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de Azambuja E, Agostinetto E, Procter M, Eiger D, Pondé N, Guillaume S, Parlier D, Lambertini M, Desmet A, Caballero C, Aguila C, Jerusalem G, Walshe JM, Frank E, Bines J, Loibl S, Piccart-Gebhart M, Ewer MS, Dent S, Plummer C, Suter T. Cardiac safety of dual anti-HER2 blockade with pertuzumab plus trastuzumab in early HER2-positive breast cancer in the APHINITY trial. ESMO Open 2023; 8:100772. [PMID: 36681013 PMCID: PMC10044361 DOI: 10.1016/j.esmoop.2022.100772] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 12/11/2022] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Trastuzumab increases the incidence of cardiac events (CEs) in patients with breast cancer (BC). Dual blockade with pertuzumab (P) and trastuzumab (T) improves BC outcomes and is the standard of care for high-risk human epidermal growth factor receptor 2 (HER2)-positive early BC patients. We analyzed the cardiac safety of P and T in the phase III APHINITY trial. PATIENTS AND METHODS Left ventricular ejection fraction (LVEF) ≥ 55% was required at study entry. LVEF assessment was carried out every 3 months during treatment, every 6 months up to month 36, and yearly up to 10 years. Primary CE was defined as heart failure class III/IV and a significant decrease in LVEF (defined as ≥10% from baseline and to <50%), or cardiac death. Secondary CE was defined as a confirmed significant decrease in LVEF, or CEs confirmed by the cardiac advisory board. RESULTS The safety analysis population consisted of 4769 patients. With 74 months of median follow-up, CEs were observed in 159 patients (3.3%): 83 (3.5%) in P + T and 76 (3.2%) in T arms, respectively. Most CEs occurred during anti-HER2 therapy (123; 77.4%) and were asymptomatic or mildly symptomatic decreases in LVEF (133; 83.6%). There were two cardiac deaths in each arm (0.1%). Cardiac risk factors indicated were age > 65 years, body mass index ≥ 25 kg/m2, baseline LVEF between 55% and <60%, and use of an anthracycline-containing chemotherapy regimen. Acute recovery from a CE based on subsequent LVEF values was observed in 127/155 patients (81.9%). CONCLUSIONS Dual blockade with P + T does not increase the risk of CEs compared with T alone. The use of anthracycline-based chemotherapy increases the risk of a CE; hence, non-anthracycline chemotherapy may be considered, particularly in patients with cardiovascular risk factors.
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Affiliation(s)
- E de Azambuja
- Institut Jules Bordet and L'Université Libre de Bruxelles (U.L.B), Brussels, Belgium.
| | - E Agostinetto
- Institut Jules Bordet and L'Université Libre de Bruxelles (U.L.B), Brussels, Belgium
| | - M Procter
- Frontier Science, Kincraig, Kingussie, UK
| | - D Eiger
- F.Hoffmann-La Roche Ltd, Basel, Switzerland
| | - N Pondé
- Clinical Oncology Department, AC Camargo Cancer Center, São Paulo, Brazil
| | - S Guillaume
- Institut Jules Bordet and L'Université Libre de Bruxelles (U.L.B), Brussels, Belgium
| | - D Parlier
- Institut Jules Bordet and L'Université Libre de Bruxelles (U.L.B), Brussels, Belgium
| | - M Lambertini
- Department of Medical Oncology, U.O. Clinica di Oncologia Medica, IRCCS Ospedale Policlinico San Martino, Genova, Italy; Department of Internal Medicine and Medical Sciences (DiMI), School of Medicine, University of Genova, Genova, Italy
| | - A Desmet
- Institut Jules Bordet and L'Université Libre de Bruxelles (U.L.B), Brussels, Belgium
| | - C Caballero
- Breast International Group, Brussels, Belgium
| | - C Aguila
- F.Hoffmann-La Roche Ltd, Basel, Switzerland
| | - G Jerusalem
- CHU Liege and Liege University, Liege, Belgium
| | - J M Walshe
- Cancer Trials Ireland, St Vincent's University Hospital, Dublin, Ireland
| | - E Frank
- Dana-Farber Cancer Institute, Boston, USA
| | - J Bines
- Instituto Nacional de Cancer, INCA, Rio de Janeiro, Brazil
| | - S Loibl
- German Breast Group, Neu-Isenburg, Germany
| | - M Piccart-Gebhart
- Institut Jules Bordet and L'Université Libre de Bruxelles (U.L.B), Brussels, Belgium
| | - M S Ewer
- University of Texas, MD Anderson Cancer Center, Houston
| | - S Dent
- Duke Cancer Institute, Duke University, Durham, USA
| | - C Plummer
- Department of Cardiology, Freeman Hospital, Newcastle upon Tyne, UK
| | - T Suter
- Department of Cardiology, Cardio-Oncology, Bern University Hospital, Bern, Switzerland
