References of "FOIDART, Jean-Michel"
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See detailImpact of follicular G-CSF quantification on subsequent embryo transfer decisions: a proof of concept study.
Ledee, N.; Gridelet, Virginie ULg; RAVET, Stéphanie ULg et al

in Human Reproduction (2013), 28(2), 406-13

BACKGROUND: Previous experiments have shown that granulocyte colony-stimulating factor (G-CSF), quantified in the follicular fluid (FF) of individual oocytes, correlates with the potential for an ongoing ... [more ▼]

BACKGROUND: Previous experiments have shown that granulocyte colony-stimulating factor (G-CSF), quantified in the follicular fluid (FF) of individual oocytes, correlates with the potential for an ongoing pregnancy of the corresponding fertilized oocytes among selected transferred embryos. Here we present a proof of concept study aimed at evaluating the impact of including FF G-CSF quantification in the embryo transfer decisions. METHODS: FF G-CSF was quantified with the Luminex XMap technology in 523 individual FF samples corresponding to 116 fresh transferred embryos, 275 frozen embryos and 131 destroyed embryos from 78 patients undergoing ICSI. RESULTS: Follicular G-CSF was highly predictive of subsequent implantation. The receiving operator characteristics curve methodology showed its higher discriminatory power to predict ongoing pregnancy in multivariate logistic regression analysis for FF G-CSF compared with embryo morphology [0.77 (0.69-0.83), P < 0.001 versus 0.66 (0.58-0.73), P = 0.01)]. Embryos were classified by their FF G-CSF concentration: Class I over 30 pg/ml (a highest positive predictive value for implantation), Class II from 30 to 18.4 pg/ml and Class III <18.4 pg/ml (a highest negative predictive value). Embryos derived from Class I follicles had a significantly higher implantation rate (IR) than those from Class II and III follicles (36 versus 16.6 and 6%, P < 0.001). Embryos derived from Class I follicles with an optimal morphology reached an IR of 54%. Frozen-thawed embryos transfer derived from Class I follicles had an IR of 37% significantly higher than those from Class II and III follicles, respectively, of 8 and 5% (P < 0.001). Thirty-five per cent of the frozen embryos but also 10% of the destroyed embryos were derived from G-CSF Class I follicles. Non-optimal embryos appear to have been transferred in 28% (22/78) of the women, and their pregnancy rate was significantly lower than that of women who received at least one optimal embryo (18 versus 36%, P = 0.04). CONCLUSIONS: Monitoring FF G-CSF for the selection of embryos with a better potential for pregnancy might improve the effectiveness of IVF by reducing the time and cost required for obtaining a pregnancy. [less ▲]

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See detailIsoform 111 of vascular endothelial growth factor (VEGF111) improves angiogenesis of ovarian tissue xenotransplantation
Labied, Soraya ULg; Delforge, Yves ULg; Munaut, Carine ULg et al

in Transplantation (2013), 95(3), 426-433

Background: Cryopreservation of cortex ovarian tissue before anti-cancer therapy is a promising technique for fertility preservation mainly in children and young women. Ischemia in the early stage after ... [more ▼]

Background: Cryopreservation of cortex ovarian tissue before anti-cancer therapy is a promising technique for fertility preservation mainly in children and young women. Ischemia in the early stage after ovarian graft causes massive follicle loss by apoptosis. VEGF111 is a recently described VEGF isoform that does not bind to the extracellular matrix, diffuse extensively and is resistant to proteolysis. These properties confer a significantly higher angiogenic potential to VEGF111 in comparison to the other VEGF isoforms. Methods: We evaluated the morphology of cryopreserved sheep ovarian cortex, grafted in the presence or absence of VEGF111. Ovarian cortex biopsies were embedded in type I collagen with or without VEGF111 addition before transplantation to SCID mice ovaries. Transplants were retrieved 3 days or 3 weeks later. Follicular density, vasculature network, haemoglobin content and cell proliferation were analysed. Results: Addition of VEGF111 increased density of functional capillaries (p=0.01) 3 days after grafting. By double immunostaining of Ki-67 and von Willebrand Factor (vWF) we demonstrated that proliferating endothelial cells were found in 83% of the VEGF111 group when compared to 33% in the control group (p=0.001). This angio-stimulation was associated with a significant enhancement of haemoglobin content (p=0.03). Three weeks after transplantation, the number of primary follicles was significantly higher in VEGF111 grafts (p=0.02). Conclusion: VEGF111 accelerates blood vessels recruitment, functional angiogenesis and improves the viability of ovarian cortex by limiting ischemia and ovarian cortex damage. [less ▲]

