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Langle YV, Morgado PDC, Belgorosky D, Marenco P, Menéndez P, Cáceres V, Aguilar A, Ostojich M, Lay L, Eiján AM, Sandes EO. Abstract 362: Patients with cervical cancer display an increase in leukocytes and myeloid cells that express S100A9. Cancer Res 2021. [DOI: 10.1158/1538-7445.am2021-362] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Cervical cancer is the second most common type of cancer affecting women worldwide. Leukocytosis have been related with treatment failure in this pathology, associated with the induction and accumulation of myeloid derived suppressor cells (MDSC) in peripheral blood. S100A9 proved to be a useful marker to identify MDSC in whole blood from patients with cancer. In this study, we analyzed the number of leukocytes that express S100A9, dividing them according to monocytic (CD14+) or granulocytic (CD15+) myeloid populations in patients with locally advanced cervical cancer (Ptes) and compared to healthy donors (Crls).
Methods: Peripheral blood samples collected from 11 Crls and 19 Ptes with cervical cancer (stage IB3-IVA) treated in our Institution between 2018 and 2020 with concurrent chemoradiotherapy (cisplatin) followed by brachytherapy. Blood samples (before treatment, before brachytherapy and post-treatment assessment) were obtained. Leukocytes from buffy coat fraction were isolated and stained for S100A9, CD14 and CD15 and then analyzed by flow cytometry. The predictive value of S100A9+ cells between Ptes and Crls was evaluated and associated with therapeutic response.
Results: An increase in leukocytes, granulocytes and monocytes positives for S100A9+ were observed in peripheral blood from Ptes with cervical cancer before treatment compared to Crls. Leukocytes: mean Ptes-Crls: 67.7-48.6; p=0.0017. Granulocytes: mean Ptes-Crls: 62.5-45.9; p=0.0073. Monocytes: median Ptes-Crls: 4.62-2.58; p=0.043. We did not find significant differences in S100A9+ cells over treatment between groups. Tumor response was dichotomized as complete and insufficient response (persistence + progression), relating it to S100A9+ cells. Using a logistic regression model, we observed that the percentage of leukocytes and granulocytes S100A9+ exhibited a trend close to significance of being associated with tumor response [Leukocytes odds ratio (OR): 0.908, 95% confidence interval (CI): 0.819-1.006, p=0.06; Granulocytes OR: 0.907, 95% CI: 0.821-1.002, p=0.057]. In this way, it represents that only a 1% increase in S100A9+ leukocytes or granulocytes are associated with a 9% reduction of having a complete response.
Conclusions: In our study, patients with locally advanced cervical cancer presented an increase in total leukocytes and myeloid cells that express S100A9. The relationship that seems to exist between S100A9+ leukocytes and granulocytes with tumor response may suggest that patients with high levels of these circulating cells could defined a higher risk population associated with therapeutic failure. Further analysis and a larger cohort of patients with cervical cancer will be necessary to assess the potential role of S100A9+ leukocytes and myeloid cells as predictive markers.
Citation Format: Yanina Veronica Langle, Pablo Damian Cresta Morgado, Denise Belgorosky, Pablo Marenco, Pablo Menéndez, Valeria Cáceres, Andrea Aguilar, Marcela Ostojich, Laura Lay, Ana María Eiján, Eduardo Omar Sandes. Patients with cervical cancer display an increase in leukocytes and myeloid cells that express S100A9 [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2021; 2021 Apr 10-15 and May 17-21. Philadelphia (PA): AACR; Cancer Res 2021;81(13_Suppl):Abstract nr 362.
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Affiliation(s)
| | | | | | - Pablo Marenco
- Instituto de Oncologia Angel H. Roffo, Buenos Aires, Argentina
| | - Pablo Menéndez
- Instituto de Oncologia Angel H. Roffo, Buenos Aires, Argentina
| | - Valeria Cáceres
- Instituto de Oncologia Angel H. Roffo, Buenos Aires, Argentina
| | - Andrea Aguilar
- Instituto de Oncologia Angel H. Roffo, Buenos Aires, Argentina
| | | | - Laura Lay
- Instituto de Oncologia Angel H. Roffo, Buenos Aires, Argentina
| | - Ana María Eiján
- Instituto de Oncologia Angel H. Roffo, Buenos Aires, Argentina
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Cibula D, Borčinová M, Marnitz S, Jarkovský J, Klát J, Pilka R, Torné A, Zapardiel I, Petiz A, Lay L, Sehnal B, Ponce J, Felsinger M, Arencibia-Sánchez O, Kaščák P, Zalewski K, Presl J, Palop-Moscardó A, Tingulstad S, Vergote I, Redecha M, Frühauf F, Köhler C, Kocián R. Lower-Limb Lymphedema after Sentinel Lymph Node Biopsy in Cervical Cancer Patients. Cancers (Basel) 2021; 13:cancers13102360. [PMID: 34068399 PMCID: PMC8153612 DOI: 10.3390/cancers13102360] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/07/2021] [Accepted: 05/11/2021] [Indexed: 11/24/2022] Open
Abstract
Simple Summary Lower-limb lymphedema (LLL) is a well-recognized adverse outcome of the surgical management of cervical cancer. Recently, sentinel lymph node (SLN) biopsy has emerged as an alternative procedure to systematic pelvic lymphadenectomy (PLND) aiming to decrease the risk of complications, especially LLL development. Our study represents the first prospective analysis of LLL incidence in cervical cancer patients after a uterine procedure with SLN biopsy, without systematic PLND. In an international multicenter trial SENTIX, the group of 150 patients was prospectively evaluated using both objective and subjective LLL assessments in 6 months intervals for 2 years. Contrary to the expectations, our results showed that SLN biopsy does not eliminate the risk of LLL development which occurred in a mild or moderate stage in about 26% of patients with a median interval to the onset of 9 months. Abstract Background: To prospectively assess LLL incidence among cervical cancer patients treated by uterine surgery complemented by SLN biopsy, without PLND. Methods: A prospective study in 150 patients with stage IA1–IB2 cervical cancer treated by uterine surgery with bilateral SLN biopsy. Objective LLL assessments, based on limb volume increase (LVI) between pre- and postoperative measurements, and subjective patient-perceived swelling were conducted in six-month periods over 24-months post-surgery. Results: The cumulative incidence of LLL at 24 months was 17.3% for mild LLL (LVI 10–19%), 9.2% for moderate LLL (LVI 20–39%), while only one patient (0.7%) developed severe LLL (LVI > 40%). The median interval to LLL onset was nine months. Transient edema resolving without intervention within six months was reported in an additional 22% of patients. Subjective LLL was reported by 10.7% of patients, though only a weak and partial correlation between subjective-report and objective-LVI was found. No risk factor directly related to LLL development was identified. Conclusions: The replacement of standard PLND by bilateral SLN biopsy in the surgical treatment of cervical cancer does not eliminate the risk of mild to moderate LLL, which develops irrespective of the number of SLN removed.
