Isotretinoin does not alter VEGF-A and VEGF-C levels: do retinoids behave differently in dose-dependent and/or in vivo/in vitro conditions?

BACKGROUND: It is seen that various forms of retinoids have different results on VEGF-A and VEGF-C levels when tested at different dosages, in different diseases and under different conditions such as in vivo or in vitro. OBJECTIVE: To evaluate the effects of isotretinoin on VEGF-A and VEGF-C levels in humans. METHODS: Blood samples at the third month of the patient group and blood samples of the control group were compared in terms of VEGF-A and VEGF-C concentrations. RESULTS: No statistically significant difference was observed between the patient group and the control group in terms of VEGF-A and VEGF-C levels. LIMITATIONS: Most of the patients discontinued treatment and could not reach the required number, the study was converted to case-control. CONCLUSIONS: We think that 0.5 mg/kg/day isotretinoin has no effect on blood concentrations of VEGF-A and VEGF-C in humans. Therefore, there is a need for studies using isotretinoin in different doses and durations in humans in order to better evaluate its effects.

Kidney Injury Molecule Levels in Type 2 Diabetes Mellitus.

BACKGROUND: This study was designed to determine the diagnostic role of urinary kidney injury molecule (KIM)-1 levels in renal damage in patients with type 2 diabetes mellitus according to the urinary albumin/creatinine ratio. METHODS: Patients with type 2 diabetes mellitus admitted to different polyclinics in our hospital enrolled in the study and were subdivided into three groups according to albumin/creatinine ratio - normalbuminuric (n: 20); microalbuminuric (n: 20); albuminuric (n: 18) - and compared with the control group. Urine albumin was analyzed using the immunoturbidimetric method (Architect C16000, Abbott Diagnostics). uKIM-1 was determined using a commercially available enzyme-linked immunosorbent assay test kit (USCN Life Science, Hankou, Wuhan, China). One-sample Kolmogorov-Smirnov test, Spearman correlation and Kruskal-Wallis non-parametric tests were performed. Post hoc comparisons were made using Bonferroni-corrected Mann-Whitney U tests. RESULTS: The differences between the controls and normalbuminuric, microalbuminuric and albuminuric groups were highly significant for KIM-1. Positive correlation was found between KIM-1 and urine microalbumin-urine microalbumin/creatinine (r = 0.479 P < 0.001; r = 0. 400, P < 0.001; respectively). CONCLUSION: In our study, KIM-1 levels were significantly different suggesting that urinary KIM-1 levels may be an early marker in patients with diabetic nephropathy. J. Clin. Lab. Anal. 00:1-6, 2016.

Exciton binding energy and nonhydrogenic Rydberg series in monolayer WS(2).

We have experimentally determined the energies of the ground and first four excited excitonic states of the fundamental optical transition in monolayer WS_{2}, a model system for the growing class of atomically thin two-dimensional semiconductor crystals. From the spectra, we establish a large exciton binding energy of 0.32 eV and a pronounced deviation from the usual hydrogenic Rydberg series of energy levels of the excitonic states. We explain both of these results using a microscopic theory in which the nonlocal nature of the effective dielectric screening modifies the functional form of the Coulomb interaction. These strong but unconventional electron-hole interactions are expected to be ubiquitous in atomically thin materials.

The relationship between nutrition and micronutrients in healthy Turkish infants and young children.

BACKGROUND: A healthy diet is important at every stage of life. We aimed to determine the serum vitamin D and iron, folic acid, and vitamin B12 levels in healthy children younger than 48 months and to investigate the relationship between nutrition and micronutrients in children of this age. METHODS: In this observational study children who presented to the Pediatrics Clinic of our hospital during the period 2015-2022 were included. Vitamin D and other nutritional parameters (serum folate, vitamin B12, iron, ferritin) were evaluated from the study participants' serum samples during the outpatient clinic visit (jaundice check-up, pre-circumcision surgery, etc.). RESULTS: Overall, 766 cases were included in the study. Vitamin D was higher in the group that was fed only breast milk (p = 0.019), and vitamin D insufficiency was statistically higher in the formula group (p = 0.015). Hemoglobin levels were significantly higher in the formula group (p = 0.007). The folic acid level was found to be normal in all infants, and was higher in formula-fed infants (p = 0.012). Vitamin B12 was found to be significantly higher in infants fed with formula (p = 0.001). Vitamin D deficiency was most common in infants aged 25-48 months (p < 0.001). Similarly, vitamin D insufficiency (12-20 ng/mL) was detected in infants aged between 25 and 48 months (p < 0.001). CONCLUSION: Micronutrients such as calcium, folic acid, iron, vitamin D, and iodine are critical in early fetal development from pregnancy onward. It is vital to raise awareness of this issue for mothers, starting from pregnancy, and for mothers to feed their babies more carefully in the first years of life.