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See detailExpression et localisation spatio-temporelle de KISS1 et de son récepteur KISSR dans le placenta normal et pathologique.
VALDES SOCIN, Hernan Gonzalo ULg; Munaut, Carine ULg; CHAVEZ, Viviana ULg et al

Poster (2012, October)

Objectif : Etudier l’expression de KISS1 (métastatine) et de son récepteur KISS1R lors de la grossesse normale et pathologique. Matériels et méthodes : Nous avons étudié la localisation de KISS1 et KISS1R ... [more ▼]

Objectif : Etudier l’expression de KISS1 (métastatine) et de son récepteur KISS1R lors de la grossesse normale et pathologique. Matériels et méthodes : Nous avons étudié la localisation de KISS1 et KISS1R par immunohistochimie dans des placentas normaux (1 er et 3 ème trimestre). Par RT-PCR quantitative, nous avons évalué le niveau d’expression des ARNm dans les placentas et les lits placentaires correspondants. Les niveaux d’expression de ARNm ont été comparés entre les grossesses normales (GN, n=13) et les grossesses spathologiques Prééclampsiques -PE-, n=17 et retard de croissance intrautérine -RCIU-, n=9). Résultats : Au premier trimestre des GN, KISS1 est majoritairement localisé dans les syncitiotrophoblastes, alors que KISS1R est détecté dans le mesenchyme villositaire. Au cours du troisième trimestre, KISS1 est uniquement localisé dans le syncitiotrophoblaste au contact avec la décidue et dans le mésenchyme villositaire et KISS1R est détecté dans le trophoblaste extra-villeux ainsi que dans quelques cellules de la décidue. Les analyses par RT-PCR mettent en évidence une expression plus importante des ARNm de KISS1 (p<0,001) et de KISS1R (p=0.039) dans les placentas (GN,PE et RCIU) par rapport aux lits placentaires correspondants. Les niveaux d’expression de KISS1 et KISS1R ne sont pas, cependant, significativement modulés dans les grossesses pathologiques. Conclusions : Par immunohistochimie, nos résultats indiquent une expression spatiotemporelle différente pour KISS1 et KISS1R entre le 1 er et 3 ème trimestre des grossesses normales. Nous n’avons pas mis en évidence de modulation de l’expression des ARNm dans les grossesses pathologiques. [less ▲]

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See detailImplant comprising a core and a tube encasing the core
Donnez, Jacques; Van Langendonkt, Anne; Defrère, Sylvie et al

Patent (2012)

The present invention relates to an implant comprising: - a core material comprising polydimethylsiloxane or at least one hydrogel polymer; - a tube encasing said core material comprising an ethylene ... [more ▼]

The present invention relates to an implant comprising: - a core material comprising polydimethylsiloxane or at least one hydrogel polymer; - a tube encasing said core material comprising an ethylene vinyl acetate polymer or at least one hydrogel polymer; - a sealant for closure of the open ends of said tube comprising polydimethylsiloxane or a mono-, di-, or triacetoxy derivative thereof, or at least one hydrogel polymer; and - at least one active ingredient; wherein said at least one active ingredient is selected from the group comprising celecoxib, sulindac, tamoxifen, oestrogen, oestradiol, ethinyl oestradiol, mestranol, dienogest, norgestrel, levonorgestrel, desogestrel, norgestimate, ethynodiol diacetate, leuprorelin, buserelin, gonrelin, triptorelin, nafarelin, deslorelin, histrelin, and supprelin; and with the proviso that when the sealant is said at least one hydrogelpolymer, the core material comprises polydimethylsiloxane. Furthermore, the invention relates to an implant for use as a medicament. In particular, the invention relates to an implant for use in the treatment of endometriosis. [less ▲]