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Franzoi MA, Procter M, Twelves C, Ponde N, Eiger D, Emond O, Clark E, Parlier D, Guillaume S, Reaby L, de Azambuja E, Bines J. Timelines to initiate a phase III trial across the globe: a sub-analysis of the APHINITY trial. Ecancermedicalscience 2022; 16:1379. [PMID: 35702414 PMCID: PMC9116999 DOI: 10.3332/ecancer.2022.1379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Indexed: 11/10/2022] Open
Abstract
Background Geographic location and national income may influence access to innovation in healthcare. We aimed to study if geographical location and national income influenced the timelines to activate the global phase III APHINITY trial, evaluating adjuvant pertuzumab in patients with HER2-positive early breast cancer. Methods Time from regulatory authority (RA) submission to approval (RAA), time to Ethics Committee/Institutional Review Board (EC/IRB) approval, time from study approval by EC/IRB to first randomised patient and from first to last randomised patient were collected. Analyses were conducted grouping countries by geographical region or economic income classification. Results Forty-one countries (of 42) had data available regarding all relevant timelines. No statistical difference was observed between the time to RAA and geographical region (p = 0.47), although there was a trend to longer time to RAA in upper middle-income economies (p = 0.07). Except for time from first to last patient randomised, there was wide variation in timelines overall and within geographical regions and economic income groups. Conclusions Geographical location and income classification did not appear to be the major drivers influencing time for clinical trial activation. Wide variability in activation timelines within geographical regions and income groups exists and is worthy of further investigation.
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Affiliation(s)
- Maria Alice Franzoi
- Clinical Trials Support Unit, Jules Bordet Institute, Brussels, Belgium
- https://orcid.org/0000-0002-2470-6054
| | | | - Chris Twelves
- University of Leeds and Leeds Teaching Hospitals Trust, Leeds, UK
| | - Noam Ponde
- AC Camargo Cancer Center, São Paulo, Brazil
| | | | | | - Emma Clark
- Roche Products Ltd, Welwyn Garden City, UK
| | - Damien Parlier
- Clinical Trials Support Unit, Jules Bordet Institute, Brussels, Belgium
| | | | - Linda Reaby
- Patient Representative, Newcastle, Australia
| | | | - Jose Bines
- Instituto Nacional de Câncer, INCA, Rio de Janeiro, Brazil
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de Azambuja E, Eiger D, Procter MJ, Ponde NF, Guillaume S, Parlier D, Lambertini M, Desmet A, Caballero CA, Aguila C, Jerusalem GHM, Walshe JM, Frank ES, Bines J, Loibl S, Piccart-Gebhart MJ, Ewer MS, Dent SF, Plummer C, Suter TM. Cardiac safety of dual anti-HER2 blockade with pertuzumab plus trastuzumab (P+T) in the APHINITY trial. J Clin Oncol 2021. [DOI: 10.1200/jco.2021.39.15_suppl.510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
510 Background: Trastuzumab (T) increases the incidence of cardiac events (CEs) in patients (pts) with early breast cancer (BC). Dual blockade with P+T improves BC outcomes and is the standard of care for high-risk HER2-positive BC pts following the phase 3 APHINITY trial that evaluated the addition of P or placebo (Pla) to T and chemotherapy (CT). We analyzed the cardiac safety of P+T in APHINITY. Methods: APHINITY eligibility required a left ventricular ejection fraction (LVEF) ≥55% at study entry. LVEF assessment was performed every 3 months (mos) during treatment, every 6 mos up to month 36, and yearly thereafter. Primary CE was defined as heart failure (HF) class III/IV and a significant decrease in LVEF of at least 10 percentage points from baseline and to <50%, or cardiac death. Secondary CE was defined as a confirmed significant decrease in LVEF or CEs confirmed by the cardiac advisory board. Results: The safety analysis population consists of 4,769 pts. With 74 mos median follow-up (FU), CEs were observed in 159 pts (3.3%): 83 (3.5%) in the P+T and 76 (3.2%) in Pla+T arms, respectively. Most CEs occurred during anti-HER2 therapy: 123/159 (77.4%) and were asymptomatic or mildly symptomatic LVEF decrease (133/159; 83.6%) (Table 1). There were 2 cardiac deaths in each arm (0.1%). More CEs occurred in pts receiving an anthracycline-based CT compared to those receiving non-anthracycline CT (139 vs. 20 CEs, respectively). Acute recovery from a CE based on subsequent LVEF values was observed in 127/155 pts (81.9%). Conclusions: Dual blockade with P+T does not increase the risk of CE compared to Pla+T alone. The use of anthracycline-based CT increases the risk of a CE; hence non-anthracycline CT may be considered particularly in pts with other cardiovascular risk factors. Clinical trial information: NCT01358877. [Table: see text]
