NCT04213313

Association Between SNP of SP-D and Susceptibility and Prognosis of Infectious Keratitis

Consecutive, Case Control Study of Association Between Single Nucleotide Polymorphism of SP-D and Susceptibility and Prognosis of Infectious Keratitis

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 145 (actual)
• Sponsor: Second Affiliated Hospital, School of Medicine, Zhejiang University · Academic / Other
• Sex: All
• Age: 18 Years – 75 Years
• Healthy volunteers: Accepted

Summary

This study explores the association between single nucleotide polymorphism (Met11Thr) of surfactant protein D(SP-D) and susceptibility and prognosis of infectious keratitis.Met11Thr of SP-D of patients with keratitis and normal controls were compared.Allele and genotype frequencies of patients with keratitis and normal controls were determined by polymerase chain reaction with sequence specific primers(PCR-SSPs) .SP-D gene polymorphism of patients with keratitis and normal controls was detected by Sanger sequencing

Detailed description

Surfactant protein D(SP-D) plays an important role in the innate immune system of the eye in the lacrimal duct, cornea and conjunctiva.The single lipopolysaccharide on the surface of bacteria and the receptors on the surface of immune cells are linked by SP-D ,which acts as a bridge to neutralize viruses in the innate immune defense system and assists other immune cells in clearing bacteria and fungi.SP-D can also participate in the acquired immune response after combining with lipopolysaccharide on the surface of microorganisms.Some single nucleotide polymorphisms of SP - D can not only affect the plasma level of SP - D, which leads to the differences of pathogen defense capability, but also can affect the space configuration and structure of carbohydrate recognition domain of SP-D, causing the change of ability of SP - D combined with pathogens to influence its defensive role.The concentration of SP - D in ocular surface is closely related to the occurrence and progression of infectious keratitis.Association between single nucleotide polymorphisms of SP-D and the occurrence and development of infectious keratitis has yet to be confirmed by research.

Conditions

• Infectious Keratitis

Interventions

Type	Name	Description
DRUG	Treatment of bacterial keratitis	0.3% Levofloxacin Eye Drops or 0.3% Tobramycin Eye Drops QID
DRUG	Treatment of fungal keratitis	1% Fluconazole Eye Drops or 0.25% Amphotericin B Eye Drops QID
DRUG	Treatment of viral keratitis	0.1% Acyclovir eye drops QID ，Ganciclovir gel QN，Famiclovir tablets 0.25g TID
DIAGNOSTIC_TEST	corneal scraping	culture and sensitivity of corneal ulcerated infiltrating edge tissue
OTHER	Sequencing	polymerase chain reaction with sequence specific primers(PCR-SSP) and Sanger sequencing

Timeline

• Start date: 2016-10-01
• Primary completion: 2018-06-30
• Completion: 2019-06-30
• First posted: 2019-12-30
• Last updated: 2020-01-07

Locations

1 site across 1 country: China