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Dermatan sulfate remodeling associated with advanced Dupuytren's contracture

100%
Koźma E. M., Głowacki A., Olczyk K., Ciecierska M.
Acta Biochimica Polonica
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2007
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vol. 54
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issue 4
821-830
EN
Dermatan sulfate (DS) widespread as a component of extracellular matrix proteoglycans, is characterized by great bio-reactivity and remarkable structural heterogeneity due to distinct degrees of sulfation and glucuronosyl epimerization and different polymerization degrees. However, DS metabolism under various biological conditions is poorly known. Dupuytren's contracture is a benign fibromatosis leading to complex remodeling of the palmar fascia structure and properties. However, it remains unclear whether the disease affects the structure of DS, which is the major tissue glycosaminoglycan. Thus the aim of the study was to examine the structure of the total DS in Dupuytren's fascia. DS chains were extracted from 5 samples of normal fascia and 7 specimens of Dupuytren's tissue by papain digestion followed by fractionation with cetylpyridinium chloride. Then, DS structure analysis was performed comprising the evaluation of its molecular masses and sensitivity to hyaluronidase and chondroitinase B. Dupuytren's contracture is associated with significant remodeling of DS chain structure revealed by (1) a distinct profile of chain molecular masses characterized by the appearance of long size components as well as the increase in the content of small size chains; (2) a different glucuronosyl epimerization pattern connected with the enhanced content of glucuronate disaccharide blocks; (3) chain oversulfation. These structural alterations in total DS may modify the GAG interactions especially affecting collagen fibrillogenesis and growth factor availability. Thus, Dupuytren's contracture associated DS remodeling may promote the phenomena typical for advanced disease: apoptosis and reduction in cell number as well as the appearance of dense pseudotendinous collagen matrix.
2
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Training Load Structure of Young Soccer Players in a Typical Training Microcycle during the Competitive and the Transition Period

100%
Głowacki A., Ignatiuk W., Konieczna A., Jastrzębski Z.
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EN
Background: The aims of this study were: (1) to characterize the training load structure and the applied training means in typical microcycles of the transition period and the competitive season administered to young soccer players, and (2) to present exemplary training units of the competitive and the transition periods.Material/Methods: 20 young soccer players (12-13 years old) took part in the study. Jastrzębski's method based on Sozański and Śledziewski was applied to register and monitor the training load. Data was analyzed regarding the information range (general or specific drills) as well as energetic zones (aerobic, mixed aerobic-anaerobic, anaerobic lactate or anaerobic alactate drills).Results: The results of study show crucial differences in the applied training means in the analyzed microcycles. In a typical microcycle of the transition period general drills predominate, while during the competitive period - specific drills prevail. The total effective time of training was longer in the competitive season microcycle. It is a proper relationship according to the theory of sport training.Conclusions: The range of the training load registered in the competitive season is in line with other authors' research where league matches and small-sided games were used particularly often. The studied microcycles in the competitive season can be model ones and can be used in the training process of young football players.
3
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Glycosaminoglycan-collagen interactions in vitro in the hydralazine-induced collagen disease-like syndrome

100%
Głowacki A., Kucharz E. J., Olczyk K.
Acta Biochimica Polonica
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1993
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vol. 40
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issue 1
182-185
4
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Serum glycoproteins in patients with hypo- and hyperthyroidism

100%
Kucharz E. J., Olczyk K., Głowacki A., Duraj-Kassem M.
Acta Biochimica Polonica
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1993
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vol. 40
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issue 1
151-153
5
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Protein-bound glycosaminoglycans in serum of patients with lung cancer and patients with diabetes mellitus

88%
Olczyk K., Kucharz E. J., Głowacki A., Sonecki P., Kościelniak-Kocurek E.
Acta Biochimica Polonica
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1992
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vol. 39
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issue 1
101-105
6
Content available remote

Glycosaminoglycans of human serum and their alterations in diabetes mellitus

76%
Koźma E. M., Olczyk K., Głowacki A., Komosińska K., Sonecki P., Najmiec T., Jaźwiec M.
Acta Biochimica Polonica
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1996
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vol. 43
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issue 3
567-574
7
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Glycosaminoglycans of normal and scarred fascia

75%
Głowacki A., Olczyk K., Sonecki P., Koźma E., Najmiec T.
Acta Biochimica Polonica
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1994
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vol. 41
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issue 2
166-169
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