Publications by authors named "Hubler T"

Introduction: Human milk oligosaccharides (HMOs) are important components of human milk having diverse functions in the development of infants. Randomized controlled trials (RCTs) have demonstrated that infant formulas with the HMOs 2'-fucosyllactose (2'FL) and lacto-N-neotetraose (LNnT) are safe, well-tolerated, and support normal growth. This study aimed to generate real-world evidence (RWE) on growth and gastrointestinal (GI) tolerance in infants consuming a formula with 1 g/L 2'FL and 0.

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  • FKBP52 and FKBP51, large molecular weight immunophilins, are primarily known for their roles in steroid hormone receptor complexes but also have significant regulatory functions in various cellular processes.
  • Their genes, FKBP4 and FKBP5, are similar across chordates and their expression is affected by both genetic and epigenetic factors.
  • Recent research highlights their involvement in the nervous system, reproduction, cancer, and the regulation of tau protein and microtubule assembly, as well as interactions with ion channel proteins from the TRPC subfamily.
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Pituitary gonadotropins LH and FSH play central roles in reproductive function. In Old World primates, LH stimulates ovulation in females and testosterone production in males. Recent studies have found that squirrel monkeys and other New World primates lack expression of LH in the pituitary.

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Secretogranin II (SgII) is a member of the granin family of proteins found in neuroendocrine and endocrine cells. The expression and storage of SgII in the pituitary gland of Old World primates and rodents have been linked with those of luteinizing hormone (LH). However, New World primates including squirrel monkeys do not express LH in the pituitary gland, but rather CG is expressed.

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The goal of this study was to understand the basis for high androgen levels in squirrel monkeys (Saimiri spp.). Mass spectrometry was used to analyze serum testosterone, androstenedione, and dihydrotestosterone of male squirrel monkeys during the nonbreeding (n = 7) and breeding (n = 10) seasons.

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  • Squirrel monkeys have high cortisol levels due to glucocorticoid resistance, which may stem from mutations in their glucocorticoid receptor (GR) or the expression of the co-chaperone FKBP51.
  • The study found that while squirrel monkey GR is less responsive in certain cells compared to human GR, maximum drug induction levels were similar.
  • FKBP51 expression reduces GR responsiveness in both squirrel monkey and human cells, and blocking FKBP51 with FK506 improved GR responsiveness in cells naturally high in FKBP51.
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  • New World squirrel monkeys have high cortisol levels but maintain normal electrolyte and blood pressure balances, indicating potential adaptive strategies to manage cortisol's effects.
  • Despite their high cortisol, these monkeys do not show an increase in aldosterone levels, which is often a compensatory response in other species.
  • Increased levels of cortisone in relation to cortisol, along with distinct urinary corticosteroid metabolite profiles, suggest that these monkeys have enhanced enzymatic activity to help protect against high cortisol's impact on mineralocorticoid receptor activity.
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The luminescence of trans-[TcO2(L)4]+ (L = pyridine (py) or picoline (pic)) and trans-[TcO2(CN)4]3- at room and low temperature is described and represents the first example of room temperature excited-state luminescence observed for Tc complexes. At room temperature, the complexes exhibited broad luminescence with emission maxima ranging from 745 to 780 nm. Analogous to the Re complexes (emission at 635-655 nm), the low-temperature emission spectra of microcrystalline samples of [TcO2(py)4]BPh4 and [TcO2(pic)4]BPh4 display the characteristic progressions of the symmetric O=Tc=O and Tc-L stretching modes.

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Expression of FKBP51, a large molecular weight immunophilin, is strongly enhanced by glucocorticoids, progestins, and androgens. However, the activity of a 3.4-kb fragment of the FKBP51 gene (FKBP5) promoter was only weakly increased by progestin and we show here that it is unresponsive to glucocorticoids and androgens.

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FKBP52 is a widely expressed FK506-binding immunophilin that possesses peptidylprolyl isomerase activity and a tetratricopeptide repeat involved in protein-protein interaction. FKBP52 plays an important role in steroid receptor function and is implicated in other diverse processes, including regulation of transcription, cation channel activity, and gene transfer efficiency. Reported here is the genomic organization of the human FKBP52 gene (FKBP4), which shares all but one of the same exon-intron boundaries as the structurally related immunophilin FKBP51 gene (FKBP5).

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  • FKBP51 and FKBP52 are immunophilins that play key roles in steroid hormone receptor function, with FKBP51 identified as a hormone-responsive gene.
  • Progestin treatment significantly increased FKBP51 mRNA and protein levels in T-47D cells, and this induction was inhibited by the progestin receptor antagonist RU486.
  • The study found that elevated FKBP51 expression can reduce progestin responsiveness in cells, suggesting that it may be linked to progesterone resistance observed in species like the squirrel monkey.
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A portable spectroelectrochemical sensor has been designed, evaluated, and demonstrated on a complex sample of radioactive waste. The sensor consisted of a black delrin sample compartment with a total internal sample volume of 800 microL, attached to an indium tin oxide coated glass multiple internal reflection optical element. Detection was by total internal reflection of light from a blue light emitting diode source.

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