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Wong LYR, Odle A, Luhmann E, Wu DC, Wang Y, Teo QW, Ptak C, Sariol A, Lowery S, Mack M, Meyerholz DK, Wu NC, Radoshevich L, Perlman S. Contrasting roles of MERS-CoV and SARS-CoV-2 internal proteins in pathogenesis in mice. mBio 2023; 14:e0247623. [PMID: 37882568 PMCID: PMC10746224 DOI: 10.1128/mbio.02476-23] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 09/19/2023] [Indexed: 10/27/2023] Open
Abstract
Betacoronaviruses encode an internal (I) gene via an alternative reading frame within the nucleocapsid gene, called ORF8b for Middle-East respiratory syndrome coronavirus (MERS-CoV) and ORF9b for severe acute respiratory syndrome coronavirus (SARS-CoV) and SARS-CoV-2. Previous reports suggested that proteins 8b and 9b are involved in evading multiple innate immune signaling pathways. However, their roles in mediating pathogenesis in infected animals have not been determined. In this study, we abrogated the expression of protein 8b in MERS-CoV and protein 9b in SARS-CoV-2. Using mouse models of MERS-CoV and SARS-CoV-2 infection, we found that MERS-CoV lacking protein 8b expression was more virulent, while SARS-CoV-2 lacking protein 9b expression was attenuated compared with the respective wild-type viruses. Upon further analysis, we detected increased levels of type I interferon and enhanced infiltration of immune cells to the lungs of mice infected with MERS-CoV lacking protein 8b expression. These data suggest that the I protein of MERS-CoV plays a role in limiting pathogenesis while that of SARS-CoV-2 enhances disease severity. IMPORTANCE The function of betacoronavirus internal protein has been relatively understudied. The earliest report on the internal protein of mouse hepatitis virus suggested that the internal protein is a structural protein without significant functions in virus replication and virulence. However, the internal proteins of severe acute respiratory syndrome coronavirus (SARS-CoV), Middle-East respiratory syndrome coronavirus, and SARS-CoV-2 have been shown to evade immune responses. Despite the reported functions of the internal protein in these highly pathogenic human coronaviruses, its role in mediating pathogenesis in experimentally infected animals has not been characterized. Our data indicated that despite the similar genomic location and expression strategy of these internal proteins, their effects on virulence are vastly different and virus specific, highlighting the complexity between host-virus interaction and disease outcome.
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Affiliation(s)
- Lok-Yin Roy Wong
- Department of Microbiology, University of Iowa, Iowa City, Iowa, USA
- Department of Immunology, University of Iowa, Iowa City, Iowa, USA
| | - Abby Odle
- Department of Microbiology, University of Iowa, Iowa City, Iowa, USA
- Department of Immunology, University of Iowa, Iowa City, Iowa, USA
| | - Emma Luhmann
- Department of Microbiology, University of Iowa, Iowa City, Iowa, USA
- Department of Immunology, University of Iowa, Iowa City, Iowa, USA
| | - Douglas C. Wu
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Yiquan Wang
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Qi Wen Teo
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Celeste Ptak
- Department of Microbiology, University of Iowa, Iowa City, Iowa, USA
- Department of Immunology, University of Iowa, Iowa City, Iowa, USA
| | - Alan Sariol
- Department of Microbiology, University of Iowa, Iowa City, Iowa, USA
- Department of Immunology, University of Iowa, Iowa City, Iowa, USA
| | - Shea Lowery
- Department of Microbiology, University of Iowa, Iowa City, Iowa, USA
- Department of Immunology, University of Iowa, Iowa City, Iowa, USA
| | - Matthias Mack
- Department of Internal Medicine, University Hospital Regensburg, Regensburg, Germany
| | | | - Nicholas C. Wu
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Carle Illinois College of Medicine, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Lilliana Radoshevich
- Department of Microbiology, University of Iowa, Iowa City, Iowa, USA
- Department of Immunology, University of Iowa, Iowa City, Iowa, USA
| | - Stanley Perlman
- Department of Microbiology, University of Iowa, Iowa City, Iowa, USA
- Department of Immunology, University of Iowa, Iowa City, Iowa, USA
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, USA
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Goldman MP, Ishii L, Zubair R, Wu DC. How We Do It: Subcutaneous Sodium Deoxycholate Injections With or Without Triamcinolone for Reduction of Submental Fat. Dermatol Surg 2023; 49:903-906. [PMID: 37318154 DOI: 10.1097/dss.0000000000003856] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Affiliation(s)
- Mitchel P Goldman
- Cosmetic Laser Dermatology, A West Dermatology Company, San Diego, California
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Cui H, Diedrich JK, Wu DC, Lim JJ, Nottingham RM, Moresco JJ, Yates JR, Blencowe BJ, Lambowitz AM, Schimmel P. Publisher Correction: Arg-tRNA synthetase links inflammatory metabolism to RNA splicing and nuclear trafficking via SRRM2. Nat Cell Biol 2023:10.1038/s41556-023-01172-2. [PMID: 37237245 DOI: 10.1038/s41556-023-01172-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- Haissi Cui
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Jolene K Diedrich
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Douglas C Wu
- Institute for Cellular and Molecular Biology and Departments of Molecular Biosciences and Oncology, University of Texas at Austin, Austin, TX, USA
| | - Justin J Lim
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Ryan M Nottingham
- Institute for Cellular and Molecular Biology and Departments of Molecular Biosciences and Oncology, University of Texas at Austin, Austin, TX, USA
| | - James J Moresco
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
- Center for the Genetics of Host Defense, UT Southwestern Medical Center, Dallas, TX, USA
| | - John R Yates
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Benjamin J Blencowe
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Alan M Lambowitz
- Institute for Cellular and Molecular Biology and Departments of Molecular Biosciences and Oncology, University of Texas at Austin, Austin, TX, USA.
| | - Paul Schimmel
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA.
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Cui H, Diedrich JK, Wu DC, Lim JJ, Nottingham RM, Moresco JJ, Yates JR, Blencowe BJ, Lambowitz AM, Schimmel P. Arg-tRNA synthetase links inflammatory metabolism to RNA splicing and nuclear trafficking via SRRM2. Nat Cell Biol 2023; 25:592-603. [PMID: 37059883 DOI: 10.1038/s41556-023-01118-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 03/28/2022] [Accepted: 02/27/2023] [Indexed: 04/16/2023]
Abstract
Cells respond to perturbations such as inflammation by sensing changes in metabolite levels. Especially prominent is arginine, which has known connections to the inflammatory response. Aminoacyl-tRNA synthetases, enzymes that catalyse the first step of protein synthesis, can also mediate cell signalling. Here we show that depletion of arginine during inflammation decreased levels of nuclear-localized arginyl-tRNA synthetase (ArgRS). Surprisingly, we found that nuclear ArgRS interacts and co-localizes with serine/arginine repetitive matrix protein 2 (SRRM2), a spliceosomal and nuclear speckle protein, and that decreased levels of nuclear ArgRS correlated with changes in condensate-like nuclear trafficking of SRRM2 and splice-site usage in certain genes. These splice-site usage changes cumulated in the synthesis of different protein isoforms that altered cellular metabolism and peptide presentation to immune cells. Our findings uncover a mechanism whereby an aminoacyl-tRNA synthetase cognate to a key amino acid that is metabolically controlled during inflammation modulates the splicing machinery.
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Affiliation(s)
- Haissi Cui
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Jolene K Diedrich
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Douglas C Wu
- Institute for Cellular and Molecular Biology and Departments of Molecular Biosciences and Oncology, University of Texas at Austin, Austin, TX, USA
| | - Justin J Lim
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Ryan M Nottingham
- Institute for Cellular and Molecular Biology and Departments of Molecular Biosciences and Oncology, University of Texas at Austin, Austin, TX, USA
| | - James J Moresco
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
- Center for the Genetics of Host Defense, UT Southwestern Medical Center, Dallas, TX, USA
| | - John R Yates
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Benjamin J Blencowe
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Alan M Lambowitz
- Institute for Cellular and Molecular Biology and Departments of Molecular Biosciences and Oncology, University of Texas at Austin, Austin, TX, USA.
| | - Paul Schimmel
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA.
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Kern JA, Kollipara R, Hoss E, Boen M, Wu DC, Groff W, Goldman MP. Serious Adverse Events With Injectable Fillers: Retrospective Analysis of 7,659 Patient Outcomes. Dermatol Surg 2022; 48:551-555. [PMID: 35170541 DOI: 10.1097/dss.0000000000003409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND In total, 2.7 million injectable filler treatments were performed in 2019 in the United States. Although generally considered to be a safe treatment modality, adverse events may occur in rare situations. OBJECTIVE Analyze serious adverse events from injectable filler treatments, including infections, cutaneous necrosis, blindness, or delayed-onset nodule formation, spanning 11 years for 3 board-certified dermatologists and review their incidence, management, and outcomes. MATERIALS AND METHODS A retrospective analysis was performed of injectable filler treatments spanning 11 years at a multipractitioner outpatient clinic. Serious adverse events were identified, and treatment measures were documented. A literature search was performed to determine recent trends and outcomes for comparison. RESULTS Between January 2009 and August 2020, 18,013 mL of injectable filler was administered to 7,659 patients. Of the 18,013 mL administered, 74.1% comprised hyaluronic acid derivatives, 19.19% poly-l-lactic acid, and 6.71% calcium hydroxylapatite. Four serious adverse events were identified. Three events were delayed-onset skin nodule formation. One adverse event was related to vascular compromise and subsequent cutaneous necrosis. After appropriate treatment, all adverse events resolved without significant long-term sequelae. CONCLUSION Serious adverse events associated with injectable fillers, when performed by board-certified dermatologists, are extremely rare and can be successfully managed with appropriate treatment.
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Affiliation(s)
- Jessica A Kern
- University of California, San Diego School of Medicine, San Diego, California
| | | | - Elika Hoss
- Department of Dermatology, Mayo Clinic, Scottsdale, Arizona
| | - Monica Boen
- Cosmetic Laser Dermatology, A West Dermatology Company, San Diego, California
| | - Douglas C Wu
- Cosmetic Laser Dermatology, A West Dermatology Company, San Diego, California
| | - William Groff
- Cosmetic Laser Dermatology, A West Dermatology Company, San Diego, California
| | - Mitchel P Goldman
- Cosmetic Laser Dermatology, A West Dermatology Company, San Diego, California
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Boen M, Alhaddad M, Goldman MP, Kollipara R, Hoss E, Wu DC. A Randomized, Evaluator-Blind, Split-Face Study Evaluating the Safety and Efficacy of Calcium Hydroxylapatite for Jawline Augmentation. Dermatol Surg 2022; 48:76-81. [PMID: 33731569 DOI: 10.1097/dss.0000000000002582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
INTRODUCTION Jawline augmentation with calcium hydroxylapatite has not yet been evaluated in a prospective study with a split-face design. This study aims to perform the first randomized controlled, split-face study on the efficacy and safety of calcium hydroxylapatite for jawline augmentation using the needle and cannula technique. OBJECTIVE To perform the first randomized controlled, split-face study on the efficacy and safety of calcium hydroxylapatite for jawline augmentation using the needle and cannula technique. MATERIALS AND METHODS This is a single-site, randomized, evaluator-blind trial enrolling a total of 10 healthy subjects with at least Grade 1 (mild) on a 4-point Jawline Scale. One side of the face was randomized to receive 1 to 2 syringes of calcium hydroxylapatite with lidocaine (total of 3 mL) for correction of wrinkles and folds along the jawline using both the cannula and needle method, and a balancing treatment will be performed 1 month later. Blinded investigator and subject evaluations will be performed immediately after treatment and at the 30-, 60-, and 90-day visits. RESULTS Ten subjects were enrolled and completed the trial. There was a improvement in the degree of wrinkling and skin sagging in the 4-point Jawline Scale, with an average of a 1.3-point improvement in the scale on the day of treatment and at the Day 30 visit, which remained improved greater than baseline after 3 months as graded by blinded investigators. The Clinician Global Aesthetic Improvement Score for the treated side versus control, as assessed by blinded investigators, demonstrated a improvement with a 2.3-point improvement on the 5-point scale, and by the final visit on Day 90, most patients had a much improved appearance from baseline. CONCLUSION This study demonstrates that calcium hydroxylapatite is effective and safe for restoration and augmentation of the jawline using the unique needle and cannula technique.
