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Completed

NCT Number: NCT03949244

Nailfold Capillary Blood Flow With Latanoprost Bunod

The purpose of this study is to look at the relationship of small blood vessels irregularities observed with an imaging system called video nailfold capillaroscopy in people with primary open-angle glaucoma. Nailfold capillaroscopy (NFC) is a video camera with a magnifying lens used for studying the movement of blood in small blood vessels. It is simple, safe and does not penetrate the skin. The skin fold that is at the tip of the finger is called the "nailfold". NFC has been used to assess blood vessel narrowing in patients with glaucoma.

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Key information

Conditions

Glaucoma, Open-Angle Eye Diseases Glaucoma Ocular Hypertension

Age range

40 year–80 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

Primary location

New York Eye and Ear Infirmary of Mount Sinai

New York, 10003, United States

About this study

In this study, the study team investigates the effect of topically-applied latanoprostene bunod (LTB) on the blood flow at the nailfold of the 4th finger in patients with primary open angle glaucoma. LTB is a new anti-glaucoma eye drop which received FDA clearance in early November 2017. It has two components: the prostaglandin analog (PGA) which decreases intraocular pressure (IOP) by enhancing the drainage of the aqueous (the fluid in the front part of the eye) from the eye, and the nitric oxide (NO) moiety which naturally dilates arteries in the body. The capillaries at the nailfold are comparable to those of the optic nerve head, which makes them a reasonable surrogate for evaluation of the effect of LTB on the blood flow. Therefore, this study may provide indirect evidence for the beneficial effect of LTB on blood flow to optic nerve which can potentially save the optic nerve from glaucomatous damage. Primary open angle glaucoma is a progressive condition and is the most common cause of irreversible blindness worldwide. Primary open angle glaucoma (POAG) is a subset of the glaucomas defined by an open, normal appearing anterior chamber angle and raised intraocular pressure (IOP), with no other underlying disease.

In addition to LTB, the study team will use latanoprost (L), an-FDA approved PGA anti-glaucoma eye drop and normal saline (NS: the physiologic solution composed of 0.9% salt and water), as controls to make sure the effects of LPB on nail fold capillary blood flow is not due to its PGA (as L is) or due to the placebo effect (as NS is).

This study may also serve as background information for the development of new anti-glaucoma medications which can be injected into the eye to facilitate blood flow to the optic nerve.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 40 years old to 80 years old
  • All participants will have open angles and no signs of secondary glaucoma such as exfoliation syndrome
  • Untreated intraocular pressure (IOP) may be ≤ 21mmHg or ≥ 21mmHg in both eyes
  • The cup-to-disc ratio (CDR) ≥ 0.6 in both eyes and CDR asymmetry ≤ 0.2.
  • POAG patients will have reliable Humphrey Visual Field (HVF) loss consistent with optic nerve damage
  • POAG patients can have any stage of POAG and be on any form of treatment for their disease.
  • Willingness to sign informed consent and comply with study procedures.

Exclusion criteria

  • History of non-POAG forms of glaucoma
  • Pregnancy
  • Inability to give informed consent

Treatment and study plan

Latanoprost 0.005%

Drug

Latanoprost 0.005% will be applied to the nailfold and images of the blood flow in the nailfold capillaries will be acquired.

Other names: Xalatan

Latanoprost bunod 0.024%

Drug

Latanoprost bunod 0.024% will be applied to the nailfold and images of the blood flow in the nailfold capillaries will be acquired.

Other names: Vyzulta, LTB

normal saline 0.9%

Drug

Normal saline 0.9% will be applied to the nailfold and images of the blood flow in the nailfold capillaries will be acquired.

Nailfold capillaroscopy

Diagnostic Test

An imaging system and does not penetrate the skin. A video camera with a magnifying lens used for studying the movement of blood in small blood vessels at the nailfold of the 4th finger.

Other names: NFC

Primary outcomes

  1. NFC Blood Flow at Baseline and 15 Minutes

    Time frame: baseline and 15 minutes

    NFC blood flow at baseline and at 15 minutes after NF application to the 4th digit of the nondominant hand.

Sponsors and collaborators

Lead sponsor

Icahn School of Medicine at Mount Sinai

Other

Registry information

Official study title

Effect of Nailfold Application of Latanoprostene Bunod on Nailfold Capillary Blood Flow

Important dates

Study start
2019
Primary completion
2020
Study completion
2020
First posted
May 14, 2019
Registry last updated
Sep 29, 2021

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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