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Polyzos NP, Neves AR, Drakopoulos P, Spits C, Alvaro Mercadal B, Garcia S, Ma PQM, Le LH, Ho MT, Mertens J, Stoop D, Tournaye H, Vuong NL. The effect of polymorphisms in FSHR and FSHB genes on ovarian response: a prospective multicenter multinational study in Europe and Asia. Hum Reprod 2021; 36:1711-1721. [PMID: 33889959 DOI: 10.1093/humrep/deab068] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [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: 12/20/2020] [Revised: 02/26/2021] [Indexed: 12/13/2022] Open
Abstract
STUDY QUESTION Does the presence of single nucleotide polymorphisms (SNPs) in the FSH receptor gene (FSHR) and/or FSH beta subunit-encoding gene (FSHB) influence ovarian response in predicted normal responders treated with rFSH? SUMMARY ANSWER The presence of FSHR SNPs (rs6165, rs6166, rs1394205) has a statistically significant impact in ovarian response, although this effect is of minimal clinical relevance in predicted normal responders treated with a fixed dose of 150 IU rFSH. WHAT IS KNOWN ALREADY Ovarian reserve markers have been a breakthrough in response prediction following ovarian stimulation. However, a significant percentage of patients show a disproportionate lower ovarian response, as compared with their actual ovarian reserve. Studies on pharmacogenetics have demonstrated a relationship between FSHR or FSHB genotyping and drug response, suggesting a potential effect of individual genetic variability on ovarian stimulation. However, evidence from these studies is inconsistent, due to the inclusion of patients with variable ovarian reserve, use of different starting gonadotropin doses, and allowance for dose adjustments during treatment. This highlights the necessity of a well-controlled prospective study in a homogenous population treated with the same fixed protocol. STUDY DESIGN, SIZE, DURATION We conducted a multicenter multinational prospective study, including 368 patients from Vietnam, Belgium, and Spain (168 from Europe and 200 from Asia), from November 2016 until June 2019. All patients underwent ovarian stimulation followed by oocyte retrieval in an antagonist protocol with a fixed daily dose of 150 IU rFSH until triggering. Blood sampling and DNA extraction was performed prior to oocyte retrieval, followed by genotyping of four SNPs from FSHR (rs6165, rs6166, rs1394205) and FSHB (rs10835638). PARTICIPANTS/MATERIALS, SETTING, METHODS Eligible were predicted normal responder women <38 years old undergoing their first or second ovarian stimulation cycle. Laboratory staff and clinicians were blinded to the clinical results and genotyping, respectively. The prevalence of hypo-responders, the number of oocytes retrieved, the follicular output rate (FORT), and the follicle to oocyte index (FOI) were compared between different FSHR and FSHB SNPs genotypes. MAIN RESULTS AND THE ROLE OF CHANCE The prevalence of derived allele homozygous SNPs in the FSHR was rs6166 (genotype G/G) 15.8%, rs6165 (genotype G/G) 34.8%, and rs1394205 (genotype A/A) 14.1%, with significant differences between Caucasian and Asian women (P < 0.001). FSHB variant rs10835638 (c.-211 G>T) was very rare (0.5%). Genetic model analysis revealed that the presence of the G allele in FSHR variant rs6166 resulted in less oocytes retrieved when compared to the AA genotype (13.54 ± 0.46 vs 14.81 ± 0.61, estimated mean difference (EMD) -1.47 (95% CI -2.82 to -0.11)). In FSHR variant rs1394205, a significantly lower number of oocytes was retrieved in patients with an A allele when compared to G/G (13.33 ± 0.41 vs 15.06 ± 0.68, EMD -1.69 (95% CI -3.06 to -0.31)). A significantly higher prevalence of hypo-responders was found in patients with the genotype A/G for FSHR variant rs6166 (55.9%, n = 57) when compared to A/A (28.4%, n = 29), ORadj 1.87 (95% CI 1.08-3.24). No significant differences were found regarding the FORT across the genotypes for FSHR variants rs6166, rs6165, or rs1394205. Regarding the FOI, the presence of the G allele for FSHR variant rs6166 resulted in a lower FOI when compared to