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  1. Article ; Online: Hypergravity Increases Blood-Brain Barrier Permeability to Fluorescent Dextran and Antisense Oligonucleotide in Mice.

    Dubayle, David / Vanden-Bossche, Arnaud / Peixoto, Tom / Morel, Jean-Luc

    Cells

    2023  Volume 12, Issue 5

    Abstract: The earliest effect of spaceflight is an alteration in vestibular function due to microgravity. Hypergravity exposure induced by centrifugation is also able to provoke motion sickness. The blood-brain barrier (BBB) is the crucial interface between the ... ...

    Abstract The earliest effect of spaceflight is an alteration in vestibular function due to microgravity. Hypergravity exposure induced by centrifugation is also able to provoke motion sickness. The blood-brain barrier (BBB) is the crucial interface between the vascular system and the brain to ensure efficient neuronal activity. We developed experimental protocols of hypergravity on C57Bl/6JRJ mice to induce motion sickness and reveal its effects on the BBB. Mice were centrifuged at 2×
    MeSH term(s) Mice ; Animals ; Blood-Brain Barrier/metabolism ; Dextrans/pharmacology ; Oligonucleotides, Antisense ; Endothelial Cells/metabolism ; Hypergravity ; Coloring Agents ; Permeability ; Motion Sickness/metabolism
    Chemical Substances Dextrans ; Oligonucleotides, Antisense ; Coloring Agents
    Language English
    Publishing date 2023-02-24
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2661518-6
    ISSN 2073-4409 ; 2073-4409
    ISSN (online) 2073-4409
    ISSN 2073-4409
    DOI 10.3390/cells12050734
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Novel Insights Into the Intratendinous Pressure Behavior of the Achilles Tendon in Athletes.

    Pringels, Lauren / Van Acker, Gilles / Wezenbeek, Evi / Burssens, Arne / Vanden Bossche, Luc

    Sports health

    2024  , Page(s) 19417381241245357

    Abstract: Background: In contrast to other musculoskeletal tissues, the normal pressure behavior of the Achilles tendon is poorly understood. This study aimed to explore the normal intratendinous and perfusion pressures of the Achilles tendon at rest and during ... ...

    Abstract Background: In contrast to other musculoskeletal tissues, the normal pressure behavior of the Achilles tendon is poorly understood. This study aimed to explore the normal intratendinous and perfusion pressures of the Achilles tendon at rest and during exercise, and investigate potential correlations with tendon load and morphology.
    Hypothesis: Intratendinous and perfusion pressures of the Achilles tendon exhibit similarities to other musculoskeletal tissues and depend on tendon load and morphology.
    Study design: Observational study.
    Level of evidence: Level 3.
    Methods: A total of 22 recreational athletes were enrolled. Demographics, activity level, and blood pressures were recorded. Achilles tendon thickness and echogenicity were assessed 25 mm proximal to the posterosuperior calcaneal border. In this region, intratendinous and perfusion pressures of the Achilles tendon were measured at rest and during isometric plantarflexion up to 50 N, using the microcapillary infusion technique. Linear mixed models were used to investigate the effects of plantarflexion force, tendon thickness, and echogenicity on intratendinous and perfusion pressures.
    Results: At rest, intratendinous and perfusion pressures of the Achilles tendon were 43.8 ± 15.2 and 48.7 ± 18.4 mmHg, respectively. Intratendinous pressure increased linearly with plantarflexion force, reaching 101.3 ± 25.5 mmHg at 50 N (P < 0.01). Perfusion pressure showed an inverse relationship, dropping below 0 mmHg at 50 N (P < 0.01). Neither intratendinous nor perfusion pressures of the Achilles tendon correlated with tendon thickness or echogenicity.
    Conclusion: The normal intratendinous resting pressure of the Achilles tendon is higher than other musculoskeletal tissues, making it more susceptible to ischemia. During exercise, intratendinous pressure increases significantly to a level that lowers perfusion pressure, thereby compromising blood supply at already low plantarflexion forces.
    Clinical relevance: Given the potential role of ischemia in Achilles tendinopathy, our findings caution against intratendinous injections, as they may exacerbate high intratendinous resting pressure, and against prolonged postexercise tendon stretching, as the associated rise in intratendinous pressure may impair the required hyperemic response.
    Language English
    Publishing date 2024-04-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2508802-6
    ISSN 1941-0921 ; 1941-7381
    ISSN (online) 1941-0921
    ISSN 1941-7381
    DOI 10.1177/19417381241245357
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Three-Dimensional Upper Limb Movement Analysis in Children and Adolescents With Brachial Plexus Birth Injury: A Systematic Review.