Human Papillomavirus Infection (HPV) Prevalence in the Black Sea Region of Turkey: Primary HPV Screening for Cervical Cancer.

OBJECTIVE: Planning vaccination and treatment options requires knowledge about the regional incidence of human papillomavirus infection (HPV) and its genotypes. The aim of our study was to determine the regional prevalence of HPV with genotypic subclassification and to evaluate the efficacy of HPV testing in cervical screening.  Material and Method: This retrospective cohort study analyzed records of 10,152 women aged 30-65 from the On Dokuz Mayis University Medical Faculty's Gynecology Clinic, excluding those with a history of cervical disease, hysterectomy, or current pregnancy. Pre- and postmenopausal and total HPV prevalence were calculated. There was a total of 544 patients who underwent a colposcopic biopsy after cervical screening. The research focused on comparing the efficacy of Pap smears, HPV tests, and co-tests in detecting LSIL or more severe conditions, utilizing the BD Viper LT System for HPV screening and liquid-based cytology for smear tests. RESULTS: The prevalence of HPV in our region was determined to be 10.9%. When considering menopausal status, HPV prevalence was found to be 9.8% in premenopausal individuals and 12.4% in postmenopausal individuals. Evaluation of the pap smear results revealed a sensitivity of 74.8% for premenopausal and 81% for postmenopausal patients, with a specificity of 51% observed in both menopausal categories. In contrast, HPV testing demonstrated a sensitivity of 90.8% in premenopausal and 92.4% in postmenopausal individuals, with a specificity of 58% for both groups. The co-test results indicated an even higher sensitivity, with 97.9% in premenopausal and 100% in postmenopausal individuals, albeit with a reduced specificity of 28% in both cases. When identifying LSIL (low-grade squamous intraepithelial lesions) and more severe conditions, the sensitivity and specificity of the primary HPV test surpassed those of the pap smear. While the primary HPV test's sensitivity is markedly lower compared to the co-test, it boasts a significantly higher specificity. CONCLUSION: Regional HPV prevalence studies are valuable for the implementation of screening policies. The primary HPV DNA test is a reliable method for detecting preinvasive and invasive lesions in patients over 30 years of age.

Explaining the decline in coronary heart disease mortality in Turkey between 1995 and 2008.

BACKGROUND: Coronary heart disease (CHD) mortality rates have been decreasing in Turkey since the early 1990s. Our study aimed to determine how much of the CHD mortality decrease in Turkey between 1995 and 2008 could be attributed to temporal trends in major risk factors and how much to advances in medical and surgical treatments. METHODS: The validated IMPACT CHD mortality model was used to combine and analyse data on uptake and effectiveness of CHD treatments and risk factor trends in Turkey in adults aged 35-84 years between 1995 and 2008.Data sources were identified, searched and appraised on population, mortality and major CHD risk factors for adults those aged 35-84 years. Official statistics, electronic databases, national registers, surveys and published trials were screened from 1995 onwards. RESULTS: Between 1995 and 2008, coronary heart disease mortality rates in Turkey decreased by 34% in men and 28% in women 35 years and over. This resulted in 35,720 fewer deaths in 2008.Approximately 47% of this mortality decrease was attributed to treatments in individuals (including approximately 16% to secondary prevention, 3% angina treatments, 9% to heart failure treatments, 5% to initial treatments of acute myocardial infarction, and 5% to hypertension treatments) and approximately 42% was attributable to population risk factor reductions (notably blood pressure 29%; smoking 27%; and cholesterol 1%). Adverse trends were seen for obesity and diabetes (potentially increasing mortality by approximately 11% and 14% respectively). The model explained almost 90% of the mortality fall. CONCLUSION: Reduction in major cardiovascular risk factors explained approximately 42% and improvements in medical and surgical treatments explained some 47% of the CHD mortality fall. These findings emphasize the complimentary value of primary prevention and evidence-based medical treatments in controlling coronary heart disease.

