® (Penicillin +streptomycin). Initial resistance to copper sulphate necessitated a change to Nystatin which was used for 12 days via drinking water. Cumulative mortality was 757 (34.37%) in a flock of 2,202 chicks. Better control of systemic fungal infections may be enhanced by early application of anti-fungal susceptibility test.

Modulation of blood redox status by the progression of induced apical periodontitis in rats.

This study aimed to investigate if apical periodontitis in different periods changes systemic levels of the antioxidant and pro-oxidant parameters in Wistar rats. Twenty-four rats were randomly allocated into healthy animals, apical periodontitis at 14days (AP14) and apical periodontitis at 28days (AP28). The first mandibular molars were accessed in the AP groups, and the pulp chamber was exposed to the oral environment, inducing the apical lesion. After 14 and 28days, the animals were anesthetized, euthanized, and hemimandibles were collected for micro-computed tomography (micro-CT) analysis to measure lesion volume, bone volume (BV), percent of bone to total tissue volume (BV/TV), trabecular thickness (Tb.Th), trabecular number (Tb.N), and trabecular space (Tb.Sp). A histological examination of the remaining bone was also performed. Finally, blood samples were collected for oxidative biochemistry analysis, investigating glutathione (GSH), Trolox equivalent antioxidant capacity (TEAC), and lipid peroxidation (TBARS). The lesion volume was greater at 28 than at 14days, as shown by micro-CT. AP14 and AP28 had decreased BV and Tb.Th, but only AP28 showed a reduction in BV/TV. Tb.N and Tb. Sp were increased in apical periodontitis at 28 days. In the histopathological analysis, AP14 had focal regions of moderate mononuclear inflammatory infiltrate, and AP28 had an intense inflammatory infiltrate with bacterial colonies. In the biochemical evaluation, GSH, TEAC, and TBARS were increased after 14 days. However, GSH returned to control levels, TEAC was similar to AP14, and TBARS increased significantly after 28days. Therefore, the oxidative biochemistry response was modulated according to the progression of periapical damage. After 14days, the organism could still react to the injury. However, at 28days, the antioxidant response decreased, associated with an increase in TBARS.

STRUCTURAL REACTIONS OF CD-1 MICE HEART AND LIVER TO A SINGLE INJECTION OF BOROCAPTATE SODIUM

Boron neutron capture therapy is considered a promising method for the treatment of malignant tumors of the head and neck. It is believed that to increase the effectiveness of this type of therapy, the use of large doses of boron is required, which may entail damaging effects on healthy tissue. One of the substances used in the clinical practice of boron neutron capture therapy is sodium boroncaptate Na2B12H11SH (BSH), enriched with the 10B boron isotope. The purpose of the study was to study the structural reactions of the myocardium and liver of CD-1 mice after administration of BSH. A light-optical and polarization-microscopic study of the myocardium and liver of male CD-1 mice (n=56) was carried out after injection of a boron-containing substance in doses of 100 and 1000 mg/kg, once, intraperitoneally. Assessment of structural changes in the myocardium and liver was carried out 1, 3 and 7 days after BSH administration. A single injection of BSH at a dose of 100 mg/kg did not lead to the death of animals, whereas 3 hours after the injection of BSH at a dose of 1000 mg/kg, 1 animal died. The body weight of the animals changed slightly during the experiment. Analysis of heart weight showed a decrease in this indicator on days 3 and 7 compared with indicators in the same groups on day 1 of the experiment. When analyzing the dynamics of changes in liver mass, no significant changes were revealed during the experiment. The main structural changes in the myocardium included lytic and contractural damage to cardiomyocytes, hemodynamic disturbances in the form of pronounced venous and capillary congestion. Liver damage was manifested in dystrophic changes in hepatocytes, the appearance after 3 days of monocellular necrosis of hepatocytes and pericentral mononuclear infiltrates. The data obtained indicate that the used doses of BSH 100 and 1000 mg/kg with a single injection cause structural changes in the myocardium and liver of varying severity, which persist for 7 days of observation.

