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  1. Article: Health disparities in outcomes of pediatric systemic lupus erythematosus.

    Vara, Emily / Gilbert, Mileka / Ruth, Natasha M

    Frontiers in pediatrics

    2022  Volume 10, Page(s) 879208

    Abstract: Healthcare disparities exist throughout the United States, and disparities in healthcare delivery are responsible for a substantial portion of preventable morbidity and mortality. SLE disproportionately affects racial and ethnic minoritized groups, ... ...

    Abstract Healthcare disparities exist throughout the United States, and disparities in healthcare delivery are responsible for a substantial portion of preventable morbidity and mortality. SLE disproportionately affects racial and ethnic minoritized groups, including Blacks, Hispanics, and Asians/Pacific Islanders. Specifically, Black females have a 3 to 4-fold increased risk of developing SLE than White females. Population studies funded through the Centers for Disease Control have examined variations in disease outcomes among the different populations around the United States. For example, studies have shown that lupus nephritis, anti-phospholipid syndrome, and thrombocytopenia are more likely to affect racial and ethnic minorities than Whites. In addition, the Center for Disease Control WONDER (Wide-ranging Online Data for Epidemiologic Research) database found SLE was the seventh leading cause of death for all women aged 15-25 years and the fifth leading cause of death for African American and Hispanic females. From these studies, we know SLE primarily affects racial and ethnic minorities, but we do not know why these groups are at increased risk of developing the disease or have worse outcomes. By examining the underlying mechanisms of health disparities within our patient populations and mitigation strategies, we will further understand and provide better treatment for our patients. This review will discuss current research related to health disparities and health outcomes in childhood-onset SLE (cSLE).
    Language English
    Publishing date 2022-10-14
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2711999-3
    ISSN 2296-2360
    ISSN 2296-2360
    DOI 10.3389/fped.2022.879208
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Pulmonary manifestations of childhood-onset primary Sjogren's syndrome (SS) masquerading as reactive airways disease in a male patient and review of interstitial lung disease associated with SS.

    Bartholomeo, Adam / Aujla, Shean / Eklund, Meryle / Kerrigan, Cheryl / Riemer, Ellen / Gilbert, Mileka

    Pediatric rheumatology online journal

    2022  Volume 20, Issue 1, Page(s) 101

    Abstract: Background: Sjogren's syndrome (SS) is a rare chronic autoimmune disease involving exocrine glands presenting with sicca syndrome, recurrent parotitis and other extraglandular stigmata. SS is well characterized in the adult population with ... ...

    Abstract Background: Sjogren's syndrome (SS) is a rare chronic autoimmune disease involving exocrine glands presenting with sicca syndrome, recurrent parotitis and other extraglandular stigmata. SS is well characterized in the adult population with classification criteria; however, primary SS presenting in childhood is poorly defined and rare in males. Recurrent parotitis is the most common presenting symptom in children with primary SS; however, clinical phenotype in children appears more variable than in adults. The lungs are a common extraglandular location for manifestations of primary SS. However, interstitial lung disease (ILD) is rare in children with primary SS. There are only four published reports of ILD associated with primary SS in female children. Here, we present a very rare case of primary SS in a pediatric male with pulmonary manifestations and review of the literature on ILD in childhood-onset primary SS.
    Case presentation: A 14-year-old White male with a history of chronic severe asthma, recurrent parotitis and idiopathic intracranial hypertension was referred to pediatric rheumatology for evaluation of a positive ANA. In early childhood, he was diagnosed with persistent asthma recalcitrant to therapy. At age 8, he developed recurrent episodes of bilateral parotitis despite multiple treatments with sialoendoscopy. At age 14, respiratory symptoms significantly worsened prompting reevaluation. Lab workup was notable for positive ANA and Sjogren's Syndrome A and B antibodies. Pulmonary function tests showed only a mild obstructive process. Computed tomography of chest was significant for small airway disease, and lung biopsy was positive for mild interstitial lymphocytic inflammation presenting a conflicting picture for ILD. The constellation of findings led to the diagnosis of primary SS with associated pulmonary manifestations. He was treated with hydroxychloroquine, mycophenolate mofetil and oral corticosteroids with resolution of symptoms.
    Conclusions: Primary SS is a rare disease in the pediatric population that is poorly characterized. This case is the very rare presentation of childhood-onset primary SS with pulmonary manifestations in a male patient. ILD associated with primary SS is also very rare with only four pediatric patients reported in the literature. Collaborative effort is needed to develop pediatric specific diagnostic and treatment guidelines in this rare condition.
    MeSH term(s) Male ; Child ; Child, Preschool ; Female ; Humans ; Sjogren's Syndrome/complications ; Sjogren's Syndrome/diagnosis ; Parotitis/complications ; Lung Diseases, Interstitial/diagnosis ; Lung Diseases, Interstitial/etiology ; Lung/diagnostic imaging ; Asthma ; Rare Diseases
    Language English
    Publishing date 2022-11-16
    Publishing country England
    Document type Review ; Case Reports ; Journal Article
    ZDB-ID 2279468-2
    ISSN 1546-0096 ; 1546-0096
    ISSN (online) 1546-0096
    ISSN 1546-0096
    DOI 10.1186/s12969-022-00761-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Sarcoidosis presenting as bilateral lacrimal gland swelling: a pediatric case report.