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Affiliation(s)
- Evandro de Azambuja
- Institut Jules Bordet and Université Libre de Bruxelles (U.L.B), Brussels, Belgium
| | - Daniel Eiger
- Hospital Israelita Albert Einstein, São Paulo, Brazil
| | | | | | | | - Damien Parlier
- Breast European Adjuvant Study Team (BrEAST) Data Center, Institut Jules Bordet, Brussels, Belgium
| | - Matteo Lambertini
- U.O. Clinica di Oncologia Medica, IRCCS Ospedale Policlinico San Martino, Department of Internal Medicine and Medical Specialties (DiMI), University of Genova, Genoa, Italy
| | | | | | | | | | - Janice Maria Walshe
- NSABP/NRG Oncology, and Cancer Trials Ireland, St Vincent's University Hospital, Dublin, Ireland
| | | | - Jose Bines
- Instituto Nacional de Câncer, Rio De Janeiro, Brazil
| | | | | | - Michael S. Ewer
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Chris Plummer
- Department of Cardiology, Freeman Hospital, Newcastle, United Kingdom
| | - Thomas M Suter
- Swiss Cardiovascular Center, Inselspital, Bern University Hospital, Bern, Switzerland
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Franzoi MA, Procter M, Emond O, Parlier D, Pondé N, Eiger D, Guillaume S, Reaby L, Twelves C, Clark E, de Azambuja E, Bines J. Abstract PS7-21: Timelines to initiate an adjuvant phase III trial across the globe: A sub-analysis of the APHINITY trial. Cancer Res 2021. [DOI: 10.1158/1538-7445.sabcs20-ps7-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background:Previous analysis of an adjuvant breast cancer trial (NCT00490139) suggested that geographical location and income affected the time required to set up a clinical trial, being significantly longer in South American and upper-middle income economies, potentially affecting access of innovative therapies in these locations. Understanding that this can be a dynamic process, we performed a similar analysis for the recent global phase III APHINITY trial (NCT01358877), which investigated the addition of pertuzumab to chemotherapy and trastuzumab as adjuvant therapy for patients with HER2-positive primary breast cancer.
Methods:Time to regulatory authority (RA) submission to approval, time to ethics committee/institutional review board (EC/IRB) approval, time from study approval by EC/IRB to first randomized patient, and time from first to last randomized patient were collected prospectively. Analyses were conducted by grouping countries either by geographical region or economic income classification as per 2019 World Bank criteria. Descriptive statistics of medians and ranges were calculated for the different timelines evaluated. Differences between geographical regions and economic income classification groups were calculated using one-way analysis of variance (ANOVA) following data normalization on square roots of the time to local RA. Geographical regions represented by only one participating country were not included in the ANOVA calculations.
Results:APHINITY randomized 4805 patients between November 2011 and August 2013. Of the 42 participating countries, 41 had data available regarding all relevant timelines. Of those, 21 (51.2%) were located in Europe, 9 (21.9%) in the East Asia-Pacific region, 8 (19.5%) in Latin America and Caribbean, 2 (4.8%) in North America, and 1 (2.4%) in Sub-Saharan Africa. Twenty-seven (65.8%) of the participating countries had high, 11 (26.8%) upper-middle, and 3 (7.3%) had lower-middle income economies.
Except for time from first patient to last patient randomized, there was wide variation in timelines within geographical region and across economic income classification. For example, the median time from EC/IRB approval to first recruited patient across all geographical regions was 118 days, but the range was wide (13– 463 days). There was, however, no statistical difference between the time to RA according to geographical region (p=0.47) although there was a trend to longer time to RA in upper-middle income economies compared to the others (p=0.07).
Conclusion
Our results did not demonstrate a significantly longer time for trial activation in Latin American & Caribbean countries and upper-middle income economies compared to other groups in the APHINITY trial. When compared to a previous report, this may reflect collective work from collaborative research groups, pharmaceutical industry sponsors and regulatory authorities across the globe and is to be welcomed. Variability in timelines within geographical regions and income classifications may exist and should be further investigated.