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Affiliation(s)
- Monica Boen
- Cosmetic Laser Dermatology, San Diego, California
| | | | - Mitchel P Goldman
- Cosmetic Laser Dermatology, San Diego, California
- University of California, San Diego, California
| | | | - Elika Hoss
- Cosmetic Laser Dermatology, San Diego, California
| | - Douglas C Wu
- Cosmetic Laser Dermatology, San Diego, California
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Angra K, Lipp MB, Sekhon S, Wu DC, Goldman MP. Review of Post-laser-resurfacing Topical Agents for Improved Healing and Cosmesis. J Clin Aesthet Dermatol 2021; 14:24-32. [PMID: 34840654 PMCID: PMC8570656] [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] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
BACKGROUND Laser resurfacing produces a controlled skin injury, resulting in a wound healing response. This wound healing response allows for collagen remodeling, which improves skin texture and tone. Topical agents are often employed following laser treatments to facilitate recovery. The introduction of newer small-molecule technologies allow for improved recovery and cosmesis. OBJECTIVE We sought to perform a critical review of the safety and efficacy of newer small-molecule technologies employed following laser resurfacing. METHODS We performed a PubMed search of the generic name of the following topicals and included literature relevant to laser procedures, with an emphasis on laser resurfacing: thermal spring water, conjugated linolenic acid, vitamin C/vitamin E/ferulic acid serum, tripeptide/hexapeptide technology-containing products, growth factor serum and gel, recombinant human epidermal growth factor ointment and gel, red deer umbilical cord lining mesenchymal stem cell extract cream and serum, silicone-based gel, and microparticulate (1-3, 1-6 beta-glucan) gel. RESULTS Our search of the PubMed database yielded 62 results, out of which 17 clinical studies were included in this publication. The majority of aforementioned topicals show promise in terms of improving post-resurfacing recovery or cosmesis. CONCLUSION Clinical data regarding these agents is limited by the number and quality of studies. It is therefore challenging to propose a recommendation supporting any particular topical. We provide our own provider-specific post-laser resurfacing protocols to offer insight regarding new small-molecule technologies.
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Affiliation(s)
- Kunal Angra
- Drs. Angra, Lipp, Wu, and Goldman are with Cosmetic Laser Dermatology in San Diego, California
- Dr. Sekhon is with the Department of Dermatology at Howard University Hospital in Washington DC
| | - Michael B Lipp
- Drs. Angra, Lipp, Wu, and Goldman are with Cosmetic Laser Dermatology in San Diego, California
- Dr. Sekhon is with the Department of Dermatology at Howard University Hospital in Washington DC
| | - Sahil Sekhon
- Drs. Angra, Lipp, Wu, and Goldman are with Cosmetic Laser Dermatology in San Diego, California
- Dr. Sekhon is with the Department of Dermatology at Howard University Hospital in Washington DC
| | - Douglas C Wu
- Drs. Angra, Lipp, Wu, and Goldman are with Cosmetic Laser Dermatology in San Diego, California
- Dr. Sekhon is with the Department of Dermatology at Howard University Hospital in Washington DC
| | - Mitchel P Goldman
- Drs. Angra, Lipp, Wu, and Goldman are with Cosmetic Laser Dermatology in San Diego, California
- Dr. Sekhon is with the Department of Dermatology at Howard University Hospital in Washington DC
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Lamers MM, Mykytyn AZ, Breugem TI, Wang Y, Wu DC, Riesebosch S, van den Doel PB, Schipper D, Bestebroer T, Wu NC, Haagmans BL. Human airway cells prevent SARS-CoV-2 multibasic cleavage site cell culture adaptation. eLife 2021; 10:66815. [PMID: 33835028 PMCID: PMC8131099 DOI: 10.7554/elife.66815] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 04/08/2021] [Indexed: 12/13/2022] Open
Abstract
Virus propagation methods generally use transformed cell lines to grow viruses from clinical specimens, which may force viruses to rapidly adapt to cell culture conditions, a process facilitated by high viral mutation rates. Upon propagation in VeroE6 cells, SARS-CoV-2 may mutate or delete the multibasic cleavage site (MBCS) in the spike protein. Previously, we showed that the MBCS facilitates serine protease-mediated entry into human airway cells (Mykytyn et al., 2021). Here, we report that propagating SARS-CoV-2 on the human airway cell line Calu-3 – that expresses serine proteases – prevents cell culture adaptations in the MBCS and directly adjacent to the MBCS (S686G). Similar results were obtained using a human airway organoid-based culture system for SARS-CoV-2 propagation. Thus, in-depth knowledge on the biology of a virus can be used to establish methods to prevent cell culture adaptation.
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Affiliation(s)
- Mart M Lamers
- Viroscience Department, Erasmus Medical Center, Rotterdam, Netherlands
| | - Anna Z Mykytyn
- Viroscience Department, Erasmus Medical Center, Rotterdam, Netherlands
| | - Tim I Breugem
- Viroscience Department, Erasmus Medical Center, Rotterdam, Netherlands
| | - Yiquan Wang
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, United States
| | - Douglas C Wu
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, United States
| | - Samra Riesebosch
- Viroscience Department, Erasmus Medical Center, Rotterdam, Netherlands
| | | | - Debby Schipper
- Viroscience Department, Erasmus Medical Center, Rotterdam, Netherlands
| | - Theo Bestebroer
- Viroscience Department, Erasmus Medical Center, Rotterdam, Netherlands
| | - Nicholas C Wu
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, United States
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, United States
| | - Bart L Haagmans
- Viroscience Department, Erasmus Medical Center, Rotterdam, Netherlands
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Loh TY, Wu DC. Novel Application of the 730 and 785 nm Picosecond Titanium Sapphire Lasers for the Treatment of Nevus of Ota. Lasers Surg Med 2021; 53:1141-1145. [PMID: 33764565 DOI: 10.1002/lsm.23396] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 10/19/2020] [Revised: 01/13/2021] [Accepted: 02/12/2021] [Indexed: 11/11/2022]
Abstract
BACKGROUND AND OBJECTIVES Nevus of Ota is a benign dermal melanocytosis that may pose significant psychosocial distress to patients. Q-switched nanosecond lasers have traditionally been considered the first-line treatment but pain, bleeding, and postinflammatory pigmentary alteration are common adverse effects. Picosecond devices have been increasingly used to treat nevus of Ota with promising results. We present two cases demonstrating novel applications of the 730 and 785 nm picosecond titanium sapphire lasers for the treatment of nevus of Ota in two patients with types III and IV skin. STUDY DESIGN/MATERIALS AND METHODS A 730 and 785 nm picosecond titanium sapphire laser with pulse durations of 250 and 300 picoseconds, respectively, were used to treat two cases of nevus of Ota. Four to seven treatment sessions were conducted at monthly intervals, and follow-up evaluation was performed 1-3 months following the final treatment session. RESULTS Both cases demonstrated greater than 75% clearance following treatment. There were no adverse events or pigmentary alteration noted as a result of picosecond titanium sapphire laser treatment. CONCLUSIONS The 730 and 785 nm picosecond titanium sapphire lasers are safe and effective for the treatment of nevus of Ota. Lasers Surg. Med. 00:00-00, 2021. © 2021 Wiley Periodicals LLC.
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Affiliation(s)
- Tiffany Y Loh
- Division of Dermatology, University of Arizona, Tucson, Arizona, 72185
| | - Douglas C Wu
- Cosmetic Laser Dermatology, San Diego, California, 92121
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Lipp MB, Angra K, Wu DC, Goldman MP. Intense Pulsed Light: A Methodical Approach to Understanding Clinical Endpoints. J Drugs Dermatol 2021; 20:203-207. [PMID: 33538557 DOI: 10.36849/jdd.5638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Intense Pulsed Light (IPL) is a non-coherent polychromatic broadband filtered flashlamp that emits light in the spectrum of approximately 400–1200 nm. Its effects on photorejuvenation are well documented. The goal of this study is to help practitioners better conceptualize and fine tune IPL device settings in order to produce the most effective and safest clinical outcome. MATERIALS/METHODS This was a prospective study testing several filters (515 nm; 560 nm; 590 nm and 530–650; 900–1200 nm vascular filter), fluences, pulse durations, and pulse numbers (ie, multiple sequence pulsing or MSP) with a new IPL system. RESULTS Post-procedure erythema response was more pronounced with increasing fluence, decreasing wavelength, fewer pulses and shorter pulse duration. The exception was the 515 nm filter with regard to pulse duration, which was observed to have a more pronounced response with longer pulse durations. The overall clinical outcome at the 4-week follow-up visit demonstrated greatest improvement in erythema and pigmentation using the 515 nm filter on a Fitzpatrick Skin Type III individual. CONCLUSION Greatest clinical endpoint response at 4-week follow-up was observed with more robust initial responses. This was most apparent at higher fluence levels and fewer pulse counts. However, when the IPL is pushed to aggressive parameters, there is risk of hypopigmentation and hair loss as seen in this case study. Skin type is an important consideration when using IPL and MSP adds to its safety profile. J Drugs Dermatol. 2021;20(2):203-207. doi:10.36849/JDD.5638.
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Wu DC. Successful Treatment of Scalp Micropigmentation With 1064 nm Picosecond Nd:YAG Laser. Lasers Surg Med 2020; 53:935-938. [PMID: 33289086 DOI: 10.1002/lsm.23364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 09/27/2020] [Revised: 11/06/2020] [Accepted: 11/11/2020] [Indexed: 11/11/2022]
Abstract
BACKGROUND AND OBJECTIVES Scalp micropigmentation (SMP) is a useful technique that applies permanent camouflage for hair loss and scarring. However, suboptimal outcomes necessitate removal. To date, there have been no reports of SMP removal with a picosecond laser. In this report, we demonstrate the safety and efficacy of 1064 nm picosecond neodymium yttrium aluminum garnet (Nd:YAG) laser for the removal of SMP. STUDY DESIGN/MATERIALS AND METHODS This was a case series of four patients who presented with undesirable SMP. Following induction of adequate cutaneous anesthesia, a 1064 nm picosecond Nd:YAG laser was applied to all surface areas with SMP. Post-operative care consisted of 1% dimethicone ointment applied twice daily to the affected areas for 3-7 days. Patients were evaluated after 3-4 weeks and additional treatment sessions were undertaken if necessary. RESULTS Clearance of SMP was achieved within 1-3 treatment sessions in all cases. There were no unexpected adverse events. CONCLUSION Picosecond Nd:YAG laser is an excellent treatment option for undesirable SMP. It is safe and effective and typically requires fewer treatment sessions than traditional tattoo removal. Lasers Surg. Med. © 2020 Wiley Periodicals LLC.
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Affiliation(s)
- Douglas C Wu
- Cosmetic Laser Dermatology, 9339 Genesee Avenue, Suite 300, San Diego, California, 92121
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Boen M, Alhaddad M, Wu DC, Goldman MP. A Prospective Double-blind, Placebo-controlled Clinical Trial Evaluating the Efficacy of a Novel Combination of Hyaluronic Acid Serum and Antioxidant Cream for Rejuvenation of the Aging Neck. J Clin Aesthet Dermatol 2020; 13:13-18. [PMID: 33282096 PMCID: PMC7716741] [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] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
BACKGROUND: The neck is one of the most common areas affected by the aging process. A novel two product combination system composed of a serum and cream with hyaluronic acid and multiple strong antioxidants were investigated to determine their efficacy and safety in neck rejuvenation. OBJECTIVE: The objective of this prospective, randomized, double-blind, placebo-controlled clinical trial was to assess the efficacy and safety of a novel serum containing fractionated hyaluronic acid, peptides, and antioxidants for photodamage of the neck. METHODS: This was an institutional review board (IRB)-approved, randomized, double blind, placebo-controlled clinical trial involving 31 healthy subjects with moderate-to-severe neck wrinkling corresponding to at least a Grade 2 in wrinkles and score of 4 in elastosis on the Fitzpatrick-Goldman Wrinkle Scale. Twenty subjects were randomized to receive the active cream and serum system, while 11 subjects were randomized to receive the vehicles alone in serum and cream format for a course of two months. RESULTS: Both active and placebo cream and serum showed improvement of wrinkles, laxity, pigmentation, erythema, dryness, and texture of the skin, and high patient satisfaction scores. Histology of one of the active serums and cream samples revealed improvement in the quality of papillary dermal collagen and increase in the number of elastic fibers in the upper dermis after treatment. CONCLUSION: Our prospective, randomized controlled trial showed that the novel serum and cream showed improvement in skin aging on the neck, was well-tolerated by patients, and had a high degree of patient satisfaction.
