Diagnose Disease, Periodontitis
Conditions
Keywords
hypoxia, kynurenine, oxidative stress, periodontitis, tryptophan
Brief summary
The kynurenine pathway (KP), the primary route for tryptophan (TRP) metabolism, is activated during inflammation and hypoxic conditions, contributing to immune dysregulation and oxidative stress. the interconnected roles of hypoxia, KP activation, and oxidative stress in periodontitis have not been comprehensively investigated.The aim of this study was to determine the role of the kynurenine (KYN) pathway and hypoxia in periodontal inflammation, as well as their association with periodontal clinical parameters.
Detailed description
Systemically healthy 23 stage III, grade B periodontitis patients and 22 periodontally healthy individuals were included in this study. Salivary and serum tumor necrosis factor-alpha (TNF-α), hypoxia-inducible factor-1 alpha (HIF-1α) and 8-hydroxy-2'-deoxyguanosine (8-OhdG) levels were evaluated by ELISA, and salivary and serum KP metabolites were evaluated by liquid chromatography-mass spectrometry.
Interventions
Saliva were collected to analyze the selected markers as unstimulated samples during the early hours of the day. The saliva was centrifuged and then transferred into Eppendorf tubes. Venous puncture was performed after saliva collection and 10 mL of blood samples were collected by qualified staff (MFD) from each participant. Saliva and serum were then stored at -80 °C until analysis.
Sponsors
Ankara University
Istanbul Medipol University Hospital
Study design
Observational model
OTHER
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
* systemically healthy * clinical diagnosis of periodontitis * clinical diagnosis of periodontal health
Exclusion criteria
* decline to participate and being under 18 & over 65 years of age; * having any systemic inflammatory diseases such as diabetes, rheumatoid arthritis, or systemic conditions, including immunodeficiency syndrome, cardiovascular disorders, or hepatic disorders; * the use of antibiotics and/or anti-inflammatory nonsteroidal anti-inflammatory drugs within 3 months preceding the study; * having nonsurgical periodontal treatment (previous 6 months); * having surgical periodontal treatment (previous 12 months); * having \<20 natural teeth excluding the third molars.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Pocket probing depth | 3 months | Measurement of the depth of a sulcus or periodontal pocket determined by measuring distance from a gingival margin to the base of the sulcus or pocket with a calibrated periodontal probe |
| Clinical attachment level | 4 months | Clinical attachment level (or loss, CAL) is a more accurate indicator of the periodontal support around a tooth than probing depth alone. CAL is measured from a fixed point on the tooth that does not change, the CEJ. To calculate CAL, two measurements are needed: distance from the gingival margin to the CEJ and probing depth. In recession: probing depth (+) gingival margin to the CEJ (add). In tissue overgrowth: probing depth (-) gingival margin to the CEJ (subtract) |
| Bleeding on probing | 4 months | Bleeding on probing referring to bleeding that is induced by gentle manipulation of the tissue at the depth of the gingival sulcus, or interface between the gingiva and a tooth |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| serum and saliva analyses for selected molecules | 3 months | ELISA method was used for tumor necrosis factor-alpha (TNF-α), hypoxia-inducible factor-1 alpha (HIF-1α) and 8-hydroxy-2'-deoxyguanosine (8-OhdG) levels evaluation. KP metabolites were evaluated by liquid chromatography-mass spectrometry. |
Countries
Turkey (Türkiye)
Outcome results
None listed