Bacteriologic

Purpose: We evaluated the kinetics of the hypoxia PET radiotracers, [18F]fluoromisonidazole ([18F]FMISO) and [18F] fluoroazomycin-arabinoside ([18F]FAZA), for tumor hypoxia detection and to assess the correlation of hypoxic kinetic parameters with static imaging measures in canine spontaneous tumors. Methods: Sixteen dogs with spontaneous tumors underwent a 150-min dynamic PET scan using either [18F]FMISO or [18F] FAZA. The maximum tumor-to-muscle ratio ­(TMR max ) > 1.4 on the last image frame was used as the standard threshold to determine tumor hypoxia. The tumor time-activity curves were analyzed using irreversible and reversible two-tissue compartment models and graphical methods. T­MR max was compared with radiotracer trapping rate (k 3 ), influx rate (K i ), and distribution volume (V T ). Results: Tumor hypoxia was detected in 7/8 tumors in the [18F]FMISO group and 4/8 tumors in the [18F]FAZA group. All hypoxic tumors were detected at > 120 min with [18F]FMISO and at > 60 min with [18F]FAZA. [18F]FAZA showed better fit with the reversible model. ­TMR max was strongly correlated with the irreversible parameters (k3 and Ki ) for [18F]FMISO at > 90 min and with the reversible parameter (V T ) for [18F]FAZA at > 120 min. Conclusions Our results showed that [18F]FAZA provided a promising alternative radiotracer to [18F]FMISO with detecting the presence of tumor hypoxia at an earlier time (60 min), consistent with its favorable faster kinetics. The strong correlation betwee TMR max over the 90–150 min and 120–150 min timeframes with [18F]FMISO and [18F]FAZA, respectively, with kinetic parameters associated with tumor hypoxia for each radiotracer, suggests that a static scan measurement ( ­TMR max ) is a good alternative to quantify tumor hypoxia.

