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Rivera-Tello CD, Guerrero JA, Huerta L, Flores-Ruiz FJ, Flores M, Quiñones-Galván JG. Influence of plasma kinetic energy during the pulsed laser deposition of borophene films on silicon (100). RSC Adv 2023; 13:29819-29829. [PMID: 37829715 PMCID: PMC10566584 DOI: 10.1039/d3ra04601j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 09/25/2023] [Indexed: 10/14/2023] Open
Abstract
Developing borophene films with good structural stability on non-metallic substrates to maximize their potential in photosensitivity, gas detection, photothermia, energy storage, and deformation detection, among others has been challenging in recent years. Herein, we succeeded in the pulsed laser deposition of multilayered borophene films on Si (100) with β12 or χ3 bonding by tuning the mean kinetic energy in the plasma during the deposition process. Raman and X-ray photoelectron spectroscopies confirm β12 and χ3 bonding in the films. Borophene films with β12 bonding were obtained by tuning a high mean kinetic energy in the plasma, while borophene with χ3 bonding required a relatively low mean kinetic energy. Atomic force microscopy (AFM) micrographs revealed a granular and directional growth of the multilayered borophene films following the linear atomic terraces from the (100) silicon substrate. AFM nanofriction was used to access the borophene surfaces and to reveal the pull-off force and friction coefficient of the films where the surface oxide showed a significant contribution. To summarize, we show that it is possible to deposit multilayered borophene thin films with different bondings by tuning the mean kinetic energy during pulsed laser deposition. The characterization of the plasma during borophene deposition accompanies our findings, providing support for the changes in kinetic energy.
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Affiliation(s)
- César D Rivera-Tello
- Departamento de Ingeniería Mecánica Eléctrica, CUCEI, Universidad de Guadalajara Blvd. Marcelino García Barragán 1421, Olímpica Guadalajara Jalisco C.P. 44430 Mexico
| | - J A Guerrero
- Departamento de Ingeniería Mecánica Eléctrica, CUCEI, Universidad de Guadalajara Blvd. Marcelino García Barragán 1421, Olímpica Guadalajara Jalisco C.P. 44430 Mexico
| | - L Huerta
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México A. P. 70-360 04510 Ciudad de México Mexico
| | - Francisco J Flores-Ruiz
- CONAHCYT-Instituto de Física, Benemérita Universidad Autónoma de Puebla Ciudad Universitaria, Edif. IF-1 Puebla 72570 México
| | - M Flores
- Departamento de Ingeniería de Proyectos, Universidad de Guadalajara 45150 Zapopan Jalisco Mexico
| | - J G Quiñones-Galván
- Departamento de Física, CUCEI, Universidad de Guadalajara Blvd. Marcelino García Barragán 1421, Olímpica Guadalajara Jalisco C.P. 44430 Mexico
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Rosas-Huerta J, Romero M, Arévalo-López E, Antonio J, Huerta L, Pérez-Mazariego J, Marquina M, Escamilla R. Crystal structure, Mössbauer and X-ray photoelectron spectroscopies, and magnetic properties of Sr2FeMo1-xNbxO6 compounds. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123621] [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: 10/14/2022]
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Casado ME, Huerta L, Marcos-Díaz A, Ortiz AI, Kraemer FB, Lasunción MA, Busto R, Martín-Hidalgo A. Hormone-sensitive lipase deficiency affects the expression of SR-BI, LDLr, and ABCA1 receptors/transporters involved in cellular cholesterol uptake and efflux and disturbs fertility in mouse testis. Biochim Biophys Acta Mol Cell Biol Lipids 2021; 1866:159043. [PMID: 34461308 DOI: 10.1016/j.bbalip.2021.159043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 08/18/2021] [Accepted: 08/19/2021] [Indexed: 12/14/2022]
Abstract
Hormone-sensitive lipase (HSL) hydrolyse acylglycerols, cholesteryl and retinyl esters. HSL is a key lipase in mice testis, as HSL deficiency results in male sterility. The present work study the effects of the deficiency and lack of HSL on the localization and expression of SR-BI, LDLr, and ABCA1 receptors/transporters involved in uptake and efflux of cholesterol in mice testis, to determine the impact of HSL gene dosage on testis morphology, lipid homeostasis and fertility. The results of this work show that the lack of HSL in mice alters testis morphology and spermatogenesis, decreasing sperm counts, sperm motility and increasing the amount of Leydig cells and lipid droplets. They also show that there are differences in the localization of HSL, SR-BI, LDLr and ABCA1 in HSL+/+, HSL+/- and HSL-/- mice. The deficiency or lack of HSL has effects on protein and mRNA expression of genes involved in lipid metabolisms in mouse testis. HSL-/- testis have augmented expression of SR-BI, LDLr, ABCA1 and LXRβ, a critical sterol sensor that regulate multiple genes involved in lipid metabolism; whereas LDLr expression decreased in HSL+/- mice. Plin2, Abca1 and Ldlr mRNA levels increased; and LXRα (Nr1h3) and LXRβ (Nr1h2) decreased in testis from HSL-/- compared with HSL+/+; with no differences in Scarb1. Together these data suggest that HSL deficiency or lack in mice testis induces lipid homeostasis alterations that affect the cellular localization and expression of key receptors/transporter involved in cellular cholesterol uptake and efflux (SR-BI, LDRr, ABCA1); alters normal cellular function and impact fertility.