    Powell, Margaret S / Cross, Ashley W / Tallo, Jared / Cheeseman, Edward W / Gilbert, Mileka R

    Pediatric rheumatology online journal

    2021  Volume 19, Issue 1, Page(s) 117

    Abstract: Background: To describe a case of pediatric sarcoidosis which initially presented as papillary conjunctivitis before manifesting as bilateral lacrimal gland swelling without other known systemic involvement.: Case presentation: A 10-year-old female ... ...

    Abstract Background: To describe a case of pediatric sarcoidosis which initially presented as papillary conjunctivitis before manifesting as bilateral lacrimal gland swelling without other known systemic involvement.
    Case presentation: A 10-year-old female presented to the pediatric ophthalmology clinic with complaints of bilateral eyelid swelling, tearing and itching for approximately 1 month. Her history and exam were most consistent with allergic conjunctivitis, for which she was started on a standard topical regimen. Despite initial improvement, she re-presented with significantly worsened eyelid swelling and minimal allergic symptoms. Enlargement of the lacrimal glands were palpable at this time. Lacrimal gland biopsy was obtained which demonstrated noncaseating granulomas. Systemic workup did not reveal evidence of disease involvement elsewhere.
    Conclusions: Sarcoidosis in the pediatric population may present in a myriad of ways and is well-known to mimic other disease entities. We present a case of pediatric sarcoidosis which presented initially as papillary conjunctivitis before manifesting as bilateral lacrimal gland swelling without systemic involvement.
    MeSH term(s) Child ; Edema/etiology ; Female ; Humans ; Lacrimal Apparatus Diseases/etiology ; Sarcoidosis/complications ; Sarcoidosis/diagnosis
    Language English
    Publishing date 2021-08-06
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 2279468-2
    ISSN 1546-0096 ; 1546-0096
    ISSN (online) 1546-0096
    ISSN 1546-0096
    DOI 10.1186/s12969-021-00606-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Blood gene expression profiling in pediatric systemic lupus erythematosus and systemic juvenile idiopathic arthritis: from bench to bedside.

    Gilbert, Mileka / Punaro, Marilynn

    Pediatric rheumatology online journal

    2014  Volume 12, Page(s) 16

    Abstract: Blood gene expression profiling has led to major advances in the field of rheumatology over the last few decades. Specifically, DNA microarray technology has been integral in increasing our knowledge of key players in the pathogenesis of some rare ... ...

    Abstract Blood gene expression profiling has led to major advances in the field of rheumatology over the last few decades. Specifically, DNA microarray technology has been integral in increasing our knowledge of key players in the pathogenesis of some rare pediatric rheumatic diseases. Our group, using microarray analysis, identified the interferon (IFN) gene signature in pediatric systemic lupus erythematosus (SLE) and has published data that suggest high doses of intravenous corticosteroid treatment may have benefit over strictly oral regimens. Additionally, DNA microarray technology led to our discovery that the interleukin (IL)-1 gene signature is associated with systemic juvenile idiopathic arthritis (sJIA) and to the use of IL-1 blockade with anakinra in this disease. We also reported the biologic rationale for use of anakinra early in the disease course. Anakinra is now being used as first-line treatment in sJIA in multiple centers. Herein, we review how information obtained from blood gene expression profiling has changed our clinical practice.
    MeSH term(s) Antirheumatic Agents/therapeutic use ; Arthritis, Juvenile/drug therapy ; Arthritis, Juvenile/genetics ; Child ; Gene Expression Profiling ; Genome-Wide Association Study ; Humans ; Interferons/genetics ; Interleukin 1 Receptor Antagonist Protein/therapeutic use ; Interleukin-1/genetics ; Lupus Erythematosus, Systemic/drug therapy ; Lupus Erythematosus, Systemic/genetics ; Translational Medical Research
    Chemical Substances Antirheumatic Agents ; Interleukin 1 Receptor Antagonist Protein ; Interleukin-1 ; Interferons (9008-11-1)
    Language English
    Publishing date 2014-05-08
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2279468-2
    ISSN 1546-0096
    ISSN 1546-0096
    DOI 10.1186/1546-0096-12-16
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Improving Health Equity in Rheumatology Through Workforce Diversification and Support for Health Equity Research and Education.

