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https://www.readbyqxmd.com/read/28795376/arabidopsis-prk6-interacts-specifically-with-atropgef8-12-and-induces-depolarized-growth-of-pollen-tubes-when-overexpressed
#1
Yuexuan Yu, Jiali Song, Xiaohui Tian, Haiwen Zhang, Legong Li, Huifen Zhu
The pollen receptor kinases (PRK) are critical regulators of pollen tube growth. The Arabidopsis genome encodes eight PRK genes, of which six are highly expressed in pollen tubes. The potential functions of AtPRK1 through AtPRK5, but not of AtPRK6, in pollen growth were analyzed in tobacco. Herein, AtPRK6 was cloned, and its function was identified. AtPRK6 was expressed specifically in pollen tubes. A yeast two-hybrid screen of AtPRK6 against 14 Arabidopsis Rop guanine nucleotide exchange factors (RopGEFs) showed that AtPRK6 interacted with AtRopGEF8 and AtRopGEF12...
August 8, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28791058/stereoacuity-after-wavefront-guided-photorefractive-keratectomy-in-anisometropia
#2
Farid Karimian, Vahid Ownagh, Mohammad Aghazadeh Amiri, Seyed Mehdi Tabatabaee, Nooshin Dadbin
PURPOSE: To determine changes in stereoacuity in anisometropic myopic eyes after photorefractive keratectomy (PRK). METHODS: Myopic patients with at least 1 diopter (D) of anisometropia in sphere, astigmatism, or spherical equivalent who were referred to our hospital for excimer refractive surgery were enrolled as a prospective sequential interventional case series. All patients underwent wavefront-guided photorefractive keratectomy (WFG-PRK) using the Technolas Perfect Vision (217z) Excimer laser machine...
July 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28791056/accuracy-of-different-topographic-instruments-in-calculating-corneal-power-after-myopic-photorefractive-keratectomy
#3
Alireza Baradaran-Rafii, Sahba Fekri, Mohammad Rezaie, Shahram Salehi-Rad, Ali Moradi, Tahmineh Motevasseli, Masumeh Kalantarion
PURPOSE: To compare the corneal power measurements obtained using different topographic instruments after myopic photorefractive keratectomy (PRK). METHODS: Patients with myopia who were candidates for corneal refractive surgery were sequentially included. Pre-PRK and six months post-PRK corneal powers were measured using Javal manual keratometer, Orbscan II, Galilei, Tomey TMS4, and EyeSys 2000 topographers. Measured values were compared with those obtained using the clinical history method (CHM)...
July 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28769723/diversity-and-biogeography-of-land-snails-mollusca-gastropoda-in-the-limestone-hills-of-perak-peninsular-malaysia
#4
Junn Kitt Foon, Gopalasamy Reuben Clements, Thor-Seng Liew
Limestone hills are now gaining global conservation attention as hotspots for short-range endemic species. Levels of land snail endemism can be high at limestone hills, especially at hill clusters that are geographically isolated. In the State of Perak, Peninsular Malaysia, limestone hills have been opportunistically surveyed for land snails in the past, but the majority have yet to be surveyed. To address this knowledge gap, we systematically surveyed the terrestrial malacofauna of 12 limestone hills that, based on our opinion, are a representation of the limestone land snail assemblages within the State...
2017: ZooKeys
https://www.readbyqxmd.com/read/28741163/-visual-improvement-by-aberration-free-excimer-laser-retreatment-therapy-after-combined-photorefractive-keratectomy-and-keratome-laser-in-situ-keratomileusis-treatment
#5
M Böhm, C Gruber, E Hemkeppler, T Kohnen
A 23-year-old male patient presented with reduced visual acuity of the right eye, along with halos and starbursts in both eyes after a one-stage tissue-saving treatment, a combination of myopic photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK). After an extensive preliminary examination and analysis of the examination results, aberration-free LASIK retreatment for reducing astigmatism and enlargement of the optical zone with an excimer laser was performed on the right eye. The visual performance and the subjectively perceived optical quality improved postoperatively...
