Proliferation Of Connective Tissue Research Articles

TUMORIGENESIS AND TUMOR MARKERS IN FISH: AN UPDATED REVIEW

Fish is the largest class of vertebrates. Neoplasia is a known disease in fishes which is not considered to be a deadly condition for few malignancies. Cancer is the unregulated cell proliferation with the ability to invade or metastasize to other parts of the body. The tumorigenic process is marked by a competition between cellular proliferation and apoptosis characterized by genetic mutations and increased connective tissue proliferation with associated impairment of the immune system. Tumor markers are molecules produced by tumor cells or other cells of the body in response to cancer or benign conditions and thus; are of diagnostic value. Most tumor markers are secreted into blood and are assayed in blood, urine or immuno-histochemically. Diagnosis of tumors in fish is not always easy to carry out, and the tool provided by antibodies used on mammalian tissue is essential for obtaining definitive, unambiguous, and inexpensive identification. Generally, teleosts resemble other vertebrates in their predisposition to neoplastic lesions, which been widely studied, characterized, and classified. Immunohistochemistry is an extremely useful technique for the diagnosis of neoplasms. This technology relies upon antibody-based stains specific for intermediate filaments or surface markers. This review discusses the currently available tumor markers for different neoplasms in fish as well as the mostly used tumor markers in diagnosis. The objective of this review also is to provide an overview of neoplasia and the various neoplastic disease conditions in fishes as well as the most common methods used in diagnosis of fish tumors including immunohistochemistry and tumor markers.

The novel subclusters based on cancer-associated fibroblast for pancreatic adenocarcinoma.

Pancreatic adenocarcinoma (PAAD) is a fatal disease characterized by promoting connective tissue proliferation in the stroma. Activated cancer-associated fibroblasts (CAFs) play a key role in fibrogenesis in PAAD. CAF-based tumor typing of PAAD has not been explored. We extracted single-cell sequence transcriptomic data from GSE154778 and CRA001160 datasets from Gene Expression Omnibus or Tumor Immune Single-cell Hub to collect CAFs in PAAD. On the basis of Seurat packages and new algorithms in machine learning, CAF-related subtypes and their top genes for PAAD were analyzed and visualized. We used CellChat package to perform cell-cell communication analysis. In addition, we carried out functional enrichment analysis based on clusterProfiler package. Finally, we explored the prognostic and immunotherapeutic value of these CAF-related subtypes for PAAD. CAFs were divided into five new subclusters (CAF-C0, CAF-C1, CAF-C2, CAF-C3, and CAF-C4) based on their marker genes. The five CAF subclusters exhibited distinct signaling patterns, immune status, metabolism features, and enrichment pathways and validated in the pan-cancer datasets. In addition, we found that both CAF-C2 and CAF-C4 subgroups were negatively correlated with prognosis. With their top genes of each subclusters, the sub-CAF2 had significantly relations to immunotherapy response in the patients with pan-cancer and immunotherapy. We explored the heterogeneity of five subclusters based on CAF in signaling patterns, immune status, metabolism features, enrichment pathways, and prognosis for PAAD.

