The Role of the PGC1α Gly482Ser Polymorphism in Weight Gain due to Intensive Diabetes Therapy

The Diabetes Control and Complications Trial (DCCT) involved intensive diabetes therapy of subjects with type 1 diabetes mellitus (T1DM) for an average period of 6.5 years. A subset of these subjects gained excessive weight. We tested for association of polymorphisms in 8 candidate genes with the above trait. We found the Gly482Ser polymorphism in the peroxisome proliferator-activated receptor γ coactivator-1α (PGC1α) to be significantly associated with weight gain in males (P = .0045) but not in females. The Ser allele was associated with greater weight gain than the Gly allele (P = .005). Subjects with a family history of type 2 diabetes mellitus (T2DM) were more common among those who gained excessive weight. We conclude that T2DM and the Gly482Ser polymorphism in PGC1α contribute to the effect of intensive diabetes therapy on weight gain in males with T1DM

Deep Brain Stimulation Management of Essential Tremor with Dystonic Features

Clinical Vignette: A 64-year-old female with essential tremor (ET) presents for evaluation of deep brain stimulation (DBS) candidacy. Examination revealed subtle dystonic features as well as a disabling postural-action tremor. Clinical Dilemma: Can dystonia occur in the setting of the diagnosis of ET and can its presence alter DBS target selection? Clinical Solution: Unilateral DBS implantation of the ventralis intermedius (Vim) led to improvement in both tremor and dystonic posturing. Gap in Knowledge: Case reports of DBS in dystonic tremor suggest Vim, globus pallidus internus (GPi), and subthalamic targets may all be effective, to varying degrees, in improving both tremor and dystonia. More rigorous studies are needed to identify the optimal target(s). Expert Commentary: This case underscores the limited evidence available to guide a clinician’s choice of DBS targets in patients with ET and dystonia. The severity of the dystonia and the presence of more generalized dystonia may alter the thinking about optimal targeting. Vim, GPi, and subthalamic targets appear potentially acceptable options, though Vim is usually the first target attempted when postural-action tremor is the chief complaint. Occasionally, a second rescue DBS lead may be necessary

Hankel determinant for a class of analytic functions of complex order defined by convolution

In this paper, we obtain the Fekete-Szego inequalities for the functions of complex order defined by convolution. Also, we find upper bounds for the second Hankel determinant $|a_2a_4-a_3^2|$ for functions belonging to the class $S_{\gamma}^b(g(z);A,B)$

Academic Collaborative Efforts to Promote STEM Equity in High Needs Schools

America is at risk of facing a shortage of workers in STEM fields in the near future because lack of interest by its youth. It is well known that providing early exposure for P-12 students to engaging science, technology, engineering, and math (STEM) experiences can lead to lifelong learning and positively impact future career decisions. This manuscript describes one university’s collective efforts to bring equity to STEM education for an urban high needs school district in the northeastern part of the United States through various STEM initiatives over a five-year period. Through multiple projects and initiatives targeting both P-12 students and their teachers, descriptive results revealed a positive impact while pinpointing areas that still require attention. P-12 students indicated an increase in STEM knowledge and an increased interest in STEM careers following exposure to various STEM lessons and interactive experiences. P-12 teachers specified that Professional Development (PD) they received from university faculty as well as engaging in STEM experiences with their students enhanced their confidence in their ability to incorporate STEM lessons within their classrooms. An urban partner administrator viewed these various STEM initiatives as vital in their quest to bring equity for STEM education to their diverse student population

Understanding the Molecular and Structural Selectivity of Oxidant-induced Nitration and its Reversal in Sarcoplasmic Reticulum Ca2+ -ATPase SERCA2a vs. SERCA1a

The present study uses existing sequence (SERCA1a & SERCA2a) and structure (SERCA1a) information to extrapolate a tertiary structure construct for SERCA2a using computational modeling software. A comparison of SERCA1a and SERCA2a models could reveal structural anomalies that explain the basis for selective and specific Tyr nitration in SERCA2a but not SERCA1a

Autofluorescence of routinely hematoxylin and eosinstained sections without exogenous markers

Hematoxylin and eosin stained paraffin section was examined by fluorescence microscopy to study the pattern and distribution of fluorescence. Autofluorescence was sensitive and specific for detection ofelastic and collagen fibers. It was concluded that analytical morphological techniques based on autofluorescence can obtain information about morphological and pathological state of tissue and cells

Machine Learning-based Classification of Diffuse Large B-cell Lymphoma Patients by Their Protein Expression Profiles