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Affiliation(s)
- María Emilia Casado
- Servicio de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRyCIS), E-28034 Madrid, Spain; CIBER de Fisiopatología de la Obesidad y Nutrición (CIBERobn), ISCIII, Spain
| | - Lydia Huerta
- Servicio de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRyCIS), E-28034 Madrid, Spain; CIBER de Fisiopatología de la Obesidad y Nutrición (CIBERobn), ISCIII, Spain
| | - Ana Marcos-Díaz
- Servicio de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRyCIS), E-28034 Madrid, Spain; CIBER de Fisiopatología de la Obesidad y Nutrición (CIBERobn), ISCIII, Spain
| | - Ana Isabel Ortiz
- Unidad de Cirugía Experimental y Animalario, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRyCIS), E-28034 Madrid, Spain
| | - Fredric B Kraemer
- Division of Endocrinology, Stanford University, United States of America; VA Palo Alto Health Care System, Palo Alto, CA, United States of America
| | - Miguel Angel Lasunción
- Servicio de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRyCIS), E-28034 Madrid, Spain; CIBER de Fisiopatología de la Obesidad y Nutrición (CIBERobn), ISCIII, Spain
| | - Rebeca Busto
- Servicio de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRyCIS), E-28034 Madrid, Spain; CIBER de Fisiopatología de la Obesidad y Nutrición (CIBERobn), ISCIII, Spain
| | - Antonia Martín-Hidalgo
- Servicio de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRyCIS), E-28034 Madrid, Spain; CIBER de Fisiopatología de la Obesidad y Nutrición (CIBERobn), ISCIII, Spain.
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Espinoza Vázquez A, González-Olvera R, Moreno Cerros D, Negrón Silva G, Figueroa I, Rodríguez Gómez F, Castro M, Miralrio A, Huerta L. Inhibition of acid corrosion in API 5L X52 steel with 1,2,3-triazole derivatized from benzyl alcohol: Experimental and theoretical studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130731] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Clark JL, Perez-Brumer AG, Reisner SL, Salazar X, McLean S, Huerta L, Silva-Santisteban A, Moriarty KM, Mimiaga MJ, Sanchez J, Mayer KH, Lama JR. Social Network Organization, Structure, and Patterns of Influence Within a Community of Transgender Women in Lima, Peru: Implications for Biomedical HIV Prevention. AIDS Behav 2020; 24:233-245. [PMID: 30989553 PMCID: PMC6801001 DOI: 10.1007/s10461-019-02506-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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] [Indexed: 11/24/2022]
Abstract
Understanding social network structures can contribute to the introduction of new HIV prevention strategies with socially marginalized populations like transgender women (TW). We conducted 20 semi-structured interviews and four focus groups (n = 32) with TW from selected social networks in Lima, Peru between May and July, 2015. Participants described layers of social influence from diverse actors in their social networks. The majority identified a close relative as their primary social support, with whom they confided secrets but avoided issues of transgender identity, sexuality, and sex work. Participants described close circles of TW friends with whom they shared information about gender identity, body modification, and sexual partners, but avoided issues like HIV. Community leadership included political leaders (who advocated for transgender rights) as well as social leaders (who introduced TW to hormone therapy, body modification, and commercial sex). Detailed analysis of TW social networks can contribute to implementation and acceptability of new HIV prevention technologies.
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Affiliation(s)
- J L Clark
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, 10833 Leconte Avenue, CHS 37-121, Los Angeles, CA, 90095, USA.
| | - A G Perez-Brumer
- Department of Sociomedical Sciences, Columbia University Mailman School of Public Health, New York, NY, USA
| | - S L Reisner
- Department of Pediatrics, Harvard Medical School and Boston Children's Hospital, Boston, MA, USA
- Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA
- The Fenway Institute, Fenway Health, Boston, MA, USA
| | - X Salazar
- Instituto de Estudios de Sexualidad y Derechos Humanos, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - S McLean
- The Fenway Institute, Fenway Health, Boston, MA, USA
| | - L Huerta
- Asociacion Civil Impacta Salud y Educacion, Lima, Peru
| | - A Silva-Santisteban
- Instituto de Estudios de Sexualidad y Derechos Humanos, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - K M Moriarty
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, 10833 Leconte Avenue, CHS 37-121, Los Angeles, CA, 90095, USA
- Brown University Alpert School of Medicine, Providence, RI, USA
| | - M J Mimiaga
- Center for Health Equity Research, Brown University, Providence, RI, USA
- Departments of Behavioral and Social Sciences and Epidemiology, Brown University School of Public Health, Providence, RI, USA
- Department of Psychiatry and Human Behavior, Brown University Alpert School of Medicine, Providence, RI, USA
| | - J Sanchez
- Asociacion Civil Impacta Salud y Educacion, Lima, Peru
- CITBM, Universidad Nacional Mayor San Marcos, Lima, Peru
- Department of Global Health, University of Washington School of Medicine, Seattle, WA, USA
| | - K H Mayer
- The Fenway Institute, Fenway Health, Boston, MA, USA
| | - J R Lama
- Asociacion Civil Impacta Salud y Educacion, Lima, Peru
- Department of Global Health, University of Washington School of Medicine, Seattle, WA, USA