July 24, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28732618/predictors-of-myopic-photorefractive-keratectomy-retreatment
#6
Russell Pokroy, Michael Mimouni, Tzahi Sela, Gur Munzer, Igor Kaiserman
PURPOSE: To determine the factors associated with retreatment after photorefractive keratectomy (PRK) in myopic eyes. SETTING: Care-Vision Laser Centers, Tel-Aviv, Israel. DESIGN: Retrospective cohort study. METHODS: A large database on myopic PRK with mitomycin-C (MMC) performed from 2005 to 2012 was studied. Patients were divided into 2 groups according to whether they had retreatment. Multiple preoperative and intraoperative parameters were analyzed for association with retreatment...
June 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28727706/opioids-for-ocular-pain-a-narrative-review
#7
Vinicius Bp Pereira, Renato Garcia, Andre Am Torricelli, Samir J Bechara
BACKGROUND: Refractive surgery is a common procedure, but may be associated with severe post-operative pain. OBJECTIVES: To describe studies addressing the use of opioids for control of pain after ocular surgery, with an emphasis on refractive surgery. STUDY DESIGN: This is a narrative review of relevant articles on the physiology of corneal pain and the use of opioids for its treatment after surgery. SETTING: Single tertiary center...
July 2017: Pain Physician
https://www.readbyqxmd.com/read/28717027/regulation-of-the-calvin-benson-bassham-cycle-in-the-enigmatic-diatoms-biochemical-and-evolutionary-variations-on-an-original-theme
#8
REVIEW
Erik Jensen, Romain Clément, Stephen C Maberly, Brigitte Gontero
In Plantae, the Calvin-Benson-Bassham (CBB) cycle is highly regulated and most of its enzymes have been thoroughly studied. Since diatoms arose as a result of secondary endosymbiosis with one or more Plantae ancestors, their precise evolutionary history is enigmatic and complex resulting in biochemical variations on the original CBB cycle theme. The Rubisco Michaelis constant for CO2 is higher in diatoms than land plants and the nuclear-encoded Rubisco activase in Plantae is replaced by an analogous chloroplast-encoded CbbX (Calvin-Benson-Bassham protein X) in diatoms...
September 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28700139/oct-layered-tomography-of-the-cornea-provides-new-insights-on-remodeling-after-photorefractive-keratectomy
#9
Rachana S Chandapura, Rohit Shetty, Rushad Shroff, Neha Shilpy, Mathew Francis, Abhijit Sinha Roy
OCT topography of corneal layers was generated to analyze the remodeling of the epithelium and stroma after photorefractive keratectomy (PRK). Myopic PRK was performed in 15 patients. One eye underwent manual scraping of epithelium while the other was treated with Epi clear™. Epi clear allowed a gentler removal of the epithelium compared to manual scraping. Scheimpflug (Pentacam™, OCULUS Optikgerate Gmbh, Germany) and OCT (RTVue™, Optovue Inc., USA) scan of the cornea was performed before and after PRK (3 months)...
July 12, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28652697/efficacy-and-safety-of-a-3-month-loteprednol-etabonate-0-5-gel-taper-for-routine-prophylaxis-after-photorefractive-keratectomy-compared-to-a-3-month-prednisolone-acetate-1-and-fluorometholone-0-1-taper
#10
Mark D Mifflin, Brent S Betts, P Adam Frederick, Jason M Feuerman, Carlton R Fenzl, Majid Moshirfar, Brian Zaugg
PURPOSE: To compare the outcome of photorefractive keratectomy (PRK) and complications in patients treated with either loteprednol etabonate 0.5% gel or prednisolone acetate 1% suspension and fluorometholone (fml) 0.1% suspension. SETTING: John A Moran Eye Center, University of Utah, Salt Lake City, UT, USA. DESIGN: Prospective, randomized, partially masked trial. METHODS: PRK was performed on 261 eyes of 132 participants...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28651810/comparison-of-5468-retreatments-after-laser-in-situ-keratomileusis-by-lifting-the-flap-or-performing-photorefractive-keratectomy-on-the-flap
#11
J Ortega-Usobiaga, F Llovet-Osuna, T Katz, M R Djodeyre, V Druchkiv, R Bilbao-Calabuig, J Baviera
PURPOSE: To assess visual outcomes of retreatment after laser in situ keratomileusis (LASIK) by lifting the flap or performing photorefractive keratectomy (PRK) on the flap, as well as to establish whether there was an increased risk of epithelial ingrowth (EIG) when LASIK and lifting of the flap are separated by a long time interval and to determine the incidence of corneal haze after PRK. METHODS: Retrospective study of 4077 patients (5468 eyes) who underwent LASIK and subsequent retreatment were reviewed in order to study their visual results and identify cases of EIG and corneal haze...
