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Sánchez-Castillo A, Heylen E, Hounjet J, Savelkouls KG, Lieuwes NG, Biemans R, Dubois LJ, Reynders K, Rouschop KM, Vaes RDW, De Keersmaecker K, Lambrecht M, Hendriks LEL, De Ruysscher DKM, Vooijs M, Kampen KR. Correction: Targeting serine/glycine metabolism improves radiotherapy response in non-small cell lung cancer. Br J Cancer 2024; 130:701. [PMID: 38347097 PMCID: PMC10876673 DOI: 10.1038/s41416-024-02603-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2024] Open
Affiliation(s)
- Anaís Sánchez-Castillo
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Elien Heylen
- Department of Oncology, Laboratory for Disease Mechanisms in Cancer, KU Leuven, and Leuven Cancer Institute (LKI), Herestraat 49, 3000, Leuven, Belgium
| | - Judith Hounjet
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Kim G Savelkouls
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Natasja G Lieuwes
- Department of Precision Medicine, The M-Lab, GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
| | - Rianne Biemans
- Department of Precision Medicine, The M-Lab, GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
| | - Ludwig J Dubois
- Department of Precision Medicine, The M-Lab, GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
| | - Kobe Reynders
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
- Department of Oncology, Experimental Radiation Oncology, KU Leuven, and Leuven Cancer Institute (LKI), Herestraat 49, 3000, Leuven, Belgium
| | - Kasper M Rouschop
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Rianne D W Vaes
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Kim De Keersmaecker
- Department of Oncology, Laboratory for Disease Mechanisms in Cancer, KU Leuven, and Leuven Cancer Institute (LKI), Herestraat 49, 3000, Leuven, Belgium
| | - Maarten Lambrecht
- Department of Radiation Oncology, University Hospital Leuven, Leuven, Belgium
| | - Lizza E L Hendriks
- Department of Pulmonology, GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Dirk K M De Ruysscher
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Marc Vooijs
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Kim R Kampen
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands.
- Department of Oncology, Laboratory for Disease Mechanisms in Cancer, KU Leuven, and Leuven Cancer Institute (LKI), Herestraat 49, 3000, Leuven, Belgium.
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Sánchez-Castillo A, Heylen E, Hounjet J, Savelkouls KG, Lieuwes NG, Biemans R, Dubois LJ, Reynders K, Rouschop KM, Vaes RDW, De Keersmaecker K, Lambrecht M, Hendriks LEL, De Ruysscher DKM, Vooijs M, Kampen KR. Targeting serine/glycine metabolism improves radiotherapy response in non-small cell lung cancer. Br J Cancer 2024; 130:568-584. [PMID: 38160212 PMCID: PMC10876524 DOI: 10.1038/s41416-023-02553-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 12/01/2023] [Accepted: 12/11/2023] [Indexed: 01/03/2024] Open
Abstract
BACKGROUND Lung cancer is the most lethal cancer, and 85% of cases are classified as non-small cell lung cancer (NSCLC). Metabolic rewiring is a cancer hallmark that causes treatment resistance, and lacks insights into serine/glycine pathway adaptations upon radiotherapy. METHODS We analyzed radiotherapy responses using mass-spectrometry-based metabolomics in NSCLC patient's plasma and cell lines. Efficacy of serine/glycine conversion inhibitor sertraline with radiotherapy was investigated by proliferation, clonogenic and spheroid assays, and in vivo using a serine/glycine dependent NSCLC mouse model by assessment of tumor growth, metabolite and cytokine levels, and immune signatures. RESULTS Serine/glycine pathway metabolites were significantly consumed in response to radiotherapy in NSCLC patients and cell models. Combining sertraline with radiotherapy impaired NSCLC proliferation, clonogenicity and stem cell self-renewal capacity. In vivo, NSCLC tumor growth was reduced solely in the sertraline plus radiotherapy combination treatment group. Tumor weights linked to systemic serine/glycine pathway metabolite levels, and were inhibited in the combination therapy group. Interestingly, combination therapy reshaped the tumor microenvironment via cytokines associated with natural killer cells, supported by eradication of immune checkpoint galectin-1 and elevated granzyme B levels. CONCLUSION Our findings highlight that targeting serine/glycine metabolism using sertraline restricts cancer cell recovery from radiotherapy and provides tumor control through immunomodulation in NSCLC.