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Calderón B, Huerta L, Casado ME, González-Casbas JM, Botella-Carretero JI, Martín-Hidalgo A. Morbid obesity-related changes in the expression of lipid receptors, transporters, and HSL in human sperm. J Assist Reprod Genet 2019; 36:777-786. [PMID: 30659447 PMCID: PMC6505031 DOI: 10.1007/s10815-019-01406-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 11/08/2018] [Accepted: 01/09/2019] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVE To study the location and expression of receptors (SR-BI/CLA-1, SR-BII, and LDLr) and transporter (ABCA1) involved in uptake and efflux of cholesterol in human spermatozoa and assess whether obesity alters its location/expression and whether this could be related to infertility. DESIGN Observational study. SETTING None PATIENT(S): Ten controls and 20 obese patients. INTERVENTION(S) Anthropometric parameters. Serum and semen samples were collected. MAIN OUTCOME MEASURE(S) Spermatozoon concentration, immunolocalization, and protein expression in semen. RESULTS Spermatozoon concentration and motility was decreased in morbidly obese patients. SR-BI/CLA-1, SR-BII, LDLr, and ABCA1 are located in the spermatozoon cell membrane and the localization does not change between obese patients and controls. Control spermatozoa showed high SR-BI expression, and less expression for the rest of the receptors analyzed, indicating that SR-BI/CLA-1 is relevant in human spermatozoon cholesterol uptake/efflux. On the contrary, spermatozoa of obese patients showed less SR-BI/CLA-1 expression than controls, and more intense positive staining for SR-BII, LDLr, and ABCA1. Finally, human sperm expresses the 130- and 82-kDa hormone-sensitive lipase (HSL) isoforms. The 130-kDa isoform is expressed in the control sperm, and the expression disappears in the obese patients. CONCLUSION(S) The presence of lipid receptors/transporters and HSL in human spermatozoa suggests their role in the process of maturation/capacitation. The changes in the expression of lipid receptors/transporters and the lack of the 130-kDa HSL isoform in obese patients prevent the hydrolysis of cholesterol esters internalized by these receptors, and favor their accumulation in the cytoplasm of the spermatozoa that could contribute to lipotoxicity and infertility.
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Affiliation(s)
- Berniza Calderón
- Instituto Tecnológico Santo Domingo (INTEC), Santo Domingo, República Dominicana
- Departamento de Endocrinología y Metabolismo, Madrid, Spain
| | - Lydia Huerta
- Servicio de Bioquímica-Investigación, Madrid, Spain
| | - María Emilia Casado
- Servicio de Bioquímica-Investigación, Madrid, Spain
- CIBER de la Fisiopatología de la Obesidad y Nutrición (CIBERobn), ISCIII, Madrid, Spain
| | - José Manuel González-Casbas
- Instituto Europeo de Fertilidad y Unidad de Reproducción Asistida, Instituto Ramón y Cajal de Investigación Sanitaria (IRyCIS), Hospital Universitario Ramón y Cajal, E-28034, Madrid, Spain
| | - José Ignacio Botella-Carretero
- Departamento de Endocrinología y Metabolismo, Madrid, Spain
- CIBER de la Fisiopatología de la Obesidad y Nutrición (CIBERobn), ISCIII, Madrid, Spain
| | - Antonia Martín-Hidalgo
- Servicio de Bioquímica-Investigación, Madrid, Spain.
- CIBER de la Fisiopatología de la Obesidad y Nutrición (CIBERobn), ISCIII, Madrid, Spain.
- Department of Biochemistry-Research, Hospital Universitario Ramón y Cajal, Ctra.ColmenarViejo, Km 9.100, E-28034, Madrid, Spain.
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Calderón B, Huerta L, Galindo J, González Casbas JM, Escobar-Morreale HF, Martín-Hidalgo A, Botella-Carretero JI. Lack of Improvement of Sperm Characteristics in Obese Males After Obesity Surgery Despite the Beneficial Changes Observed in Reproductive Hormones. Obes Surg 2019; 29:2045-2050. [DOI: 10.1007/s11695-019-03798-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Casado ME, Pastor O, García-Seisdedos D, Huerta L, Kraemer FB, Lasunción MA, Martín-Hidalgo A, Busto R. Hormone-sensitive lipase deficiency disturbs lipid composition of plasma membrane microdomains from mouse testis. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1861:1142-1150. [DOI: 10.1016/j.bbalip.2016.06.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 06/01/2016] [Accepted: 06/24/2016] [Indexed: 11/17/2022]
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Lobo MVT, Arenas MI, Huerta L, Sacristán S, Pérez-Crespo M, Gutiérrez-Adán A, Díaz-Gil JJ, Lasunción MA, Martín-Hidalgo A. Liver growth factor induces testicular regeneration in EDS-treated rats and increases protein levels of class B scavenger receptors. Am J Physiol Endocrinol Metab 2015; 308:E111-21. [PMID: 25389365 DOI: 10.1152/ajpendo.00329.2014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of the present work was to determine the effects of liver growth factor (LGF) on the regeneration process of rat testes after chemical castration induced by ethane dimethanesulfonate (EDS) by analyzing some of the most relevant proteins involved in cholesterol metabolism, such as hormone sensitive lipase (HSL), 3β-hydroxysteroid dehydrogenase (3β-HSD), scavenger receptor SR-BI, and other components of the SR family that could contribute to the recovery of steroidogenesis and spermatogenesis in the testis. Sixty male rats were randomized to nontreated (controls) and LGF-treated, EDS-treated, and EDS + LGF-treated groups. Testes were obtained on days 10 (T1), 21 (T2), and 35 (T3) after EDS treatment, embedded in paraffin, and analyzed by immunohistochemistry and Western blot. LGF improved the recovery of the seminiferous epithelia, the appearance of the mature pattern of Leydig cell interstitial distribution, and the expression of mature SR-BI. Moreover, LGF treatment resulted in partial recovery of HSL expression in Leydig cells and spermatogonia. No changes in serum testosterone were observed in control or LGF-treated rats, but in EDS-castrated animals LGF treatment induced a progressive increase in serum testosterone levels and 3β-HSD expression. Based on the pivotal role of SR-BI in the uptake of cholesteryl esters from HDL, it is suggested that the observed effects of LGF would facilitate the provision of cholesterol for sperm cell growth and Leydig cell recovery.
