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Zhu Y, Engmann M, Medina D, Han X, Das P, Bartke A, Ellsworth BS, Yuan R. Metformin treatment of juvenile mice alters aging-related developmental and metabolic phenotypes in sex-dependent and sex-independent manners. GeroScience 2024; 46:3197-3218. [PMID: 38227136 PMCID: PMC11009201 DOI: 10.1007/s11357-024-01067-6] [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: 05/30/2023] [Accepted: 12/30/2023] [Indexed: 01/17/2024] Open
Abstract
Metformin has attracted increasing interest for its potential benefits in extending healthspan and longevity. This study examined the effects of early-life metformin treatment on the development and metabolism of C57BL/6 J (B6) mice, with metformin administered to juvenile mice from 15 to 56 days of age. Metformin treatment led to decreased body weight in both sexes (P < 0.05, t-test). At 9 weeks of age, mice were euthanized and organ weights were recorded. The relative weight of retroperitoneal fat was decreased in females, while relative weights of perigonadal and retroperitoneal fat were decreased, and relative liver weight was increased in males (P < 0.05, t-test). Glucose and insulin tolerance tests (GTT and ITT) were conducted at the age of 7 weeks. ANOVA revealed a significant impairment in insulin sensitivity by the treatment, and a significantly interactive effect on glucose tolerance between sex and treatment, underscoring a disparity in GTT between sexes in response to the treatment. Metformin treatment reduced circulating insulin levels in fasting and non-fasting conditions for male mice, with no significant alterations observed in female mice. qRT-PCR analysis of glucose metabolism-related genes (Akt2, Glut2, Glut4, Irs1, Nrip1, Pi3k, Pi3kca, Pkca) in the liver and skeletal muscle reveals metformin-induced sex- and organ-specific effects on gene expression. Comparison with previous studies in heterogeneous UM-HET3 mice receiving the same treatment suggests that genetic differences may contribute to variability in the effects of metformin treatment on development and metabolism. These findings indicate that early-life metformin treatment affects development and metabolism in both sex- and genetics-dependent manners.
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Affiliation(s)
- Yun Zhu
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA
| | - Morgan Engmann
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA
| | - David Medina
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA
| | - Xiuqi Han
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA
| | - Pratyusa Das
- Department of Physiology, Southern Illinois University SIU School of Medicine, 1135 Lincoln Drive, Life Science III, Room 2062, Carbondale, IL, 62901, USA
| | - Andrzej Bartke
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA
| | - Buffy S Ellsworth
- Department of Physiology, Southern Illinois University SIU School of Medicine, 1135 Lincoln Drive, Life Science III, Room 2062, Carbondale, IL, 62901, USA
| | - Rong Yuan
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA.
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Fang Y, Peck MR, Quinn K, Medina D, Roy S, McFadden SA, Bartke A, Hascup KN, Hascup ER. Senolytic Intervention Improves Cognition, Metabolism, and Adiposity in Female APP NL-F/NL-F Mice. bioRxiv 2023:2023.12.12.571277. [PMID: 38168356 PMCID: PMC10760014 DOI: 10.1101/2023.12.12.571277] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
INTRODUCTION Senescent cells accumulate throughout the body and brain contributing to unhealthy aging and Alzheimer's disease (AD). We hypothesized that senolytic intervention would alleviate cellular senescence thereby improving spatial memory in APPNL-F/NL-F mice. METHODS Male and female APPNL-F/NL-F mice were treated monthly with vehicle, 5 mg/kg Dasitinib (D) + 50 mg/kg Quercetin (Q), or 100 mg/kg Fisetin. Blood glucose levels, energy metabolism, spatial memory, and senescent cell markers were assayed. RESULTS D+Q treatment in female APPNL-F/NL-F mice increased oxygen consumption and energy expenditure resulting in decreased body mass. White adipose tissue content was decreased along with senescence markers, SASP, blood glucose, and plasma insulin and triglycerides. Hippocampal senescence markers and SASP were reduced along with soluble and insoluble Aβ42 and SA-β-gal activity leading to improved spatial memory. DISCUSSION Considering women have a greater risk of dementia, identifying senotherapeutics appropriate for sex and disease stage is necessary for personalized medicine.
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Affiliation(s)
- Yimin Fang
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
| | - Mackenzie R. Peck
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
| | - Kathleen Quinn
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
| | - David Medina
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
| | - Stephen Roy
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
| | - Samuel A. McFadden
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
| | - Andrzej Bartke
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
- Department of Medical Microbiology, Immunology and Cell Biology, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
| | - Kevin N. Hascup
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
- Department of Medical Microbiology, Immunology and Cell Biology, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
| | - Erin R. Hascup
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
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Fang Y, Medina D, Stockwell R, McFadden S, Quinn K, Peck MR, Bartke A, Hascup KN, Hascup ER. Sexual dimorphic metabolic and cognitive responses of C57BL/6 mice to Fisetin or Dasatinib and quercetin cocktail oral treatment. GeroScience 2023; 45:2835-2850. [PMID: 37296266 PMCID: PMC10643448 DOI: 10.1007/s11357-023-00843-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 05/23/2023] [Indexed: 06/12/2023] Open
Abstract
Senolytic treatment in aged mice clears senescent cell burden leading to functional improvements. However, less is known regarding the effects of these compounds when administered prior to significant senescent cell accumulation. From 4-13 months of age, C57BL/6 male and female mice received monthly oral dosing of either 100 mg/kg Fisetin or a 5 mg/kg Dasatinib (D) plus 50 mg/kg Quercetin (Q) cocktail. During treatment, several aspects of healthy aging were assayed including glucose metabolism using an insulin and glucose tolerance test, cognitive performance using Morris water maze and novel object recognition, and energy metabolism using indirect calorimetry. Afterwards, mice were euthanized for plasma, tissue specific markers of senescence-associated secretory phenotype (SASP), and white adipose tissue accumulation (WAT). Sexually dimorphic treatment effects were observed. Fisetin treated male mice had reduced SASP, enhanced glucose and energy metabolism, improved cognitive performance, and increased mRNA expression of adiponectin receptor 1 and glucose transporter 4. D + Q treatment had minimal effects in male C57BL/6 mice, but was detrimental to females causing increased SASP expression along with accumulation of WAT depots. Reduced energy metabolism and cognitive performance were also noted. Fisetin treatment had no effect in female C57BL/6 mice potentially due to a slower rate of biological aging. In summary, the senolytic treatment in young adulthood, has beneficial, negligible, or detrimental effects in C57BL/6 mice dependent upon sex and treatment. These observations should serve as a note of caution in this rapidly evolving and expanding field of investigation. Male and female C57BL/6 mice were treated with once monthly oral doses of either Dasatinib (D) + Quercetin (Q) or Fisetin from 4-13 months of age. Males treated with Fisetin had reduced SASP markers (blue spheres) as well as improved metabolism (red flame) and cognition. Females treated with D + Q had increased adiposity and SASP markers (red spheres) along with decreased metabolism (blue flame) and cognitive performance. No effects were observed in females treated with Fisetin or males treated with D + Q.
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Affiliation(s)
- Yimin Fang
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer's Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - David Medina
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Robert Stockwell
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Sam McFadden
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer's Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Kathleen Quinn
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer's Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Mackenzie R Peck
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer's Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Andrzej Bartke
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
- Department of Medical Microbiology, Immunology and Cell Biology, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Kevin N Hascup
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer's Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
- Department of Medical Microbiology, Immunology and Cell Biology, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Erin R Hascup
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer's Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA.
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA.
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Fang Y, Medina D, Stockwell R, McFadden S, Hascup ER, Hascup KN, Bartke A. Resistance to mild cold stress is greater in both wild-type and long-lived GHR-KO female mice. GeroScience 2023; 45:1081-1093. [PMID: 36527583 PMCID: PMC9886789 DOI: 10.1007/s11357-022-00706-0] [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: 09/08/2022] [Accepted: 11/30/2022] [Indexed: 12/23/2022] Open
Abstract
Adapting to stress, including cold environmental temperature (eT), is crucial for the survival of mammals, especially small rodents. Long-lived mutant mice have enhanced stress resistance against oxidative and non-oxidative challenges. However, much less is known about the response of those long-lived mice to cold stress. Growth hormone receptor knockout (GHR-KO) mice are long-lived with reduced growth hormone signaling. We wanted to test whether GHR-KO mice have enhanced resistance to cold stress. To examine the response of GHR-KO mice to cold eT, GHR-KO mice were housed at mild cold eT (16 °C) immediately following weaning. Longevity results showed that female GHR-KO and wild-type (WT) mice retained similar lifespan, while both male GHR-KO and WT mice had shortened lifespan compared to the mice housed at 23 °C eT. Female GHR-KO and WT mice housed at 16 °C had upregulated fibroblast growth factor 21 (FGF21), enhanced energy metabolism, reduced plasma triglycerides, and increased mRNA expression of some xenobiotic enzymes compared to females housed at 23 °C and male GHR-KO and WT mice housed under the same condition. In contrast, male GHR-KO and WT mice housed at 16 °C showed deleterious effects in parameters which might be associated with their shortened longevity compared to male GHR-KO and WT mice housed at 23 °C. Together, this study suggests that in response to mild cold stress, sex plays a pivotal role in the regulation of longevity, and female GHR-KO and WT mice are more resistant to this challenge than the males.
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Affiliation(s)
- Yimin Fang
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer's Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA.
| | - David Medina
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Robert Stockwell
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Samuel McFadden
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer's Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Erin R Hascup
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer's Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Kevin N Hascup
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer's Research and Treatment, Neuroscience Institute, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
- Department of Medical Microbiology, Immunology and Cell Biology, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Andrzej Bartke
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
- Department of Medical Microbiology, Immunology and Cell Biology, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
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Garcia A, Medina D, Palacio A, Vallejo A, Díaz LA, Franco JD, Taborda T, Rojas MJ. CLO23-040: Electrocardiographic Findings in Cancer Patients Receiving Chemotherapy From the Colombian Coffee Triangle Region. J Natl Compr Canc Netw 2023. [DOI: 10.6004/jnccn.2022.7147] [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: 04/03/2023]
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Luna H, Prieto E, Dimayacyac-Esleta B, Imasa M, Juat N, Hernandez K, Sayo T, Cristal-Luna G, Asur-Galang S, Bellengan M, Duga K, Buenaobra B, De los Santos M, Medina D, Samo J, Literal V, Sy-Naval S. 342P Prognostic implications of PD-L1 co-expression among Filipino EGFR MT mNSCLC. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.380] [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: 12/05/2022] Open
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7
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Zhu Y, Fang Y, Medina D, Bartke A, Yuan R. Metformin treatment of juvenile mice alters aging-related developmental and metabolic phenotypes. Mech Ageing Dev 2022; 201:111597. [PMID: 34780856 PMCID: PMC8755607 DOI: 10.1016/j.mad.2021.111597] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 11/01/2021] [Accepted: 11/04/2021] [Indexed: 01/03/2023]
Abstract
Accumulating evidence suggests that the influence on developmental traits might have long-term effects on aging and health later in life. Metformin is a widely used drug for treating type 2 diabetes and is also used for delaying sexual maturation in girls with precocious puberty. The current report focuses on investigating the effects of metformin on development and metabolic traits. Heterogeneous mice (UM-HET3) were treated with i.p. metformin between the ages of 15 and 56 days. Our results show that body weight and food consumption were increased in both sexes, and sexual maturation was delayed in females. Tail length and circulating insulin-like growth factor 1 (IGF1) levels were significantly increased in both sexes. No significant difference was found in insulin tolerance test, but glucose tolerance was significantly reduced in the males. Circulating adiponectin and insulin levels were altered by metformin treatment in a sex-specific manner. Analysis of quantitative insulin sensitivity check index (QUICKI) suggests that metformin treatment increased insulin sensitivity in female pups, but had opposite effect in male pups. This study revealed that early life metformin treatment alters development and metabolism of mice in both sex-specific and non-specific manners. These effects of metformin may have long-term impacts on aging-related traits.