DISRUPTION OF THE UROTHELIAL BARRIER UNDER BENIGN PROSTATIC HYPERPLASIA AS A COMPONENT OF BLADDER DECOMPENSATION

Introduction. The urothelial barrier resists the aggressive effect of urine on the bladder tissues. Chronic retention of urine causes the development of an infectious and non-infectious inflammatory process with metaplasia and desquamation of the urothelial layer of the bladder. With long-term infravesical obstruction, the contact density between urothelial cells is disturbed, which leads to the loss of the barrier function of the mucous membrane of the urinary bladder.
 The purpose of the study is to investigate the role of urothelial barrier disruption in the development of urinary bladder decompensation in patients with BPH.
 Materials and methods. 70 patients with BPH were selected, their average age was 67.94±7.42 years. They underwent a bladder biopsy during the operation, followed by a pathomorphological examination.
 According to clinical manifestations, patients were divided into three groups: group I included 20 patients with bladder compensation (I-PSS – 16±4.5, Qmax – 15.8±2.4 ml/s, Qave – 12.8±2.8 ml/s, without post void residual); group II involved 20 patients with bladder subcompensation (I-PSS – 26±3.9, Qmax – 10.8±2.5 ml/s, Qave – 4.4±1.4 ml/s, post void residual – 150.1 ±80.8 ml.); and III group included 30 patients with bladder decompensation (before the cystostomy I-PSS – 33.1±1.88, post void residual – 1093.3±458.8 ml).
 Results. In the compensation stage of the bladder there is found multilayer transitional cell urothelium that often forms folds, causing pseudoepithelial outgrowths. The detrusor is represented by hypertrophied smooth muscle cells, with the phenomena of moderate hydropic dystrophy in individual myocytes, with isolated small foci of sclerosis. In the stage of bladder subcompensation we observe foci of desquamation of the surface layers of the urothelium and dystrophic changes in epitheliocytes. Areas of atrophy are combined with foci of hyperplasia of epitheliocytes with stratification of the epithelium (up to 14 - 18 layers or more). The lamina propria of the mucous membrane is swollen in most cases, the formation of lacuniform slits is seen. There are often foci of lymphoplasmacytic infiltration. The detrusor is mostly represented by hypertrophied smooth muscle cells, a significant number of which have signs of hydropic dystrophy.
 In the stage of bladder decompensation the foci of total desquamation of all layers of the urothelium can be observed; pronounced dystrophic changes of epitheliocytes also take place. The own plate of the mucous membrane is sharply thickened: due to the formation of numerous lacuniform slits it has a porous appearance. Erosive changes in the mucous membrane of the urinary bladder are accompanied by pronounced sclerosis of the stroma. In places of desquamation of the urothelium, submucosal foci of sclerosis are observed, which penetrate into the detrusor. The latter is represented by hypotrophied smooth muscle cells with signs of hydropic dystrophy. Due to the massive proliferation of connective tissue, muscle fibres are divided into separate bundles. Diffuse lymphoplasmacytic infiltration is observed in all layers of the bladder.
 Conclusion: The results of pathomorphological studies in the context of clinical and functional characteristics enables to distinguish three stages of SM remodelling in BPH: compensation, subcompensation and decompensation. Long-term chronic retention of urine causes a violation of the urothelial barrier, urine impregnation of all layers of the CM with the development of aseptic inflammation. A progressive increase in the specific weight of connective tissue, dystrophic changes in myocytes and nerve fibres become the cause of decompensation of the CM with a violation of the contractile ability of the detrusor.

The condition of the erector spinae muscle in patients with chronic nonspecific low back pain

Myofascial pain syndrome caused by damage to the paravertebral muscles is considered as one of the causes of chronic back pain. At the same time, there is not enough information about the condition of the paravertebral muscles, and it is contradictory.The aim of the work is to elucidate the presence and severity of structural and functional changes in the paravertebral muscles and their role in the development of chronic nonspecific pain in the lower back in women.Material and methods. Morphological, immunohistochemical examination of a muscle tissue biopsy was performed in 17 patients aged 24 to 59 years (average age — 41.5 ± 12.1 years) with CNS (average duration of pain syndrome 10.0 ± 6.9 months) caused by myofascial pain syndrome, as well as determination by gel electrophoresis of the isoform composition of giant sarcomeric proteins titin and nebulin.Results. Morphological examination revealed no signs of necrosis, proliferation of connective and adipose tissue, inflammatory infiltration. The transformation of the myosin phenotype in the direction of an increase in the proportion of “fast” type II muscle fibers was revealed in the biopsies of the patients’ muscles. A decrease in the content of giant titin and nebulin proteins associated with myosin and actin in the sarcomere was also found.Conclusion. The data obtained indicate a violation of the contractile function of the paravertebral muscle in CNS.

Exercise builds the scaffold of life: muscle extracellular matrix biomarker responses to physical activity, inactivity, and aging.

