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https://www.readbyqxmd.com/read/28729002/phosphenes-retinal-discrete-dark-noise-negative-afterimages-and-retinogeniculate-projection-a-review-of-a-new-explanatory-framework-based-on-endogenous-ocular-luminescence
#1
REVIEW
Vahid Salari, Felix Scholkmann, Ram Lakhan Pandey Vimal, Noémi Császár, Mehdi Aslani, István Bókkon
Cellular luminescence is the emission of photons by living cells due to various biophysical and biochemical processes, mostly associated with cellular metabolism. In this review paper we summarize today's understanding of four luminescence-dependent phenomena in the eye, i.e., phosphenes, retinal discrete dark noise, negative afterimages and the development of retinogeniculate projections in the brain. We review the phenomena above in the context of knowledge gained from experimental and theoretical works. Finally we discuss this knowledge in terms of its physiological significance...
July 17, 2017: Progress in Retinal and Eye Research
https://www.readbyqxmd.com/read/28728347/pros-and-cons-of-health-transformation-program-in-iran-evidence-from-financial-outcomes-at-household-level
#2
Enayatollah Homaie Rad, Vahid Yazdi-Feyzabadi, Shahrokh Yousefzadeh-Chabok, Abolhasan Afkar, Ahmad Naghibzadeh Tahami
Purpose: Health transformation program (HTP) is one of the recent reforms in health system of Iran implemented in early 2014. Improving the equity of payments and reducing out of pocket (OOP) and catastrophic health expenditures (CHE) were some of the program's important goals. In this study these goals were evaluated using a before-after analysis. Methods: Household income and expenditures data of Guilan province were gathered for years 2013-2015. OOP payments for outpatient, inpatient and drug services were calculated and the results were compared using propensity score matching technique after adjustment of confounding variables...
July 18, 2017: Epidemiology and Health
https://www.readbyqxmd.com/read/28724275/a-case-report-of-paraneoplastic-pemphigus-associated-with-retroperitoneal-inflammatory-myofibroblastic-tumor
#3
Kamran Balighi, Arghavan Azizpour, Ali Sadeghinia, Vahide Saeidi
Paraneoplastic pemphigus (PNP) is an autoimmune bullous disease associated with underlying neoplasms, both malignant and benign. The most constant clinical presentation of PNP is the presence of intractable stomatitis. Herein we present a 25-year-old male with a 3-month history of refractory stomatitis especially involving the lips and widespread vesiculobullous eruption on his trunk and extremities. The diagnosis of PNP was confirmed based on histological and serological results. Investigation for the underlying neoplasm revealed a retroperitoneal tumorous mass which was biopsied and diagnosed as the inflammatory myofibroblastic tumor (IMT)...
May 2017: Acta Medica Iranica
https://www.readbyqxmd.com/read/28724274/the-correlation-between-liver-fat-content-and-ulcerative-colitis-disease-severity
#4
Raika Jamali, Mohammad Biglari, Seyyed Vahid Seyyed Hosseini, Ali Shakouri Rad, Farid Kosari
To evaluate the association between disease severity and hepatic steatosis in patients with ulcerative colitis (UC) and non-alcoholic steatohepatitis (NASH). Consecutively selected UC patients admitted to the gastroenterology clinic were enrolled in the study. UC severity was assessed by Truelove and Witts classification. Patients with severe UC were excluded from the study. NASH was determined based on persistently elevated serum aminotransferase levels and detection of fatty liver ultrasound. Patients with other etiologies for elevated aminotransferase levels were excluded...
May 2017: Acta Medica Iranica
https://www.readbyqxmd.com/read/28722823/rational-design-of-a-highly-potent-and-selective-peptide-inhibitor-of-pace4-by-salt-bridge-interaction-with-d160-at-position-p3
#5
Vahid Dianati, Azar Shamloo, Anna Kwiatkowska, Roxane Desjardins, Armand Soldera, Robert Day, Yves L Dory
PACE4, a member of the proprotein convertases (PCs) family of serine proteases, is a validated target for prostate cancer. Our group has developed a potent and selective PACE4 inhibitor: Ac-LLLLRVKR-NH2 . In seeking for modifications to increase the selectivity of this ligand toward PACE4, we replaced one of its P3 Val methyl groups with a basic group capable of forming a salt bridge with D160 of PACE4. The resulting inhibitor is eight times more potent than the P3 Val parent inhibitor and two times more selective over furin, because the equivalent salt bridge with furin E257 is not optimal...