Hepcidin as a predictor of disease severity in acute pancreatitis: a single center prospective study.

BACKGROUND/AIMS: Predicting the severity of acute pancreatitis is limited to clinical, laboratory and radiological risk factors. Hepcidin levels increase in acute inflammation. We aimed to assess the relationship between hepcidin and C-reactive protein (CRP), white blood cells (WBC) and multi-detector computerized tomography (MDCT) in predicting the severity of pancreatitis. METHODOLOGY: We undertook a prospective review of 59 consecutive patients with acute pancreatitis admitted to our clinic. Biochemical values were measured from blood samples taken within 2 hours of admission and from between 2 and 72 hours related to the time of symptom onset. RESULTS: In predicting severe acute pancreatitis, hepcidin was superior to CRP and WBC (Area Under the Curve (AUC)=0.79, p=0.003; AUC=0.69, p=NS; AUC=0.53, p=NS, respectively). CONCLUSIONS: In this study, hepcidin was found to be superior to CRP in predicting the severity of pancreatitis.

The Impact of Female Genital Mutilation on Sexual Function: A Study Conducted in Rural Sudan.

BACKROUND:  There are few studies comparing sexual function in women with female genital mutilation (FGM) in the literature, and most of these were evaluated with the Female Sexual Function Index (FSFI) questionnaire. Only one used the Female Genital Self-Image Scale (FGSIS) questionnaire. AIM: This study aims to evaluate the effects of FGM on sexual function in Sudanese women who did or did not undergo FGM, using the FSFI and FGSIS questionnaires. METHODS:  This descriptive study was conducted on Sudanese women from July 2020 to March 2021. Patients who attended to our hospital's gynecology outpatient clinic for health screening were included in this study. A total of 211 patients 113 with FGM and 98 without FGM were included in the study. The group with FGM was categorized according to the classification of the World Health Organization. The validated Arabic FSFI and FGSIS questionnaires were administered to groups with and without female genital mutilation and cutting (FGM/C). RESULTS: When the FGM types of the cases participating in the study were examined, patients with FGM were classified according to the FGM/C classification defined by the World Health Organization. They were classified as 20.4% (n=23) Type 1, 49.6% (n=56) Type 2, and 30.1% (n=34) Type 3. FSFI and FGSIS scores were significantly lower in the FGM/C group, especially in Type 3 with the highest tissue loss. The survey results statistically support the possibility of sexual dysfunction in FGM group. CLINICAL IMPLICATIONS: Female genital circumcision negatively affects sexual function. Therefore, clinicians should consider and sexual dysfunction in women with FGM attending primary care. Strengths and limitations: The strengths of this study are its originality, as it is the first study in the literature to use validated FGSIS and FSFI questionnaires together to assess sexual function in groups with and without FGM and to evaluate correlation of questionnaire results. We undertook the study it using validated and reliable scales, trained clinical staff, local staff gynecologist, and multivariate analysis. Limitation of the study is the chosen age range. The reason for limiting the age to under 35 is that we wanted to evaluate the more sexually active age group in our study. We cannot comment on the correlation of FSFI and FGSIS in circumcised patients over 35 years of age. CONCLUSION:  Sexual function and sexual self-image of women with FGM/C were found to be significantly lower compared to women without FGM when compared with the validated FSFI and FGSIS questionnaires.

Hysteroscopy-Guided Natural Orifice Repair of Isthmocele.

