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Petek M, Toth N, Pecina M, Karažija T, Lazarević B, Palčić I, Veres S, Ćustić MH. Beetroot mineral composition affected by mineral and organic fertilization. PLoS One 2019; 14:e0221767. [PMID: 31490954 PMCID: PMC6730864 DOI: 10.1371/journal.pone.0221767] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 08/14/2019] [Indexed: 11/19/2022] Open
Abstract
In modern agriculture, besides providing high and stable yields, it is imperative to produce products with a high nutritive quality. The goal of this study was to determine the effect of different fertilization regimes on the macro- and micronutrients in beetroot. A 3-year field trial was set up according to a Latin square method with four types of fertilization (unfertilized control, 50 t stable manure ha−1, and 500 and 1,000 kg NPK 5-20-30 ha−1). The mineral content was determined as follows (mg 100 g−1 in fresh weight of beetroot): 14–29 P, 189–354 K, 18–34 Ca, 17–44 Mg, 0.67–1.83 Fe, 0.41–0.65 Mn and 0.28–0.44 Zn. The highest beetroot P content was determined for the treatment with stable manure, especially in a year with dry climatic conditions. The highest beetroot K content was determined for the treatment with 1,000 kg NPK 5-20-30 ha−1, but at the same time for the same treatment, a general decreasing trend of micronutrient content was determined, due to the possible antagonistic effect of added potassium. For better mineral status of beetroot, application of combined mineral and organic fertilizers supplemented with additional foliar application of micronutrients can be suggested.
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Affiliation(s)
- Marko Petek
- Department of Plant Nutrition, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
- * E-mail:
| | - Nina Toth
- Department of Vegetable Crops, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
| | - Marija Pecina
- Department of Plant Breeding, Genetics, and Biometrics, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
| | - Tomislav Karažija
- Department of Plant Nutrition, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
| | - Boris Lazarević
- Department of Plant Nutrition, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
- Centre of Excellence for Biodiversity and Molecular Plant Breeding, Zagreb, Croatia
| | - Igor Palčić
- Centre of Excellence for Biodiversity and Molecular Plant Breeding, Zagreb, Croatia
- Institute of Agriculture and Tourism, Poreč, Croatia
| | - Szilvia Veres
- Department of Agricultural Botany, Plant Physiology and Biotechnology, Institute of Crop Sciences, University of Debrecen, Debrecen, Hungary
| | - Mirjana Herak Ćustić
- Department of Plant Nutrition, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
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Piria M, Simonović P, Zanella D, Ćaleta M, Šprem N, Paunović M, Tomljanović T, Gavrilović A, Pecina M, Špelić I, Matulić D, Rezić A, Aničić I, Safner R, Treer T. Long-term analysis of fish assemblage structure in the middle section of the Sava River - The impact of pollution, flood protection and dam construction. Sci Total Environ 2019; 651:143-153. [PMID: 30227284 DOI: 10.1016/j.scitotenv.2018.09.149] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 09/10/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
At the beginning of the 20th century, the middle section of the Sava River in Croatia was unaffected by major human activities and rich in ichthyofauna. The Sava River was important for commercial and recreational fishing for the local population, which still remains today. However, the 1920s mining industry was established in Slovenia, which emitted carbon dust into the Sava River. At the same time, the construction of embankments to mitigate flooding started in the middle section. Furthermore, in the 1980s, the Krško nuclear power plant (NPP), and in the 2010s, the Krško hydropower plant (HPP) were built in Slovenia. These activities could have an impact on the composition of fish communities downstream from the major sources of disturbances. Therefore, the main aim of this paper were to analyze the changes in fish assemblages of the Sava River from 1978 to 2017, prior to and after the construction of Krško NPP and HPP at the Medsave site on the Sava River, 20 km downstream from the major construction operations. Collected data were divided into four sampling periods (SP): SP1, from 1978 to 1980; SP2, from 1991 to 1994; SP3, from 2001 to 2006, and SP4 from 2011 to 2017. Besides alien fish species, water quality and hydromorphological modifications were identified as significant stressors. In SP1 and SP2 limnophilic and eurytopic fish groups were predominant, and 26 different fish species were identified, but in SP3 and SP4 rheophilic fish groups become dominant, and the diversity has declined to 21 species. Threatened species blageon, Telestes souffia seems to be missing from the main course of the Sava River in last 20 years. It can be concluded that disturbances in the fish assemblage pattern have coincided with the presence of multiple stressors of human origin.