Characterization of tumors at the molecular level has improved our knowledge of cancer causation and progression. Proteomic analysis of their signaling pathways promises to enhance our understanding of cancer aberrations at the functional level, but this requires accurate and robust tools. Here, we develop a state of the art quantitative mass spectrometric pipeline to characterize formalin-fixed paraffin-embedded tissues of patients with closely related subtypes of diffuse large B-cell lymphoma. We combined a super-SILAC approach with label-free quantification (hybrid LFQ) to address situations where the protein is absent in the super-SILAC standard but present in the patient samples. Shotgun proteomic analysis on a quadrupole Orbitrap quantified almost 9,000 tumor proteins in 20 patients. The quantitative accuracy of our approach allowed the segregation of diffuse large B-cell lymphoma patients according to their cell of origin using both their global protein expression patterns and the 55-protein signature obtained previously from patient-derived cell lines (Deeb, S. J., D'Souza, R. C., Cox, J., Schmidt-Supprian, M., and Mann, M. (2012) Mol. Cell. Proteomics 11, 77-89). Expression levels of individual segregation-driving proteins as well as categories such as extracellular matrix proteins behaved consistently with known trends between the subtypes. We used machine learning (support vector machines) to extract candidate proteins with the highest segregating power. A panel of four proteins (PALD1, MME, TNFAIP8, and TBC1D4) is predicted to classify patients with low error rates. Highly ranked proteins from the support vector analysis revealed differential expression of core signaling molecules between the subtypes, elucidating aspects of their pathobiology

Tissue microarrays and their use for preparation of reference slides for educational purposes in histology and histopathology

Use of Tissue array was first applied in 1998, and has received a significant amount of attention from the research community ever since. In this technique, a large number (up to 1000) of cylindrical tissue core extracted from \"donor\" paraffin block are deposited into \"recipient\" block. The aim was modification of the technique of tissue array for manual preparation of the recipient block and production of slides of educational interest in histology and histopathology. The area of interest was localized with the help of stained section, the area was punctured, and the cylindrical core of tissue removed was then introduced into another (recipient) paraffin block. Puncture method was suitable only for parenchymatous organs (liver, kidney, heart, spleen, etc.) but longitudinal sections were required for tubular (gastrointestinal tract, urinary tract, genital tract) and hollow organs (gallbladder, urinary bladder) and brain. The method described is of importance in procurement of materials for preparation of slides for educational purposes and in overcoming the shortage of these materials especially in the field of pathology African Journal of Health Sciences Vol. 13 (3-4) 2006: pp. 66-6

Inclusion and neighborhood properties of certain subclasses of p-valent functions of complex order defined by convolution

In this paper we introduce and investigate three new subclasses of $p$-valent analytic functions by using the linear operator $D_{\lambda,p}^m(f*g)(z)$. The various results obtained here for each of these function classes include coefficient bounds, distortion inequalities and associated inclusion relations for $(n,\theta)$-neighborhoods of subclasses of analytic and multivalent functions with negative coefficients, which are defined by means of a non-homogenous differential equation

Acute Suppuration of the Pancreatic Duct in a Patient with Tropical Pancreatitis

Background/Aim: Pancreatic sepsis secondary to infected necrosis, pseudocyst, or pancreatic abscess is a well-known clinical entity. Acute suppuration of the pancreatic duct (ASPD) in the setting of chronic calcific pancreatitis and pancreatic ductal obstruction with septicemia is a rare complication that is seldom reported. It is our aim to report a case of ASPD with Klebsiella ornithinolytica, in the absence of pancreatic abscess or infected necrosis. Case Report: A 46-year-old Asian-Indian man with chronic tropical pancreatitis who was admitted with recurrent epigastric pain that rapidly evolved into septic shock. A CT scan of abdomen revealed a dilated pancreatic duct with a large calculus. Broad-spectrum antibiotics, vasopressors and activated recombinant protein C were initiated. Emergency ERCP showed the papilla of Vater spontaneously expelling pus. Probing and stenting was instantly performed until pus drainage ceased. Repeat CT scan confirmed the absence of pancreatic necrosis or fluid collection, and decreasing ductal dilatation. Dramatic clinical improvement was observed within 36 hours after intervention. Blood cultures grew Klebsiella ornithinolytica. The patient completed his antibiotic course and was discharged. Conclusion: ASPD without pancreatic abscess or infected necrosis is an exceptional clinical entity that should be included in the differential diagnosis of pancreatic sepsis. A chronically diseased pancreas and diabetes may have predisposed to the uncommon pathogen. The presence of intraductal pancreatic stones obstructing outflow played a major role in promoting bacterial growth, suppuration and septicemia. Immediate drainage of the pancreatic duct with endoscopic intervention is critical and mandatory