RADIATIONINDUCED CENTRAL DEMYELINATING LEUKOENCEPHALOPATHY

Background. Great improvement in survival has resulted from the contemporary treatment of cancer.However, this has been associated with the appearance of various previously unobserved neurological complications that have recently been reviewed.That radiotherapy is responsible is suggested by many features.Leukoencephalopathy appears after a quite regular delay following irradiation.They electively involve the endothelial cells with a break down of the blood-brain barrier, fibrinoid necrosis, perivascular exudation and mononuclear infiltration leading to foci of myelin destruction of different ages. Case. A 63 year old male patient was diagnosed with metastatic small cell lung cancer 20 months ago, and cisplatin+vepesid chemotherapy is started.At the 6th month of the treatment, prophylactic intracranial radiotherapy is given 3 times with an interval of 2 months. After the treatment,he had oversleeping,sluggishness, and epileptic seizures.Diffuse T2 hyperintensities were observed in the Cranial MRG taken.There was no pathology to explain the situation in the blood tests of the patient with diffuse slowing in his EEG.The patient was started on antiepileptic and steroid treatment and was followed up. Conclusion. Clinically there is progressive psychomotor deterioration.Convulsions are very rare and were seen in our patient.The MRG pattern was also very characteristic in our case especially affecting the white matter.In our case,the striking white matter predominance of the lesions was clearly shown in the pons where circumscribed areas of demyelination affected the ponto-cerebellar fibres whereas the neurons of the pontine nuclei were spared.That radiotherapy is responsible is suggested by many features.As in the cases of De Vivo et al,Rosemberg and Bleyer and Griffin,leukoencephalopathy appears after a quite regular delay following irradiation.The lesions are limited to the irradiated brain and spare the unirradiated spinal cord.The frequency of leukoencephalopathy increases with increasing doses of irradiation.This case suggests Demyelinating Leukoencephalopathy with clinical and radiological findings, biopsy is required for definitive diagnosis.

The Effect of Covid-19 on the Respiratory System

This study aims to assess the risk factors associated with COVID-19 patients at the General Basrah Hospital from June to October 2020. Since COVID-19 is related to acute respiratory distress syndrome, very few interstitial mononuclear inflammatory infiltrates were detected within the heart tissue samples during the research period [3]. The results of the study demonstrate that COVID-19 infections were more common in patients with cardiovascular diseases and acute respiratory. People aged >51 years showed a higher COVID-19 infection rate. Conclusions: The study demonstrates that COVID-19 infection rates were higher in patients with cardiovascular and acute respiratory diseases. Covid 19 posed a similar risk to males and women.

Protective properties of AgNPs green-synthesized by Camellia sinensis on ovalbumin-induced allergic conjunctivitis

Allergic conjunctivitis is the main usual red eye cause influencing many people. Allergic conjunctivitis is like an umbrella that includes different types of clinical manifestations, from a mild but annoying form of IgE-dependent allergy to inhaled allergens to very severe forms such as keratoconjunctivitis. Cornea involvement in allergic conjunctivitis needs the steroids use, which can cause severe eye complications. Research on allergic conjunctivitis should focus more on more severe forms of eye allergies to gain a better the pathophysiology understanding of the disease, diagnosis methods should be standardized and new treatment methods should be suggested. In the recent study, due to high therapeutic effects of Camellia sinensis, we used its aqueous extract for green-synthesizing of the silver nanoparticles and allergic conjunctivitis treatment in the in vivo condition. UV–Vis spectroscopy, FE-SEM and TEM were used for characterization of nanoparticles. This research therefore evaluated the AgNPs@Camellia sinensis antiallergic potential in ovalbumin-induced allergic conjunctivitis and attempted to predict its mode of action. ELISA determined serum ovalbumin-specific total IgE, IgE and IgG. Clinical scores for allergic conjunctivitis induced by intraperitoneal ovalbumin sensitization and topical conjunctival challenge in Dunkin-Hartley guinea pigs were estimated after treatment with 10, 20, 40 and 80 µg kg−1 AgNPs@Camellia sinensis, 10 mg kg−1 chlorpheniramine, 30 mg kg−1 prednisolone, or 10 mL kg−1 PBS. Serum ovalbumin-specific total IgE, IgE and IgG decreased significantly (p < 0.01). The conjunctival tissue in AgNPs@Camellia sinensis treated guinea pigs had mild mononuclear infiltration compared to the PBS-treated ones, which had intense conjunctival tissue inflammatory infiltration. The 40 and 80 mg kg−1 AgNPs@Camellia sinensis treatment resulted in allergic conjunctivitis low clinical score.