Table 1: Timelines in the activation process of APHINITY across geographical region and economic income classification.Time to RA (days)*Time to EC/IRB (days)Time from EC/IRB approval to first patient (days)Time from first patient to last patient randomized (months)Europe and Central Asia56 (4-135)67 (22-164)109 (13-257)17.6 (13.2-21.7)North America31 (30-32)73 (19-126)126 (86-165)17.6 (13.8-21.5)East Asia and Pacific53 (15-372)67 (31-421)108 (56-147)18 (8.7-19.9)Latin America and Caribbean51 (15-276)43 (19-273)232 (98-463)14.6 (6.5-17.5)Middle East and North Africa-141 (141-141)92 (92-92)13.9 (13.9-13.9)Sub-Saharan Africa103 (103-103)14 (14-14)185 (185-185)18.2 (18.2-18.2)Overall53 (4-372)56 (14-421)118 (13-463)17 (6.5-21.7)High income45 (4-276)60 (19-273)98 (13-257)18.2 (11.9-21.7)Upper middle income92 (15-372)54 (14-421)185 (73-463)14.2 (6.5-18.2)Lower middle income55 (32-111)33 (32-78)201 (147-209)15.1 (13.5-17.4)Overall53 (4-372)56 (14-421)118 (13-463)17 (6.5-21.7)Data are medians (range)*The protocol was not submitted to a country regulatory authority for Israel. The corresponding timelines for Israel cannot be calculated.EC/IRB = ethics committee/institutional review board; RA = regulatory approval
Citation Format: Maria Alice Franzoi, Marion Procter, Orianne Emond, Damien Parlier, Noam Pondé, Daniel Eiger, Sebastien Guillaume, Linda Reaby, Christopher Twelves, Emma Clark, Evandro de Azambuja, Jose Bines. Timelines to initiate an adjuvant phase III trial across the globe: A sub-analysis of the APHINITY trial [abstract]. In: Proceedings of the 2020 San Antonio Breast Cancer Virtual Symposium; 2020 Dec 8-11; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2021;81(4 Suppl):Abstract nr PS7-21.
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Affiliation(s)
| | | | | | | | - Noam Pondé
- 4AC Camargo Cancer Center, São Paulo, Brazil
| | | | | | - Linda Reaby
- 5Patient Representative, Newcastle, Australia
| | | | - Emma Clark
- 7F. Hoffmann-La Roche, Basel, Switzerland
| | | | - Jose Bines
- 8Instituto Nacional do Cancer - INCA, Rio de Janeiro, Brazil
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Barsamian C, Carette C, Sasso M, Poghosyan T, Bedossa P, Emile JF, Parlier D, Miette V, Bouillot JL, Czernichow S, Rives-Lange C. Diagnostic of hepatic fibrosis with the XL probe of the Fibroscan versus biopsies in patients candidates to bariatric surgery. Clin Nutr ESPEN 2020; 37:226-232. [PMID: 32359748 DOI: 10.1016/j.clnesp.2020.02.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 02/02/2020] [Accepted: 02/15/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND AIMS The risks of the histological evaluation for metabolic liver disease in severe obese subjects led to the development of the Fibroscan® device. The main objective of our study is to evaluate the diagnostic performance of XL probe for the measurement of hepatic fibrosis compared to histological examination, in obese subjects operated from bariatric surgery. METHODS We included patients free from chronic liver diseases. Liver measurement and controlled attenuation parameter (CAP) were carried out using the Fibroscan®. Liver biopsies were performed during bariatric surgery and evaluated by two pathologists. Correlation between vibration-controlled transient elastography (VCTE) and fibrosis stage was assessed using the Kendall correlation coefficient. Diagnosis performance was assessed using receiver-operating-characteristic curve analysis together with its 95% confidence interval. Cut-off value maximizing the Youden index was computed together with specificity, sensitivity, positive and negative predictive values. RESULTS The average age and body mass index were 41 years and 43 kg/m2, respectively (n = 108). Forty-one percent of patients presented fibrosis on the histological results. The Kendall correlation coefficient between fibrosis stage and liver stiffness measurement (LSM) was κ = 0.33, p<10-5. ROC analysis for the detection of fibrosis indicated the following values: 0.70 [0.60-0.79] for F≥1, 0.83 [0.72-0.92] for F≥2, 0.90 [0.83-0.97] for F≥3. Optimal cut-offs maximizing the Youden index were 7.0 kPa for F≥1, 8.1 kPa for F≥2 and 8.7 kPa for F≥3. CONCLUSION Fibroscan® appears to be reliable for detection of significant and severe fibrosis in severe obese patients such as candidates for bariatric surgery. CLINICAL TRIAL NUMBER NCT03548597.