the A/A genotype, EMD -13.47 (95% CI -22.69 to -4.24). Regarding FSHR variant rs6165, a lower FOI was reported for genotype A/G (79.75 ± 3.35) when compared to genotype A/A (92.08 ± 6.23), EMD -13.81 (95% CI -25.41 to -2.21). LIMITATIONS, REASONS FOR CAUTION The study was performed in relatively young women with normal ovarian reserve to eliminate biases related to age-related fertility decline; thus, caution is needed when extrapolating results to older populations. In addition, no analysis was performed for FSHB variant rs10835638 due to the very low prevalence of the genotype T/T (n = 2). WIDER IMPLICATIONS OF THE FINDINGS Based on our results, genotyping FSHR SNPs rs6165, rs6166, rs1394205, and FSHB SNP rs10835638 prior to initiating an ovarian stimulation with rFSH in predicted normal responders should not be recommended, taking into account the minimal clinical impact of such information in this population. Future research may focus on other populations and other genes related to folliculogenesis or steroidogenesis. STUDY FUNDING/COMPETING INTEREST(S) This study was supported by an unrestricted grant by Merck Sharp & Dohme (MSD). N.P.P. reports grants and/or personal fees from MSD, Merck Serono, Roche Diagnostics, Ferring International, Besins Healthcare, Gedeon Richter, Theramex, and Institut Biochimique SA (IBSA). N.L.V. and M.T.H. report consultancy and conference fees from Merck, Ferring, and MSD, outside the submitted work. P.D. has received honoraria for lecturing and/or research grants from MSD, Ferring International, and Merck. D.S. reports grants and/or personal fees from MSD, Ferring International, Merck Serono, Cook, and Gedeon Richter. A.R.N., B.A.M., C.S., J.M., L.H.L., P.Q.M.M., H.T., and S.G. report no conflict of interests. TRIAL REGISTRATION NUMBER NCT03007043.
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Affiliation(s)
- Nikolaos P Polyzos
- Department of Obstetrics, Gynecology and Reproductive Medicine, Dexeus University Hospital, Barcelona, Spain.,Faculty of Medicine and Health Sciences, Ghent University (UZ Gent), Gent, Belgium
| | - A R Neves
- Department of Obstetrics, Gynecology and Reproductive Medicine, Dexeus University Hospital, Barcelona, Spain.,Autonomous University of Barcelona, Cerdanyola del Vallès, Spain
| | - P Drakopoulos
- Centre for Reproductive Medicine, Universitair Ziekenhuis Brussel (UZ Brussel), Brussels, Belgium.,Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
| | - C Spits
- Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
| | - B Alvaro Mercadal
- Hospital de la Santa Creu i Sant Pau, Gynecology Department, Barcelona, Spain.,Fundació Puigvert, Reproductive Medicine Department, Barcelona, Spain
| | - S Garcia
- Department of Obstetrics, Gynecology and Reproductive Medicine, Dexeus University Hospital, Barcelona, Spain
| | - P Q M Ma
- IVFMD, My Duc Hospital, Ho Chi Minh City, Vietnam
| | - L H Le
- IVFMD, My Duc Hospital, Ho Chi Minh City, Vietnam
| | - M T Ho
- IVFMD, My Duc Hospital, Ho Chi Minh City, Vietnam
| | - J Mertens
- Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
| | - D Stoop
- Faculty of Medicine and Health Sciences, Ghent University (UZ Gent), Gent, Belgium
| | - H Tournaye
- Centre for Reproductive Medicine, Universitair Ziekenhuis Brussel (UZ Brussel), Brussels, Belgium.,Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Obstetrics, Gynecology, Perinatology and Reproduction, Institute of Professional Education, Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University), Moscow, Russia
| | - N L Vuong
- University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
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Vafaeian B, Le LH, Tran TNHT, El-Rich M, El-Bialy T, Adeeb S. Micro-scale finite element modeling of ultrasound propagation in aluminum trabecular bone-mimicking phantoms: A comparison between numerical simulation and experimental results. Ultrasonics 2016; 68:17-28. [PMID: 26894840 DOI: 10.1016/j.ultras.2016.01.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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: 07/20/2015] [Revised: 01/24/2016] [Accepted: 01/27/2016] [Indexed: 06/05/2023]