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See detailImplant comprising a core and a tube encasing the core
Donnez, Jacques; Van Langendonkt, Anne; Defrère, Stéphanie et al

Patent (2012)

The present invention relates to an implant comprising: - a core material comprising polydimethylsiloxane or at least one hydrogel polymer; - a tube encasing said core material comprising an ethylene ... [more ▼]

The present invention relates to an implant comprising: - a core material comprising polydimethylsiloxane or at least one hydrogel polymer; - a tube encasing said core material comprising an ethylene vinyl acetate polymer or at least one hydrogel polymer; - a sealant for closure of the open ends of said tube comprising polydimethylsiloxane or a mono-, di-, or triacetoxy derivative thereof, or at least one hydrogel polymer; and - at least one active ingredient; with the proviso that when the sealant is said at least one hydrogel polymer, the core material comprises polydimethylsiloxane. Furthermore, the invention relates to an implant for use as a medicament. In particular, the invention relates to an implant for use in the treatment of endometriosis. [less ▲]

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See detailMatrix metalloproteinase-2 governs lymphatic vessel formation as an interstitial collagenase.
Detry, Benoît ULg; Erpicum, Charlotte ULg; Paupert, Jenny ULg et al

in Blood (2012), 119(21), 5048-56

Lymphatic dysfunctions are associated with several human diseases, including lymphedema and metastatic spread of cancer. Although it is well recognized that lymphatic capillaries attach directly to ... [more ▼]

Lymphatic dysfunctions are associated with several human diseases, including lymphedema and metastatic spread of cancer. Although it is well recognized that lymphatic capillaries attach directly to interstitial matrix mainly composed of fibrillar type I collagen, the interactions occurring between lymphatics and their surrounding matrix have been overlooked. In this study, we demonstrate how matrix metalloproteinase (MMP)–2 drives lymphatic morphogenesis through Mmp2-gene ablation in mice, mmp2 knockdown in zebrafish and in 3D-culture systems, and through MMP2 inhibition. In all models used in vivo (3 murine models and thoracic duct development in zebrafish) and in vitro (lymphatic ring and spheroid assays), MMP2 blockage or down-regulation leads to reduced lymphangiogenesis or altered vessel branching. Our data show that lymphatic endothelial cell (LEC) migration through collagen fibers is affected by physical matrix constraints (matrix composition, density and cross-linking). Transmission electron microscopy (TEM) and confocal reflection microscopy using DQ-collagen highlight the contribution of MMP2 to mesenchymal-like migration of LEC associated with collagen fiber remodeling. Our findings provide new mechanistic insight into how LEC negotiate an interstitial type I collagen barrier and reveal an unexpected MMP2-driven collagenolytic pathway for lymphatic vessel formation and morphogenesis. [less ▲]

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See detailThe actors of human implantation: gametes, embryo and endometrium
Gridelet, Virginie ULg; GASPARD, Olivier ULg; Polese, Barbara ULg et al

in Violin Pereira, Luis Antonio (Ed.) Embryology - Updates and Highlights on Classic Topics (2012)

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See detailDifferential expression of Vegfr-2 and its soluble form in preeclampsia.
Munaut, Carine ULg; LORQUET, Sophie ULg; Pequeux, Christel ULg et al

in PLoS ONE (2012), 7(3), 33475

Background: Several studies have suggested that the main features of preeclampsia (PE) are consequences of endothelial dysfunction related to excess circulating anti-angiogenic factors, most notably ... [more ▼]