    Vassileva, Maria T / Suresh, Vandana / Chan, Andrew C / Akinsete, Alisha Valdez / Blanco, Irene / Blazer, Ashira / Criscione-Schreiber, Lisa / Dowell, Sharon / Feldman, Candace H / FitzGerald, John / Gilbert, Mileka / Hughes, Grant / Husni, M Elaine / Kerr, Gail / Kwan, Olivia / Mantilla, Bryanna / Nilson, Susanne / Rivadeneira, Alfredo Carlos / Rodríguez, Martha /
    Smith, Benjamin J / Soulsby, William Daniel / Wong, Stephen Chee-Yung / Yazdany, Jinoos / Ross, Will

    Arthritis & rheumatology (Hoboken, N.J.)

    2024  

    Language English
    Publishing date 2024-01-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2756371-6
    ISSN 2326-5205 ; 2326-5191
    ISSN (online) 2326-5205
    ISSN 2326-5191
    DOI 10.1002/art.42804
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Thesis ; Online: Dendritic cell and macrophage-mediated tolerance in lupus-prone mice

    Gilbert, Mileka Richelle

    2007  

    Abstract: During infection, immune cells respond to polyclonal activators, like bacterial and viral antigens, through innate immune responses. Therefore, mechanisms to regulate the activation of autoreactive B cells during polyclonal activation are necessary to ... ...

    Abstract During infection, immune cells respond to polyclonal activators, like bacterial and viral antigens, through innate immune responses. Therefore, mechanisms to regulate the activation of autoreactive B cells during polyclonal activation are necessary to prevent autoimmunity. Previous studies into the mechanisms of B cell tolerance have focused on B cell Receptor (BCR)-mediated regulation of autoreactive or chronically antigen-experienced B cells. However, the regulation of chronically antigen-experienced B cells during polyclonal activation is less understood. We recently identified a novel mechanism of tolerance wherein DCs and MΦs repress Ig secretion by autoreactive B cells. Polyclonal activators through Toll-like Receptors (TLRs) induce DCs and MΦs to secrete soluble factors (IL-6, sCD40L, and TNFα) that differentially regulate naïve and chronically antigen-experienced B cells. IL-6, sCD40L, and TNFα selectively repress chronically stimulated autoreactive B cells while having no effect on naïve B cells. Thus, we have identified a mechanism that prevents autoimmunity while allowing naïve B cells to respond during innate immune responses. Significantly, TLR-activated DCs and MΦs from lupus-prone mice are defective in repressing autoreactive B cells, coincident with defects in IL-6, sCD40L, and TNFα secretion. This could allow autoreactive B cells to secrete autoantibodies during innate immune responses, promoting autoimmune disease in lupus-prone mice. Determining the TLR defect in DCs and MΦs from lupus-prone mice could identify a genetic signature for individuals susceptible to lupus disease.
    Keywords Immunology
    Subject code 570
    Language ENG
    Publishing date 2007-01-01 00:00:01.0
    Publisher The University of North Carolina at Chapel Hill
    Publishing country us
    Document type Thesis ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Differences in rituximab use between pediatric rheumatologists and nephrologists for the treatment of refractory lupus nephritis and renal flare in childhood-onset SLE.