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Affiliation(s)
- Yun Zhu
- Deparment of Medical Microbiology, Immunology, and Cell Biology, Southern Illinois School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA,Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA
| | - Yimin Fang
- Department of Neurology, Southern Illinois University School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA
| | - David Medina
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA
| | - Andrzej Bartke
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA
| | - Rong Yuan
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA
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Landeta-Salgado C, Cicatiello P, Stanzione I, Medina D, Berlanga Mora I, Gomez C, Lienqueo ME. The growth of marine fungi on seaweed polysaccharides produces cerato-platanin and hydrophobin self-assembling proteins. Microbiol Res 2021; 251:126835. [PMID: 34399103 DOI: 10.1016/j.micres.2021.126835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 02/02/2021] [Revised: 07/08/2021] [Accepted: 07/28/2021] [Indexed: 01/15/2023]
Abstract
The marine fungi Paradendryphiela salina and Talaromyces pinophilus degrade and assimilate complex substrates from plants and seaweed. Additionally, these fungi secrete surface-active proteins, identified as cerato-platanins and hydrophobins. These hydrophobic proteins have the ability to self-assemble forming amyloid-like aggregates and play an essential role in the growth and development of the filamentous fungi. It is the first time that one cerato-platanin (CP) is identified and isolated from P. salina (PsCP) and two Class I hydrophobins (HFBs) from T. pinophilus (TpHYD1 and TpHYD2). Furthermore, it is possible to extract cerato-platanins and hydrophobins using marine fungi that can feed on seaweed biomass, and through a submerged liquid fermentation process. The propensity to aggregate of these proteins has been analyzed using different techniques such as Thioflavin T fluorescence assay, Fourier-transform Infrared Spectroscopy, and Atomic Force Microscopy. Here, we show that the formation of aggregates of PsCP and TpHYD, was influenced by the carbon source from seaweed. This study highlighted the potential of these self-assembling proteins generated from a fermentation process with marine fungi and with promising properties such as conformational plasticity with extensive applications in biotechnology, pharmacy, nanotechnology, and biomedicine.
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Affiliation(s)
- Catalina Landeta-Salgado
- Department of Chemical Engineering, Biotechnology, and Materials, Faculty of Physical and Mathematical Sciences, University of Chile, Santiago, Beauchef 851, 8370456, Chile; Center for Biotechnology and Bioengineering (CeBiB), Santiago, Beauchef 851, 8370456, Chile
| | - Paola Cicatiello
- Department of Chemical Sciences, University of Naples Federico II, via Cintia 4, I-80126 Naples, Italy
| | - Ilaria Stanzione
- Department of Chemical Sciences, University of Naples Federico II, via Cintia 4, I-80126 Naples, Italy
| | - David Medina
- Department of Chemical Engineering, Biotechnology, and Materials, Faculty of Physical and Mathematical Sciences, University of Chile, Santiago, Beauchef 851, 8370456, Chile; Center for Biotechnology and Bioengineering (CeBiB), Santiago, Beauchef 851, 8370456, Chile
| | - Isadora Berlanga Mora
- Department of Chemical Engineering, Biotechnology, and Materials, Faculty of Physical and Mathematical Sciences, University of Chile, Santiago, Beauchef 851, 8370456, Chile
| | - Carlos Gomez
- Chemistry Department, University of Valle-Yumbo, Valle del Cauca, 760501, Colombia
| | - María Elena Lienqueo
- Department of Chemical Engineering, Biotechnology, and Materials, Faculty of Physical and Mathematical Sciences, University of Chile, Santiago, Beauchef 851, 8370456, Chile; Center for Biotechnology and Bioengineering (CeBiB), Santiago, Beauchef 851, 8370456, Chile.
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Basurto-Lozada D, Hillier A, Medina D, Pulido D, Karaman S, Salas J. Dynamics of soil surface temperature with unmanned aerial systems. Pattern Recognit Lett 2020. [DOI: 10.1016/j.patrec.2020.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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10
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Ribeiro S, de Sousa D, Medina D, Castro R, Lopes A, Rocha M. Prevalence of gonorrhea and chlamydia in a community clinic for Men who Have Sex with Men in Portugal. Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz185.356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Men who have sex with men (MSM) are at greater risk for sexually transmitted infections (STIs). Data on MSM chlamydia and gonorrhea prevalence estimates and associated risk factors is scarce. To our knowledge, this is the first study to describe the prevalence and the determinants of both chlamydia and gonorrhea infections in MSM in Portugal.
Methods
We conducted a cross-sectional study using data from 1,832 visits to CheckpointLX, a community-based center for screening blood-borne viruses and other STIs in MSM.
Results
Overall prevalence of chlamydia or gonorrhea in our sample was 16.05%, with 14.23% coinfection and 40.73% asymptomatic presentation among those testing positive. Anorectal infection was most common for chlamydia (67.26%), followed by urethral (24.78%) and oral (19.47%) infection. Oral infection was most common for gonorrhea (55.63%), followed by anal (51.25%) and urethral (17.50%) infection. In multivariate analyses, young age (U = 94684, p = 0.014), being foreign-born (χ2=11.724, p = 0.003), reporting STI symptoms (χ2=5.316, p = 0.021), inhaled drug use (χ2=4.278, p = 0.039) and having a higher number of concurrent (χ2=18.769, p < 0.001) or total (χ2=5.988, p = 0.050) sexual partners were each associated with higher rates of chlamydia or gonorrhea infection.
Conclusions
Young and migrant MSM are a vulnerable population to STIs, as are those who use inhaled drugs and those with a higher number of concurrent or total sexual partners. Although Portugal has no guidelines on chlamydia and gonorrhea screening, our results point towards a need for greater awareness about the importance of high frequency screening for those at increased risk (i.e. every 3 to 6 months).
Key messages
Higher prevalence was found in young and migrant MSM, those with higher number of concurrent or total sexual partners, and those who use inhaled drugs. There is a need for greater awareness about the importance of high frequency STI screening for MSM at increased risk.
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Affiliation(s)
- S Ribeiro
- Department of International Health, CAPHRI, Maastricht University, Maastricht, Netherlands
- CheckpointLX, Grupo de Ativistas em Tratamentos, Lisbon, Portugal
| | - D de Sousa
- Faculty of Medicine, University of Porto, Porto, Portugal
| | - D Medina
- CheckpointLX, Grupo de Ativistas em Tratamentos, Lisbon, Portugal
| | - R Castro
- Instituto de Higiene e Medicina Tropical, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - A Lopes
- Instituto de Higiene e Medicina Tropical, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - M Rocha
- CheckpointLX, Grupo de Ativistas em Tratamentos, Lisbon, Portugal
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Oliva-Fanlo B, March S, Medina D, Martín-Rabadán M, Tamborero G, Stolper E, Esteva M. Prevalence and diagnostic value of GPs' gut feelings for cancer and serious diseases: protocol for a prospective observational study of diagnostic validity. BMJ Open 2019; 9:e032404. [PMID: 31662400 PMCID: PMC6830610 DOI: 10.1136/bmjopen-2019-032404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION Cancer diagnosis in primary care is an important challenge for general practitioners (GPs) due to the relatively low frequency of any single type of cancer and the heterogeneous signs and symptoms that can be present. In addition to analytical reasoning, GPs may become aware of gut feelings (GFs) as they suspect that a patient may have cancer or another serious disease. We aimed to investigate the prevalence and the predictive value of GFs for the diagnosis of cancer and serious diseases. METHODS AND ANALYSIS Prospective observational study of diagnostic validity. Participation will be offered to GPs from Majorca and Zaragoza (Spain). They will recruit all patients with a new reason for encounter during one or two workdays. GPs will complete the Gut Feelings Questionnaire (GFQ). Variables regarding patient, GP and consultation will be collected. Two and 6 months after the first visit, incident diagnoses of cancer or other serious diseases, diagnostic tests performed, referrals and new visits will be recorded. Analysis will include a descriptive analysis of the variables and prevalence of GFs, and the sensitivity, specificity, predictive values and likelihood ratios of the GFs (sense of alarm and sense of reassurance) for diagnosing cancer and other serious diseases, as measured with the GFQ. ETHICS AND DISSEMINATION The study has obtained approval from the Majorcan Primary Care Research Committee and from the Balearic Islands Ethical Committee, with reference number IB 3210/16 PI. The results may help GPs to make more accurate decisions about which patients need further examinations to rule out or to confirm a diagnosis of cancer or a serious disease, and which ones do not. The results will be published as part of the PhD project of the first author and in open access journals, and will be presented at medical conferences.
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Affiliation(s)
- Bernardino Oliva-Fanlo
- Primary Care Research Unit of Mallorca, Balearic Health Services-IbSalut, Palma, Spain
- UBS Porreres (CS Ses Roques Llises), Majorca Primary Care Department, Porreres, Spain
| | - Sebastià March
- Primary Care Research Unit of Mallorca, Balearic Health Services-IbSalut, Palma, Spain
- Can Misses Primary Health Centre, Balearic Islands Health Research Institute (IdISBa), Palma (I.Baleres), Spain
- Preventive Activities and Health Promotion Network, Carlos III Institute of Health (RedIAPP-RETICS), Madrid, Spain
| | - David Medina
- Primary Care Research Unit of Mallorca, Balearic Health Services-IbSalut, Palma, Spain
- Can Misses Primary Health Centre, Balearic Islands Health Research Institute (IdISBa), Palma (I.Baleres), Spain
- Preventive Activities and Health Promotion Network, Carlos III Institute of Health (RedIAPP-RETICS), Madrid, Spain
- Manacor Primary Health Centre, Majorca Primary Care Department, Manacor, Spain
| | - María Martín-Rabadán
- Primary Care Research Unit of Mallorca, Balearic Health Services-IbSalut, Palma, Spain
- Can Misses Primary Health Centre, Balearic Islands Health Research Institute (IdISBa), Palma (I.Baleres), Spain
- Preventive Activities and Health Promotion Network, Carlos III Institute of Health (RedIAPP-RETICS), Madrid, Spain
- Can Misses Primary Health Centre, Ibiza and Formentera Health District, Eivissa, Spain
| | - Gaspar Tamborero
- Primary Care Research Unit of Mallorca, Balearic Health Services-IbSalut, Palma, Spain
- Coll d'en Rabassa Primary Health Centre, Majorca Primary Care Department, Palma, Spain
| | - Erik Stolper
- Department of General Practice, Faculty of Health, Medicine and Life Sciences, Caphri School for Public Health and Primary Care, University of Maastricht, Maastricht, The Netherlands
- Department of Primary and Interdisciplinary Care, University of Antwerp, Antwerp, Belgium
| | - Magdalena Esteva
- Primary Care Research Unit of Mallorca, Balearic Health Services-IbSalut, Palma, Spain
- Can Misses Primary Health Centre, Balearic Islands Health Research Institute (IdISBa), Palma (I.Baleres), Spain
- Preventive Activities and Health Promotion Network, Carlos III Institute of Health (RedIAPP-RETICS), Madrid, Spain
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12
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Cox NA, Berrang ME, House SL, Medina D, Cook KL, Shariat NW. Population Analyses Reveal Preenrichment Method and Selective Enrichment Media Affect Salmonella Serovars Detected on Broiler Carcasses. J Food Prot 2019; 82:1688-1696. [PMID: 31536420 DOI: 10.4315/0362-028x.jfp-19-166] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [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: 11/11/2022]
Abstract
Poultry is a major Salmonella reservoir, but conventional culture-based methods typically identify the most abundant serovars while those less abundant remain undetected. Choice of enrichment procedure also introduces bias, and for broiler carcasses, a 1-min rinse before preenrichment is insufficient to release all Salmonella present. The inability to assess serovar diversity means that serovars more often associated with human illness may be masked by more abundant Salmonella. CRISPR-SeroSeq (serotyping by sequencing clustered regularly interspaced short palindromic repeats), an amplicon-based, next-generation sequencing tool, allows detection of multiple serovars and maps the relative serovar frequencies in a sample. To address the preceding limitations, CRISPR-SeroSeq was used on broiler carcasses collected prechilled at a commercial plant. Standard carcass rinse aliquot preenrichments and whole carcass preenrichments that were enriched in Rappaport-Vassiliadis (RV) and tetrathionate (TT) broths were compared. On average, five serovars were observed per carcass, including nine on one carcass. CRISPR-SeroSeq detected serovars comprising as little as 0.005% of the population. CRISPR-SeroSeq data matched (28 of 32) standard culture analysis for abundant serovars. Salmonella serovars Kentucky, Typhimurium, and Schwarzengrund were found on each carcass. Overall, serovar diversity was higher in whole carcass preenrichments that were enriched in RV (P < 0.05). Serovar Schwarzengrund was present at higher frequencies in whole carcass preenrichments compared with rinse aliquot preenrichments (t test, P < 0.05), suggesting it adheres more strongly to the carcass. Salmonella serovar Enteritidis was enriched eightfold more in TT than in RV, and serovars Schwarzengrund and Reading were preferentially enriched in RV. Comparison of preenriched and enriched samples suggests that selective enrichment in RV or TT was inhibitory to some serovars. This article addresses limitations of Salmonella surveillance protocols and provides information related to Salmonella population dynamics.