July 19, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28718779/a-review-and-experimental-study-on-application-of-classifiers-and-evolutionary-algorithms-in-eeg-based-brain-machine-interface-systems
#6
Farajollah Tahernezhad-Javazm, Vahid Azimirad, Maryam Shoaran
OBJECTIVE: Considering the importance and the near future development of noninvasive Brain-Machine Interface (BMI) systems, this paper presents a comprehensive theoretical-experimental survey on the classification and evolutionary methods for BMI-based systems in which EEG signals are used. APPROACH: The paper is divided into two main parts. In the first part a wide range of different types of the base and combinatorial classifiers including boosting and bagging classifiers and also evolutionary algorithms are reviewed and investigated...
July 18, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28717432/multiple-sclerosis-a-disease-on-a-dramatically-rising-trend-in-iran-review-of-possible-reasons
#7
REVIEW
Mohammad Ali Sahraian, Mohammad Sahebkar, Rouhullah Dehghani, Milad Derakhshan-Jazari, Vahid Kazami-Moghaddam, Ebrahim Kouchaki
There has been a global rising trend in recent years in the incidence of multiple sclerosis (MS). Despite being an MS low-risk region, this disease has also been recently on the rise in the Middle East. As part of the Middle East, Iran has not been spared either; however, the cause of this dramatic increase remains to be discovered. This study reviews possible reasons for this increase in Iran. Although many factors such as the increased rate of smoking, lifestyle changes, modernization, and contact with toxic solvents can be proposed as reasons for this sudden rise in the prevalence of MS in Iran, these factors cannot be taken as definite causes and further studies are required to prove their impact...
January 5, 2017: Iranian Journal of Neurology
https://www.readbyqxmd.com/read/28717369/association-of-irritable-bowel-syndrome-and-sleep-apnea-in-patients-referred-to-sleep-laboratory
#8
Farzin Ghiasi, Babak Amra, Vahid Sebghatollahi, Fatemeh Azimian
BACKGROUND: Irritable bowel syndrome (IBS) is assumed as one of the most frequent gastrointestinal disorders, which decreases the patient's quality of life. IBS pathogenesis, however, is not clearly defined. It seems that sleep apnea induces or escalates IBS clinical symptoms. This study aims at evaluating of IBS prevalence in patients, who are afflicted or are not afflicted with sleep apnea. MATERIALS AND METHODS: This was a case-control study, which was implemented in a sleep laboratory located in Isfahan, Iran...
2017: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/28713529/somatoform-dissociation-fatigue-severity-and-pain-behavior-compared-in-patients-with-migraine-headache-and-in-healthy-individuals
#9
Ghasem Fattahzadeh-Ardalani, Vida Aghazadeh, Abolfazl Atalu, Vahid Abbasi
The prevalence of migraine in the world is about 15 and 7% among women and men, respectively. The purpose of this study was comparison of somatoform dissociation, fatigue severity and pain behavior in patients with migraine headache and its relationship with coping strategies. This descriptive analytical study has been done on 120 patients with migraine headache and 120 healthy subjects were selected randomly. Data collected by somatoform dissociation questionnaire (SDQ-20), fatigue severity scale, pain behavior scale and coping strategies scale...
June 23, 2017: Neurology International
https://www.readbyqxmd.com/read/28708475/prevalence-and-length-of-the-anterior-loop-of-the-inferior-alveolar-nerve-in-iranians
#10
Mahsa Shariati, Maryam Rastegar Moghddam, Zeinab Davoudmanesh, Nasim Azizi, Vahid Rakhshan
The anterior loop of the inferior alveolar nerve is a sensitive anatomical feature which should be taken into account during installing dental implants anterior to the mental foramen. Since results regarding its prevalence and length are controversial, this study was conducted. A total of 452 mandible quadrants of 234 patients (age: 50.1±13.3 years, 113 males, 121 females) were studied using cone-beam computerized tomography (CBCT). After reconstructing axial, frontal, and sagittal slices, the region between the most anterior point on the mental foramen and the most anterior part of the mandibular nerve was inspected for signs of anterior loop presence...