    Gilbert, Mileka / Goilav, Beatrice / Hsu, Joyce J / Nietert, Paul J / Meidan, Esra / Chua, Annabelle / Ardoin, Stacy P / Wenderfer, Scott E / von Scheven, Emily / Ruth, Natasha M

    Pediatric rheumatology online journal

    2021  Volume 19, Issue 1, Page(s) 137

    Abstract: Background: Consensus treatment plans have been developed for induction therapy of newly diagnosed proliferative lupus nephritis (LN) in childhood-onset systemic lupus erythematosus. However, patients who do not respond to initial therapy, or who ... ...

    Abstract Background: Consensus treatment plans have been developed for induction therapy of newly diagnosed proliferative lupus nephritis (LN) in childhood-onset systemic lupus erythematosus. However, patients who do not respond to initial therapy, or who develop renal flare after remission, warrant escalation of treatment. Our objective was to assess current practices of pediatric nephrologists and rheumatologists in North America in treatment of refractory proliferative LN and flare.
    Methods: Members of Childhood Arthritis and Rheumatology Research Alliance (CARRA) and the American Society for Pediatric Nephrology (ASPN) were surveyed in November 2015 to assess therapy choices (other than modifying steroid dosing) and level of agreement between rheumatologists and nephrologists for proliferative LN patients. Two cases were presented: (1) refractory disease after induction treatment with corticosteroid and cyclophosphamide (CYC) and (2) nephritis flare after initial response to treatment. Survey respondents chose treatments for three follow up scenarios for each case that varied by severity of presentation. Treatment options included CYC, mycophenolate mofetil (MMF), rituximab (RTX), and others, alone or in combination.
    Results: Seventy-six respondents from ASPN and foty-one respondents from CARRA represented approximately 15 % of the eligible members from each organization. Treatment choices between nephrologists and rheumatologists were highly variable and received greater than 50 % agreement for an individual treatment choice in only the following 2 of 6 follow up scenarios: 59 % of nephrologists, but only 38 % of rheumatologists, chose increasing dose of MMF in the case of LN refractory to induction therapy with proteinuria, hematuria, and improved serum creatinine. In a follow up scenario showing severe renal flare after achieving remission with induction therapy, 58 % of rheumatologists chose CYC and RTX combination therapy, whereas the top choice for nephrologists (43 %) was CYC alone. Rheumatologists in comparison to nephrologists chose more therapy options that contained RTX in all follow up scenarios except one (p < 0.05).
    Conclusions: Therapy choices for pediatric rheumatologists and nephrologists in the treatment of refractory LN or LN flare were highly variable with rheumatologists more often choosing rituximab. Further investigation is necessary to delineate the reasons behind this finding. This study highlights the importance of collaborative efforts in developing consensus treatment plans for pediatric LN.
    MeSH term(s) Antirheumatic Agents/administration & dosage ; Antirheumatic Agents/adverse effects ; Antirheumatic Agents/classification ; Attitude of Health Personnel ; Child ; Clinical Decision-Making ; Consensus ; Dose-Response Relationship, Immunologic ; Drug Therapy, Combination/methods ; Expert Testimony ; Humans ; Lupus Nephritis/drug therapy ; Lupus Nephritis/immunology ; Lupus Nephritis/physiopathology ; Lupus Nephritis/urine ; Medication Therapy Management ; Nephrologists ; Pediatricians ; Recurrence ; Remission Induction/methods ; Rheumatologists ; Rituximab/administration & dosage ; Rituximab/adverse effects ; Surveys and Questionnaires
    Chemical Substances Antirheumatic Agents ; Rituximab (4F4X42SYQ6)
    Language English
    Publishing date 2021-08-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 2279468-2
    ISSN 1546-0096 ; 1546-0096
    ISSN (online) 1546-0096
    ISSN 1546-0096
    DOI 10.1186/s12969-021-00627-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Pediatric Rheumatology Care and Outcomes Improvement Network's Quality Measure Set to Improve Care of Children With Juvenile Idiopathic Arthritis.

    Bingham, Catherine A / Harris, Julia G / Qiu, Tingting / Gilbert, Mileka / Vora, Sheetal S / Yildirim-Toruner, Cagri / Ferraro, Kerry / Lovell, Daniel J / Taylor, Janalee / Mannion, Melissa L / Weiss, Jennifer E / Laxer, Ronald M / Shishov, Michael / Oberle, Edward J / Gottlieb, Beth S / Lee, Tzielan C / Pan, Nancy / Burnham, Jon M / Fair, Danielle C /
    Batthish, Michelle / Hazen, Melissa M / Spencer, Charles H / Morgan, Esi M

    Arthritis care & research

    2023  Volume 75, Issue 12, Page(s) 2442–2452

    Abstract: Objective: To describe the selection, development, and implementation of quality measures (QMs) for juvenile idiopathic arthritis (JIA) by the Pediatric Rheumatology Care and Outcomes Improvement Network (PR-COIN), a multihospital learning health ... ...