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Affiliation(s)
- Monica Boen
- All authors are with the Cosmetic Laser Dermatology in San Diego, California
| | - Marwan Alhaddad
- All authors are with the Cosmetic Laser Dermatology in San Diego, California
| | - Douglas C Wu
- All authors are with the Cosmetic Laser Dermatology in San Diego, California
| | - Mitchel P Goldman
- All authors are with the Cosmetic Laser Dermatology in San Diego, California
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Chen FR, Zheng LM, Wu DC, Gong HM, Cen H, Chen WC. [Regulatory relationship between lncRNA KCNQ1OT1 and miR-146a-3p in preeclampsia]. Zhonghua Fu Chan Ke Za Zhi 2020; 55:535-543. [PMID: 32854478 DOI: 10.3760/cma.j.cn112141-20200322-00246] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To observe the changes of the expression level of long non-coding RNA (lncRNA) KCNQ1OT1 and microRNA (miR)-146a-3p in placenta tissues of preeclampsia (PE) patients, as well as their effect and mechanism on the biological functions of trophoblast cells. Methods: A total of 45 cases of hospitalized PE patients in Hainan General Hospital from July 2017 to July 2018 were selected as the PE group, 55 normal pregnant women during the same period were chosed as the control group. The expression level of KCNQ1OT1 mRNA and miR-146a-3p in the placenta tissues between two groups were detected by using quantitative real time (qRT)-PCR. Pearson's test was furtherly analyzed the correlation between them. Human trophoblast cell line (HTR8/SVneo) were randomly divided into control and lipopolysaccharide (LPS) groups, and then LPS group were divide into four sub-groups,included LPS group, short hairpin RNA (sh)-KCNQ1OT1 (after silencing the expression of KCNQ1OT1), miR-146a-3p inhibitor and sh-KCNQ1OT1+miR-146a-3p inhibitor. The targeting relationship between KCNQ1OT1 and miR-146a-3p were predicted by bioinformatics software and confirmed by luciferase assay. The cell proliferation and invasion capacities were respectively detected by cell counting kit-8 (CCK-8) and transwell assay. The expression level of KCNQ1OT1 mRNA and miR-146a-3p were detected by qRT-PCR and the protein expression level of CXC chemokine ligand 12 (CXCL12) and CXC chemokine receptor type 4 (CXCR4) were tested by western blot. Results: (1) The mRNA expression level of KCNQ1OT1 in the placenta of PE group was lower than that of control group (0.23±0.03 vs 0.51±0.04, P<0.05), and the miR-146a-3p expression level was higher than that of the control group (0.49±0.03 vs 0.31±0.03, P<0.05), there were statistical significant differences between the two groups. (2) Luciferase assay showed that there was a targeting relationship between KCNQ1OT1 and mir-146a-3p. Compared with the control group, the mRNA expression level of KCNQ1OT1 in the LPS group were significantly decreased (0.91±0.03 vs 0.35±0.03, P<0.05), and the expression level of miR-146a-3p were significantly increased (0.22±0.03 vs 0.63±0.04, P<0.05). The cell proliferation, invasion and migration capacities and the protein expression of CXCL12 and CXCR4 significantly reduced in the LPS group compared with control group (all P<0.05). The mRNA expression level of KCNQ1OT1 (0.23±0.03) in the sh-KCNQ1OT1 group were further decreased, the expression of miR-146a-3p (0.85±0.03) were further increased, and the cell proliferation, invasion and migration capacities and the protein expression of CXCL12 and CXCR4 were all further reduced compared with control group,there were significant difference between two groups (all P<0.05). Comparing the miR-146a-3p inhibitor group, and sh-KCNQ1OT1+miR-146a-3p inhibitor group with the sh-KCNQ1OT1 group, respectively, the expression level of KCNQ1OT1 mRNA (0.78±0.04 vs 0.50±0.03) increased, and the expression level of miR-146a-3p (0.42±0.03 vs 0.46±0.03) decreased, the cell proliferation, invasion and migration capacities and the protein expression of CXCL12 and CXCR4 were all increased ,there were statistically significant differences (all P<0.05). Conclusion: KCNQ1OT1 could target the regulation of miR-146a-3p through CXCL12/CXCR4 pathway in the proliferation, invasion an migration of HTR8/SVneo cells, which may be involved in the pathogenesis of PE.
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Yao J, Wu DC, Nottingham RM, Lambowitz AM. Identification of protein-protected mRNA fragments and structured excised intron RNAs in human plasma by TGIRT-seq peak calling. eLife 2020; 9:e60743. [PMID: 32876046 PMCID: PMC7518892 DOI: 10.7554/elife.60743] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 09/01/2020] [Indexed: 12/18/2022] Open
Abstract
Human plasma contains > 40,000 different coding and non-coding RNAs that are potential biomarkers for human diseases. Here, we used thermostable group II intron reverse transcriptase sequencing (TGIRT-seq) combined with peak calling to simultaneously profile all RNA biotypes in apheresis-prepared human plasma pooled from healthy individuals. Extending previous TGIRT-seq analysis, we found that human plasma contains largely fragmented mRNAs from > 19,000 protein-coding genes, abundant full-length, mature tRNAs and other structured small non-coding RNAs, and less abundant tRNA fragments and mature and pre-miRNAs. Many of the mRNA fragments identified by peak calling correspond to annotated protein-binding sites and/or have stable predicted secondary structures that could afford protection from plasma nucleases. Peak calling also identified novel repeat RNAs, miRNA-sized RNAs, and putatively structured intron RNAs of potential biological, evolutionary, and biomarker significance, including a family of full-length excised intron RNAs, subsets of which correspond to mirtron pre-miRNAs or agotrons.
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Affiliation(s)
- Jun Yao
- Institute for Cellular and Molecular Biology and Departments of Molecular Biosciences and Oncology, University of TexasAustinUnited States
| | - Douglas C Wu
- Institute for Cellular and Molecular Biology and Departments of Molecular Biosciences and Oncology, University of TexasAustinUnited States
| | - Ryan M Nottingham
- Institute for Cellular and Molecular Biology and Departments of Molecular Biosciences and Oncology, University of TexasAustinUnited States
| | - Alan M Lambowitz
- Institute for Cellular and Molecular Biology and Departments of Molecular Biosciences and Oncology, University of TexasAustinUnited States
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Lipp MB, Angra K, Wu DC. Safety and Efficacy of a Novel 730 nm Picosecond Titanium Sapphire Laser for the Treatment of Benign Pigmented Lesions. Lasers Surg Med 2020; 53:429-434. [PMID: 32869883 DOI: 10.1002/lsm.23314] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 08/03/2020] [Accepted: 08/13/2020] [Indexed: 11/08/2022]
Abstract
BACKGROUND AND OBJECTIVES Picosecond lasers in dermatology were originally focused on optimizing the removal of unwanted tattoos. Subsequent advances in this technology have expanded its clinical indications to include treatment of benign pigmented lesions, photodamage, melasma, and scar revision. In this retrospective review, we evaluate a novel 730 nm picosecond titanium sapphire laser in treating benign pigmented lesions. STUDY DESIGN/MATERIALS AND METHODS This is a retrospective review of all patients who presented to our institution between December 2019 and March 2020 for treatment of their benign pigmented lesions with a 730 nm picosecond titanium sapphire laser. All Fitzpatrick skin types (I-VI) were included. Absolute and relative evaluations were conducted by two blinded board-certified dermatologists using high-resolution photographic images. RESULTS Twenty-two of 64 patients satisfied inclusion and exclusion criteria. Patients received 1.1 ± 0.3 treatment sessions. The absolute average pigmentation score prior to treatment was 2.04 ± 0.7 versus 1.39 ± 0.6 after treatment (P < 0.05). Improvement in pigmentation was observed in 86% of the patients, while 3% had no improvement and 11% had worsening of pigmentation. No other adverse events were observed. Downtime consisted of 1-2 days of mild edema and erythema followed by 3-5 days of mild pigment darkening and superficial crust. CONCLUSION The novel 730 nm picosecond titanium sapphire laser is a safe and effective treatment for benign pigmented lesions. Future prospective randomized control studies would be beneficial to further clarify its role in the treatment of benign pigmentation. Lasers Surg. Med. © 2020 Wiley Periodicals LLC.
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Affiliation(s)
- Michael B Lipp
- Cosmetic Laser Dermatology, 9339 Genesee Avenue, Suite 300, San Diego, 92121, California
| | - Kunal Angra
- Cosmetic Laser Dermatology, 9339 Genesee Avenue, Suite 300, San Diego, 92121, California
| | - Douglas C Wu
- Cosmetic Laser Dermatology, 9339 Genesee Avenue, Suite 300, San Diego, 92121, California
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16
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Wu DC, Jones IT, Boen M, Al-Haddad M, Goldman MP. A Randomized, Split-Face, Double-Blind Comparison Trial Between Fractionated Frequency-Doubled 1064/532 nm Picosecond Nd:YAG Laser and Fractionated 1927 nm Thulium Fiber Laser for Facial Photorejuvenation. Lasers Surg Med 2020; 53:204-211. [PMID: 32285983 DOI: 10.1002/lsm.23248] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 01/28/2020] [Revised: 04/04/2020] [Accepted: 04/06/2020] [Indexed: 11/05/2022]
Abstract
BACKGROUND AND OBJECTIVE Fractionated lasers are a popular therapeutic option for facial photorejuvenation. In this study, we compare the safety, tolerability, and efficacy of a fractionated frequency-doubled 1064/532 nm picosecond Nd:YAG fractionated picosecond laser (FPL) versus a fractionated 1927 nm thulium fiber laser (TFL) for facial rejuvenation. STUDY DESIGN/MATERIALS AND METHODS This was a double-blind, randomized, split-face comparison study involving 20 subjects. Facial halves were randomized to receive either FPL or TFL treatment. Three treatments were delivered at 1-month intervals. Subjects were followed up for 1, 3, and 6 months post-final treatment session and evaluated by blinded, non-treating investigators for dyspigmentation, erythema, keratosis, texture, and rhytids on a standardized scale. Subjects also recorded a quantitative daily diary rating healing progress for 14 days after every treatment session. RESULTS Statistically significant improvements in elastosis, erythema, keratosis, dyschromia, and skin texture were noted in both treatment groups. There were no significant differences detected in clinical efficacy between the two groups. Subject daily dairies revealed statistically significant differences in tolerability during the immediate 14-day post-operative recovery period. The facial half treated with FPL displayed significantly less redness on days 3 and 4; significantly less swelling on day 5; significantly less crusting on days 1 through 9; significantly less peeling on days 3 through 9; and significantly less itch on days 4 and 7. There were no unexpected adverse effects observed. CONCLUSION Both FPL and TFL are safe and effective treatment options for facial rejuvenation. FPL may be associated with significantly less downtime. Lasers Surg. Med. © 2020 Wiley Periodicals, Inc.
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Affiliation(s)
- Douglas C Wu
- Cosmetic Laser Dermatology, San Diego, California, 92121
| | | | - Monica Boen
- Cosmetic Laser Dermatology, San Diego, California, 92121
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Wu DC, Goldman MP, Wat H, Chan HHL. A Systematic Review of Picosecond Laser in Dermatology: Evidence and Recommendations. Lasers Surg Med 2020; 53:9-49. [PMID: 32282094 DOI: 10.1002/lsm.23244] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 03/21/2020] [Accepted: 03/23/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND OBJECTIVES The use of picosecond laser in dermatology was originally focused on optimizing the removal of unwanted tattoos. Subsequent advances in this technology have broadened its clinical indications to include treatment of benign pigmented lesions, photodamage, melasma, and scar revision. In this systematic review, evidence-based recommendations are developed for the use of picosecond laser in dermatology. STUDY DESIGN/MATERIALS AND METHODS A comprehensive search of the English language literature was performed up to and including November 2019. Relevant citations were individually evaluated, synthesized, and categorized based on the Level of Evidence. With the addition of the authors' combined clinical experience, clinical recommendations were developed. RESULTS After application of inclusion and exclusion criteria, a total of 77 unique studies were evaluated. Treatment of benign pigmented lesions was associated with level I-IV evidence; rejuvenation was associated with level II evidence; melasma was associated with level II evidence; scar revision was associated with level II-III evidence; tattoo removal was associated with level I evidence. CONCLUSION Picosecond laser is a safe and effective treatment modality for an increasing range of dermatologic indications. Further development of this technology is warranted. Lasers Surg. Med. © 2020 Wiley Periodicals, Inc.
