Hemalatha Bangera

Effects of lead in various preparatory stages of Nagabhasma on function and histopathology of cornu ammonis of hippocampus

INTRODUCTION Heavy metals are frequently used in the preparations of traditional/folk medicines. One such preparation in Ayurveda is Nagabhasma, in which lead is the main ingredient. Lead is non-essential element to the human body and is known toxic substance to many organ systems. However, it is claimed that, the highly toxic metallic lead will be converted into health beneficial organo-metallic compound when raw lead is subjected to various traditional methods of purification during preparation as mentioned in the ancient medicinal system. AIM The present study is designed to evaluate the effect of such detoxification of lead in various stages of authentically prepared Nagabhasma on the learning and memory. MATERIALS AND METHODS Using half of the human equivalent doses of traditionally prepared Nagabhasma, at intermittent stages of its preparation were fed orally to healthy Wistar rats for 30 days. After treatment, the immediate effect and residual effect after 2 months was evaluated by subjecting them to passive avoidance test. Then rats were sacrificed and hippocampus was collected for histopathological evaluation. RESULTS Pure lead treated animals showed deficit in learning and memory which is indicated by spending more time in the dark compartment in passive avoidance test. However, animals treated with stage 1 to 4 Nagabhasma showed gradual increase in the memory and learning. This observation is substantiated by the findings of the histopathology of the Cornu Ammonis (CA) region of hippocampus. CONCLUSION The results of the present study indicate that, the metallic toxicity of the lead used in the preparation of bhasma was gradually decreased from stage 1 to stage 4 of preparation. Therefore, the traditional way of preparing the metallic bhasma is very critical in eliminating the possible health hazardous metallic lead toxicity.

Histological and biochemical study of the superficial abdominal fascia and its implication in obesity.

The advancement of liposculpturing and fascial flaps in reconstructive surgery has renewed interest in the superficial fascia of abdomen. Its histological and biochemical composition may play a vital role in maintaining strength and elasticity of the fascia. Hence, study of abdominal fascia for the elastic, collagen, and hydroxyproline contents is desirable to understand asymmetrical bulges and skin folds and in improving surgical treatment of obesity. Samples of superficial fascia were collected from of upper and lower abdomen from 21 fresh cadavers (15 males and 6 females). Samples were stained using Verhoeff–Van Gieson stain. Digital images of superficial fascia were analyzed using TissueQuant software. The samples were also subjected to hydroxyproline estimation. The superficial fascia was formed by loosely packed collagen fibers mixed with abundant elastic fibers and adipose tissue. Elastic contents and collagen contents of superficial fascia were significantly more in the upper abdomen than that in the lower abdomen in males. Hydroxyproline content of superficial fascia of upper abdomen was significantly more than that of lower abdomen in both males and females. The elastic, collagen and hydroxyproline contents of superficial fascia of upper abdomen were higher compared to the lower abdomen. This may be a reason for asymmetric bulging over abdomen and more sagging fold of skin in the lower abdomen than in the upper abdomen. This study may therefore be helpful in finding new ways to manage obesity and other body contour deformities.