Background: Several studies have suggested that the main features of preeclampsia (PE) are consequences of endothelial dysfunction related to excess circulating anti-angiogenic factors, most notably, soluble sVEGFR-1 (also known as sFlt-1) and soluble endoglin (sEng), as well as to decreased PlGF. Recently, soluble VEGF type 2 receptor (sVEGFR-2) has emerged as a crucial regulator of lymphangiogenesis. To date, however, there is a paucity of information on the changes of VEGFR-2 that occur during the clinical onset of PE. Therefore, the aim of our study was to characterize the plasma levels of VEGFR-2 in PE patients and to perform VEGFR-2 immunolocalization in placenta. METHODOLOGY/PRINCIPAL FINDINGS: By ELISA, we observed that the VEGFR-2 plasma levels were reduced during PE compared with normal gestational age matched pregnancies, whereas the VEGFR-1 and Eng plasma levels were increased. The dramatic drop in the VEGFR-1 levels shortly after delivery confirmed its placental origin. In contrast, the plasma levels of Eng and VEGFR-2 decreased only moderately during the early postpartum period. An RT-PCR analysis showed that the relative levels of VEGFR-1, sVEGFR-1 and Eng mRNA were increased in the placentas of women with severe PE. The relative levels of VEGFR-2 mRNA as well as expressing cells, were similar in both groups. We also made the novel finding that a recently described alternatively spliced VEGFR-2 mRNA variant was present at lower relative levels in the preeclamptic placentas. CONCLUSIONS/SIGNIFICANCE: Our results indicate that the plasma levels of anti-angiogenic factors, particularly VEGFR-1 and VEGFR-2, behave in different ways after delivery. The rapid decrease in plasma VEGFR-1 levels appears to be a consequence of the delivery of the placenta. The persistent circulating levels of VEGFR-2 suggest a maternal endothelial origin of this peptide. The decreased VEGFR-2 plasma levels in preeclamptic women may serve as a marker of endothelial dysfunction. [less ▲]

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See detailMT1-MMP protects breast carcinoma cells against type I collagen-induced apoptosis
Maquoi, Erik ULg; Assent, Delphine; Detilleux, Julien et al

in Oncogene (2012), 31(4), 480-93

As invading breast carcinoma cells breach their underlying basement membrane, they become confronted with a dense three-dimensional reactive stroma dominated by type I collagen. To develop metastatic ... [more ▼]

As invading breast carcinoma cells breach their underlying basement membrane, they become confronted with a dense three-dimensional reactive stroma dominated by type I collagen. To develop metastatic capabilities, invading tumor cells must acquire the capacity to negotiate this novel microenvironment. Collagen influences the fate of epithelial cells by inducing apoptosis. However, the mechanisms used by invading tumor cells to evade collagen-induced apoptosis remain to be defined. We demonstrate that membrane type-1 matrix metalloproteinase (MT1-MMP/MMP-14) confers breast cancer cells with the ability to escape apoptosis when embedded in a collagen gel and after orthotopic implantation in vivo. In the absence of MMP-14-dependent proteolysis, type I collagen triggers apoptosis by inducing the expression of the pro-apoptotic Bcl-2-interacting killer in luminal-like breast cancer cells. These findings reveal a new mechanism whereby MMP-14 activity promotes tumor progression by circumventing apoptosis. [less ▲]

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See detailIndividual decisions in placenta increta and percreta: a case series.
CHANTRAINE, Frédéric ULg; NISOLLE, Michelle ULg; PETIT, Philippe ULg et al

in Journal of Perinatal Medicine (2012), 40(3), 265-70

Abstract Objective: Placenta increta or percreta is an uncommon pathology, sometimes associated with high maternal morbidity. Its prevalence increases proportionally to the number of cesarean sections ... [more ▼]

Abstract Objective: Placenta increta or percreta is an uncommon pathology, sometimes associated with high maternal morbidity. Its prevalence increases proportionally to the number of cesarean sections. This study analyzed the changes of our management strategy to devise treatment guidelines for this uncommon disorder. Materials and methodology: Between 2005 and 2011, 10 cases of placenta increta or percreta were managed at our university hospital maternity department. Results: Among the 10 cases, seven were diagnosed prenatally. Two patients were diagnosed early, at 14 and 17 weeks of gestational age, and their pregnancies were terminated. Five had hysterectomies during the intrapartum period, and despite attempted conservative treatment for the two others, hysterectomy proved necessary 2 months postpartum because of intrauterine infections. Seven of the 10 women had hysterectomies. Conclusion: Prenatal diagnosis of placenta increta or percreta is essential to plan the delivery in a competent tertiary care center. The decision to perform a cesarean hysterectomy or leave the placenta in situ for spontaneous delivery is based on the extent of infiltration, the patient's hemodynamic status, and her desire to remain fertile. The high-risk of infection and severe hemorrhage must not be overlooked should conservative treatment be chosen. This situation requires prolonged close monitoring. [less ▲]

