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[Microcirculatory aspects of the pathogenesis of diffuse cardiosclerosis in chronic ischemic heart disease]
Insights
Diffuse cardiosclerosis in chronic coronary heart disease (CHD) arises from disrupted microcirculation, leading to fibroblast changes that impede nutrient supply. This study reveals how impaired tissue supply drives pathological changes in heart tissue.
Area of Science:
- Cardiovascular Pathology
- Connective Tissue Biology
Context:
- Chronic coronary heart disease (CHD) is associated with diffuse cardiosclerosis.
- Microcirculatory alterations play a key role in cardiac tissue remodeling.
Purpose:
- To investigate the morphogenesis of diffuse cardiosclerosis in CHD.
- To understand the link between microcirculatory changes and pathological alterations in cardiac interstitium.
Summary:
- Morphogenesis of diffuse cardiosclerosis in chronic coronary heart disease (CHD) was studied using human cardio-biopsies and a rabbit model with atherogenic diet and pituitrin.
- Disorganization of transport-trophic tissue supply was found to stimulate desmoplastic processes, leading to the formation of protein-glycosaminoglycane complexes in the interstitium.
- These complexes influence stromal permeability and neoformation, with a notable "vasophilic" orientation of fibroblasts creating barriers around capillaries.
Impact:
- Reveals the mechanisms driving interstitial changes in diffuse cardiosclerosis.
- Highlights the role of fibroblast orientation in capillary barrier formation.
- Provides insights into the pathological processes underlying chronic heart disease complications.
Abstract:
The morphogenesis of the diffuse cardiosclerosis in chronic coronary heart disease (CHD) in connection with the microcirculatory alterations has been studied. 16 cardiobiopsies taken during the aortocoronary shunt operations and the heart of 15 rabbits fed atherogenic diet (0.25 g/kg cholesterol) for 8 weeks and at the same time given pituitrin every day at the dose level of 0.2 U/kg were examined. It is established that disorganization of the transporttrophic tissue supply stimulates desmoplastic processes. Protein-glycosaminoglycane complexes that are difficult to eliminate are formed in the interstitium with the participation of stromal cells; these complexes fill the loop-like constructions of the basic amorphous substance, are precipitated on the fibrillar structures influencing the permeability of stroma and its neoformation. Pathological changes in the interstitium structure are brought about in spite of the desmolithic reaction in which an express and lasting components may be distinguished. The most important element of diffuse cardiosclerosis in CHD is "vasophilic" orientation of fibroblasts leading to the formation of an additional barrier immediately arount blood capillaries.