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Katia Regina Marchetti, Maria Adelaide Albergaria Pereira, Arnaldo Lichtenstein, Edison Ferreira Paiva
: Adrenacarcinomas are rare, and hypoglycemic syndrome resulting from the secretion of insulin-like growth factor II (IGF-II) by these tumors have been described infrequently. This study describes the case of a young woman with severe persistent hypoglycemia and a large adrenal tumor and discusses the physiopathological mechanisms involved in hypoglycemia. The case is described as a 21-year-old woman who presented with 8 months of general symptoms and, in the preceding 3 months, with episodes of mental confusion and visual blurring secondary to hypoglycemia...
2016: Endocrinology, Diabetes & Metabolism Case Reports
Diane L Ritchie, Marcelo A Barria, Alexander H Peden, Helen M Yull, James Kirkpatrick, Peter Adlard, James W Ironside, Mark W Head
Creutzfeldt-Jakob disease (CJD) is the prototypic human prion disease that occurs most commonly in sporadic and genetic forms, but it is also transmissible and can be acquired through medical procedures, resulting in iatrogenic CJD (iCJD). The largest numbers of iCJD cases that have occurred worldwide have resulted from contaminated cadaveric pituitary-derived human growth hormone (hGH) and its use to treat primary and secondary growth hormone deficiency. We report a comprehensive, tissue-based and molecular genetic analysis of the largest series of UK hGH-iCJD cases reported to date, including in vitro kinetic molecular modelling of genotypic factors influencing prion transmission...
November 3, 2016: Acta Neuropathologica
Hasan A Zaidi, David J Cote, Ian F Dunn, Edward R Laws
Despite formal pathological criteria, not all atypical pituitary adenomas display clinically aggressive behavior. We set out to determine which factors predict a clinically aggressive phenotype among a cohort of atypical pituitary adenomas. Medical records were retrospectively reviewed from April 2008 to July 2015. Of 569 pituitary adenomas, 47 (8.3%) patients were surgically treated for atypical adenomas as defined by the WHO criteria. Clinically aggressive adenomas were defined as occurring in those patients who necessitated additional therapeutic intervention after the index (first) surgery, including additional surgery, medical therapy, or radiosurgery...
October 17, 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
Yann Gallais, Natacha Szely, François-Xavier Legrand, Arnaud Leroy, Marc Pallardy, Isabelle Turbica
Patients treated with therapeutic biological products (BP) frequently develop anti-drug antibodies (ADA) with potential neutralizing capacities leading to loss of clinical response or serious side effects. BP aggregates have been suggested to promote immunogenicity, thus enhancing ADA production. Dendritic cells (DC) are key effectors in T-cell and B-cell fates, and the subsequent generation of immunogenicity. The objective of this work was to determine if BP aggregates can participate to DC maturation and T-cell activation...
November 8, 2016: Immunology and Cell Biology
Yan-Yan Jin, Meng-Zao He, Zhen-Yong Wu, Ke Huang, Ying Shen, Li Liang, Jian-Hua Mao
OBJECTIVE: To investigate the role of intrauterine malnourishment in the development and function of pancreatic islet β-cells. METHODS: Whole-cell patch clamping was used to record voltage-gated calcium channel (VGCC)-mediated currents. Insulin secretion was detected by measuring capacitance using a sequence of sine wave stimuli. VGCC currents and insulin secretion were measured in the small for gestational age (SGA) group treated with human recombinant growth hormone (hGH)...
September 29, 2016: Growth Factors
Dan-Dan Guo, Wen-Zhi Guan, Yi-Wen Sun, Jie Chen, Xia-Yun Jiang, Shu-Ming Zou
Fibroblast growth factor 1 (Fgf1) is known as a mitogenic factor involved in the regulation of cell growth, proliferation, and differentiation in vertebrates. Here, we report the isolation and characterization of two fgf1 genes in grass carp (Ctenopharyngodon idella). Grass carp fgf1a and fgf1b cDNAs are highly divergent, sharing a relatively low amino acid sequence identity of 50%, probably due to fish-specific gene duplication. fgf1a and fgf1b mRNAs were detected in the zygote and expressed throughout embryogenesis...
January 1, 2017: General and Comparative Endocrinology
Bethany A Carboneau, Thao D V Le, Jennifer C Dunn, Maureen Gannon
Transgenic mouse models have been fundamental in the discovery of factors that regulate β-cell development, mass, and function. Several groups have recently shown that some of these models display previously uncharacterized phenotypes due to the transgenic system itself. These include impaired islet function and increased β-cell mass due to the presence of a human growth hormone (hGH) minigene as well as impaired β-cell proliferation in response to tamoxifen (TM) administration. We aimed to determine how these systems impact β-cell mass and proliferation during high fat diet (HFD)...