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Affiliation(s)
- Anaís Sánchez-Castillo
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Elien Heylen
- Department of Oncology, Laboratory for Disease Mechanisms in Cancer, KU Leuven, and Leuven Cancer Institute (LKI), Herestraat 49, 3000, Leuven, Belgium
| | - Judith Hounjet
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Kim G Savelkouls
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Natasja G Lieuwes
- Department of Precision Medicine, The M-Lab, GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
| | - Rianne Biemans
- Department of Precision Medicine, The M-Lab, GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
| | - Ludwig J Dubois
- Department of Precision Medicine, The M-Lab, GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
| | - Kobe Reynders
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
- Department of Oncology, Experimental Radiation Oncology, KU Leuven, and Leuven Cancer Institute (LKI), Herestraat 49, 3000, Leuven, Belgium
| | - Kasper M Rouschop
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Rianne D W Vaes
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Kim De Keersmaecker
- Department of Oncology, Laboratory for Disease Mechanisms in Cancer, KU Leuven, and Leuven Cancer Institute (LKI), Herestraat 49, 3000, Leuven, Belgium
| | - Maarten Lambrecht
- Department of Radiation Oncology, University Hospital Leuven, Leuven, Belgium
| | - Lizza E L Hendriks
- Department of Pulmonology, GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Dirk K M De Ruysscher
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Marc Vooijs
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Kim R Kampen
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands.
- Department of Oncology, Laboratory for Disease Mechanisms in Cancer, KU Leuven, and Leuven Cancer Institute (LKI), Herestraat 49, 3000, Leuven, Belgium.
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Abstract
Cancer cells reprogramme their metabolism to support unrestrained proliferation and survival in nutrient-poor conditions. Whereas non-transformed cells often have lower demands for serine and glycine, several cancer subtypes hyperactivate intracellular serine and glycine synthesis and become addicted to de novo production. Copy-number amplifications of serine- and glycine-synthesis genes and genetic alterations in common oncogenes and tumour-suppressor genes enhance serine and glycine synthesis, resulting in high production and secretion of these oncogenesis-supportive metabolites. In this Review, we discuss the contribution of serine and glycine synthesis to cancer progression. By relying on de novo synthesis pathways, cancer cells are able to enhance macromolecule synthesis, neutralize high levels of oxidative stress and regulate methylation and tRNA formylation. Furthermore, we discuss the immunosuppressive potential of serine and glycine, and the essentiality of both amino acids to promoting survival of non-transformed neighbouring cells. Finally, we point to the emerging data proposing moonlighting functions of serine- and glycine-synthesis enzymes and examine promising small molecules targeting serine and glycine synthesis.
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Affiliation(s)
- Shauni L Geeraerts
- Laboratory for Disease Mechanisms in Cancer, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium
| | - Elien Heylen
- Laboratory for Disease Mechanisms in Cancer, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium
| | - Kim De Keersmaecker
- Laboratory for Disease Mechanisms in Cancer, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium.
| | - Kim R Kampen
- Laboratory for Disease Mechanisms in Cancer, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium.
- Maastricht University Medical Centre, Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Developmental Biology, Maastricht, The Netherlands.
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Geeraerts SL, Kampen KR, Rinaldi G, Gupta P, Planque M, Louros N, Heylen E, De Cremer K, De Brucker K, Vereecke S, Verbelen B, Vermeersch P, Schymkowitz J, Rousseau F, Cassiman D, Fendt SM, Voet A, Cammue BPA, Thevissen K, De Keersmaecker K. Repurposing the Antidepressant Sertraline as SHMT Inhibitor to Suppress Serine/Glycine Synthesis-Addicted Breast Tumor Growth. Mol Cancer Ther 2021; 20:50-63. [PMID: 33203732 PMCID: PMC7611204 DOI: 10.1158/1535-7163.mct-20-0480] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/19/2020] [Accepted: 11/03/2020] [Indexed: 11/16/2022]
Abstract
Metabolic rewiring is a hallmark of cancer that supports tumor growth, survival, and chemotherapy resistance. Although normal cells often rely on extracellular serine and glycine supply, a significant subset of cancers becomes addicted to intracellular serine/glycine synthesis, offering an attractive drug target. Previously developed inhibitors of serine/glycine synthesis enzymes did not reach clinical trials due to unfavorable pharmacokinetic profiles, implying that further efforts to identify clinically applicable drugs targeting this pathway are required. In this study, we aimed to develop therapies that can rapidly enter the clinical practice by focusing on drug repurposing, as their safety and cost-effectiveness have been optimized before. Using a yeast model system, we repurposed two compounds, sertraline and thimerosal, for their selective toxicity against serine/glycine synthesis-addicted breast cancer and T-cell acute lymphoblastic leukemia cell lines. Isotope tracer metabolomics, computational docking, enzymatic assays, and drug-target interaction studies revealed that sertraline and thimerosal inhibit serine/glycine synthesis enzymes serine hydroxymethyltransferase and phosphoglycerate dehydrogenase, respectively. In addition, we demonstrated that sertraline's antiproliferative activity was further aggravated by mitochondrial inhibitors, such as the antimalarial artemether, by causing G1-S cell-cycle arrest. Most notably, this combination also resulted in serine-selective antitumor activity in breast cancer mouse xenografts. Collectively, this study provides molecular insights into the repurposed mode-of-action of the antidepressant sertraline and allows to delineate a hitherto unidentified group of cancers being particularly sensitive to treatment with sertraline. Furthermore, we highlight the simultaneous inhibition of serine/glycine synthesis and mitochondrial metabolism as a novel treatment strategy for serine/glycine synthesis-addicted cancers.
