Tämä sivu käännettiin automaattisesti, eikä käännösten tarkkuutta voida taata. Katso englanninkielinen versio lähdetekstiä varten.

PREVAIL VII: Cataract Surgery in Ebola Survivors

maanantai 7. kesäkuuta 2021 päivittänyt: National Eye Institute (NEI)

PREVAIL VII: Persistence of Ebola Virus in Ocular Tissues and Outcomes of Cataract Surgery in Survivors of Ebola Virus Disease

Objective: Zaire ebolavirus is a single-stranded RNA virus associated with high morbidity and mortality. The most recent epidemic of Ebola virus disease (EVD) in West Africa resulted in over 11,000 deaths and disabling sequelae among survivors, among which eye complications are highly represented. Chronic intraocular inflammation and viral persistence may result in posterior synechiae and cataract formation, resulting in loss of visual acuity and requiring surgical intervention to resolve. Approximately one out of ten Ebola survivors present with cataract, most of whom will require intraocular surgery during their lifetime, and many of whom require intervention in the near future to regain quality of life. For survivors who are blind from cataract, cataract extraction is necessary to restore visual function, allow reintegration into society and facilitate performance of activities of daily living.

However, surgical parameters among Ebola survivors are unknown, including whether Ebola viral RNA persists in aqueous humor, whether additional anti-inflammatory medication is needed, and the expected degree of improvement in visual function. Moreover, sites of viral persistence are unknown, and it is unclear if lens tissues removed during cataract surgery may harbor virus in Ebola-affected eyes. We propose following EVD survivors and control subjects undergoing cataract surgery to determine visual outcomes among Ebola survivors and explore detection of the presence of virus in lens tissues. The data will inform both future surgical intervention and aid in the understanding of the pathophysiology of Ebola-associated eye disease.

Study Population: Up to 60 Ebola survivors and up to 60 controls will be enrolled. The accrual ceiling is 120 participants.

Design: This is a prospective, natural history study to evaluate the persistence of Ebola viral RNA in the eyes of Ebola survivors and assess the response to cataract surgery in survivors as compared to controls. EVD survivors will first undergo assessment of aqueous humor for the presence of viral RNA. Survivors testing negative for viral RNA and control subjects will undergo clinically indicated cataract surgery. Subjects will be evaluated 1 day, 1 week, 1 month, and 3, 6, 9 and 12 months after surgery for safety and visual outcome assessments, and more often as clinically indicated.

Outcome Measures: The primary outcomes are: 1) the proportion of EVD survivors with evidence of persistence of Ebola viral RNA in ocular tissue and 2) the comparison of amount of intraocular inflammation, as measured by average grade of anterior chamber cell by SUN criteria, between EVD survivors and controls at 1 month and 3 months following cataract surgery. Secondary outcomes include: 1) the proportion of survivors with at least 20/40 best corrected visual acuity (BCVA) after cataract surgery, relative to controls; 2) impact of the covariates age and gender on viral persistence and cataract outcomes; 3) post-operative optical coherence tomography results in EVD survivors.

Tutkimuksen yleiskatsaus

Tila

Valmis

Ehdot

Interventio / Hoito

Yksityiskohtainen kuvaus

Objective: Zaire ebolavirus is a single-stranded RNA virus associated with high morbidity and mortality. The most recent epidemic of Ebola virus disease (EVD) in West Africa resulted in over 11,000 deaths and disabling sequelae among survivors, among which eye complications are highly represented. Chronic intraocular inflammation and viral persistence may result in posterior synechiae and cataract formation, resulting in loss of visual acuity and requiring surgical intervention to resolve. Approximately one out of ten Ebola survivors present with cataract, most of whom will require intraocular surgery during their lifetime, and many of whom require intervention in the near future to regain quality of life. For survivors who are blind from cataract, cataract extraction is necessary to restore visual function, allow reintegration into society and facilitate performance of activities of daily living.