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Affiliation(s)
- Douglas C Wu
- Cosmetic Laser Dermatology, 9339 Genesee Avenue, Suite 300, San Diego, California, 92121
| | - Mitchel P Goldman
- Cosmetic Laser Dermatology, 9339 Genesee Avenue, Suite 300, San Diego, California, 92121
| | - Heidi Wat
- Wellman Center for Photomedicine, Massachusetts General Hospital, 50 Blossom Street, Boston, Massachusetts, 02114
| | - Henry H L Chan
- Wellman Center for Photomedicine, Massachusetts General Hospital, 50 Blossom Street, Boston, Massachusetts, 02114
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Guan W, Yang Z, Wu NC, Lee HHY, Li Y, Jiang W, Shen L, Wu DC, Chen R, Zhong N, Wilson IA, Peiris M, Mok CKP. Clinical Correlations of Transcriptional Profile in Patients Infected With Avian Influenza H7N9 Virus. J Infect Dis 2019; 218:1238-1248. [PMID: 29846612 PMCID: PMC6129114 DOI: 10.1093/infdis/jiy317] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 05/24/2018] [Indexed: 12/27/2022] Open
Abstract
Background Avian influenza A (H7N9) viruses emerged in China in 2013 and caused zoonotic disease associated with a case-fatality ratio of over 30%. Transcriptional profiles in peripheral blood reflect host responses and can help to elucidate disease pathogenesis. Methods We correlated serial blood transcriptomic profiles of patients with avian influenza A (H7N9) virus infection and determined the biological significances from the analysis. Results We found that specific gene expression profiles in the blood were strongly correlated with the Pao 2/Fio 2 ratio and viral load in the lower respiratory tract. Cell cycle and leukocyte-related immunity were activated at the acute stage of the infection while T-cell functions and various metabolic processes were associated with the recovery phase of the illness. A transition from systemic innate to adaptive immunity was found. Conclusions We developed a novel approach for transcriptomic analysis to identify key host responses that were strongly correlated with specific clinical and virologic parameters in patients with H7N9 infection.
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Affiliation(s)
- Wenda Guan
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University
| | - Zifeng Yang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University
| | - Nicholas C Wu
- Department of Integrative Structural and Computational Biology
| | - Horace H Y Lee
- Hong Kong University-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong
| | - Yimin Li
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University
| | - Wenxin Jiang
- Department of Emergency and Critical Care Medicine, Guangdong General Hospital, Guangdong Academy of Medical Sciences
| | | | - Douglas C Wu
- Institute for Cellular and Molecular Biology, University of Texas at Austin
| | - Rongchang Chen
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University
| | - Nanshan Zhong
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University
| | - Ian A Wilson
- Department of Integrative Structural and Computational Biology.,Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California
| | - Malik Peiris
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University.,Hong Kong University-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong
| | - Chris K P Mok
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University.,Hong Kong University-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong
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Chunharas C, Boen M, Alhaddad M, Wu DC. The Efficacy of Pulsed Dye Laser Pretreated With or Without Local Anesthetic on Patients Presenting With Erythema of Face, Neck, Chest, and Extremities. Lasers Surg Med 2019; 52:307-314. [PMID: 31441076 DOI: 10.1002/lsm.23146] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/22/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND OBJECTIVES Erythema is one of the most common cosmetic concerns and usually responds well to pulsed dye laser (PDL) treatment. As this laser can cause significant discomfort, topical anesthesia is sometimes offered. However, it is still uncertain whether topical anesthetics can affect the outcome of the laser therapy. We performed a retrospective single site study to compare the efficacy of PDL for the treatment of erythema in patients with and without pretreatment with topical anesthetic. STUDY DESIGN/MATERIALS AND METHODS A chart review was performed and patients who presented with erythema of face, neck, chest, and extremities pretreated with topical anesthesia (23% lidocaine/7% tetracaine ointment or 7% lidocaine/7% tetracaine ointment) undergoing PDL were reviewed and compared with another group without anesthesia. Two blinded dermatologists evaluated the postlaser procedure photographs and gave an assessment compared with baseline. RESULTS A total of 69 patient charts were reviewed. The erythema resulted from various skin conditions including telangiectasia, cherry angioma, striae, and rosacea. The mean improvement was 2.2581 in the anesthesia group and 2.2632 in the nonanesthesia group. There was no significant difference between both groups as confirmed by a noninferiority test. CONCLUSIONS Topical anesthesia with lidocaine and tetracaine ointment do not interfere with the efficacy of the PDL. Since pain management is essential for any cosmetic procedure, the application of a local anesthetic will enhance patient comfort and satisfaction during treatment with PDL. Lasers Surg. Med. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
| | - Monica Boen
- Cosmetic Laser Dermatology, 9339 Genesee Ave., Suite 300, San Diego, California, 92122
| | - Marwan Alhaddad
- Cosmetic Laser Dermatology, 9339 Genesee Ave., Suite 300, San Diego, California, 92122
| | - Douglas C Wu
- Cosmetic Laser Dermatology, 9339 Genesee Ave., Suite 300, San Diego, California, 92122
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Wu NC, Lv H, Thompson AJ, Wu DC, Ng WWS, Kadam RU, Lin CW, Nycholat CM, McBride R, Liang W, Paulson JC, Mok CKP, Wilson IA. Preventing an Antigenically Disruptive Mutation in Egg-Based H3N2 Seasonal Influenza Vaccines by Mutational Incompatibility. Cell Host Microbe 2019; 25:836-844.e5. [PMID: 31151913 PMCID: PMC6579542 DOI: 10.1016/j.chom.2019.04.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 04/01/2019] [Accepted: 04/26/2019] [Indexed: 12/23/2022]
Abstract
Egg-based seasonal influenza vaccines are the major preventive countermeasure against influenza virus. However, their effectiveness can be compromised when antigenic changes arise from egg-adaptive mutations on influenza hemagglutinin (HA). The L194P mutation is commonly observed in egg-based H3N2 vaccine seed strains and significantly alters HA antigenicity. An approach to prevent L194P would therefore be beneficial. We show that emergence of L194P during egg passaging can be impeded by preexistence of a G186V mutation, revealing strong incompatibility between these mutations. X-ray structures illustrate that individual G186V and L194P mutations have opposing effects on the HA receptor-binding site (RBS), and when both G186V and L194P are present, the RBS is severely disrupted. Importantly, wild-type HA antigenicity is maintained with G186V, but not L194P. Our results demonstrate that these epistatic interactions can be used to prevent the emergence of mutations that adversely alter antigenicity during egg adaptation. Most H3N2 egg isolates carry hemagglutinin mutation G186V or L194P, but not both Hemagglutinin double mutation G186V/L194P is highly deleterious to the virus Hemagglutinin double mutation G186V/L194P disrupts the receptor-binding site Wild-type hemagglutinin antigenicity is maintained in G186V, but not in L194P
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MESH Headings
- Adaptation, Biological
- Animals
- Antigens, Viral/chemistry
- Antigens, Viral/genetics
- Antigens, Viral/immunology
- Binding Sites
- Chick Embryo
- Crystallography, X-Ray
- Hemagglutinin Glycoproteins, Influenza Virus/chemistry
- Hemagglutinin Glycoproteins, Influenza Virus/genetics
- Hemagglutinin Glycoproteins, Influenza Virus/immunology
- Influenza A Virus, H3N2 Subtype/genetics
- Influenza A Virus, H3N2 Subtype/growth & development
- Influenza A Virus, H3N2 Subtype/immunology
- Influenza Vaccines/genetics
- Influenza Vaccines/immunology
- Mutation, Missense
- Protein Conformation
- Technology, Pharmaceutical/methods
- Virus Cultivation/methods
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Affiliation(s)
- Nicholas C Wu
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Huibin Lv
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China; State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, China
| | - Andrew J Thompson
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Douglas C Wu
- Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, TX 78712, USA; Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX 78712, USA
| | - Wilson W S Ng
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China; State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, China
| | - Rameshwar U Kadam
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Chih-Wei Lin
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Corwin M Nycholat
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Ryan McBride
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Weiwen Liang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, China
| | - James C Paulson
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA; Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Chris K P Mok
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China; State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, China.
| | - Ian A Wilson
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA; The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.
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Alhaddad M, Boen M, Wu DC, Goldman MP. Red Deer Umbilical Cord Lining Mesenchymal Stem Cell Extract Cream for Rejuvenation of the Face. J Drugs Dermatol 2019; 18:363-366. [PMID: 31012565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Background: Aging is a multifactorial process that involves all components of the skin. Both intrinsic and extrinsic forces play a role in this aging process. A new patented protein mix derived from red deer umbilical cord lining stem cell conditioned media (Calecim® Multi Action Cream, CellResearch Corporation, Singapore) has been developed to improve the signs of aging. The extract is the conditioned media from umbilical cord lining mesenchymal stem cell culture in basal media and consists of a mixture, in specific proportions, of cytokines, growth factors, extracellular matrix proteins, amino acids, peptides, and other proteins. It has been developed to increase epidermal cell turnover and stimulate fibroblast function, reducing the appearance of pigmentation, fine lines, and redness, and to restore skin elasticity. Objective: The objective of this IRB-approved, prospective, randomized, double-blind, split-face, placebo-controlled clinical trial was to compare the efficacy of red deer mesenchymal stem cell extract (RCE) versus vehicle for facial rejuvenation. Methods: The trial involved 40 healthy subjects with moderate to severe facial wrinkling secondary to photodamage. One half of the face was randomized to receive topical RCE cream and vehicle cream to the other half of the face. Treatment was continued for 3 months, and evaluations were performed in a double-blind fashion. Results: Both sides of the face achieved significant improvement. Blinded investigator assessments did not detect any statistically significant differences between the two halves of the face in terms of efficacy, safety, or tolerability. Subject evaluations demonstrated superiority of the active treatment side. Conclusion: Red deer umbilical cord lining mesenchymal stem cell extract was effective in rejuvenating the aging face as demonstrated by investigator and subject measures. J Drugs Dermatol. 2019;18(4):363-366.
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Wu DC, Yao J, Ho KS, Lambowitz AM, Wilke CO. Limitations of alignment-free tools in total RNA-seq quantification. BMC Genomics 2018; 19:510. [PMID: 29969991 PMCID: PMC6042521 DOI: 10.1186/s12864-018-4869-5] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [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: 01/11/2018] [Accepted: 06/14/2018] [Indexed: 11/11/2022] Open
Abstract
Background Alignment-free RNA quantification tools have significantly increased the speed of RNA-seq analysis. However, it is unclear whether these state-of-the-art RNA-seq analysis pipelines can quantify small RNAs as accurately as they do with long RNAs in the context of total RNA quantification. Result We comprehensively tested and compared four RNA-seq pipelines for accuracy of gene quantification and fold-change estimation. We used a novel total RNA benchmarking dataset in which small non-coding RNAs are highly represented along with other long RNAs. The four RNA-seq pipelines consisted of two commonly-used alignment-free pipelines and two variants of alignment-based pipelines. We found that all pipelines showed high accuracy for quantifying the expression of long and highly-abundant genes. However, alignment-free pipelines showed systematically poorer performance in quantifying lowly-abundant and small RNAs. Conclusion We have shown that alignment-free and traditional alignment-based quantification methods perform similarly for common gene targets, such as protein-coding genes. However, we have identified a potential pitfall in analyzing and quantifying lowly-expressed genes and small RNAs with alignment-free pipelines, especially when these small RNAs contain biological variations. Electronic supplementary material The online version of this article (10.1186/s12864-018-4869-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Douglas C Wu
- Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, 78712, TX, USA.,Department of Molecular Biosciences, The University of Texas at Austin, Austin, 78712, TX, USA
| | - Jun Yao
- Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, 78712, TX, USA.,Department of Molecular Biosciences, The University of Texas at Austin, Austin, 78712, TX, USA
| | - Kevin S Ho
- Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, 78712, TX, USA.,Department of Molecular Biosciences, The University of Texas at Austin, Austin, 78712, TX, USA
| | - Alan M Lambowitz
- Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, 78712, TX, USA.,Department of Molecular Biosciences, The University of Texas at Austin, Austin, 78712, TX, USA
| | - Claus O Wilke
- Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, 78712, TX, USA. .,Department of Integrative Biology, The University of Texas at Austin, Austin, 78712, TX, USA.