MIF is a critical regulator of mononuclear phagocytic infiltration in hepatocellular carcinoma

Immunotherapy targeting tumor-associated macrophages (TAMs) is a promising approach to treating cancer. However, the limited drug targets and ambiguous mechanisms impede the development of clinical immunotherapy strategies. To elucidate the underlying processes involved in mononuclear phagocyte (MNP) infiltration and phenotypic changes in hepatocellular carcinoma (HCC), we integrated single-cell RNA-sequencing data from 100,030 cells derived from patients with HCC and healthy individuals and compared the phenotypes and origins of the MNPs in the tumor core, tumor periphery, adjacent normal tissue, and healthy liver samples. Using machine learning and multi-omics analyses, we identified 445 infiltration-associated genes and potential drug targets affecting this process. Through invitro experiments, we found that the expression of macrophage migration inhibitory factor (MIF) is the upstream regulator of secreted phosphoprotein 1 (SPP1) and promote migration in TAMs. Our findings also indicate that MIF promotes tumor metastasis and invasion and is a promising potential target for treating HCC.

Formulation of a drug for the treatment of allergic conjunctivitis: Copper nanoparticles containing Olea europaea leaf aqueous extract

Olea europaea or Olive is the main ingredient of the Mediterranean diet. They are associated with many health benefits, especially for heart health and cancer prevention. Olive is rich in antioxidants and its health benefits range from fighting inflammation to reducing the growth of microorganisms. Recently, metallic nanoparticles green-formulated by ethnomedicinal plants have been used due to the antioxidant and anti-inflammatory potentials. Present research discloses the CuNPs biosynthesizing capability of the leaves of pharmacologically important Olea europaea. In addition, we investigated the Olea europaea green-formulated copper nanoparticles for the treatment of ovalbumin-induced allergic conjunctivitis. For determining the physicochemical properties of the recent nanoparticles, FT-IR, FE-SEM, UV-Vis and TEM were used. ELISA test was applied to measure the serum ovalbumin-specific IgG and IgE and total IgE. Clinical scores for allergic conjunctivitis induced by intraperitoneal ovalbumin sensitization and topical conjunctival challenge in guinea pigs were determined after a week’s daily treatment with 30 mg kg−1 prednisolone, 10 mg kg−1 chlorpheniramine, 2, 4, 8 and 16 µg kg−1 copper nanoparticles, or 10 mL kg−1 PBS. Ovalbumin-specific IgG and IgE as well as total serum IgE also decreased significantly (p<0.01). All doses of copper nanoparticles treatment resulted in a significantly (p<0.01) low clinical score of allergic conjunctivitis. The conjunctival tissue in copper nanoparticles treated guinea pigs had mild mononuclear infiltration compared to the PBS-treated ones, which had intense conjunctival tissue inflammatory infiltration.

Liver immunopathogenesis in fatal cases of dengue in children: detection of viral antigen, cytokine profile and inflammatory mediators.

Dengue virus (DENV), the etiologic agent of dengue fever illness, represents a global public health concern, mainly in tropical and subtropical areas across the globe. It is well known that this acute viral disease can progress to severe hemorrhagic stages in some individuals, however, the immunopathogenic basis of the development of more severe forms by these patients is yet to be fully understood. In this context, we investigated and characterized the histopathological features as well as the cytokine profile and cell subpopulations present in liver tissues from three fatal cases of DENV in children. Hematoxylin and Eosin, Periodic Acid Schiff and Picro Sirius Red staining were utilized for the histopathological analysis. Immunohistochemistry assay was performed to characterize the inflammatory response and cell expression patterns. Vascular dysfunctions such as hemorrhage, vascular congestion and edema associated with a mononuclear infiltrate were observedin all three cases. Liver tissues exhibited increased presence of CD68+ and TCD8+ cells as well as high expression of MMP-9, TNF-a, RANTES, VEGFR-2 mediators. Viral replication was confirmed by the detection of NS3 protein. Taken together, these results evidenced key factors that may be involved in the development of severe alterations in liver tissues of children in response to DENV infection.