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Affiliation(s)
- C Barsamian
- APHP. Centre-Université de Paris, Hôpital Européen Georges-Pompidou, Service de Nutrition Paris, France
| | - C Carette
- APHP. Centre-Université de Paris, Hôpital Européen Georges-Pompidou, Service de Nutrition Paris, France
| | | | - T Poghosyan
- Université de Paris, Paris, France; APHP. Centre-Université de Paris, Hôpital Européen Georges-Pompidou, Service de Chirurgie Digestive, Paris, France
| | - P Bedossa
- Département d'Anatomie Pathologie, APHP, Hôpital Bichat-Beaujon, Paris, France
| | - J F Emile
- Service d'anatomopathologie, Hôpital Ambroise Paré, Boulogne-Billancourt, France
| | - D Parlier
- Service d'hépato-gastroentérologie, Hôpital Ambroise Paré, Boulogne-Billancourt, France
| | | | - J L Bouillot
- Service de Chirurgie Digestive, Hôpital Saint Joseph, Paris, France
| | - S Czernichow
- APHP. Centre-Université de Paris, Hôpital Européen Georges-Pompidou, Service de Nutrition Paris, France; Université de Paris, Paris, France.
| | - C Rives-Lange
- APHP. Centre-Université de Paris, Hôpital Européen Georges-Pompidou, Service de Nutrition Paris, France; Université de Paris, Paris, France
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Marthey L, Cadiot G, Seksik P, Pouderoux P, Lacroute J, Skinazi F, Mesnard B, Chayvialle JA, Savoye G, Druez A, Parlier D, Abitbol V, Gompel M, Eoche M, Poncin E, Bobichon R, Colardelle P, Wils P, Salloum H, Peschard S, Zerbib F, Méresse B, Cerf-Bensussan N, Malamut G, Carbonnel F. Olmesartan-associated enteropathy: results of a national survey. Aliment Pharmacol Ther 2014; 40:1103-9. [PMID: 25199794 DOI: 10.1111/apt.12937] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Revised: 06/23/2014] [Accepted: 08/08/2014] [Indexed: 12/12/2022]
Abstract
BACKGROUND Recently, a new enteropathy has been described: olmesartan-associated enteropathy. However, the association has been questioned: a phase 3 trial and a cohort study found no association between gastrointestinal events and olmesartan. AIM To collect French cases of sartan-associated enteropathy to describe further this entity, confirm or refute causality, and determine if the association exists with other sartans. METHODS French gastroenterologists were invited to report cases of sartan-associated enteropathy and collect clinical, biological and histological data. Patients with diarrhoea and histological duodenal abnormalities were included. RESULTS Thirty-six patients with olmesartan-associated enteropathy were reported, including 32 with villous atrophy and four without. There was only one patient with irbesartan-associated enteropathy. None of the patients died. Patients with villous atrophy had diarrhoea, vomiting, renal failure, hypokalaemia, body weight loss and hypoalbuminaemia. Thirty-one patients were hospitalised; four required intensive care. Anti-transglutaminase and anti-enterocyte antibodies were negative; anti-nuclear antibodies were positive (9/11). Endoscopic duodenal biopsies showed villous atrophy (32/32) and polyclonal intra-epithelial CD3+CD8+ lymphocytosis (11/11). Exactly, 14/15 patients responded to steroids and/or immunosuppressants, prescribed because of suspected autoimmune enteropathy. Ten olmesartan interruptions were followed by reintroductions before steroids or immunosuppressants. Interruptions were followed by remissions (9/10), but reintroductions were followed by relapses (9/9). Twenty-nine patients were in remission since olmesartan interruption, including 26 without immunosuppressants. Patients with normal villi had similar clinical characteristics, but mild histological abnormalities (intra-epithelial lymphocytosis and lamina propria lymphocytic infiltration). CONCLUSIONS Olmesartan causes a severe and immune-mediated enteropathy, with or without villous atrophy. Enteropathy associated with other sartans seems to be very rare.
