Canine Intestinal Organoids as a Novel In Vitro Model of Intestinal Drug Permeability: A Proof-of-Concept Study

A key component of efforts to identify the biological and drug-specific aspects contributing to therapeutic failure or unexpected exposure-associated toxicity is the study of drug-intestinal barrier interactions. While methods supporting such assessments are widely described for human therapeutics, relatively little information is available for similar evaluations in support of veterinary pharmaceuticals. There is, therefore, a critical need to develop novel approaches for evaluating drug-gut interactions in veterinary medicine. Three-dimensional (3D) organoids can address these difficulties in a reasonably affordable system that circumvents the need for more invasive in vivo assays in live animals. However, a first step in developing such systems is understanding organoid interactions in a 2D monolayer. Given the importance of orally administered medications for meeting the therapeutic need of companion animals, we demonstrate growth conditions under which canine-colonoid-derived intestinal epithelial cells survive, mature, and differentiate into confluent cell systems with high monolayer integrity. We further examine the applicability of this canine-colonoid-derived 2D model to assess the permeability of three structurally diverse, passively absorbed β-blockers (e.g., propranolol, metoprolol, and atenolol). Both the absorptive and secretive apparent permeability (P_app) of these drugs at two different pH conditions were evaluated in canine-colonoid-derived monolayers and compared with that of Caco-2 cells. This proof-of-concept study provides promising preliminary results with regard to the utility of canine-derived organoid monolayers for species-specific assessments of therapeutic drug passive permeability.

Qualitative evaluation of MRI features in aneurysmal bone cysts after percutaneous sclerotherapy

OBJECTIVE

To report MRI findings of changes seen in aneurysmal bone cysts after percutaneous sclerotherapy treatment.

MATERIALS AND METHODS

After applying exclusion criteria, a total of 36 patients who had aneurysmal bone cysts and undergone percutaneous sclerotherapy were included in this study. The pre-treatment and post-treatment MRIs were reviewed and multiple pre-determined MRI findings were evaluated. The presence of each post-treatment finding, as well as the time for each finding to develop, was recorded.

RESULTS

Early post-sclerotherapy changes include increased perilesional edema and enhancement, which appear on MRI on average 5.1 months after the initial sclerotherapy. This is followed by decreased cystic areas, which can be seen on average 5.9 months after the initial treatment. The presence of fibrosis, improved cortical integrity, and improving mass effect are later post-treatment changes and appear on MRI on average 9.7 months, 10.6 months, and 16.1 months after the initial sclerotherapy, respectively.

CONCLUSION

The early and late post-sclerotherapy MR findings of aneurysmal bone cysts were reported in this study.

[Problem Of Diabetic Foot Amputations]

INTRODUCTION

The diabetic foot wound is a real public health problem, 10% of the reasons for hospitalization. The risk of amputation is 10 to 30 times higher in diabetics than the general population.

OBJECTIVE

To study the problem of amputations of the diabetic foot.

METHOD

This was a descriptive and cross-sectional study that took place in the Department of Medicine and Endocrinology of the Mali Hospital from July 1st, 2016 to June 30th, 2017.

RESULTS

Twenty-five (25) diabetic patients were enrolled in our study. The sex ratio was 0.66. At admission, 100% of our patients had arterial disease, 96% neuropathy, and mixed foot in 80%. Poor glycemic control in 64% of patients; osteitis in 52% of cases; 92% of the patients had a 100% amputation risk according to the University of Texas classification. Nearly half or 46% of patients had amputations in the leg. We recorded 1 death case that is 4%.

CONCLUSION

The problem of amputation of diabetic feet is a function of the poor equilibrium and progressive neurological and vascular complications of diabetes.

[Appendiceal Duplication In A Patient Operated For Chilled Appendix Breastplate At Gao Regional Hospital]

Appendiceal duplication is the very rare malformation. It was first described by Picoli in 1892. It is a condition that is most often seen in the first years of life, sometimes some forms may remain asymptomatic and only occur in adulthood. We report the case of appendiceal duplication in a patient operated for chilled appendix breastplate at Gao Regional Hospital.

CONCLUSION

appendiceal duplication is a rare abnormal abnormality of intraoperative discovery in general. Each surgeon must think about it during an appendectomy.