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Affiliation(s)
- David Cibula
- Gynecologic Oncology Center, Department of Obstetrics and Gynecology, First Faculty of Medicine, Charles University and General University Hospital, 12000 Prague, Czech Republic; (M.B.); (F.F.); (R.K.)
- Correspondence: ; Tel.: +420-224-967-451
| | - Martina Borčinová
- Gynecologic Oncology Center, Department of Obstetrics and Gynecology, First Faculty of Medicine, Charles University and General University Hospital, 12000 Prague, Czech Republic; (M.B.); (F.F.); (R.K.)
| | - Simone Marnitz
- Department of Special Operative and Oncologic Gynaecology, Asklepios-Clinic Hamburg, 22763 Hamburg, Germany; (S.M.); (C.K.)
| | - Jiří Jarkovský
- Data Analysis Department, Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, 62500 Brno, Czech Republic;
| | - Jaroslav Klát
- Department of Obstetrics and Gynecology, University Hospital Ostrava, 70800 Ostrava Poruba, Czech Republic;
| | - Radovan Pilka
- Department of Obstetrics and Gynecology, Faculty of Medicine and Dentistry, Palacky University, University Hospital Olomouc, 77900 Olomouc, Czech Republic;
| | - Aureli Torné
- Unit of Gynecological Oncology, Institute Clinic of Gynaecology, Obstetrics, and Neonatology, Hospital Clinic-Institut d’Investigacions Biomediques August Pi i Sunyer (IDIBAPS), University of Barcelona, 08036 Barcelona, Spain;
| | - Ignacio Zapardiel
- Gynecologic Oncology Unit, La Paz University Hospital, 28046 Madrid, Spain;
| | - Almerinda Petiz
- Serviço de Ginecologia, Instituto Portugues de Oncologia do Porto, 1099-023 Porto, Portugal;
| | - Laura Lay
- Department of Gynaecology, Institute of Oncology Angel H Roffo University of Bueno s Aires, Buenos Aires C1417 DTB, Argentina;
| | - Borek Sehnal
- Department of Obstetrics and Gynecology, First Faculty of Medicine, University Hospital Bulovka, Charles University, 18081 Prague, Czech Republic;
| | - Jordi Ponce
- Department of Gynecology, Biomedical Research Institute of Bellvitge (IDIBELL), University Hospital of Bellvitge, University of Barcelona, 08908 Barcelona, Spain;
| | - Michal Felsinger
- Department of Gynecology and Obstetrics, Faculty of Medicine, Masaryk University, 60177 Brno, Czech Republic;
| | - Octavio Arencibia-Sánchez
- Departments of Gynecologic Oncology, University Hospital of the Canary Islands, 35016 Las Palmas de Gran Canaria, Spain;
| | - Peter Kaščák
- Department of Obstetrics and Gynecology, Faculty Hospital Trencin, 911 71 Trencin, Slovakia;
| | - Kamil Zalewski
- Department of Gynecologic Oncology, Holycross Cancer Center, 25-734 Kielce, Poland;
| | - Jiri Presl
- Department of Obstetrics and Gynecology, Faculty of Medicine Pilsen, University Hospital in Pilsen and Charles University, 30460 Pilsen, Czech Republic;
| | - Alicia Palop-Moscardó
- Gynecology Department, Instituto Valenciano de Oncologia (IVO), 46009 Valencia, Spain;
| | - Solveig Tingulstad
- Department of Obstetrics and Gynecology, Trondheim University Hospital, 7030 Trondheim, Norway;
| | - Ignace Vergote
- Department of Gynecology and Obstetrics, Leuven Cancer Institute, University Hospital Leuven, 3000 Leuven, Belgium;
| | - Mikuláš Redecha
- Department of Gynaecology and Obstetrics, University Hospital, Comenius University, 814 99 Bratislava, Slovakia;
| | - Filip Frühauf
- Gynecologic Oncology Center, Department of Obstetrics and Gynecology, First Faculty of Medicine, Charles University and General University Hospital, 12000 Prague, Czech Republic; (M.B.); (F.F.); (R.K.)
| | - Christhardt Köhler
- Department of Special Operative and Oncologic Gynaecology, Asklepios-Clinic Hamburg, 22763 Hamburg, Germany; (S.M.); (C.K.)
| | - Roman Kocián
- Gynecologic Oncology Center, Department of Obstetrics and Gynecology, First Faculty of Medicine, Charles University and General University Hospital, 12000 Prague, Czech Republic; (M.B.); (F.F.); (R.K.)
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Zapardiel I, Kocian R, Köhler C, Klat J, Germanova A, Jacob A, Bajsova S, Böhmer G, Lay L, Gil-Ibañez B, Havelka P, Kipp B, Szewczyk G, Toth R, Staringer JC, De Santiago J, Coronado PJ, Poka R, Laky R, Luyckx M, Fastrez M, Dusek L, Hernandez A, Cibula D. Voiding recovery after radical parametrectomy in cervical cancer patients: An international prospective multicentre trial - SENTIX. Gynecol Oncol 2021; 160:729-734. [PMID: 33419610 DOI: 10.1016/j.ygyno.2020.12.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 10/24/2020] [Accepted: 12/15/2020] [Indexed: 10/22/2022]
Abstract
OBJECTIVE Voiding dysfunctions represent a leading morbidity after radical hysterectomy performed in patients with early-stage cervical cancer. The aim of this study was to perform ad hoc analysis of factors influencing voiding recovery in SENTIX (SENTinel lymph node biopsy in cervIX cancer) trial. METHODS The SENTIX trial (47 sites, 18 countries) is a prospective study on sentinel lymph node biopsy without pelvic lymphadenectomy in patients with early-stage cervical cancer. Overall, the data of 300 patients were analysed. Voiding recovery was defined as the number of days from surgery to bladder catheter/epicystostomy removal or to post-voiding urine residuum ≤50 mL. RESULTS The median voiding recovery time was three days (5th-95th percentile: 0-21): 235 (78.3%) patients recovered in <7 days and 293 (97.7%) in <30 days. Only seven (2.3%) patients recovered after >30 days. In the multivariate analysis, only previous pregnancy (p = 0.033) and type of parametrectomy (p < 0.001) significantly influenced voiding recovery >7 days post-surgery. Type-B parametrectomy was associated with a higher risk of delayed voiding recovery than type-C1 (OR = 4.69; p = 0.023 vs. OR = 3.62; p = 0.052, respectively), followed by type-C2 (OR = 5.84; p = 0.011). Both previous pregnancy and type C2 parametrectomy independently prolonged time to voiding recovery by two days. CONCLUSIONS Time to voiding recovery is significantly related to previous pregnancy and type of parametrectomy but it is not influenced by surgical approach (open vs minimally invasive), age, or BMI. Type B parametrectomy, without direct visualisation of nerves, was associated with longer recovery than nerve-sparing type C1. Importantly, voiding dysfunctions after radical surgery are temporary, and the majority of the patients recover in less than 30 days, including patients after C2 parametrectomy.