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See detailAnalgésie péridurale obstétricale et lombalgie du post-partum: un lien de cause à effet?
CHARLIER, Vanessa ULg; Brichant, Géraldine ULg; DEWANDRE, Pierre-Yves ULg et al

in Revue Médicale de Liège (2012), 67(1), 16-20

backache is a common problem in the general population. the prevalence of backpain is increased during pregnancy and after delivery. early studies have suggested that labor epidural analgesia might be ... [more ▼]

backache is a common problem in the general population. the prevalence of backpain is increased during pregnancy and after delivery. early studies have suggested that labor epidural analgesia might be associated with an increased incidence of backache in the postpartum period. However, these initial studies were retrospective and their design included several methodological deficiencies. All the prospective studies published afterwards (prospective cohort studies and 3 ran- domized controlled trials) yield the same result : there is no relationship between labor epidural analgesia and long-term postpartum backpain. pregnant women must be aware of this in order to make an informed and appropriate choice about labor epidural analgesia, the most effective technique for intra- partum pain relief. [less ▲]

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See detailInsuffisance ovarienne prématurée : de la génétique à la clinique
Rege, G; Foidart, Jean-Michel ULg; NISOLLE, Michelle ULg et al

in Revue Médicale de Liège (2012), 67(7-8), 413-419

L’Insuffisance Ovarienne Prématurée (IOP) est une pathologie dont la présentation clinique est complexe. Elle survient chez 1% des femmes avant 40 ans, 0,1% avant 30 ans. Les causes sont multiples : les ... [more ▼]

L’Insuffisance Ovarienne Prématurée (IOP) est une pathologie dont la présentation clinique est complexe. Elle survient chez 1% des femmes avant 40 ans, 0,1% avant 30 ans. Les causes sont multiples : les anomalies génétiques, les maladies auto-immunes, les atteintes ovariennes iatrogènes secondaires à la chirurgie, radiothérapie, chimiothérapie, aux facteurs environnementaux tels que les virus, les toxines, le tabac, et aux facteurs métaboliques. Cependant, dans la majorité des cas, l’étiologie de l’IOP est idiopathique. [less ▲]

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See detailStromal Estrogen Receptor-α Promotes Tumor Growth by Normalizing an Increased Angiogenesis.
Pequeux, Christel ULg; Raymond-Letron, I; Blacher, Silvia ULg et al

in Cancer Research (2012), 72(12), 3010-3019

Estrogens directly promote the growth of breast cancers that express the Estrogen Receptor 􏰀 (ERalpha). However, the contribution of stromal expression of ERalpha in the tumor microenvironment to the pro ... [more ▼]

Estrogens directly promote the growth of breast cancers that express the Estrogen Receptor 􏰀 (ERalpha). However, the contribution of stromal expression of ERalpha in the tumor microenvironment to the pro-tumoral effects of estrogen has never been explored. In this study, we evaluated the molecular and cellular mechanisms by which 17beta-estradiol (E2) impacts the microenvironment and modulates tumor development of ERalpha-negative tumors. Using different mouse models of ER-negative cancer cells grafted subcutaneously into syngeneic ovariectomized immunocompetent mice, we found that E2 potentiates tumor growth, increases intratumoral vessel density and modifies tumor vasculature into a more regularly organized structure, thereby improving vessel stabilization to prevent tumor hypoxia and necrosis. These E2-induced effects were completely abrogated in ERalpha-deficient mice, demonstrating a critical role of host ERα. Notably, E2 did not accelerate tumor growth when ERalpha was deficient in Tie2- positive cells, but still expressed by bone marrow derived cells. These results were extended by clinical evidence of ERalpha-positive stromal cell labeling in the microenvironment of human breast cancers. Together, our findings therefore suggest that E2 promotes the growth of ERalpha-negative cancer cells through the activation of stromal ERα (not hematopoiteic but Tie2-dependent expression of ERalpha), which normalizes tumor angiogenesis and allows an adaptation of blood supply to tumor demand preventing hypoxia and necrosis. These findings significantly deepen mechanistic insights into the impact of E2 on tumor development with potential consequences for cancer treatment. [less ▲]