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Affiliation(s)
- M V T Lobo
- Departamento de Biomedicina y Biotecnología, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - M I Arenas
- Departamento de Biomedicina y Biotecnología, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - L Huerta
- Servicio de Bioquímica-Departamento Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, CIBER de Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - S Sacristán
- Servicio de Bioquímica-Departamento Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, CIBER de Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - M Pérez-Crespo
- Departamento de Reproducción Animal y Conservación de Recursos Zoogenéticos, INIA, Madrid, Spain; and
| | - A Gutiérrez-Adán
- Departamento de Reproducción Animal y Conservación de Recursos Zoogenéticos, INIA, Madrid, Spain; and
| | - J J Díaz-Gil
- Servicio de Bioquímica Experimental, Hospital Universitario Puerta de Hierro Majadahonda, Madrid, Spain
| | - M A Lasunción
- Servicio de Bioquímica-Departamento Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, CIBER de Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - A Martín-Hidalgo
- Servicio de Bioquímica-Departamento Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, CIBER de Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain;
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López-Vinasco AM, Favier I, Pradel C, Huerta L, Guerrero-Ríos I, Teuma E, Gómez M, Martin E. Unexpected bond activations promoted by palladium nanoparticles. Dalton Trans 2014; 43:9038-44. [PMID: 24754040 DOI: 10.1039/c3dt53649a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Thioether-phosphines, 1 and 2, were applied for the stabilisation of palladium nanoparticles (PdNPs) synthesised by a bottom-up methodology, using [Pd2(dba)3] as an organometallic precursor. For the phenyl containing ligand 1, small (d(mean) = 1.6 nm), well-defined and dispersed nanoparticles were obtained; however, ligand 2 involving a long alkyl chain led to agglomerates. NMR and GC-MS analyses throughout the synthesis of the nanomaterials revealed partial cleavage of ligands by C-S and C-P bond activations, and XPS spectra of the isolated nanoparticles indicated the presence of both thioether-phosphines and their fragments on the metallic surface. Reactivity studies of molecular palladium systems as well as on extended palladium surfaces pointed out that cluster entities are responsible for C-heteroatom activations, triggering structure modifications of stabilisers during the synthesis of PdNPs.
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Affiliation(s)
- A M López-Vinasco
- Depto. de Química Inorgánica, Facultad de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, 04510 D.F., México.
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Dante RC, Martín-Ramos P, Sánchez-Arévalo F, Huerta L, Bizarro M, Navas-Gracia LM, Martín-Gil J. Synthesis of crumpled nanosheets of polymeric carbon nitride from melamine cyanurate. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2013.02.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Botella-Carretero JI, Balsa JA, Gómez-Martin JM, Peromingo R, Huerta L, Carrasco M, Arrieta F, Zamarron I, Martin-Hidalgo A, Vazquez C. Circulating free testosterone in obese men after bariatric surgery increases in parallel with insulin sensitivity. J Endocrinol Invest 2013; 36:227-32. [PMID: 22732238 DOI: 10.3275/8469] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND AND AIM Male hypogonadism has been linked to obesity and diabetes. We aimed to study the association of changes in insulin sensitivity and testosterone levels in severe obese patients submitted to bariatric surgery. SUBJECTS AND METHODS Prospective intervention study with twenty consecutive patients who underwent bariatric surgery studied before and after significant weight loss. Serum testosterone, SHBG, fasting glucose, and insulin were measured among others. Free testosterone was calculated with the Vermeulen formula and insulin sensitivity with the homeostatic model assessment (HOMA). RESULTS At baseline, thirteen patients had low total testosterone levels, whereas eight of these patients also had free testosterone levels below the reference range obtained from the control group. After bariatric surgery total testosterone, SHBG, and free testosterone significantly increased and achieved normal values in all evaluated patients. Insulin sensitivity improved in all of them. Multivariate linear regression showed that changes in fasting glucose (β=-1.868, p=0.001), insulin (β=-3.782, p=0.001), weight (β=-0.622, p=0.002), and SHBG (β=-0.635, p=0.022) were associated with changes in free testosterone (adjusted R2=0.936, F=26.613, p=0.001). When insulin resistance calculated by HOMA was in the model instead of insulin and glucose, it also was associated (β=-3.488, p=0.008) with free testosterone (adjusted R2=0.821, F=11.111, p=0.005). CONCLUSIONS Circulating tes tos terone in obese men increases after bariatric surgery in parallel with an improvement in insulin sensitivity.
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Affiliation(s)
- J I Botella-Carretero
- Unit of Clinical Nutrition and Obesity, Department of Endocrinology and Nutrition, Hospital Universitario Ramón y Cajal. IRYCIS, Madrid, Spain.