    Le Roy, Laura / van Bladel, Anke / De Mits, Sophie / Vanden Bossche, Luc / Van der Looven, Ruth

    Pediatric neurology

    2024  Volume 153, Page(s) 19–33

    Abstract: Background: To synthesize the current evidence on clinical use of three-dimensional upper limb movement analysis (3D-ULMA) in children and adolescents with brachial plexus birth injury (BPBI).: Methods: MEDLINE, Embase, and Web of Science were ... ...

    Abstract Background: To synthesize the current evidence on clinical use of three-dimensional upper limb movement analysis (3D-ULMA) in children and adolescents with brachial plexus birth injury (BPBI).
    Methods: MEDLINE, Embase, and Web of Science were searched for relevant studies up to April 2022. An automatic e-mail alert was installed to ensure no eligible article was missed. Articles evaluating 3D-ULMA in children and adolescents with BPBI were included. Covidence web-based platform was used for blind screening of eligible articles. Twenty-one observational studies with a final sample size of 609, encompassing 493 BPBI cases, met the inclusion criteria. Data were extracted using a custom form to support standardized extraction conforming to the Cochrane Checklist of items. Risk of bias was assessed using the Newcastle-Ottawa Scale, the Strengthening the Reporting of Observational Studies in Epidemiology checklist, and a specifically established quality assessment form for kinematic analysis studies.
    Results: Study setups differed, including six different types of kinematic devices. Twelve studies used the (modified) Mallet positions for their 3D-ULMA. Throughout the studies, 3D-ULMA was used for various purposes. The Newcastle-Ottawa Scale scored 16 articles with five stars or more, indicating fair to moderate quality.
    Conclusions: This systematic review summarizes the different 3D-ULMA kinematic devices, test protocols, and their clinical use for BPBI. The use of 3D-ULMA provides valuable, objective, and quantified data to clinicians with regard to movement strategies; it complements existing clinical scales and can be implemented to evaluate effectiveness of therapy interventions. Implications for future research and clinical practice are discussed.
    MeSH term(s) Child ; Humans ; Adolescent ; Brachial Plexus ; Upper Extremity ; Brachial Plexus Neuropathies ; Biomechanical Phenomena ; Birth Injuries
    Language English
    Publishing date 2024-01-01
    Publishing country United States
    Document type Systematic Review ; Journal Article ; Review
    ZDB-ID 639164-3
    ISSN 1873-5150 ; 0887-8994
    ISSN (online) 1873-5150
    ISSN 0887-8994
    DOI 10.1016/j.pediatrneurol.2023.12.022
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: External to internal glenohumeral strength ratio in non-traumatic rotator cuff pathologies.

    Verspeelt, Peter / DE Muynck, Martine / Vanderstraeten, Guy / Vanden Bossche, Luc / Stassijns, Gaetane / Öczakar, Levent

    Acta orthopaedica Belgica

    2023  Volume 89, Issue 2, Page(s) 207–211

    Abstract: Background and study aims: A correct agonist -antagonist strength relationship for shoulder external and internal rotation is necessary for functional stability of the shoulder. This strength relationship is described by the ratio of external to ... ...