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Jones IT, Vanaman Wilson MJ, Guiha I, Wu DC, Goldman MP. A split-body study evaluating the efficacy of a conformable surface cryolipolysis applicator for the treatment of male pseudogynecomastia. Lasers Surg Med 2018; 50:608-612. [PMID: 29331032 DOI: 10.1002/lsm.22784] [Citation(s) in RCA: 4] [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] [Accepted: 12/10/2017] [Indexed: 02/28/2024]
Abstract
BACKGROUND Cryolipolysis is a non-invasive method of body shaping that has been used for male pseudogynecomastia. However, traditional vacuum suction cryolipolysis requires a minimum pinchable fat layer which may not always be present in this area. OBJECTIVE To evaluate the efficacy and safety of a conformable surface cryolipolysis applicator for the reduction of male pseudogynecomastia. MATERIALS AND METHODS Ten male subjects with pseudogynecomastia received two cycles of cryolipolysis to the breast 6 weeks apart. Ultrasound was used to measure the thickness of adipose tissue. RESULTS Seven of 10 patients completed the study. Compared to baseline, the mean ± SD change in adipose tissue thickness was 8.12 ± 6.94 mm for the treated versus 1.03 ± 6.03 mm for the control breast at week 6 (p = 0.014), and 8.71 ± 7.04 mm for the treated vs. 2.66 ± 7.04 mm for the control breast at week 12 (P = 0.16). Four (4) of seven (57%) patients were at least slightly satisfied with the treated breast, and although subject satisfaction was higher in the treated breast, this did not reach significance (0.085). Adverse events were mild and transient. CONCLUSION A conformable surface cryolipolysis applicator was effective in reducing the mean adipose tissue thickness in subjects with male pseudogynecomastia. Lasers Surg. Med. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Isabela T Jones
- McLean Dermatology and Skincare Center, 6849 Old Dominion Drive, Suite 300, McLean, Virginia, 22101
| | | | - Isabella Guiha
- Goldman, Butterwick, Groff, Fabi and Wu Cosmetic Laser Dermatology, A West Dermatology Company, 9339 Genesee Ave., Suite 300, San Diego, California, 92122
| | - Douglas C Wu
- Goldman, Butterwick, Groff, Fabi and Wu Cosmetic Laser Dermatology, A West Dermatology Company, 9339 Genesee Ave., Suite 300, San Diego, California, 92122
| | - Mitchel P Goldman
- Goldman, Butterwick, Groff, Fabi and Wu Cosmetic Laser Dermatology, A West Dermatology Company, 9339 Genesee Ave., Suite 300, San Diego, California, 92122
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Vanaman Wilson MJ, Jones IT, Bolton J, Larsen L, Wu DC, Goldman MP. Prospective studies of the efficacy and safety of the picosecond 755, 1,064, and 532 nm lasers for the treatment of infraorbital dark circles. Lasers Surg Med 2017; 50:45-50. [DOI: 10.1002/lsm.22754] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2017] [Indexed: 11/12/2022]
Affiliation(s)
| | - Isabela T. Jones
- McLean Dermatology and Skincare Center; 6849 Old Dominion Drive Suite 340, McLean Virginia 22101
| | - Joanna Bolton
- Alliant Dermatology; 8620 E. County Road 466 The Villages Florida 32162
| | - Lisa Larsen
- West Dermatology; 4060 4th Ave, Suite 415 San Diego California 92103
| | - Douglas C. Wu
- California Skin Institute; 603 S. Knickerbocker Drive Sunnyvale California 94087
| | - Mitchel P. Goldman
- California Skin Institute; 603 S. Knickerbocker Drive Sunnyvale California 94087
- Department of Dermatology,; University of California; San Diego California
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Vanaman Wilson MJ, Jones IT, Bolton J, Larsen L, Wu DC, Goldman MP. A Randomized, Investigator-Blinded Comparison of Two Topical Regimens in Fitzpatrick Skin Types III-VI With Moderate to Severe Facial Hyperpigmentation. J Drugs Dermatol 2017; 16:1127-1132. [PMID: 29141061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
UNLABELLED <p>Purpose: Though hydroquinone (HQ) remains the gold standard for treatment of hyperpigmentation, concerns about its safety have prompted the development of HQ-free topical skin lightening systems. OBJECTIVE To compare the efficacy and tolerability of a new HQ-free system and a popular HQ-based system for the improvement of facial hyperpigmentation and photoaging in darker skin types. METHODS This investigator-blinded trial randomized 30 subjects of Fitzpatrick skin types III to VI with moderate to severe hyperpigmentation to a new 7-product HQ-free system or a 7-product HQ-based system for 12 weeks. At 4, 8, and 12 week follow-up visits, a blinded investigator assessed efficacy and tolerability using standardized scales. Subjects also performed a self-assessment at each visit. SUMMARY Both the HQ-free and HQ-based systems produced significant improvements in Overall Hyperpigmentation that were sustained through week 12 (P=0.008, 0.0003). The HQ-based system demonstrated better improvement in overall hyperpigmentation at weeks 4, 8, 12 (P=0.01, 0.001, 0.003, respectively). Mottled Pigmentation Area Severity Index (MoPASI) scores improved with both systems (P=0.02, 0.01), with no statistically significant differences between the two treatment groups. Subject-rated hyperpigmentation was not different between groups. Subjects reported significantly more discomfort with the HQ-free system at week 8 (P=0.02); otherwise, measures of irritation were the same between groups. All irritation was described as mild to moderate. At week 12, 100% of subjects in the HQ-free group and 92.3% of subjects in the HQ-based group were satisfied with their outcome. CONCLUSION Both a new HQ-free skincare system and a widely-available HQ-based system improved hyperpigmentation in Fitzpatrick skin types III to VI. Though the HQ-based system produced greater improvement in hyperpigmentation when compared to the HQ-free system, there was no difference in MoPASI scores between the treatment groups. Subjects were satisfied with both treatments and reported only mild to moderate irritation using either system.</p> <p><em>J Drugs Dermatol. 2017;16(11):1127-1132.</em></p>.
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Wu DC, Goldman MP. A Topical Anti-inflammatory Healing Regimen Utilizing Conjugated Linolenic Acid for Use Post-ablative Laser Resurfacing of the Face: A Randomized, Controlled Trial. J Clin Aesthet Dermatol 2017; 10:12-17. [PMID: 29344315 PMCID: PMC5749693] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Background: Fractionated, ablative lasers are usually associated with post-treatment erythema, edema, and crusting, which can last from 5 to 14 days. Conjugated linolenic acid, an omega-5 fatty acid, has significant antioxidant and anti-inflammatory properties, and has been shown to stimulate keratinocyte proliferation and epidermal regeneration. By modulating the early inflammatory milieu and directly affecting skin structure and function, conjugated linolenic acid might therefore shorten downtime following fractionated ablative laser resurfacing of the face. Objective: To evaluate the efficacy and subject satisfaction of a topical regimen containing conjugated linolenic acid derived from pomegranate seed extract in accelerating wound healing and improving skin quality following fractionated ablative laser resurfacing of the face. Materials and Methods: Thirty-four subjects were enrolled and received fractionated CO2 laser resurfacing. Subjects were randomized to use the test healing regimen (n=24) or 1% dimethicone ointment (n=10) post-procedure. The primary endpoint was the degree of erythema, edema, crusting, and exudation evaluated by a blinded clinician at post-treatment Days 1,3,7,10, 14, and 30. Secondary endpoints included a blinded evaluator assessment of the degree of wrinkling and elastosis using the Fitzpatrick-Goldman Wrinkle and Elastosis Scale; subject-assessed degree of pain, itching, tightness, oozing, and crusting; and subject overall satisfaction. Results: Subjects who applied the topical conjugated linolenic acid healing regimen experienced significantly reduced edema on post-procedure Day 3 (p=0.04), and itching on Days 1 and 3 (p=0.03 and p=0.04). Both regimens produced significant improvements in wrinkling and elastosis at Days 14 and 30 post-treatment, with conjugated linolenic acid outperforming placebo in improvements in wrinkling at Day 14. Both regimens were well tolerated with no statistical differences in adverse events or subject satisfaction. Conclusion: The topical conjugated linolenic acid formulation outperformed placebo by decreasing acute pruritus and edema, and enabling a faster positive outcome in wrinkle improvement. Additionally, topical conjugated linolenic acid does not raise any safety or tolerability issues as compared to current standard of care.
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Affiliation(s)
- Douglas C Wu
- Drs. Wu and Goldman are with Cosmetic Laser Dermatology in San Diego, California
| | - Mitchel P Goldman
- Drs. Wu and Goldman are with Cosmetic Laser Dermatology in San Diego, California
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Wu DC, Lambowitz AM. Facile single-stranded DNA sequencing of human plasma DNA via thermostable group II intron reverse transcriptase template switching. Sci Rep 2017; 7:8421. [PMID: 28827600 PMCID: PMC5566474 DOI: 10.1038/s41598-017-09064-w] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 07/20/2017] [Indexed: 01/30/2023] Open
Abstract
High-throughput single-stranded DNA sequencing (ssDNA-seq) of cell-free DNA from plasma and other bodily fluids is a powerful method for non-invasive prenatal testing, and diagnosis of cancers and other diseases. Here, we developed a facile ssDNA-seq method, which exploits a novel template-switching activity of thermostable group II intron reverse transcriptases (TGIRTs) for DNA-seq library construction. This activity enables TGIRT enzymes to initiate DNA synthesis directly at the 3′ end of a DNA strand while simultaneously attaching a DNA-seq adapter without end repair, tailing, or ligation. Initial experiments using this method to sequence E. coli genomic DNA showed that the TGIRT enzyme has surprisingly robust DNA polymerase activity. Further experiments showed that TGIRT-seq of plasma DNA from a healthy individual enables analysis of nucleosome positioning, transcription factor-binding sites, DNA methylation sites, and tissues-of-origin comparably to established methods, but with a simpler workflow that captures precise DNA ends.
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Affiliation(s)
- Douglas C Wu
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, 78712, USA.,Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, 78712, USA
| | - Alan M Lambowitz
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, 78712, USA. .,Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, 78712, USA.
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Wu DC, Guiha I, Goldman MP. A Prospective Pilot Clinical Trial to Evaluate the Efficacy and Safety of Topical Therapy with Ingenol Mebutate Gel 0.015% for Actinic Keratosis on an Expanded Area of the Chest. J Clin Aesthet Dermatol 2017; 10:31-36. [PMID: 28979661 PMCID: PMC5605212] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
BACKGROUND: Ingenol mebutate gel 0.05% once daily for two consecutive days provides high clearance rates for actinic keratosis on a 25cm2 area of the chest. However, it may cause intense local skin responses. OBJECTIVE: The objective of this study was to determine whether a lower dose of ingenol mebutate gel 0.015% could clear actinic keratosis on the chest with acceptable tolerability and a possible beneficial effect on photodamage and cosmesis. DESIGN: This was a noncomparative, open-label study (NCT02446223). PARTICIPANTS: In total, 21 subjects were enrolled, and 20 completed the study. MEASUREMENTS: ingenol mebutate gel 0.015% was applied once daily for three consecutive days to a contiguous area of the chest less than 100cm2 containing four or more actinic keratoses. RESULTS: the actinic keratosis lesion count decreased by an average of 76 percent compared with baseline. signs of photoaging were reduced significantly at the end of the study, with greater than 60 percent of the subjects reporting moderate or complete satisfaction with skin improvement. Local skin responses generally resolved within two weeks of treatment. there were no adverse reactions. LIMITATIONS: this was a noncomparative, open-label study that evaluated a relatively small number of subjects. CONCLUSION: ingenol mebutate gel 0.015% applied to a less than 100cm2 area of the chest once daily for three consecutive days reduced the actinic keratosis count and significantly improved signs of photoaging with high patient satisfaction and good tolerability.