Skeletal muscle extracellular matrix (ECM) is critical for muscle force production and the regulation of important physiological processes during growth, regeneration, and remodelling. ECM remodelling is a tightly orchestrated process, sensitive to multi-directional tensile and compressive stresses and damaging stimuli, and its assessment can convey important information on rehabilitation effectiveness, injury, and disease. Despite its profound importance, ECM biomarkers are underused in studies examining the effects of exercise, disuse, or aging on muscle function, growth, and structure. This review examines patterns of short- and long-term changes in the synthesis and concentrations of ECM markers in biofluids and tissues, which may be useful for describing the time course of ECM remodelling following physical activity and disuse. Forces imposed on the ECM during physical activity critically affect cell signalling while disuse causes non-optimal adaptations, including connective tissue proliferation. The goal of this review is to inform researchers, and rehabilitation, medical, and exercise practitioners better about the role of ECM biomarkers in research and clinical environments to accelerate the development of targeted physical activity treatments, improve ECM status assessment, and enhance function in aging, injury, and disease.

Differential expression patterns of genes associated with metabolisms, muscle growth and repair in Pectoralis major muscles of fast- and medium-growing chickens.

The aim of this study was to investigate the expression of genes related to muscle growth, hypoxia and oxidative stress responses, a multi-substrate serine/threonine-protein kinase (AMPK) and AMPK-related kinases, carbohydrate metabolism, satellite cells activities and fibro- adipogenic progenitors (FAPs) in fast-growing (FG) (n = 30) and medium-growing (MG) chickens (n = 30). Pectoralis major muscles were collected at 7d, 14d, 21d, 28d, 35d and 42d of age. According to their macroscopic features, the samples from FG up to 21d of age were classified as unaffected, while all samples collected at an older age exhibited macroscopic features ascribable to white striping and/or wooden breast abnormalities. In contrast, MG samples did not show any feature associated to muscle disorders. The absolute transcript abundance of 33 target genes was examined by droplet digital polymerase chain reaction. The results showed differential gene expression profiles between FG and MG chickens at different ages. While most genes remained unchanged in MG chickens, the expression patterns of several genes in FG were significantly affected by age. Genes encoding alpha 1, alpha 2, beta 2 and gamma 3 isoforms of AMPK, as well as AMPK-related kinases, were identified as differentially expressed between the two strains. The results support the hypothesis of oxidative stress-induced muscle damage with metabolic alterations in FG chickens. An increased expression of ANXA2, DES, LITAF, MMP14, MYF5 and TGFB1 was observed in FG strain. The results suggest the occurrence of dysregulation of FAP proliferation and differentiation occurring during muscle repair. FAPs could play an important role in defining the proliferation of connective tissue (fibrosis) and deposition of intermuscular adipose tissue which represents distinctive traits of muscle abnormalities. Overall, these findings demonstrate that dysregulated molecular processes associated with myopathic lesions in chickens are strongly influenced by growth rate, and, to some extent, by age.

The Effect of Mineralized Plasmatic Matrix and Chitosan on the Healing of Critical-Sized Mandibular Bone Defects in a Rabbit Model

Background: In maxillofacial surgery, critical size mandibular defects remain a challenging issue. There have been numerous attempts to improve mandibular defect healing. Recently, bone tissue engineering has provided many benefits in improving bone healing. Herein, we tried to investigate the effect of Mineralized plasmatic matrix (MPM) and Chitosan to enhance tissue healing and regeneration in mandibular bone defect. Methods: A mandibular bone defect of critical size was created in 45 New Zealand rabbits. There were three groups of rabbits: the MPM group, the Chitosan group, and the control group. Radiographical, histological, and immune histochemical evaluations were performed at 4, 8, and 12 post-operative weeks. Results: The MPM group demonstrated the highest degree of bone formation with uniform radio-opacity nearly like that of adjacent healthy parent tissue. While in the chitosan group, most of the defect area was filled with radio-opaque bone with persistent small radiolucent areas. The control group showed less bone formation than the MPM and chitosan group, with more radiolucent areas. Sections stained with (H&E) demonstrated an increase in osseous tissue formation in both the MPM and chitosan groups. Staining with Masson’s trichrome revealed an increase in fibrous connective tissue proliferation in both the MPM and chitosan groups. In both the MPM and chitosan groups, nuclear factor kappa p65 was downregulated, and matrix metalloproteinase-9 was upregulated. Conclusion: According to the current study, MPM and Chitosan may have beneficial effects on the healing of critical-sized mandibular bone defects.