However, surgical parameters among Ebola survivors are unknown, including whether Ebola viral RNA persists in aqueous humor, whether additional anti-inflammatory medication is needed, and the expected degree of improvement in visual function. Moreover, sites of viral persistence are unknown, and it is unclear if lens tissues removed during cataract surgery may harbor virus in Ebola-affected eyes. We propose following EVD survivors and control subjects undergoing cataract surgery to determine visual outcomes among Ebola survivors and explore detection of the presence of virus in lens tissues. The data will inform both future surgical intervention and aid in the understanding of the pathophysiology of Ebola-associated eye disease.

Study Population: Up to 60 Ebola survivors and up to 60 controls will be enrolled. The accrual ceiling is 120 participants.

Design: This is a prospective, natural history study to evaluate the persistence of Ebola viral RNA in the eyes of Ebola survivors and assess the response to cataract surgery in survivors as compared to controls. EVD survivors will first undergo assessment of aqueous humor for the presence of viral RNA. Survivors testing negative for viral RNA and control subjects will undergo clinically indicated cataract surgery. Subjects will be evaluated 1 day, 1 week, 1 month, and 3, 6, 9 and 12 months after surgery for safety and visual outcome assessments, and more often as clinically indicated.

Outcome Measures: The primary outcomes are: 1) the proportion of EVD survivors with evidence of persistence of Ebola viral RNA in ocular tissue and 2) the comparison of amount of intraocular inflammation, as measured by average grade of anterior chamber cell by SUN criteria, between EVD survivors and controls at 1 month and 3 months following cataract surgery. Secondary outcomes include: 1) the proportion of survivors with at least 20/40 best corrected visual acuity (BCVA) after cataract surgery, relative to controls; 2) impact the of covariates, age and gender on viral persistence and cataract outcomes; 3) post-operative optical coherence tomography results in EVD survivors.

Opintotyyppi

Interventio

Ilmoittautuminen (Todellinen)

37

Vaihe

  • Ei sovellettavissa

Yhteystiedot ja paikat

Tässä osiossa on tutkimuksen suorittajien yhteystiedot ja tiedot siitä, missä tämä tutkimus suoritetaan.

Opiskelupaikat

      • Monrovia, Liberia
        • PREVAIL JFK Hospital

Osallistumiskriteerit

Tutkijat etsivät ihmisiä, jotka sopivat tiettyyn kuvaukseen, jota kutsutaan kelpoisuuskriteereiksi. Joitakin esimerkkejä näistä kriteereistä ovat henkilön yleinen terveydentila tai aiemmat hoidot.

Kelpoisuusvaatimukset

Opintokelpoiset iät

14 vuotta ja vanhemmat (Lapsi, Aikuinen, Vanhempi Aikuinen)

Hyväksyy terveitä vapaaehtoisia

Ei

Sukupuolet, jotka voivat opiskella

Kaikki

Kuvaus

  • INCLUSION CRITERIA:

To be eligible, the following inclusion criteria must be met, where applicable.

  1. Participant must be 14 years of age or older.
  2. Participant must be able to understand and sign an informed consent or have a parent/legal guardian do so if they are minor children or a legally authorized representative to provide consent for adults without consent capacity.
  3. Participant must be either:

    • an Ebola virus disease (EVD) seropositive survivor or seropositive control OR
    • an EVD seronegative survivor or seronegative control (Serology confirmation is available for PREVAIL participants and will be conducted for non-PREVAIL participants.).
  4. Participant must have visually significant cataract(s) consistent with level of visual deficit.
  5. Participant must have corrected visual acuity worse than 20/40 in affected eye and vision loss believed to be primarily the result of the cataract.
  6. Any woman and persons of childbearing potential age have a negative pregnancy test at screening and must be willing to undergo pregnancy testing prior to the cataract surgery.

EXCLUSION CRITERIA:

A participant is not eligible if any of the following exclusion criteria are present.