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Casado ME, Huerta L, Ortiz AI, Pérez-Crespo M, Gutiérrez-Adán A, Kraemer FB, Lasunción MÁ, Busto R, Martín-Hidalgo A. HSL-knockout mouse testis exhibits class B scavenger receptor upregulation and disrupted lipid raft microdomains. J Lipid Res 2012; 53:2586-97. [PMID: 22988039 DOI: 10.1194/jlr.m028076] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
There is a tight relationship between fertility and changes in cholesterol metabolism during spermatogenesis. In the testis, class B scavenger receptors (SR-B) SR-BI, SR-BII, and LIMP II mediate the selective uptake of cholesterol esters from HDL, which are hydrolyzed to unesterified cholesterol by hormone-sensitive lipase (HSL). HSL is critical because HSL knockout (KO) male mice are sterile. The aim of the present work was to determine the effects of the lack of HSL in testis on the expression of SR-B, lipid raft composition, and related cell signaling pathways. HSL-KO mouse testis presented altered spermatogenesis associated with decreased sperm counts, sperm motility, and infertility. In wild-type (WT) testis, HSL is expressed in elongated spermatids; SR-BI, in Leydig cells and spermatids; SR-BII, in spermatocytes and spermatids but not in Leydig cells; and LIMP II, in Sertoli and Leydig cells. HSL knockout male mice have increased expression of class B scavenger receptors, disrupted caveolin-1 localization in lipid raft plasma membrane microdomains, and activated phospho-ERK, phospho-AKT, and phospho-SRC in the testis, suggesting that class B scavenger receptors are involved in cholesterol ester uptake for steroidogenesis and spermatogenesis in the testis.
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Affiliation(s)
- María Emilia Casado
- Servicio de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, Madrid, Spain
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Palacios-Rodriguez Y, Gazarian T, Huerta L, Gazarian K. Short constrained peptides derived from phage display libraries as epitope models: the case of mAb 2F5. Retrovirology 2012. [PMCID: PMC3442092 DOI: 10.1186/1742-4690-9-s2-p89] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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15
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Carabalí G, Chavira E, Castro I, Bucio E, Huerta L, Jiménez-Mier J. Novel sol–gel methodology to produce LaCoO3 by acrylamide polymerization assisted by γ-irradiation. Radiat Phys Chem Oxf Engl 1993 2012. [DOI: 10.1016/j.radphyschem.2012.01.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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16
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Simon C, Vara E, Garutti I, Gonzalez-Casaurran G, Azcarate L, Isea J, Huerta L, Gonzalez-Aragoneses F. Modulation of monocyte chemoattractant protein-1 expression by ischaemic preconditioning in a lung autotransplant model. Eur J Cardiothorac Surg 2011; 41:933-9. [DOI: 10.1093/ejcts/ezr049] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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17
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Lobo MVT, Huerta L, Arenas MI, Busto R, Lasunción MA, Martín-Hidalgo A. Hormone-sensitive lipase expression and IHC localization in the rat ovary, oviduct, and uterus. J Histochem Cytochem 2008; 57:51-60. [PMID: 18824635 DOI: 10.1369/jhc.2008.951996] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Hormone-sensitive lipase (HSL) is a key regulator of cholesterol esters metabolism. The aim of this study was to determine HSL localization in rat female reproductive organs during the ovarian cycle by IHC methods. HSL was located in the ovarian epithelium. The granulosa cells and oocytes of primordial follicles were immunonegative. In mature follicles, HSL was found in oocytes and theca and granulosa cells. However, HSL expression in theca cells and oocytes decreased during follicular atresia. Luteal cells showed HSL staining in cytoplasm during proestrus and estrus, in the nucleus during metestrus, and in cytoplasm and the nucleus during diestrus. In the tubaric ampulla, HSL was located in the epithelial cells nuclei and in the cilia during proestrus and estrus but mainly in the nucleus during metestrus and diestrus. In the isthmus, cells showed HSL immunolabeling in the nucleus and cilia during proestrus, but only in the cilia during estrus, metestrus, and diestrus. In the uterus, HSL was found in the epithelial cells nuclei. HSL-immunoreactive bands at 84, 67, 54, and 43 kDa were found in rat female reproductive organs. HSL labeling in the nucleus of epithelial and germ cells suggests an as yet unknown function for this protein, probably related to oogenesis and cell proliferation.
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Affiliation(s)
- María V T Lobo
- Department of Cell Biology and Genetics, Alcalá de Henares University, Madrid, Spain
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18
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Gómez-Icazbalceta G, Huerta L, Soto-Ramirez LE, Larralde C. Extracellular HIV-1 Nef protein modulates lytic activity and proliferation of human CD8+ T lymphocytes. Cell Immunol 2008; 250:85-90. [PMID: 18358457 DOI: 10.1016/j.cellimm.2008.01.008] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2007] [Revised: 01/01/2008] [Accepted: 01/22/2008] [Indexed: 10/22/2022]
Abstract
The effect of extracellular HIV Nef (exNef) protein on the induction of lytic activity and proliferation of CD8+T lymphocytes from 18 donors was studied. At 10 ng/ml, exNef-induced a 2- to 8-fold enhancement of basal lytic activity in cells from all donors in an allogeneic induction assay, whereas it was ineffective at 100ng/ml. The extent of enhancement was inversely correlated with the basal level of lytic activity without exNef. Only in combination with PHA did both exNef concentrations stimulate proliferation, and in a manner inversely related to the effect of PHA alone. Thus, concentrations of exNef commonly found in sera of HIV-infected patients were found to modulate the induction of lytic activity and proliferation of CD8+ T lymphocytes in vitro, to an extent strongly dependent on the quite variable responsiveness of each donor. These findings point to Nef as a potential agent for modulating CD8+ T cell function in pathogenesis and therapy.