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Affiliation(s)
- Ignacio Zapardiel
- Gynaecologic Oncology Unit, La Paz University Hospital-IdiPAZ, Madrid, Spain.
| | - Roman Kocian
- Gynaecologic Oncology Centre, Department of Obstetrics and Gynaecology, First Faculty of Medicine, Charles University and General University Hospital, CEEGOG, Prague, Czech Republic
| | - Cristhardt Köhler
- Department of Special Operative and Oncologic Gynaecology, Asklepios-Clinic Hamburg, Hamburg, Germany
| | - Jaroslav Klat
- Department of Obstetrics and Gynaecology, University Hospital Ostrava, Ostrava, Poruba, Czech Republic
| | - Anna Germanova
- Gynaecologic Oncology Centre, Department of Obstetrics and Gynaecology, First Faculty of Medicine, Charles University and General University Hospital, CEEGOG, Prague, Czech Republic
| | - Anna Jacob
- Department of Special Operative and Oncologic Gynaecology, Asklepios-Clinic Hamburg, Hamburg, Germany
| | - Sylva Bajsova
- Department of Obstetrics and Gynaecology, University Hospital Ostrava, Ostrava, Poruba, Czech Republic
| | - Gerd Böhmer
- Department of Special Operative and Oncologic Gynaecology, Asklepios-Clinic Hamburg, Hamburg, Germany
| | - Laura Lay
- Department of Gynaecology, Institute of Oncology Angel H Roffo University of Bueno s Aires, Buenos Aires, Argentina
| | - Blanca Gil-Ibañez
- Unit of Gynaecological Oncology, Institute Clinic of Gynaecology, Obstetrics and Neonatology (ICGON), Hospital Clinic of Barcelona, Barcelona, Spain
| | - Pavel Havelka
- Department of Obstetrics and Gynaecology, Bata Hospital Zlin, Czech Republic, CEEGOG, Zlin, Czech Republic
| | - Barbara Kipp
- Department of Obstetrics and Gynaecology, Cantonal Hospital of Lucerne, Lucerne, Switzerland
| | - Grzegorz Szewczyk
- Department of Obstetrics and Gynaecology, Institute of Mother and Child, Warsaw, Poland
| | - Robert Toth
- Oncology Institute of East Slovakia, Košice, Slovakia
| | - Juan Carlos Staringer
- Department of Gynaecology and Obstetrics, Hospital Español de Buenos Aires, Buenos Aires, Argentina
| | | | - Pluvio J Coronado
- Departamento de Obstetricia y Ginecología, Hospital Clínico San Carlos, Madrid, Spain
| | - Robert Poka
- Institute of Obstetrics and Gynaecology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Rene Laky
- Gynaecology, Medical University of Graz, Graz, Austria
| | - Mathieu Luyckx
- Department of Gynaecology, Universite catholique de Louvain, Cliniques Universitaires St Luc, 1200, Brussels, Belgium
| | - Maxime Fastrez
- Department of Obstetrics and Gynaecology, St Pierre University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Ladislav Dusek
- Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Alicia Hernandez
- Gynaecologic Oncology Unit, La Paz University Hospital-IdiPAZ, Madrid, Spain
| | - David Cibula
- Gynaecologic Oncology Centre, Department of Obstetrics and Gynaecology, First Faculty of Medicine, Charles University and General University Hospital, CEEGOG, Prague, Czech Republic
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Kim G, Buckley E, Herndon J, Allen K, Dale T, Adamson J, Lay L, Giles W, Rodrigues A, Wang Z, Kelsey C, Floyd S, Torok J, Chino J, Fecci P, Sampson J, Anders C, Yin F, Kirkpatrick J. Outcomes In Patients With 4-10 Brain Metastases Treated With Dose-Adapted Single-Isocenter Multitarget Stereotactic Radiosurgery: A Prospective Study. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Perez O, Tilley B, Navarrete G, Lay L, Little L, Gada R, Chantilis S. Oocyte vitrification using a new vitrification medium and a new closed vitrification device. A sibling oocyte study. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.530] [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] [Indexed: 10/28/2022]
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Nowacki M, Alyami M, Villeneuve L, Mercier F, Hubner M, Willaert W, Ceelen W, Reymond M, Pezet D, Arvieux C, Khomyakov V, Lay L, Gianni S, Zegarski W, Bakrin N, Glehen O. Multicenter comprehensive methodological and technical analysis of 832 pressurized intraperitoneal aerosol chemotherapy (PIPAC) interventions performed in 349 patients for peritoneal carcinomatosis treatment: An international survey study. Eur J Surg Oncol 2018. [PMID: 29526367 DOI: 10.1016/j.ejso.2018.02.014] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [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: 12/25/2022] Open
Abstract
BACKGROUND Pressurized intraperitoneal aerosol chemotherapy (PIPAC) is a new drug delivery method offered in selected patients suffering from non-resectable peritoneal carcinomatosis (PC). As reported experience is still limited, we conducted a survey among active PIPAC centers aiming to report their technical approach and clinical findings. METHODS An online survey was sent to active PIPAC centers worldwide. The questionnaire consisted of 34 closed questions and was conducted over a period of 3 months beginning in March 2017. RESULTS Nine out of 15 contacted centers completed the questionnaire totaling 832 PIPAC procedures in 349 patients. Most common indications for PIPAC were PC from gastric, ovarian and colorectal origin. The mean time between each PIPAC procedure was 6-8 weeks. Seven of nine (77.8%) centers evaluate the PCI at every PIPAC procedure. At least four tissue samples for histopathology analysis were retrieved in 5 (55.6%). All centers (100%) use the same chemotherapy protocol: oxaliplatin at a dosage of 92mg/m2 for PC of colorectal origin and a combination of cisplatin and doxorubicin at a dosage of 7.5mg/m2 and 1.5mg/m2, respectively, for other types of PC. Eight centers (88.9%) perform routine radiological evaluation before first PIPAC and after third PIPAC. CONCLUSION These data confirm that PIPAC procedures are homogeneously performed in established centers. Standardization of the procedure will facilitate future international multicenter prospective clinical trials.