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See detailLe cas clinique du mois. Hepatite herpetique au 3eme trimestre de la grossesse.
GINER LLORET, Caroline ULg; Marotta, M-L; Vaneyck, A-S et al

in Revue Médicale de Liège (2012), 67(11), 557-9

Acute liver diseases of pregnancy are common and usually transient and reversible. Given the number of different possible diagnoses, performing a large biological screening and a proper iconographic ... [more ▼]

Acute liver diseases of pregnancy are common and usually transient and reversible. Given the number of different possible diagnoses, performing a large biological screening and a proper iconographic documentation is key. It makes sure no etiology fatal to the mother and her fetus is missed. [less ▲]

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See detailIsoform 111 of vascular endothelial growth factor (VEGF111) improves angiogenesis of ovarian tissue xenotransplantation
Labied, Soraya ULg; Delforge, Yves ULg; Blacher, Silvia ULg et al

in Journal of Assisted Reproduction & Genetics (2012), 28(11), 1009

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See detailDoes vascular endothelial growth factor improve ovarian tissue recovery after cryopreservation?
Henry, Laurie ULg; Fransolet, Maïté ULg; Labied, Soraya ULg et al

in Giornale italiano di obstetricia e gynecologia (2012)

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See detailEndométriose : pourquoi se développe-telle ?
BELIARD, Aude ULg; Foidart, Jean-Michel ULg; Nisolle, Michelle ULg

in Références en Gynécologie Obstétrique (2012), 14

Endometriosis is an estrogen-dependent disorder that can result in substantial morbidity, including multiple operations, and pelvic pain. New findings on the genetics, the possible roles of the ... [more ▼]

Endometriosis is an estrogen-dependent disorder that can result in substantial morbidity, including multiple operations, and pelvic pain. New findings on the genetics, the possible roles of the environment, the immune system, and the inflammation have given insight into the pathogenesis of this disorder and serve as the background for new treatments and new diagnostic approach. [less ▲]

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See detailControl of Allergen-Induced Inflammation and Hyperresponsiveness by the Metalloproteinase ADAMTS-12
Paulissen, Geneviève ULg; El Hour, Mehdi; Rocks, Natacha ULg et al

in Journal of Immunology (2012), 189

A disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS) constitute a family of endopeptidases related to matrix metalloproteinases. These proteinases have been largely implicated in tissue ... [more ▼]

A disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS) constitute a family of endopeptidases related to matrix metalloproteinases. These proteinases have been largely implicated in tissue remodeling associated with pathological processes. Among them, ADAMTS12 was identified as an asthma-associated gene in a human genome screening program. However, its functional implication in asthma is not yet documented. The present study aims at investigating potential ADAMTS-12 functions in experimental models of allergic airways disease. Two different in vivo protocols of allergen-induced airways disease were applied to the recently generated Adamts12-deficient mice and corresponding wild-type mice. In this study, we provide evidence for a protective effect of ADAMTS-12 against bronchial inflammation and hyperresponsiveness. In the absence of Adamts12, challenge with different allergens (OVA and house dust mite) led to exacerbated eosinophilic inflammation in the bronchoalveolar lavage fluid and in lung tissue, along with airway dysfunction assessed by increased airway responsiveness following methacholine exposure. Furthermore, mast cell counts and ST2 receptor and IL-33 levels were higher in the lungs of allergen-challenged Adamts12-deficient mice. The present study provides, to our knowledge, the first experimental evidence for a contribution of ADAMTS-12 as a key mediator in airways disease, interfering with immunological processes leading to inflammation and airway hyperresponsiveness. [less ▲]

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