Abstract
The present study investigated the accuracy of micro-scale finite element modeling for simulating broadband ultrasound propagation in water-saturated trabecular bone-mimicking phantoms. To this end, five commercially manufactured aluminum foam samples as trabecular bone-mimicking phantoms were utilized for ultrasonic immersion through-transmission experiments. Based on micro-computed tomography images of the same physical samples, three-dimensional high-resolution computational samples were generated to be implemented in the micro-scale finite element models. The finite element models employed the standard Galerkin finite element method (FEM) in time domain to simulate the ultrasonic experiments. The numerical simulations did not include energy dissipative mechanisms of ultrasonic attenuation; however, they expectedly simulated reflection, refraction, scattering, and wave mode conversion. The accuracy of the finite element simulations were evaluated by comparing the simulated ultrasonic attenuation and velocity with the experimental data. The maximum and the average relative errors between the experimental and simulated attenuation coefficients in the frequency range of 0.6-1.4 MHz were 17% and 6% respectively. Moreover, the simulations closely predicted the time-of-flight based velocities and the phase velocities of ultrasound with maximum relative errors of 20 m/s and 11 m/s respectively. The results of this study strongly suggest that micro-scale finite element modeling can effectively simulate broadband ultrasound propagation in water-saturated trabecular bone-mimicking structures.
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Affiliation(s)
- B Vafaeian
- Department of Civil & Environmental Engineering, Faculty of Engineering, University of Alberta, Canada.
| | - L H Le
- Department of Radiology and Diagnostic Imaging, University of Alberta, Edmonton, Alberta, Canada.
| | - T N H T Tran
- Department of Radiology and Diagnostic Imaging, University of Alberta, Edmonton, Alberta, Canada.
| | - M El-Rich
- Department of Civil & Environmental Engineering, Faculty of Engineering, University of Alberta, Canada.
| | - T El-Bialy
- Orthodontics and Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Canada.
| | - S Adeeb
- Department of Civil & Environmental Engineering, Faculty of Engineering, University of Alberta, Canada.
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Huang K, Ta D, Wang W, Le LH. Simplified inverse filter tracking algorithm for estimating the mean trabecular bone spacing. IEEE Trans Ultrason Ferroelectr Freq Control 2008; 55:1453-1464. [PMID: 18986934 DOI: 10.1109/tuffc.2008.820] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Ultrasonic backscatter signals provide useful information relevant to bone tissue characterization. Trabecular bone microstructures have been considered as quasi-periodic tissues with a collection of regular and diffuse scatterers. This paper investigates the potential of a novel technique using a simplified inverse filter tracking (SIFT) algorithm to estimate mean trabecular bone spacing (MTBS) from ultrasonic backscatter signals. In contrast to other frequency-based methods, the SIFT algorithm is a time-based method and utilizes the amplitude and phase information of backscatter echoes, thus retaining the advantages of both the autocorrelation and the cepstral analysis techniques. The SIFT algorithm was applied to backscatter signals from simulations, phantoms, and bovine trabeculae in vitro. The estimated MTBS results were compared with those of the autoregressive (AR) cepstrum and quadratic transformation (QT) . The SIFT estimates are better than the AR cepstrum estimates and are comparable with the QT values. The study demonstrates that the SIFT algorithm has the potential to be a reliable and robust method for the estimation of MTBS in the presence of a small signal-to-noise ratio, a large spacing variation between regular scatterers, and a large scattering strength ratio of diffuse scatterers to regular ones.