Isthmocele can be defined as a hypoechoic field within the lower uterine segment, indicating a discontinuation of the myometrium at the uterine scar of a previous cesarean section. Postmenstrual spotting, pelvic pain, dysmenorrhea, dyspareunia, uterine rupture, cesarean scar pregnancy, and secondary infertility could be seen as the complications of existing isthmocele. Such defects are prevalent with the increasing number of cesarean deliveries. A 39-year-old woman who had three prior cesarean sections complaining irregular uterine bleeding for 2 years was examined. A uterine scar defect was observed. A hysteroscopy-guided natural orifice approach was planned to repair the defect. The patient was discharged without any complication in her postoperative 6th h. She had no pain or irregular bleeding in her 2-week postoperative visit.

LX-8000R and UriSed 2 fully automated urine analyzers comparison to manual microscopic examination.

Background: Urinalysis has an important place in evaluating kidney and urinary tract infections. Automated urine analyzers enhance productivity and turnover in laboratories and economize time and labor required for analysis. In the present study, we evaluated and compared analytic and diagnostic performance of UriSed2 with LX-8000R, which is a novel image-based automated urine sediment analyzer. Methods: A total of 178 urine samples sent to our laboratory were evaluated by the two urine analyzers and standard manual microscopy. Precision and comparison studies were done in accordance with CLSI guidelines. Results: Sensitivity assessment revealed similar outcomes with both UriSed2 and LX-8000R devices for erythrocyte count (RBC), whereas UriSed2 device yielded higher outcomes for leukocyte count (WBC) and epithelial cells (EPI) than LX-8000R analyzer. Specificity of UriSed2 for WBC and RBC was higher than that of LX-8000R device. According to Gamma statistics, both urine analyzers showed perfect consistency for WBC, RBC and EPI cell counts. Manuel microscopy revealed statistically significant correlation between LX-8000R and UriSed2 in terms of WBC and RBC. Manual evaluation by Bland-Altman analysis demonstrated lower WBC and RBC values and higher EPI as compared to both UriSed2 and LX-8000R devices. As the result of Passing-Bablok regression analysis, both devices were found to be inconsistent with manual microscopy. Conclusions: We think that evaluation of automated urine analyzers will be more meaningful when they are evaluated together with urine samples and patient clinical findings in addition to comparing with manual microscopy.

Retinol Depletion in COVID-19.

Background and aims: COVID-19 has been a devastating pandemic. There are indications that vitamin A is depleted during infections. Vitamin A is important in development and immune homeostasis. It has been used successfully in measles, RSV and AIDS infections. In this study, we aimed to measure the serum retinol levels in severe COVID-19 patients to assess the importance of vitamin A in the COVID-19 pathogenesis. Methods: The serum retinol level was measured in two groups of patients: the COVID-19 group, which consisted of 27 severe COVID-19 patients hospitalized in the intensive care unit with respiratory failure, and the control group, which consisted of 23 patients without COVID-19 symptoms. Results: The mean serum retinol levels were 0.37 mg/L in the COVID-19 group and 0.52 mg/L in the control group. The difference between the serum retinol levels in the two groups was statistically significant. There was no significant difference in retinol levels between different ages and genders within the COVID-19 group. Comorbidity did not affect serum retinol levels. Conclusion: The serum retinol level was significantly lower in patients with severe COVID-19, and this difference was independent of age or underlying comorbidity. Our data show that retinol and retinoic acid signaling might be important in immunopathogenesis of COVID-19.

The Comparison of Surgical Outcomes following Laparoscopic Hysterectomy and vNOTES Hysterectomy in Obese Patients.