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Affiliation(s)
- Shauni Lien Geeraerts
- Laboratory for Disease Mechanisms in Cancer, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium
- Centre of Microbial and Plant Genetics - Plant Fungi Interactions (CMPG-PFI), KU Leuven, Heverlee, Belgium
| | - Kim Rosalie Kampen
- Laboratory for Disease Mechanisms in Cancer, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium
- Maastricht University Medical Center, Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Developmental Biology, Maastricht, the Netherlands
| | - Gianmarco Rinaldi
- Laboratory of Cellular Metabolism and Metabolic Regulation, VIB-KU Leuven Center for Cancer Biology, VIB Leuven, Leuven, Belgium
- Laboratory of Cellular Metabolism and Metabolic Regulation, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium
| | - Purvi Gupta
- Department of Chemistry, KU Leuven, Heverlee, Belgium
| | - Mélanie Planque
- Laboratory of Cellular Metabolism and Metabolic Regulation, VIB-KU Leuven Center for Cancer Biology, VIB Leuven, Leuven, Belgium
- Laboratory of Cellular Metabolism and Metabolic Regulation, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium
| | - Nikolaos Louros
- Switch Laboratory, VIB Center for Brain and Disease Research, VIB-KU Leuven, Leuven, Belgium
- Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Elien Heylen
- Laboratory for Disease Mechanisms in Cancer, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium
| | - Kaat De Cremer
- Centre of Microbial and Plant Genetics - Plant Fungi Interactions (CMPG-PFI), KU Leuven, Heverlee, Belgium
| | - Katrijn De Brucker
- Centre of Microbial and Plant Genetics - Plant Fungi Interactions (CMPG-PFI), KU Leuven, Heverlee, Belgium
| | - Stijn Vereecke
- Laboratory for Disease Mechanisms in Cancer, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium
| | - Benno Verbelen
- Laboratory for Disease Mechanisms in Cancer, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium
| | - Pieter Vermeersch
- Department of Cardiovascular Sciences, University Hospitals Leuven, Leuven, Belgium
| | - Joost Schymkowitz
- Switch Laboratory, VIB Center for Brain and Disease Research, VIB-KU Leuven, Leuven, Belgium
- Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Frederic Rousseau
- Switch Laboratory, VIB Center for Brain and Disease Research, VIB-KU Leuven, Leuven, Belgium
- Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - David Cassiman
- Department of Hepatology, University Hospitals Leuven, Leuven, Belgium
| | - Sarah-Maria Fendt
- Laboratory of Cellular Metabolism and Metabolic Regulation, VIB-KU Leuven Center for Cancer Biology, VIB Leuven, Leuven, Belgium
- Laboratory of Cellular Metabolism and Metabolic Regulation, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium
| | - Arnout Voet
- Department of Chemistry, KU Leuven, Heverlee, Belgium
| | - Bruno P A Cammue
- Centre of Microbial and Plant Genetics - Plant Fungi Interactions (CMPG-PFI), KU Leuven, Heverlee, Belgium
| | - Karin Thevissen
- Centre of Microbial and Plant Genetics - Plant Fungi Interactions (CMPG-PFI), KU Leuven, Heverlee, Belgium.
| | - Kim De Keersmaecker
- Laboratory for Disease Mechanisms in Cancer, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Leuven, Belgium.
