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Tsilivakos V.,Locus Medicus S.A. | Gerofotis A.,Aristotle University of Thessaloniki | Dalavitsou V.,Immunology and Immunotherapy Center | Vassilaki A.,Immunology and Immunotherapy Center | Daniilidis M.,Aristotle University of Thessaloniki
American Journal of Reproductive Immunology | Year: 2011

Problem A high percentage of women schoolteachers having fertility problems were observed by three independent teams. Method Expected percentage of educators was calculated in 4650 sub-fertile women and 2,062,891 women at reproductive age. To explore the possibility that schoolteachers' contact with childhood viral infections results in alterations of peripheral blood natural killer (NK) cells, a multiple linear regression analysis for profession, age, difficulty to conceive, number of abortions/implantation failures (predictor variables) was performed in childless educators (210) and housewives (184). Results The difference between observed and expected percentage of sub-fertile schoolteachers was statistically significant (17.6% vs 6.86%, P<0.0001). The mean percentage of PB NK cells was slightly higher in educators compared to housewives (12.48% vs 11.56%, P=0.10), and the multiple linear regression analysis revealed that the profession (schoolteacher or not) was the only predictive variable for higher NK% values (P=0.044). Conclusion Teachers' sub-fertility appears as an 'occupational disease'. Τhe possibility that results from their exposure to childhood viral infections has to be further explored. © 2010 John Wiley & Sons A/S.


PubMed | Locus Medicus SA, Diabetes Center, National and Kapodistrian University of Athens and Mellitus
Type: Journal Article | Journal: Hormones (Athens, Greece) | Year: 2014

Endothelial progenitor cells (EPCs) have recently been considered as a potential novel marker of vascular integrity, atherosclerosis and cardiovascular risk. This study was performed to investigate the main determinants of EPC levels in individuals with prediabetes.Thirty-nine participants with newly diagnosed prediabetes were enrolled. Flow cytometric analysis was used to quantify EPCs (CD34+CD133+VEGFR-2+). Traditional risk factors, high-sensitivity C-reactive protein (hs-CRP), homeostasis model assessment of insulin resistance (HOMA-IR) and anthropometric parameters, including ultrasonographic-determined visceral and subcutaneous fat, were recorded.In univariate analysis, EPC levels significantly correlated with waist circumference (p=0.017), mean arterial pressure (p=0.009), total cholesterol (p=0.003), hs-CRP (p=0.006), HOMA-IR (p=0.031) and visceral fat (p=0.040). However, in stepwise multivariate ordinal logistic regression analysis, only visceral fat retained its statistical significance (OR=0.79, 95%Cl:0.64-0.98, p=0.032).Visceral fat seems to be the main determinant of EPC levels in individuals with prediabetes and to form a plausible link between mild metabolic abnormalities, cardiovascular risk and vascular homeostasis process.


Angelidi A.,Tzaneio General Hospital of Piraeus | Melidonis A.,Tzaneio General Hospital of Piraeus | Protopsaltis I.,Tzaneio General Hospital of Piraeus | Sergentanis T.N.,National and Kapodistrian University of Athens | And 7 more authors.
Hormones | Year: 2014

Objective: Endothelial progenitor cells (EPCs) have recently been considered as a potential novel marker of vascular integrity, atherosclerosis and cardiovascular risk. This study was performed to investigate the main determinants of EPC levels in individuals with prediabetes. Design: Thirty-nine participants with newly diagnosed prediabetes were enrolled. Flow cytometric analysis was used to quantify EPCs (CD34+CD133+VEGFR-2+). Traditional risk factors, high-sensitivity C-reactive protein (hs-CRP), homeostasis model assessment of insulin resistance (HOMA-IR) and anthropometric parameters, including ultrasonographicdetermined visceral and subcutaneous fat, were recorded. Resu Lts: In univariate analysis, EPC levels significantly correlated with waist circumference (p=0.017), mean arterial pressure (p=0.009), total cholesterol (p=0.003), hs-CRP (p=0.006), HOMA-IR (p=0.031) and visceral fat (p=0.040). However, in stepwise multivariate ordinal logistic regression analysis, only visceral fat retained its statistical significance (OR=0.79, 95%Cl:0.64-0.98, p=0.032). ConclusIons: Visceral fat seems to be the main determinant of EPC levels in individuals with prediabetes and to form a plausible link between mild metabolic abnormalities, cardiovascular risk and vascular homeostasis process.