June 23, 2017: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/28626819/comparison-of-bandage-contact-lens-removal-on-the-fourth-versus-seventh-postoperative-day-after-photorefractive-keratectomy-a-randomized-clinical-trial
#12
Mehrdad Mohammadpour, Delaram Shakoor, Hassan Hashemi, Mohamad Aghaie Meybodi, Fateme Rajabi, Pegah Hosseini
PURPOSE: To compare the outcomes of bandage contact lens (BCL) removal on the fourth versus seventh post-operative day following photorefractive keratectomy (PRK). METHODS: This study recruited eyes of patients who underwent PRK surgery. The patients were randomly assigned to 2 groups. In Group 1 BCL was removed on the 4th postoperative day, while in Group 2, BCL was removed on the 7th postoperative day. After BCL removal, patients were asked to express their pain score and eye discomfort...
June 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28626818/astigmatic-treatment-with-photorefractive-keratectomy-investigations-of%C3%A2-non-keratometric-ocular-astigmatism
#13
Alireza Peyman, Zahra Dastborhan, Mohammadreza Peyman
PURPOSE: To evaluate the effect of non-keratometric ocular astigmatisms on visual and refractive outcomes after photorefractive keratectomy (PRK) for correction of myopic astigmatisms. METHODS: Seventy one eyes of 36 subjects were enrolled in this study. Patients underwent PRK for treatment of myopia. Subjects were evaluated for refractive error, keratometry, and visual acuity before and six months after surgery. Pre- and post-op non-keratometric astigmatisms were calculated by vectorial analysis of the difference between the corneal plane refractive astigmatism and keratometric astigmatism...
June 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28622316/corneal-densitometry-after-photorefractive-keratectomy-laser-assisted-in-situ-keratomileusis-and-small-incision-lenticule-extraction
#14
F Poyales, N Garzón, J Mendicute, I Illarramendi, P Caro, O Jáñez, F Argüeso, A López
PurposeThe aim of this study was to gain greater insight into the corneal densitometry changes occurring as a result of refractive surgery and to compare these changes across three widely used surgical techniques, namely, photorefractive keratectomy (PRK), laser-assisted in situ keratomileusis with a femtosecond laser (LASIK-FS), or ReLEx small-incision lenticule extraction (ReLEx SMILE).Patients and methodsThree hundred and thirty-six patients (184 male and 152 female patients) participated in this study. They were split into three groups according to the refractive surgery technique they had undergone: LASIK-FS (74 patients), PRK (153 patients), and ReLEx SMILE (109 patients)...
June 16, 2017: Eye
https://www.readbyqxmd.com/read/28612330/endothelial-cell-changes-after-photorefractive-keratectomy-with-graded-usage-of-mitomycin-c
#15
Hamid Gharaee, Siamak Zarei-Ghanavati, Reza Alizadeh, Mojtaba Abrishami
PURPOSE: To compare differences in the endothelial cells before and after photorefractive keratectomy (PRK) for myopia with refractive error graded mitomycin C (MMC) application. METHODS: In a prospective randomized clinical trial, forty-eight myopic patients referred to Khatam-al-Anbia Eye Hospital, Mashhad, Iran, for PRK. Patients were treated with PRK by a Bausch and Lomb Technolas 217z excimer laser (Bausch and Lomb, Rochester, NY). MMC was applied after PRK 5 s for each diopter of spherical equivalent myopic refractive error corrected...