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Affiliation(s)
- Douglas C Wu
- Drs. Wu and Goldman and Ms. Guiha are with Cosmetic Laser Dermatology, San Diego, California
| | - Isabella Guiha
- Drs. Wu and Goldman and Ms. Guiha are with Cosmetic Laser Dermatology, San Diego, California
| | - Mitchel P Goldman
- Drs. Wu and Goldman and Ms. Guiha are with Cosmetic Laser Dermatology, San Diego, California
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Vanaman Wilson MJ, Jones IT, Wu DC, Goldman MP. A randomized, double-blind, placebo-controlled clinical trial evaluating the role of systemic antihistamine therapy for the reduction of adverse effects associated with topical 5-aminolevulinic acid photodynamic therapy. Lasers Surg Med 2017; 49:738-742. [PMID: 28489298 DOI: 10.1002/lsm.22682] [Citation(s) in RCA: 5] [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] [Accepted: 04/13/2017] [Indexed: 01/10/2023]
Abstract
BACKGROUND AND OBJECTIVE Following photodynamic therapy with 5-aminolevulinic acid (ALA-PDT), patients experience inflammation that may be partially attributable to H1 histamine receptor activation. The objective of this study was to evaluate the impact of antihistamines upon adverse effects following ALA-PDT. STUDY DESIGN/MATERIALS AND METHODS This was a randomized, placebo-controlled clinical trial conducted at a single study site. Twenty subjects with facial actinic keratoses were randomized to ALA-PDT plus cetirizine 10 mg (n = 10) versus placebo daily (n = 10) from 3 days pre-treatment to 3 days post-treatment for a total of 7 days. Signs of inflammation including erythema, edema, crusting, exudation, vesiculation, and erosion were evaluated on post-treatment days 1, 2, 3, 7, 30, 90, and 180. Actinic keratosis counts, investigator-rated Global Assessment Improvement Score (GAIS), healing, tolerability, and subject satisfaction were also assessed. RESULTS Erythema, edema, crusting, exudation, vesiculation, and erosion were not different between treatment groups. Actinic keratoses were significantly reduced by day 30 in both the antihistamine and placebo groups (P = 0.01 and 0.0009, respectively), with results sustained to day 60 in the antihistamine group and day 180 for the placebo group. However, counts were not different between groups at any time point. Investigator-rated GAIS, subject satisfaction, healing, and tolerability were similar between treatment groups. CONCLUSION This study suggests that while H1 antihistamines do not impair the efficacy of ALA-PDT, they also do not relieve post-treatment inflammation and discomfort. Lasers Surg. Med. 49:738-742, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
| | - Isabela T Jones
- Goldman, Butterwick, Groff, Fabi, and Wu Cosmetic Laser Dermatology, San Diego, California
| | | | - Mitchel P Goldman
- Goldman, Butterwick, Groff, Fabi, and Wu Cosmetic Laser Dermatology, San Diego, California
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Wu DC, Goldman MP. A Prospective, Randomized, Double-blind, Split-face Clinical Trial Comparing the Efficacy of Two Topical Human Growth Factors for the Rejuvenation of the Aging Face. J Clin Aesthet Dermatol 2017; 10:31-35. [PMID: 28670356 PMCID: PMC5479475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Background: Cosmeceutical products represent an increasingly important therapeutic option for anti-aging and rejuvenation, either used alone or in combination with dermatologic surgical procedures. Among this group of products, topical growth factors have demonstrated efficacy in randomized, controlled clinical trials. However, comparisons between different products remain uncommon. Objective: The objective of this randomized, double-blind, split-face clinical trial was to compare two different topical growth factor formulations derived from either human fibroblasts or human adipose tissue derived mesenchymal stem cells. Methods: This was an institutional review board-approved, randomized, double-blind, split-face clinical trial involving 20 healthy subjects with moderate-to-severe facial wrinkling secondary to photodamage. One half of the face was randomized to receive topical human fibroblast growth factors and the other topical human mesenchymal stem cell growth factors. Treatment was continued for three months, and evaluations were performed in a double-blind fashion. Results: Both growth factor formulations achieved significant improvement in facial wrinkling. Blinded investigator and subject evaluations did not detect any significant differences between the two formulations in terms of efficacy, safety, or tolerability. Conclusion: Both human fibroblast growth factors and human mesenchymal stem cell growth factors are effective at facial rejuvenation. Topical growth factors represent a useful therapeutic modality.
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Affiliation(s)
- Douglas C Wu
- Cosmetic Laser Dermatology, San Diego, California
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31
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Boen M, Wilson MJV, Goldman MP, Wu DC. Rejuvenation of the male scalp using 1,927 nm non-ablative fractional thulium fiber laser. Lasers Surg Med 2017; 49:475-479. [DOI: 10.1002/lsm.22624] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/01/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Monica Boen
- Department of Dermatology; University of Illinois at Chicago; 808 S. Wood St., Suite 380 Chicago Illinois 60612
| | - Monique J. Vanaman Wilson
- Goldman, Butterwick, Groff, Fabi and Wu Cosmetic Laser Dermatology; 9339 Genesee Avenue Suite 300 San Diego California 92121
| | - Mitchel P. Goldman
- Goldman, Butterwick, Groff, Fabi and Wu Cosmetic Laser Dermatology; 9339 Genesee Avenue Suite 300 San Diego California 92121
| | - Douglas C. Wu
- Goldman, Butterwick, Groff, Fabi and Wu Cosmetic Laser Dermatology; 9339 Genesee Avenue Suite 300 San Diego California 92121
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Abstract
BACKGROUND AND OBJECTIVE Fractionated photothermolysis (FP) has revolutionized modern laser technology. By creating selective columns of microthermal damage, fractionated devices allows for greater treatment depths to be achieved without the prolonged downtime and risk of complications seen in traditional fully ablative laser resurfacing. Fractional resurfacing is a proven method to treat a variety of cutaneous conditions. In the Caucasian patient, a wide range of devices and treatment settings can be utilized safely and effectively. However, ethnic skin requires special consideration due to its unique pigmentary characteristics and clinical presentations. In this review article, we detail the current indications and strategies to optimize results and mitigate complications when utilizing fractional resurfacing for the Asian patient. METHODS A review of the MEDLINE English literature was conducted on fractionated laser devices studied in the Asian population. Articles included describe non-ablative devices including fractionated erbium glass, thulium fiber, diode, and radiofrequency devices; and ablative devices including fractionated carbon dioxide (CO2 ) laser, erbium yttrium aluminum garnet and yttrium scandium gallium garnet (YSGG) laser. These data were integrated with the expert opinion of the authors. CONCLUSION Taking into account the unique characteristics and cosmetic concerns of the Asian population, fractional resurfacing can be considered a safe and effective option for the treatment of atrophic and hypertrophic scarring, and photorejuvenation in ethnic skin types. Select cases of melasma may be treated with fractionated non-ablative devices, but utilized with caution. The predominant complication associated with fractional resurfacing for these conditions is post-inflammatory hyperpigmentation (PIH) and rebound worsening of melasma. A greater number of treatments at lower density settings and wider treatment intervals typically produce the lowest risks of PIH without compromising treatment efficacy. Lasers Surg. Med. 49:45-59, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Heidi Wat
- Division of Dermatology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada, T6G 2G3
| | - Douglas C Wu
- Goldman, Butterwick, Groff, Fabi, and Wu Cosmetic Laser Dermatology, San Diego, California, 92121
| | - Henry Hin Lee Chan
- Division of Dermatology, Department of Medicine, University of Hong Kong, Hong Kong, SAR, China.,Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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Wu DC, Karnik J, Margarella T, Nguyen VL, Calame A, Goldman MP. Evaluation of the in vivo effects of various laser, light, or ultrasound modalities on human skin treated with a collagen and polymethylmethacrylate microsphere dermal filler product. Lasers Surg Med 2016; 48:811-819. [PMID: 27605395 DOI: 10.1002/lsm.22580] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/14/2016] [Indexed: 11/08/2022]
Abstract
BACKGROUND Bellafill® is a soft tissue dermal filler composed of non-resorbable polymethylmethacrylate (PMMA) microspheres, suspended in a water-based carrier gel composed of 3.5% bovine collagen. It has been approved by the FDA for the correction of nasolabial folds and atrophic facial acne scars. Energy-based therapies are used for facial rejuvenation and treatment of acne scarring. However, little has been published about the effects of energy devices on previously placed PMMA. This prospective, in vivo clinical study evaluated the safety and histopathological effects of a number of different laser, light, and ultrasound treatment modalities on PMMA-collagen filler previously injected into human tissue. METHODS Following a negative reaction to the bovine collagen skin test, the abdomen of one subject (with planned mini-abdominoplasty) was divided into a grid with 32 treatment sections. Seventeen treatment areas received subdermal injections of PMMA-collagen product (0.1-0.2 cc in each area). The subject was assessed for adverse events at each post-treatment office visit. Eighty days post-injection, 30 treatment sections were treated with laser, light, or ultrasound therapy (16 of the 17 PMMA-collagen treated areas, with two of those areas receiving a combination of therapies, and an additional 14 areas receiving laser therapy alone). One PMMA-collagen treated area was not exposed to any energy devices, and one remaining treatment area received no treatment of any kind, representing an internal control. Sixty days following energy device treatment, the tissue was excised in a planned mini-abdominoplasty procedure and sent for histological examination. RESULTS The subject experienced no adverse events during the study. No histological changes in PMMA microspheres were observed in any treatment area. An expected lymphohistiocytic response was identified in all areas where PMMA microspheres were present. CONCLUSION Laser, light, and ultrasound treatments can safely be administered following a PMMA-collagen injection. Lasers Surg. Med. 48:811-819, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Douglas C Wu
- Goldman Butterwick Groff Fabi and Wu, Cosmetic Laser Dermatology, 9339 Genesee Avenue Suite 300, San Diego, California, 92121.
| | - Jwala Karnik
- Suneva Medical, Inc., 5385 Hollister Ave Ste 100, Santa Barbara, California, 93111
| | - Tara Margarella
- Suneva Medical, Inc., 5385 Hollister Ave Ste 100, Santa Barbara, California, 93111
| | - Vivien L Nguyen
- Suneva Medical, Inc., 5385 Hollister Ave Ste 100, Santa Barbara, California, 93111
| | - Antoanella Calame
- Compass Dermatopathology, Inc., 7300 Girard Ave, La Jolla, California, 92037
| | - Mitchel P Goldman
- Goldman Butterwick Groff Fabi and Wu, Cosmetic Laser Dermatology, 9339 Genesee Avenue Suite 300, San Diego, California, 92121
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Wu DC, Fitzpatrick RE. Facial rejuvenation via the sequential combined use of multiple laser modalities: Safety and efficacy. Lasers Surg Med 2016; 48:577-83. [DOI: 10.1002/lsm.22514] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/12/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Douglas C. Wu
- Goldman, Butterwick, Groff, Fabi, and Wu, Cosmetic Laser Dermatology; 9339 Genesee Avenue, Suite 300; San Diego California 92121
| | - Richard E. Fitzpatrick
- Goldman, Butterwick, Groff, Fabi, and Wu, Cosmetic Laser Dermatology; 9339 Genesee Avenue, Suite 300; San Diego California 92121
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Nottingham RM, Wu DC, Qin Y, Yao J, Hunicke-Smith S, Lambowitz AM. RNA-seq of human reference RNA samples using a thermostable group II intron reverse transcriptase. RNA 2016; 22:597-613. [PMID: 26826130 PMCID: PMC4793214 DOI: 10.1261/rna.055558.115] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 12/30/2015] [Indexed: 05/20/2023]
Abstract
Next-generation RNA sequencing (RNA-seq) has revolutionized our ability to analyze transcriptomes. Current RNA-seq methods are highly reproducible, but each has biases resulting from different modes of RNA sample preparation, reverse transcription, and adapter addition, leading to variability between methods. Moreover, the transcriptome cannot be profiled comprehensively because highly structured RNAs, such as tRNAs and snoRNAs, are refractory to conventional RNA-seq methods. Recently, we developed a new method for strand-specific RNA-seq using thermostable group II intron reverse transcriptases (TGIRTs). TGIRT enzymes have higher processivity and fidelity than conventional retroviral reverse transcriptases plus a novel template-switching activity that enables RNA-seq adapter addition during cDNA synthesis without using RNA ligase. Here, we obtained TGIRT-seq data sets for well-characterized human RNA reference samples and compared them to previous data sets obtained for these RNAs by the Illumina TruSeq v2 and v3 methods. We find that TGIRT-seq recapitulates the relative abundance of human transcripts and RNA spike-ins in ribo-depleted, fragmented RNA samples comparably to non-strand-specific TruSeq v2 and better than strand-specific TruSeq v3. Moreover, TGIRT-seq is more strand specific than TruSeq v3 and eliminates sampling biases from random hexamer priming, which are inherent to TruSeq. The TGIRT-seq data sets also show more uniform 5' to 3' gene coverage and identify more splice junctions, particularly near the 5' ends of mRNAs, than do the TruSeq data sets. Finally, TGIRT-seq enables the simultaneous profiling of mRNAs and lncRNAs in the same RNA-seq experiment as structured small ncRNAs, including tRNAs, which are essentially absent with TruSeq.
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Affiliation(s)
- Ryan M Nottingham
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, 78712, USA Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, 78712, USA
| | - Douglas C Wu
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, 78712, USA Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, 78712, USA
| | - Yidan Qin
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, 78712, USA Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, 78712, USA
| | - Jun Yao
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, 78712, USA Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, 78712, USA
| | - Scott Hunicke-Smith
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, 78712, USA
| | - Alan M Lambowitz
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, 78712, USA Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas, 78712, USA
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Wu DC, Fitzpatrick RE, Goldman MP. Confetti-like Sparing: A Diagnostic Clinical Feature of Melasma. J Clin Aesthet Dermatol 2016; 9:48-57. [PMID: 27047632 PMCID: PMC4771390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Diagnostic uncertainty when a patient presents with melasma-like Undings can lead to suboptimal treatment and inaccurate prognostic expectations. In this study, the authors present a unique clinical feature of melasma that they term the "Fitzpatrick macule" and test its Utility in establishing diagnostic certainty. The "Fitzpatrick macule" is a confetti-like macule of regularly pigmented skin located within a larger patch of melasma hyperpigmentation. To test its diagnostic Utility, the authors compared clinical photography of known cases of melasma with common mimickers, such as poikiloderma of Civatte and solar lentiginosis, and determined the positivity rate of the Fitzpatrick macule in each scenario. Their results show that 89.1 percent of clinical photographs of melasma were positive for the presence of Fitzpatrick macules compared to 1.1 percent that were negative. In contrast, 37.5 and 56.3 percent of clinical photographs of poikiloderma of Civatte were positive and negative for Fitzpatrick macules, respectively. Solar lentiginosis showed a 5.6 percent positivity and a 77.8 percent negativity for Fitzpatrick macules. The sensitivity and specificity of Fitzpatrick macules for melasma was 99 and 83 percent, respectively. In summary, the authors report a highly sensitive and specific clinical feature of melasma. In cases of diagnostic uncertainty, the presence of Fitzpatrick macules may aid in establishing a diagnosis of melasma.