Background: Chronic obstructive pulmonary disease (COPD) is one of the contributors to the burden of non-communicable disease. Health education is a key component in COPD management. Effective health education interventions directed to patient, family and community are necessary to prevent exacerbations, emergency room visits, hospitalizations and improve quality of life for patients with COPD. The general objective of the study was to determine effectiveness of health education interventions directed to patient, family and community. Specifically, to determine the effect on the number of acute exacerbations, COPD related emergency room visits and hospitalizations, improvement in the quality of life and patient satisfaction. Methods: This study only included comparative clinical trials randomized or non- randomized, parallel or cross-over clinical trial design, cohort study involving humans as the participants. It also includes published studies in peer reviewed journals of PubMed, clinical trials registered Cochrane Central Register of Controlled Trials, and the grey literature. There were no foreign language studies included relevant to this review. The non-comparative clinical trials, outcomes research or real-world data, animal experiments, reviews and case reports were excluded. The study population of reviewed literature has an established diagnosis of Chronic Obstructive Pulmonary Disease based on the Global Initiative for Chronic Obstructive Lung Disease (GOLD) criteria for diagnosis of COPD. Studies involving COPD patients who have other co morbidities were also included. The patients with COPD in the study were similar to patients consulting in family and community medicine practice clinics in the Philippines. Data synthesis was done separately for each type of intervention, i.e., patient directed, family directed, community directed health education intervention on Chronic Obstructive Pulmonary Disease. Quantitative analysis was only possible for studies reporting similar outcomes and units of measures such as number of COPD-related hospitalizations and emergency room visits for health education intervention directed to patient and improvement in the quality-of-life scores for health education intervention directed to family and community. Narrative synthesis was done when it was not feasible to include studies to do pooled analysis due to any of the following reasons such as different outcomes and when outcomes not reported as means with standard deviation. The Review Manager 5 software was used in the analysis of the data. Sensitivity analysis was done by restricting the analysis to published studies and with low risk of bias. Results: A total of ten studies were included. Health education interventions directed to patient has no benefit in decreasing the number of COPD related emergency room visits (1.84, 95% CI 0.94,2.74) and insufficient evidence to decrease the number of COPD related hospitalizations (4.33,95%CI-4.69,13.34). Health education intervention directed to family have insufficient evidence to improve the quality of life among patients with COPD (0.35,95% CI -0.49,1.19). Community directed health education intervention have significantly improved the quality of life among patients with COPD (-1.95,95% CI -3.37, -0.53).The studies had low risk for bias in terms of random sequence generation, allocation concealment and blinding of outcome assessment except for one study that was a non-randomized trial (Tabari et al, 2018). The highest risk for bias across the studies was the non-blinding of the participants. The withdrawals or dropouts in one study exceeded 20%. Three studies reported non possibility of blinding the assessor (Marques et al 2015, Nguyen et al 2019, Tabari et al 2018). Furthermore, five studies (Gallefos, 2004, Hernandez et al 2015, Tabari et al 2018, Van Wetering et al 2010, Marques et al, 2015) did not report the use of intention to treat analysis Discussion Effective health education interventions directed to patient, family and community in conjunction with standard of care may decrease exacerbations, hospitalizations, emergency visits, better quality of life and patient satisfaction. The studies included for this review were heath education interventions solely directed to patient, to family and to community and not a combination of the interventions directed to patient and family, or patient and community, or patient and family and community. Overall, health education interventions are integrated in a patient centered family focused community-oriented care for COPD. Health education is just one of the components of the integrated care on COPD. Better control of COPD is likely due to the combined effects of the different care components. Hence, there is a need for more randomized controlled trials on health education interventions directed to patient and family. Inclusion of COPD related hospitalizations, emergency room visits, acute exacerbations as outcome measures in health education interventions directed to patient, family and community is useful to provide evidence in effectiveness of the intervention. The authors declare no financial or funding involvement in the development and implementation of this study. This protocol was registered with Research Grants Administration Office (RGAO) with Registration No. RGAO-2020-1276, Research Implementation Development Office (RIDO) and to the Research Committee of the Philippine Academy of Family Physicians. The study was given Certification of Exemption from Ethical Review by the University of the Philippines Research Ethics Board (UPMREB CODE: UPMREB 2020-783-EX
Pulmonary Disease, Chronic Obstructive

INTRODUCTION

This study was conducted to determine the utility of two-dimensional speckle tracking echocardiography (2D STE) in predicting major adverse cardiac events (MACEs) in patients with non-ST-elevation acute coronary syndrome (NSTE-ACS).

This is a prospective cohort study that included 91 patients diagnosed to have NSTE-ACS. In-hospital and 6-month MACEs were evaluated in relation to their baseline echocardiographic parameters, 2D speckle strain, and strain rate analyses.

Among the conventional echocardiographic parameters, only left ventricular end-systolic diameter (LVESD) and wall motion scores showed significant difference between those with and without outcomes after 6 months. Significant higher wall motion scores (24.06 vs 20.91 P = 0.0320) and LVESD (3.36 vs 2.97 cm, P = 0.0125) were noted among those who had MACE after 6 months. There were no significant differences among the 2D STE strain and strain rate between those patients with and without MACE during their hospital admission. However, after 6-month follow-up, significantly lower mean left ventricular global longitudinal strain (GLS) (−14.22% ± 4.45% vs −16.44% ± 4.19%, P = 0.0261) and strain rate (−0.69 ± 0.36 s-1 vs −0.94 ± 0.25 s-1, P = 0.009) were observed among patients with MACE compared with those without. Incidence of reduced GLS strain and strain rate was significantly higher in those with MACE after 6 months. Left ventricular GLS sensitivity and specificity were 64.64% and 61.70%, respectively, at a cutoff value of less than −15.0% for detecting MACE within 6 months. Left ventricular GLS cutoff point less than −12.0%, which detects severe LV dysfunction in previous studies, have a sensitivity of 40% but a high specificity of 82.98% for predicting MACE after 6 months.