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Affiliation(s)
- Marina Piria
- University of Zagreb, Faculty of Agriculture, Department of Fisheries, Beekeeping, Game Management and Special Zoology, Svetošimunska cesta 25, 10000 Zagreb, Croatia.
| | - Predrag Simonović
- University of Belgrade, Faculty of Biology, Studentski trg 16, PO Box 550, 11000 Belgrade, Serbia; University of Belgrade, Institute for Biological Research "Siniša Stanković", Bulevar Despota Stefana 142, 11060 Belgrade, Serbia
| | - Davor Zanella
- University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6, 10000 Zagreb, Croatia
| | - Marko Ćaleta
- University of Zagreb, Faculty of Teacher Education, Savska cesta 77, 10000 Zagreb, Croatia
| | - Nikica Šprem
- University of Zagreb, Faculty of Agriculture, Department of Fisheries, Beekeeping, Game Management and Special Zoology, Svetošimunska cesta 25, 10000 Zagreb, Croatia
| | - Momir Paunović
- University of Belgrade, Institute for Biological Research "Siniša Stanković", Bulevar Despota Stefana 142, 11060 Belgrade, Serbia
| | - Tea Tomljanović
- University of Zagreb, Faculty of Agriculture, Department of Fisheries, Beekeeping, Game Management and Special Zoology, Svetošimunska cesta 25, 10000 Zagreb, Croatia
| | - Ana Gavrilović
- University of Zagreb, Faculty of Agriculture, Department of Fisheries, Beekeeping, Game Management and Special Zoology, Svetošimunska cesta 25, 10000 Zagreb, Croatia
| | - Marija Pecina
- University of Zagreb, Faculty of Agriculture, Department of Plant Breeding, Genetics and Biometrics, Svetošimunska cesta 25, 10000 Zagreb, Croatia
| | - Ivan Špelić
- University of Zagreb, Faculty of Agriculture, Department of Fisheries, Beekeeping, Game Management and Special Zoology, Svetošimunska cesta 25, 10000 Zagreb, Croatia
| | - Daniel Matulić
- University of Zagreb, Faculty of Agriculture, Department of Fisheries, Beekeeping, Game Management and Special Zoology, Svetošimunska cesta 25, 10000 Zagreb, Croatia
| | - Andrea Rezić
- University of Zagreb, Faculty of Agriculture, Department of Fisheries, Beekeeping, Game Management and Special Zoology, Svetošimunska cesta 25, 10000 Zagreb, Croatia
| | - Ivica Aničić
- University of Zagreb, Faculty of Agriculture, Department of Fisheries, Beekeeping, Game Management and Special Zoology, Svetošimunska cesta 25, 10000 Zagreb, Croatia
| | - Roman Safner
- University of Zagreb, Faculty of Agriculture, Department of Fisheries, Beekeeping, Game Management and Special Zoology, Svetošimunska cesta 25, 10000 Zagreb, Croatia
| | - Tomislav Treer
- University of Zagreb, Faculty of Agriculture, Department of Fisheries, Beekeeping, Game Management and Special Zoology, Svetošimunska cesta 25, 10000 Zagreb, Croatia
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Pasković I, Herak Ćustić M, Pecina M, Bronić J, Ban D, Radić T, Pošćić F, Jukić Špika M, Soldo B, Palčić I, Goreta Ban S. Manganese soil and foliar fertilization of olive plantlets: the effect on leaf mineral and phenolic content and root mycorrhizal colonization. J Sci Food Agric 2019; 99:360-367. [PMID: 29882389 DOI: 10.1002/jsfa.9196] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 05/29/2018] [Accepted: 06/04/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The present study aimed to examine the effect of foliar (Mn_fol) and soil Zeolite-Mn (Mn_ZA) application on leaf mineral, total phenolic and oleuropein content, and mycorrhizae colonization of self-rooted cv. Leccino plantlets grown on calcareous soil. RESULTS The dissolution of zeolite was 97% when citric acid was applied at 0.05 mM dm-3 , suggesting that organic acids excreted by roots can dissolve modified zeolite (Mn_ZA), making Mn available for plant uptake. The leaf Mn concentration was the highest for Mn_fol treatment at 90 days after transplanting (DAT) (172 mg kg-1 ) and 150 DAT (70 mg kg-1 ) compared to other treatments. Mn_ZA soil application increased leaf Mn concentration at 150 DAT compared to control and NPK treatments. The oleuropein leaf content was