Morfologiia (Saint Petersburg, Russia)最新文献

A comprehensive anthropometric and bioelectrical study of 651 women of mature age (relative norm) aged 22 to 55 years living in the Moscow region, was conducted. The somatotyping was performed according to I.B. Galant-V.P. Chtetzov-B.A. Ni kitiuk scheme. The quantitative distribution of women according to their somatotypological characteristics was obtained, the anthropometric peculiarities and the specific features of body composition in women belonging to different somatotypes were determined. It was found that among the women of mature age studied, mesoplastic (26.9%) and stenoplastici (16.7%) somatotypes were dominant. The least frequently encountered were the representatives of asthenic (1.7%) and athletic (5.2%) somatic types. Women of different somatotypes vary significantly in height and weight and other anthropometric parameters.

The peculiarities of regeneration of knee articular cartilage were studied experimentally in adult Wistar rats (n = 25) using the methods of optical and electron microscopy, histochemistry and x-ray electron probe microanalysis after modeling marginal perforated defect and implantation of granulated mineralized bone matrix (MBM) into the damaged zone. This biomaterial was demonstrated to have marked chondroinductive properties, to provide prolonged activation of reparative process, accelerated organotypical remodeling and restoration of the damaged articular cartilage. The data obtained indicate the possibility of MBM application in clinical practice for the treatment of injuries and diseases of the articular cartilage.

The present review summarizes the literature data and the results of authors' own research on the development, structure, function and regeneration of D-endocrinocytes of gastroenteropancreatic (GEP) system. The history of the research of these cells is reviewed and its current state of the problem is discussed. The information on the difference of somatostatin-producing D-endocrinocytes from other types of endocrine cells of GAP system is presented, namely, the prevalence of these cells in all the organs of the digestive system (stomach, small and large intestine, pancreas) and other systems of the body, the peculiarities of their structure and regeneration in various species of vertebrate animals and humans in embryonic development, under conditions of normal functioning and in various types of pathology. On the basis of the data on the early differentiation of D-endocrinocytes and their secretion of hormones during embryonic development, structure, cytophysiology and relationships within the general endocrinocyte population, it is suggested that D-endocrinocytes play an important role in the morpho-functional state of GEP system.

The aim of the study was laminar morphometric study of immuno-labeled parvalbumin containing (PA+) neurons of cortical somatosensory area SI in outbred albino rats (n = 10). The study of frontal and tangential sections 60 μm and 4 μm thick demonstrated a considerable diversity in cell body shape and size as well as in branching of the processes in PA+ neurons in all the layers of the cortex. The greatest number of PA+ neurons (47.1%) was found in layer IV of the cortex, in the zone of barrel formation. The study of tangential sections has shown that the largest number of PA+ neurons was localized in the barrel septa (43%). In layer IV, their greatest density was detected in the walls of the barrel, making it possible to clearly identify their outlines. Quantitative predominance of PA+ neurons in the septa may be associated with the direction of their dendrite course into the inner part of the barrel and the formation of dendro-dendritic gap junctions that, in turn, could be a morphological basis of individual local pacemaker rhythmogenesis and regulation of the functional state of the cortical columns.

This paper compares the results of application of various methods of histochemical and immunohistochemical staining of mast cells (MC) in human myocardium after formalin fixation and paraffin embedding of the material. It was shown that the optimal methods for description of their structure were toluidine blue staining and and Giemsa stain, while alcian blue staining represented the most suitable histochemical method for MC counting. In combination with immunohistochemical detection of synaptophysin, it could be used for identification of co-localization of MC and nerve terminals in the myocardium. Combined staining of MC with alcian blue and safranin is not suitable for human formalin-fixed myocardial MC. Immunohistochemical techniques of MC tryptase and chymase demonstration appear to be more sensitive when compared with histochemical methods, and allow the most comprehensive quantitative description of human myocardial MC population.

To observe the formation of blood flow in the juxtaglomerular pathway in comparative-anatomical and age-related aspects, 484 kidneys from the representatives of the five classes of vertebrates, 50 kidneys of human fetuses and 193 kidneys of normal individuals of different ages were studied. Macro-microscopic, histological and morphometric methods were used. In all the mammalian animal species, the significant development of vascular glomeruli and peritubular capillaries was observed. In human kidneys, the relative content of cortical and medullary arterial vessels was maximal in juvenile age. With age, this parameter was found to decrease both in renal cortex and medulla. The differentiation of renal tissue into the cortex and the medulla, that began in birds and was finally formed in mammals, explains the appearance of cortical and juxtamedullary blood flow pathways. During the antenatal period of human development, renal juxtaglomerular pathway of blood flow prevails over the cortical one. The diminished significance of juxtamedullary pathway of blood flow in elderly and senile age determines the decreased adaptive capacities of intraorgan renal arterial bed in the norm.

Age-related peculiarities of the adaptation of the hypothalamo-hypophyseo-adrenal system (HHAS) to the effect of heterotypic stress was studied experimentally in the context of stress-associated behavioral reactions. Young (3 month old), mature (6 month old) and aging (12 month old) Sprague Dawley rats (total number of animals equal to 36) were exposed to chronic heterotypic stressors for 7 days with the subsequent testing of their behavioral responses. Histological changes were studied in the hypothalamus, pituitary and adrenal glands as compared to age-matched control; immunohistochemical reactions were performed to demonstrate CRF, ACTH, ED1, PCNA and caspase-3 with subsequent image analysis. In the aging organism, as compared to young and mature animals, the degree of HHAS activation indicated the dissociation in its central part and adaptive desensitization prevention, typical to young and mature animals. Specifically, in the aging animals exposed to stress, high hypothalamic CRF expression was noted in association with relatively low hypophyseal ACTH expression and high level of adrenal activity. Reduced HHAS plasticity in the aging animals as compared to that in the other age groups, corresponded to their behavioral changes, demonstrating the reduced capacity of the aging organism to adapt to the exposure of unpredictably changing stressors.