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Affiliation(s)
- Maciej Nowacki
- Chair and Department of Surgical Oncology, Ludwik Rydygier's Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Oncology Centre-Prof. Franciszek Łukaszczyk Memorial Hospital in Bydgoszcz, Bydgoszcz, Poland.
| | - Mohammad Alyami
- Department of Digestive Surgery, Centre Hospitalier Lyon Sud, Pierre-Bénite, France; EMR 3738, Lyon 1 University, Lyon, France; RENAPE, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, 165 Chemin du Grand Revoyet, 69495, Pierre-Bénite, France; King Salman Scholarship Program, Saudi Arabian Cultural Bureau, Paris, France
| | - Laurent Villeneuve
- Hospices Civils de Lyon, Pôle Information Médicale Evaluation Recherche, Unité de Recherche Clinique, Lyon, France; EMR 3738, Lyon 1 University, Lyon, France; RENAPE, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, 165 Chemin du Grand Revoyet, 69495, Pierre-Bénite, France
| | - Frederic Mercier
- Department of Digestive Surgery, Centre Hospitalier Lyon Sud, Pierre-Bénite, France; RENAPE, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, 165 Chemin du Grand Revoyet, 69495, Pierre-Bénite, France
| | - Martin Hubner
- Department of Visceral Surgery, University Hospital of Lausanne (CHUV), Lausanne, Switzerland
| | - Wouter Willaert
- Department of Gastrointestinal Surgery, Ghent University Hospital, Ghent, Belgium
| | - Wim Ceelen
- Department of Gastrointestinal Surgery, Ghent University Hospital, Ghent, Belgium
| | - Marc Reymond
- Department of Surgery, University of Tübingen, Tübingen, Germany
| | - Denis Pezet
- Chirurgie et Oncologie Digestive, Université Clermont Auvergne Clermont-Ferrand, France
| | - Catherine Arvieux
- Digestive and Emergency Surgery, UGA-Université Grenoble Alpes, Grenoble, France
| | - Vladimir Khomyakov
- Moscow Research Oncological Institute n.a. P.A. Herzen, Thoracoabdominal, Moscow, Russian Federation
| | - Laura Lay
- Department of Gynecology Surgical Area at the Institute of Oncology A. H. Roffo, University of Buenos Aires, Buenos Aires, Argentina
| | - Sergio Gianni
- Instituto de Oncología Ángel Roffo, Buenos Aires, Argentina
| | - Wojciech Zegarski
- Chair and Department of Surgical Oncology, Ludwik Rydygier's Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Oncology Centre-Prof. Franciszek Łukaszczyk Memorial Hospital in Bydgoszcz, Bydgoszcz, Poland
| | - Naoual Bakrin
- Department of Digestive Surgery, Centre Hospitalier Lyon Sud, Pierre-Bénite, France; EMR 3738, Lyon 1 University, Lyon, France; RENAPE, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, 165 Chemin du Grand Revoyet, 69495, Pierre-Bénite, France
| | - Olivier Glehen
- Department of Digestive Surgery, Centre Hospitalier Lyon Sud, Pierre-Bénite, France; EMR 3738, Lyon 1 University, Lyon, France; RENAPE, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, 165 Chemin du Grand Revoyet, 69495, Pierre-Bénite, France
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Silvestri A, Di Silvio D, Llarena I, Murray RA, Marelli M, Lay L, Polito L, Moya SE. Influence of surface coating on the intracellular behaviour of gold nanoparticles: a fluorescence correlation spectroscopy study. Nanoscale 2017; 9:14730-14739. [PMID: 28948261 DOI: 10.1039/c7nr04640e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
In the biomedical applications of nanoparticles (NPs), the proper choice of surface chemistry is a crucial aspect in their design. The nature of the coating can heavily impact the interaction of NPs with biomolecules, affect the state of aggregation, and ultimately determine their biological fate. As such, protein corona formation and the aggregation behaviour of gold NPs (Au NPs) are studied here. Au NPs are prepared with four distinct surface functionalisations, namely mercaptosuccinic acid (MSA), N-4-thiobutyroil glucosamine, HS-PEG5000 and HS-alkyl-PEG600. Corona formation, aggregation, and the intracellular behaviour of the Au NPs are then investigated by means of Fluorescence Correlation Spectroscopy (FCS) in cell culture media and in live cells. To evaluate the state of aggregation and the formation of a protein corona, the Au NPs are incubated in cell media and the diffusion coefficient is determined via FCS. The in vitro behaviour is compared with the level of aggregation of the NPs in cells. Diffusion times of the NPs are estimated at different positions in the cell after a one hour incubation period. It is found that the majority of MSA and glucose-Au NPs are present inside the cell as slowly diffusing species with diffusion times (τD) greater than 6000 μs (hydrodynamic diameter >250 nm). PEGylated Au NPs adsorb a small amount of protein and manifest low agglomeration both in media and in living cells. In particular, the HS-alkyl-PEG600 coating shows an excellent correlation between lower protein adsorption, 4-fold lower compared to the MSA coated NPs, and limited intracellular aggregation. In the case of single HS-alkyl-PEG600 coated NPs, it is found that typical intracellular τD values range from 500 to 1500 μs, indicating that these particles display reduced aggregation in the intracellular environment.
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Affiliation(s)
- A Silvestri
- CNR - ISTM, Nanotechnology Lab., Via G. Fantoli 16/15, 20138, Milan, Italy.
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Ostojich MA, Gianni S, Marino L, Lupo E, De Dios D, Zeff N, Lay L, Damiani F, Sanchez A, Gimenez L, Jasnis MA. HYPOXIA AND BIOMARKERS EXPRESSION IN CERVICAL CANCER (CC) AND HIGH GRADE SQUAMOUS INTRAEPITHELIAL LESIONS (HSIL): IGCS-0037 Cervical Cancer. Int J Gynecol Cancer 2015. [DOI: 10.1136/00009577-201505001-00011] [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] [Indexed: 11/04/2022] Open
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Williams DL, Fitzmaurice T, Lay L, Forster K, Hefford J, Budge C, Blackmore K, Robinson JC, Field HF. Efficacy of antiviral agents in feline herpetic keratitis: Results of anin vitrostudy. Curr Eye Res 2009; 29:215-8. [PMID: 15512970 DOI: 10.1080/02713680490504849] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [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: 10/26/2022]
Abstract
PURPOSE To determine, by a plaque reduction assay, the in vitro efficacy of novel antiviral agents in the treatment of feline herpes virus 1 (FHV-1) keratitis in the domestic cat (Felis felis). MATERIALS AND METHODS A standard plaque reduction assay was performed using a laboratory strain of FHV-1 and embryo-derived feline kidney cells to determine the in vitro efficacy of the antiviral drugs penciclovir (PCV), bromovinyldeoxyuridine (BVdU), and (S)-9-(3-hydroxy-2-phosphonylmethoxypropyl) adenine (HPMPA) and to compare these with the drugs acyclovir (ACV) and trifluorothymidine (TFT). Efficacy was assessed by determining the dose of drug at which 50% plaque reduction was noted (ED(50)). RESULTS HPMPA was found to have greatest antiviral activity (ED(50) 0.07 microg/ml). ACV was least active (ED(50) 24 microg/ml), while TFT was active with an ED(50) of 5.7 microg/ml. PCV and BVdU had intermediate activity (ED(50) 1.6 and 1.7 microg/ml, respectively). CONCLUSIONS This study suggests that the efficacy of HPMPA, BVdU, and penciclovir in cats with herpesviral keratitis should be determined in vivo as their efficacy in vitro was substantially greater than that of acyclovir, already shown to have demonstrable but limited clinical antiviral activity.