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Affiliation(s)
- L Marthey
- Kremlin Bicêtre University Hospital, Assistance Publique-Hopitaux de Paris (AP-HP), Paris-Sud University, Le Kremlin Bicêtre; Antoine Béclère University Hospital, AP-HP, Paris-Sud University, Clamart, France
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Parlier D, Moers V, Van Campenhout C, Preillon J, Leclère L, Saulnier A, Sirakov M, Busengdal H, Kricha S, Marine JC, Rentzsch F, Bellefroid EJ. The Xenopus doublesex-related gene Dmrt5 is required for olfactory placode neurogenesis. Dev Biol 2012; 373:39-52. [PMID: 23064029 DOI: 10.1016/j.ydbio.2012.10.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 09/16/2012] [Accepted: 10/03/2012] [Indexed: 11/17/2022]
Abstract
The Dmrt (doublesex and mab-3 related transcription factor) genes encode a large family of evolutionarily conserved transcription factors whose function in sex specific differentiation has been well studied in all animal lineages. In vertebrates, their function is not restricted to the developing gonads. For example, Xenopus Dmrt4 is essential for neurogenesis in the olfactory system. Here we have isolated and characterized Xenopus Dmrt5 and found that it is coexpressed with Dmrt4 in the developing olfactory placodes. As Dmrt4, Dmrt5 is positively regulated in the ectoderm by neural inducers and negatively by proneural factors. Both Dmrt5 and Dmrt4 genes are also activated by the combined action of the transcription factor Otx2, broadly transcribed in the head ectoderm and of Notch signaling, activated in the anterior neural ridge. As for Dmrt4, knockdown of Dmrt5 impairs neurogenesis in the embryonic olfactory system and in neuralized animal caps. Conversely, its overexpression promotes neuronal differentiation in animal caps, a property that requires the conserved C-terminal DMA and DMB domains. We also found that the sea anenome Dmrt4/5 related gene NvDmrtb also induces neurogenesis in Xenopus animal caps and that conversely, its knockdown in Nematostella reduces elav-1 positive neurons. Together, our data identify Dmrt5 as a novel important regulator of neurogenesis whose function overlaps with that of Dmrt4 during Xenopus olfactory system development. They also suggest that Dmrt may have had a role in neurogenesis in the last common ancestor of cnidarians and bilaterians.
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Affiliation(s)
- Damien Parlier
- Laboratoire de Génétique du Développement, Université Libre de Bruxelles, Institut de Biologie et de Médecine Moléculaires (IBMM), rue des Profs. Jeener et Brachet 12, B-6041 Gosselies, Belgium
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Saulnier A, Keruzore M, De Clercq S, Bar I, Moers V, Magnani D, Walcher T, Filippis C, Kricha S, Parlier D, Viviani L, Matson CK, Nakagawa Y, Theil T, Götz M, Mallamaci A, Marine JC, Zarkower D, Bellefroid EJ. The doublesex homolog Dmrt5 is required for the development of the caudomedial cerebral cortex in mammals. ACTA ACUST UNITED AC 2012; 23:2552-67. [PMID: 22923088 DOI: 10.1093/cercor/bhs234] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Regional patterning of the cerebral cortex is initiated by morphogens secreted by patterning centers that establish graded expression of transcription factors within cortical progenitors. Here, we show that Dmrt5 is expressed in cortical progenitors in a high-caudomedial to low-rostrolateral gradient. In its absence, the cortex is strongly reduced and exhibits severe abnormalities, including agenesis of the hippocampus and choroid plexus and defects in commissural and thalamocortical tracts. Loss of Dmrt5 results in decreased Wnt and Bmp in one of the major telencephalic patterning centers, the dorsomedial telencephalon, and in a reduction of Cajal-Retzius cells. Expression of the dorsal midline signaling center-dependent transcription factors is downregulated, including Emx2, which promotes caudomedial fates, while the rostral determinant Pax6, which is inhibited by midline signals, is upregulated. Consistently, Dmrt5(-/-) brains exhibit patterning defects with a dramatic reduction of the caudomedial cortex. Dmrt5 is increased upon the activation of Wnt signaling and downregulated in Gli3(xt/xt) mutants. We conclude that Dmrt5 is a novel Wnt-dependent transcription factor required for early cortical development and that it may regulate initial cortical patterning by promoting dorsal midline signaling center formation and thereby helping to establish the graded expression of the other transcription regulators of cortical identity.