highest for Mn_fol compared to other treatments at 90 DAT and lowest at 150 DAT. Arbuscular mycorrhizal colonization was higher for Mn_fol treatment at 150 DAT compared to all other treatments. CONCLUSION Changes in the arbuscular colonization percentage and oleuropein content may be connected to stress conditions provoked by a high leaf Mn concentration in the Mn_fol treatment at 90 DAT. Mn_ZA application increased leaf Mn concentration at 150 DAT compared to control and NPK treatments. It can be assumed that the dominant mechanism in Mn uptake from modified zeolite is Mn_ZA dissolution through root exudates. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Igor Pasković
- Institute of Agriculture and Tourism, Poreč, Croatia
| | | | - Marija Pecina
- Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
| | | | - Dean Ban
- Institute of Agriculture and Tourism, Poreč, Croatia
- Centre of Excellence for Biodiversity and Molecular Plant Breeding, Zagreb, Croatia
| | - Tomislav Radić
- Institute for Adriatic Crops and Karst Reclamation, Split, Croatia
| | - Filip Pošćić
- Institute for Adriatic Crops and Karst Reclamation, Split, Croatia
| | - Maja Jukić Špika
- Institute for Adriatic Crops and Karst Reclamation, Split, Croatia
| | - Barbara Soldo
- Department of Chemistry, Faculty of Science, University of Split, Split, Croatia
| | - Igor Palčić
- Institute of Agriculture and Tourism, Poreč, Croatia
- Centre of Excellence for Biodiversity and Molecular Plant Breeding, Zagreb, Croatia
| | - Smiljana Goreta Ban
- Institute of Agriculture and Tourism, Poreč, Croatia
- Centre of Excellence for Biodiversity and Molecular Plant Breeding, Zagreb, Croatia
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Abstract
Synchronized skating is a relatively new competitive sport and data about injuries in this discipline are lacking. Therefore the purpose of this study was to investigate the frequency and pattern of acute and overuse injuries in synchronized skaters. Before and during the World Synchronized Skating Championship 2004, a questionnaire inquiring about the frequency of injuries in this skating discipline was given to 23 participating teams. A total of 514 women and 14 men senior skaters completed the questionnaires (100 % response). Two hundred and eighteen (42.4 %) female and 6 (42.9 %) male skaters had suffered from acute injuries during their synchronized skating career. As some skaters had suffered from more than one injury, the total number of acute injuries in females was 398 and in males 14. In female skaters 19.8 % of acute injuries were head injuries, 7.1 % trunk, 33.2 % upper, and 39.9 % lower extremity injuries. In male skaters 14.3 % were head injuries, 28.6 % upper, and 57.1 % lower extremity injuries, with no report of trunk injuries. Sixty-nine female and 2 male skaters had low back problems and 112 female and 2 male skaters had one or more overuse syndromes during their skating career. Of 155 overuse injuries in female skaters, 102 (65.8 %) occurred during their figure skating career, while 53 injuries (34.2 %) only occurred when they skated in synchronized skating teams. In male skaters, out of 5 overuse injuries, 4 (80 %) occurred in their figure skating career, while 1 (20 %) occurred during their synchronized skating career. Out of the total of 412 injuries, 338 (82 %) occurred during on-ice practice, while 74 (18 %) happened during off-ice training. Ninety-one (26.9 %) acute injures occurred while practicing individual elements, and 247 (73.1 %) on-ice injuries occurred while practicing different team elements. We conclude that injuries in synchronized skating should be of medical concern due to an increasing number of acute injuries, especially those that go beyond the soft tissue and include head injuries and fractures. We feel that these more significant injuries MAY TO SOME EXTENT BE attributable to the increasing physical demands and technical difficulty required of the teams now participating in a more competitive environment over the last four years.