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5
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Kint NG, Heylen E, Pepe D, De Keersmaecker K, Verfaillie CM, Delforge M. Carfilzomib-induced reticulocytosis in patients with multiple myeloma is caused by impaired terminal erythroid maturation. Leukemia 2019; 34:651-655. [PMID: 31467428 DOI: 10.1038/s41375-019-0565-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/04/2019] [Accepted: 07/17/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Nicolas G Kint
- Department of Internal Medicine-Hematology, University Hospitals Leuven, Leuven, Belgium. .,Stem Cell Institute Leuven, KU Leuven, Leuven, Belgium.
| | - Elien Heylen
- Department of Internal Medicine-Hematology, University Hospitals Leuven, Leuven, Belgium.,Stem Cell Institute Leuven, KU Leuven, Leuven, Belgium.,Laboratory for Disease Mechanisms in Cancer, KU Leuven, Leuven, Belgium
| | - Daniele Pepe
- Laboratory for Disease Mechanisms in Cancer, KU Leuven, Leuven, Belgium
| | | | | | - Michel Delforge
- Department of Internal Medicine-Hematology, University Hospitals Leuven, Leuven, Belgium.,Stem Cell Institute Leuven, KU Leuven, Leuven, Belgium
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6
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Navani-Vazirani S, Heylen E, Deardorff J, Srikrishnan AK, Vasudevan CK, Solomon D, Ekstrand ML. The Role of Sex Work Pay in Moderating the Effect of Mobile Phone Solicitation on Condom Practices: An Analysis of Female Sex Workers in India. ACTA ACUST UNITED AC 2017; 4. [PMID: 29202126 DOI: 10.24966/acrs-7370/100008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 12/28/2022]
Abstract
Mobile phones remain a largely untapped resource in the ongoing challenge to address Female Sex Worker (FSW) health, including HIV prevention services, in India. An important step towards designing effective mobile phone-based initiatives for FSWs is clarifying the contextual influences of mobile phone solicitation on sexual risk behavior. In this paper, we extend previously identified associations between mobile phone solicitation and condom practices by examining whether this association is moderated by sex work pay and offer key considerations for future research and implementation. Specifically, we conducted an analysis among 589 Indian FSWs, where FSWs who did not use mobile phones to solicit clients had the lowest mean sex work pay (INR 394/ USD 6.54) compared to FSWs who used both mobile and traditional strategies (INR 563/ USD 9.34). Our analysis indicate low paid FSWs who used mobile phones concurrently with traditional strategies had 2.46 times higher odds of inconsistent condom use compared to low paid FSWs who did not use mobile phones for client solicitation. No such effect was identified among high paid FSWs. These findings also identified group level differences among FSWs reporting different mobile phone solicitation strategies, including violence, client condom use and HIV status. Our results indicate that low pay does moderate the association between mobile phone solicitation and condom practices, but only among a sub-set of low paid FSWs. These findings also demonstrate the utility of classification by different mobile phone solicitation strategies for accurate assessment of sexual risk among mobile phone soliciting FSWs. In turn, this paves the way for novel approaches to utilize mobile phones for FSW HIV prevention. We discuss one such example, a mobile phone-based rapid screening tool for acute HIV infection targeting Indian FSWs.
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Affiliation(s)
| | - E Heylen
- Center for AIDS Prevention, University of California, San Francisco, California, USA
| | - J Deardorff
- School of Public Health, University of California, Berkeley, USA
| | - A K Srikrishnan
- YR Gaitonde Centre for AIDS Research and Education (YRG CARE), Chennai, Tamil Nadu, India
| | - C K Vasudevan
- YR Gaitonde Centre for AIDS Research and Education (YRG CARE), Chennai, Tamil Nadu, India
| | - D Solomon
- SHADOWS, Chirala, Andhra Pradesh, India
| | - M L Ekstrand
- School of Public Health, University of California, Berkeley, USA.,Center for AIDS Prevention, University of California, San Francisco, California, USA.,St. John's Research Institute, Bangalore, Karnataka, India
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7
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Vega C, Conceição-Neto N, Miño S, Zeller M, Heylen E, Parreño V, Barrandeguy M, Matthijnssens J. Novel viruses determined using fecal virome analysis in the feces of foals with diarrea. J Equine Vet Sci 2016. [DOI: 10.1016/j.jevs.2016.02.050] [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: 11/30/2022]
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8
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Navani-Vazirani S, Solomon D, Krishnan G, Heylen E, Srikrishnan AK, Vasudevan CK, Ekstrand ML. Mobile phones and sex work in South India: the emerging role of mobile phones in condom use by female sex workers in two Indian states. Cult Health Sex 2014; 17:252-265. [PMID: 25301669 PMCID: PMC4425944 DOI: 10.1080/13691058.2014.960002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The aim of this study was to examine female sex workers' solicitation of clients using mobile phones and the association between this and condom use with clients. Cross-sectional data were utilised to address the study's aim, drawing on data collected from female sex workers in Calicut, Kerala, and Chirala, Andhra Pradesh. Use of mobile phone solicitation was reported by 46.3% (n = 255) of Kerala participants and 78.7% (n = 464) of those in Andhra Pradesh. Kerala participants reporting exclusive solicitation using mobile phones demonstrated 1.67 times higher odds (95% CI: 1.01-2.79) of inconsistent condom use than those reporting non-use of mobile phones for solicitation. However, those reporting exclusive solicitation through mobile phones in Andhra Pradesh reported lower odds of inconsistent condom use (OR: 0.03; 95% CI: 0.01-0.26) than those not using mobile phones for solicitation. Findings indicate that solicitation of clients using mobile phones facilitates or hampers consistency in condom use with clients depending on the context, and how mobile phones are incorporated into solicitation practices. Variations in sex work environments, including economic dependence on sex work or lack thereof may partially account for the different effects found.