Radiographic and Histological Evaluation in Canine Femur after Implantation of 304 Stainless-steel-based Plate

Fractures are known to be high-risk traumatic cases in domestic animals. Surgery was performed to reposition and immobilize bone using a plate as a biomaterial component. This study aimed to evaluate the radiographic and histological findings in canine femur after implantation of a 304 stainless-steel-based plate. A total of six male dogs aged 3-4 months were used in this study. Dogs were acclimatized for a week and then randomly assigned to 2 groups and 3 replication, respectively. The left femoral diaphysis was cracked and fixed by (A) commercial plate; (B) 304 stainless-steel plate. Radiographic observations were performed at 24 h and 28 d postoperatively during the recovery period. Histological figures were evaluated at 28 d postoperative descriptively. As a result, physical examination of muscle tissue in both groups did not reveal discoloration, swelling, and fluid accumulation around the plate. The radiographic figures presented a slight callus production around the crack and a decrease in the gap between cracks after 28 d. The histological figures observed the proliferation of osteoblasts, osteocytes, connective tissues, and bone trabeculae. It can be concluded that no significant difference between 304 stainlesssteel plate compared to commercial plate. A 304 stainless-steel-based plate is recommended for bone immobilization in canine femoral fractures.

In Vitro and In Vivo Investigation on the Effectiveness of Alginate-Based Gastric Mucosal Protective Gel.

Objective To investigate the feasibility and effectiveness of an alginate-based gastric mucosal protective gel on the gastric ulcer. Methods (1) In the physical protection model, after GES-1 cell attachment add the gel to transwell chamber, add different concentrations of HCl to the gel. Absorbance was measured to assess proliferation and images of the cells migrating into the wound were taken; then the migration rate of the cells was quantified by comparing images. (2) In the gastric ulcer model, excise the gastric mucosal of SD rats; the gel and fixative were applied on the artificial ulcer immediately. Dissect rats after 10 days, and calculate the wound healing rate and analyzed histology changes. Results The effect of hydrochloric acid on cells in the lower layer was significantly reduced after the use of gastric mucosal protection gel. The protective gel had an isolation effect on different concentrations of acid. A number of GES-1 were significantly higher than those in the control group at 24 h to 72 h (P < 0.01). The migration was observed compared with the control group. The average healing rate of ulcer in the gel group was about 50%, and the control group was about 30%. Inflammation occurred in all wound regions after ten days. In the gel group, inflammatory infiltration depth was lower than that of the control, and part of SD rats' new muscle layer appeared without inflammatory infiltration. The connective tissue proliferation promoted tissue repair. In the control group, necrosis marginal, mucosal hyperplasia, marginal lymphocyte aggregation, and bleeding were observed. Conclusion This novel gel mainly has an isolating and shielding effect to prevent the wound from being exposed to gastric acid for a long time, and it can reduce the inflammatory reaction on the wounds to promote the healing of the ulcer. The gastric mucosal protective gel cannot only promote the speed of wound healing but also improve the quality of wound healing.

