In embryonic stem cells, Oct-4 concentration is critical in determining the development of endoderm, mesoderm, and trophectoderm. Although Oct-4 expression is essential for mesoderm development, it is unclear whether it has a role in the development of specific mesodermal tissues. In this study, we have examined the importance of Oct-4 in the generation of hematopoietic cells using an inducible...

The effect of the CAM-OCT plasmid on responses to UV irradiation of Pseudomonas aeruginosa recA mutants was characterized. Mutant alleles examined included rec-1, rec-2, and recA7::Tn501. The plasmid substantially enhanced both survival and mutagenesis of RecA- cells after treatment with UV light. Survival of the RecA-(CAM-OCT) cells after UV irradiation was intermediate between that seen in th...

AIMS We investigated the feasibility of thrombus quantification by frequency-domain optical coherence tomography (FD-OCT) methods in patients with highly thrombotic acute coronary syndrome (ACS) treated by deferred stenting strategy. METHODS AND RESULTS Patients were suitable for inclusion if they presented (i) an ACS that was successfully revascularized by manual thrombo-aspiration and (ii) ...

PURPOSE Automatically generated measurements of the retinal volume or the central retinal thickness are based on correctly set threshold lines on the retinal surface and the retinal pigment epithelium. The purpose of this study was to compare the accuracy of threshold algorithm lines of Stratus optical coherence tomography (OCT) with those of Cirrus OCT. METHODS A consecutive series of patien...

Optical coherence tomography (OCT) is a powerful biomedical imaging technology that relies on the coherent detection of backscattered light to image tissue morphology in vivo. As a consequence, OCT is susceptible to coherent noise (speckle noise), which imposes significant limitations on its diagnostic capabilities. Here we show speckle-modulating OCT (SM-OCT), a method based purely on light ma...

Organic cation transporter (OCT) function is critical for cellular homeostasis. C. elegans lacking OCT-1 displays a shortened lifespan and increased susceptibility to oxidative stress. We show that these phenotypes can be rescued by downregulating the OCT-1 paralogue, OCT-2. Herein, we delineate a biochemical pathway in C. elegans where uptake of genotoxic chemotherapeutics such as doxorubicin ...

Oct-4 is a transcription factor expressed in the pluripotent progenitor cells of the early mouse embryo. Additional factors are required for the distal activation of genes in differentiated cells containing ectopically expressed Oct-4. Here we show that Oct-4 and E1A are sufficient for distance-independent activation of the basal transcription machinery. The ratio of Oct-4 to E1A is critical fo...

Oct-6 is a POU domain transcription factor expressed in embryonal and neural tissues. Sequences for this protein were previously reported from mouse ES cells, termed Oct-6 (1,2), rat Schwann cells, termed SCIP (3) and rat testes, termed Tst-1 (4). Expression of Oct-6 was shown to be downregulated during embryonic stem cell differentiation and upregulated again in glia progenitor cells of the ce...

Conventional optical coherence tomography (OCT) systems generally have a limited imaging range within a depth of only 1-2 mm and suffers from unwanted noise such as speckle, ghost or mirror noise. To overcome these limitations, we developed a motorized-stage-based OCT system with an extended imaging range, using a common-path Fourier-domain optical coherence tomography (CP-FD-OCT) configuration...

Optical coherence tomography (OCT) has transformed diagnostic ophthalmic imaging but until recently has been limited to the clinic setting. The development of spectral-domain OCT (SD-OCT), with its improved speed and resolution, along with the development of a handheld OCT scanner, enabled portable imaging of patients unable to sit in a conventional tabletop scanner. This handheld SD-OCT unit h...