September 2016: Physiological Reports
Ana Belén González-Guerrero, Jesús Maldonado, Stefania Dante, Daniel Grajales, Laura M Lechuga
A label-free interferometric transducer showing a theoretical detection limit for homogeneous sensing of 5 × 10(-8) RIU, being equivalent to a protein mass coverage resolution of 2.8 fg mm(-2) , is used to develop a high sensitive biosensor for protein detection. The extreme sensitivity of this transducer combined with a selective bioreceptor layer enables the direct evaluation of the human growth hormone (hGH) in undiluted urine matrix in the 10 pg mL(-1) range.
September 27, 2016: Journal of Biophotonics
Jin-Hee Lee, Ji-Seon Jeong, Sook-Kyung Kim, Jimyeong Song, Ji Youn Lee, Soyun Baek, Jun-Hyuk Choi
Isotopically labeled proteins have been used as internal standards for mass spectrometry (MS)-based absolute protein quantification. Although this approach can provide highly accurate analyses of proteins of interest within a complex mixture, one of the major limitations of this method is the difficulty in preparing uniformly labeled standards. Human growth hormone (hGH) is one of the most important hormones that circulate throughout the body, and its measurement is primarily of interest in the diagnosis and treatment of growth disorders...
November 1, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
Nam Ah Kim, In Bok An, Hye Seong Lim, Sang In Yang, Seong Hoon Jeong
A newly developed hybrid Fc (hyFc) is a non-immunogenic and non-cytolytic Fc with intact Ig structure derived from human IgD and IgG4. It is fused with the human growth hormone (GXD-9) and was evaluated by various biophysical techniques. Two thermal transitions were evident by DSC, reflecting the unfolding of IgG4 and the conjugated protein. The highest Tm of the initial GXD-9 was 68.17°C and the Tm of the two domains were around 66°C and 70°C. Although Tm increased with decreasing concentration, which reflects increasing conformational stability, aggregation issues were still observed by DLS...
September 19, 2016: International Journal of Pharmaceutics
Adam Stevens, Philip George Murray, Jerome Wojcik, John Raelson, Ekaterina Koledova, Pierre Chatelain, Peter E Clayton
OBJECTIVE: Single nucleotide polymorphisms (SNPs) associated with the response to r-hGH have previously been identified in GHD and TS children in the PREDICT long-term follow-up (LTFU) study (NCT00699855). Here we describe the PREDICT validation (VAL) study (NCT01419249) which aimed to confirm these genetic associations. DESIGN AND METHODS: Children with GHD (n=293) or TS (n=132) were recruited retrospectively from 29 sites in nine countries. All children had completed one year of r-hGH therapy...
September 20, 2016: European Journal of Endocrinology
Rui Fang, Pawel J Grobelny, Robin H Bogner, Michael J Pikal
Lyophilized proteins are generally stored below their glass transition temperature (Tg) to maintain long-term stability. Some proteins in the (pure) solid state showed a distinct endotherm at a temperature well below the glass transition, designated as a pre-Tg endotherm. The pre-Tg endothermic event has been linked with a transition in protein internal mobility. The aim of this study was to investigate the internal dynamics of 2 proteins, insulin and human growth hormone (hGH), both of which exhibit the pre-Tg endothermic event with onsets at 50°C-60°C...
November 2016: Journal of Pharmaceutical Sciences
Himadri Pathak, Sudip Sasmal, Malaya K Nayak, Nayana Vaval, Sourav Pal
The open-shell reference relativistic equation-of-motion coupled-cluster method within its four-component description is successfully implemented with the consideration of single- and double- excitation approximations using the Dirac-Coulomb Hamiltonian. At the first attempt, the implemented method is employed to calculate ionization potential value of heavy atomic (Ag, Cs, Au, Fr, and Lr) and molecular (HgH and PbF) systems, where the effect of relativity does really matter to obtain highly accurate results...
August 21, 2016: Journal of Chemical Physics
A A Schulga, P V Mechev, M P Kirpichnikov, K G Skryabin, S M Deyev
The E. coli strain, overproducing human growth hormone (hGH) was made by integration of the hGH gene under the control of T7 promoter into the chromosomal LacZ gene of BL21(DE3) via lambda Red recombineering. The strain gave higher productivity (50 mg·L(-1)·OD550(-1)) and better growth characteristics than the corresponding strain in which the same hGH expression cassette was placed in a plasmid. The protein produced by the plasmid-free strain was purified and characterized to be hGH. The results demonstrates that a plasmid-free recombinant strain having a single-copy gene expression cassette in the chromosome could provide better gene activity regulation, higher productivity, superior growth characteristics, as well as more stringent control of the gene sequence invariance than a plasmid-based strain...