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Affiliation(s)
- S Dubravcic-Simunjak
- Department of Physical Medicine and Rehabilitation, General Hospital Sveti Duh, Zagreb, Croatia.
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Abstract
BACKGROUND Femoral shaft stress fractures in athletes are not common but pose a great diagnostic challenge to clinicians. Because of few clinical signs, diagnosis and treatment are often delayed. Furthermore, if not treated correctly, these fractures are well known for complications and difficulties. OBJECTIVE To develop a well structured and reproducible treatment algorithm for athletes with femoral shaft stress fractures. METHODS The proposed algorithm is carried out in four phases, each lasting three weeks, and the move to the next phase is based on the result of the tests carried out at the end of the previous phase. Over nine years, we treated seven top level athletes, aged 17-21. In all athletes, diagnosis was based on physical examination, plain radiographs, and bone scan. RESULTS As a result of the treatment method, all the athletes were fully engaged in athletic activity 12-18 weeks after the beginning of treatment. After completion of the treatment, the athletes were followed up for 48-96 months. During the follow up, there was no recurrence of discomfort or pain, and all the athletes eventually returned to competition level. CONCLUSION These results and data available from the literature suggest that the algorithm is the optimal treatment protocol for femoral shaft stress fractures in athletes, avoiding the common complications and difficulties.
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Affiliation(s)
- A Ivkovic
- Medical School, University of Zagreb, Zagreb, Croatia.
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Bilic R, Simic P, Jelic M, Stern-Padovan R, Dodig D, van Meerdervoort HP, Martinovic S, Ivankovic D, Pecina M, Vukicevic S. Osteogenic protein-1 (BMP-7) accelerates healing of scaphoid non-union with proximal pole sclerosis. Int Orthop 2006; 30:128-34. [PMID: 16506027 PMCID: PMC2532081 DOI: 10.1007/s00264-005-0045-z] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2005] [Revised: 11/07/2005] [Accepted: 11/17/2005] [Indexed: 01/14/2023]
Abstract
We randomly assigned 17 patients with scaphoid non-union at the proximal pole to three treatment groups: (1) autologous iliac graft (n=6), (2) autologous iliac graft + osteogenic protein-1 (OP-1; n=6), and (3) allogenic iliac graft + OP-1 (n=5). Radiographic, scintigraphic, and clinical assessments were performed throughout the follow-up period of 24 months. OP-1 improved the performance of both autologous and allogenic bone implants and reduced radiographic healing time to 4 weeks compared with 9 weeks in group 1. Helical CT scans and scintigraphy showed that in OP-1-treated patients sclerotic bone was replaced by well-vascularised bone. The addition of OP-1 to allogenic bone implant equalised the clinical outcome with the autologous graft procedure. Consequently the harvesting of autologous graft can be avoided.