AIM: This study aimed to compare the surgical outcomes of total laparoscopic hysterectomy (TLH) and vaginally assisted natural orifice transluminal endoscopic surgery (vNOTES) hysterectomy procedures in obese patients. MATERIALS AND METHODS: This cross-sectional study was conducted with 83 obese women (BMI > 30 kg/m2) who underwent TLH (35 patients) or vNOTES hysterectomy (48 patients) for benign gynecological indications. The duration of surgery, intra/postoperative complications, intra- and postoperative hemoglobin (Hb) and hematocrit (Hct) levels, hospital stay, Visual analogue scale (VAS) scores at the postoperative 6th and 24th hours of the patients were compared. RESULTS: There was no significant difference between TLH and vNOTES groups regarding age (49 vs. 52 years, p = 0.35), parity (2 vs. 3, p = 0.17), and uterine weight (290 vs. 230 g., p = 0.13) The median BMI was 31.6 kg/m2 (30-42.2 kg/m2) in the TLH group and 31.9 kg/m2 (30-54.6 kg/m2) in the vNOTES group (p = 0.31). The vNOTES hysterectomy group had significantly shorter durations of surgery (67.5 vs. 136 min) and postoperative hospitalization than the TLH group (p < 0.05 for all comparisons). Besides, the 6th-hour (6 vs. 7, p = 0.02) and 24th-hour (4 vs. 3, p < 0.001) VAS scores were significantly lower in the vNOTES hysterectomy group. The propensity-matched group analysis showed significantly lower 6th-hour and 24th-hour VAS scores and shorter duration of surgery (80 vs. 135 min, p < 0.001) in the vNOTES hysterectomy group than the TLH group. CONCLUSION: vNOTES is a feasible technique in obese women who require a hysterectomy and provides favorable outcomes considering the shorter duration of surgery and postoperative hospitalization and lower pain scores.

Using cell banks as a tool in conservation programmes of native domestic breeds: the production of the first cloned Anatolian Grey cattle.

The aim of this study was to clone native Anatolian Grey cattle by using different donor cell types, such as fibroblast, cartilage and granulosa cells cryopreserved in a gene bank and oocytes aspirated from ovaries of Holstein cows as the recipient cytoplasm source. One male calf from fibroblast, three female calves from granulosa cells and one female calf from cartilage cells were born healthy and at normal birthweights. No calves were lost after birth. The results demonstrated that the cloned calves had the same microsatellite alleles at 11 loci as their nuclear donors. However, the mtDNAs of the five Anatolian Grey cloned calves had different haplotypes from their donor cells and mtDNA heteroplasmy could not be detected in any of the clones. The birth of healthy clones suggests that the haplotype difference between the cell and oocyte donor did not affect the pre- or post-implantation development of the bovine nuclear transfer derived embryos in our study. The results showed that well established nuclear transfer protocols could be useful in conserving endangered species. In conclusion, somatic cell banking can be suggested as a tool in conservation programmes of animal genetic resources.

Effect of isotretinoin (13-cis-retinoic acid) on levels of soluble VEGF receptors (sVEGFR1, sVEGFR2, sVEGFR3) in patients with acne vulgaris.

BACKGROUND/AIM: The effect of isotretinoin on soluble VEGFRs has not been previously investigated. This study evaluate the effects of isotretinoin (13-cis-retinoic acid) on soluble VEGFR1 (sVEGFR1), soluble VEGFR2 (sVEGFR2) and soluble VEGFR3 (sVEGFR3). METHODS: The study included 38 patients (28 females, 10 males) receiving systemic isotretinoin treatment and 38 healthy individuals (28 females, 10 males) with similar age and gender characteristics. The blood samples of the patient group at third months and blood samples of the control group were compared in terms of sVEGFR1, sVEGFR2 and sVEGFR3 concentrations. RESULTS: It was significant that sVEGFR1 was low and sVEGFR3 was high in patients receiving isotretinoin (p: .038, p: .021, respectively). There was no significant change in sVEGFR2 levels between the groups (p: .519). CONCLUSIONS: We think that the effect of isotretinoin on sVEGFR1, sVEGFR2 and sVEGFR3 may be secondary to its effects on the VEGF family. However, after clarifying the effect of isotretinoin on the VEGF family, we think that it can be used in some tumors and vascular diseases.

Toughening Mechanism Analysis of Recycled Rubber-Based Composites Reinforced with Glass Bubbles, Glass Fibers and Alumina Fibers.