Michou V.,Locus Medicus SA | Michou V.,National and Kapodistrian University of Athens | Liarmakopoulou S.,Diagnosi IVF | Thomas D.,National and Kapodistrian University of Athens | And 5 more authors.
Andrologia | Year: 2012

Studies have documented the presence of herpes viruses in semen. The aim of our study was to determine whether they persist in semen samples following two-density gradient centrifugation for IVF purposes. Semen samples were collected from 109 men seeking fertility evaluation, prior to IVF treatment. Routine semen analysis was performed according to WHO guidelines. Each sample was treated in a two-density gradient centrifugation using PureSperm (PS). Both untreated and treated samples were screened for the presence of herpes viruses, using PCR. Kruskal-Wallis, chi-square and binomial statistical tests were used; P≤0.05 was considered statistically significant. No statistically significant associations were observed between semen parameters and viral presence. Viral DNA was detected in 54% of semen samples: HSV1/2 in 32 samples, EBV in 49, CMV in 47, HHV6 in 9, HHV7 in 4 and VZV in none. PS gradient failed to remove CMV in 89.36%, HSV1/2 in 59.38% and EBV in 22.45% of samples, while HHV6 and 7 were completely removed. Especially HSV1/2 and CMV seem to persist even following PS treatment. These observations indicate the possible risk of oocyte becoming infected during insemination, by IVF or intracytoplasmic sperm injection, with unknown sequelae. Further studies are required to determine whether any correlation exists between their presence, implantation rate and the outcome of pregnancy. © 2011 Blackwell Verlag GmbH.


Poulakis N.,Locus Medicus S.A. | Gritzapis A.D.,Laboratory of Cellular Biology and Immunology | Ploussi M.,Laboratory of Cellular Biology and Immunology | Leventopoulos M.,Laboratory of Cellular Biology and Immunology | And 6 more authors.
Cytometry Part B - Clinical Cytometry | Year: 2016

Background Early secreted antigenic target 6 (ESAT-6) is a virulent factor of Mycobacterium tuberculosis (MTB). The identification of intracellular (i/c) ESAT-6 in host cells would be a direct marker of MTB infection. We developed a method to detect i/cESAT-6 by flow cytometry. The aim of this study is to investigate the expression of i/cESAT-6 in the host cells of individuals with MTB infection. Methods The expression of i/cESAT-6 was examined in the blood of 58 active TB patients, in 10 naïve to TB infection controls, in 17 patients who completed anti-TB treatment, and in 56 close contacts with an index TB case. Additionally, it was examined in the sputum of 12 active TB patients. Results The i/cESAT-6 was positively detected in the blood of 52 out of 58 (90%) active TB patients. All naïve to TB infection controls were negative. Three out of 17 (18%) patients at the end of anti-TB treatment were positive. Twenty-six out of 56 (46%) close contacts tested positive. The i/cESAT-6 was detected in all culture positive TB sputum specimens. Conclusions The i/cESAT-6 is a promising biomarker of MTB infection that could be used in the evaluation of active TB patients and in the diagnosis of latent TB infection. Further studies are needed to validate its potential diagnostic role. © 2014 International Clinical Cytometry Society.


PubMed | Locus Medicus SA
Type: Journal Article | Journal: Andrologia | Year: 2012

Studies have documented the presence of herpes viruses in semen. The aim of our study was to determine whether they persist in semen samples following two-density gradient centrifugation for IVF purposes. Semen samples were collected from 109 men seeking fertility evaluation, prior to IVF treatment. Routine semen analysis was performed according to WHO guidelines. Each sample was treated in a two-density gradient centrifugation using PureSperm (PS). Both untreated and treated samples were screened for the presence of herpes viruses, using PCR. Kruskal-Wallis, chi-square and binomial statistical tests were used; P 0.05 was considered statistically significant. No statistically significant associations were observed between semen parameters and viral presence. Viral DNA was detected in 54% of semen samples: HSV1/2 in 32 samples, EBV in 49, CMV in 47, HHV6 in 9, HHV7 in 4 and VZV in none. PS gradient failed to remove CMV in 89.36%, HSV1/2 in 59.38% and EBV in 22.45% of samples, while HHV6 and 7 were completely removed. Especially HSV1/2 and CMV seem to persist even following PS treatment. These observations indicate the possible risk of oocyte becoming infected during insemination, by IVF or intracytoplasmic sperm injection, with unknown sequelae. Further studies are required to determine whether any correlation exists between their presence, implantation rate and the outcome of pregnancy.

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