Radiologic evaluation and management of postoperative spine paraspinal fluid collections

Postoperative paraspinal fluid collections can present a management dilemma to both radiologists and surgeons. Although many of these collections present as incidental findings and are unrelated to the presenting signs and symptoms that led to the imaging study, certain collections in the context of the appropriate clinical scenario may require additional evaluation and even emergent intervention. This article reviews those collections that are most frequently encountered and suggests management strategies that may assist in the evaluation and management of the patient.

[Upper gastrointestinal endoscopy during Kaposi's sarcoma to the Point G Hospital, Bamako (Mali): case study 20]

INTRODUCTION

Since the advent of HIV, Kaposi's sarcoma has become one of the most common opportunistic infections and the first cancer in patients with HIV. This cancerous disease occurs most often on the skin but also the viscera. Digestive localization was often observed during the search for other locations before the cutaneous form. No studies in Mali has focused on the upper gastrointestinal location.

OBJECTIVES

To describe the epidemiological and clinical aspects of Kaposi's sarcoma in the upper gastrointestinal endoscopy.

METHODS

This was a retrospective descriptive study from June 2005 to February 2009 in the center of endoscopy of the Point G Hospital including all patients seen in upper gastrointestinal endoscopy during the study period.

RESULTS

20 cases were reported from a total of 5068 endoscopy performed during this period a frequency of 0.39% hospital. These 20 cases were identified in all 31 patients with cutaneous localization of Kaposi's sarcoma is a frequency of 64.5%. The sex ratio was equal to 0.81. The average age was 36.8 years ± 8.92 years. The stomach and esophagus were found most locations. All patients were HIV positive. The CD4 count below 200 cells/mm3 was observed in 95% of patients.

[Undesirable effects of medicine in the Internal Medicine Service of the University Hospital Center du Point G]

The aim of this study was to determine the frequency of adverse reactions to drugs, the WHO grade, describe the clinical features and identify the drug responsible. This was a descriptive cross-sectional study which took place from February 2005 to January 2006 in the Internal Medicine Department at the hospital point G. Were included in this study, all patients hospitalized during the study period, which presented adverse drug reactions (ADRs) that the relation of cause and effect was certain or likely. Thus, 47 ADRs were identified in 39 patients of 426 admitted during the same period a frequency of 9.2%. The average age of our patients was 48.5 ± 16.5 years. The sex-ratio was 1.6 for women. Eighty-two percent of our patients had an ADR and 18% more than one. The WHO grade 1 was the most met or 36.2%, followed by grades 4 and 2 respectively 27.7% and 25.5%. Antidiabetics were responsible for adverse reactions in 46.8% and 21.3% in TB. Adverse events were neurological in 53.2% and type of manifestations of hypoglycemia 46.8% (22/47 cases), polyneuritis 6.4% (3 / 47 cases) and 29.8% in digestive cases dominated by vomiting 12.8% (6 / 47 cases), the epigastria pain 6.4% (3 / 47 cases). The outcome was favorable in 87.2% of cases, however, 3 cases of death among those over 60 years all grade 4 WHO. ADRs deserve special attention to this high death rate (6.4% 3/47 cases) where the interest to search systematically for all patients under medical treatment with a good clinical examination and questioning some thoroughly.

Adsorption Isotherm of Sodium Octylbenzenesulfonate on Iron Oxide Particles in Aqueous Solutions

The adsorption isotherm of sodium octylbenzene sulfonate has been determined at two pH values on dispersed maghemite particles in water. The isotherms present an adsorption maximum in the region of the surfactant critical micelle concentration. Additional adsorption experiments at the alumina/water interface as well as at the air/water interface in the presence of ferric ions suggest that the adsorption maximum in the case of the iron oxide particles is due to the presence of very small concentrations of ferric ions in the aqueous solution. These ions form surface active complexes with sodium octylbenzenesulfonate. These complexes are adsolubilized in the surfactant layers on the particles below the critical micelle concentration. They are desorbed from the surface and transferred into free micelles above the critical micelle concentration. These two phenomena are shown to be responsible for the adsorption maximum observed. The presence of ferric ions induces a surface tension minimum of the anionic surfactant at the air/water interface. This effect is discussed in relation to the adsorption maximum at the solid/water interface. Copyright 1998 Academic Press.