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Affiliation(s)
- Amandine Saulnier
- Laboratoire de Génétique du Développement, Université Libre de Bruxelles, Institut de Biologie et de Médecine Moléculaires (IBMM), Gosselies, Belgium
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Parlier D, Ariza A, Christulia F, Genco F, Vanhomwegen J, Kricha S, Souopgui J, Bellefroid EJ. Xenopus zinc finger transcription factor IA1 (Insm1) expression marks anteroventral noradrenergic neuron progenitors in Xenopus embryos. Dev Dyn 2008; 237:2147-57. [PMID: 18627098 DOI: 10.1002/dvdy.21621] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The evolutionarily conserved IA1 (Insm1) gene is strongly expressed in the developing nervous system. Here, we show that IA1 is expressed during Xenopus laevis embryogenesis in neural plate primary neurons as well as in a population of uncharacterized anteroventral cells that form in front of the cement gland and that we identified as noradrenergic neurons. We also show that the formation of those anteroventral cells is dependent on BMPs and inhibited by Notch and that it is regulated by the transcription factors Xash1, Phox2, and Hand2. Finally, we provide functional evidence suggesting that IA1 may also play a role in their formation. Together, our results reveal that IA1 constitutes a novel player downstream of Xash1 in the formation of a previously unidentified population of Xenopus noradrenergic primary neurons.
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Affiliation(s)
- Damien Parlier
- Laboratoire d'Embryologie Moléculaire, Université Libre de Bruxelles, Institut de Biologie et de Médecine Moléculaires (IBMM), Gosselies, Belgium
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10
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Coriat R, Pommaret E, Chryssostalis A, Viennot S, Gaudric M, Brezault C, Lamarque D, Roche H, Verdier D, Parlier D, Prat F, Chaussade S. Quality control of colonoscopy procedures: a prospective validated method for the evaluation of professional practices applicable to all endoscopic units. ACTA ACUST UNITED AC 2008; 33:103-8. [PMID: 18783903 DOI: 10.1016/j.gcb.2008.04.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2008] [Revised: 04/28/2008] [Accepted: 04/29/2008] [Indexed: 01/12/2023]
Abstract
OBJECTIVES To produce valid information, an evaluation of professional practices has to assess the quality of all practices before, during and after the procedure under study. Several auditing techniques have been proposed for colonoscopy. The purpose of this work is to describe a straightforward original validated method for the prospective evaluation of professional practices in the field of colonoscopy applicable in all endoscopy units without increasing the staff work load. METHODS Pertinent quality-control criteria (14 items) were identified by the endoscopists at the Cochin Hospital and were compatible with: findings in the available literature; guidelines proposed by the Superior Health Authority; and application in any endoscopy unit. Prospective routine data were collected and the methodology validated by evaluating 50 colonoscopies every quarter for one year. RESULTS The relevance of the criteria was assessed using data collected during four separate periods. The standard checklist was complete for 57% of the colonoscopy procedures. The colonoscopy procedure was appropriate according to national guidelines in 94% of cases. These observations were particularly noteworthy: the quality of the colonic preparation was insufficient for 9% of the procedures; complete colonoscopy was achieved for 93% of patients; and 0.38 adenomas and 0.045 carcinomas were identified per colonoscopy. CONCLUSION This simple and reproducible method can be used for valid quality-control audits in all endoscopy units. In France, unit-wide application of this method enables endoscopists to validate 100 of the 250 points required for continuous medical training. This is a quality-control tool that can be applied annually, using a random month to evaluate any changes in routine practices.
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Affiliation(s)
- R Coriat
- Service de gastroentérologie, CHU Cochin, Faculté René-Descartes, Paris-V, 27, rue du faubourg Saint-Jacques, 75014 Paris, France.
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Cosconea S, Mitry E, Emile JF, Parlier D, Lacout A, Lepère C, Chagnon S, Rougier P. [Small hepatocellular carcinoma revealed by peritoneal carcinosis]. ACTA ACUST UNITED AC 2008; 32:499-501. [PMID: 18467056 DOI: 10.1016/j.gcb.2008.02.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2007] [Revised: 02/08/2008] [Accepted: 02/29/2008] [Indexed: 10/22/2022]
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Guidotti JE, Mallet VO, Mitchell C, Fabre M, Schoevaert D, Opolon P, Parlier D, Lambert M, Kahn A, Gilgenkrantz H. Selection of in vivo retrovirally transduced hepatocytes leads to efficient and predictable mouse liver repopulation. FASEB J 2001; 15:1849-51. [PMID: 11481251 DOI: 10.1096/fj.00-0892fje] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Guidotti JE, Mallet VO, Parlier D, Mitchell C, Fabre M, Jaffray P, Lambert M, Kahn A, Gilgenkrantz H. Fas/CD95 pathway induces mouse liver regeneration and allows for highly efficient retrovirus-mediated gene transfer. Hepatology 2001; 33:10-5. [PMID: 11124814 DOI: 10.1053/jhep.2001.20678] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [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: 12/07/2022]
Abstract
Stable gene transfer into hepatocytes has been proposed to compensate for genetic deficiencies that affect liver function, or to deliver diffusible factors into the circulation. This strategy can be achieved using retroviral vectors; however, cell division must occur. We describe a simple and reproductive method that enables the induction of hepatocyte replication in a controlled fashion, thus allowing an efficient in vivo retroviral liver transduction that is applicable to mouse models of human genetic disorders. The approach is based on liver susceptibility to apoptosis via the Fas/CD95 pathway. We show that, 4 days following a single Fas agonist antibody (JO2) injection, hepatocyte replication occurs, the intensity of which is correlated with the level of the induced hepatic cytolysis. This treatment enables in vivo liver transduction, and its efficiency also correlates with the level of hepatic cytolysis. When recombinant retroviral vectors were infused intravenously during the period of hepatocyte replication, 15.4% +/- 1.7% of the hepatocytes were transduced, reaching up to 32.5%.