    Abstract Background and study aims: A correct agonist -antagonist strength relationship for shoulder external and internal rotation is necessary for functional stability of the shoulder. This strength relationship is described by the ratio of external to internal strength (ER/IR).The aim of this stydy is to produce comparative data as regards the ER/IR ratio in subjects with different non-traumatic rotator cuff diseases.
    Design and setting: A cross-sectional study in an outpatient clinic in a tertiary care university hospital.
    Methods: In 55 subjects with rotator cuff disease (confirmed by physical examination and assessed by ultrasound and magnetic resonance arthrography), the ER/IR ratio of the shoulder was isometrically measured with a hand-held dynamometer and compared with values pertaining to the unaffected shoulder of the same individuals.
    Results: The mean ER/IR values in the overall group were 0.89 (SD 0.18) and 0.94 (SD 0.22) for the affected and unaffected shoulders, respectively. The ratio was 0.87 (SD 0.23) in patients with subdeltoid bursitis, 0.88 (SD 0.16) in rotator cuff tendinopathy and 0.87 (SD 0.22) in patients with rotator cuff tears.
    Conclusions: The ER/IR ratio appears to be similar between the affected and unaffected shoulders of subjects with nontraumatic cuff pathologies.
    MeSH term(s) Humans ; Rotator Cuff/diagnostic imaging ; Cross-Sectional Studies ; Rotator Cuff Injuries/diagnostic imaging ; Physical Examination ; Bursitis/diagnostic imaging ; Shoulder Joint/diagnostic imaging ; Range of Motion, Articular
    Language English
    Publishing date 2023-11-04
    Publishing country Belgium
    Document type Journal Article
    ZDB-ID 210367-9
    ISSN 0001-6462 ; 1784-407X
    ISSN 0001-6462 ; 1784-407X
    DOI 10.52628/89.2.11566
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Elevated fluid and glycosaminoglycan content in the Achilles tendon contribute to higher intratendinous pressure: Implications for Achilles tendinopathy.

    Pringels, Lauren / Van Valckenborgh, Gert-Jan / Segers, Patrick / Chevalier, Amélie / Stepman, Hedwig / Wezenbeek, Evi / Burssens, Arne / Bossche, Luc Vanden

    Journal of sport and health science

    2024  

    Abstract: Background: Tendinopathy alters the compositional properties of the Achilles tendon by increasing fluid and glycosaminoglycan content. It has been speculated that these changes may affect intratendinous pressure, but the extent of this relationship ... ...

    Abstract Background: Tendinopathy alters the compositional properties of the Achilles tendon by increasing fluid and glycosaminoglycan content. It has been speculated that these changes may affect intratendinous pressure, but the extent of this relationship remains unclear. Therefore, we aimed to investigate the impact of elevated fluid and glycosaminoglycan content on Achilles tendon intratendinous pressure and to determine whether hyaluronidase (HYAL) therapy can intervene in this potential relationship.
    Methods: Twenty paired fresh-frozen cadaveric Achilles tendons were mounted in a tensile-testing machine and loaded up to 5% strain. Intratendinous resting (at 0% strain) and dynamic pressure (at 5% strain) were assessed using the microcapillary infusion technique. First, intratendinous pressure was measured under native conditions before and after infusion of 2 mL physiological saline. Next, 80 mg of glycosaminoglycans were administered bilaterally to the paired tendons. The right tendons were additionally treated with 1500 units of HYAL. Finally, both groups were retested, and the glycosaminoglycan content was analyzed.
    Results: It was found that both elevated fluid and glycosaminoglycan content resulted in higher intratendinous resting and dynamic pressures (p < 0.001). HYAL treatment induced a 2.3-fold reduction in glycosaminoglycan content (p = 0.002) and restored intratendinous pressures.
    Conclusion: The results of this study demonstrated that elevated fluid and glycosaminoglycan content in Achilles tendinopathy contribute to increased intratendinous resting and dynamic pressures, which can be explained by the associated increased volume and reduced permeability of the tendon matrix, respectively. HYAL degrades glycosaminoglycans sufficiently to lower intratendinous pressures and may, therefore, serve as a promising treatment.
    Language English
    Publishing date 2024-04-04
    Publishing country China
    Document type Journal Article
    ZDB-ID 2673028-5
    ISSN 2213-2961 ; 2095-2546
    ISSN (online) 2213-2961
    ISSN 2095-2546
    DOI 10.1016/j.jshs.2024.04.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Hypergravity Increases Blood–Brain Barrier Permeability to Fluorescent Dextran and Antisense Oligonucleotide in Mice

    David Dubayle / Arnaud Vanden-Bossche / Tom Peixoto / Jean-Luc Morel

    Cells, Vol 12, Iss 734, p

    2023  Volume 734

    Abstract: The earliest effect of spaceflight is an alteration in vestibular function due to microgravity. Hypergravity exposure induced by centrifugation is also able to provoke motion sickness. The blood–brain barrier (BBB) is the crucial interface between the ... ...