CLINICAL AND HISTOPATHOLOGICAL FEATURES OF ORAL COMPLICATIONS AFTER INJECTABLE DERMAL FILLER: A CASE REPORT

A 55-year-old female patient that sought the stomatology clinic complaining of a nodule that appeared near the lower gum about one month ago. The patient reported that after compressing the nodule, a visible pink mass appeared on the oral mucosa near the lower gingiva. During anamnesis, the patient reported that she had undergone facial dermal filling with hydroxyapatite microspheres about one year ago. On physical examination, a well-delimited, irregularly shaped, solid-consistent, pinkish-yellowish mass was observed, covered by intact mucosa, measuring approximately 8 × 12mm. The main diagnostic hypothesis was foreign body reaction to filling material. During an incisional biopsy, it was observed that the material had a rubbery consistency and was adhered to the mucosa and underlying muscle tissue. Anatomopathological examination revealed rounded structures containing granular material surrounded by mononuclear inflammatory infiltrate and foreign body-type giant cells. The diagnosis was foreign body granuloma. Patient remains under clinical follow-up. A 55-year-old female patient that sought the stomatology clinic complaining of a nodule that appeared near the lower gum about one month ago. The patient reported that after compressing the nodule, a visible pink mass appeared on the oral mucosa near the lower gingiva. During anamnesis, the patient reported that she had undergone facial dermal filling with hydroxyapatite microspheres about one year ago. On physical examination, a well-delimited, irregularly shaped, solid-consistent, pinkish-yellowish mass was observed, covered by intact mucosa, measuring approximately 8 × 12mm. The main diagnostic hypothesis was foreign body reaction to filling material. During an incisional biopsy, it was observed that the material had a rubbery consistency and was adhered to the mucosa and underlying muscle tissue. Anatomopathological examination revealed rounded structures containing granular material surrounded by mononuclear inflammatory infiltrate and foreign body-type giant cells. The diagnosis was foreign body granuloma. Patient remains under clinical follow-up.

SHOCK4: Utilizing Mechanical Circulatory Support and Immunomodulation for the Management of Fulminant Lymphocytic Myocarditis: Case Series

Purpose: Five consecutive patients with biopsy-proven lymphocytic myocarditis (LM) presented to our medical center with cardiogenic shock (CS) requiring Mechanical Circulatory Support (MCS) and Immunomodulatory therapy. We present our experience and highlight the variability of presentation and management strategies. Methods: Five consecutive patients presented to our center between 3/1/2022 and 12/1/2022 with acute onset ventricular dysfunction and CS (Table). One had an out-of-hospital cardiac arrest. Due to the fulminant presentation and lack of typical risk factors, there was high clinical suspicion for myocarditis. One patient had positive influenza A testing. Results: All patients were managed acutely with VA-ECMO with or without left ventricular ventilation. All patients underwent an endomyocardial biopsy which showed virus-negative LM. Immunomodulatory therapy strategies varied among patients. Our initial approach was Methylprednisolone for 3 days and IVIG for all. Moreover, for those with a slower rate of recovery, or continued high inflammatory markers, plasmapharesis was utilized in addition to prolonged prednisone and/or azathioprine courses (Table). Of the five subjects, two had myocardial recovery, one developed chronic myocarditis, one developed chronic heart failure, and one required a durable LVAD. Conclusion: Lymphocytic myocarditis is a rare inflammatory disorder of the heart characterized by mononuclear cellular infiltrate and ventricular dysfunction. Fulminant myocarditis is characterized by CS or cardiac arrest. Prompt diagnosis is critical because the prognosis and recovery are better than with nonspecific histological findings or giant cell myocarditis (1,2). Our series and others have demonstrated MCS key role in decreasing mortality while treating the myocardial consequences of inflammatory injury (5-7). While viral infections are the most common cause found in 30-40% of cases (1,3,4), only one patient in our series had an influenza A infection, and none had positive viral testing on the biopsy. We found no consistent history of COVID-19 infection or vaccination among the patients. There is no consensus on the best strategy for immunomodulatory therapy, and more extensive studies with long-term outcomes are needed.

Preclinical safety and biodistribution assessment of Ad-KCNH2-G628S administered via atrial painting in New Zealand white rabbits.