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Affiliation(s)
- G Gómez-Icazbalceta
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Distrito Federal, AP 70228, C.P. 04510, Mexico City, México.
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19
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López-Balderas N, Huerta L, Villarreal C, Rivera-Toledo E, Sandoval G, Larralde C, Lamoyi E. In vitro cell fusion between CD4+ and HIV-1 Env+ T cells generates a diversity of syncytia varying in total number, size and cellular content. Virus Res 2007; 123:138-46. [PMID: 17014923 DOI: 10.1016/j.virusres.2006.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [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: 05/16/2006] [Revised: 08/22/2006] [Accepted: 08/23/2006] [Indexed: 11/29/2022]
Abstract
Syncytia formation in HIV infections is driven by the virus fusion-active molecules (Env) interacting with membrane components of hosts cells. HIV-syncytia are usually interpreted as pathogenic entities and although they may potentially vary in size, numbers and types of constituent cells, little is known about the extent and significance of their diversity. Here, we describe numerically the cell population dynamics and the diversity of syncytia produced in the in vitro cell-fusion between two Jurkat T cell lines, one CD4(+) and the other Env(+). Cell-fusion partners were differentially stained with the lipophilic DiI and DiO, or with the cytoplasmic CMFDA and CMTMR tracers and syncytia showing double fluorescence were counted in a flow cytometer. The total number of syncytia formed, their size, cellular complexity and ratio of CD4(+)/Env(+) cells recruited, varied significantly in relation with time of reaction and initial proportions of fusion partners. The considerable structural diversity of syncytia formed, in so limited an in vitro cell fusion reaction, suggests that a greater heterogeneity may be formed in the natural course of disease. Identification of the main determinants of syncytia diversity allows for a detailed study of the relation between the syncytia structure and function.
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Affiliation(s)
- N López-Balderas
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Apartado Postal 70228, Ciudad Universitaria, Distrito Federal, C.P. 04510, Mexico
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20
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Huerta L, Gómez-Icazbalceta G, Soto-Ramírez L, Viveros-Rogel M, Rodríguez R, Fuentes L, Lamoyi E, Larralde C. Human immunodeficiency virus 1 (HIV-1) envelope-dependent cell-cell fusion modulation by HIV-positive sera is related to disease progression. J Gen Virol 2005; 86:1961-1966. [PMID: 15958674 DOI: 10.1099/vir.0.80635-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [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: 11/18/2022] Open
Abstract
Fusion of CD4+ cells by HIV-1 envelope proteins (Env) is a mechanism of virus spread and cell damage. Production of antibodies able to influence cell-cell fusion in vivo may affect the course of the infection. The effect of sera from 49 HIV-1-positive patients was tested on an in vitro fusion assay using Env-expressing and normal Jurkat T cells labelled with DiI and DiO dyes, and flow cytometry for quantification of cell-cell fusion. Sera varied in their activity on fusion: 69.4 % inhibited, 24.5 % had no effect and 6.1 % enhanced cell fusion. Fusion activity correlated positively with the CD4+ T-cell count and inversely with the viral load. Removal of IgG or IgM from sera reduced or eliminated inhibition and enhancing activities, respectively. Antibodies with inhibitory activity predominate in early and intermediate stages of infection, whereas loss of inhibition or enhancement of fusion correlates with progression to AIDS.
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Affiliation(s)
- L Huerta
- Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Apartado Postal 70228, Distrito Federal, CP 04510, México
| | - G Gómez-Icazbalceta
- Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Apartado Postal 70228, Distrito Federal, CP 04510, México
| | - L Soto-Ramírez
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Secretaría de Salud, Distrito Federal, México
| | - M Viveros-Rogel
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Secretaría de Salud, Distrito Federal, México
| | - R Rodríguez
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Secretaría de Salud, Distrito Federal, México
| | - L Fuentes
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Secretaría de Salud, Distrito Federal, México
| | - E Lamoyi
- Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Apartado Postal 70228, Distrito Federal, CP 04510, México
| | - C Larralde
- Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Apartado Postal 70228, Distrito Federal, CP 04510, México
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21
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Martín-Hidalgo A, Huerta L, Alvarez N, Alegría G, Del Val Toledo M, Herrera E. Expression, activity, and localization of hormone-sensitive lipase in rat mammary gland during pregnancy and lactation. J Lipid Res 2005; 46:658-68. [PMID: 15654127 DOI: 10.1194/jlr.m400370-jlr200] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We examined the presence of hormone-sensitive lipase (HSL) in mammary glands of virgin, pregnant (12, 20, and 21 days), and lactating (1 and 4 days postpartum) rats. Immunohistochemistry with antibody against rat HSL revealed positive HSL in the cytoplasm of both alveolar epithelial cells and adipocytes. In virgin rats, immunoreactive HSL was observed in mammary adipocytes, whereas diffuse staining was found in the epithelial cells. Positive staining for HSL was seen in the two types of cells in pregnant and lactating rats. However, as pregnancy advanced, the staining intensity of immunoreactive HSL increased in the epithelial cells parallel to their proliferation, attaining the maximum during lactation. An immunoreactive protein of 84 kDa and a HSL mRNA of 3.3. kb were found in the rat mammary gland as in white adipose tissue. Both HSL protein and activity were lower in mammary glands from 20 and 21 day pregnant rats than from those of virgin rats, although they returned to virgin values on days 1 and 4 of lactation. Mammary gland HSL activity correlated negatively to plasma insulin levels. Immunoreactive HSL and HSL activity were found in lactating rats' milk. The observed changes indicate an active role of HSL in mammary gland lipid metabolism.