    Abstract The earliest effect of spaceflight is an alteration in vestibular function due to microgravity. Hypergravity exposure induced by centrifugation is also able to provoke motion sickness. The blood–brain barrier (BBB) is the crucial interface between the vascular system and the brain to ensure efficient neuronal activity. We developed experimental protocols of hypergravity on C57Bl/6JRJ mice to induce motion sickness and reveal its effects on the BBB. Mice were centrifuged at 2× g for 24 h. Fluorescent dextrans with different sizes (40, 70 and 150 kDa) and fluorescent antisense oligonucleotides (AS) were injected into mice retro-orbitally. The presence of fluorescent molecules was revealed by epifluorescence and confocal microscopies in brain slices. Gene expression was evaluated by RT-qPCR from brain extracts. Only the 70 kDa dextran and AS were detected in the parenchyma of several brain regions, suggesting an alteration in the BBB. Moreover, Ctnnd1, Gja4 and Actn1 were upregulated, whereas Jup, Tjp2, Gja1, Actn2, Actn4, Cdh2 and Ocln genes were downregulated, specifically suggesting a dysregulation in the tight junctions of endothelial cells forming the BBB. Our results confirm the alteration in the BBB after a short period of hypergravity exposure.
    Keywords blood–brain barrier ; permeability ; centrifugation ; hypergravity ; dextran ; antisense oligonucleotide ; Biology (General) ; QH301-705.5
    Subject code 616
    Language English
    Publishing date 2023-02-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Managing pain and inflammation associated with musculoskeletal disease: time for a change?

    Wolfarth, Bernd / Speed, Cathy / Raymuev, Kirill / Vanden Bossche, Luc / Migliore, Alberto

    Current medical research and opinion

    2022  Volume 38, Issue 10, Page(s) 1695–1701

    MeSH term(s) Humans ; Inflammation/complications ; Musculoskeletal Diseases/complications ; Musculoskeletal Diseases/therapy ; Musculoskeletal Pain/therapy ; Pain/drug therapy ; Pain Management
    Language English
    Publishing date 2022-08-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 80296-7
    ISSN 1473-4877 ; 0300-7995
    ISSN (online) 1473-4877
    ISSN 0300-7995
    DOI 10.1080/03007995.2022.2108618
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: ULTRASONOGRAPHIC PRESENTATION OF NODULAR CYSTIC FAT NECROSIS AFTER A LOW-VELOCITY TRAUMA: A CASE REPORT.

    de Wilde, Robin / Hautekiet, Arne / Geers, Sybille / Vanden Bossche, Luc / de Muynck, Martine

    Journal of rehabilitation medicine. Clinical communications

    2022  Volume 5, Page(s) 2237

    Abstract: Objective: Morel-Lavallée lesion is a well-known entity after a high-energy, shearing trauma. Another form of lesion in the subcutaneous tissue is fat necrosis, presenting as a palpable mass. The most common presentation of fat necrosis is oil cysts, ... ...

    Abstract Objective: Morel-Lavallée lesion is a well-known entity after a high-energy, shearing trauma. Another form of lesion in the subcutaneous tissue is fat necrosis, presenting as a palpable mass. The most common presentation of fat necrosis is oil cysts, which occur mainly in the breast. However, in the lower extremities fat necrosis appears as nodular cystic fat necrosis. We report here a case of a patient with multiple injuries after a low-velocity trauma, who developed fat necrosis.
    Results: Six months after the traumatic event the patient reported multiple subcutaneous lumps on the right knee. On ultrasonography, the probable diagnosis of post-traumatic fat necrosis with consequent development of nodular cystic fat necrosis was seen. The diagnosis was confirmed based on magnetic resonance imaging (MRI).
    Discussion: Fat necrosis should be included in the differential diagnosis in cases of tissue injuries after a trauma. Fat necrosis can present months or years after the initial injury. It is a benign entity and is the result of an organized haemorrhage, swelling and oedema that progresses with fibrosis. There is no absolute need for surgical treatment.
    Language English
    Publishing date 2022-09-22
    Publishing country Sweden
    Document type Case Reports
    ISSN 2003-0711
    ISSN (online) 2003-0711
    DOI 10.2340/jrmcc.v5.2237
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Exploring the role of intratendinous pressure in the pathogenesis of tendon pathology: a narrative review and conceptual framework.

