Serum Leptin, Adiponectin and Tumor Necrosis Factor-α in Hyperlipidemic Rats with/without Concomitant Diabetes Mellitus

Granuloma annulare (GA) is a form of noninfectious skin granuloma, first described in 1895 as a rash in the form of a ring (annular), with regular, rounded edges. Around 50% of the cases are cured spontaneously within 2 years, however, a percentage of patients suffer from recurrent lesions or persistence for years. The pathogenesis of GA lesions is not well understood, with studies linking its expression to the presence of histocompatibility genes (HLA)-Bw35 or AH8.1 allele. These genes are related to the production of TNF-α (Tumor Necrosis Factor-α) by mononuclear cells. The pathogenesis includes the migration of macrophages to the dermis, the presence of cytokines, late hypersensitivity reaction, defects in regulating the neutrophil chemotaxis and degradation of the connective tissue. Its outbreak may be linked to predisposing factors, such as diabetes mellitus, thyroid changes and viral infectious diseases. The macrophages present in GA lesions may receive stimuli that result in its modulation to M1 or M2 activation patterns. The study of the M1 and M2 modulation mechanism in the lesion is important for an understanding of GA development. Keywords: Granuloma Annulare. Macrophage. Immunology. Pathogenesis and Modulation. Resumo O Granuloma Anular (GA) é um tipo de granuloma cutâneo não infeccioso, que foi descrito em 1895, como uma exantema em formato de anel (anular), de bordas regulares e arredondadas. Cerca de 50% dos casos têm cura espontânea em 2 anos, mas parte dos pacientes apresentam recidivas das lesões ou persistência por anos. A patogênese das lesões do GA é pouco conhecida. Estudos relacionam sua expressão à presença de genes de histocompatibilidade (HLA)-Bw35 ou AH8.1, que são relacionados à produção de TNF-α (Tumor necrosis factor - α), pelas células mononucleares. A patogênese também inclui migração de macrófagos para derme, presença de citocinas, reação de hipersensibilidade tardia, defeito na quimiotaxia de neutrófilos e degradação do tecido conectivo. O surgimento das lesões pode estar associado a fatores predisponentes, como diabetes mellitus, alterações tireoidianas e doenças infecciosas virais. Os macrófagos presentes nas lesões de GA podem sofrer estímulos que acarretem sua modulação para os padrões de ativação M1 ou M2. O estudo de tais mecanismo de modulação é importante para a compreensão da instalação e desenvolvimento do GA nos pacientes afetados. Palavras-chave: Granuloma Anular. Macrófagos. Modulação. Imunologia e Patogênese.

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Immunological aspects of pathogenesis of metabolic syndrome-related arterial hypertension

Kazan medical journal ◽

10.17816/kmj1505 ◽

2014 ◽

Vol 95 (3) ◽

pp. 322-325 ◽

Cited By ~ 1

Author(s):

A F Salikhova

Keyword(s):

Metabolic Syndrome ◽

Tumor Necrosis Factor ◽

Arterial Hypertension ◽

Immunoglobulin G ◽

Interleukin 6 ◽

Tumor Necrosis ◽

Tumor Necrosis Factor Α ◽

Serum Leptin ◽

Factor Α ◽

Necrosis Factor

Aim. To analyze the link between levels of adipocytokines (leptine), non-specific cytokines (interleukin-6, tumor necrosis factor-α) and arterial hypertension. Methods. 123 subjects, including 100 patients with metabolic syndrome (according to 2005 Criteria of International Diabetes Federation) and 23 healthy subjects, were examined. General examination was performed, body weight, height and waist circumference were measured, body mass index was calculated. Following laboratory test were performed: serum leptin, interleukin-6, tumor necrosis factor-α, main classes of immunoglobulin, C-reactive protein levels were measured. Results. In patients with metabolic syndrome, increased body weight was associated with increased risk of arterial hypertension. A 10-fold increase of serum leptin level (44.69±8.96 ng/ml) compared to healthy controls (4.72±1.33 ng/ml, p 0.01), was revealed. Leptin level elevation was strongly associated with increased body mass index (r=0.77; p 0.001). Tumor necrosis factor-α concentration in patients with metabolic syndrome exceeded 2 pg/ml, while in healthy controls it didn’t reach this level. Interleukin-6 level was elevated in patients with metabolic syndrome (7.32 [3.25; 7.17] pg/ml) compared to controls (1.53 [1.19; 2.49] pg/ml, Fisher’s exact test, p 0.001). Examination of immunoglobulin levels in patients with metabolic syndrome revealed decreased serum level of immunoglobulin E (97.12±66.24 IU/ml) compared to controls (60.47±19.04 IU/ml, p=0.01). Concentration of immunoglobulin G in patients with metabolic syndrome was also higher (14.61±3.50 g/l) compared to controls (12.57±2.07 g/l, p=0.009). Increased interleukin-6 and immunoglobulin G levels were associated with presence of arterial hypertension. Conclusion. Increased interleukin-6 and immunoglobulin G might be an important factor for arterial hypertension onset and progression.

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Low Levels of Tumor Necrosis Factor-α will Prevent Periodontitis Exacerbation in Type 2 Diabetes Mellitus

European Journal of Dentistry ◽

10.1055/s-0041-1739442 ◽

2022 ◽

Author(s):

Titiek Berniyanti ◽

Gilang Rasuna Sabdho Wening ◽

Retno Palupi ◽

Dini Setyowati ◽

Cindy Ramadhan Putri

Keyword(s):

Diabetes Mellitus ◽

Tumor Necrosis Factor ◽

Tumor Necrosis ◽

Tumor Necrosis Factor Α ◽

Treatment Needs ◽

Type 2 Dm ◽

Tnf Α ◽

Factor Α ◽

Necrosis Factor

Abstract Objectives Diabetes mellitus (DM) is a major risk factor for periodontitis. Susceptibility to periodontitis increases approximately three times in people with DM. There is a clear relationship between the degree of hyperglycemia and the severity of periodontitis. This study aimed to analyze the reduction of tumor necrosis factor-α (TNF-α) in diabetics who came for periodontitis examination to prevent exacerbations. Materials and Methods This was an analytic observational study using a cross-sectional approach at health centers in Surabaya, Indonesia. Measurement of periodontal status used the community periodontal index of treatment needs by measuring bleeding at probing and pocket depth. TNF-α was measured using enzyme-linked immunosorbent assay, and behavior and lifestyle using a questionnaire. Statistical Analysis The Kolmogorov–Smirnov test was performed to identify data normality (p < 0.05). A nonparametric test was used to measure the degree of association between different characteristics and the incidence of periodontitis in type 2 DM patients with and without periodontitis. Spearman's test was done to examine the correlation between TNF-α level and severity of periodontitis in diabetics. The significant level was at p <0.05. Results There was a correlation between age, predisposing factors, reinforcing factors, drug consumption, and TNF-α levels in patients with type 2 DM and the incidence of periodontitis. Conclusions Poor glycemic control can induce oxidative stress on the gingiva, thereby aggravating damage to periodontal tissue. An important factor in preventing periodontitis for type 2 DM patients is controlling blood sugar levels through regular consumption of drugs and regular maintenance of oral cavity health. Knowledge is a predisposing factor that affects adherence of people with type 2 DM to consuming drugs regularly, which can be strengthened by family support. These will ultimately play a role in reducing TNF-α levels.

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