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Affiliation(s)
- Nelson A Cox
- U.S. National Poultry Research Center, Athens, Georgia 30605
| | - Mark E Berrang
- U.S. National Poultry Research Center, Athens, Georgia 30605
| | - Sandra L House
- U.S. National Poultry Research Center, Athens, Georgia 30605
| | - David Medina
- Biology Department, Gettysburg College, Gettysburg, Pennsylvania 17325
| | - Kimberly L Cook
- U.S. Department of Agriculture, Agricultural Research Service, Beltsville, Maryland 20705
| | - Nikki W Shariat
- Department of Population Health, Poultry Diagnostic and Research Center, University of Georgia, Athens, Georgia 30602, USA (ORCID: https://orcid.org/0000-0003-3943-4829 [N.W.S.])
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13
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Vernet Crua A, Medina D, Zhang B, González MU, Huttel Y, García-Martín JM, Cholula-Díaz JL, Webster TJ. Comparison of cytocompatibility and anticancer properties of traditional and green chemistry-synthesized tellurium nanowires. Int J Nanomedicine 2019; 14:3155-3176. [PMID: 31118629 PMCID: PMC6501707 DOI: 10.2147/ijn.s175640] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Background Traditional physicochemical approaches for the synthesis of compounds, drugs, and nanostructures developed as potential solutions for antimicrobial resistance or against cancer treatment are, for the most part, facile and straightforward. Nevertheless, these approaches have several limitations, such as the use of toxic chemicals and production of toxic by-products with limited biocompatibility. Therefore, new methods are needed to address these limitations, and green chemistry offers a suitable and novel answer, with the safe and environmentally friendly design, manufacturing, and use of minimally toxic chemicals. Green chemistry approaches are especially useful for the generation of metallic nanoparticles or nanometric structures that can effectively and efficiently address health care concerns. Objective Here, tellurium (Te) nanowires were synthesized using a novel green chemistry approach, and their structures and cytocompatibility were evaluated. Method An easy and straightforward hydrothermal method was employed, and the Te nanowires were characterized using transmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy, and optical microscopy for morphology, size, and chemistry. Cytotoxicity tests were performed with human dermal fibroblasts and human melanoma cells (to assess anticancer properties). The results showed that a treatment with Te nanowires at concentrations between 5 and 100 μg/mL improved the proliferation of healthy cells and decreased cancerous cell growth over a 5-day period. Most importantly, the green chemistry -synthesized Te nanowires outperformed those produced by traditional synthetic chemical methods. Conclusion This study suggests that green chemistry approaches for producing Te nanostructures may not only reduce adverse environmental effects resulting from traditional synthetic chemistry methods, but also be more effective in numerous health care applications.
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Affiliation(s)
- Ada Vernet Crua
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA, .,Nanomedicine Science and Technology Center, Northeastern University, Boston, MA, USA, .,Universitat Rovira I Virgili, Tarragona, Spain
| | - David Medina
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA, .,Nanomedicine Science and Technology Center, Northeastern University, Boston, MA, USA,
| | - Bohan Zhang
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA, .,Nanomedicine Science and Technology Center, Northeastern University, Boston, MA, USA,
| | - María Ujué González
- Instituto de Micro y Nanotechnologia, IMN-CNM, CSIC (CEI UAM+CSIC), Tres Cantos, Spain
| | - Yves Huttel
- Materials Science Factory, Instituto de Ciencias de Materiales, ICMN-CSIC, Madrid, Spain
| | | | - Jorge L Cholula-Díaz
- School of Engineering and Sciences, Tecnologico de Monterrey, Monterrey, NL, Mexico
| | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA, .,Nanomedicine Science and Technology Center, Northeastern University, Boston, MA, USA,
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Abstract
Music is a complex and properly human skill. Previous studies indicate that systematic musical training induces specific structural brain changes and improves audio-motor functions. However, whether these benefits can transfer into functional improvements of attentional skills is still little known. To shed light on this issue, in the present study we explored the relationship between long-term musical training and the efficiency of the attentional system. We used the attention network test (ANT) to compare the performance of the alerting, orienting and executive attentional networks of professional pianists against a matched group of non-musician adults. We found that musicians were significantly faster to respond across the ANT task, and that the executive attentional network was more efficient in musicians than non-musicians. We found no differences in the efficiency of the alerting and orienting networks between both groups. Interestingly, we found that the efficiency of the executive system improves with the years of musical training, even when controlling for age. We also found that the three attentional networks of the non-musicians were functionally independent. However, in the case of the musicians, the efficiency of the alerting and orienting systems was associated. These findings provide evidence of a potential transfer effect from systematic musical training into inhibitory attentional control.
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Affiliation(s)
- David Medina
- Department of Music, Universidad Metropolitana de Ciencias de la Educación, UMCE, 7760197, Santiago, Chile
| | - Paulo Barraza
- Centro de Investigación Avanzada en Educación, CIAE, Universidad de Chile, 8330014, Santiago, Chile
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Martí M, Medina D, Español G, Pérez M, Betancourt J. Estudio anatómico de la vascularización peroneal y su importancia clínica para el injerto vascularizado de peroné. Rev Iberoam Cir Mano 2017. [DOI: 10.1016/j.ricma.2016.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Introducción: Desde que Ueba utilizara por primera vez el injerto óseo vascularizado de peroné en 1973, esta técnica se ha usado con éxito como método de reconstrucción de múltiples tipos de defectos óseos. La correcta vascularización del injerto es clave para su supervivencia. El objetivo de este trabajo es describir la vascularización diafisaria y epifisaria proximal del peroné.Material y método: Se utilizaron 12 especímenes de cadáver criopreservado inyectados con látex negro. Se procedió a su disección, seguida de una técnica de corrosión en solución alcalina para demostrar la distribución de la red vascular del peroné de forma precisa.Resultados: Observamos que el peroné recibe su irrigación sobre todo de una abundante red de vasos periósticos en la diáfisis y en menor medida de la arteria nutricia. Apreciamos que la epífisis proximal presenta entre 2 y 6 ramos recurrentes, procedentes de las arterias tibial anterior y tronco tibioperoneo.Conclusión: El aporte vascular perióstico de la diáfisis del peroné es el mayoritario, siendo limitada la vascularización a través de la arteria nutricia. En la epífisis proximal, la presencia de vasos recurrentes accesorios puede ser de relevancia durante la cirugía.
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Affiliation(s)
- M.R. Martí
- Laboratorio de Macro-Microdisección y Anatomía Quirúrgica, Departamento de Anatomía y Embriología Humana, Facultad de Medicina, Universidad de Barcelona, Barcelona, España
- Servicio de Cirugía Ortopédica y Traumatología, Hospital de Traumatología Vall d’Hebron, Barcelona, España
| | - D. Medina
- Laboratorio de Macro-Microdisección y Anatomía Quirúrgica, Departamento de Anatomía y Embriología Humana, Facultad de Medicina, Universidad de Barcelona, Barcelona, España
| | - G.J. Español
- Laboratorio de Macro-Microdisección y Anatomía Quirúrgica, Departamento de Anatomía y Embriología Humana, Facultad de Medicina, Universidad de Barcelona, Barcelona, España
| | - M. Pérez
- Laboratorio de Macro-Microdisección y Anatomía Quirúrgica, Departamento de Anatomía y Embriología Humana, Facultad de Medicina, Universidad de Barcelona, Barcelona, España
- Servicio de Cirugía Ortopédica y Traumatología, Hospital de Traumatología Vall d’Hebron, Barcelona, España
| | - J.R. Betancourt
- Laboratorio de Macro-Microdisección y Anatomía Quirúrgica, Departamento de Anatomía y Embriología Humana, Facultad de Medicina, Universidad de Barcelona, Barcelona, España
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Clínic de Barcelona, Barcelona, España
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Affiliation(s)
- D. Medina
- Department of Cell Biology Baylor College of Medicine Houston, TX 77030
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Vidal-Martínez G, Vargas-Medrano J, Gil-Tommee C, Medina D, Garza NT, Yang B, Segura-Ulate I, Dominguez SJ, Perez RG. FTY720/Fingolimod Reduces Synucleinopathy and Improves Gut Motility in A53T Mice: CONTRIBUTIONS OF PRO-BRAIN-DERIVED NEUROTROPHIC FACTOR (PRO-BDNF) AND MATURE BDNF. J Biol Chem 2016; 291:20811-21. [PMID: 27528608 PMCID: PMC5034069 DOI: 10.1074/jbc.m116.744029] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Indexed: 11/06/2022] Open
Abstract
Patients with Parkinson's disease (PD) often have aggregated α-synuclein (aSyn) in enteric nervous system (ENS) neurons, which may be associated with the development of constipation. This occurs well before the onset of classic PD motor symptoms. We previously found that aging A53T transgenic (Tg) mice closely model PD-like ENS aSyn pathology, making them appropriate for testing potential PD therapies. Here we show that Tg mice overexpressing mutant human aSyn develop ENS pathology by 4 months. We then evaluated the responses of Tg mice and their WT littermates to the Food and Drug Administration-approved drug FTY720 (fingolimod, Gilenya) or vehicle control solution from 5 months of age. Long term oral FTY720 in Tg mice reduced ENS aSyn aggregation and constipation, enhanced gut motility, and increased levels of brain-derived neurotrophic factor (BDNF) but produced no significant change in WT littermates. A role for BDNF was directly assessed in a cohort of young A53T mice given vehicle, FTY720, the Trk-B receptor inhibitor ANA-12, or FTY720 + ANA-12 from 1 to 4 months of age. ANA-12-treated Tg mice developed more gut aSyn aggregation as well as constipation, whereas FTY720-treated Tg mice had reduced aSyn aggregation and less constipation, occurring in part by increasing both pro-BDNF and mature BDNF levels. The data from young and old Tg mice revealed FTY720-associated neuroprotection and reduced aSyn pathology, suggesting that FTY720 may also benefit PD patients and others with synucleinopathy. Another finding was a loss of tyrosine hydroxylase immunoreactivity in gut neurons with aggregated aSyn, comparable with our prior findings in the CNS.