Histopathological diagnostics of arthrofibrosis

Joint surgery is one of the most important and successful disciplines in surgery; nevertheless, complications still occur, especially in total knee arthroplasty and surgery of the anterior cruciate ligament. A significant disease in this context is arthrofibrosis. This review article presents the cellular and molecular pathogenetic concept of arthrofibrosis, the spectrum of histopathological diagnostics and differential diagnostics and a classification into joint endoprosthesis-associated and non-joint endoprosthesis-associated arthrofibrosis is proposed. The basis of the histopathological diagnostics is the standardized tissue removal with subsequent fixation in formalin. In the case of joint implant failure and the problem of endoprosthesis-associated arthrofibrosis, the histopathological diagnostics can be carried out according to the consensus classification of synovia-like interface membrane (SLIM). Arthrofibrosis is characterized by fibrosis, a high fibroblast cellularity with immunohistochemical detection of cytoplasmic beta catenin expression. The presence of endoprosthesis-associated arthrofibrosis is probable above a threshold of 20 beta catenin positive fibroblasts per high-power field (HPF). The diagnosis of a non-endoprosthesis-associated arthrofibrosis can be classified according to the joint pathology algorithm. Diffuse non-endoprosthesis-associated arthrofibrosis is characterized by generalized proliferation of connective tissue in the whole joint and localized circumscribed arthrofibrosis is characterized by a nodose cyclops-like fibrosis. The clarification of the cause of arthrofibrosis is based on an interdisciplinary cooperation. In addition to the histopathological diagnostics, this includes clinical, surgical, biomechanical, arthroscopic, microbiological, laboratory parameter and radiological findings.

Studies on the ethnopharmacology, antimicrobial activity, and toxicity of Catha edulis (Vahl.) Endl., in Sprague Dawley rats.

Background: The Mbeere South community of Embu County consume leaves of Catha edulis for its stimulant and euphoretic actions. Other indigenous uses of the plant are undocumented. Information on the pharmacology and safety of this plant is also scanty. This study aimed to document the ethnopharmacology, antimicrobial properties, and toxicity of C. edulis leaves collected from the Mbeere South community in Kenya. Methods: Ethnopharmacological data was collected from 35 informants using semi-structured questionnaires. Leaf extracts of C. edulis were prepared using acetone, water, and methanol. The antimicrobial properties of these extracts were evaluated against Bacillus cereus, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Candida albicans. The toxicity of the aqueous extract was determined using hematological, biochemical, and histopathological parameters in male and female Sprague Dawley rats at 250 mg/kg, 500 mg/kg, and 1000 mg/kg doses over 28 days. p<0.05 was considered significant. Results: All informants were male, most were married, >50 years old, with >10 years of experience. The sources, local names, preparation, storage conditions, indications, frequency of use, dosage, and side effects of C. edulis were documented. All extracts were ineffective against E. coli, P. aeruginosa, and C. albicans. They had limited efficacy against B. cereus and S. aureus. Significant differences were observed in the hematological and biochemical parameters of rats at the tested doses. Low, intermediate, and high doses of the aqueous extract of C. edulis produced local congestion of the cardiac and hepatic vessels. Localized interstitial connective tissue proliferation, multifocal kidney interstitial hemorrhage, and localized tubular epithelium necrosis were also observed in female rats. Conclusions: The ethnobotanical uses of C. edulis among the Mbeere South community were documented for the first time. Limited antimicrobial efficacy and toxicity at high doses limit the use of leaves of C. edulis.

Morphological signs of the prophylactic effect of 1,3-diethylbenzimidazolium triiodide on the ectopic growth of sarcoma 45 in the lung

Purpose of the study. An analysis of morphological features of the lung sarcoma 45 ectopic growth in rats of different sexes in course of experimental therapy with 1,3‑diethylbenzimidazolium triiodide.Materials and methods. Studies were carried out on 60 white nonlinear female and male rats weighing 180–220 g with transfusion of sarcoma cells 45 suspension from the subclavian vein into the lung, which resulted in subsequent ectopic tumor growth. At the same time, per os, 0.5 ml of an aqueous solution of 1,3‑diethylbenzimidazolium triiodide in a single dose of 0.4 mg/kg was administered. Morphological control of the lung tumor growth was carried out in stages, weeks 1 through 8, while assessing visual changes with Axiovert microscope (Carl 44 Zeiss, Germany) as well as with Axiovision 4 image visualization program (Carl Zeiss, Germany).Results. It was found out that, instead of the initial acute phase of blood flow reduction due to introduction of tumor cells resulting in neoplastic growth, activation of the immunity cellular link occurred under the influence of 1,3‑diethylbenzimidazolium triiodide along with a compensatory increase in bronchoalveolar structures, regression of tumor nodes and proliferation of connective tissue. At the same time, in females, a more rapid restructuring of the protective cellular systems of the lung occurs, and tumor regression is observed.Conclusion. The morphological manifestations of triiodide indicate the antitumor effect of 1,3‑diethylbenzimidazolium on the possibility of inhibiting lung sarcoma 45 ectopic growth and demonstrate a high reactivity of female rats to the damaging effect of the tumor and the rate of disturbed pulmonary structures compensation.

