This study analyzes the expression and the function of Xenopus msx-1 (Xmsx-1) in embryos, in relation to the ventralizing activity of bone morphogenetic protein-4 (BMP-4). Expression of Xmsx-1 was increased in UV-treated ventralized embryos and decreased in LiCl-treated dorsalized embryos at the neurula stage (stage 14). Whole-mount in situ hybridization analysis showed that Xmsx-1 is expressed...

Herpesvirus recovery from normal and experimentally infected simian tissues prepared into 10 to 20% homogenates was compared with that obtained by explanting these same tissues. The explant procedure was by far the more sensitive of the two methods. As a result, 8 herpesvirus isolations were obtained by conventional virus isolation procedures in contrast to 74 isolates when explants were made f...

Tracking molecular dynamics in single cells in vivo is instrumental to understanding how cells act and interact in tissues. Current tissue imaging approaches focus on short-term observation and typically nonendogenous or implanted samples. Here we develop an experimental and computational setup that allows for single-cell tracking of a transcriptional reporter over a period of >1 wk in the cont...

An in vitro system was used to study the regulation of glucose and acetate utilization by bovine and ovine adipose tissue (AT). Adult nonlactating, nonpregnant cows ( n = 5 ) and ewes ( n = 5 were given limited amounts of feed for 8 to 10 d, then overfed for 10 (ewes) or 21 (cows) d. Perirenal AT explants were incubated for 7 d. The effect of 2 mu/ mL of insulin on glucose utilization was signi...

BACKGROUND Apoptosis occurs in late secretory and menstrual human endometrium and is thought to play an important role in endometrial physiology. Menstrual-like breakdown has been observed in vitro in endometrial explants. The purpose of this study was to assess the role of apoptosis in menstrual-like breakdown in human endometrial explants. METHODS Human endometrial tissue was obtained durin...

Pancreatic explants from perinatal or 1-week-old rat circumfusion organ cultured with an insulin-free variant of Trowell's Medium T8 survive functionally, as judged from tissue amylase content, for about 3 days. When hydrocortisone 21-sodium succinate, 1.0 mg/liter, is added to the chemically defined medium, high levels of anylase persist for longer periods. Explants from 7-day-old animals, cir...