  1. Concurrent life-threatening illness or other condition that compromises a participant's ability to safely undergo surgery, as determined by the surgical and medical team, including any condition that prevents the participant from lying down supine or remaining still, such as severe lung disease, or a known life-threatening, untreated or unstable cardiac or pulmonary condition.
  2. Active uveitis at time of surgery or within the past three months, if documented.
  3. Participant is pregnant, as surgery is elective and no adequate data regarding the use of postoperative topical antibiotic-steroid combination drops exists in pregnant women.
  4. Any condition that poses a risk to the participant having a safe surgical or post-operative experience, including known inability or unwillingness to follow up for the full duration of the protocol.

Opintosuunnitelma

Tässä osiossa on tietoja tutkimussuunnitelmasta, mukaan lukien kuinka tutkimus on suunniteltu ja mitä tutkimuksella mitataan.

Miten tutkimus on suunniteltu?

Suunnittelun yksityiskohdat

  • Ensisijainen käyttötarkoitus: Hoito
  • Jako: Ei satunnaistettu
  • Inventiomalli: Yksittäinen ryhmätehtävä
  • Naamiointi: Ei mitään (avoin tarra)

Aseet ja interventiot

Osallistujaryhmä / Arm
Interventio / Hoito
Active Comparator: Control
Control with clinical need for cataract surgery
Cataract surgery and aqueous humor sampling.
Kokeellinen: EVD Survivors
EVD survivors with need for cataract surgery
Cataract surgery and aqueous humor sampling.

Mitä tutkimuksessa mitataan?

Ensisijaiset tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
Proportion of EVD Survivors With Evidence of Persistence of Ebola Viral RNA in Ocular Tissue
Aikaikkuna: One week prior to cataract surgery

Participants undergo aqueous fluid (aqueous humor) sampling to assess for the presence of Ebola virus RNA via RT-PCR using the GeneXpert assay.

The study was intended to include analysis of lens tissue to explore detection of the presence of virus in lens tissue in EVD survivors; however, the collected lens tissue samples were damaged during storage and transport. Therefore, the lens samples were unable to yield any reportable data.

One week prior to cataract surgery
Comparison of the Amount of Intraocular Inflammation Between EVD Survivors and Controls at 1 Month Following Cataract Surgery
Aikaikkuna: 1 month after cataract surgery

The amount of intraocular inflammation is measured by the average grade of anterior chamber (AC) cell per Standardization of Uveitis Nomenclature (SUN) criteria.

AC cell grading, with higher grades indicating a worse outcome:

Grade 0 -- 0-5 cells per 1 mm x 1 mm high-powered field; Grade 1 -- 6-15 cells per 1 mm x 1 mm high-powered field; Grade 2 -- 16-25 cells per 1 mm x 1 mm high-powered field; Grade 3 -- 26-50 cells per 1 mm x 1 mm high-powered field; Grade 4 -- > 50 cells per 1 mm x 1 mm high-powered field

1 month after cataract surgery
Comparison of the Amount of Intraocular Inflammation Between EVD Survivors and Controls at 3 Months Following Cataract Surgery
Aikaikkuna: 3 months after cataract surgery

The amount of intraocular inflammation is measured by the average grade of anterior chamber cell per Standardization of Uveitis Nomenclature (SUN) criteria.

AC cell grading, with higher grades indicating a worse outcome:

Grade 0 -- 0-5 cells per 1 mm x 1 mm high-powered field; Grade 1 -- 6-15 cells per 1 mm x 1 mm high-powered field; Grade 2 -- 16-25 cells per 1 mm x 1 mm high-powered field; Grade 3 -- 26-50 cells per 1 mm x 1 mm high-powered field; Grade 4 -- > 50 cells per 1 mm x 1 mm high-powered field