June 13, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28606616/the-effect-of-previous-soft-contact-lens-wear-on-corneal-refractive-surgery-outcomes
#16
Aoife Lloyd-McKernan, Luisa Simo Mannion, Veronica O'Dwyer
PURPOSE: To examine the influence of previous soft contact lens (SCL) wear on corneal refractive surgery (CRS) outcomes when SCL wear is ceased for two weeks versus twenty-four hours, and also when compared to no wear, prior to CRS. METHODS: A retrospective examination of CRS patient records was carried out for two groups of patients- who ceased SCL wear for two weeks (n=45) and for twenty-four hours (n=49) prior to CRS and compared to a non-contact lens (NCL) control group (n=45 and n=49, respectively)...
June 10, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28591657/agc-kinases-mechanisms-of-regulation-%C3%A2-and-innovative-drug-development
#17
REVIEW
Alejandro E Leroux, Jörg O Schulze, Ricardo M Biondi
The group of AGC kinases consists of 63 evolutionarily related serine/threonine protein kinases comprising PDK1, PKB/Akt, SGK, PKC, PRK/PKN, MSK, RSK, S6K, PKA, PKG, DMPK, MRCK, ROCK, NDR, LATS, CRIK, MAST, GRK, Sgk494, and YANK, while two other families, Aurora and PLK, are the most closely related to the group. Eight of these families are physiologically activated downstream of growth factor signalling, while other AGC kinases are downstream effectors of a wide range of signals. The different AGC kinase families share aspects of their mechanisms of inhibition and activation...
June 4, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28567645/extraction-and-curation-of-gene-models-for-plant-receptor-kinases-for-phylogenetic-analysis
#18
Aleksia Vaattovaara, Jarkko Salojärvi, Michael Wrzaczek
Analysis of gene families and identification of homologous genes are important for phylogenetic analysis and for translating results from model to crop species. While numerous plant genomes have been sequenced and made available, the identification of gene models can be difficult, in particular for large gene families arranged in tandem repeats or encoding proteins with a variable number of internal repeats. Thus, correct annotation of plant receptor kinases (PRK) is a challenge. Here, we describe a workflow for the semi-manual extraction, annotation, and verification of genes from annotated gene models as well as from non-annotated DNA regions...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28551832/comparison-of-relex-smile-and-prk-in-terms-of-visual-and-refractive-outcomes-for-the-correction-of-low-myopia
#19
Sri Ganesh, Sheetal Brar, Utsav Patel
PURPOSE: To compare the objective and subjective quality of vision after femtosecond laser-assisted small incision lenticule extraction (SMILE) and photorefractive keratectomy (PRK) for low myopia. METHODS: One hundred and twenty eyes from 60 patients (34 females, 26 males) undergoing bilateral correction of low myopia (≤-4 D SE) with either ReLEx SMILE or PRK were included. Visual acuity, contrast sensitivity and higher-order aberrations were recorded preoperatively and compared postoperatively...
May 27, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28544605/assessment-of-meibomian-glands-and-tear-film-in-post-refractive-surgery-patients
#20
Ji Won Jung, Jung Yong Kim, Hee Seung Chin, Young Ju Suh, Tae-Im Kim, Kyoung Yul Seo
IMPORTANCE: Corneal refractive surgery may impact meibomian gland and tear film in post-refractive surgery patients. BACKGROUND: To compare ocular surface parameters between post-refractive surgery patients and normal controls. DESIGN: Cross-sectional single center study PARTICIPANTS: A total of 120 eyes of 120 subjects were divided into three groups: (i) 60 controls and 60 patients underwent corneal refractive surgery at least 12 months ago; (ii) 30 post-laser in-situ keratomileusis (LASIK) patients and (iii) 30 post-laser epithelial keratomileusis (LASEK)/photo-refractive keratectomy (PRK) patients...
May 22, 2017: Clinical & Experimental Ophthalmology
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