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Affiliation(s)
- Guadalupe Vidal-Martínez
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Javier Vargas-Medrano
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Carolina Gil-Tommee
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - David Medina
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Nathan T Garza
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Barbara Yang
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Ismael Segura-Ulate
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Samantha J Dominguez
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
| | - Ruth G Perez
- From the Center of Emphasis in Neurosciences, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, Paul L. Foster School of Medicine, El Paso, Texas 79905
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Pérez M, Español G, Medina D, Betancourt J, Martí M. Estudio de las unidades neurofuncionales del flexor carpi ulnaris y su utilidad en las transferencias tendinosas. Rev Iberoam Cir Mano 2016. [DOI: 10.1016/j.ricma.2016.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
Objetivos: Este trabajo pretende documentar la inervación intramuscular del flexor carpi ulnaris (FCU), su vascularización, y su consecuente organización en unidades neurofuncionales. Así mismo, se discute la relevancia de dichas unidades en la realización de transferencias tendinosas de este músculo con su tendón dividido. Aunque en algunos centros ya se ha puesto en práctica la idea de dividir el tendón, hay pocos trabajos en la literatura que demuestren fotográficamente el sustrato anatómico subyacente.Material y métodos: Se tiñeron según la técnica de Sihler 6 FCU extraídos de cadáveres humanos criopreservados. Para estudiar su vascularización, en 5 de ellos se inyectó el árbol arterial con látex negro.Resultados: En todos los especímenes ambas cabezas del FCU se correspondían con dos unidades neurofuncionales que presentaban una inervación independiente (tipo iii de Taylor). Los 5 especímenes inyectados pertenecían a los tipos ii y iii de Mathes-Nahai.Conclusiones: La divisibilidad del músculo en 2 unidades neurofuncionales independientes con vascularización e inervación propia permite obtener 2 tendones transferibles a 2 músculos diferentes, optimizándose la transferencia.
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Affiliation(s)
- M. Pérez
- Laboratorio de Macro-Microdisección y Anatomía Quirúrgica, Departamento de Anatomía y Embriología Humana, Facultad de Medicina, Universidad de Barcelona, Barcelona, España
- Servicio de Cirugía Ortopédica y Traumatología, Hospital de Traumatología Vall d’Hebron, Barcelona, España
| | - G.J. Español
- Laboratorio de Macro-Microdisección y Anatomía Quirúrgica, Departamento de Anatomía y Embriología Humana, Facultad de Medicina, Universidad de Barcelona, Barcelona, España
| | - D. Medina
- Laboratorio de Macro-Microdisección y Anatomía Quirúrgica, Departamento de Anatomía y Embriología Humana, Facultad de Medicina, Universidad de Barcelona, Barcelona, España
| | - J.R. Betancourt
- Laboratorio de Macro-Microdisección y Anatomía Quirúrgica, Departamento de Anatomía y Embriología Humana, Facultad de Medicina, Universidad de Barcelona, Barcelona, España
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Clínic de Barcelona, Barcelona, España
| | - M.R. Martí
- Laboratorio de Macro-Microdisección y Anatomía Quirúrgica, Departamento de Anatomía y Embriología Humana, Facultad de Medicina, Universidad de Barcelona, Barcelona, España
- Servicio de Cirugía Ortopédica y Traumatología, Hospital de Traumatología Vall d’Hebron, Barcelona, España
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19
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Zheng ZY, Bu W, Tian L, Fan C, Gao X, Zhang X, Yu C, Wang H, Liao YH, Li Y, Lewis MT, Edwards D, Zwaka TP, Hilsenbeck SG, Medina D, Perou CM, Creighton CJ, Zhang XH, Chang EC. Abstract P2-06-11: Wild type N-Ras, overexpressed in basal-like breast cancer, promotes tumor formation by inducing IL8 secretion via JAK2 activation. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p2-06-11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
"Basal-like" breast cancer (BLBC) is a very aggressive subtype of breast cancer. BLBC has very poor prognosis — median time to distant recurrence is just 2.6 years vs. 5 years overall, and survival time from diagnosis of distant metastatic disease is 9 months vs. 22 months. BLBC tumors usually do not express ER, Her2, or progesterone receptor. As such, they cannot be treated by the current targeted therapies, which target these molecules. What drive the formation and progression of BLBCs is largely unclear.
Ras GTPases are best known for mediating growth factor signaling. Oncogenic mutations in the RAS genes, K-RAS in particular, are found in more than 30% of human tumors. Surprisingly, oncogenic RAS mutations are rare in breast cancer. However, we found that wild-type N-RAS is overexpressed in BLBCs, possibly partly via promoter demethylation, but not in other breast cancer subtypes. Repressing N-RAS inhibits transformation and tumor growth, while overexpressing it enhances these processes even in preinvasive BLBC cells. In contrast, in breast cancer cells of other subtypes, repressing N-RAS expression does not affect growth and transforming activities. We identified N-Ras-responsive genes, most of which encode chemokines and cytokines, e.g., IL8. High expression levels of these N-Ras-responsive genes as well as of N-RAS itself in tumors correlate with poor patient outcome. N-Ras, but not K-Ras, induces IL8 by binding and activating the cytoplasmic pool of JAK2; IL8 then acts on both the cancer cells and stromal fibroblasts.
In conclusion, N-Ras drives BLBC by promoting transformation in epithelial cells, which may in turn remodel the tumor microenvironment to create a proinvasive state. Although oncogenic mutations affecting RAS are common in many other human cancers, tumorigenesis in an important subset of breast cancers is driven instead by increasing activity of wild-type N-Ras. Thus, to fully assess the impact of Ras on tumorigenesis, the role of wild-type as well as mutant Ras proteins must be carefully examined.
Citation Format: Zheng Z-Y, Bu W, Tian L, Fan C, Gao X, Zhang X, Yu C, Wang H, Liao Y-H, Li Y, Lewis MT, Edwards D, Zwaka TP, Hilsenbeck SG, Medina D, Perou CM, Creighton CJ, Zhang XH, Chang EC. Wild type N-Ras, overexpressed in basal-like breast cancer, promotes tumor formation by inducing IL8 secretion via JAK2 activation. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P2-06-11.
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Affiliation(s)
- Z-Y Zheng
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - W Bu
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - L Tian
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - C Fan
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - X Gao
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - X Zhang
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - C Yu
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - H Wang
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - Y-H Liao
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - Y Li
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - MT Lewis
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - D Edwards
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - TP Zwaka
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - SG Hilsenbeck
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - D Medina
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - CM Perou
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - CJ Creighton
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - XH Zhang
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
| | - EC Chang
- Baylor College of Medicine; University of North Carolina-Chapel Hill; National Taiwan University Hospital
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Gratwicke B, Ross H, Batista A, Chaves G, Crawford AJ, Elizondo L, Estrada A, Evans M, Garelle D, Guerrel J, Hertz A, Hughey M, Jaramillo CA, Klocke B, Mandica M, Medina D, Richards‐Zawacki CL, Ryan MJ, Sosa‐Bartuano A, Voyles J, Walker B, Woodhams DC, Ibáñez R. Evaluating the probability of avoiding disease‐related extinctions of Panamanian amphibians through captive breeding programs. Anim Conserv 2016. [DOI: 10.1111/acv.12249] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- B. Gratwicke
- Center for Species Survival Smithsonian Conservation Biology Institute National Zoological Park Washington DC USA
| | - H. Ross
- Panama Amphibian Rescue and Conservation Project El Valle Amphibian Conservation Center Smithsonian Tropical Research Institute Panama Republic of Panama
| | - A. Batista
- Senckenberg Forschungsinstitut und Naturmuseum Frankfurt Frankfurt Germany
| | - G. Chaves
- Escuela de Biología Universidad de Costa Rica San José Costa Rica
| | - A. J. Crawford
- Department of Biological Sciences Universidad de los Andes Bogotá Colombia
- Smithsonian Tropical Research Institute Panama Republic of Panama
- Círculo Herpetológico de Panamá Panama Republic of Panama
| | - L. Elizondo
- Programa de Maestría en Ciencias Biológicas Universidad de Panamá Panama Republic of Panama
| | - A. Estrada
- Department of Biological Sciences Virginia Tech Blacksburg VA USA
| | - M. Evans
- Reptile Discovery Center Smithsonian's National Zoological Park Washington DC USA
| | - D. Garelle
- Cheyenne Mountain Zoo Colorado Springs CO USA
| | - J. Guerrel
- Panama Amphibian Rescue and Conservation Project Smithsonian Tropical Research Institute Panama Republic of Panama
| | - A. Hertz
- Senckenberg Forschungsinstitut und Naturmuseum Frankfurt Frankfurt Germany
- Institute for Ecology, Evolution and Diversity Biologicum Goethe‐University Frankfurt Germany
| | - M. Hughey
- Department of Biological Sciences Virginia Tech Blacksburg VA USA
| | - C. A. Jaramillo
- Smithsonian Tropical Research Institute Panama Republic of Panama
- Círculo Herpetológico de Panamá Panama Republic of Panama
- Departamento de Histología y Neuroanatomía Humana Facultad de Medicina Universidad de Panamá Panama Republic of Panama
- Biodiversity Consultant Group Panama Republic of Panama
| | - B. Klocke
- Department of Biology George Mason University Fairfax VA USA
| | - M. Mandica
- Department of Research and Conservation Atlanta Botanical Garden Atlanta GA USA
| | - D. Medina
- Department of Biological Sciences Virginia Tech Blacksburg VA USA
| | - C. L. Richards‐Zawacki
- Smithsonian Tropical Research Institute Panama Republic of Panama
- Department of Ecology and Evolutionary Biology Tulane University New Orleans LA USA
| | - M. J. Ryan
- Department of Biology and Museum of Southwestern Biology University of New Mexico Albuquerque NM USA
| | | | | | - B. Walker
- Biodiversity Consultant Group Panama Republic of Panama
| | - D. C. Woodhams
- Smithsonian Tropical Research Institute Panama Republic of Panama
- Department of Biology University of Massachusetts Boston Boston MA USA
| | - R. Ibáñez
- Círculo Herpetológico de Panamá Panama Republic of Panama
- Panama Amphibian Rescue and Conservation Project Smithsonian Tropical Research Institute Panama Republic of Panama
- Departamento de Zoología Universidad de Panamá Panama Republic of Panama
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Fahrenholtz SJ, Moon TY, Franco M, Medina D, Danish S, Gowda A, Shetty A, Maier F, Hazle JD, Stafford RJ, Warburton T, Fuentes D. A model evaluation study for treatment planning of laser-induced thermal therapy. Int J Hyperthermia 2015; 31:705-14. [PMID: 26368014 DOI: 10.3109/02656736.2015.1055831] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
A cross-validation analysis evaluating computer model prediction accuracy for a priori planning magnetic resonance-guided laser-induced thermal therapy (MRgLITT) procedures in treating focal diseased brain tissue is presented. Two mathematical models are considered. (1) A spectral element discretisation of the transient Pennes bioheat transfer equation is implemented to predict the laser-induced heating in perfused tissue. (2) A closed-form algorithm for predicting the steady-state heat transfer from a linear superposition of analytic point source heating functions is also considered. Prediction accuracy is retrospectively evaluated via leave-one-out cross-validation (LOOCV). Modelling predictions are quantitatively evaluated in terms of a Dice similarity coefficient (DSC) between the simulated thermal dose and thermal dose information contained within N = 22 MR thermometry datasets. During LOOCV analysis, the transient model's DSC mean and median are 0.7323 and 0.8001 respectively, with 15 of 22 DSC values exceeding the success criterion of DSC ≥ 0.7. The steady-state model's DSC mean and median are 0.6431 and 0.6770 respectively, with 10 of 22 passing. A one-sample, one-sided Wilcoxon signed-rank test indicates that the transient finite element method model achieves the prediction success criteria, DSC ≥ 0.7, at a statistically significant level.