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Affiliation(s)
- Douglas C. Wu
- Goldman, Butterwick, Groff, Fabi and Wu Cosmetic Laser Dermatology, San Diego, California
| | - Richard E. Fitzpatrick
- Goldman, Butterwick, Fitzpatrick, Groff and Fabi: Cosmetic Laser Dermatology, San Diego, California
| | - Mitchel P. Goldman
- Goldman, Butterwick, Fitzpatrick, Groff and Fabi: Cosmetic Laser Dermatology, San Diego, California
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Qin Y, Yao J, Wu DC, Nottingham RM, Mohr S, Hunicke-Smith S, Lambowitz AM. High-throughput sequencing of human plasma RNA by using thermostable group II intron reverse transcriptases. RNA 2016; 22:111-28. [PMID: 26554030 PMCID: PMC4691826 DOI: 10.1261/rna.054809.115] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 10/22/2015] [Indexed: 05/21/2023]
Abstract
Next-generation RNA-sequencing (RNA-seq) has revolutionized transcriptome profiling, gene expression analysis, and RNA-based diagnostics. Here, we developed a new RNA-seq method that exploits thermostable group II intron reverse transcriptases (TGIRTs) and used it to profile human plasma RNAs. TGIRTs have higher thermostability, processivity, and fidelity than conventional reverse transcriptases, plus a novel template-switching activity that can efficiently attach RNA-seq adapters to target RNA sequences without RNA ligation. The new TGIRT-seq method enabled construction of RNA-seq libraries from <1 ng of plasma RNA in <5 h. TGIRT-seq of RNA in 1-mL plasma samples from a healthy individual revealed RNA fragments mapping to a diverse population of protein-coding gene and long ncRNAs, which are enriched in intron and antisense sequences, as well as nearly all known classes of small ncRNAs, some of which have never before been seen in plasma. Surprisingly, many of the small ncRNA species were present as full-length transcripts, suggesting that they are protected from plasma RNases in ribonucleoprotein (RNP) complexes and/or exosomes. This TGIRT-seq method is readily adaptable for profiling of whole-cell, exosomal, and miRNAs, and for related procedures, such as HITS-CLIP and ribosome profiling.
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Affiliation(s)
- Yidan Qin
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas 78712, USA Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas 78712, USA
| | - Jun Yao
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas 78712, USA Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas 78712, USA
| | - Douglas C Wu
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas 78712, USA Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas 78712, USA
| | - Ryan M Nottingham
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas 78712, USA Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas 78712, USA
| | - Sabine Mohr
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas 78712, USA Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas 78712, USA
| | - Scott Hunicke-Smith
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas 78712, USA
| | - Alan M Lambowitz
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas 78712, USA Department of Molecular Biosciences, University of Texas at Austin, Austin, Texas 78712, USA
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Wang JX, Lu C, Yuan CQ, Cui BB, Qiu QD, Sun P, Hu RY, Wu DC, Sun YH, Li Y. Characterization of ESTs from black locust for gene discovery and marker development. Genet Mol Res 2015; 14:12684-91. [PMID: 26505419 DOI: 10.4238/2015.october.19.12] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Black locust (Robinia pseudoacacia L.) is an ecologically and economically important species. However, it has relatively underdeveloped genomic resources, and this limits gene discovery and marker-assisted selective breeding. In the present study, we obtained large-scale transcriptome data using a next-generation sequencing platform to compensate for the lack of black locust genomic information. Increasing the amount of transcriptome data for black locust will provide a valuable resource for multi-gene phylogenetic analyses and will facilitate research on the mechanisms whereby conserved genes and functions are maintained in the face of species divergence. We sequenced the black locust transcriptome from a cDNA library of multiple tissues and individuals on an Illumina platform, and this produced 108,229,352 clean sequence reads. The high-quality overlapping expressed sequence tags (ESTs) were assembled into 36,533 unigenes, and 4781 simple sequence repeats were characterized. A large collection of high-quality ESTs was obtained, de novo assembled, and characterized. Our results markedly expand the previous transcript catalogues of black locust and can gradually be applied to black locust breeding programs. Furthermore, our data will facilitate future research on the comparative genomics of black locust and related species.
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Affiliation(s)
- J X Wang
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - C Lu
- Beijing Daxing Fruit and Forestry Institute, Beijing, China
| | - C Q Yuan
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - B B Cui
- Department of Biology and Chemistry, Baoding University, Hehei, China
| | - Q D Qiu
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - P Sun
- Non-Timber Forestry Research and Development Center, Chinese Academy of Forestry, Zhengzhou, China
| | - R Y Hu
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - D C Wu
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Y H Sun
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Y Li
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
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Wu DC, Fletcher L, Guiha I, Goldman MP. Evaluation of the safety and efficacy of the picosecond alexandrite laser with specialized lens array for treatment of the photoaging décolletage. Lasers Surg Med 2015; 48:188-92. [PMID: 26445089 DOI: 10.1002/lsm.22427] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/16/2015] [Indexed: 11/05/2022]
Abstract
BACKGROUND Fractionated lasers are routinely used to treat the characteristic cutaneous signs of photoaging. In this study, we evaluate the use of picosecond pulse duration combined with a diffractive lens array for treatment of photodamage of the décolletage. METHODS Twenty subjects with Fitzpatrick skin types I-IV were enrolled in a prospective open-label trial evaluating the efficacy of the 755 nm picosecond pulsed alexandrite laser with diffractive lens array for treatment of photodamage to the décolletage. Each subject received a series of four laser treatments at 3 week intervals. Follow up evaluation was performed 1 and 3 months later by a masked investigator and consisted of assessment of dyspigmentation, erythema, keratosis, texture, and rhytides on a standardized 5 point scale; global aesthetic improvement 5 point scale; and investigator and subject satisfaction questionnaire. Adverse events and treatment discomfort was also assessed. RESULTS Statistically significant improvement in dyspigmentation, keratosis, and skin texture were observed at both 1 and 3 month follow up intervals (P < 0.05). rhytides initially demonstrated significant improvement at the 1 month time point, but this significance was not maintained at 3 months (P = 0.08). There was no statistically significant improvement noted in erythema. The majority of subjects were satisfied, with a mean rating of 2.8/6 (one being extremely satisfied and six being extremely dissatisfied). Subject pain was 3.6/10. CONCLUSION The 755 nm picosecond pulsed alexandrite laser with diffractive lens array can be an effective option for rejuvenation of the photodamaged décolletage.
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Affiliation(s)
- Douglas C Wu
- Cosmetic Laser Dermatology, 9339 Genesee Avenue Suite 300, San Diego, California, 92121
| | - Leysin Fletcher
- Cosmetic Laser Dermatology, 9339 Genesee Avenue Suite 300, San Diego, California, 92121
| | - Isabella Guiha
- Cosmetic Laser Dermatology, 9339 Genesee Avenue Suite 300, San Diego, California, 92121
| | - Mitchel P Goldman
- Cosmetic Laser Dermatology, 9339 Genesee Avenue Suite 300, San Diego, California, 92121
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Geuss LR, Wu DC, Ramamoorthy D, Alford CD, Suggs LJ. Paramagnetic beads and magnetically mediated strain enhance cardiomyogenesis in mouse embryoid bodies. PLoS One 2014; 9:e113982. [PMID: 25501004 PMCID: PMC4264692 DOI: 10.1371/journal.pone.0113982] [Citation(s) in RCA: 9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 10/25/2014] [Indexed: 01/16/2023] Open
Abstract
Mechanical forces play an important role in proper embryologic development, and similarly such forces can directly impact pluripotency and differentiation of mouse embryonic stem cells (mESC) in vitro. In addition, manipulation of the embryoid body (EB) microenvironment, such as by incorporation of microspheres or microparticles, can similarly influence fate determination. In this study, we developed a mechanical stimulation regimen using permanent neodymium magnets to magnetically attract cells within an EB. Arginine-Glycine-Aspartic Acid (RGD)-conjugated paramagnetic beads were incorporated into the interior of the EBs during aggregation, allowing us to exert force on individual cells using short-term magnetization. EBs were stimulated for one hour at different magnetic field strengths, subsequently exerting a range of force intensity on the cells at different stages of early EB development. Our results demonstrated that following exposure to a 0.2 Tesla magnetic field, ESCs respond to magnetically mediated strain by activating Protein Kinase A (PKA) and increasing phosphorylated extracellular signal-regulated kinase 1/2 (pERK1/2) expression. The timing of stimulation can also be tailored to guide ESC differentiation: the combination of bone morphogenetic protein 4 (BMP4) supplementation with one hour of magnetic attraction on Day 3 enhances cardiomyogenesis by increasing contractile activity and the percentage of sarcomeric α-actin-expressing cells compared to control samples with BMP4 alone. Interestingly, we also observed that the beads alone had some impact on differentiation by increasingly slightly, albeit not significantly, the percentage of cardiomyocytes. Together these results suggest that magnetically mediated strain can be used to enhance the percentage of mouse ESC-derived cardiomyocytes over current differentiation protocols.
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Affiliation(s)
- Laura R. Geuss
- The University of Texas at Austin, Institute of Cell and Molecular Biology, Austin, Texas, United States of America
| | - Douglas C. Wu
- The University of Texas at Austin, Institute of Cell and Molecular Biology, Austin, Texas, United States of America
| | - Divya Ramamoorthy
- The University of Texas at Austin, Department of Biomedical Engineering, Austin, Texas, United States of America
| | - Corinne D. Alford
- The University of Texas at Austin, Department of Biomedical Engineering, Austin, Texas, United States of America
| | - Laura J. Suggs
- The University of Texas at Austin, Department of Biomedical Engineering, Austin, Texas, United States of America
- * E-mail:
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Wat H, Wu DC, Mahmood MN, Brassard A. Primary systemic (amyloid light-chain) amyloidosis masquerading as pseudoxanthoma elasticum: recognizing a novel clinicopathological pattern. JAMA Dermatol 2014; 150:1091-4. [PMID: 24898161 DOI: 10.1001/jamadermatol.2014.61] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
IMPORTANCE Primary systemic (amyloid light-chain [AL]) amyloidosis has a variety of cutaneous manifestations. In this case, we present a novel clinicopathological pattern of AL amyloidosis. OBSERVATIONS A woman in her 50s with a history of AL amyloidosis manifesting as macroglossia and bilateral carpal tunnel syndrome presented with skin-colored to yellow cobblestoned plaques to the neck and bilateral antecubital fossa. Although clinical similar to pseudoxanthoma elasticum (PXE), the skin changes were found to be due to amyloid deposition primarily around the pilosebaceous unit but also within the papillary and reticular dermis. Previous reports of PXE-like plaques in AL amyloidosis have been reported as part of a very rare entity termed amyloid elastosis. However, our case demonstrates several important clinical and pathological differences from this entity. Most notably, there was no dermal elastic fiber involvement, limited cutaneous and systemic involvement, and a fairly indolent course with better response to treatment. CONCLUSIONS AND RELEVANCE Identification of this atypical presentation of AL amyloidosis has important implications for early detection and rapid treatment. The lack of elastic fiber involvement establishes the uniqueness of this case, and further study may be required to determine if this histological finding has prognostic significance.
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Affiliation(s)
- Heidi Wat
- Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Douglas C Wu
- Division of Dermatology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Muhammad N Mahmood
- Division of Anatomical Pathology, Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Alain Brassard
- Division of Dermatology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
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Poh YC, Chen J, Hong Y, Yi H, Zhang S, Chen J, Wu DC, Wang L, Jia Q, Singh R, Yao W, Tan Y, Tajik A, Tanaka TS, Wang N. Generation of organized germ layers from a single mouse embryonic stem cell. Nat Commun 2014; 5:4000. [PMID: 24873804 PMCID: PMC4050279 DOI: 10.1038/ncomms5000] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Accepted: 04/29/2014] [Indexed: 12/15/2022] Open
Abstract
Mammalian inner cell mass cells undergo lineage-specific differentiation into germ
layers of endoderm, mesoderm and ectoderm during gastrulation. It has been a
long-standing challenge in developmental biology to replicate these organized germ
layer patterns in culture. Here we present a method of generating organized germ
layers from a single mouse embryonic stem cell cultured in a soft fibrin matrix.