July 14, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28708016/emergency-separation-of-craniopagus-twins-case-report
#11
Farideh Nejat, Zohreh Habibi, Mehrdad Goudarzi, Mahdi Souraki Azad, Ehsan Moradi, Vahid Heidari, Maliheh Kadivar, Zahra Ebrahim Soltani, Leila Kouchakzadeh
Craniopagus is a very rare congenital anomaly that tends to affect females more often than males. It is classified as partial or total. Most affected twins are either stillborn or die during the perinatal period. Those who survive birth should undergo detailed radiological evaluations soon after their condition becomes stable so that the precise anatomy of the conjoined part can be defined and surgery can be planned in detail by a multidisciplinary team. Recommendations for decreasing the risk of unsuccessful surgery include performing surgery on an elective basis after extensive preoperative radiological evaluations as well as when the twins are at an acceptable age and weight for a complex surgical separation, generally as staged procedures...
July 14, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28707264/evaluation-of-propylene-glycol-nanoliposomes-containing-curcumin-on-burn-wound-model-in-rat-biocompatibility-wound-healing-and-anti-bacterial-effects
#12
Nooshin Kianvash, Abbas Bahador, Maryam Pourhajibagher, Homanaz Ghafari, Vahid Nikoui, Sayed Mehdi Rezayat, Ahmad Reza Dehpour, Alireza Partoazar
Curcumin is an effective wound healing agent in burn therapy, but due to its low bioavailability, it is required to be formulated for topical therapy. Liposomal nanocarriers are developed as stable and efficient dermal delivery systems. In this study, we prepared curcumin-propylene glycol liposomes (Cur-PgL) to treat animals subjected to second degree burns. The characterization tests confirmed the production of monodisperse nanoliposomes of average size of about 145 nm with high entrapment efficiency percentage and a sustained release behavior...
July 13, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28704823/different-behavior-and-response-of-staphylococcus-epidermidis-and-streptococcus-pneumoniae-to-a-ventriculoperitoneal-shunt-an-in-vitro-study
#13
Vahid Heidari, Zohreh Habibi, Ahmadreza Hojjati Marvasti, Zahra Ebrahim Soltani, Negin Naderian, Parvin Tanzifi, Farideh Nejat
BACKGROUND: Pneumococcal shunt infection is a rare event. There is no consensus on the therapeutic management of this kind of shunt infection according to literature reviews, and it seems to be different from infection with Staphylococcus epidermidis. We studied 2 shunted patients with pneumococcal meningitis, both of whom were treated with only antibiotics. The management of these cases seems to be different from that of shunt catheter infection due to these bacteria. We conducted a laboratory study to show the different behavior of pneumococcus compared to S...
July 14, 2017: Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28704708/innate-immunity-related-pathogen-recognition-receptors-and-chronic-hepatitis-b-infection
#14
REVIEW
Reza Nosratabadi, Seyed Moayed Alavian, Mohammad Zare-Bidaki, Vahid Mohammadi Shahrokhi, Mohammad Kazemi Arababadi
Innate immunity consists of several kinds of pathogen recognition receptors (PRRs), which participate in the recognition of pathogens and consequently activation of innate immune system against pathogens. Recently, several investigations reported that PRRs may also play key roles in the induction/stimulation of immune system related complications in microbial infections. Hepatitis B virus (HBV), as the main cause of viral hepatitis in human, can induce several clinical forms of hepatitis B and also might be associated with hepatic complications such as cirrhosis and hepatocellular carcinoma (HCC)...
