Reversible effect of castration induced hypogonadism on the morphology of the left coronary arteries in adult male rabbits.

Hypogonadism is associated with an increased risk of coronary artery disease. This study sought to describe the histomorphology of the left coronary arteries of the adult male rabbit following orchiectomy and subsequent testosterone administration. We included 20 adult male rabbits, divided into a baseline group (n=2), an interventional group subjected to castration only (n=6), an intervention group subjected to castration followed by testosterone injection (n=6), and a control group (n=6). Key variables under investigation were serum testosterone levels, the intima-media thickness of coronary arteries, smooth muscle cell density, and adventitial collagen fiber density. The mean coronary arteries' intimal medial thickness was significantly higher in the castrated group than in controls (0.488 mm and 0.388 mm, respectively), while the testosterone-injected group had a mean of 0.440 mm. Mean smooth muscle cell density was significantly lower in the castrated rabbits vs. controls (26.96% and 47.80%, respectively), this observation being reversed with testosterone injection (47.53%). Mean adventitial collagen fiber density was significantly higher in the castrated group than in controls (66.6% and 36.1%, respectively), with a marginal difference after testosterone injection (65.2%). This study demonstrates that castration-induced hypogonadism causes morphological changes in the coronary arteries that are partly reversible using testosterone injections. These findings provide a morphological basis for understanding the role of testosterone in coronary arteries.

Anatomical Variations in the Origin of the Lumbar Artery: A Cadaveric Study Augmented by CT Findings.

BACKGROUND: Anatomical variations of lumbar arteries predispose them to iatrogenic injury during endovascular intervention or surgery. Due to limited morphological data on lumbar arteries in our setting, we aimed to determine their variant anatomy among Kenyans. METHODS: We performed the study on 90 cadaveric specimens and 120 computed tomography (CT) scans. Cadavers were dissected to expose the aorta and the lumbar arteries emerging from them. The number, origins, location relative to the vertebral bodies, and relations to aortic bifurcation were determined in cadavers and CT scans. Data were analyzed using SPSS (version 21.0). RESULTS: On average, 3 (3/90 [3.3%]), 4 (63/90 [70%]) or 5 (24/90 [26.7%]) pairs of lumbar arteries were observed among the cadaveric specimens, whereas 4 (100/120 [83.3%]) or 5 (20/120 [16.7%]) pairs were observed in CTs. Differences in the number of pairs observed in the cadaveric versus CT study were not statistically significant (P = .542). There were no sex differences in the number of lumbar artery pairs observed in CT scans (P = .178). The first 3 lumbar artery pairs had a single-origin, whereas the fourth lumbar artery had a common-stem origin. The first, second, and third lumbar arteries mostly originated at the upper third of their respective vertebral bodies. The fourth lumbar artery predominantly originated at the lower third. CONCLUSION: Our study's findings show unique variation in the lumbar arteries' relation to the vertebral bodies and the distances between artery pairs. LEVEL OF EVIDENCE: IV (cross-sectional study). CLINICAL RELEVANCE: Variations in the anatomy of the lumbar arteries should be taken into consideration, especially in surgical or interventional procedures to avoid inadvertent injury of the vessels.

Changes in the structure of chorioamniotic membrane in patients with malaria in pregnancy.

INTRODUCTION: Malaria infection in pregnancy has adverse consequences for both fetal and maternal health. There is insufficient data on the effect malaria in pregnancy has on the structure of the chorioamniotic membrane. Our objective was to determine the structure of the chorioamniotic membrane in patients with malaria in pregnancy. METHODS: Specimens of the chorioamniotic membrane from 58 women with malaria in pregnancy and 58 women without malaria in pregnancy were used for this study. Biopsies of the fetal membranes were obtained immediately after delivery and processed for light microscopy. They were stained using H & E. Photomicrographs were taken for morphological analysis and statistical analyses were performed using Statistical Package for Social Sciences (SPSS, Version 23.0, Chicago, Illinois). The independent-sample t-test and odds ratios were used to compare the appropriate values between the two groups at a 95% confidence interval. RESULTS: Photomicrographs of the chorioamniotic membrane showed histological alterations, including a change of amniotic epithelium to columnar and stratified types, epithelial delamination, extensive fibrin deposition, and leukocyte infiltration in women with malaria in pregnancy. Statistical analysis found significant differences in epithelial type (p-value 0.001, ×2 = 17.9), epithelial denudation (p-value <0.001, ×2 = 19.4) and extensive fibrin deposition (p-value of 0.02 and ×2 = 7.5) between the study groups. DISCUSSION: This study has demonstrated histological alterations in the chorioamniotic membrane in association with malaria in pregnancy. Further studies may be conducted to characterize chorioamnionitis in malaria in pregnancy and associations with adverse pregnancy outcomes.

Microscopic features of the rat adrenal gland associated with chronic codeine phosphate administration.

Codeine is an opioid analgesic and antitussive that has been widely abused. Some adverse effects noted with its abuse include adrenocortical insufficiency and activation of the hypothalamic-pituitary-adrenal axis. The structural basis for these dysfunctions is not clearly understood. Twenty-five adult male rats were used for the study. They were divided into intervention and control groups that were administered 40 mg/kg of codeine phosphate and normal saline respectively by gavage daily for 50 days. Subsequently, both groups were given normal saline for a further fourteen days to note recovery changes. At day 0, 50 and 64, rats were randomly selected from both groups, euthanized and adrenal glands harvested for histological processing and analysis. At day 50 of codeine administration, the adrenal glands demonstrated an increase in zona fasciculata thickness but a decrease in zona reticularis thickness. Lower values were noted in the volume density of zona reticularis and cells count of the medulla in the experimental compared to the control groups (P-value<0.05). The experimental group also showed an increase in vascularization and connective tissue in the glands. After 14 days of recovery, most of the changes observed in experimental animals were reversed and the adrenal glands in both groups had similar features. A decrease in cell count of the adrenal medulla was however observed (P-value<0.05). In conclusion administration of codeine phosphate causes discernible changes in the microscopic structure of the adrenal gland, most of which appear to be reversed after two weeks recovery period.