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Affiliation(s)
- Kai Huang
- Dept. of Electron. Eng., Fudan Univ., Shanghai
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Zhang J, Lou E, Le LH, Hill D, Raso J, Wang Y. Computer-assisted Cobb angle measurement on posteroanterior radiographs. Stud Health Technol Inform 2008; 140:151-156. [PMID: 18810018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The Cobb angle method is the gold standard to assess severity of scoliosis. A computer-aided method was developed to provide a semi-automatic Cobb angle measurement during a scoliosis clinic. This study was to evaluate the reliability and accuracy of the developed method. Curve types were also tested. The computer method required enhancement of the contrast, normalization of the image size, and selection of the end-vertebrae on the radiographs before the automatic measurement started. The computer-aided process automatically identified the line segments that fitted to the endplates of the end-vertebrae. The Cobb angle was then calculated from the slopes of these lines. Seventy-six radiographs were randomly selected and categorized with Lenke's classification. Among them, 75 cases were used and categorized into 4 types: 1, 3, 5 and 6. One type 2 case was excluded. An orthopedic spine surgeon measured the radiographs manually, serving as the reference standard. Two observers used the developed method and measured twice. For each curve type, the inter-method, inter-observer, and intra-observer variability were analyzed by Intraclass correlation coefficients (ICC[2,1]). The ICC values were higher than 0.90 in all these types. The developed method was reliable to measure the Cobb angle and was not dependent on the curve type.
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Affiliation(s)
- J Zhang
- Department of Radiology and Diagnostic Imaging, University of Alberta, Edmonton, AB, Canada, T6G 2E1
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Hotte SJ, Hirte HW, Chen EX, Le LH, Corey A, Maclean M, Iacobucci A, Fox NL, Oza AM. HGS-ETR1, a fully human monoclonal antibody to the tumor necrosis factor-related apoptosis-inducing ligand death receptor 1 (TRAIL-R1) in patients with advanced solid cancer: Results of a phase 1 trial. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.3052] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- S. J. Hotte
- Juravinski Cancer Ctr, Hamilton, ON, Canada; Princess Margaret Hosp, Toronto, ON, Canada; Human Genome Sciences, Inc, Rockville, MD
| | - H. W. Hirte
- Juravinski Cancer Ctr, Hamilton, ON, Canada; Princess Margaret Hosp, Toronto, ON, Canada; Human Genome Sciences, Inc, Rockville, MD
| | - E. X. Chen
- Juravinski Cancer Ctr, Hamilton, ON, Canada; Princess Margaret Hosp, Toronto, ON, Canada; Human Genome Sciences, Inc, Rockville, MD
| | - L. H. Le
- Juravinski Cancer Ctr, Hamilton, ON, Canada; Princess Margaret Hosp, Toronto, ON, Canada; Human Genome Sciences, Inc, Rockville, MD
| | - A. Corey
- Juravinski Cancer Ctr, Hamilton, ON, Canada; Princess Margaret Hosp, Toronto, ON, Canada; Human Genome Sciences, Inc, Rockville, MD
| | - M. Maclean
- Juravinski Cancer Ctr, Hamilton, ON, Canada; Princess Margaret Hosp, Toronto, ON, Canada; Human Genome Sciences, Inc, Rockville, MD
| | - A. Iacobucci
- Juravinski Cancer Ctr, Hamilton, ON, Canada; Princess Margaret Hosp, Toronto, ON, Canada; Human Genome Sciences, Inc, Rockville, MD
| | - N. L. Fox
- Juravinski Cancer Ctr, Hamilton, ON, Canada; Princess Margaret Hosp, Toronto, ON, Canada; Human Genome Sciences, Inc, Rockville, MD
| | - A. M. Oza
- Juravinski Cancer Ctr, Hamilton, ON, Canada; Princess Margaret Hosp, Toronto, ON, Canada; Human Genome Sciences, Inc, Rockville, MD
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Le LH, Hirte HW, Hotte SJ, Maclean M, Iacobucci A, Corey A, Fox NL, Oza AM. Phase I study of a fully human monoclonal antibody to the tumor necrosis factor-related apoptosis-inducing ligand death receptor 4 (TRAIL-R1) in subjects with advanced solid malignancies or non-Hodgkin's lymphoma (NHL). J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.2533] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- L. H. Le
- Princess Margaret Hospital, Toronto, ON, Canada; Hamilton Regional Cancer Centre, Hamilton, ON, Canada; Human Genome Sciences, Inc., Rockville, MD
| | - H. W. Hirte
- Princess Margaret Hospital, Toronto, ON, Canada; Hamilton Regional Cancer Centre, Hamilton, ON, Canada; Human Genome Sciences, Inc., Rockville, MD
| | - S. J. Hotte