Spatial organization of germ layers is regulated by cortical tension of the colony,
matrix dimensionality and softness, and cell–cell adhesion. Remarkably,
anchorage of the embryoid colony from the 3D matrix to collagen-1-coated 2D
substrates of ~1 kPa results in self-organization of all three
germ layers: ectoderm on the outside layer, mesoderm in the middle and endoderm at
the centre of the colony, reminiscent of generalized gastrulating chordate embryos.
These results suggest that mechanical forces via cell–matrix and
cell–cell interactions are crucial in spatial organization of germ layers
during mammalian gastrulation. This new in vitro method could be used to gain
insights on the mechanisms responsible for the regulation of germ layer
formation. The three germ layers are formed from the inner cell mass of the
mammalian embryo during gastrulation. Here, the authors present a method by which a
single mouse embryonic stem cell, derived from inner cell mass, differentiates into the
three germ layers in a self-organized manner when cultured in soft fibrin gel.
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Affiliation(s)
- Yeh-Chuin Poh
- 1] Laboratory for Cell Biomechanics and Regenerative Medicine, Department of Biomedical Engineering, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China [2] Department of Mechanical Science and Engineering, College of Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Junwei Chen
- Laboratory for Cell Biomechanics and Regenerative Medicine, Department of Biomedical Engineering, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Ying Hong
- Laboratory for Cell Biomechanics and Regenerative Medicine, Department of Biomedical Engineering, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Haiying Yi
- Laboratory for Cell Biomechanics and Regenerative Medicine, Department of Biomedical Engineering, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Shuang Zhang
- Laboratory for Cell Biomechanics and Regenerative Medicine, Department of Biomedical Engineering, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Junjian Chen
- Laboratory for Cell Biomechanics and Regenerative Medicine, Department of Biomedical Engineering, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Douglas C Wu
- Department of Mechanical Science and Engineering, College of Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Lili Wang
- Laboratory for Cell Biomechanics and Regenerative Medicine, Department of Biomedical Engineering, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Qiong Jia
- Laboratory for Cell Biomechanics and Regenerative Medicine, Department of Biomedical Engineering, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Rishi Singh
- Department of Mechanical Science and Engineering, College of Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Wenting Yao
- Laboratory for Cell Biomechanics and Regenerative Medicine, Department of Biomedical Engineering, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Youhua Tan
- 1] Laboratory for Cell Biomechanics and Regenerative Medicine, Department of Biomedical Engineering, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China [2] Department of Mechanical Science and Engineering, College of Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Arash Tajik
- Department of Mechanical Science and Engineering, College of Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Tetsuya S Tanaka
- 1] Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USA [2] Department of Biological Science, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Ning Wang
- 1] Laboratory for Cell Biomechanics and Regenerative Medicine, Department of Biomedical Engineering, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China [2] Department of Mechanical Science and Engineering, College of Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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Wat H, Wu DC, Rao J, Goldman MP. Application of Intense Pulsed Light in the Treatment of Dermatologic Disease: A Systematic Review. Dermatol Surg 2014; 40:359-77. [DOI: 10.1111/dsu.12424] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wu DC, Friedmann DP, Fabi SG, Goldman MP, Fitzpatrick RE. Comparison of Intense Pulsed Light with 1,927-nm Fractionated Thulium Fiber Laser for the Rejuvenation of the Chest. Dermatol Surg 2014; 40:129-33. [DOI: 10.1111/dsu.12398] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
Pseudomonas aeruginosa is a Gram-negative bacillus that is most frequently associated with opportunistic infection, but which can also present in the otherwise healthy patient. The range of P. aeruginosa infections varies from localized infections of the skin to life-threatening systemic disease. Many P. aeruginosa infections are marked by characteristic cutaneous manifestations. The aim of this article is to provide a comprehensive synthesis of the current knowledge of cutaneous manifestations of P. aeruginosa infection with specific emphasis on clinical features and management. The ability of P. aeruginosa to rapidly acquire antibacterial resistance is an increasingly well recognized phenomenon, and the correct application of antipseudomonal therapy is therefore of the utmost importance. A detailed discussion of currently available anti-pseudomonal agents is included, and the benefits of antimicrobial combination therapy versus monotherapy are explored. Rapid clinical recognition of P. aeruginosa infection aided by the identification of characteristic cutaneous manifestations can play a critical role in the successful management of potentially life-threatening disease.
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Affiliation(s)
- Douglas C Wu
- Division of Dermatology, University of Alberta, Edmonton, Alberta, Canada
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Vieweg M, Gissibl T, Pricking S, Kuhlmey BT, Wu DC, Eggleton BJ, Giessen H. Ultrafast nonlinear optofluidics in selectively liquid-filled photonic crystal fibers. Opt Express 2010; 18:25232-25240. [PMID: 21164870 DOI: 10.1364/oe.18.025232] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Selective filling of photonic crystal fibers with different media enables a plethora of possibilities in linear and nonlinear optics. Using two-photon direct-laser writing we demonstrate full flexibility of individual closing of holes and subsequent filling of photonic crystal fibers with highly nonlinear liquids. We experimentally demonstrate solitonic supercontinuum generation over 600 nm bandwidth using a compact femtosecond oscillator as pump source. Encapsulating our fibers at the ends we realize a compact ultrafast nonlinear optofluidic device. Our work is fundamentally important to the field of nonlinear optics as it provides a new platform for investigations of spatio-temporal nonlinear effects and underpins new applications in sensing and communications. Selective filling of different linear and nonlinear liquids, metals, gases, gain media, and liquid crystals into photonic crystal fibers will be the basis of new reconfigurable and versatile optical fiber devices with unprecedented performance. Control over both temporal and spatial dispersion as well as linear and nonlinear coupling will lead to the generation of spatial-temporal solitons, so-called optical bullets.
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Affiliation(s)
- M Vieweg
- 4th Physics Institute and Research Center SCOPE, University of Stuttgart, 70550 Stuttgart, Germany.
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Abstract
The purpose of this paper was to develop a technique using computerized image analysis to measure the width of retinal arteries and veins on color fundus photographs. The width of the retinal vessel was determined from digitized fundus photographs by programs based on edge detection and boundary tracing. The average vessel width was determined at different distances or eccentricities from the center of the optic disc and using various lengths of vessel segment. Measurements of superior and inferior temporal vessel width for 20 eyes by 2 operators showed that about 75% of the measurements could be obtained without the use of plan points. The average percent coefficient of variation of the measurements was 2.17% for 3 measurements of each vessel. This technique provides a reproducible and objective method for obtaining the following parameters: the edges of the vessel, the length of the vessel segment to be measured, location of the measurement along the vessel and subsequent retinal vessel width. This technique is readily suitable for application to clinical studies particularly clinical trials.
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Affiliation(s)
- D C Wu
- Tufts University School of Medicine, Boston, MA, USA
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Wu DC, Wieckiewicz J, Wood KJ. HUMAN REGULATORY T CELLS PREVENT ISLET ALLOGRAFT REJECTION. CLIN INVEST MED 2008. [DOI: 10.25011/cim.v31i4.4832] [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: 11/03/2022]
Abstract
Background: Type 1 diabetes mellitus represents a significant burden on global healthcare. Pancreatic islet transplantation offers an effective means of controlling the disease, but shortage of donor tissue, graft thrombosis, and immunological rejection after transplantation remain obstacles that need to be overcome. Our aim was to assess the ability of ex vivo expanded human regulatory T cells (Treg) in modulating the rejection response against a human islet allograft in a clinically relevant model of human pancreatic islet transplantation.
Methods: We studied the rejection response against allogeneic human islets in acohort of 32 immunodeficient mice which had been reconstituted with a functional human immune system. Thirteen subjects were transplanted with human islets without further immunological modification; graft survival was compared with that of thirteen subjects treated additionally with human regulatory T cells. Six controls were given a human islet transplant, but not reconstituted with human immune cells to demonstrate the functionality of the islet graft in the absence of immunological rejection. Graft function was assessed with serial blood glucose measurements, immunohistochemistry,immunoflourescence, and flow cytometry.
Findings: Human islet allografts were rapidly rejected in subjects that did notreceive Treg. With Treg treatment, however, human islet allograft rejection was prevented (median survival time (MST) of > 45 days with Treg, as opposed to an MST of 23 days without Treg). Ex vivo expanded Treg homed to the lymphoid tissue draining the graft site where they suppressed the priming, activation, proliferation, and effector cytokine production of alloreactive T cells.
Interpretation: These findings in a clinically relevant model of human pancreatic islet transplantation demonstrate the ability of ex vivo expanded human Treg to attenuate acute islet allograft rejection, and provide further support for their use in cellular immunotherapy.
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Hsu PI, Wu DC, Chen A, Peng NJ, Tseng HH, Tsay FW, Lo GH, Lu CY, Yu FJ, Lai KH. Quadruple rescue therapy for Helicobacter pylori infection after two treatment failures. Eur J Clin Invest 2008; 38:404-9. [PMID: 18435764 DOI: 10.1111/j.1365-2362.2008.01951.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [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] [Indexed: 12/15/2022]
Abstract
BACKGROUND A standard third-line therapy for Helicobacter pylori infection is lacking, and antimicrobial sensitivity data for patients who failed eradication therapy are often unavailable in clinical practice. We therefore designed the prospective study to assess the efficacy of levofloxacin, amoxicillin, bismuth and rabeprazole quadruple therapy as a third-line treatment for H. pylori infection. PATIENTS AND METHODS From September 2005 to August 2007, 37 consecutive H. pylori-infected patients who had failed standard first-line and second-line treatments underwent a 10-day quadruple therapy comprising rabeprazole (20 mg b.i.d.), bismuth subcitrate (300 mg q.d.s.), amoxicillin (500 mg q.d.s.) and levofloxacin (500 mg o.d.). Follow-up endoscopy with rapid urease test, histological examination and culture was performed at 6 weeks after the end of treatment to evaluate the response to therapy. RESULTS Helicobacter pylori was successfully eradicated in 31 out of 37 patients (84% by both intention-to-treat analysis and per-protocol analysis). All patients complied with the eradication therapies, and only seven patients (19%) complained of mild-to-moderate adverse events. Amoxicillin- and levofloxacin-resistant strains were observed in 17% and 22% of the patients, respectively. There were no significant differences between H. pylori eradication rates and antibiotic resistances. CONCLUSIONS The 10-day levofloxacin- and amoxicillin-based quadruple therapy is well tolerated and achieves a high eradication rate as a third-line empirical treatment for H. pylori infection.
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Affiliation(s)
- P I Hsu
- Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
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Hsu PI, Wu DC, Chen A, Peng NJ, Tseng HH, Tsay FW, Lo GH, Lu CY, Yu FJ, Lai KH. Quadruple rescue therapy for Helicobacter pylori infection after two treatment failures. Eur J Clin Invest 2008. [PMID: 18435764 DOI: 10.1111/j.1365-2362.2008.01951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND A standard third-line therapy for Helicobacter pylori infection is lacking, and antimicrobial sensitivity data for patients who failed eradication therapy are often unavailable in clinical practice. We therefore designed the prospective study to assess the efficacy of levofloxacin, amoxicillin, bismuth and rabeprazole quadruple therapy as a third-line treatment for H. pylori infection. PATIENTS AND METHODS From September 2005 to August 2007, 37 consecutive H. pylori-infected patients who had failed standard first-line and second-line treatments underwent a 10-day quadruple therapy comprising rabeprazole (20 mg b.i.d.), bismuth subcitrate (300 mg q.d.s.), amoxicillin (500 mg q.d.s.) and levofloxacin (500 mg o.d.). Follow-up endoscopy with rapid urease test, histological examination and culture was performed at 6 weeks after the end of treatment to evaluate the response to therapy. RESULTS Helicobacter pylori was successfully eradicated in 31 out of 37 patients (84% by both intention-to-treat analysis and per-protocol analysis). All patients complied with the eradication therapies, and only seven patients (19%) complained of mild-to-moderate adverse events. Amoxicillin- and levofloxacin-resistant strains were observed in 17% and 22% of the patients, respectively. There were no significant differences between H. pylori eradication rates and antibiotic resistances. CONCLUSIONS The 10-day levofloxacin- and amoxicillin-based quadruple therapy is well tolerated and achieves a high eradication rate as a third-line empirical treatment for H. pylori infection.
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Affiliation(s)
- P I Hsu
- Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
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