Both LV GLS strain and strain rate can be used to predict major adverse cardiovascular events after NSTE-ACS.

Tumor cell proliferation, infiltration, migration, and neovascularization are known causes of treatment resistance in glioblastoma multiforme (GBM). The purpose of this study was to determine the effect of radiation on the growth characteristics of primary human GBM developed in a nude rat. Primary GBM cells grown from explanted GBM tissues were implanted orthotopically in nude rats. Tumor growth was confirmed by magnetic resonance imaging on day 77 (baseline) after implantation. The rats underwent irradiation to a dose of 50 Gy delivered subcuratively on day 84 postimplantation (n = 8), or underwent no radiation (n = 8). Brain tissues were obtained on day 112 (nonirradiated) or day 133 (irradiated). Immunohistochemistry was performed to determine tumor cell proliferation (Ki-67) and to assess the expression of infiltration marker (matrix metalloproteinase-2, MMP-2) and cell migration marker (CD44). Tumor neovascularization was assessed by microvessel density using von-Willebrand factor (vWF) staining. Magnetic resonance imaging showed well-developed, infiltrative tumors in 11 weeks postimplantation. The proportion of Ki-67-positive cells in tumors undergoing radiation was (71 +/- 15)% compared with (25 +/- 12)% in the nonirradiated group (P = 0.02). The number of MMP-2-positive areas and proportion of CD44-positive cells were also high in tumors receiving radiation, indicating great invasion and infiltration. Microvessel density analysis did not show a significant difference between nonirradiated and irradiated tumors. Taken together, we found that subcurative radiation significantly increased proliferation, invasion, and migration of primary GBM. Our study provides insights into possible mechanisms of treatment resistance following radiation therapy for GBM.
Animals ; Brain Neoplasms ; metabolism ; pathology ; radiotherapy ; Cell Line, Tumor ; Cell Movement ; radiation effects ; Cell Proliferation ; radiation effects ; Female ; Glioblastoma ; metabolism ; pathology ; radiotherapy ; Humans ; Hyaluronan Receptors ; metabolism ; Immunohistochemistry ; Ki-67 Antigen ; metabolism ; Magnetic Resonance Imaging ; Matrix Metalloproteinase 2 ; metabolism ; Microvessels ; pathology ; Neoplasm Transplantation ; Neovascularization, Pathologic ; pathology ; Radiation Tolerance ; Radiotherapy, High-Energy ; Rats ; Rats, Nude

The development of veterinary dentistry has substantially improved the ability to diagnose canine and feline dental abnormalities. Consequently, examinations previously performed only on humans are now available for small animals, thus improving the diagnostic quality. This has increased the need for technical qualification of veterinary professionals and increased technological investments. This study evaluated the use of cone beam computed tomography and intraoral radiography as complementary exams for diagnosing dental abnormalities in dogs and cats. Cone beam computed tomography was provided faster image acquisition with high image quality, was associated with low ionizing radiation levels, enabled image editing, and reduced the exam duration. Our results showed that radiography was an effective method for dental radiographic examination with low cost and fast execution times, and can be performed during surgical procedures.
Animals ; Cat Diseases/*radiography ; Cats ; Cone-Beam Computed Tomography/*veterinary ; Dental Implants ; Dog Diseases/*radiography ; Dogs ; Female ; Male ; Mouth/injuries ; Periodontal Diseases/radiography/*veterinary ; Tooth Diseases/radiography/*veterinary ; Wounds and Injuries

The posterior inferior cerebellar artery (PICA) is often involved in pathologies of the posterior cranial fossa. Therefore, a good understanding of the vessel’s normal and variant courses is important to the neurosurgeon or neurointerventionalist. During the routine microdissection of the craniocervical junction, an unusual arrangement between the highest denticulate ligament and PICA was observed. On the right side, the PICA was given rise to by the V4 segment of the vertebral artery 9 mm after the artery entered the dura mater of the posterior cranial fossa. The artery made an acute turn around the lateral edge of the highest denticulate ligament to then recur 180 degrees and travel medially toward the brainstem. Invasive procedures that target the PICA should be aware of the variant as described herein.