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22
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Forment J, Gadea J, Huerta L, Abizanda L, Agusti J, Alamar S, Alos E, Andres F, Arribas R, Beltran JP, Berbel A, Blazquez MA, Brumos J, Canas LA, Cercos M, Colmenero-Flores JM, Conesa A, Estables B, Gandia M, Garcia-Martinez JL, Gimeno J, Gisbert A, Gomez G, Gonzalez-Candelas L, Granell A, Guerri J, Lafuente MT, Madueno F, Marcos JF, Marques MC, Martinez F, Martinez-Godoy MA, Miralles S, Moreno P, Navarro L, Pallas V, Perez-Amador MA, Perez-Valle J, Pons C, Rodrigo I, Rodriguez PL, Royo C, Serrano R, Soler G, Tadeo F, Talon M, Terol J, Trenor M, Vaello L, Vicente O, Vidal C, Zacarias L, Conejero V. Development of a citrus genome-wide EST collection and cDNA microarray as resources for genomic studies. Plant Mol Biol 2005; 57:375-91. [PMID: 15830128 DOI: 10.1007/s11103-004-7926-1] [Citation(s) in RCA: 58] [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] [Subscribe] [Scholar Register] [Received: 09/06/2004] [Accepted: 12/20/2004] [Indexed: 05/20/2023]
Abstract
A functional genomics project has been initiated to approach the molecular characterization of the main biological and agronomical traits of citrus. As a key part of this project, a citrus EST collection has been generated from 25 cDNA libraries covering different tissues, developmental stages and stress conditions. The collection includes a total of 22,635 high-quality ESTs, grouped in 11,836 putative unigenes, which represent at least one third of the estimated number of genes in the citrus genome. Functional annotation of unigenes which have Arabidopsis orthologues (68% of all unigenes) revealed gene representation in every major functional category, suggesting that a genome-wide EST collection was obtained. A Citrus clementina Hort. ex Tan. cv. Clemenules genomic library, that will contribute to further characterization of relevant genes, has also been constructed. To initiate the analysis of citrus transcriptome, we have developed a cDNA microarray containing 12,672 probes corresponding to 6875 putative unigenes of the collection. Technical characterization of the microarray showed high intra- and inter-array reproducibility, as well as a good range of sensitivity. We have also validated gene expression data achieved with this microarray through an independent technique such as RNA gel blot analysis.
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Affiliation(s)
- J Forment
- Instituto de Biologíia Molecular y Celular de Plantas (IBMCP), Universidad Politécnica de Valencia, Laboratorio de Genómica, Spain
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23
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Luna M, Huerta L, Berumen L, Martínez-Coria H, Harvey S, Arámburo C. Growth hormone in the male reproductive tract of the chicken: heterogeneity and changes during ontogeny and maturation. Gen Comp Endocrinol 2004; 137:37-49. [PMID: 15094334 DOI: 10.1016/j.ygcen.2004.02.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [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] [Received: 11/12/2003] [Revised: 02/10/2004] [Accepted: 02/11/2004] [Indexed: 11/25/2022]
Abstract
Growth hormone (GH) gene expression is not confined to pituitary somatotrophs and occurs in many extrapituitary tissues. In this study, we describe the presence of GH moieties in the chicken testis. GH-immunoreactivity (GH-IR), determined by ELISA, was found in the testis of immature and mature chickens, but at concentrations <1% of those in the pituitary gland. The immunoassayable GH concentration in the testis was unchanged between 4 and 66 weeks of age, and approximately 10-fold higher than that at 1-week of age and 25-fold higher than that in 1-day-old chicks and perinatal (embryonic day 18) embryos. This immunoreactivity was associated with several proteins of different molecular size, as in the pituitary gland, when analyzed by SDS-PAGE under reducing conditions. However, while most of the GH-IR in the pituitary ( approximately 40 and 15%, respectively) is associated with monomer (26 kDa) or dimer (52 kDa) GH moieties GH-IR in the testis is primarily (30-50%) associated with a 17 kDa moiety. GH bands between 32 and 45 kDa are also relatively more abundant in the testis than in the pituitary. During ontogeny the relative abundance of a 14 kDa GH and 40 kDa GH moieties in the testis significantly declined, whereas the relative abundance of the 17 and 45 kDa moieties increased with advancing age. In adult birds, GH-IR was widespread and intense in the seminiferous tubules. Although the GH-IR was not present in the basal compartment of Sertoli cells, nor in spermatogonia and primary spermatocytes, it was abundantly present in secondary spermatocytes and spermatids in the luminal compartments of the tubules as well as in some surrounding myocytes and interstitial cells. In summary, immunoreactive GH moieties are present in the chicken testis but at concentrations far less than in the pituitary. Age-related changes in the relative abundance of testicular GH variants may be related to local (autocrine/paracrine) actions of testicular GH. The localization of GH in spermatocytes and spermatids suggests hitherto unsuspected roles in gamete development.
