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Lateral pterygoid muscle volume and migraine in patients with temporomandibular disorders
Sérgio Lúcio Pereira de Castro Lopes,André Luiz Ferreira Costa,Thiago de Oliveira Gamba,Isadora Luana Flores,Adriana Dibo Cruz,Li Li Min 대한영상치의학회 2015 Imaging Science in Dentistry Vol.45 No.1
Purpose: Lateral pterygoid muscle (LPM) plays an important role in jaw movement and has been implicated in Temporomandibular disorders (TMDs). Migraine has been described as a common symptom in patients with TMDs and may be related to muscle hyperactivity. This study aimed to compare LPM volume in individuals with and without migraine, using segmentation of the LPM in magnetic resonance (MR) imaging of the TMJ. Materials and Methods: Twenty patients with migraine and 20 volunteers without migraine underwent a clinical examination of the TMJ, according to the Research Diagnostic Criteria for TMDs. MR imaging was performed and the LPM was segmented using the ITK-SNAP 1.4.1 software, which calculates the volume of each segmented structure in voxels per cubic millimeter. The chi-squared test and the Fisher’s exact test were used to relate the TMD variables obtained from the MR images and clinical examinations to the presence of migraine. Logistic binary regression was used to determine the importance of each factor for predicting the presence of a migraine headache. Results: Patients with TMDs and migraine tended to have hypertrophy of the LPM (58.7%). In addition, abnormal mandibular movements (61.2%) and disc displacement (70.0%) were found to be the most common signs in patients with TMDs and migraine. Conclusion: In patients with TMDs and simultaneous migraine, the LPM tends to be hypertrophic. LPM segmentation on MR imaging may be an alternative method to study this muscle in such patients because the hypertrophic LPM is not always palpable.
Miguel A. De la Cruz,Miguel A. Ares,Diana Rodríguez-Valverde,Alba Adriana Vallejo-Cardona,Mario Alberto Flores-Valdez,Iris Denisse Cota Núñez,Michel de Jesús Aceves-Sánchez,Jonahtan Lira-Chávez,Jacobo 한국미생물·생명공학회 2020 Journal of microbiology and biotechnology Vol.30 No.6
Mycobacterium tuberculosis produces mycolic acids which are relevant for persistence, recalcitrance to antibiotics and defiance to host immunity. c-di-GMP is a second messenger involved in transition from planktonic cells to biofilms, whose levels are controlled by diguanylate cyclases (DGC) and phosphodiesterases (PDE). The transcriptional regulator dosR, is involved in response to low oxygen, a condition likely happening to a subset of cells within biofilms. Here, we found that in M. bovis BCG, expression of both BCG1416c and BCG1419c genes, which code for a DGC and a PDE, respectively, decreased in both stationary phase and during biofilm production. The kasA, kasB, and fas genes, which are involved in mycolic acid biosynthesis, were induced in biofilm cultures, as was dosR, therefore suggesting an inverse correlation in their expression compared with that of genes involved in c-di-GMP metabolism. The relative abundance within trehalose dimycolate (TDM) of α- mycolates decreased during biofilm maturation, with methoxy mycolates increasing over time, and keto species remaining practically stable. Moreover, addition of synthetic c-di-GMP to mid-log phase BCG cultures reduced methoxy mycolates, increased keto species and practically did not affect α-mycolates, showing a differential effect of c-di-GMP on keto- and methoxy-mycolic acid metabolism.
Rheology and gel point of the enzymatic hydrolysis of urea in the presence of urease
R. Serrato-Millán,L. Medina-Torres,F. Calderas,B.L. España-Sánchez,M. Estevez,A.R. Hernandez-Martínez,M. Cruz-Soto,I.C. Sánchez,R. Gómez-García,I. Sánchez-Betancourt,M.C. Velasquillo-Martínez,G. Luna- 한국유변학회 2017 Korea-Australia rheology journal Vol.29 No.1
This study reports on the rheology of the gelation kinetics of raw chitosan (CTS) solutions (2% w/v) produced by enzymatic hydrolysis of urea at different urea concentrations (40, 50, 60, 80, and 100 mM) in the presence of urease at 1 U/mL. Viscoelastic parameters and pH values were evaluated during gelation process and the rheological properties of CTS hydrogels produced were monitored after 24 h at 37°C to simulate human body temperatures. pH measurements suggest that above some critical urea concentration (50 mM) the time required (tgel) to reach the critical pH gelation shows no dependence on urea concentration (tgel was ca. 70 minutes). Above 50 mM of urea concentration, CTS hydrogels exhibit an elastic modulus G' higher than the viscous modulus G'' with no frequency dependence characteristic of a gel behavior. Gelation kinetics analyzed by rheology suggest that the G' (i.e., structure) development depends on urea concentration during solution neutralization.