July 10, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28704463/a-novel-non-invasive-diagnostic-sampling-technique-for-cutaneous-leishmaniasis
#15
Yasaman Taslimi, Pardis Sadeghipour, Sima Habibzadeh, Vahid Mashayekhi, Hossien Mortazavi, Ingrid Müller, Majella E Lane, Pascale Kropf, Sima Rafati
Accurate diagnosis of cutaneous leishmaniasis (CL) is important for chemotherapy and epidemiological studies. Common approaches for Leishmania detection involve the invasive collection of specimens for direct identification of amastigotes by microscopy and the culturing of promastigotes from infected tissues. Although these techniques are highly specific, they require highly skilled health workers and have the inherent risks of all invasive procedures, such as pain and risk of bacterial and fungal super-infection...
July 13, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28702158/hematologic-disorder-a-manifestation-of-helicobacter-pylori-infection
#16
Mohammad Zamani, Jila Masrour-Roudsari, Vahid Zamani
No abstract text is available yet for this article.
2017: Caspian Journal of Internal Medicine
https://www.readbyqxmd.com/read/28698887/the-psychometric-parameters-of-the-farsi-form-of-the-arabic-scale-of-death-anxiety
#17
Mahboubeh Dadfar, Ahmed M Abdel-Khalek, David Lester, Mohammad Kazem Atef Vahid
The aim of this study was to describe the psychometric properties of the Farsi Form of the Arabic Scale of Death Anxiety (ASDA). The original scale was first translated into Farsi by language experts using the back translation procedure and then administered to a total of 252 Iranian college students and 52 psychiatric outpatients from psychiatric and psychological clinics. The one-week test-retest reliability of the Farsi version in a sample of college students was 0.78, indicating good temporal stability and corroborating the trait-like nature of scores...
2017: TheScientificWorldJournal
https://www.readbyqxmd.com/read/28698722/infantile-spasms-treated-with-intravenous-methypredinsolone-pulse
#18
Afagh Hassanzadeh Rad, Vahid Aminzadeh
OBJECTIVE: Infantile spasms is diagnosed late even by expert pediatricians. Late diagnosis (later than 3 weeks) can have a negative effect on the long-term prognosis. We aimed to investigate infantile spasms treated with intravenous methylprednisolone pulse. MATERIALS & METHODS: In this case series study, 20 infants with infantile spasms in 17-Shahrivar Hospital, Rasht, Iran were enrolled. Drugs were administered based on Mytinger protocol that included 3 days of methylprednisolone pulse and 56 days of oral prednisolone...
2017: Iranian Journal of Child Neurology
https://www.readbyqxmd.com/read/28696667/levitated-plasmonic-nanoantennas-in-an-aqueous-environment
#19
Yazgan Tuna, Ji Tae Kim, Hsuan-Wei Liu, Vahid Sandoghdar
We report on the manipulation of a plasmonic nanoantenna in an aqueous solution using an electrostatic trap created between a glass nanopipette and a substrate. By scanning a trapped gold nanosphere in the near field of a single colloidal quantum dot embedded under the substrate surface, we demonstrate about eight-fold fluorescence enhancement over a lateral full width at half-maximum of about 45 nm. We analyze our results with the predictions of numerical electromagnetic simulations under consideration of the electrostatic free energy in the trap...
July 11, 2017: ACS Nano
https://www.readbyqxmd.com/read/28693685/effect-of-involved-aspergillus-species-on-galactomannan-in-bronchoalveolar-lavage-of-patients-with-invasive-aspergillosis
#20
Mojtaba Taghizadeh-Armaki, Mohammad T Hedayati, Vahid Moqarabzadeh, Saham Ansari, Saeed Mahdavi Omran, Hossein Zarrinfar, Sasan Saber, Paul E Verweij, David W Denning, Seyedmojtaba Seyedmousavi
PURPOSE: The detection of galactomannan (GM) in bronchoalveolar lavage (BAL) fluid is an important surrogate marker for the early diagnosis and therapeutic monitoring of invasive aspergillosis (IA), regardless of the involved species of Aspergillus. Here, we utilized the Platelia Aspergillus GM enzyme immunoassay (Bio-Rad) to evaluate the GM index in BAL fluid samples from patients with proven, probable or putative IA due to Aspergillusflavus versus Aspergillusfumigatus. METHODOLOGY: In a prospective study between 2009 and 2015, 116 BAL samples were collected from suspected IA patients referred to two university hospitals in Tehran, Iran...
July 10, 2017: Journal of Medical Microbiology
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