OBJECTIVE This study investigated whether any genomic change occurs in DNA level in ankylosing spondylitis (AS) by measuring sister chromatid exchange (SCE) frequency. METHODS SCE frequency was detected on metaphase chromosomes obtained from peripheral blood lymphocyte cultures in 15 patients diagnosed as having AS. SCE values were also obtained from 15 healthy subjects as a control group. SC...

Acute interstitial pneumonia (AIP) is a rapidly progressive condition of unknown cause that occurs in a previously healthy individual and produces the histologic findings of diffuse alveolar damage. Since the term AIP was first introduced in 1986, there have been very few case reports of AIP in children. Here we present a case of AIP in a 3-yr-old girl whose other two siblings showed similar ra...

BACKGROUND Cohesin proteins link sister chromatids and provide the basis for tension between bioriented sister chomatids in mitosis. Cohesin is concentrated at the centromere region of the chromosome despite the fact that sister centromeres can be separated by 800 nm in vivo. The function of cohesin at sites of separated DNA is unknown. RESULTS We provide evidence that the kinetochore promote...

The relationships at the root of the animal tree have proven difficult to resolve, with the current debate focusing on whether sponges (phylum Porifera) or comb jellies (phylum Ctenophora) are the sister group of all other animals [1-5]. The choice of evolutionary models seems to be at the core of the problem because Porifera tends to emerge as the sister group of all other animals ("Porifera-s...

Following DNA replication, sister chromatids must stay connected for the remainder of the cell cycle in order to ensure accurate segregation in the subsequent cell division. This important function involves an evolutionarily conserved protein complex known as cohesin; any loss of cohesin causes premature sister chromatid separation in mitosis. Here, we examined the role of cohesin in sister chr...

Sister chromatid exchanges, a sensitive measure of chromosome damage, were counted in peripheral blood lymphocytes from 23 patients with juvenile chronic arthritis receiving long term, low dose chlorambucil treatment. Thirty five patients with juvenile chronic arthritis who had not been treated with cytotoxic drugs served as controls. All of the treated patients have cells with abnormal sister ...

How do cells ensure that sister chromatids are precisely partitioned in mitosis? New studies on budding yeast have revealed that sister chromatid separation at anaphase requires endoproteolytic cleavage of a protein that maintains the association between sister chromatids.

www.landesbioscience.com Cell Cycle 3703 microRNAs (miRNAs) are short noncoding RNAs of ~22 nucleotides that negatively regulate gene expression at the post-transcriptional level. In general, miRNAs bind to the 3′ untranslated region (UTR) of its target mRNA via sequenceguided specific recognition to trigger mRNA degradation or translational repression. The biogenesis of a miRNA enables transcr...

The abilities of Min U Sil quartz or tridymite particles to induce sister chromatid exchanges (SCEs) in cultures of human lymphocytes plus monocytes or of human purified lymphocytes were investigated. With cultures of lymphocytes plus monocytes the level of SCEs was significantly enhanced after treatment with tridymite at the highest dose tested (50 micrograms/cm2). No effect was observed with ...

D. Pedro, Duke of Coimbra, was killed in Alfarrobeira when he heading to the kingdom’s capital with his army and son Jaime order capture city. He severely punished along sons supporters punishment damnatio memoriae confiscation right property. Among siblings who strove most for rehabilitation defeated are, not Henrique, but rather Isabel, fraternal sister former regent friendly aunt her nephews...