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Affiliation(s)
- D L Williams
- Department of Clinical Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge, United Kingdom.
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Audet R, Shen C, Edgerton S, Lay L, Vang Nielsen K, Thor AD, Chang JC, Miller KD, Sledge GW, Leyland-Jones B. Thymidilate synthase (TS), thymidine phosphorylase (TP), dihydropyrimidine dehydrogenase (DPD), and dihydrofolate reductase (DHFR) as predictive markers of capecitabine efficacy in breast cancer patients. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.11033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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
11033 Background: The efficacy of 5-FU and the pro-drug capecitabine (C) is mediated through the thymidylate synthase pathway and may be affected by expression of key enzymes in this pathway. The expression and/or gene copy number of TS, TP, DPD and DHFR was assessed and correlated with time-to progression (TTP) and progression-free survival (PFS). Methods: Adult female patients with pathologically confirmed breast cancer and locally advanced or metastatic disease were treated with C 1000 mg/m2 BID days 1–14 of a 21-day cycle. Formalin-fixed, paraffin-embedded (FFPE) specimens from C-treated patients were processed for RNA extraction. Total RNA was isolated from 32 FFPE tissue samples containing at least 70% tumor cells and RNA levels for TS, TP, DPD and DHFR were quantified using real time RT-PCR and Affymetrix GeneChip microarrays. Custom made TS and TP FISH probes (Dako, Glostrup, Denmark) were used to evaluate gene copy number and gene to reference ratios in at least 60 morphologically intact non-overlapping nuclei. Markers were correlated with TTP and PFS using Cox proportional hazard models in 24 patients. Results: Higher TS gene copy number was significantly associated with a decrease in PFS (HR 1.46, 95% CI 1.08 to 1.96, p=0.014) and TTP (HR 1.49, 95% CI 1.05 to 2.13, p=0.028). However, the association between TS RNA levels (expressed as Ct values) and PFS (HR 0.82, 95% CI 0.61 to 1.11, p=0.198) or TTP (HR 0.74, 95% CI 0.49 to 1.14, p=0.172) failed to reach statistical significance. RNA levels, determined by Affymetrix, were significantly correlated with RT-PCR for TS (r= -0.5073, p=0.0004) and DHFR (r=-0.50994, p=0.003). Neither TP gene copy number nor RNA levels were significantly associated with PFS (HR 099, and HR 0.93) or TTP (HR 1.07 and HR 1.029), respectively. The association between RNA levels and PFS or TTP did not reach statistical significance for both DPD (HR 1.17 and HR 1.13) and DHFR (HR 0.68 and HR 0.63), respectively. Conclusions: These data indicate that TS gene copy number, assessed by FISH with proper standardization, might be a useful and easily accessible marker for C sensitivity in human breast cancer and warrants further investigation. [Table: see text]
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Affiliation(s)
- R. Audet
- V M Institute of Research, Montreal, QC, Canada; Indiana University, Indianapolis, IN; University of Colorado, Denver, CO; Hoosier Oncology Group, Indianapolis, IN; Dako, Glostrup, Denmark; Baylor College of Medicine, Houston, TX; Emory University, Atlanta, GA
| | - C. Shen
- V M Institute of Research, Montreal, QC, Canada; Indiana University, Indianapolis, IN; University of Colorado, Denver, CO; Hoosier Oncology Group, Indianapolis, IN; Dako, Glostrup, Denmark; Baylor College of Medicine, Houston, TX; Emory University, Atlanta, GA
| | - S. Edgerton
- V M Institute of Research, Montreal, QC, Canada; Indiana University, Indianapolis, IN; University of Colorado, Denver, CO; Hoosier Oncology Group, Indianapolis, IN; Dako, Glostrup, Denmark; Baylor College of Medicine, Houston, TX; Emory University, Atlanta, GA
| | - L. Lay
- V M Institute of Research, Montreal, QC, Canada; Indiana University, Indianapolis, IN; University of Colorado, Denver, CO; Hoosier Oncology Group, Indianapolis, IN; Dako, Glostrup, Denmark; Baylor College of Medicine, Houston, TX; Emory University, Atlanta, GA
| | - K. Vang Nielsen
- V M Institute of Research, Montreal, QC, Canada; Indiana University, Indianapolis, IN; University of Colorado, Denver, CO; Hoosier Oncology Group, Indianapolis, IN; Dako, Glostrup, Denmark; Baylor College of Medicine, Houston, TX; Emory University, Atlanta, GA
| | - A. D. Thor
- V M Institute of Research, Montreal, QC, Canada; Indiana University, Indianapolis, IN; University of Colorado, Denver, CO; Hoosier Oncology Group, Indianapolis, IN; Dako, Glostrup, Denmark; Baylor College of Medicine, Houston, TX; Emory University, Atlanta, GA
| | - J. C. Chang
- V M Institute of Research, Montreal, QC, Canada; Indiana University, Indianapolis, IN; University of Colorado, Denver, CO; Hoosier Oncology Group, Indianapolis, IN; Dako, Glostrup, Denmark; Baylor College of Medicine, Houston, TX; Emory University, Atlanta, GA
| | - K. D. Miller
- V M Institute of Research, Montreal, QC, Canada; Indiana University, Indianapolis, IN; University of Colorado, Denver, CO; Hoosier Oncology Group, Indianapolis, IN; Dako, Glostrup, Denmark; Baylor College of Medicine, Houston, TX; Emory University, Atlanta, GA
| | - G. W. Sledge
- V M Institute of Research, Montreal, QC, Canada; Indiana University, Indianapolis, IN; University of Colorado, Denver, CO; Hoosier Oncology Group, Indianapolis, IN; Dako, Glostrup, Denmark; Baylor College of Medicine, Houston, TX; Emory University, Atlanta, GA
| | - B. Leyland-Jones
- V M Institute of Research, Montreal, QC, Canada; Indiana University, Indianapolis, IN; University of Colorado, Denver, CO; Hoosier Oncology Group, Indianapolis, IN; Dako, Glostrup, Denmark; Baylor College of Medicine, Houston, TX; Emory University, Atlanta, GA
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11
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Abstract
1. The interaction between the cannabinoid agonists, WIN 55,212-2 or CP 55,940 with the CB(1) receptor-selective antagonists, SR141716A or LY320135 was investigated using the rat electrically-stimulated vas deferens bioassay. 2. Tissues were stimulated by single-field pulses (150 V, 0.5 ms) delivered every 30 mins. In the presence of nifedipine (3 microM), agonists elicited a concentration-dependent inhibition of the contractile response, with pEC(50) values of 7.93 and 6.84 for WIN 55,212-2 and CP 55,940, respectively. 3. SR141716A and LY320135 caused parallel dextral displacements of the agonist concentration-response curves. However, the shift of the agonist curves by either antagonist was accompanied by a concentration-dependent enhancement of basal (agonist-independent) tissue contraction. 4. Addition of the amidase inhibitor, phenylmethylsulphonylfluoride (200 microM), resulted in a significant reduction of the basal twitch response, an effect consistent with the presence of tonic receptor activation mediated by the endogenous cannabinoid, anandamide. 5. In light of these findings, we propose a theoretical model of competitive agonist-antagonist interaction in the presence of endogenous agonist tone that was used to derive an optimized analytical approach for the determination of antagonist potency estimates under conditions of tonic receptor activation. 6. This approach yielded pK(B) estimates for SR141716A and LY320135 that were in good agreement with their activity at cannabinoid CB(1) receptors. 7. It is concluded that the rat vas deferens contains prejunctional cannabinoid CB(1) receptors that are under tonic activation from endogenous substances; under these conditions our analytical approach is preferable to the standard methods for the determination of antagonist potency.