ORAL HIV-ASSOCIATED KAPOSI'S SARCOMA WITH ATYPICAL CLINICAL PRESENTATION: REPORT OF A CASE

Kaposi's sarcoma is a multifocal angioproliferative malignant neoplasm caused by human herpesvirus 8 (HHV-8) and commonly associated with acquired immunodeficiency syndrome (AIDS). A 25-year-old male patient recently diagnosed with AIDS was referred for consultation reporting multiple intraoral lesions with 2 months of evolution. Physical examination revealed diffuse multinodular purplish-red lesions of fibroelastic consistency, associated with spontaneous bleeding, affecting the whole maxillary and mandibular keratinized mucosa. Incisional biopsy was performed. Histopathologic examination revealed a mucosal fragment covered by stratified squamous epithelium exhibiting a large amount of blood vessels in the connective tissue and vascular proliferation associated with a large number of spindle-shaped neoplastic cells and red blood cell extravasation. Immunohistochemistry for HHV-8 was positive, confirming the diagnosis of Kaposi's sarcoma. After 3 months of systemic chemotherapy with liposomal doxorubicin the patient showed improvement of the oral lesions.

LB1006 Primary radiotherapy for the treatment of keloids: Pilot study preliminary results

Introduction:Keloids are a benign excessive proliferation of connective tissue, with associated pruritus, pain, and appearance that can be distressing to patients. Post-excision radiation therapy (RT) can decrease keloid recurrence with excellent cosmetic results, few long-term toxicities, and no RT-attributable cancers. When surgical excision is not feasible, RT monotherapy may be a successful alternative. However, lack of standardization of an RT-only protocol has precluded wide implementation.

Eosinophilic Granulomatous Myocarditis in Two Pigs

Eosinophilic myocarditis is a human condition that has been rarely documented in animals. We now report two unrelated porcine cases of idiopathic eosinophilic granulomatous myocarditis that resembled the human disease and which were associated with sudden death. The most relevant gross finding in both cases was marked cardiomegaly, accompanied by raised, multifocal to coalescent small white nodules (1-2mm) and poorly demarcated multifocal pale areas in the epicardium. Histologically, there were multifocal to coalescent areas of cardiomyocyte loss with replacement by an intense inflammatory infiltrate of eosinophils and epithelioid macrophages, and proliferation of fibrous connective tissue. Immunohistochemistry for porcine circovirus type 2 (PCV2) and Toxoplasma gondii, in-situhybridization and quantitative polymerase chain reaction tests for PCV2 and porcine circovirus type 3 and aerobic bacterial culture on myocardium samples were negative.

The Role of Vascular-Platelet Hemostasis Disturbances in the Genesis of Respiratory Failure in Patients with COVID-19