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Affiliation(s)
| | - D Solomon
- SHADOWS, Solomon Hospital, Chirala, India
| | | | - E Heylen
- Center for AIDS Prevention Studies, University of California, San Francisco, USA
| | - AK Srikrishnan
- Y.R. Gaitonde Centre for AIDS Research and Education, ChennaiIndia
| | - CK Vasudevan
- Y.R. Gaitonde Centre for AIDS Research and Education, ChennaiIndia
| | - ML Ekstrand
- Center for AIDS Prevention Studies, University of California, San Francisco, USA
- St. John's Research Institute, Bangalore, India
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9
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Matthijnssens J, Zeller M, Heylen E, De Coster S, Vercauteren J, Braeckman T, Van Herck K, Meyer N, PirÇon JY, Soriano-Gabarro M, Azou M, Capiau H, De Koster J, Maernoudt AS, Raes M, Verdonck L, Verghote M, Vergison A, Van Damme P, Van Ranst M. Higher proportion of G2P[4] rotaviruses in vaccinated hospitalized cases compared with unvaccinated hospitalized cases, despite high vaccine effectiveness against heterotypic G2P[4] rotaviruses. Clin Microbiol Infect 2014; 20:O702-10. [DOI: 10.1111/1469-0691.12612] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 02/16/2014] [Accepted: 02/25/2014] [Indexed: 12/26/2022]
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10
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Ben Hadj Fredj M, Ben Hamida-Rebaï M, Zeller M, Heylen E, Van Ranst M, Matthijnssens J, Trabelsi A. Sequence and structural analyses of NSP4 proteins from human group A rotavirus strains detected in Tunisia. ACTA ACUST UNITED AC 2014; 62:146-51. [PMID: 24679587 DOI: 10.1016/j.patbio.2013.10.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 06/10/2013] [Accepted: 10/08/2013] [Indexed: 12/15/2022]
Abstract
BACKGROUND The NSP4 protein of group A rotavirus (RVA) has been recognized as a viral enterotoxin and plays important roles in viral pathogenesis and morphogenesis. Domains involved in structural and functional interactions have been proposed mainly based on the simian SA11 strain. METHODS NSP4 has been classified into 15 different genotypes (E1-E15), and the aim of this study was to analyze the sequences of 46 RVA strains in order to determine the aminoacid (aa) differences between E1 and E2 genotypes. Another aspect was to characterize the structural and physicochemical properties of these strains. RESULTS Comparison of deduced aa sequences of the NSP4 protein showed that divergences between NSP4 genotypes E1 and E2 were mostly observed in the VP4-binding, the interspecies variable domain (ISVD) and the double-layered particle (DLP) binding domains. Interestingly, uncommon variations in residues 131 and 138, which are known to be important aa in pathogenesis, were found in one unusual animal derived strain belonging to the E2 genotype. Concerning the structural aspect, no significant differences were noted. CONCLUSION The presence of punctual aa variations in the NSP4 genotypes may indicate that NSP4 mutates mainly via accumulation of point mutations.