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Affiliation(s)
- A Christopoulos
- Department of Pharmacology, University of Melbourne, Grattan St., Parkville, Victoria, 3010, Australia.
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12
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Lay L, Bjorksten AR, Stainsby GV, Blake DW. Effect of amlodipine on cardiopulmonary performance in volunteers. Clin Exp Pharmacol Physiol 2001; 28:25-7. [PMID: 11153533 DOI: 10.1046/j.1440-1681.2001.03390.x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
1. In order to exclude a significant effect of the calcium channel antagonist amlodipine on cardiopulmonary performance in normal subjects, we performed a double-blind cross-over study of amlodipine (10 mg daily for 2 weeks) on oxygen uptake and catecholamine responses during exercise in eight volunteers. 2. Despite a therapeutic plasma concentration of amlodipine (22.8+/-9 ng/mL), there was no change in resting heart rate or blood pressure. Amlodipine did not cause significant change in oxygen uptake at the anaerobic threshold or at maximum exercise and there was also no change in heart rate or catecholamine responses. 3. Although there was an awareness of peripheral vasodilation and reports of lethargy during the active treatment period, the volunteers had no objective evidence of a decrease in cardiopulmonary performance. We suggest that use of amlodipine as a vasodilator in the perioperative period would not add to the myocardial depressant effects of general anaesthesia in patients with normal cardiac function.
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Affiliation(s)
- L Lay
- Department of Pharmacology, University of Melbourne, Parkville, Victoria, Australia
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13
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Abstract
The role of cannabinoid CB(1) receptors in sympathetic neurotransmission was characterised in nerve-mediated responses of isolated right atria, vasa deferentia and small mesenteric resistance arteries using the cannabinoid CB(1) receptor agonists Delta(9)-tetrahydrocannabinol, CP 55,940 and anandamide and the cannabinoid CB(1)-selective antagonist SR 141716A. In the mouse vas deferens, the twitch response was completely inhibited by each of the putative cannabinoid receptor agonists with pIC(50) values of CP 55,940, 9.2+/-0.1; Delta(9)-tetrahydrocannabinol, 8.4+/-0.1; anandamide, 7.1+/-0.1. SR 141716A 10-100 nM was a competitive antagonist of all three agonists with a pK(B) value of 8.4-8.6, consistent with an interaction at the cannabinoid CB(1) receptor. In the rat vas deferens CP 55,940 (0.01-10 microM) inhibited the contractions to a significant extent (88.5+/-0.5% at 10 microM; pIC(50) of 7.1+/-0.1) while Delta(9)-tetrahydrocannabinol and anandamide (both up to 10 microM) were inactive. CP 55,940 exhibited low potency in rat compared with mouse vas deferens and the rat concentration-response curve was not competitively antagonised by SR 141716A (100 nM) or SR 144528 (10 nM-10 microM), suggesting an interaction at a receptor(s) distinct from cannabinoid CB(1) or CB(2). Sympathetic nerve-induced tachycardia in rat and mouse atria, and rat mesenteric artery smooth muscle contractile responses to perivascular nerve stimulation, were not inhibited by Delta(9)-tetrahydrocannabinol, CP 55,940 or anandamide up to 1 microM. These data indicate that cannabinoid CB(1) receptor activation inhibits sympathetic neurotransmission only in the mouse vas deferens and thus point to species and regional differences in cannabinoid CB(1) receptor involvement in pre-synaptic inhibition of sympathetic neurotransmission and CP 55,940 may have inhibitory actions in rat vas deferens unrelated to cannabinoid receptor activity.
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Affiliation(s)
- L Lay
- Department of Pharmacology, University of Melbourne, Parkville, Victoria 3010, Australia
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14
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Bousquet E, Khitri M, Lay L, Nicotra F, Panza L, Russo G. Capsular polysaccharide of Streptococcus pneumoniae type 19F: synthesis of the repeating unit. Carbohydr Res 1998; 311:171-81. [PMID: 9825520 DOI: 10.1016/s0008-6215(98)00218-3] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.8] [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: 10/17/2022]
Abstract
A new and more versatile synthesis of beta-D-ManpNAc-(1-->4)-alpha-D-Glcp-(1-->2)-alpha-L-Rhap, the trisaccharide repeating unit of the Streptococcus pneumoniae type 19F capsular polysaccharide, is described. The present approach allows a simple access to different fragments containing the trisaccharide and the conjugation of the product(s) to a protein through the selective manipulation of the anomeric position at the reducing end and of the HO-4 function at the nonreducing end. The synthetic scheme shows an efficient application of the sulfoxide method for the stereoselective and high yielding formation of the glycosidic linkages.
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Affiliation(s)
- E Bousquet
- Istituto di Chimica Farmaceutica e Toss., Catania, Italy
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15
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Lay L, Manzoni L, Schmidt RR. Synthesis of N-acetylglucosamine containing Lewis A and Lewis X building blocks based on N-tetrachlorophthaloyl protection--synthesis of Lewis X pentasaccharide. Carbohydr Res 1998; 310:157-71. [PMID: 9809410 DOI: 10.1016/s0008-6215(98)00148-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [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: 10/18/2022]
Abstract
Phenyl 6-O-benzyl-2-deoxy-2-tetrachlorophthalimido-1-thio-beta-D- glucopyranoside (5a) and thexyldimethylsilyl 6-O-benzyl-2-deoxy-2-tetrachlorophthalimido-beta-D- glucopyranoside (5b) gave with O-(2,3,4,6-tetra-O-acetyl-alpha-D-galactopyranosyl)trichloroacetimida te (8) in the presence of BF3.Et2O as catalyst exclusively lactosamine derivatives 7a and 7b, respectively, in high yields. Ensuing reaction with O-(3, 4-di-O-acetyl-2-O-benzyl-alpha-L-fucopyranosyl) trichloroacetimidate (9) in the presence of TMSOTf as catalyst afforded Le(x) trisaccharide intermediates 10a,b. With fucosyl donor 9 and 5a,b as acceptors in the presence of TMSOTf as catalyst glycosylation either at the 3-O or the 4-O was observed, thus leading to mixtures of disaccharides 11a/12a and 11b/12b, respectively; their reaction with 8 furnished Le(x) trisaccharide intermediates 10a,b and Le(a) trisaccharide intermediates 14a,b. Transformation of 10b into the corresponding trichloroacetimidate 17 and reaction with lactose acceptor 19 in the presence of Zn(OTf)2 as catalyst gave protected Le(x) pentasaccahride intermediate 21, which on deprotection led to unprotected Le(x) pentasaccharide 1.