The objective: to study the relationship between markers of imbalance in the platelet-vascular hemostasis system and lung damage and disease outcome in patients with COVID-19.Subjects and Methods: the study included 225 patients with the confirmed diagnosis of moderate, severe and extremely severe COVID-19. In all patients, lung damage was confirmed using computed and X-ray diagnostic methods. We studied the concentration of von Willebrand factor (vWF), activity of metalloproteinase ADAMTS-13, concentration of homocysteine, endothelin-1, thrombomodulin and the number of platelets and changes in these parameters on the 1st, 3–5th and 7–10th days from the admission to the intensive care unit (ICU). In deceased patients (n = 106), lung specimens were collected to assess the nature of morphological changes.Results. It was determined that by the 7–10th days with a lethal outcome of the disease, there was a statistically significant increase in the concentration of vWF by 22.2% (p = 0.0225), the vWF/ADAMTS-13 ratio by 2 times (p = 0.0408) and decrease in the platelet count by 52% (p = 0.0008) versus the initial stage of the study. In all the deceased, the morphological picture of lung tissue damage was characterized by destruction of alveolocytes, proliferation of connective tissue, cellular infiltration, plethora of capillaries, parietal erythrocyte thrombi in the lumen of capillaries, arterioles and venules, and obstructive erythrocyte thrombi in the lumen of vessels of lung microcirculation.Conclusion. The study showed that a possible cause of thrombosis in the lumen of vessels of lung microcirculation in the case of a lethal outcome of COVID-19 might be a primary imbalance in the vascular-platelet hemostasis characterized by a significant increase in the concentration of the vWF factor, the vWF/ADAMTS-13 ratio and a decrease in the number (consumption) of platelets by the 7–10th day of the disease versus the initial stage of the study.

Oral Fibrosarcoma in Dog: Cytological, Histopathological and Immunohistochemical Diagnosis

Background: Canine oral fibrosarcomas are locally invasive malignant mesenchymal tumors and the third most frequently occurring neoplasia of oral cavity of dogs. The present study was conducted to record pathological features of oral fibrosarcomas in canines. Methods: During the study period (September 2020- April 2021), a total of 18 cases of canine oral neoplasia were reported and amongst these fibrosarcoma was diagnosed in five animals (27.78%). The blood samples were collected from all the dogs and the excised tumor mass was processed at Department of Veterinary Pathology, Co.V.Sc. and A.H., Jabalpur. Result: The hematological profile of all the five dogs showed no variation however; serum biochemical analysis revealed hypercalcemia. The serum MDA concentration was elevated in dogs with fibrosarcoma, indicating oxidative stress. The gross morphology of the tumors included red to pink colored irregular masses, hard in consistency and firmly attached to the underlying tissue. Cytologically, the impression smears revealed spindle shaped cells with round to elongated nuclei along with strands of collagen fibres. Upon histopathological examination proliferation of fibrous connective tissue was observed in the sub-mucosa. Higher magnification revealed several immature spindle shaped fibroblasts along with scanty amounts of collagenous matrix. Masson’s trichome staining also exhibited blue stained collagen deposition. Mitotic figures were numerous (8.4 mitosis/10 hpf). The tissue sections stained by modified silver colloid staining were examined at 1000 x magnification. Mean Ag-NOR count of the silver nitrate stained tissue sections was enumerated to be 9.15 dots/nucleus. Immunohistochemical examination detected CD31 immunopositivity in the tissue sections as brown staining of the infiltrating blood vessels, indicating neovascularization of the tumor.

Disparities in transvenous lead extraction in young adults

Adults with cardiac implantable electronic devices (CIEDs) implanted at an early age constitute a specific group of patients undergoing transvenous lead extraction (TLE). The aim of this study is to assess safety and effectiveness of TLE in young adults. A comparative analysis of two groups of patients undergoing transvenous lead extraction was performed: 126 adults who were 19–29 years old at their first CIED implantation (early adulthood) and 2659 adults who were > 40 years of age at first CIED implantation and < 80 years of age at the time of TLE (middle-age/older adulthood). CIED-dependent risk factors were more common in young adults, especially longer implant duration (169.7 vs. 94.0 months). Moreover younger age of patients at first implantation, regardless of the dwell lead time, is a factor contributing to the greater development of connective tissue proliferation on the leads (OR 2.587; p < 0.001) and adhesions of the leads with the heart structures (OR 3.322; p < 0.001), which translates into worse TLE results in this group of patients. The complexity of procedures and major complications were more common in younger group (7.1 vs. 2.0%; p < 0.001), including hemopericardium (4.8 vs 1.3; p = 0.006) and TLE-induced tricuspid valve damage (3.2 vs.0.3%; p < 0.001). Among middle-aged/older adults, there were 7 periprocedural deaths: 6 related to the TLE procedure and one associated with indications for lead removal. No fatal complications of TLE were reported in young adults despite the above-mentioned differences (periprocedural mortality rate was comparable in study groups 0.3% vs 0.0%; p = 0.739). Predictors of TLE-associated major complications and procedure complexity were more likely in young adults compared with patients aged > 40 to < 80 years. In younger aged patients prolonged extraction duration and higher procedure complexity were combined with a greater need for second line tools. Both major and minor complications were more frequent in young adults, with hemopericardium and tricuspid valve damage being predominant.