The laryngopharyngeal nerve has received much less attention that the other contributions to the pharyngeal plexus i.e., glossopharyngeal and vagus nerves. Often, in descriptions and depictions, the nerve is simply labeled as the sympathetic contribution to the pharyngeal plexus. As there is such scant information available regarding this nerve, the present review was performed. Very little is found in the extant medical literature regarding the laryngopharyngeal nerve. However, based on available data, the nerve is a consistent contributory to the pharyngeal plexus and serves other adjacent areas e.g., carotid body. Therefore, a better understanding of this structure’s anatomy is important for those who operate in this area. Further studies are necessary to better elucidate the true function of the laryngopharyngeal nerve.

Background/Aims: Chagasic megacolon is caused by Trypanosoma cruzi, which promotes in several cases, irreversible segmental colonic dilation. This alteration is the major anatomic-clinical disorder, characterized by the enteric nervous system and muscle wall structural damage. Herein, we investigate how T. cruzi-induced progressive colonic structural changes modulate the colonic contractile pattern activity. Methods: We developed a murine model of T. cruzi-infection that reproduced long-term modifications of the enlarged colon. We evaluated colonic and total intestinal transit time in animals. The patterns of motor response at several time intervals between the acute and chronic phases were evaluated using the organ bath assays. Enteric motor neurons were stimulated by electric field stimulation. The responses were analyzed in the presence of the nicotinic and muscarinic acetylcholine receptor antagonists. Western blot was performed to evaluate the expression of nicotinic and muscarinic receptors. The neurotransmitter expression was analyzed by real-time polymerase chain reaction. Results: In the chronic phase of infection, there was decreased intestinal motility associated with decreased amplitude and rhythmicity of intestinal contractility. Pharmacological tests suggested a defective response mediated by acetylcholine receptors. The contractile response induced by acetylcholine was decreased by atropine in the acute phase while the lack of its action in the chronic phase was associated with tissue damage, and decreased expression of choline acetyltransferase, nicotinic subunits of acetylcholine receptors, and neurotransmitters. Conclusions T. cruzi-induced damage of smooth muscles was accompanied by motility disorders such as decreased intestinal peristalsis and cholinergic system response impairment. This study allows integration of the natural history of Chagasic megacolon motility disorders and opens new perspectives for the design of effective therapeutic.

Specific anti-venom used to treat scorpion envenomation is usually obtained from horses after hyperimmunization with crude scorpion venom. However, immunized animals often become ill because of the toxic effects of the immunogens used. This study was conducted to evaluate the toxic and immunogenic activities of crude and detoxified Tityus serrulatus (Ts) venom in sheep during the production of anti-scorpionic anti-venom. Sheep were categorized into three groups: G1, control, immunized with buffer only; G2, immunized with crude Ts venom; and G3, immunized with glutaraldehyde-detoxified Ts venom. All animals were subjected to clinical exams and supplementary tests. G2 sheep showed mild clinical changes, but the other groups tolerated the immunization program well. Specific antibodies generated in animals immunized with either Ts crude venom or glutaraldehyde-detoxified Ts venom recognized the crude Ts venom in both assays. To evaluate the lethality neutralization potential of the produced sera, individual serum samples were pre-incubated with Ts crude venom, then subcutaneously injected into mice. Efficient immune protection of 56.3% and 43.8% against Ts crude venom was observed in G2 and G3, respectively. Overall, the results of this study support the use of sheep and glutaraldehyde-detoxified Ts venom for alternative production of specific anti-venom.
Animals ; Antibodies ; Horses ; Immunization Programs ; Mice ; Scorpion Venoms ; Scorpions ; Sheep* ; Venoms*