Post-operative atrial fibrillation (POAF) is the most common complication after cardiac surgery. Despite implementation of several pharmacological strategies, incidence of POAF remains at approximately 30%. An adenovirus vector encoding KCNH2-G628S has proven efficacious in a porcine model of AF. In this preclinical study, 1.5 × 1010 or 1.5 × 1012 Ad-KCNH2-G628S vector particles (vp) were applied to the atrial epicardium or 1.5 × 1012 vp were applied to the whole epicardial surface of New Zealand White rabbits. Saline and vector vehicle served as procedure controls. Animals were followed for up to 42 days. Vector genomes persisted in the atria up to 42 days, with no distribution to extra-thoracic organs. There were no adverse effects attributable to test article on standard toxicological endpoints or on blood pressure, left atrial or ventricular ejection fractions, electrocardiographic parameters, or serum IL-6 or troponin concentrations. Mononuclear infiltration of the myocardium of the atrial free walls of low-dose, but not high-dose animals was observed at 7 and 21 days, but these changes did not persist or affect cardiac function. After scaling for heart size, results indicate the test article is safe at doses up to 25 times the maximum proposed for the human clinical trial.

Leucoderma in Buffaloes (Bubalus bubalis) in the Amazon Biome.

Leucoderma is a condition that affects the skin and hair of animals, causing depigmentation and acromotrichia. In buffaloes, this condition results in significant economic losses for the production chain due to its impact on the leather trade. This study aimed to investigate the epidemiological and clinicopathological aspects of leucoderma in buffaloes in the Amazon biome and describe the prophylactic treatment to control the disease. The study included 40 buffaloes, 16 males and 24 females, aged between 1 and 10 years, and were of the Murrah, Jafarabadi, Mediterranean, and Murrah × Mediterranean crossbreed breeds. The animals were raised without mineral supplementation. The clinical signs observed in the animals included acromotrichia and depigmentation, with varying degrees and distribution of skin lesions. Histological examination of the epidermis showed interrupted melanin production, mild dermal fibrosis, mild perivascular mononuclear inflammatory infiltrate, and pigmentary incontinence. None of the animals had the genotype for albinism. After 120 days of mineral supplementation based on the use of copper sulfate, the clinical signs of leucoderma regressed. There was no predisposition by breed, sex, or age for the occurrence of the disease. The regression of skin lesions after proper mineral supplementation suggests that copper deficiency may be considered an important factor for the occurrence of leucoderma in buffaloes in the Amazon biome.

Green formulation and characterization of Camellia azalea synthesized copper nanoparticles and its application in the treatment of ovalbumin-induced allergic conjunctivitis

Camellia azalea can treat many stubborn and malignant diseases, according to traditional Chinese medicine. In addition, it has been indicated that copper nanoparticles containing the plant have many therapeutic effects. Recently, metallic nanoparticles have been used due to the antioxidant and anti-inflammatory potentials. Present research discloses the CuNPs biosynthesizing capability of the leaves of pharmacologically important Camellia azalea. For determining the physicochemical properties of the recent nanoparticles, FE-SEM, FT-IR, TEM and UV-Vis were used. This study therefore assessed the antiallergic potential of copper nanoparticles in ovalbumin-induced allergic conjunctivitis and attempted to predict its action mode. ELISA test was applied to measure the serum ovalbumin-specific IgG and IgE and total IgE. Clinical scores for allergic conjunctivitis induced by intraperitoneal ovalbumin sensitization and topical conjunctival challenge in Dunkin-Hartley guinea pigs were determined after a week’s daily treatment with 10 mg kg−1 chlorpheniramine, 30 mg kg−1 prednisolone, 15 and 80 µg kg−1 copper nanoparticles, or 10 mL kg−1 PBS. The 15 and 60 mg kg−1 copper nanoparticles treatment resulted in a significantly (p < 0.01) low clinical score of allergic conjunctivitis. Ovalbumin-specific IgG and IgE as well as total serum IgE also decreased significantly (p < 0.01). The conjunctival tissue in copper nanoparticles treated guinea pigs had mild mononuclear infiltration compared to the PBS-treated ones, which had intense conjunctival tissue inflammatory infiltration.