Subdermal Silicone and Collagen Injection Effect on the Skin of Rats (Rattus norvegicus) on the Third Day After Injection

Collagen and silicone are substances commonly used as dermal filler in a number of beauty procedures. However, sometimes these chemicals cause unwanted side effects on the skin. The purpose of this research is to analyse the effect of collagen and silicone subdermal injection on rat skin as a model for human skin. Materials in this research are 9 Wistar rats (Rattus norvegicus) divided into three groups with a number of 3 rats in each group. The first control group (K) is not given any injections, while KI and KII are injected with 0,1 ml collagen and 0,1 ml silicone respectively. On the third day, all groups are observed for macroscopic changes. Skin samples are taken by necropsy and are made into slides using HE stain. All procedures done are approved by the ethics commission of LLPT, UGM, Yogyakarta with the certificate number 00024/04/LPPT/V/2019. The slides are observed under a microscope with 20x and 40x magnification. Any microscopic changes are noted, also epidermis and dermis lengths are measured. Mild hyperkeratosis, inflammation and proliferation of connective tissue are found. The measurements of the epidermis and dermis are analysed using T-test independent method in the program Statistical Product and Service Solution (SPSS). The mean length of the epidermis is a little thicker than normal but is not significant (P&gt;0,05). The results of this research show that the subdermal injection of 0,1 ml collagen and 0,1 ml silicone on rats do not cause significant macroscopic or microscopic changes.

Studies on the ethnopharmacology, antimicrobial activity, and toxicity of Catha edulis (Vahl.) Endl., in Sprague Dawley rats

Background: The Mbeere South community of Embu County consume leaves of Catha edulis for its stimulant and euphoretic actions. Other indigenous uses of the plant are undocumented. Information on the pharmacology and safety of this plant is also scanty. This study aimed to document the ethnopharmacology, antimicrobial properties, and toxicity of C. edulis leaves collected from the Mbeere South community in Kenya. Methods: Ethnopharmacological data was collected from 35 informants using semi-structured questionnaires. Leaf extracts of C. edulis were prepared using acetone, water, and methanol. The antimicrobial properties of these extracts were evaluated against Bacillus cereus, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Candida albicans. The toxicity of the aqueous extract was determined using hematological, biochemical, and histopathological parameters in male and female Sprague Dawley rats at 250 mg/kg, 500 mg/kg, and 1000 mg/kg doses over 28 days. p&lt;0.05 was considered significant. Results: All informants were male, married, &gt;50 years old, with &gt;10 years of experience. The sources, local names, preparation, storage conditions, indications, frequency of use, dosage, and side effects of C. edulis were documented. All extracts were ineffective against E. coli, P. aeruginosa, and C. albicans. They had limited efficacy against B. cereus and S. aureus. Significant differences were observed in the hematological and biochemical parameters of rats at the tested doses. Low, intermediate, and high doses of the aqueous extract of C. edulis produced local congestion of the cardiac and hepatic vessels. Localized interstitial connective tissue proliferation, multifocal kidney interstitial hemorrhage, and localized tubular epithelium necrosis were also observed in female rats. Conclusions: The ethnobotanical uses of C. edulis among the Mbeere South community were documented for the first time. Limited antimicrobial efficacy and toxicity at high doses limit the use of leaves of C. edulis.