Neurodegeneration of retina in patiens with type 2 diadetes mellitus

Ruchkin, M. P.; Kuvshinova, E.R.; Федяшев, Г А; Маркелова, Е. В.

doi:10.34215/1609-1175-2020-3-62-64

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…Study of the composition of the tear fluid is used to determine the effect of local immunity on the development of eye diseases [4]. So the change in the content of various biologically active substances in the tear were found in patients with diabetic retinopathy had a correlation with its severity [5].…”

Section: Introductionmentioning

confidence: 99%

Content of mediators of innate immunity in the tears of patients with vascular and neurodegenerative manifestations of diabetic retinopathy

2023

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According to the results of recent studies, diabetic retinopathy can be considered not only as a vascular disease, but also as a neurodegenerative process. Study of the composition of the tear fluid is used to assess the state of local immunity in the development of eye diseases. However, studies examining the effect of tear composition in diabetic retinopathy are few. The aim of the study is to determine the levels of IL-1β, IL-10, TGF-β3, MMP-7, TIMP-2, protein S100b, BDNF and NGF in the tear fluid ofpatients with vascular and neurodegenerative manifestations of diabetic retinopathy. The study included 80 patients diagnosed with type 2 diabetes which were divided into 2 groups: the 1st group included 40 patients who had no clinical signs of diabetic retinopathy on the fundus; the 2nd group included 40 patients with initial signs of non-proliferative diabetic retinopathy. All those included in the study were examined on an optical coherent tomograph RTVue-100 (USA); the volume of focal losses of retinal ganglion cells (FLV) was determined. An increase in FLV above the normative base of the device was regarded as an OCT-sign of retinal neurodegeneration. According to the results of OCT, the participants of the first and second groups were additionally divided into 4 subgroups: 1A — patients without vascular changes in the fundus and without OCT signs of retinal neurodegeneration (n = 12); 1B — patients without vascular changes in the fundus and with the presence of OCT signs of retinal neurodegeneration (n = 28); 2A — patients with initial non-proliferative DR and without OCT signs of retinal neurodegeneration (n = 10); and 2B — patients with initial non-proliferative DR and with OCT signs of retinal neurodegeneration (n = 30). The levels of IL-1β, IL-10, TGF-β3, MMP-7, TIMP-2, protein S100 b, BDNF, and NGF in tear fluid were determined by enzyme-linked immunosorbent assay. Levels of IL-1β and IL-10 in tear fluid in all subgroups were comparable to controls throughout the study. TGF-β3 content in the tear fluid of patients in the group with initial signs of non-proliferative DR (group 2) was significantly (p = 0.001) lower compared with control and group 2. However, there was no significant difference (p > 0.05) between subgroups A and B within groups. The concentration of MMP-7 in the tear fluid in all subgroups was significantly lower than in the control (p < 0.05). However, in the subgroups with OCT signs of retinal neurodegeneration (1B and 2B), the deficiency of this metalloproteinase was more pronounced (p = 0.0001). The levels of the neuropeptides under study NGF, BDNF and S100 B in tear fluid did not differ from controls in all subgroups.

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Section: Introductionmentioning

confidence: 99%

Content of mediators of innate immunity in the tears of patients with vascular and neurodegenerative manifestations of diabetic retinopathy

2023

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Serum levels of cytokines in patients with retinal neurodegeneration in diabetic retinopathy on the background of type 2 diabetes mellitus

Markelova,

Ruchkin,

Fedyashev

2023

Cytokines and inflammation

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The aim of the present study was to determine the serum level of IL-1, TNF- IL-17A, INF-, IL-10 in patients with retinal neurodegeneration against the background of type 2 diabetes mellitus. The study included 80 patients with type 2 diabetes mellitus, which were divided into 4 groups depending on the presence of vascular symptoms of diabetic retinopathy and retinal neurodegeneration. The level of cytokines was determined using solid-phase ELISA. In groups of patients with retinal neurodegeneration, a significant (p0.05) increase in IL-1 and a decrease in IL-10 were detected. The presence of vascular changes in the retina did not affect the level of cytokines studied. The identified changes show the role of systemic imbalance between pro- and anti-inflammatory cytokines in the induction of retinal neurodegeneration in diabetic retinopathy. Further study of this problem is required in order to search for possible immune markers of retinal neurodegeneration in patients with type 2 diabetes.

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The role of innate immune system mediators in the development of retinal neurodegeneration in type 2 diabetes mellitus

Ruchkin

Просекова

Fedyashev

et al. 2022

Rossijskij oftalʹmologičeskij žurnal

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Purpose. To detect the levels of transform growth factors-β (TGF- β1, TGF- β2, TGF- β3), interferon-ʏ (INF- ʏ), matrix metalloproteinase-9 (MMP-9) and S100B protein in blood serum of patients with type 2 diabetes mellitus (DM) and to reveal the connection of these factors with neurodegenerative changes in the retina. Material and methods. 30 patients, averagely aged 60.3, with type 2 DM and no signs of diabetic retinopathy (DR) (the main group) and 30 healthy individuals (control group) were examined using microperimetry and optical coherence tomography. A sandwich variance estimator of solid phase enzyme-linked immunosorbent assay was used to determine the levels of TGF- β 1, TGF- β2, TGF- β3, INF- ʏ, ММР-9 and S100B protein in blood serum of the subjects examined. Results. The patients with type 2 DM were found to experience an increased level of focal loss of retinal ganglion cells and a drop in the average photosensitivity of the retina. The main group also showed a reliable increase in the level of S100B protein and in the serum level of MMP-9 against the control, but no significant difference between the groups was found in the level of TIMP-1. The level of TGF- β2 was significantly higher in the main group, which also showed a deficiency of TGF- β3. No significant difference was found between the two groups in the levels of TGF- β1 or INF- ʏ. In contrast, a positive correlation was revealed between the levels of S100B, MMP-9 and the volume of focal loss of retinal ganglion cells. Conclusion. Patients with type 2 DM and signs of neurodegeneration of the retina reveal a higher activity of some cytokines and MMP-9. This may indicate an important role of neuroinflammation and dysfunction of the immune system in the retinal neurodegeneration process of DM patients. Further research of other cytokins is required to determine early and more sensitive markers of retinal neurodegeneration.

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Neurodegeneration of retina in patiens with type 2 diadetes mellitus

Cited by 4 publications

References 8 publications

Content of mediators of innate immunity in the tears of patients with vascular and neurodegenerative manifestations of diabetic retinopathy

Content of mediators of innate immunity in the tears of patients with vascular and neurodegenerative manifestations of diabetic retinopathy

Serum levels of cytokines in patients with retinal neurodegeneration in diabetic retinopathy on the background of type 2 diabetes mellitus

The role of innate immune system mediators in the development of retinal neurodegeneration in type 2 diabetes mellitus

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