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Affiliation(s)
- L Lay
- Fakultät Chemie, Universität Konstanz, Germany
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16
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Abstract
Lactose was readily transformed into thexyldimethylsilyl (3,4-O-isopropylidene-beta-D-galactopyranosyl)-(1-->4)-beta- D-glucopyranoside (5); this compound served as intermediate for the generation of partially O-protected lactose building blocks required in oligosaccharide and glycoconjugate synthesis. Thus, from 5 via per-O-benzoylation, desilylation, trichloroacetimidate formation, glycosylation of the Lemieux spacer, and acid-catalyzed de-O-isopropylidenation methoxycarbonyloctyl (2,6-di-O-benzoyl-beta-D-galactopyranosyl)- (1-->4)-2,3,6-tri-O-benzoyl-beta-D-glucopyranoside (12) was obtained. Regioselective benzoylation of 5 with benzoyl cyanide under various conditions afforded 3-O- (13), 2,3,2'-O- (14), 3,2'-O- (16), and 2,2'-O-unprotected (17) lactoside, respectively. De-O-isopropylidenation of 16 gave thexyldimethylsilyl (6-O-benzoyl-beta-D-galactopyranosyl)-(1-->4)-2, 6-di-O-benzoyl-beta-D-glucopyranoside (18), an important 2',3',4'-O-unprotected lactose derivative. Fucosylation of 13 and then de-O-isopropylidenation afforded thexyldimethylsilyl 2,6-di-O-benzoyl-beta-D-galactopyranosyl)-(1-->4)-[(3,4-di-O-acetyl-2-O- benzoyl-alpha-L-fucopyranosyl)-(1-->3)]-2,6-di-O-benzoyl-beta-D- glucopyranoside (21), an important fucosyllactose building block.
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Affiliation(s)
- L Lay
- Fakultät für Chemie, Universität Konstanz, Germany
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17
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Cipolla L, Nicotra F, Lay L, Lindahl U, Panza L, Russo G. Synthesis of the disaccharides methyl 4-O-(2'/3'-O-sulfo-beta-D-glucopyranosyluronic acid)-2-amino-2-deoxy-alpha-D-glucopyranoside disodium salts, related to heparin biosynthesis. Glycoconj J 1996; 13:995-1003. [PMID: 8981091 DOI: 10.1007/bf01053195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 02/03/2023]
Abstract
The synthesis of the disaccharides methyl 4-O-(2'/3'-O-sulfo-beta-D-glucopyranosyluronic acid)-2-amino-2-deoxy-alpha-D-glucopyranoside 3 and 4 as disodium salts is described. Allyl 4,6-O-benzylidene-alpha-D-glucopyranoside 6 was converted to trichloroacetimidate 20. Glycosylation of 20 with 5 promoted by BF3.OEt2 gave disaccharide 21. Deacetylation of 21 followed by monoacetylation of the resultant diol 22 afforded the two monoacetylated disaccharides 23 and 24. Sulfation and deprotection of each disaccharide gave the desired sulfated compounds 3 and 4.
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Affiliation(s)
- L Cipolla
- Dipartimento di Chimica Organica e Industriale, Università di Milano, Italy
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18
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Lay L. Regioselective acylation of disaccharides by enzymatic transesterification. Carbohydr Res 1996. [DOI: 10.1016/0008-6215(96)00157-7] [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] [Indexed: 10/17/2022]
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19
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Razi N, Kreuger J, Lay L, Russo G, Panza L, Lindahl B, Lindahl U. Identification of O-sulphate substituents on D-glucuronic acid units in heparin-related glycosaminoglycans using novel synthetic disaccharide standards. Glycobiology 1995; 5:807-11. [PMID: 8720079 DOI: 10.1093/glycob/5.8.807] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [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: 02/01/2023] Open
Abstract
The two disaccharides, methyl 4-O-(2-O-sulpho-beta-D-glucopyranosyl-uronic acid)-2-deoxy-2-amino-alpha-D-glucopyranoside and methyl 4-O-(3-O-sulpho-beta-D-glucopyranosyluronic acid)-2-deoxy-2-amino-alpha-D-glucopyranoside, were prepared by de novo synthesis, and converted to the corresponding 2,5-anhydro-D-[1-3H]mannitol derivatives by deamination with nitrous acid followed by reduction with NaB3H4. The resultant labelled products were used as standards in the identification, by anion-exchange high-performance liquid chromatography (HPLC), of disaccharides generated by HNO2/NaB3H4 treatment of heparan sulphate isolated from human brain. The two standards, containing 2-O- and 3-O-sulphated glucuronic acid, respectively, were clearly separated by the HPLC procedure. Comparison with the deamination products derived from heparan sulphate showed that the mono-O-sulphated disaccharide species containing a sulphated glucuronic acid unit co-eluted with the 2-O-sulphated standard. The corresponding component isolated from other heparan sulphate preparations, or from heparin, also eluted at the same position. No disaccharide derived from heparin or heparan sulphate appeared at the elution position of the 3-O-sulphated standard. It is concluded that D-glucuronic acid units in heparin-related glycosaminoglycans may be sulphated at C2, whereas no evidence has been found for sulphation at C3. By contrast, analysis of mono-O-sulphated disaccharides derived from a chemically sulphated, bacterial capsular polysaccharide (generated by Escherichia coli K5) clearly demonstrated the occurrence of O-sulphate groups at C-3 of D-glucuronic acid units.
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Affiliation(s)
- N Razi
- Department of Medical and Physiological Chemistry, University of Uppsala, The Biomedical Center, Sweden
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20
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Lay L, Zamboni WA, Texter JH, Zook EG. Analysis of hypospadias and fistula repair. Am Surg 1995; 61:537-8. [PMID: 7762905] [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: 01/27/2023]
Abstract
A total of 83 children underwent hypospadias repair from 1977 to 1991. The method of repair was based on individual patient pathology. Meatal advancement and glanuloplasty repair (MAGPI) was the most common operation performed (n = 37) followed by flip flap (n = 19), free tube graft (n = 11), and vascularized tube graft (n = 16). Fistula formation was the most common complication, with an overall incidence of 16 per cent. Fifty-four per cent of fistulas occurred following free tube graft urethroplasties, and 25 per cent of fistulas were noted following vascularized tube graft procedures. After 1986 the fistula rate decreased to 11 per cent in vascularized tube grafts, indicating a learning curve for this procedure. Seventy per cent of all fistulas required uncomplicated surgical repair, and 30 per cent closed spontaneously. We present our experience involving hypospadias repair, fistula formation, and management with an emphasis on penile hypospadias.