3 months after cataract surgery

Toissijaiset tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
Comparison of Proportion of Eyes With at Least 20/40 Best Corrected Visual Acuity (BCVA) 12 Months After Cataract Surgery
Aikaikkuna: 12 months (1 year) after cataract surgery
Comparison of proportion with at least 20/40 best corrected visual acuity (BCVA) after cataract surgery 12 months in survivors vs controls. Best corrected visual acuity was measured using the Tumbling-E Early Treatment Diabetic Retinopathy Study (ETDRS) protocol vision chart. Acuity is measured as letters read on an ETDRS eye chart and the letters read equate to Snellen measurements. For example, if a participant reads between 84 and 88 letters, the equivalent Snellen measurement is 20/20.
12 months (1 year) after cataract surgery
Comparison of Intraretinal Fluid Cysts Between EVD Survivors and Controls From Baseline to 12 Months After Cataract Surgery
Aikaikkuna: Baseline to 12 months (1 year) after cataract surgery
Optical coherence tomography (OCT) imaging of the retina and optic nerve was used to identify the presence of intraretinal fluid cysts in EVD survivors vs. controls from baseline to 12 months after surgery
Baseline to 12 months (1 year) after cataract surgery
Comparison of Central Subfield Thickness (CST) Between EVD Survivors and Controls From Baseline to 12 Months After Cataract Surgery
Aikaikkuna: Baseline to 12 months (1 year) after cataract surgery
Optical coherence tomography (OCT) imaging of the retina and optic nerve was used to measure macular central subfield thickness (CST) in µm in EVD survivors vs. controls from baseline to 12 months after cataract surgery
Baseline to 12 months (1 year) after cataract surgery
Comparison of Central Subfield Thickness (CST) Between EVD Survivors and Controls, Excluding Cases of Intraretinal Fluid Cysts, From Baseline to 12 Months After Cataract Surgery
Aikaikkuna: Baseline to 12 months (1 year) after cataract surgery
Optical coherence tomography (OCT) imaging of the retina and optic nerve was used to measure central subfield thickness (CST) in µm in EVD survivors vs. controls, excluding cases of intraretinal fluid cysts, from baseline to 12 months after cataract surgery
Baseline to 12 months (1 year) after cataract surgery
Impact of Gender on Visual Acuity From Baseline to 12 Months After Surgery
Aikaikkuna: Baseline to 12 months (1 year) after cataract surgery
Visual acuity (20/x) was measured using the Tumbling-E Early Treatment Diabetic Retinopathy Study (ETDRS) protocol vision chart. Acuity is measured as letters read on an ETDRS eye chart and the letters read equate to Snellen measurements. For example, if a participant reads between 84 and 88 letters, the equivalent Snellen measurement is 20/20.
Baseline to 12 months (1 year) after cataract surgery
Impact of Gender on Improvement in the Number of Lines Read on an ETDRS Eye Chart From Baseline to 12 Months After Surgery
Aikaikkuna: Baseline to 12 months (1 year) after cataract surgery
Visual acuity was measured using the Tumbling-E Early Treatment Diabetic Retinopathy Study (ETDRS) protocol vision chart. Acuity is measured as letters read on an ETDRS eye chart and the letters read equate to Snellen measurements. Number of lines improvement equals the number of lines read at 12 months post cataract surgery minus the number of lines read at baseline
Baseline to 12 months (1 year) after cataract surgery
Impact of Age on Visual Acuity From Baseline to 12 Months After Surgery
Aikaikkuna: Baseline to 12 months (1 year) after cataract surgery
Age was age at enrollment in years. Visual acuity (20/x) was measured using the Tumbling-E Early Treatment Diabetic Retinopathy Study (ETDRS) protocol vision chart. Acuity is measured as letters read on an ETDRS eye chart and the letters read equate to Snellen measurements. For example, if a participant reads between 84 and 88 letters, the equivalent Snellen measurement is 20/20.
Baseline to 12 months (1 year) after cataract surgery
Impact of Age on Improvement in the Number of Lines Read on an ETDRS Eye Chart From Baseline to 12 Months After Surgery
Aikaikkuna: Baseline to 12 months (1 year) after cataract surgery
Age was age at enrollment in years. Visual acuity was measured using the Tumbling-E Early Treatment Diabetic Retinopathy Study (ETDRS) protocol vision chart. Acuity is measured as letters read on an ETDRS eye chart and the letters read equate to Snellen measurements. Number of lines improvement equals the number of lines read at 12 months post cataract surgery minus the number of lines read at baseline
Baseline to 12 months (1 year) after cataract surgery
Impact of Gender on Viral Persistence One Week Prior to Cataract Surgery
Aikaikkuna: One week prior to cataract surgery
Participants undergo aqueous fluid (aqueous humor) sampling to assess for the presence of Ebola virus RNA via RT-PCR using the GeneXpert assay.
One week prior to cataract surgery
Impact of Age on Viral Persistence One Week Prior to Cataract Surgery
Aikaikkuna: One week prior to cataract surgery
Age was age at enrollment in years. Participants undergo aqueous fluid (aqueous humor) sampling to assess for the presence of Ebola virus RNA via RT-PCR using the GeneXpert assay.
One week prior to cataract surgery