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Affiliation(s)
- M Luna
- Department of Cellular and Molecular Neurobiology, Institute of Neurobiology, Campus UNAM-UAQ Juriquilla, Universidad Nacional Autónoma de México, A.P. 1-1141, Querétaro, Qro. 76001, México
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24
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Lobo MV, Huerta L, Ruiz-Velasco N, Teixeiro E, de la Cueva P, Celdrán A, Martín-Hidalgo A, Vega MA, Bragado R. Localization of the lipid receptors CD36 and CLA-1/SR-BI in the human gastrointestinal tract: towards the identification of receptors mediating the intestinal absorption of dietary lipids. J Histochem Cytochem 2001; 49:1253-60. [PMID: 11561009 DOI: 10.1177/002215540104901007] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.8] [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: 01/23/2023] Open
Abstract
The scavenger receptors CLA-1/SR-BI and CD36 interact with native and modified lipoproteins and with some anionic phospholipids. In addition, CD36 binds/transports long-chain free fatty acids. Recent biochemical evidences indicates that the rabbit CLA-1/SR-BI receptor can be detected in enterocytes, and previous studies showed the presence of mRNA for both CLA-1/SR-BI and CD36 in some segments of the intestinal tract. These findings prompted us to study their respective localization and distribution from the human stomach to the colorectal segments, using immunohistochemical methods. Their expression in the colorectal carcinoma-derived cell line Caco-2 was analyzed by Northern blotting. In the human intestinal tract, CLA-1/SR-BI was found in the brush-border membrane of enterocytes from the duodenum to the rectum. However, CD36 was found only in the duodenal and jejunal epithelium, whereas enterocytes from other intestinal segments were not stained. In the duodenum and jejunum, CD36 co-localized with CLA-1/SR-BI in the apical membrane of enterocytes. The gastric epithelium was immunonegative for both glycoproteins. We also found that CLA-1/SR-BI mRNA was expressed in Caco-2 cells and that its expression levels increased concomitantly with their differentiation. In contrast, the CD36 transcript was not found in this colon cell line, in agreement with the absence of this protein in colon epithelium. The specific localization of CLA-1/SR-BI and CD36 along the human gastrointestinal tract and their ability to interact with a large variety of lipids strongly support a physiological role for them in absorption of dietary lipids.
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Affiliation(s)
- M V Lobo
- Departamento de Investigación, Hospital Ramón y Cajal, Madrid, Spain
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Herrera E, Lasunción MA, Huerta L, Martín-Hidalgo A. Plasma leptin levels in rat mother and offspring during pregnancy and lactation. Biol Neonate 2000; 78:315-20. [PMID: 11093013 DOI: 10.1159/000014286] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The profiles of plasma leptin levels in pregnant and lactating rats and their offspring were determined. The plasma leptin levels increased on days 12 and 20 of gestation and declined on day 21 of gestation, remaining at this level during lactation. These changes were similar for lumbar adipose tissue weight, and a significant correlation was found when both variables were plotted with individual values. During the last 2 days of intrauterine life, the plasma leptin levels in the fetuses were in the same range as in their mothers, declining from day 20 to day 21. On the 1st day of life, the leptin levels increased to decline in suckling newborns after 4 days, remaining stable until day 20 of life. The enhancement in maternal white adipose tissue mass that takes place during pregnancy and its decline around parturition and lactation are proposed to contribute actively to the changes in the plasma leptin profile detected at these stages. Besides the contribution of placental leptin for the fetus and milk leptin for the suckling newborn, it is proposed that brown adipose tissue, which is the first form of adipose tissue that appears during development in the rat, is responsible for most of the changes in plasma leptin levels seen around birth, whereas its later decline could be mediated by the hormonal changes occurring after birth.
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Affiliation(s)
- E Herrera
- Universidad San Pablo-CEU, Madrid, Spain
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27
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Huerta L, Terrazas LI, Sciutto E, Larralde C. Immunological Mediation of Gonadal Effects on Experimental Murine Cysticercosis Caused by Taenia crassiceps Metacestodes. J Parasitol 1992. [DOI: 10.2307/3283646] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Huerta L, Terrazas LI, Sciutto E, Larralde C. Immunological mediation of gonadal effects on experimental murine cysticercosis caused by Taenia crassiceps metacestodes. J Parasitol 1992; 78:471-6. [PMID: 1597791] [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: 12/27/2022] Open
Abstract
Female BALB/c mice are naturally more susceptible than males to intraperitoneal experimental infection with Taenia crassiceps metacestodes. Gonadectomy tends to equalize susceptibility between sexes by reducing in half the mean individual intensity of females and by tripling that of males. The effect of gonadectomy is seen only in mice with intact immune systems but not in irradiated mice. Purified sex hormones (17-beta estradiol, testosterone, and progesterone) do not affect cysticercus reproduction or growth in vitro. Thus, gonadal effect on mouse susceptibility to cysticercosis appears to be mediated via the immune system, and it is probably not the consequence of the major sex steroids acting directly upon the parasites. Because sublethal irradiation increases the intensity in gonadectomized females and intact males, whereas that of gonadectomized males and intact females remains unchanged, irradiation results are consistent with the hypothesis that immunological events that participate in controlling the growth of cysticerci are inhibited by ovaries and stimulated by testes.
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Affiliation(s)
- L Huerta
- Department of Immunology, Universidad Nacional Autónoma de México, D.F
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Huerta L. Getting it together: procedure manuals. Respir Ther 1977; 7:55, 57-8, 60. [PMID: 10236559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Gutiérrez Martínez C, Huerta L, Ibarra A, Muñoz G, Obieta D. [Some considerations on cancer of the thyroid and thyroiditis]. Rev Med Hosp Gen (Mex) 1965; 28:191-8. [PMID: 5829932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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