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Affiliation(s)
- R. Bilic
- Department of Orthopedic Surgery, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - P. Simic
- Laboratory for Mineralized Tissues, Department of Anatomy, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - M. Jelic
- Department of Orthopedic Surgery, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
- Laboratory for Mineralized Tissues, Department of Anatomy, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - R. Stern-Padovan
- Department of Radiology, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - D. Dodig
- Department of Nuclear Medicine, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | | | - S. Martinovic
- Laboratory for Mineralized Tissues, Department of Anatomy, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - D. Ivankovic
- Department of Medical Statistics, Epidemiology and Medical Informatics, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - M. Pecina
- Department of Orthopedic Surgery, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
| | - S. Vukicevic
- Laboratory for Mineralized Tissues, Department of Anatomy, School of Medicine, University of Zagreb, Salata 11, 10000 Zagreb, Croatia
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Vukicevic S, Pecina M. Glyn O. Phillips (ed): Bone morphogenetic protein and collagen. International Orthopaedics (SICOT) 2004. [DOI: 10.1007/s00264-004-0591-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Djapic T, Kusec V, Jelic M, Vukicevic S, Pecina M. Compressed homologous cancellous bone and bone morphogenetic protein (BMP)-7 or bone marrow accelerate healing of long-bone critical defects. Int Orthop 2003; 27:326-30. [PMID: 12942195 PMCID: PMC3461884 DOI: 10.1007/s00264-003-0496-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/26/2003] [Indexed: 10/26/2022]
Abstract
We studied 18 adult male New Zealand rabbits with a critical right-sided ulnar defect of 15 mm. In six animals the defect was grafted with homologous compressed cancellous bone, in six animals with homologous compressed cancellous bone including 300 micro g bone morphogenetic protein (BMP)-7 and in six animals with homologous compressed cancellous bone including 0.5 ml autologous bone marrow. The defect was studied using radiographs every second week for 10 weeks. At the conclusion of the experiment the animals were killed and the defect studied by histology and histomorphometry. In all animals treated with the addition of autologous bone marrow and in five of six animals treated with the addition of BMP-7, the defect healed. There was no union in animals treated with homologous compressed cancellous bone without additive. The histological picture of the regenerated area was similar in the two experimental groups. Woven bone contained small marrow spaces with fibrous tissue and capillaries. The osteoid seams were on average greater in animals that received autologous bone marrow as compared to animals that received BMP-7.
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Affiliation(s)
- T. Djapic
- Department of Orthopaedic Surgery, School of Medicine, University of Zagreb, Salata 7, 10 000 Zagreb, Croatia
| | - V. Kusec
- Clinical Institute of Laboratory Diagnosis, Clinical Hospital Centre, Zagreb, Croatia
| | - M. Jelic
- Department of Orthopaedic Surgery, School of Medicine, University of Zagreb, Salata 7, 10 000 Zagreb, Croatia
- Department of Anatomy, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - S. Vukicevic
- Department of Anatomy, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - M. Pecina
- Department of Orthopaedic Surgery, School of Medicine, University of Zagreb, Salata 7, 10 000 Zagreb, Croatia
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Pecina M, Haspl M, Jelic M, Vukicevic S. Repair of a resistant tibial non-union with a recombinant bone morphogenetic protein-7 (rh-BMP-7). Int Orthop 2003; 27:320-1. [PMID: 12811524 PMCID: PMC3461861 DOI: 10.1007/s00264-003-0475-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/14/2003] [Indexed: 11/27/2022]
Affiliation(s)
- M. Pecina
- Department of Orthopaedic Surgery, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - M. Haspl
- Department of Orthopaedic Surgery, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - M. Jelic
- Department of Orthopaedic Surgery, School of Medicine, University of Zagreb, Zagreb, Croatia
- Department of Anatomy, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - S. Vukicevic
- Department of Anatomy, School of Medicine, University of Zagreb, Zagreb, Croatia
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Pecina M, Jelic M, Martinovic S, Haspl M, Vukicevic S. Articular cartilage repair: the role of bone morphogenetic proteins. Int Orthop 2002; 26:131-6. [PMID: 12073102 PMCID: PMC3620880 DOI: 10.1007/s00264-002-0338-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/04/2002] [Indexed: 11/24/2022]
Affiliation(s)
- M Pecina
- Department of Orthopaedic Surgery, School of Medicine, University of Zagreb, Salata 7, 10000 Zagreb, Croatia.