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Affiliation(s)
- M Ben Hadj Fredj
- UR06SP20, Laboratory of Microbiology, Sahloul University Hospital, 4054 Sousse, Tunisia; Faculty of Pharmacy, University of Monastir, avenue Avicenne, 5019 Monastir, Tunisia
| | - M Ben Hamida-Rebaï
- UR06SP20, Laboratory of Microbiology, Sahloul University Hospital, 4054 Sousse, Tunisia; Faculty of Pharmacy, University of Monastir, avenue Avicenne, 5019 Monastir, Tunisia
| | - M Zeller
- Laboratory of Clinical and Epidemiological Virology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, 1, place de l'Université, 1348 Louvain-La-Neuve, Belgium
| | - E Heylen
- Laboratory of Clinical and Epidemiological Virology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, 1, place de l'Université, 1348 Louvain-La-Neuve, Belgium
| | - M Van Ranst
- Laboratory of Clinical and Epidemiological Virology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, 1, place de l'Université, 1348 Louvain-La-Neuve, Belgium
| | - J Matthijnssens
- Laboratory of Clinical and Epidemiological Virology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, 1, place de l'Université, 1348 Louvain-La-Neuve, Belgium
| | - A Trabelsi
- UR06SP20, Laboratory of Microbiology, Sahloul University Hospital, 4054 Sousse, Tunisia; Faculty of Pharmacy, University of Monastir, avenue Avicenne, 5019 Monastir, Tunisia.
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Malavé S, Ramakrishna J, Heylen E, Bharat S, Ekstrand M. Differences in testing, stigma, and perceived consequences of stigmatization among heterosexual men and women living with HIV in Bengaluru, India. AIDS Care 2013; 26:396-403. [PMID: 23869716 PMCID: PMC4033403 DOI: 10.1080/09540121.2013.819409] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 06/20/2013] [Indexed: 10/26/2022]
Abstract
Approximately 2.4 million people in India are living with HIV. Gender inequality affects HIV prevention, detection, and management. The purpose of this paper was to describe gender differences in the experience of living with HIV in Bengaluru, India. A subsample of n = 313 (159 men and 154 women) from a larger cohort was used for these analyses. Participants were recruited through AIDS service organizations. They completed an interviewer-administered survey assessing HIV testing experience, types of stigma, and perceived consequences of stigmatization. The majority of men (67%) reported getting HIV tested because of illness, while women were more likely to be tested after learning their spouse's HIV-positive status (42%). More men (59%) than women (45%, p<0.05) were tested in private care settings. Men reported significantly higher mean levels of internalized stigma (men: M=0.71, SD = 0.63; women: M=0.46, SD = 0.55; p<0.001), whereas the women reported significantly higher scores for enacted stigma (men: M=1.30, SD = 1.69; women: M=2.10, SD = 2.17; p<0.001). These differences remained significant after controlling for potential socio-demographic covariates. Following their diagnosis, more women reported moving out of their homes (men: 16%; women: 26%; p<0.05). More men (89%) than women (66%; p<0.001) reported to have modified their sexual behavior after being diagnosed. These findings suggest that the experience of living with HIV and HIV stigma varies by gender in this population. Suggestions for a gender-based approach to HIV prevention and stigma reduction are provided.
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Affiliation(s)
- S. Malavé
- Department of Medicine, Center for AIDS Prevention Studies, University of California, San Francisco, Suite 1300, 50 Beale Street, San Francisco, CA 94105 USA
| | - J. Ramakrishna
- Department of Health Education, National Institute for Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - E. Heylen
- Department of Medicine, Center for AIDS Prevention Studies, University of California, San Francisco, Suite 1300, 50 Beale Street, San Francisco, CA 94105 USA
| | - S. Bharat
- Centre for Health and Social Sciences, School of Health Systems Studies, Tata Institute for Social Sciences, Mumbai, Maharashtra, India
| | - M.L. Ekstrand
- Department of Medicine, Center for AIDS Prevention Studies, University of California, San Francisco, Suite 1300, 50 Beale Street, San Francisco, CA 94105 USA
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Ianiro G, Heylen E, Delogu R, Zeller M, Matthijnssens J, Ruggeri F, Van Ranst M, Fiore L. Genetic diversity of G9P[8] rotavirus strains circulating in Italy in 2007 and 2010 as determined by whole genome sequencing. Infection, Genetics and Evolution 2013; 16:426-32. [DOI: 10.1016/j.meegid.2013.03.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 03/11/2013] [Accepted: 03/13/2013] [Indexed: 02/01/2023]