    Pringels, Lauren / Cook, Jill L / Witvrouw, Erik / Burssens, Arne / Vanden Bossche, Luc / Wezenbeek, Evi

    British journal of sports medicine

    2022  Volume 57, Issue 16, Page(s) 1042–1048

    Abstract: Despite the high prevalence of tendon pathology in athletes, the underlying pathogenesis is still poorly understood. Various aetiological theories have been presented and rejected in the past, but the tendon cell response model still holds true. This ... ...

    Abstract Despite the high prevalence of tendon pathology in athletes, the underlying pathogenesis is still poorly understood. Various aetiological theories have been presented and rejected in the past, but the tendon cell response model still holds true. This model describes how the tendon cell is the key regulator of the extracellular matrix and how pathology is induced by a failed adaptation to a disturbance of tissue homeostasis. Such failure has been attributed to various kinds of stressors (eg, mechanical, thermal and ischaemic), but crucial elements seem to be missing to fully understand the pathogenesis. Importantly, a disturbance of tissue pressure homeostasis has not yet been considered a possible factor, despite it being associated with numerous pathologies. Therefore, we conducted an extensive narrative literature review on the possible role of intratendinous pressure in the pathogenesis of tendon pathology. This review explores the current understanding of pressure dynamics and the role of tissue pressure in the pathogenesis of other disorders with structural similarities to tendons. By bridging these insights with known structural changes that occur in tendon pathology, a conceptual model was constituted. This model provides an overview of the possible mechanism of how an increase in intratendinous pressure might be involved in the development and progression of tendon pathology and contribute to tendon pain. In addition, some therapies that could reduce intratendinous pressure and accelerate tendon healing are proposed. Further experimental research is encouraged to investigate our hypotheses and to initiate debate on the relevance of intratendinous pressure in tendon pathology.
    MeSH term(s) Humans ; Tendinopathy/etiology ; Tendinopathy/pathology ; Tendons ; Wound Healing ; Adaptation, Physiological ; Athletes ; Achilles Tendon/pathology
    Language English
    Publishing date 2022-11-02
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 600592-5
    ISSN 1473-0480 ; 0306-3674
    ISSN (online) 1473-0480
    ISSN 0306-3674
    DOI 10.1136/bjsports-2022-106066
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Intratendinous pressure of the Achilles tendon during exercise is related to the degree of tendon torsion.

    Pringels, Lauren / Stouthandel, Michael / Van Hoof, Tom / Martens, Manuel / Chevalier, Amelie / Burssens, Arne / Wezenbeek, Evi / Vanden Bossche, Luc

    Scandinavian journal of medicine & science in sports

    2023  Volume 33, Issue 11, Page(s) 2230–2238

    Abstract: Torsion of the Achilles tendon (AT) enhances tensile strength, but a high degree of torsion might also be a risk factor for Achilles tendinopathy, due to greater internal compression exerted during tensile loading. However, evidence supporting the ... ...

    Abstract Torsion of the Achilles tendon (AT) enhances tensile strength, but a high degree of torsion might also be a risk factor for Achilles tendinopathy, due to greater internal compression exerted during tensile loading. However, evidence supporting the grounds for this assumption is lacking. Hence, we aimed to investigate the impact of AT torsion type on intratendinous pressure. Eighteen human fresh frozen cadaveric legs were mounted in a testing rig and a miniature pressure catheter was placed through ultrasound-guided insertion in the midportion region of the AT. Intratendinous pressure was measured during a simulated straight-knee calf stretch and eccentric heel drop. The AT was then carefully dissected and classified into Type I (least), Type II (moderate), and Type III (extreme) torsion. Of the ATs examined, nine were found to have Type I torsion (50%), nine Type II (50%), and none Type III. It was found that the intratendinous pressure of the AT increased exponentially with ankle dorsiflexion during both exercises (p < 0.001) and that this increase was greater in ATs with Type II torsion than Type I torsion (p < 0.05). This study provides the first biomechanical data to support the hypothesis that in athletes with a high degree of torsion in the AT, the midportion area will experience more internal compression during exercise, for example, calf stretching and eccentric heel drops. Whether this phenomenon is also associated with an elevated risk for Achilles tendinopathy needs further prospective investigation.
    Language English
    Publishing date 2023-08-22
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 1077418-x
    ISSN 1600-0838 ; 0905-7188
    ISSN (online) 1600-0838
    ISSN 0905-7188
    DOI 10.1111/sms.14467
    Database MEDical Literature Analysis and Retrieval System OnLINE

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