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Affiliation(s)
- Samuel J Fahrenholtz
- a Department of Imaging Physics , M.D. Anderson Cancer Center, University of Texas , Houston , Texas , USA .,b Graduate School of Biomedical Sciences, University of Texas , Houston , Texas , USA
| | - Tim Y Moon
- c Department of Computational and Applied Mathematics , Rice University , Houston , Texas , USA
| | - Michael Franco
- c Department of Computational and Applied Mathematics , Rice University , Houston , Texas , USA
| | - David Medina
- c Department of Computational and Applied Mathematics , Rice University , Houston , Texas , USA
| | - Shabbar Danish
- d Department of Neurosurgery , Robert Wood Johnson Hospital , New Brunswick, New Jersey , USA , and
| | | | | | - Florian Maier
- a Department of Imaging Physics , M.D. Anderson Cancer Center, University of Texas , Houston , Texas , USA
| | - John D Hazle
- a Department of Imaging Physics , M.D. Anderson Cancer Center, University of Texas , Houston , Texas , USA .,b Graduate School of Biomedical Sciences, University of Texas , Houston , Texas , USA
| | - Roger J Stafford
- a Department of Imaging Physics , M.D. Anderson Cancer Center, University of Texas , Houston , Texas , USA .,b Graduate School of Biomedical Sciences, University of Texas , Houston , Texas , USA
| | - Tim Warburton
- c Department of Computational and Applied Mathematics , Rice University , Houston , Texas , USA
| | - David Fuentes
- a Department of Imaging Physics , M.D. Anderson Cancer Center, University of Texas , Houston , Texas , USA .,b Graduate School of Biomedical Sciences, University of Texas , Houston , Texas , USA
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22
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March S, Torres E, Ramos M, Ripoll J, García A, Bulilete O, Medina D, Vidal C, Cabeza E, Llull M, Zabaleta-del-Olmo E, Aranda JM, Sastre S, Llobera J. Adult community health-promoting interventions in primary health care: A systematic review. Prev Med 2015; 76 Suppl:S94-104. [PMID: 25625691 DOI: 10.1016/j.ypmed.2015.01.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 12/11/2014] [Accepted: 01/18/2015] [Indexed: 10/24/2022]
Abstract
OBJECTIVE To examine evidence on the effectiveness of health-promoting community interventions carried out in primary health care. METHODS Systematic review of originals and systematic reviews of health-promoting community interventions with the participation of primary health care. A working definition of community activities was used in the inclusion criteria. Databases searched up to 2013: PUBMED, EMBASE, CINHAL, Web of SCIENCE, IBECS, IME, and PSICODOC. No restrictions on year of publication or design. Articles were reviewed by separate researchers to identify risks of bias. RESULTS Fifty-one articles published between 1966 and 2013 were included: 11 systematic reviews and 40 originals that described 39 community interventions. There is evidence on the effectiveness of community interventions in reducing cardiovascular risk factors, encouraging physical exercise, preventing falls and improving self-care among chronic patients compared with usual individual care. The effectiveness of some interventions increases when the community is involved in their development. Most assessments show positive results despite design limitations. CONCLUSIONS The community approach may be more effective than the individual in usual preventive interventions in primary care. There is a lack of evidence on many community interventions in primary care and further research is needed.
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Affiliation(s)
- Sebastià March
- Research Unit, Mallorca Primary Care, Ib-Salut Balears, Reina Esclaramunda Street, 9, 07003 Palma, Spain; IUNICS-IdISPa, UIB, 07010 Palma, Spain.
| | - Elena Torres
- Research Unit, Mallorca Primary Care, Ib-Salut Balears, Reina Esclaramunda Street, 9, 07003 Palma, Spain; IUNICS-IdISPa, UIB, 07010 Palma, Spain.
| | - María Ramos
- IUNICS-IdISPa, UIB, 07010 Palma, Spain; Registro de Cáncer, Servicio de Epidemiología, Dirección General de Salud Pública y Consumo, Conselleria de Salut, Família i Benestar Social, Camí de Jesús 38 A, 07010 Palma, Spain.
| | - Joana Ripoll
- Research Unit, Mallorca Primary Care, Ib-Salut Balears, Reina Esclaramunda Street, 9, 07003 Palma, Spain; IUNICS-IdISPa, UIB, 07010 Palma, Spain.
| | - Atanasio García
- Mallorca Primary Care, Ib-Salut Balears, Centro de Salud Coll d'en Rabassa, Guayaquil Street, 9, 07006 Palma, Spain.
| | - Oana Bulilete
- Mallorca Primary Care, Ib-Salut Balears, Centro de Salud Son Pisà, Vicens Joan Rosselló Ribas Street, 65, 07011 Palma, Spain.
| | - David Medina
- IUNICS-IdISPa, UIB, 07010 Palma, Spain; Mallorca Primary Care, Ib-Salut Balears, Centro de Salud de Manacor, Central Street, 1, Son Macià, 07509 Manacor, Spain.
| | - Clara Vidal
- Research Unit, Mallorca Primary Care, Ib-Salut Balears, Reina Esclaramunda Street, 9, 07003 Palma, Spain; IUNICS-IdISPa, UIB, 07010 Palma, Spain.
| | - Elena Cabeza
- IUNICS-IdISPa, UIB, 07010 Palma, Spain; Dirección General de Salud Pública y Consumo, Conselleria de Salut, Família i Benestar Social, Camí de Jesús 38 A, 07010 Palma, Mallorca, Spain.
| | - Micaela Llull
- Mallorca Primary Care, Ib-Salut Balears, Centro de Salud Sant Agustí, Plaça Pça, Sant Salvador, 2, 07015 Gènova, Spain.
| | - Edurne Zabaleta-del-Olmo
- Institut Universitari d'Investigació en Atenció Primària (IDIAP) Jordi Gol, Gran Via de les Corts Catalanes, 587, 08007 Barcelona, Spain.
| | - José Manuel Aranda
- Grupo de Investigación en Salud Mental, Servicios y Atención Primaria (SAMSERAP), Centro de Salud San Andres Torcal, C/José Palanca, s/n, 29003 Málaga, Spain.
| | - Silvia Sastre
- Mallorca Primary Care, Ib-Salut Balears, Biblioteca Virtual de Ciencias de la Salud de las Islas Baleares, Reina Esclaramunda Street, 9, 07003 Palma, Spain.
| | - Joan Llobera
- Research Unit, Mallorca Primary Care, Ib-Salut Balears, Reina Esclaramunda Street, 9, 07003 Palma, Spain; IUNICS-IdISPa, UIB, 07010 Palma, Spain.
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23
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López G, Gelvez N, Urrego LF, Florez S, Rodríguez V, Tamayo ML, Medina D. Análisis Molecular de las Mutaciones 2299delG y C759F en Individuos Colombianos con Retinitis Pigmentosa e Hipoacusia Neurosensorial. nova 2014. [DOI: 10.22490/24629448.1038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Determinar la presencia de las mutaciones 2299delG y C759F en 37 individuos colombianos no relacionados que presentan RP e hipoacusia neurosensorial. Materiales y métodos: análisis de secuencia directa del exón 13 del gen USH2A en todos los individuos seleccionados para el estudio. Resultados: la mutación 2299delG fue observada únicamente en individuos con Síndrome de Usher tipo II, mientras que la mutación C759F, no fue identificada en los individuos del estudio.
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24
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Goya M, Cespedes MC, Camba F, Capote S, Felipe A, Reixachs A, Medina D, Gorraiz V, Pin S, Halachian C, Gracia A, Perapoch J, Cabero L, Carreras E. Antenatal corticosteroids and perinatal outcomes in infants born at 23-25 weeks of gestation. J Matern Fetal Neonatal Med 2014; 28:2084-9. [PMID: 25367557 DOI: 10.3109/14767058.2014.978280] [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] [Indexed: 11/13/2022]
Abstract
OBJECTIVES To evaluate the perinatal results of infants born between 23 and 25.6 weeks of gestation. METHODS Medical charts of all women giving birth prematurely (23-25.6 w) from January 2005 to December 2011 were retrospectively reviewed. Cases of malformed infants or deliveries elsewhere were excluded. RESULTS 198 infants were included. Chorioamnionitis occurred in 86 (43.4%) of the whole group: 26 (86.7%) in the 23-week; 35 (53.8%) in the 24-week and 25 (24.3%) in the 25-week groups. Foetal maturation with antenatal corticosteroids was complete in 119 cases (60.1%): 4 (13.3%) in the 23-week; 35 (53.8%) in the 24-week and 80 (77.7%) in the 25-week groups. Foetal death at birth occurred in 22 cases (11%) and 61 newborns (30.8%) died in the neonatal period. Of the 106 survivors with 2 years complete follow-up, 45 infants (42.4%) did not present sequelae; 16 infants (15.1%) had severe sequelae. A 66.6% (4) of infants born at 23 weeks of gestation did not present sequelae compared with a 32.3% (11) at 24 weeks and 45.4% (30) at 25 weeks. CONCLUSIONS The chorioamnionitis rate was higher when gestational age was lower. The foetal maturation rate was higher when gestational age was higher. A low severe sequelae rate was observed in the whole series, particularly in the 23-week group where the rate was lower than expected; however, these results could have been influenced by the small size of the 23-week group.
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Affiliation(s)
- M Goya
- a Department of Obstetrics and Gynecology, Maternal-Fetal Medicine Unit , Hospital Vall d'Hebron , Barcelona , Spain and
| | - M C Cespedes
- b Department of Pediatrics, Neonatal Intensive Care Unit , Hospital Vall d'Hebron , Barcelona , Spain
| | - F Camba
- b Department of Pediatrics, Neonatal Intensive Care Unit , Hospital Vall d'Hebron , Barcelona , Spain
| | - S Capote
- a Department of Obstetrics and Gynecology, Maternal-Fetal Medicine Unit , Hospital Vall d'Hebron , Barcelona , Spain and
| | - A Felipe
- b Department of Pediatrics, Neonatal Intensive Care Unit , Hospital Vall d'Hebron , Barcelona , Spain
| | - A Reixachs
- a Department of Obstetrics and Gynecology, Maternal-Fetal Medicine Unit , Hospital Vall d'Hebron , Barcelona , Spain and
| | - D Medina
- b Department of Pediatrics, Neonatal Intensive Care Unit , Hospital Vall d'Hebron , Barcelona , Spain
| | - V Gorraiz
- a Department of Obstetrics and Gynecology, Maternal-Fetal Medicine Unit , Hospital Vall d'Hebron , Barcelona , Spain and
| | - S Pin
- b Department of Pediatrics, Neonatal Intensive Care Unit , Hospital Vall d'Hebron , Barcelona , Spain
| | - C Halachian
- a Department of Obstetrics and Gynecology, Maternal-Fetal Medicine Unit , Hospital Vall d'Hebron , Barcelona , Spain and
| | - A Gracia
- a Department of Obstetrics and Gynecology, Maternal-Fetal Medicine Unit , Hospital Vall d'Hebron , Barcelona , Spain and
| | - J Perapoch
- b Department of Pediatrics, Neonatal Intensive Care Unit , Hospital Vall d'Hebron , Barcelona , Spain
| | - L Cabero
- a Department of Obstetrics and Gynecology, Maternal-Fetal Medicine Unit , Hospital Vall d'Hebron , Barcelona , Spain and
| | - E Carreras
- a Department of Obstetrics and Gynecology, Maternal-Fetal Medicine Unit , Hospital Vall d'Hebron , Barcelona , Spain and
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Paranjpe DA, Medina D, Nielsen E, Cooper RD, Paranjpe SA, Sinervo B. Does Thermal Ecology Influence Dynamics of Side-Blotched Lizards and Their Micro-Parasites? Integr Comp Biol 2014; 54:108-17. [DOI: 10.1093/icb/icu069] [Citation(s) in RCA: 13] [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: 11/14/2022] Open
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26
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Contreras JM, Medina D, López-Carrasquero F, Contreras RR. Ring-opening polymerization of ε-caprolactone initiated by samarium acetate. J Polym Res 2013. [DOI: 10.1007/s10965-013-0244-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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27
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Pillai AS, Medina D. Rash in an eight-year-old boy. Am Fam Physician 2012; 86:1141-1142. [PMID: 23316988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Affiliation(s)
- A S Pillai
- The Methodist Hospital Family Medicine Residency Program, Houston, TX, USA. ASpillai@tmhs. org
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28
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Medina D, Sachs L. Cell-virus Interactions with the Polyoma Virus: The Induction of Cell Transformation and Malignancy in vitro. Br J Cancer 2012; 15:885-904. [PMID: 21772457 PMCID: PMC2071015 DOI: 10.1038/bjc.1961.102] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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29
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Nescolarde L, Yanguas J, Medina D, Rodas G, Rosell-Ferrer J. Assessment and follow-up of muscle injuries in athletes by bioimpedance: preliminary results. Annu Int Conf IEEE Eng Med Biol Soc 2012; 2011:1137-40. [PMID: 22254515 DOI: 10.1109/iembs.2011.6090266] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Mono-frequency (50 kHz) whole-body and segmental bioimpedance is measured before sport training in 14 high performance athletes. The athletes are classified in two groups according to the team sport: football and basketball. Bioelectrical impedance vector analysis (BIVA) method is used to obtain the individual whole-body impedance and 6 segmental impedance vectors in the main muscular groups in the lower-limbs. The whole-body vector is analyzed in the tolerance ellipses of the reference population. Individual impedance vector components are standardized by the height H of the subject, (R/H and Xc/H) to obtain the impedance vector (Z/H) of each segment. The hypotheses of the study are: 1) Not all the sports have the same pattern of bioimpedance vector by muscle group. 2) In elite well trained athletes their muscle groups are symmetrical (right and left sides), thus each athlete is its own reference for future comparisons. 3) We expect a change in the two components of bioimpedance vector (R/H and Xc/H) in front of a muscle injury. In order to compare the differences between the complex Z/H vector (R/H, Xc/H) we use Hotelling's T2 test. Preliminary results show a significant difference (P < 0.05) in bioimpedance vectors between groups according to the team sport, and also between normal muscle condition and after muscle injury producing hyper-hydration.