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Miño S, Matthijnssens J, Badaracco A, Garaicoechea L, Zeller M, Heylen E, Van Ranst M, Barrandeguy M, Parreño V. Equine G3P[3] rotavirus strain E3198 related to simian RRV and feline/canine-like rotaviruses based on complete genome analyses. Vet Microbiol 2012; 161:239-46. [PMID: 22959604 DOI: 10.1016/j.vetmic.2012.07.033] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 07/10/2012] [Accepted: 07/19/2012] [Indexed: 11/15/2022]
Abstract
Equine group A rotavirus (RVA) strains are the most important cause of gastroenteritis in equine neonates and foals worldwide, and G3P[12] and G14P[12] are epidemiologically the most important genotypes. The genotype constellation of an unusual Argentinean G3P[3] RVA strain (RVA/Horse-wt/E3198/2008/G3P[3]) detected in fecal samples of a diarrheic foal in 2008 was shown to be G3-P[3]-I3-R3-C3-M3-A9-N3-T3-E3-H6. Each of these genotypes has been found typically in feline and canine RVA strains, and the genotype constellation is reminiscent to those of Cat97-like RVA strains. However, the phylogenetic analyses revealed only a distant relationship between E3198 and known feline, canine and feline/canine-like human RVA strains. Surprisingly, a rather close relationship was found between E3198 and simian RVA strains RVA/Simian-tc/USA/RRV/1975/G3P[3] for at least 5 gene segments. RRV is believed to be a reassortant between a bovine-like RVA strain and a RVA strains distantly related to feline/canine RVA strains. These analyses indicate that E3198 is unlikely to be of equine origin, and most likely represents a RVA interspecies transmitted virus, possibly in combination with one or more reassortments, from a feline, canine or related host species to a horse. Further studies are in progress to evaluate if this strain was a single interspecies transmission event, or if this strain started to circulate in the equine population.
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Affiliation(s)
- S Miño
- Instituto de Virología, CICVyA, INTA Castelar, Buenos Aires, Argentina
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Heylen E, Willemse JL, Hendriks DF. Comparative study of commercially available procarboxypeptidase U (thrombin-activatable fibrinolysis inhibitor) assays. J Thromb Haemost 2011; 9:1407-9. [PMID: 21535389 DOI: 10.1111/j.1538-7836.2011.04325.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Brouns R, Heylen E, Willemse JL, Sheorajpanday R, De Surgeloose D, Verkerk R, De Deyn PP, Hendriks DF. The decrease in procarboxypeptidase U (TAFI) concentration in acute ischemic stroke correlates with stroke severity, evolution and outcome. J Thromb Haemost 2010; 8:75-80. [PMID: 19874466 DOI: 10.1111/j.1538-7836.2009.03663.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [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: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVES Procarboxypeptidase U (proCPU, TAFI) concentration in plasma is potentially related to thrombotic tendency, and elevated proCPU levels have been reported in ischemic stroke patients. Improved insight into the role of proCPU in acute ischemic stroke is essential for the development of more adequate therapeutics that may include carboxypeptidase inhibitors. In this study we investigated whether the plasma concentration of proCPU and the proCPU kinetic profile in acute ischemic stroke are related to initial stroke severity, stroke evolution in the subacute phase and long-term stroke outcome. METHODS Plasma concentration of proCPU was assessed in 136 stroke patients at admission (7.5 h after stroke onset), at 24 h, at 72 h and at day 7 after stroke onset. We evaluated the relation between change in proCPU concentrations and (a) stroke severity (patients with TIA vs. stroke patients, NIHSS score at admission), (b) stroke evolution (stroke progression, infarct volume at 72 h), and (c) stroke outcome (mRS score at month 3). RESULTS ProCPU concentration decreased significantly in the first 72 h after stroke onset and thereafter returned to baseline. This biphasic time course, with its nadir at 72 h, was more pronounced in patients with severe stroke, unfavourable stroke evolution in the first 72 h and poor long-term outcome. CONCLUSIONS The decrease in proCPU concentration in the first 72 h after stroke onset correlates with more severe stroke, unfavourable stroke evolution, and poor long-term stroke outcome.