Yhteistyökumppanit ja tutkijat

Täältä löydät tähän tutkimukseen osallistuvat ihmiset ja organisaatiot.

Sponsori

Tutkijat

  • Päätutkija: Teresa M Magone de Quadros Costa, M.D., National Eye Institute (NEI)

Julkaisuja ja hyödyllisiä linkkejä

Tutkimusta koskevien tietojen syöttämisestä vastaava henkilö toimittaa nämä julkaisut vapaaehtoisesti. Nämä voivat koskea mitä tahansa tutkimukseen liittyvää.

Opintojen ennätyspäivät

Nämä päivämäärät seuraavat ClinicalTrials.gov-sivustolle lähetettyjen tutkimustietueiden ja yhteenvetojen edistymistä. National Library of Medicine (NLM) tarkistaa tutkimustiedot ja raportoidut tulokset varmistaakseen, että ne täyttävät tietyt laadunvalvontastandardit, ennen kuin ne julkaistaan ​​julkisella verkkosivustolla.

Opi tärkeimmät päivämäärät

Opiskelun aloitus (Todellinen)

Torstai 21. syyskuuta 2017

Ensisijainen valmistuminen (Todellinen)

Torstai 4. tammikuuta 2018

Opintojen valmistuminen (Todellinen)

Torstai 1. elokuuta 2019

Opintoihin ilmoittautumispäivät

Ensimmäinen lähetetty

Torstai 12. lokakuuta 2017

Ensimmäinen toimitettu, joka täytti QC-kriteerit

Torstai 12. lokakuuta 2017

Ensimmäinen Lähetetty (Todellinen)

Perjantai 13. lokakuuta 2017

Tutkimustietojen päivitykset

Viimeisin päivitys julkaistu (Todellinen)

Tiistai 29. kesäkuuta 2021

Viimeisin lähetetty päivitys, joka täytti QC-kriteerit

Maanantai 7. kesäkuuta 2021

Viimeksi vahvistettu

Tiistai 18. elokuuta 2020

Lisää tietoa

Tähän tutkimukseen liittyvät termit

Avainsanat

Muita asiaankuuluvia MeSH-ehtoja

Muut tutkimustunnusnumerot

  • 999917167
  • 17-EI-N167

Lääke- ja laitetiedot, tutkimusasiakirjat

Tutkii yhdysvaltalaista FDA sääntelemää lääkevalmistetta

Ei

Tutkii yhdysvaltalaista FDA sääntelemää laitetuotetta

Ei

Nämä tiedot haettiin suoraan verkkosivustolta clinicaltrials.gov ilman muutoksia. Jos sinulla on pyyntöjä muuttaa, poistaa tai päivittää tutkimustietojasi, ota yhteyttä register@clinicaltrials.gov. Heti kun muutos on otettu käyttöön osoitteessa clinicaltrials.gov, se päivitetään automaattisesti myös verkkosivustollemme .

Kliiniset tutkimukset Cataract surgery

Hae vastaavia kokeiluja