C. G. Garay-Reyes,S. E. Hernández-Martínez,J. L. Hernández-Rivera,J. J. Cruz-Rivera,E. J. Gutiérrez-Castañeda,H. J. Dorantes-Rosales,J. Aguilar-Santillan,R. Martínez-Sánchez 대한금속·재료학회 2017 METALS AND MATERIALS International Vol.23 No.2
According to Lifshitz, Slyozov, and Wagner (LSW) and Trans-Interface Diffusion-Controlled (TICD) theoreticalmodels, this paper reports the microstructure and its coarsening behavior of γ' metastable-coherentprecipitates in concentration gradient of Ni-13.75Ti (at%)/Ni generated by diffusion couple. The coarseningof precipitates was evaluated in two different Ti contents (R1-11.4Ti (at%) and R2-13Ti (at%)) generated alongthe concentration gradient and includes average size, size distributions and growth rate. The solvus andmetastable-coherent bimodal lines as determined at 850 °C of 9.16 (at%) and 9.92Ti (at%) respectively byscanning electron microscopy. This paper suggests that elastic strains produced by the matrix/precipitate latticemismatch caused significant deviations between the experimental results and those predicted by the LSW or TIDCtheories. Activation energies for TIDC (Qi) and LSW (Qr) are Qr: 219.69 and 172.61 kJ mol-1for R1 and R2regions, respectively, and Qi: 218.46 and 164.56 kJmol-1for R1 and R2 regions, respectively. A concentration gradientallows the study of various alloys with different concentration and volume-fraction in a single sample.
Garlic Powder Ameliorates Cisplatin-Induced Nephrotoxicity and Oxidative Stress
Ana Carolina Razo-Rodríguez,Yolanda I. Chirino,Dolores Javier Sánchez-González,Claudia María Martínez-Martínez,Cristino Cruz,José Pedraza-Chaverri 한국식품영양과학회 2008 Journal of medicinal food Vol.11 No.3
cis-Diamminedichloroplatinum (II) (cisplatin) is an effective chemotherapeutic agent successfully used in the treatment of a wide range of tumors. Nevertheless, nephrotoxicity has restricted its clinical use. The use of more than a few antioxidants has shown that reactive oxygen species are involved in cisplatin-induced nephrotoxicity. In the present work the effect of garlic powder, a recognized antioxidant, on cisplatin-induced nephrotoxicity and oxidative and nitrosative stress was studied. Rats were fed with a 2% garlic powder diet for 4 weeks. A single injection of cisplatin (7.5 mg/kg) induced tubular damage and an increase in the following markers of renal injury 3 days later: blood urea nitrogen, serum creatinine, and urinary excretion of N-acetyl-β-D-glucosaminidase. The cisplatin injection also increased 3-nitrotyrosine and 4-hydroxy-2-nonenal immunostaining in renal cortex and medulla. It was found that the garlic powder feeding was able to prevent by 40–59% the alterations in the markers of renal injury studied, by 33% the histological damage, and by 38–75% the increase in markers of oxidative and nitrosative stress. It is concluded that the ability of garlic powder to ameliorate cisplatin-induced renal injury is associated with its antioxidant properties. Our data support the use of garlic powder as a renoprotective agent.
Susana Marcos Alonso,Nicole Almeida Ayerve,Chiara Monopoli Roca,Guillermo Coronel Touma,Juan Carlos del Pozo de Dios,Hortensia Sánchez Gómez,Santiago Santa Cruz Ruíz,Ángel Batuecas Caletrío 대한이비인후과학회 2023 Clinical and Experimental Otorhinolaryngology Vol.16 No.3
Objectives. Ménière disease (MD) is an idiopathic disorder that affects hearing and inner ear balance. Intratympanic genta-micin (ITG) is recognized as an effective treatment for uncontrolled MD characterized by persistent vertigo attacksdespite therapy. The video head impulse test (vHIT) and skull vibration-induced nystagmus (SVIN) are validated meth-ods for evaluating vestibular function. A progressive linear relationship has been identified between the slow-phasevelocity (SPV) of SVIN determined using a 100-Hz skull vibrator and the gain difference (healthy ear/affected ear)measured by vHIT. The aim of this study was to ascertain whether the SPV of SVIN was associated with the recoveryof vestibular function following ITG treatment. Consequently, we sought to determine whether SVIN could predictthe onset of new vertigo attacks in patients with MD who were treated with ITG. Methods. A prospective longitudinal case-control study was conducted. Several variables were recorded post-ITG and through-out the follow-up period, followed by statistical analyses. Two groups were compared: patients who experienced ver-tigo attacks 6 months after ITG and those who did not. Results. The sample comprised 88 patients diagnosed with MD who underwent ITG treatment. Of the 18 patients who ex-perienced recurring vertigo attacks, 15 demonstrated gain recovery in the affected ear. However, all 18 patients ex-hibited a decrease in the SPV of SVIN. Conclusion. The SPV of SVIN may be more sensitive than vHIT in identifying the recovery of vestibular function followingITG administration. To our knowledge, this is the first study to illustrate the link between a reduction in SPV and thelikelihood of vertigo episodes in patients with MD who have been treated with ITG.