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Affiliation(s)
- L Nescolarde
- Electronic Engineering Department, Universitat Politècnica de Catalunya, Barcelona, Spain.
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30
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Zahiri H, Lumpkins K, Kelishadi S, Zhu Y, Medina D, Stromberg J, Silverman R, Holton L, Singh D. Significant Predictors of Complications Post Sternal Wound Reconstruction: A 21-Year Experience. J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.027] [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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31
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Valdez K, Smith W, Fan F, Medina D, Behbod F. Abstract P1-03-12: The First Reproducible Model of Primary Human Ductal Carcinoma In Situ (DCIS) Using the Mouse Intraductal (MIND) Method. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p1-03-12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Past studies of the molecular mechanisms regulating human DCIS progression to invasion have been limited by a lack of suitable human models. The current models have not utilized primary human DCIS placed in their natural microenvironment, i.e., inside the mammary ducts, and do not mimic the heterogeneity of human DCIS. Previously, we reported the development of a mouse xenograft model using established breast DCIS cell lines, SUM-225 and DCIS.COM by the mouse intraductal (MIND) method. MIND involves injection of human DCIS cells into the primary ducts of immunodeficient mouse mammary glands via the nipple. In this study we demonstrate the reproducible growth of human primary DCIS cells derived from patient biopsy samples using the MIND model. Core biopsies from consenting patients are processed to isolate the epithelial cell component and injected. To date, 69 patients have consented to provide core biopsy tissue and we have received tissue from 38. Of these, 14 samples have been confirmed as positive for DCIS, and 2 as atypical hyperplasia, based on the pathology report of adjacent biopsies. The biopsy samples were heterogeneous with respect to ER, PR, Ki67, Her-2 and histology. A total of 24 mammary glands from immunodeficient mice have been injected with these cells and analyzed for growth by immunofluorescent (IF) with antibodies directed at human-specific cytokeratin-5 and/or 19 and smooth muscle actin.
Table 1. Summary of grewlh of human primary biopsies in (tie MIND xenograft
The average number of cells recovered per mg of tissue are shown in Table 1. Biopsies diagnosed as normal yielded only 91±34 cells/mg compared with most DCIS cases that showed an average cell number of 971 per mg tissue. Our results indicate that human DCIS and hyperplasia cells from biopsy samples are capable of growing within the NOD-SCID IL2Rgammanull (NSG) mouse mammary ducts. NSG mice mammary ducts are more suitable hosts for the growth of human primary DCIS cells, compared to SCID-Beige. Furthermore, the higher number of cells recovered following digestion predicted the positive DCIS growth rate. DCIS cells formed single and multi-layered epithelium inside the ducts and were heterogeneous with respect to the expression of human specific cytokeratins. The MIND xenografts recapitulated the patient's original DCIS as evidenced by IF staining for the biomarkers ER and Her-2 in the primary human biopsies and MIND xenografts. These results provide the first reproducible model of primary human DCIS for studying the temporal processes of early breast cancer progression. Future experiments will characterize the cellular basis for the subtypes of DCIS and delineate the distinct molecular and cellular mechanisms of early breast cancer invasion, and cancer stem cell growth and self-renewal.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P1-03-12.
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Affiliation(s)
- K Valdez
- University of Kansas Medical Center; Baylor College of Medicine
| | - W Smith
- University of Kansas Medical Center; Baylor College of Medicine
| | - F Fan
- University of Kansas Medical Center; Baylor College of Medicine
| | - D Medina
- University of Kansas Medical Center; Baylor College of Medicine
| | - F. Behbod
- University of Kansas Medical Center; Baylor College of Medicine
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Correa-Illanes G, Calderón W, Roa R, Piñeros JL, Dote J, Medina D. Treatment of localized post-traumatic neuropathic pain in scars with 5% lidocaine medicated plaster. Local Reg Anesth 2010; 3:77-83. [PMID: 22915873 PMCID: PMC3417952 DOI: 10.2147/lra.s13082] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To evaluate the use of 5% lidocaine medicated plaster (LMP) for treating painful scars resulting from burns or skin degloving. PATIENTS AND METHODS This was a prospective, observational case series study in individuals with painful scars <70 cm(2) in area, caused by burns or skin degloving. The study included a structured questionnaire incorporating demographic variables, pain evaluation using the numeric rating scale (NRS), the DN4 questionnaire, and measurement of the painful surface area. Patients with open wounds in the painful skin or with severe psychiatric disease were excluded. RESULTS Twenty-one men and eight women were studied, aged (mean + standard deviation) 41.4 ± 11.0 years, with painful scars located in the upper extremity (n = 9), lower extremity (n = 19), or trunk (n = 1). Eleven patients (37.9%) had an associated peripheral nerve lesion. The scars were caused by burns (n = 13), degloving (n = 7), and/or orthopedic surgery (n = 9). The duration of pain before starting treatment with lidocaine plaster was 9.7 ± 10.0 (median 6) months. The initial NRS was 6.66 ± 1.84 points, average painful area 23.0 ± 18.6 (median 15) cm(2), and DN4 score 4.7 ± 2.3 points. The duration of treatment with LMP was 13.9 ± 10.2 (median 11) weeks. After treatment, the NRS was reduced by 58.2% ± 27.8% to 2.72 ± 1.65. The average painful area was reduced by 72.4% ± 24.7% to 6.5 ± 8.6 (median 5) cm(2). Nineteen patients (69%) showed functional improvement following treatment. CONCLUSION LMP was useful for treating painful scars with a neuropathic component, producing meaningful reductions in the intensity of pain and painful surface area. This is the first time that a decrease in the painful area has been demonstrated in neuropathic pain using topical therapy, and may reflect the disease-modifying potential of LMP.
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Affiliation(s)
- Gerardo Correa-Illanes
- Servicio de Rehabilitación, Profesor Adjunto Universidad de Chile, Hospital del Trabajador de Santiago, Santiago, Chile
| | - Wilfredo Calderón
- Jefe Servicio Cirugía Plástica y Quemados, Hospital del Trabajador de Santiago, Santiago, Chile
| | - Ricardo Roa
- Servicio de Cirugía Plástica y Quemados, Hospital del Trabajador de Santiago, Santiago, Chile
| | - José Luis Piñeros
- Servicio de Cirugía Plástica y Quemados, Hospital del Trabajador de Santiago, Santiago, Chile
| | - Jacqueline Dote
- Servicio de Rehabilitación, Hospital del Trabajador de Santiago, Santiago, Chile
| | - David Medina
- Servicio de Rehabilitación, Hospital del Trabajador de Santiago, Santiago, Chile
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Lee S, Wu Y, Dao B, Lim A, Medina D, Stewart S, Allred D. Genes Regulating the Progression of Human Ductal Carcinoma In Situ to Invasive Breast Cancer. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-6141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Rationale: The progression of human ductal carcinoma in situ (DCIS) to invasive breast cancer (IBC) represents a major potentially life-threatening event. Our understanding of this process is rudimentary. Improved understanding could lead to better ability to predict and new therapeutic strategies to prevent progression, which would be major contributions to health care. Objectives: To identify genes involved in regulating the progression of human DCIS to IBC, and to confirm their involvement utilizing relevant in vitro and in vivo model systems. Methods: Gene expression profiles were evaluated in five complimentary cohorts of human DCIS and IBC (total n=59 in each category) using cDNA microarray technology. Supervised statistical comparisons were used to identify differentially expressed genes in each cohort. The genes were distilled to top priority candidates by the following vetting strategy: (1) expression changed in same direction in 2 or more cohorts; and (2) they possessed known biological functions which might reasonably be involved in regulating tumor invasion; and (3) they had not been studied in the context of breast cancer invasion. Initial studies have focused on candidate invasion-suppressor genes (down-regulated in IBC vs. DCIS). A human DCIS-like cell line (DCIS.COM) was stably transduced with shRNAi against the genes (3-5 hairpins each) and evaluated in vitro and in vivo for changes in invasion-related behaviors vs. controls (growth and migration in 2D and 3D cell cultures, invasion in 3D culture, and a human-in-mouse [HIM} DCIS xenograft model). The latter is a novel method we developed where cells are injected into the nipple duct of intact mammary glands of immune-compromised mice. They initially grow as DCIS which progress to IBC at varying rates depending on the cells. Results: Two novel invasion-suppressor genes (CSTA and FAT1) were identified based on demonstrating significantly increased growth, migration, and invasion in the assays described. In particular, shCSTA (n=22) and shFAT1 (n=22) HIM DCIS xenografts progressed to large IBCs by 10 weeks or less, significantly (P<.0001) greater than observed in controls (n=26) (67%, 64%, vs. 26%, respectively). Conclusions: We have identified two genes (CSTA and FAT1) whose normal functions appear to suppress the progression of human DCIS to IBC. These results could lead to new therapeutic strategies to prevent or suppress progression.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 6141.
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Affiliation(s)
- S. Lee
- 1Washinton University School of Medicine, MO,
| | - Y. Wu
- 2Baylor College of Medicine, TX,
| | - B. Dao
- 3Washington University School of Medicine, MO,
| | - A. Lim
- 3Washington University School of Medicine, MO,
| | | | - S. Stewart
- 3Washington University School of Medicine, MO,
| | - D. Allred
- 1Washinton University School of Medicine, MO,
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Liu Y, Morales-Cueto R, Hargrove J, Medina D, Zhang J. Measurements of peroxy radicals using chemical amplification-cavity ringdown spectroscopy. Environ Sci Technol 2009; 43:7791-7796. [PMID: 19921895 DOI: 10.1021/es901146t] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The peroxy radical chemical amplification (PERCA) method is combined with cavity ringdown spectroscopy(CRDS) to detect peroxy radicals (HO2 and RO2). In PERCA, HO2 and RO2 are first converted to NO2 via reactions with NO, and the OH and RO coproducts are recycled back to HO2 in subsequent reactions with CO and O2; the chain reactions of HO2 are repeated and amplify the level of NO2. The amplified NO2 is then monitored by CRDS, a sensitive absorption technique. The PERCA-CRDS method is calibrated using a HO2 radical source (0.5-3 ppbv), which is generated by thermal decomposition of H2O2 vapor (permeated from 2% H2O2 solution through a porous Teflon tubing) up to 600 degrees C. Using a 2-m long 6.35-mm o.d. Teflon tubing as the flow reactor and 2.5 ppmv NO and 2.5-10% vol/vol CO, the PERCA amplification factor or chain length, Delta[NO2]/([HO2]+[RO2]), is determined to be 150 +/- 50 (90% confidence limit) in this study. The peroxy radical detection sensitivity by PERCA-CRDS is estimated to be approximately 10 pptv/60 s (3sigma). Ambient measurements of the peroxy radicals are carried out at Riverside, California in 2007 to demonstrate the PERCA-CRDS technique.