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Affiliation(s)
- M Pecina
- Department of Orthopaedic Surgery, School of Medicine, University of Zagreb, Salata 7, 10000 Zagreb, Croatia
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Pecina M. Who really first described and explained the suprascapular nerve entrapment syndrome? J Bone Joint Surg Am 2001; 83:1273-4. [PMID: 11507137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Kovac V, Puljiz A, Smerdelj M, Pecina M. Scoliosis curve correction, thoracic volume changes, and thoracic diameters in scoliotic patients after anterior and after posterior instrumentation. Int Orthop 2001; 25:66-9. [PMID: 11409453 PMCID: PMC3620632 DOI: 10.1007/s002640100233] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Thoracic volume was calculated in 50 adolescent patients operated on for severe idiopathic thoracic scoliosis. In 25, anterior instrumentation was used (group 1), and posterior instrumentation in the other 25 patients (group 2). Calculation of thoracic volume was made from measurements of pre-operative and post-operative radiographs. The mean spinal curvature in group 1 was 73+/-12.4 degrees before the operation, and 19+/-15 degrees after the operation, and in group 2 the curvature was 75+/-13 degrees before the operation and 37+/-10 degrees after the operation. The calculated thoracic volume in the group with anterior instrumentation increased from 5234 ml pre-operatively to 6043 ml post-operatively, while with posterior instrumentation it increased from 5155 ml to 5489 ml. The correlation between the change in the Cobb angle and the thoracic volume change was poor for both groups. To determine the role in the thoracic volume increase of the frontal, sagittal and vertical thoracic diameters, further correlation tests were made between these and the thoracic volume increase in each diameter. The best correlation was found between the frontal and vertical increase of diameters in group 1, whereas in group 2 the best correlation was found between the volume increase and the sagittal parameters.
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Affiliation(s)
- V Kovac
- Department of Orthopaedic Surgery, Dubrava University Hospital, Zagreb, Croatia.
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Jelic M, Pecina M, Haspl M, Kos J, Taylor K, Maticic D, McCartney J, Yin S, Rueger D, Vukicevic S. Regeneration of articular cartilage chondral defects by osteogenic protein-1 (bone morphogenetic protein-7) in sheep. Growth Factors 2001; 19:101-13. [PMID: 11769970 DOI: 10.3109/08977190109001079] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The efficacy of osteogenic protein-1 (OP-1; BMP-7) in regeneration of articular cartilage was examined by creating knee chondral defects in sheep. With a specially designed instrument in both knees, two 10 mm (diameter) chondral defects were created: one in the trochlea and the other on the femoral condyle. The recombinant BMP was delivered via an extra-articulary positioned mini-osmotic pump, which was fixed to the femoral diaphysis above the knee joint, and connected by a polyethylene tubing to the articular space. Prior to use, the compatibility of OP-1 with mini-osmotic pumps was tested in vitro by measuring aggregation/precipitation and modification of the released protein by size exclusion and reversed phase HPLC. The average amount of aggregation was 15% and about 5% of OP-1 was modified. However, the biological activity of OP-1 released from pumps over a period of 2 weeks at 37 degrees C was equal to ROS cell assay OP-1 standard. Following surgery, a total of 55 microg (low dose) or 170 microg (high dose) OP-1 in acetate buffer (pH 4.5) was slowly released from the pump over a period of 2 weeks. The pumps connected to control knees were filled with acetate buffer as a vehicle. Twelve animals were operated, six of which were treated with the low OP-1 dose, and six with the high OP-1 dose. Three sheep of each group were killed either at 3 or 6 months following surgery, based on arthroscopical evaluation. The chondral defects in the control knees remained empty during the observation period. At 3 months following surgery, defects treated with both OP-1 doses were filled with connective tissue and cartilage. At 6 months following surgery, both doses of OP-1 stimulated regeneration in treated knees. The boundaries between new and old cartilage were well fused and mechanically resisted animals' weight bearing. The regenerated cartilage was rich in proteoglycans and type II collagen, as demonstrated by toluidine blue staining and immunohistochemistry. No signs of endochondral bone formation above the bony tidemark were observed. We suggest that a recombinant bone morphogenctic protein stimulates ingrowth of mesenchymal cells into the chondral defects which then transform into newly formed articular cartilage-like tissue.
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Affiliation(s)
- M Jelic
- Department of Anatomy, School of Medicine, University of Zagreb, Croatia
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