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Mitchell C, Mignon A, Guidotti JE, Besnard S, Fabre M, Duverger N, Parlier D, Tedgui A, Kahn A, Gilgenkrantz H. Therapeutic liver repopulation in a mouse model of hypercholesterolemia. Hum Mol Genet 2000; 9:1597-602. [PMID: 10861286 DOI: 10.1093/hmg/9.11.1597] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Liver repopulation constitutes an attractive approach for the treatment of liver disorders or of diseases requiring abundant secretion of an active protein. We have described previously a model of selective repopulation of a normal liver by Fas/CD95-resistant hepatocytes, in which we achieved up to 16% hepatocyte repopulation. In the present study, we investigated the therapeutic efficacy of this strategy. With this aim, apolipoprotein E (ApoE) knockout mice were transplanted with Fas/CD95-resistant hepatocytes which constitutively express ApoE. Transplanted mice were submitted to weekly injections of non-lethal doses of the Fas agonist antibody Jo2. After 8 weeks of treatment, we obtained up to 30% of the normal level of plasma ApoE. ApoE secretion was accompanied by a drastic and significant decrease in total plasma cholesterol, which even fell to normal levels. Moreover, this secretion was sufficient to markedly reduce the progression of atherosclerosis. These results demonstrate the efficacy of this repopulation approach for correcting a deficiency in a protein secreted by the liver.
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Affiliation(s)
- C Mitchell
- INSERM U129 ICGM, Université Paris V René Descartes, Paris, France
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Valla DC, Chevallier M, Marcellin P, Payen JL, Trepo C, Fonck M, Bourliere M, Boucher E, Miguet JP, Parlier D, Lemonnier C, Opolon P. Treatment of hepatitis C virus-related cirrhosis: a randomized, controlled trial of interferon alfa-2b versus no treatment. Hepatology 1999; 29:1870-5. [PMID: 10347132 DOI: 10.1002/hep.510290616] [Citation(s) in RCA: 165] [Impact Index Per Article: 6.6] [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: 12/12/2022]
Abstract
To examine the effects of interferon (IFN) therapy on clinical, biochemical, and histological features in patients with compensated hepatitis C virus (HCV)-related cirrhosis, we have conducted a randomized, controlled trial of IFN therapy versus observation. Eight centers included a total of 99 patients with biopsy-proven cirrhosis. IFN-alpha2b, 3 million units three times per week, or no antiviral therapy was given for 48 weeks. Twenty-three patients dropped out. End-of-treatment biochemical response was not observed in any of the 39 controls but was observed in 6 of the 47 treated patients (P <.02); sustained biochemical response was obtained in only 2 treated patients. Controls and treated patients did not significantly differ with regard to the changes in serum level of albumin, bilirubin, alpha-fetoprotein, in plasma prothrombin, in histological activity, or liver collagen content. During trial or follow-up (160 +/- 57 weeks), hepatocellular carcinoma developed in 9 controls and 5 treated patients (NS); decompensation of cirrhosis occurred in 5 controls and 7 treated patients. Seven controls and 10 treated patients died. In conclusion, in patients with compensated HCV-related cirrhosis, a 48-week course of IFN therapy is safe and is able to induce end-of-treatment biochemical response in a significant proportion of patients. However, a 48-week course of IFN therapy usually fails to achieve sustained response and, within the limit of this study, did not significantly improve the 3-year outcome. Therefore, a longer course of IFN therapy or combination therapy with ribavirin should be evaluated in patients with HCV-related cirrhosis.
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Affiliation(s)
- D C Valla
- Services d'hépatogastroentérologie, Assistance publique-Hôpitaux de Parisù, Toulouse, France
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