Thomas E. Ludwig

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SUMMARY Assemble is an intuitive graphical interface to analyze, manipulate and build complex 3D RNA architectures. It provides several advanced and unique features within the framework of a semi-automated modeling process that can be performed by homology and ab initio with or without electron density maps. Those include the interactive editing of a(More)
Oxytocin (OT) is the physiological stimulus for pulsatile release of endometrial prostaglandin (PG) F2alpha during luteolysis in domestic ungulates, and the cellular mechanism for this appears to involve phosphoinositide (PI) hydrolysis. To determine which endometrial cell type(s) was responsive to OT during luteolysis in swine, luminal epithelial (LEC),(More)
Luminal epithelial cells of porcine endometrium are unresponsive to oxytocin (OT) in vitro although they express the greatest quantity of OT and receptors for OT in vivo. Therefore, the objective of this study was to determine if oxytocin acted in an autocrine manner on luminal epithelial cells to stimulate prostaglandin (PG)F(2alpha) secretion. Treatment(More)
These studies were performed to test the hypotheses that: 1) endometrial responsiveness to oxytocin (OT) in pig endometrium is associated with changes in OT receptor (OTr) population density resulting from corresponding regulation of OTr gene transcription, 2) endometrial responsiveness to OT is controlled solely through a mechanism involving changes in OTr(More)
The range of functions ascribed to RNA molecules has grown considerably during recent years. Consequently, the analysis and comparison of RNA sequences have become recurrent tasks in molecular biology. Because the biological function of an RNA is expressed more by its folded architecture than by its sequence, original computational tools adapted to the(More)
Culture of hamster embryos with 0.35 mM inorganic phosphate results in developmental arrest at the 2-cell stage. These arrested 2-cell embryos were found to have significantly elevated levels of both intracellular pH and intracellular free calcium. Culture of 2-cell embryos with both glucose and phosphate did not further alter intracellular ionic(More)
The effect of low concentrations of inorganic phosphate (P(i)) on development, metabolic activity, and mitochondrial organization in the same cohorts of cultured hamster embryos was evaluated. Two-cell embryos were collected from eCG-stimulated golden hamsters and cultured in HECM-10 with 0.0 (control), 1.25, 2.5, or 5.0 microM KH(2)PO(4). Glucose(More)
In a series of three experiments, a mental synthesis task was administered to groups of college students and older adults. Simple symmetrical or asymmetrical straightline patterns were divided into two parts; the two parts were presented either sequentially or simultaneously. Participants were instructed to mentally combine the two parts and either(More)
The aim of this study was to determine the effect of oxytocin on PGF2 alpha secretion into the uterine lumen of pigs and subsequent endometrial responsiveness to oxytocin in vitro. Cyclic, pregnant and oestradiol-induced pseudopregnant gilts were injected i.v. with vehicle or 20 iu oxytocin 10 min before hysterectomy on day 16 after oestrus. Concentrations(More)