- Princess Margaret Hospital, Toronto, ON, Canada; Hamilton Regional Cancer Centre, Hamilton, ON, Canada; Human Genome Sciences, Inc., Rockville, MD
| | - M. Maclean
- Princess Margaret Hospital, Toronto, ON, Canada; Hamilton Regional Cancer Centre, Hamilton, ON, Canada; Human Genome Sciences, Inc., Rockville, MD
| | - A. Iacobucci
- Princess Margaret Hospital, Toronto, ON, Canada; Hamilton Regional Cancer Centre, Hamilton, ON, Canada; Human Genome Sciences, Inc., Rockville, MD
| | - A. Corey
- Princess Margaret Hospital, Toronto, ON, Canada; Hamilton Regional Cancer Centre, Hamilton, ON, Canada; Human Genome Sciences, Inc., Rockville, MD
| | - N. L. Fox
- Princess Margaret Hospital, Toronto, ON, Canada; Hamilton Regional Cancer Centre, Hamilton, ON, Canada; Human Genome Sciences, Inc., Rockville, MD
| | - A. M. Oza
- Princess Margaret Hospital, Toronto, ON, Canada; Hamilton Regional Cancer Centre, Hamilton, ON, Canada; Human Genome Sciences, Inc., Rockville, MD
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Chen YB, Nguyen KQ, Hoeffel CC, Le LH, Phan HT. [Endobronchial lipoma: apropos of a case with dual localization]. Rev Pneumol Clin 1998; 54:264-267. [PMID: 9894282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Endobronchial lipoma is an uncommon benign tumor. It is composed of fat tissue and is visible on CT scanner. We report an unusual case of a patient who developed two endobronchial lipomas. The first lipoma was removed 10 years earlier. We emphasize the contribution of computed tomography in the diagnosis of endobronchial lipoma. Cases of multiple lipomas are very scarce in the literature.
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Affiliation(s)
- Y B Chen
- Service de Radiologie, Hôpital Jeanne d'Arc, Toul
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Abstract
Berlage wavelets are used to simulate ultrasonic pulses in an unbounded, homogeneous, isotropic and absorptive medium. Intrinsic absorption of the medium is properly described by Kolsky's attenuation, which considers velocity dispersion to meet the causality condition. Several current time-domain velocity measurement techniques have been investigated using numerically simulated pulses for three normalized BUA values: 20, 40 and 60 dB MHz(-1) cm(-1), which mimic experimentally determined values for cancellous bone. The velocities, calculated using first motion transit times, are used as references supported by the Fermat principle of least time. The simulated results for fixed sample thickness indicate that pulse-broadening increases with the transit time of the reference point and the intrinsic absorption of the medium. Comparison shows that the first zero-crossing method yields 3-6% errors in velocity results, better than the cross-correlation method. However, the zero-crossing method gives inconsistent velocity measurement for a medium of 40 dB MHz(-1) cm(-1)1 absorption and three different thicknesses: 0.2, 0.4 and 0.6 cm. A novel technique for velocity measurement is presented using the peak of the envelope of a signal as a reference point to measure transit time difference. The envelope of a signal represents the instantaneous amplitude of the associated analytic signal. The velocities derived using this method differ from the true velocities by only 1.2-2.4%, more accurate than those obtained by the first zero-crossing method. The envelope peak has the additional merits of easy detection and robustness. Most importantly, the envelope technique may be used to yield accurate velocity measurement in cases where an accurate determination of the first motion transit time is sometimes prohibited due to the presence of noise.
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Affiliation(s)
- L H Le
- Department of Radiology and Diagnostic Imaging, Walter C Mackenzie Health Sciences Centre, The University of Alberta, Edmonton, Canada.
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Abstract
The amplitude acoustic reflection coefficient of an interface between two lossy biological tissues can be approximated as Rlossy approximately Rlossless + i delta/2 where Rlossless is the lossless acoustic reflection coefficient and delta is the change in alpha/kappa (absorption coefficient per wavenumber) across the tissue interface. This approximation is shown to be valid for both normal and oblique angles of incidence.
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Affiliation(s)
- L H Le
- Department of Radiology and Diagnostic Imaging, Walter C Mackenzic Health Sciences Centre, University of Alberta, Edmoñton, Canada.
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