    Abstract Objective: To describe the selection, development, and implementation of quality measures (QMs) for juvenile idiopathic arthritis (JIA) by the Pediatric Rheumatology Care and Outcomes Improvement Network (PR-COIN), a multihospital learning health network using quality improvement methods and leveraging QMs to drive improved outcomes across a JIA population since 2011.
    Methods: An American College of Rheumatology-endorsed multistakeholder process previously selected initial process QMs. Clinicians in PR-COIN and parents of children with JIA collaboratively selected outcome QMs. A committee of rheumatologists and data analysts developed operational definitions. QMs were programmed and validated using patient data. Measures are populated by registry data, and performance is displayed on automated statistical process control charts. PR-COIN centers use rapid-cycle quality improvement approaches to improve performance metrics. The QMs are revised for usefulness, to reflect best practices, and to support network initiatives.
    Results: The initial QM set included 13 process measures concerning standardized measurement of disease activity, collection of patient-reported outcome assessments, and clinical performance measures. Initial outcome measures were clinical inactive disease, low pain score, and optimal physical functioning. The revised QM set has 20 measures and includes additional measures of disease activity, data quality, and a balancing measure.
    Conclusion: PR-COIN has developed and tested JIA QMs to assess clinical performance and patient outcomes. The implementation of robust QMs is important to improve quality of care. PR-COIN's set of JIA QMs is the first comprehensive set of QMs used at the point-of-care for a large cohort of JIA patients in a variety of pediatric rheumatology practice settings.
    MeSH term(s) Humans ; Child ; Arthritis, Juvenile/therapy ; Arthritis, Juvenile/drug therapy ; Rheumatology/methods ; Antirheumatic Agents/therapeutic use ; Quality Indicators, Health Care ; Outcome Assessment, Health Care
    Chemical Substances Antirheumatic Agents
    Language English
    Publishing date 2023-07-13
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 645059-3
    ISSN 2151-4658 ; 0893-7524 ; 2151-464X
    ISSN (online) 2151-4658
    ISSN 0893-7524 ; 2151-464X
    DOI 10.1002/acr.25168
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Consensus Approach to a Treat-to-target Strategy in Juvenile Idiopathic Arthritis Care: Report From the 2020 PR-COIN Consensus Conference.

    El Tal, Tala / Ryan, Meghan E / Feldman, Brian M / Bingham, Catherine April / Burnham, Jon M / Batthish, Michelle / Bullock, Danielle / Ferraro, Kerry / Gilbert, Mileka / Gillispie-Taylor, Miriah / Gottlieb, Beth / Harris, Julia G / Hazen, Melissa / Laxer, Ronald M / Lee, Tzielan Chang / Lovell, Daniel / Mannion, Melissa / Noonan, Laura / Oberle, Edward /
    Taylor, Janalee / Weiss, Jennifer E / Toruner, Cagri Yildirim / Morgan, Esi M

    The Journal of rheumatology

    2022  Volume 49, Issue 5, Page(s) 497–503

    Abstract: Objective: Treat to target (T2T) is a strategy of adjusting treatment until a target is reached. An international task force recommended T2T for juvenile idiopathic arthritis (JIA) treatment. Implementing T2T in a standard and reliable way in clinical ... ...