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Affiliation(s)
- Yingdi Liu
- Department of Chemistry, University of California, Riverside, California 92521, USA
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Tamayo ML, Olarte M, Gelvez N, Gómez M, Frías JL, Bernal JE, Florez S, Medina D. Molecular studies in the GJB2 gene (Cx26) among a deaf population from Bogotá, Colombia: results of a screening program. Int J Pediatr Otorhinolaryngol 2009; 73:97-101. [PMID: 19027181 DOI: 10.1016/j.ijporl.2008.10.001] [Citation(s) in RCA: 17] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Revised: 09/28/2008] [Accepted: 10/01/2008] [Indexed: 10/21/2022]
Abstract
OBJECTIVE We conducted a pilot screening program to define the prevalence of non-syndromic deafness and establish the frequency of mutations in the GJB2 gene (Cx26) in a population of children with congenital deafness in Bogotá, Colombia. METHOD From a cohort of 731 children in 8 institutions for the deaf, we identified 322 (44%) with presumed non-syndromic deafness. These were invited to a more detailed evaluation, but 46 chose not to participate. The remaining 276 individuals received a complete ophthalmological evaluation that was normal in 205 (74.3%) and showed salt and pepper retinopathy in 55 (19.9%) and other ocular abnormalities in 16 (5.8%). A comprehensive medical history, and a detailed physical examination were performed in the 205 children with normal ocular exam. Of these, 93 were found to have acquired deafness and/or associated anomalies and 112 (15.3% of the initial 731 children), non-syndromic deafness. The GJB2 gene was sequenced in these 112 individuals. RESULTS Based on family history, 59.8% (67/112) of these cases had autosomal recessive non-syndromic sensorineural hearing loss and the remaining 40.2% (45/112) were sporadic, without apparent known cause. We identified three mutations in the GJB2 gene: 35delG, S199F, and 167delT, all of which have been previously reported in the literature, the variant M34T, and the polymorphism V27I. S199F was the most frequent mutation (17.9%), followed by 35delG (17.0%) and 167delT (0.4%). The mutations in the GJB2 gene were present in 50.7% of the autosomal recessive group and in 33.3% of the sporadic cases. CONCLUSIONS Our pilot study showed that 15.3% of institutionalized deaf children in Bogotá have non-syndromic deafness and among them, the frequency of the S199F mutation was higher than reported in previous studies, whereas the frequency of the 35delG is similar to Caucasian populations. The fact that the S199F mutation was the most frequent allele in our study confirms the fact that the prevalence of GJB2 mutations depends on the ethnic origin. We emphasize the need to follow a strict protocol to identify bona fide cases of non-syndromic deafness among individuals with congenital hearing loss in order to identify the molecular basis of this condition.
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Affiliation(s)
- M L Tamayo
- Instituto de Genética Humana, Universidad Javeriana, Bogotá, Colombia.
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Medina D, Gosling G, Shaende J, Portmann D. How to manage post stapedotomy reparative granuloma. Rev Laryngol Otol Rhinol (Bord) 2009; 130:323-326. [PMID: 20597423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
UNLABELLED Different techniques for restoration of hearing in patients with conductive hearing loss due to otosclerosis have been developed with excellent hearing improvement in most of the cases. However, nowadays complications and failures still compromise expected results and necessitate revision surgery. OBJECTIVE This article aims to report the management of reparative granuloma after stapes surgery. CASE REPORT A case of poststapedotomy sudden sensory hearing loss is described. A reparative granuloma was found and removed during revision surgery. All the symptoms including hearing and tinnitus returned to normal. This patient did not present vertigo. CONCLUSION Hypothesis to explain this evolution is exposed. Reparative granuloma is an emergency and needs as soon as possible a revision surgery.
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Affiliation(s)
- D Medina
- G. Portmann Institute, 114 avenue d'Arès, 33074 Bordeaux cedex, France
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37
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Donehower L, Gatza C, Hinkal G, Moore L, Parikh N, Chambers S, Kittrell F, Xu J, Lee A, Medina D, Goodell M. Insights into stem cells and aging provided by a P53 mutant mouse. Crit Rev Oncol Hematol 2008. [DOI: 10.1016/s1040-8428(08)70026-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: 10/21/2022] Open
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Schem C, Li Z, Maass N, Jonat W, Medina D, Shi YH, Zhang M. Correlation of COX2 expression with tumor-induced osteoclastic lesions in breast cancer bone metastasis. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.1116] [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: 11/20/2022] Open
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Tamayo ML, Gelvez N, Rodriguez M, Florez S, Varon C, Medina D, Bernal JE. Screening program for Waardenburg syndrome in Colombia: clinical definition and phenotypic variability. Am J Med Genet A 2008; 146A:1026-31. [PMID: 18241065 DOI: 10.1002/ajmg.a.32189] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A screening program to detect Waardenburg syndrome (WS) conducted between 2002 and 2005, among 1,763 deaf individuals throughout Columbia identified 95 affected individuals belonging to 95 families, giving a frequency of 5.38% of WS among the institutionalized deaf population. We confirmed the clinical diagnosis of WS in the 95 propositi and, through the family evaluation, we also identified 45 non-institutionalized affected relatives. Audiologic, ophthalmologic, and genetic studies were performed to confirm the diagnosis. Following the classification of the WS consortium, based on the Waardenburg Index (WI), to define the type of WS. We classified 62.1% of the propositi as WS2 and 37.9% as WS1. We present here the results of the study of clinical manifestations, analyzing the presence, severity, and symmetry of clinical findings among this affected population. Overall, among the 95 propositi, in addition to sensorineural deafness in all, the most frequent features were broad nasal root (58.9%), a first degree relative affected (37.9%), heterochromia irides (36.8%), skin hypopigmentation (31.6%), white forelock (28.0%), intense blue iris (27.4%), synophrys (12.6%), premature graying (10.5%), ptosis of the eyelids (9.5%), and hypoplasia alae nasi (1.1%). The majority of individuals had normal psychomotor development (87%), while the remaining 13% had developmental delay. Among the latter, 9.4% corresponded to WS2 and 3.6% to WS1. Our data confirm an interesting inter- and intrafamilial variability in the phenotypic manifestations as well as extremely variable expression.
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Affiliation(s)
- Marta L Tamayo
- Instituto de Genética Humana, Facultad de Medicina, Universidad Javeriana, Bogotá, Colombia.
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Tamayo ML, Lopez G, Gelvez N, Medina D, Kimberling WJ, Rodríguez V, Tamayo GE, Bernal JE. Genetic counseling in Usher syndrome: linkage and mutational analysis of 10 Colombian families. Genet Couns 2008; 19:15-27. [PMID: 18564497] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Usher Syndrome (US), an autosomal recessive disease, is characterized by retinitis pigmentosa (RP), vestibular dysfunction, and congenital sensorineural deafness. There are three recognized clinical types of the disorder. In order to improve genetic counseling for affected families, we conducted linkage analysis and DNA sequencing in 10 Colombian families with confirmed diagnosis of US (4 type I and 6 type II). Seventy-five percent of the US1 families showed linkage to locus USH1B, while the remaining 25% showed linkage to loci USH1B and USH1C. Among families showing linkage to USH1B we found two different mutations in the MYO7A gene: IVS42-26insTTGAG in exon 43 (heterozygous state) and R634X (CGA-TGA) in exon 16 (homozygous state). All six US2 families showed linkage to locus USH2A. Of them, 4 had c.2299delG mutation (1 homozygote state and 3 heterozygous); in the remaining 2 we did not identify any pathologic DNA variant. USH2A individuals with a 2299delG mutation presented a typical and homogeneous retinal phenotype with bilateral severe hearing loss, except for one individual with a heterozygous 2299delG mutation, whose hearing loss was asymmetric, but more profound than in the other cases. The study of these families adds to the genotype-phenotype characterization of the different types and subtypes of US and facilitates genetic counseling in these families. We would like to emphasize the need to perform DNA studies as a prerequisite for genetic counseling in affected families.
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Affiliation(s)
- M L Tamayo
- Instituto de Genética Humana, Universidad Javeriana, Bogotá, Colombia.
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41
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Medina D, Kittrell FS, Tsimelzon A, Fuqua SAW. Inhibition of mammary tumorigenesis by estrogen and progesterone in genetically engineered mice. Ernst Schering Found Symp Proc 2008:109-26. [PMID: 18540570 DOI: 10.1007/2789_2007_058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Estrogen and progesterone play a critical role in normal and neoplastic development of the mammary gland. A long duration of estrogen and progesterone exposure is associated with increased breast cancer risk, and a short duration of the same doses of these hormones is associated with a reduced breast cancer risk. The protective effects of estrogen and progesterone have been extensively studied in animal models. Several studies have demonstrated that these hormones induce persistent and long-lasting alterations in gene expression in the mammary epithelial cells. In the experiments discussed herein, the protective effect of estrogen and progesterone is shown to occur in genetically engineered mice (the p53-null mammary gland). The protective effect is associated with a decrease in cell proliferation. The effects of hormones seem to manifest as a delay in premalignant progression. In the nontumor-bearing glands of hormone-treated mice, premalignant foci are present at the time the control glands are actively developing mammary tumors. If the hormone-treated cells are transplanted from the treated host to the untreated host, the cells resume their predetermined tumorigenic potential. The protective effect reflects both host-mediated factors (either stroma-determined or systemic factors) and mammary epithelial intrinsic changes. If normal, untreated p53 cells are transplanted into a host that has been previously treated with a short dose of hormones, the cells exhibit a significant delay in tumorigenesis. The relative contributions of host-mediated factors and mammary cell intrinsic factors remain to be determined. Current studies are moving this research area from the biological to the molecular realm and from the rodent models to human studies and offer the potential for directing prevention efforts at specific molecular targets.
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Affiliation(s)
- D Medina
- Department of Molecular and Cellular Biology, and Baylor Breast Center, Baylor College of Medicine, One Baylor Plaza, 77030 Houston, USA.
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Hargrove J, Wang L, Muyskens K, Muyskens M, Medina D, Zaide S, Zhang J. Cavity ring-down spectroscopy of ambient NO2 with quantification and elimination of interferences. Environ Sci Technol 2006; 40:7868-73. [PMID: 17256540 DOI: 10.1021/es061287o] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Ambientdetection of NO2 by cavity ring-down spectroscopy is examined in the wavelength region near 405.23 nm, and possible interferences by particulates, water vapor, and carbon dioxide are characterized. Particulates can be efficiently removed by the use of a 0.45 microm fluoropolymer filter. Water vapor has a response of 2.8 ppb (NO2 equivalent) for 1.0% water vapor (80% relative humidity at 10 degrees C) in air at 405.23 nm in a broad continuous absorption feature. Carbon dioxide has a response of 0.8 ppb (NO2 equivalent) for 1.0% CO2 attributable to Rayleigh scattering and would not contribute significant interference in ambient measurements due to the lower ambient CO2 levels. Water vapor interference and in general broad background in the absorption spectrum can be accounted for by removing NO2 selectively in the ambient air stream with an annular denuder coated with sodium hydroxide and methoxyphenol (guiacol). Subtraction of the resulting background signal provides NO2 measurements with a limit of detection of 150 ppt/10 s (SIN = 3). Reliable NO2 measurements could be obtained by this method without the need for frequent calibration with calibration gas. Ambient NO2 measurements are carried out to demonstrate this method.