September 2016: Biochimie
Gemma Reverter-Branchat, Jaume Bosch, Jessica Vall, Magí Farré, Esther Papaseit, Simona Pichini, Jordi Segura
BACKGROUND: Although it is being increasingly applied, blood collection for drug testing in sport presents some logistic issues that complicate full applicability on a large scale. The use of dried blood spots (DBS) could benefit compliant blood testing considerably owing to its simplicity, minimal invasiveness, analyte stability, and reduced costs. The aim of this study was to evaluate the applicability of DBS to the methodology approved by the World Anti-Doping Agency (WADA) for detection of doping by recombinant human growth hormone (rhGH) in serum...
October 2016: Clinical Chemistry
Andreas Sandø, Martin Schultz, Jesper Eugen-Olsen, Lars Simon Rasmussen, Lars Køber, Erik Kjøller, Birgitte Nybo Jensen, Lisbet Ravn, Theis Lange, Kasper Iversen
BACKGROUND: Several biomarkers have shown to carry prognostic value beyond current triage algorithms and may aid in initial risk stratification of patients in the emergency department (ED). It has yet to be established if information provided by biomarkers can be used to prevent serious complications or deaths. Our aim is to determine whether measurement of the blood level of the biomarker soluble urokinase plasminogen activator receptor (suPAR) can enhance early risk stratification leading to reduced mortality, lower rate of complications, and improved patient flow in acutely admitted adult patients at the ED...
2016: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
Mamdouh R Rezk, Mostafa A Shehata, Marwa F Mohamed, Faten Abdel Aziz Fathalla
A selective, rapid size-exclusion chromatographic method was developed and validated for the separation of the human growth hormone (hGH) somatropin from its high-molecular-weight aggregates. Separation was achieved using a nontoxic mobile phase compared with the official method of the European Pharmacopoeia that uses 2-propanol in a mobile phase. The developed method used a YMC-Pack Diol (YMC Karasuma, Kyoto, Japan; 300 × 8.0 mm, 5 μm) analytical column. The mobile phase was formed with a pH 7phosphate buffer that was pumped at a flow rate of 1 mL/min with UV detection at 214 nm...
September 2016: Journal of AOAC International
Christina Svanberg, Lars-Inge Norevall, Bertil Ekman, Jeanette Wahlberg, Mats Bågesund
Turner syndrome (TS) is a genetic disorder of females with a prevalence of 1/2000-3000 live female births. The aim of this study was to compare cephalometric variables from adult women diagnosed with TS to a standardized reference group of 31-year old healthy women, and to evaluate the possible effects of human growth hormone (hGH) therapy in women with TS. Registered TS subjects in the Southeast region of Sweden were invited to take part in the study. Twenty-one women aged 36 ± 13(18-57) years accepted participation...
2016: Swedish Dental Journal
Ngoc Quang Tran, Bong Kyun Kang, Moo Hyun Woo, Dae Ho Yoon
The effect of the doping configuration and concentration of nitrogen (N) and sulfur (S) on the electrochemical performance of 3 D N and S co-doped hole defect graphene hydrogel (NS-HGH) electrodes is investigated. Surprisingly, by introducing a hole defect on the graphene surface, the difference in the doping concentrations of N and S can be used to effectively modulate the electrochemical behavior of the NS-HGH. The hole defects provide a rapid ion diffusion path. Finally, we showed that the intriguing specific capacitance (536 F g(-1) ) of the NS-HGH could enhance the overall performance of the pseudocapacitance and electric double layer capacitance...
August 23, 2016: ChemSusChem
Roger Persson, Annie Høgh, Matias Brødsgaard Grynderup, Morten Vejs Willert, Maria Gullander, Åse Marie Hansen, Henrik Albert Kolstad, Ole Mors, Eva Gemzøe Mikkelsen, Ann Suhl Kristensen, Linda Kaerlev, Reiner Rugulies, Jens Peter Ellekilde Bonde
OBJECTIVE: To examine whether a shift in work-related bullying status, from being non-bullied to being bullied or vice versa, was associated with changes in reporting of personality characteristics. METHODS: Data on bullying and personality (neuroticism, extraversion, and sense of coherence) were collected in three waves approximately 2 years apart (N = 4947). Using a within-subjects design, personality change scores that followed altered bullying status were evaluated with one-sample t tests...
September 2016: Journal of Occupational and Environmental Medicine
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