    Abstract Objective: Treat to target (T2T) is a strategy of adjusting treatment until a target is reached. An international task force recommended T2T for juvenile idiopathic arthritis (JIA) treatment. Implementing T2T in a standard and reliable way in clinical practice requires agreement on critical elements of (1) target setting, (2) T2T strategy, (3) identifying barriers to implementation, and (4) patient eligibility. A consensus conference was held among Pediatric Rheumatology Care and Outcomes Improvement Network (PR-COIN) stakeholders to inform a statement of understanding regarding the PR-COIN approach to T2T.
    Methods: PR-COIN stakeholders including 16 healthcare providers and 4 parents were invited to form a voting panel. Using the nominal group technique, 2 rounds of voting were held to address the above 4 areas to select the top 10 responses by rank order.
    Results: Incorporation of patient goals ranked most important when setting a treatment target. Shared decision making (SDM), tracking measurable outcomes, and adjusting treatment to achieve goals were voted as the top elements of a T2T strategy. Workflow considerations, and provider buy-in were identified as key barriers to T2T implementation. Patients with JIA who had poor prognostic factors and were at risk for high disease burden were leading candidates for a T2T approach.
    Conclusion: This consensus conference identified the importance of incorporating patient goals as part of target setting and of the influence of patient stakeholder involvement in drafting treatment recommendations. The network approach to T2T will be modified to address the above findings, including solicitation of patient goals, optimizing SDM, and better workflow integration.
    MeSH term(s) Arthritis, Juvenile/drug therapy ; Child ; Consensus ; Cost of Illness ; Humans ; Patient Participation ; Rheumatology/methods
    Language English
    Publishing date 2022-02-01
    Publishing country Canada
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 194928-7
    ISSN 1499-2752 ; 0315-162X
    ISSN (online) 1499-2752
    ISSN 0315-162X
    DOI 10.3899/jrheum.210709
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: The green tea polyphenol, epigallocatechin-3-gallate, protects against the oxidative cellular and genotoxic damage of UVA radiation.

    Tobi, Simon E / Gilbert, Mileka / Paul, Nigel / McMillan, Trevor J

    International journal of cancer

    2002  Volume 102, Issue 5, Page(s) 439–444

    Abstract: A number of biological activities have been ascribed to the major green tea polyphenol epigallocatechin-3-gallate (EGCG) to explain its chemopreventive properties. Its antioxidant properties emerge as a potentially important mode of action. We have ... ...

    Abstract A number of biological activities have been ascribed to the major green tea polyphenol epigallocatechin-3-gallate (EGCG) to explain its chemopreventive properties. Its antioxidant properties emerge as a potentially important mode of action. We have examined the effect of EGCG treatment on the damaging oxidative effects of UVA radiation in a human keratinocyte line (HaCaT). Using the ROS-sensitive probes dihydrorhodamine 123 (DHR) and 2',7'-dichlorodihydrofluorescein diacetate (DCFH-DA), we detected a reduction in fluorescence in UVA-irradiated (100 kJ/m(2)) cells in the case of the former but not the latter probe after a 24-hr treatment with EGCG (e.g., 14%, [p < 0.05] after 10 microM EGCG). In the absence of UVA, however, both DHR and DCFH detected a pro-oxidant effect of EGCG at the highest concentration used of 50 microM. Measurements of DNA damage in UVA-exposed cells using the single cell gel electrophoresis assay (comet assay) also showed the protective effects of EGCG. A concentration of 10 microM EGCG decreased the level of DNA single strand breaks and alkali-labile sites to 62% of the level observed in non-EGCG, irradiated cells (p < 0.001) with a 5-fold higher concentration producing little further effect. Correspondingly, EGCG ablated the mutagenic effects of UVA (500 kJ/m(2)) reducing an induced hypoxanthine-guanine phosphoribosyl transferase (HPRT) mutant frequency of (3.39 +/- 0.73) x 10(-6) to spontaneous levels (1.09 +/- 0.19) x 10(-6). Despite having an antiproliferative effect in the absence of UVA, EGCG also served to protect against the cytotoxic effects of UVA radiation. Our data demonstrate the ability of EGCG to modify endpoints directly relevant to the carcinogenic process in skin.
    MeSH term(s) Antimutagenic Agents/pharmacology ; Antioxidants/pharmacology ; Catechin/analogs & derivatives ; Catechin/pharmacology ; Cell Survival/drug effects ; Cells, Cultured ; DNA Damage/drug effects ; Humans ; Keratinocytes/radiation effects ; Radiation-Protective Agents/pharmacology ; Ultraviolet Rays/adverse effects
    Chemical Substances Antimutagenic Agents ; Antioxidants ; Radiation-Protective Agents ; Catechin (8R1V1STN48) ; epigallocatechin gallate (BQM438CTEL)
    Language English
    Publishing date 2002-12-10
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S.
    ZDB-ID 218257-9
    ISSN 1097-0215 ; 0020-7136
    ISSN (online) 1097-0215
    ISSN 0020-7136
    DOI 10.1002/ijc.10730
    Database MEDical Literature Analysis and Retrieval System OnLINE

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