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Affiliation(s)
- James Hargrove
- Department of Chemistry, University of California, Riverside, California 92521, USA
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43
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Schmitt M, Walker MP, Richards RG, Bocchinfuso WP, Fukuda T, Medina D, Kittrell FS, Korach KS, DiAugustine RP. Expression of heregulin by mouse mammary tumor cells: role in activation of ErbB receptors. Mol Carcinog 2006; 45:490-505. [PMID: 16482517 DOI: 10.1002/mc.20180] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The inappropriate activation of one or more members of the ErbB family of receptor tyrosine kinases [ErbB-1 (EGFR), ErbB-2, ErbB-3, ErbB-4] has been linked with oncogenesis. ErbB-2 is frequently coexpressed with ErbB-3 in breast cancer cells and in the presence of the ligand heregulin (HRG) the ErbB-2/ErbB-3 receptors form a signaling heterodimer that can affect cell proliferation and apoptosis. The major goal of the present study was to determine whether endogenous HRG causes autocrine/paracrine activation of ErbB-2/ErbB-3 and contributes to the proliferation of mammary epithelial tumor cells. Tyrosine-phosphorylated (activated) ErbB-2 and ErbB-3 receptors were detected in the majority of extracts from tumors that had formed spontaneously or as a result of oncogene expression. HRG-1 transcripts and protein were found in the epithelial cells of most of these mouse mammary tumors. Various mouse mammary cell lines also contained activated ErbB-2/ErbB-3 and HRG transcripts. A approximately 50 kDa C-terminal fragment of pro-HRG was detected, which indicates that the HRG-1 precursor is readily processed by these cells. It is likely that the secreted mature HRG activated the ErbB-2/3 receptors. Addition of an antiserum against HRG to the mammary epithelial tumor cell line TM-6 reduced ErbB-3 Tyr-phosphorylation. Treatment with HRG-1 siRNA oligonucleotides or infection with a retroviral construct to stably express HRG siRNA effectively reduced HRG protein levels, ErbB-2/ErbB-3 activation, and the rate of proliferation, which could be reversed by the addition of HRG. The cumulative findings from these experiments show that coexpression of the HRG ligand contributes to activation of ErbB-2/Erb-3 in mouse mammary tumor cells in an autocrine or paracrine fashion.
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Affiliation(s)
- M Schmitt
- Laboratory of Molecular Carcinogenesis, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, USA
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Thiery JP, Sastre-Garau X, Vincent-Salomon B, Sigal-Zafrani X, Pierga JY, Decraene C, Meyniel JP, Gravier E, Asselain B, De Rycke Y, Hupe P, Barillot E, Ajaz S, Faraldo M, Deugnier MA, Glukhova M, Medina D. Challenges in the stratification of breast tumors for tailored therapies. Bull Cancer 2006; 93:E81-9. [PMID: 16935776] [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: 05/11/2023]
Abstract
Studying the molecular stratification of breast carcinoma is a real challenge considering the extreme heterogeneity of these tumors. Many patients are now treated following recommendation established at several NIH and St Gallen consensus conferences. However a significant fraction of these breast cancer patients do not need adjuvant chemotherapies while other patients receive inefficacious therapies. High density gene expression arrays have been designed to attempt to establish expression profiles that could be used as prognostic indicators or as predictive markers for response to treatment. This review is intended to discuss the potential value of these new indicators, but also the current weaknesses of these new genomic and bioinformatic approaches. The combined analysis of transcriptomic and genomic alteration data from relatively large numbers of well annotated tumor specimens may offer an opportunity to overcome the current difficulties in validating recently published non overlapping gene lists as prognostic or therapeutic indicators. There is also hope for identifying and deciphering signal transduction pathways driving tumor progression with newly developed algorithms and semi quantitative parameters obtained in simplified in vitro or in vivo models for specific transduction pathways.
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MESH Headings
- Animals
- Antineoplastic Agents/therapeutic use
- Breast Neoplasms/classification
- Breast Neoplasms/drug therapy
- Breast Neoplasms/genetics
- Breast Neoplasms/pathology
- Carcinoma, Ductal, Breast/classification
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Intraductal, Noninfiltrating/classification
- Carcinoma, Intraductal, Noninfiltrating/pathology
- Female
- Gene Expression Profiling
- Humans
- Mice
- Mice, Transgenic
- Models, Animal
- Mutation/genetics
- Neoplasm Metastasis
- Neoplasm Staging
- Neoplastic Stem Cells/pathology
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Affiliation(s)
- J-P Thiery
- Institut Curie, 26, rue d'Ulm, 75248 Paris Cedex 05.
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Strair R, Gharibo M, Taber BS K, Kuriyan M, Dipaola R, Stein M, Todd M, Rubin A, Lattime E, Medina D. Anti-tumor activity of partially HLA-matched irradiated blood mononuclear cells in patients with advanced malignancies. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.2552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
2552 Background: We previously demonstrated the safety and efficacy of HLA-haploidentical blood mononuclear cells (MNCs) administered in the absence of preparative therapy to patients with metastatic renal cell carcinoma (RCC) (J Clin Oncol 21:3785–91.2003). The efficacy of this therapy is evaluated further in patients with advanced malignancies. Methods: Patients with advanced malignancies who had HLA- haploidentical donors were enrolled. Donors underwent 12–15 L leukapheresis. MNCs were processed by irradiation (25 Gy) and immediately infused. Disease evaluation was undertaken every 8 weeks. Repeat infusions were given every 8 weeks until disease progression. Results: 30 patients with diverse diagnoses, including 9 patients with a hematological malignancy were treated. Three of 13 patients with RCC had disease response, and 1 of 2 patients with melanoma had a mixed response. A patient with imatinib mesylate-refractory chronic myelogenous leukemia (CML) had a transient response. A patient with refractory acute myelogenous leukemia (AML) had disease response in conjunction with therapy. Treatment was associated with minimal toxicity and radiographic responses in patients with RCC did not occur until after 2–3 treatments. Host CD8+ cells reactive with the Pr-1 peptide of proteinase 3 were induced in association with disease response in a patient with AML. Additional studies identifying disease targets and mechanisms by which infusion of irradiated HLA-haploidentical cells are associated with disease response are ongoing. Conclusions: Disease response is seen with irradiated allogeneic MNCs administered outside the context of hematopoietic stem-cell transplantation. Evidence for anti-tumor activity is seen in isolated patients with RCC, melanoma, CML and AML. The temporal nature of the response in RCC in combination with the very limited survival of the infused cells raises the possibility of induction of a host-mediated anti-tumor effect. This hypothesis is supported by induction of host CD8+ T cells reactive with a tumor-associated peptide in a patient with AML. Given the lack of toxicity, broad availability of related haploidentical donors and the relative low financial cost, this form of cellular therapy should be developed further. No significant financial relationships to disclose.
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Affiliation(s)
- R. Strair
- Cancer Institute of New Jersey, New Brunswick, NJ
| | - M. Gharibo
- Cancer Institute of New Jersey, New Brunswick, NJ
| | - K. Taber BS
- Cancer Institute of New Jersey, New Brunswick, NJ
| | - M. Kuriyan
- Cancer Institute of New Jersey, New Brunswick, NJ
| | - R. Dipaola
- Cancer Institute of New Jersey, New Brunswick, NJ
| | - M. Stein
- Cancer Institute of New Jersey, New Brunswick, NJ
| | - M. Todd
- Cancer Institute of New Jersey, New Brunswick, NJ
| | - A. Rubin
- Cancer Institute of New Jersey, New Brunswick, NJ
| | - E. Lattime
- Cancer Institute of New Jersey, New Brunswick, NJ
| | - D. Medina
- Cancer Institute of New Jersey, New Brunswick, NJ
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Abstract
Emerging data suggest that p21-activated kinase 1 (Pak1), a downstream signaling molecule of the small GTPases, growth factors, and lipid signaling, is upregulated or hyperactivated in human breast cancer. Until now, however, no direct causative role had been found for Pak1 in mammary tumor formation. We therefore sought to identify the role that Pak1 plays in mammary gland tumorigenesis. Our results showed that in a transgenic mouse model, overexpression of catalytically active Pak1 leads to the development of malignant mammary tumors and to a variety of other breast lesions, including focal solid nodules, ductal hyperplasia, and mini-intraductal neoplasm and adenoma. We also found that Pak1 hyperactivation increases the stimulation of downstream proliferative signaling effectors MEK1/2 and p38-MAPK in mammary tumor epithelial cells. Moreover, in our study, we detected expression of estrogen receptor-alpha expression and progesterone receptor expression during early stages of the lesions, but their expression was lost during the cells' transition to malignant invasive tumors. Finally, we found that consistent with a role in breast tumor progression, Pak1 expression and its nuclear accumulation was increased progressively during the transition from ductal hyperplasia to ductal carcinoma in situ to adenocarcinoma in widely used multistep polyoma-middle T-antigen transgenic mice. Together, these findings provide the first direct evidence that Pak1 deregulation may be sufficient for the formation of mammary gland tumors.
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MESH Headings
- Animals
- Antigens, Polyomavirus Transforming/physiology
- Disease Models, Animal
- Disease Progression
- Enzyme Activation
- Estrogen Receptor alpha/metabolism
- Humans
- MAP Kinase Kinase 1/metabolism
- MAP Kinase Kinase 2/metabolism
- Mammary Glands, Animal/enzymology
- Mammary Glands, Animal/pathology
- Mammary Neoplasms, Animal/enzymology
- Mammary Neoplasms, Animal/etiology
- Mammary Neoplasms, Animal/pathology
- Mice
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Mice, Transgenic
- Protein Serine-Threonine Kinases/metabolism
- Receptors, Progesterone/metabolism
- Up-Regulation
- p21-Activated Kinases
- p38 Mitogen-Activated Protein Kinases/metabolism
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Affiliation(s)
- R-A Wang
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, 77030, USA
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Medina D, DeToledo-Morrell L, Urresta F, Gabrieli JDE, Moseley M, Fleischman D, Bennett DA, Leurgans S, Turner DA, Stebbins GT. White matter changes in mild cognitive impairment and AD: A diffusion tensor imaging study. Neurobiol Aging 2006; 27:663-72. [PMID: 16005548 DOI: 10.1016/j.neurobiolaging.2005.03.026] [Citation(s) in RCA: 331] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2004] [Revised: 08/02/2004] [Accepted: 03/30/2005] [Indexed: 10/25/2022]
Abstract
Diffusion tensor imaging (DTI) can detect, in vivo, the directionality of molecular diffusion and estimate the microstructural integrity of white matter (WM) tracts. In this study, we examined WM changes in patients with Alzheimer's disease (AD) and in subjects with amnestic mild cognitive impairment (MCI) who are at greater risk for developing AD. A DTI index of WM integrity, fractional anisotropy (FA), was calculated in 14 patients with probable mild AD, 14 participants with MCI and 21 elderly healthy controls (NC). Voxel-by-voxel comparisons showed significant regional reductions of FA in participants with MCI and AD compared to controls in multiple posterior white matter regions. Moreover, there was substantial overlap of locations of regional decrease in FA in the MCI and AD groups. These data demonstrate that white matter changes occur in MCI, prior to the development of dementia.
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Affiliation(s)
- David Medina
- Department of Neurological Sciences, Rush University Medical Center, 1725 W. Harrison, Suite 309, Chicago, IL 60612, USA
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Ettiene G, Ortega S, Sepúlveda J, Medina D, Buscema I, Sandoval L. Dissipation of organophosphorus pesticides in green onion (Allium fistulosum L), cultivated in forced system called "barbacoas". Bull Environ Contam Toxicol 2006; 76:415-21. [PMID: 16652254 DOI: 10.1007/s00128-006-0937-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2003] [Accepted: 12/27/2005] [Indexed: 05/08/2023]
Affiliation(s)
- G Ettiene
- Chemistry Department, Agronomy Faculty, Zulia University, Post Office Box 15202, Maracaibo, Venezuela
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49
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Medina D. Mammary development fate and breast cancer risk. Breast Cancer Res 2005. [PMCID: PMC4233535 DOI: 10.1186/bcr1114] [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: 12/05/2022] Open
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Lee S, Wu Y, Mohsin SK, Medina D, Allred DC. Biological features and xenograft models of a very early human premalignant breast lesion. Breast Cancer Res 2005. [PMCID: PMC4233482 DOI: 10.1186/bcr1061] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- S Lee
- Breast Center, Baylor College of Medicine, Houston, Texas, USA
| | - Y Wu
- Breast Center, Baylor College of Medicine, Houston, Texas, USA
| | - SK Mohsin
- Breast Center, Baylor College of Medicine, Houston, Texas, USA
| | - D Medina
- Breast Center, Baylor College of Medicine, Houston, Texas, USA
| | - DC Allred
- Breast Center, Baylor College of Medicine, Houston, Texas, USA
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