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Affiliation(s)
- L Lay
- Division of Urology, Southern Illinois University School of Medicine, Springfield, USA
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21
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Abstract
This prospective study evaluated the clinical usefulness of provocative testing in 32 subjects with electrodiagnostically proven cubital tunnel syndrome and 33 control subjects. Four provocative tests were included: Tinel's sign, elbow flexion, pressure provocation, and combined elbow flexion and pressure provocation. The mean age of the control group was 41 years and 46 years for the group with cubital tunnel syndrome. In the control group, provocative tests were rarely positive. In 44 extremities with cubital tunnel syndrome, 31 had a Tinel's sign, 33 had a positive elbow flexion test, 39 had symptoms with pressure only, and 41 had symptoms with a combination of pressure provocation and elbow flexion testing. The sensitivity of the Tinel sign was 0.70, and at 30 seconds, the sensitivities of the other provocative tests were: elbow flexion (0.32), pressure provocation (0.55), and pressure-flexion test (0.91). The most sensitive provocative test in the diagnosis of cubital tunnel syndrome was elbow flexion when combined with pressure on the ulnar nerve.
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Affiliation(s)
- C B Novak
- Division of Plastic and Reconstructive Surgery, Washington University School of Medicine, St. Louis, MO
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22
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Bousquet E, Lay L, Nicotra F, Panza L, Russo G, Tirendi S. Synthesis of 3- and 4-deoxy derivatives of L-rhamnose from 1,2-O-(1-methoxyethylidene)-beta-L-rhamnopyranose. Carbohydr Res 1994; 257:317-22. [PMID: 8013011 DOI: 10.1016/0008-6215(94)80045-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- E Bousquet
- Dipartimento di Chimica Organica e Industriale, Centro per lo Studio delle Sostanze Organiche Naturali del CNR, Milano, Italy
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23
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Abstract
The first reported case of bilateral pyoderma gangrenosum of the hands is presented. One lesion was treated with wound care only, with spontaneous healing after two months. The contralateral lesion which occurred one month later was treated with wound care and oral dapsone. Healing occurred between four and six weeks after the start of dapsone. It is suggested that this acts by limiting the necrotizing process, thus allowing earlier epithelialization. Pyoderma gangrenosum is rare, and treatment is non-surgical. It is important that it is recognized to avoid extension of the necrotizing process through ill-advised surgery.
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Affiliation(s)
- R E Brown
- Division of Plastic Surgery, Southern Illinois University School of Medicine, Springfield
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24
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Schölmerich J, Lausen M, Lay L, Salm R, Rückauer K, Gross V, Roth M, Leser HG, Farthmann EH. Value of endoscopic retrograde cholangiopancreatography in determining the cause but not course of acute pancreatitis. Endoscopy 1992; 24:244-7. [PMID: 1612037 DOI: 10.1055/s-2007-1010475] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [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: 12/27/2022]
Abstract
We have recently shown that ERCP is the most useful technique for detecting a biliary origin of acute pancreatitis and can be done without side effects. We now report on a second series of 50 patients with acute pancreatitis in whom ERCP, computed tomography (CT), ultrasound (US), and clinical and laboratory assessment were performed within the first 24 to 48 hours of hospitalization. A score for ERCP, CT and US was used to assess the severity of the disease. Patients were followed up until discharge or death and their condition classified according to outcome as mild (less than or equal to 1 complication), severe (greater than 1 complication) or fatal. ERCP was superior in detecting choledochal stones (ERCP 100%, US 25%, CT 50%) and dilated intrahepatic ducts (ERCP 75%, US 75%, CT 37%) but not gallbladder stones (ERCP 70%, US 100%, CT 60%). When the ERCP severity score was calculated there was no relevant difference between patients thereafter having a mild course (0.66 +/- 0.91, range 0-3), a severe course (1.3 +/- 0.80, range 0-3), or a fatal outcome (1.0 +/- 1.1, range 0-3). In contrast, the CT score was different in all three groups (mild: 3.0 +/- 1.9; severe: 5.3 +/- 3.2; lethal: 6.3 +/- 3.1) as was the US score (mild: 1.5 +/- 1.3; severe: 3.2 +/- 2.3; lethal: 4.4 +/- 1.4). It is concluded from these results that ERCP is of value in defining the origin of acute pancreatitis. When a biliary origin is detected this can lead to immediate treatment using endoscopic sphincterotomy.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J Schölmerich
- Department of Internal Medicine, University of Freiburg, Germany
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25
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Gross V, Schölmerich J, Leser HG, Salm R, Lausen M, Rückauer K, Schöffel U, Lay L, Heinisch A, Farthmann EH. Granulocyte elastase in assessment of severity of acute pancreatitis. Comparison with acute-phase proteins C-reactive protein, alpha 1-antitrypsin, and protease inhibitor alpha 2-macroglobulin. Dig Dis Sci 1990; 35:97-105. [PMID: 1688526 DOI: 10.1007/bf01537230] [Citation(s) in RCA: 117] [Impact Index Per Article: 3.4] [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: 12/28/2022]
Abstract
Complexes of granulocyte elastase and alpha 1-antitrypsin are markers for granulocyte activation. In 75 patients with acute pancreatitis these complexes were immunologically determined daily in plasma during the first week of hospitalization. Patients were classified into three groups: mild pancreatitis (I, less than or equal to 1 complication, N = 34), severe pancreatitis (II, greater than or equal to 2 complications, N = 29), lethal outcome (III, N = 12). Initially, granulocyte elastase (mean +/- SEM) was lower in group I (348 +/- 39 micrograms/liter) as compared to groups II (897 +/- 183 micrograms/l) and III (799 +/- 244 micrograms/liter), P less than 0.001 for I vs II + III. Initial elastase concentrations greater than 400 micrograms/liter were consistent with a severe or fatal course of the disease but did not distinguish between severe and lethal pancreatitis. In patients with mild or severe disease, mean elastase concentrations decreased continuously during the following days (197 +/- 15 micrograms/liter in mild cases, 325 +/- 30 micrograms/liter in severe cases at day 7). In patients with lethal disease, however, mean elastase concentrations even increased at day 2 and remained higher than 700 micrograms/liter during the observation period. At days 1 and 2 the predictive value for severe or lethal disease of raised (greater than 400 micrograms/liter) elastase concentrations [positive predictive value (PPV) 82%, negative predictive value (NPV) 81%] was better than that of elevated (greater than 100 mg/liter) C-reactive protein (PPV 73%, NPV 73%), elevated (greater than 4.0 g/liter) alpha 1-antitrypsin (PPV 59%, NPV 50%), or decreased (less than 1.5 g/liter) alpha 2-macroglobulin (PPV 82%, NPV 67%).(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- V Gross
- Department of Internal Medicine, University of Freibur, FRG
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