Natural products in the research of cholesterol gallstones
Ibrahim Guillermo Castro-Torres,Minarda De la O-Arciniega,Janeth Gallegos-Estudillo,Mariano Martínez-Vázquez,Elia Brosla Naranjo-Rodríguez,Miguel Ángel Domínguez-Ortíz,Jesús Samuel Cruz-Sánchez 셀메드 세포교정의약학회 2013 TANG Vol.3 No.3
Cholesterol gallstones are a digestive disease of high prevalence that has many risk factors; for this reason, research has focused mainly on how to prevent it rather than how to treat it. Many molecules of the hepatic, bile and intestinal systems are involved in the pathophysiology of this disease, making it very difficult to find a therapeutic target. The pharmacological treatment is limited, so when gallstones generate symptoms, medical treatment indicates gallbladder removal. Ursodeoxycholic acid is used to dissolve cholesterol stones, and ezetimibe and statins are other drugs with possible applications in the treatment of this disease. Given the small number of drugs that have been developed for treating this disease, the research of natural products becomes of paramount importance. Resources such as black radish, glucosinolates, fenugreek, capsaicin, curcumin, garlic, and onion, have all shown significant effects in the prevention and treatment of cholesterol gallstones. In this review, we made a synthesis of the scientific reports that deal with these natural products and that can serve as antecedents for finding a way to treat the most common disease of the gallbladder.
Liezel S. Cruz(Liezel S. Cruz ),Agham C. Cuevas(Agham C. Cuevas ),Jan Danica S. Asma(Jan Danica S. Asma ),JP Roma D. Duque(JP Roma D. Duque ),Beah M. Orlina(Beah M. Orlina ) The International Academy of Global Business and T 2023 The International Academy of Global Business and T Vol.19 No.1
Purpose - Cooperatives are people-centric organizations that are organized to meet the common needs of their members. One key goal for the establishment of agricultural cooperatives is to help improve the marketing efficiency of their members. This study aimed to analyze the correlation between cooperative membership and marketing efficiency among coffee farmers in the provinces of Cavite, Benguet, and Mountain Province, Philippines. Design/Methodology/Approach - Primary and secondary data were gathered in the study. Linear regression with endogenous treatment was used to analyze the data which examined both observable and unobservable factors affecting the treatment, cooperative membership, potential outcome, and the marketing efficiency. Findings - The results of the study revealed that the average farmer generated USD0.85 more farm income for every peso spent on marketing activities if he/she was a member of an agricultural cooperative. This implied that membership positively improved the marketing efficiency of coffee farmers. Moreover, farmers who sold their processed coffee to cooperatives and who had price access were observed to have higher marketing efficiency. Farmers who were females, adopted more processing technologies, took longer to search for price information, sold to cooperatives, had more coffee experience, and whose farms were located away from technology sources were more likely to become cooperative members. Research Implications - The study recommended the promotion of cooperative membership among farmers to improve their marketing efficiency and capacity-building activities related to the technology adoption and management of cooperatives.
Loss of strength in asbestos-cement water pipes due to leaching
Lluís Gil,Marco A. Perez,Ernest Bernat,Juan J. Cruz 국제구조공학회 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.40 No.5
Asbestos-cement is a material with valuable strength and durability. It was extensively used for water distribution pipes across the world from the 1950s until the early 1980s. The network of pipes in this case study dates from the 1970s, and after more than 30 to 40 years of service, some pipes have been found to break under common service pressure with no apparent reason. A set of mechanical tests was performed including bending, compression, pressure and crushing tests. Microscopy analysis was also used to understand the material behaviour. Tests showed that there was a clear loss of strength in the pipes and that the safety factor was under the established threshold in most of the specimens. Microscopy results showed morphological damage to the pipes. The loss of strength was attributed to a leaching effect. Leaching damages the cement matrix and reduces the frictional interfacial shear stress.