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Affiliation(s)
- R Brouns
- Department of Neurology and Memory Clinic, ZNA Middelheim Hospital, Antwerp, Belgium
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Heylen E, Mansourati J, Thioub S, Saïag B, Guerrero F. Effect of exercise training on cutaneous microcirculation in rats. J Sports Med Phys Fitness 2008; 48:246-251. [PMID: 18427421] [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
AIM Exercise training is known to improve endothelium-dependent relaxation in the coronary and skeletal muscle arteries. However, the effects of exercise training on peripheral nonworking tissue, including microcirculation, are still unclear. Therefore, we investigated the effect of chronic and regular aerobic exercise on cutaneous microvascular endothelial function in rats. METHODS We assessed the effect of physical training on skin microcirculation in 7 sedentary (SED) and 21 training rats (Wistar-Kyoto), submitted to a treadmill training protocol (15 m/min; 15% incline; 60 min/day; 8 weeks). Training rats were divided into 3 groups, exercising 1 day/week (Ex1), 3 days/week (Ex3) or 5 days/week (Ex5). Cutaneous blood flow was recorded before the beginning of the training protocol, after 4 weeks and at the end of the training program. Hyperemic response (RH) was the flow reaction obtained after sudden release of the garrot. For data analysis, cutaneous vascular conductance (CVC) was indexed as cutaneous blood flow divided by mean arterial blood pressure (in millimeters of mercury, mmHg) and normalized to baseline values. RESULTS At baseline, CVC was not different among groups (SED or training) at 3 steps of experimental protocol. The hyperemic stimulus significantly increased normalized CVC only in group Ex3 after 4 weeks (P<0.006) and 8 weeks (P<0.006). CONCLUSION Exercise training exerts a generalized effect on the vasculature by increasing endothelial function in vessel beds different from those perfusing actively working muscle. However, some differences exist since training at a frequency of 3 bouts weekly only modifies cutaneous microcirculation.
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Affiliation(s)
- E Heylen
- Unit of Comparative and Integrative Physiology (E.A.3879), Vascular Endothelium Exercise Group, Nutrition Health and G.I.S. Movement Sciences, Brest, France.
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Willemse JL, Brouns R, Heylen E, De Deyn PP, Hendriks DF. Carboxypeptidase U (TAFIa) activity is induced in vivo in ischemic stroke patients receiving thrombolytic therapy. J Thromb Haemost 2008; 6:200-2. [PMID: 17944994 DOI: 10.1111/j.1538-7836.2007.02798.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Willemse JL, Heylen E, Hendriks DF. The intrinsic enzymatic activity of procarboxypeptidase U (TAFI) does not significantly influence the fibrinolysis rate: a rebuttal. J Thromb Haemost 2007; 5:1334-6. [PMID: 17403110 DOI: 10.1111/j.1538-7836.2007.02539.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Willemse JL, Matus V, Heylen E, Mezzano D, Hendriks DF. Influence of the Thr325Ile polymorphism on procarboxypeptidase U (thrombin-activable fibrinolysis inhibitor) activity-based assays. J Thromb Haemost 2007; 5:872-5. [PMID: 17408417 DOI: 10.1111/j.1538-7836.2007.02396.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Heylen E, Mansourati J, Saïag B, Thioub S, Guerrero F. Effect of training on endothelial function of cutaneous microcirculation in rats. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)84176-x] [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: 11/29/2022]
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Abstract
We undertook this study to determine whether long-term high intensity exercise would modify cutaneous endothelial-dependent vasodilation. We compared a group of 9 highly trained windsurfers (mean age: 24.5 +/- 1.6 years) to a control group of 8 sedentary individuals (22.9 +/- 0.4 years, NS). Laser Doppler was used to measure cutaneous blood flow in the resting state (baseline), during post-occlusive hyperaemia (endothelium-dependent vasodilation), and local heating to 42 degrees C. Lipid profile was similar in both groups. Resting heart rate was significantly lower in windsurfers. Baseline cutaneous vascular conductance (CVC) values were similar in both groups (0.059 +/- 0.016 and 0.051 +/- 0.009). During reactive hyperaemia, normalized peak CVC value was significantly higher in the windsurfers group (1775.4 +/- 286.9 and 826.4 +/- 121.7 % baseline CVC; p = 0.01). Normalized peak CVC value in response to local heating (42 degrees C) was not significantly different between both groups (2359.4 +/- 346.1 and 1467.7 +/- 282.6 % baseline CVC). Endothelium-dependent vasodilation in cutaneous microcirculation is significantly enhanced in the forearm skin of highly trained windsurfers when compared to sedentary controls.
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Affiliation(s)
- E Heylen
- E.A. 3879 Unité de Physiologie Comparée et Intégrative, U.F.R. Sport et Education Physique, 20 avenue Le Gorgeu C.S. 93837, 29238 Brest Cedex 3, France.
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