TY  - JOUR
A1  - Rodríguez-Mari, Adriana
A1  - Wilson, Catherine
A1  - Titus, Tom A.
A1  - Canestro, Cristian
A1  - BreMiller, Ruth A.
A1  - Yan, Yi-Lin
A1  - Nanda, Indrajit
A1  - Johnston, Adam
A1  - Kanki, John P.
A1  - Gray, Erin M.
A1  - He, Xinjun
A1  - Spitsbergen, Jan
A1  - Schindler, Detlev
A1  - Postlethwait, John H.
T1  - Roles of brca2 (fancd1) in Oocyte Nuclear Architecture, Gametogenesis, Gonad Tumors, and Genome Stability in Zebrafish
JF  - PLoS Genetics
N2  - Functional near-infrared spectroscopy (fNIRS) is an established optical neuroimaging method for measuring functional hemodynamic responses to infer neural activation. However, the impact of individual anatomy on the sensitivity of fNIRS measuring hemodynamics within cortical gray matter is still unknown. By means of Monte Carlo simulations and structural MRI of 23 healthy subjects (mean age: (25.0 +/- 2.8) years), we characterized the individual distribution of tissue-specific NIR-light absorption underneath 24 prefrontal fNIRS channels. We, thereby, investigated the impact of scalp-cortex distance (SCD), frontal sinus volume as well as sulcal morphology on gray matter volumes (V(gray)) traversed by NIR-light, i.e. anatomy-dependent fNIRS sensitivity. The NIR-light absorption between optodes was distributed describing a rotational ellipsoid with a mean penetration depth of (23.6 +/- 0.7) mm considering the deepest 5% of light. Of the detected photon packages scalp and bone absorbed (96.4 +/- 9: 7)% and V(gray) absorbed (3.1 +/- 1.8)% of the energy. The mean V(gray) volume (1.1 +/- 0.4)cm(3) was negatively correlated (r = - .76) with the SCD and frontal sinus volume (r = - .57) and was reduced by 41.5% in subjects with relatively large compared to small frontal sinus. Head circumference was significantly positively correlated with the mean SCD (r = .46) and the traversed frontal sinus volume (r = .43). Sulcal morphology had no significant impact on V(gray). Our findings suggest to consider individual SCD and frontal sinus volume as anatomical factors impacting fNIRS sensitivity. Head circumference may represent a practical measure to partly control for these sources of error variance.
KW  - oocytes
KW  - zebrafish
KW  - genetic causes of cancer
KW  - testes
KW  - apoptosis
KW  - gonads
KW  - sperm
KW  - embryos
Y1  - 2011
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-142285
VL  - 7
IS  - 3
ER  - 
TY  - JOUR
A1  - Schartl, Manfred
A1  - Walter, Ronald B.
A1  - Shen, Yingjia
A1  - Garcia, Tzintzuni
A1  - Catchen, Julian
A1  - Amores, Angel
A1  - Braasch, Ingo
A1  - Chalopin, Domitille
A1  - Volff, Jean-Nicolas
A1  - Lesch, Klaus-Peter
A1  - Bisazza, Angelo
A1  - Minx, Pat
A1  - Hillier, LaDeana
A1  - Wilson, Richard K.
A1  - Fürstenberg, Susan
A1  - Boore, Jeffrey
A1  - Searle, Steve
A1  - Postlethwait, John H.
A1  - Warren, Wesley C.
T1  - The genome of the platyfish, Xiphophorus maculatus, provides insights into evolutionary adaptation and several complex traits
JF  - Nature Genetics
N2  - Several attributes intuitively considered to be typical mammalian features, such as complex behavior, live birth and malignant disease such as cancer, also appeared several times independently in lower vertebrates. The genetic mechanisms underlying the evolution of these elaborate traits are poorly understood. The platyfish, X. maculatus, offers a unique model to better understand the molecular biology of such traits. We report here the sequencing of the platyfish genome. Integrating genome assembly with extensive genetic maps identified an unexpected evolutionary stability of chromosomes in fish, in contrast to in mammals. Genes associated with viviparity show signatures of positive selection, identifying new putative functional domains and rare cases of parallel evolution. We also find that genes implicated in cognition show an unexpectedly high rate of duplicate gene retention after the teleost genome duplication event, suggesting a hypothesis for the evolution of the behavioral complexity in fish, which exceeds that found in amphibians and reptiles.
KW  - genomics
KW  - genomic analysis
KW  - evolutionary biology
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-132152
VL  - 45
IS  - 5
ER  -