Recycling of materials attracts considerable attention around the world due to environmental and economic concerns. Recycled rubber is one of the most commonly used recyclable materials in a number of industries, including automotive and aeronautic because of their low weight and cost efficiency. In this research, devulcanized recycled rubber-based composites are designed with glass bubble microsphere, short glass fiber, aluminum chip and fine gamma alumina fiber (γ-Al2O3) reinforcements. After the determination of the reinforcements with matrix, bending strength and fracture characteristics of the composite are investigated by three-point bending (3PB) tests. Halpin-Tsai homogenization model is adapted to the rubber-based composites to estimate the moduli of the composites. Furthermore, the relevant toughening mechanisms for the most suitable reinforcements are analyzed and stress intensity factor, KIc and critical energy release rate, GIc in mode I are determined by 3PB test with single edge notch specimens. In addition, 3PB tests are simulated by finite element analysis and the results are compared with the experimental results. Microstructural and fracture surfaces analysis are carried out by means of scanning electron microscopy (SEM). Mechanical test results show that the reinforcement with glass bubbles, aluminum oxide ceramic fibers and aluminum chips generally increase the fracture toughness of the composites.

Hysteroscopic Removal of Intrauterine-retained Suture Material Causing Pelvic Inflammatory Disease.

Retained intrauterine objects are rare causes of persistent vaginal discharge and pelvic inflammatory disease. Hysteroscopy is a minimally invasive technique used for removing these materials. A 47-year-old female who had recurrent vaginal discharge was admitted to our emergency department with pelvic pain. Retained nonabsorbable suture material was observed during her vaginal examination. After treating with intravenous antibiotics, operative hysteroscopy was performed, and the material was removed from the lower segment of the uterus.

Evaluation of anti-SARS-CoV-2 antibody levels: two different methods.

OBJECTIVE: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) disease (COVID-19) is still a major problem worldwide. Antibody response to SARS-CoV-2 has not yet been fully clarified, and clinical benefits of serological tests remain unclear. Despite the presence of numerous systems and methods used to analyze antibody levels, it is difficult to mention about standardization. This study aims to evaluate antibody levels of COVID-19 patients obtained by different methods. METHODS: Specimens of 55 patients were included in this study. Patients underwent SARS-CoV-2 real-time polymerase chain reaction test, COVID-19 IgM/IgG antibody rapid test (Hotgen), and Roche SARS-CoV-2 antibody test. RESULTS: In this study, the positive values of COVID-19 IgM/IgG antibody rapid test, Roche SARS-CoV-2 antibody test, and SARS-CoV-2 real-time polymerase chain reaction test were 37, 26, and 31, respectively, whereas the negative values were 18, 29, and 24, respectively. A comparison of the results using χ² test revealed a significant difference among SARS-CoV-2 real-time polymerase chain reaction, COVID-19 IgM/IgG antibody rapid test (Hotgen), and Roche SARS-CoV-2 antibody test. CONCLUSIONS: We recommend antibody testing in close contact tracing as well as in real-time polymerase chain reaction negative symptomatic subjects. Standardization is important as positive values show significant variations among antibody tests.

Educational intervention to improve appropriate digoxin therapeutic drug monitoring: a quasi-experimental study.

OBJECTIVES: Our previous retrospecive study evaluating the appropriateness of serum digoxin concentration (SDC) measurements revealed errors in the timing of blood specimen collection in 98% of the tests. The aim of this study is to evaluate the appropriateness of the SDC measurements and the factors involved in inappropriate test-ordering, after training health personnel in digoxin therapeutic drug monitoring. METHODS: This is a training-based quasi-experimental study. The residents and nurses of the Cardiology Clinic were trained first in December 2017, and refresher training courses were carried out every month throughout the study. The medical data of the inpatients receiving digoxin therapy were recorded prospectively, between January and December 2018. The appropriateness of the physicians' orders for SDC measurement was evaluated according to the criteria of the right indication and right timing of blood collection. The results are presented by descriptive statistics, Student's t-test and χ2 analysis. RESULTS: A total of 232 SDC tests were ordered for 121 patients (age: 71.0±12.6 years, 56.2% women). Of these orders,129 (55.6%) were considered appropriate: 205 (88.4%) for indication and 129 (62.9%) for blood collection timing. There was a significant correlation between inappropriate order for SDC test and the age of the patient, female gender, impairment of renal function tests, high levels of serum BNP and the number of medications used (P<0.005). CONCLUSIONS: Approximately a one-half decrease in inappropriate tests compared with our previous study results imply that education has a positive effect on physician behaviour. However, physicians' concerns due to increased risk factors for the patient still play a role in inappropriate test-ordering.