Piscine Orthoreovirus-1 (PRV-1) Has Been Present in Chilean Salmon Aquaculture since at Least 1994

Heart and skeletal muscle inflammation (HSMI) caused by Piscine orthoreovirus (PRV) was first described in farmed Atlantic salmon in Chile in 2011. However, as PRV induces long-lasting infections, it is not known when Chilean farmed salmon may have started to show PRV positivity. This study aimed to evaluate the presence/absence of PRV-1 in formalin-fixed, paraffin-embedded Atlantic salmon heart tissues (FFPE) cultured in Chile during 1992 and 1999. The most frequent histopathological findings in the 42 FFPE blocks were mild focal cardiomyocyte degeneration (57.1%) and a mild focal mononuclear inflammatory infiltrate (21.4%) in the ventricular stratum spongiosum of the heart. One of the 42 heart samples analyzed by RT-qPCR was positive for PRV-1 (2.4%). All samples were negative for other viral and bacterial pathogens that can induce similar histological changes in the heart. Taken together, our results show that PRV-1 has been present in Chile—as a low-virulence genogroup—since at least 1994, 17 years before the first HSMI outbreak in 2011. Finally, archaeovirology can be a valid alternative to contribute to the understanding of the epidemiology of diseases in aquaculture.

Histopathologic Study of Gastritis and Helicobacter Pylori Infection at a Tertiary Centre in Kathmandu

Introduction: Chronic gastritis is a chronic inflammation of the gastric mucosa characterized by infiltration of the superficial mucosa by chronic inflammatory cells and with progressive spread to involve the whole mucosa leading to atrophy and intestinal metaplasia and may even progress to the development of carcinoma. Chronic infection with Helicobacter pylori (H. Pylori) is believed to be the major causative agent in the pathogenesis of chronic active gastritis, duodenal and gastric ulcer along with gastric carcinoma. Sydney system classifies gastritis by the intensity of mononuclear inflammatory infiltrates, activity of polymorphs, atrophy, metaplasia and dysplasia and presence of H. pylori.&#x0D; Methods: Observational, descriptive, cross-sectional retrospective study conducted at Department of Pathology, Kathmandu Model Hospital, Kathmandu, Nepal from January 2015 to December 2015. Record of computerized histopathology reports of all cases of endoscopic gastric biopsies were retrieved from the laboratory. The biopsy samples obtained from both body and antrum were included in the study. The grades of mononuclear cells infiltration, neutrophilic activity, metaplasia, dysplasia and glandular atrophy were determined using the Sydney system classification. The presence or absence of H. pylori was noted in the slides stained with Giemsa stain. Data analysis was done using a Microsoft Excel file.&#x0D; Results: Of 128 samples studied, the most common endoscopic findings were erythematous lesions and mononuclear infiltrate was seen in all cases. 61.7% showed moderate inflammation. The activity was seen in 35.9% of cases. H. pylori organism was noted in 48.4% of cases.&#x0D; Conclusion: The severity of chronic inflammation and neutrophilic activity are significantly associated with infection by this microorganism.

Leishmania (L.) infantum chagasi isolated from skin lesions of patients affected by non-ulcerated cutaneous leishmaniasis lead to visceral lesion in hamsters.

In Central America, Leishmania (L.) infantum chagasi infection causes visceral leishmaniasis (VL) and non-ulcerated cutaneous leishmaniasis (NUCL). The aim of the present study was to evaluate the course of an experimental infection in hamsters caused by L. (L.) infantum chagasi isolated from patients affected by NUCL compared with a strain isolated from a patient with VL. Stationary phase parasites in culture were inoculated through subcutaneous and intraperitoneal routes in hamsters. Following the post-infection times, a histopathological study, parasite load and cytokine determination in skin from the cutaneous inoculation site and viscera were performed. Animals subcutaneously infected with the different strains did not develop macroscopic lesions at the inoculation site, and the histopathological changes in the dermis were very slight. Regarding the histopathological study of the viscera, we observed the portal mononuclear inflammatory infiltrate, the presence of nodules in the hepatic parenchyma and the proliferation of macrophages in the spleen, which increased over the infection course. Overall, the parasite load in the liver and spleen and in the total IgG titres in the sera of infected hamster showed an increase with the time of infection, regardless of the route of inoculation. Regarding cellular immunity, we did not observe an increase or decrease in pro- and anti-inflammatory cytokines compared to the healthy control, except for IL-10, which was evident in the infected animals. The data showed that strains isolated from NUCL cause visceral lesions in the hamsters regardless of the route of inoculation, and they were similar to parasites isolated from VL humans.