Proteína CLK2 (Cdc-2-like kinase 2) no hipotálamo é importante para a manutenção da homeostase energética

Author(s):  
Paula Gabriele Fernandes Quaresma
Keyword(s):  
PEDIATRICS ◽  
1995 ◽  
Vol 96 (2) ◽  
pp. 360-361
Author(s):  

Prevention of disease through immunization always has been a priority for pediatricians and a major goal of comprehensive pediatric health care. Before 1994, the recommendation of the American Academy of Pediatrics (AAP) was that children should be completely immunized against diphtheria, tetanus, pertussis, poliomyelitis, Haemophilus influenzae type b disease, measles, mumps, and rubella. Universal hepatitis B immunization of all infants and adolescents was recommended in the 1994 Red Book,1 adding a ninth disease to the previous list. Only those children with specific contraindications to one or more of the immunizations should be excluded. Childhood immunizations, per the AAP recommended schedule, must continue to be an essential component of continuous, comprehensive child health care. Furthermore, a child's immunization status warrants evaluation at every health care visit. In recent years, inadequate immunization rates attributed to multiple causes have indicated that the Academy's original immunization policy (1977) calling for universal immunization of all children has not been fulfilled. From data collected in the National Health Interview Survey in 1993 and 1994, the Centers for Disease Control and Prevention (CDC)2 currently estimates that only about two thirds of 2-year-old children in the United States have received all appropriate immunizations. Vaccine coverage levels include the following ranges: 67% coverage for four doses of diphtheria, tetanus, and pertussis (DPT) vaccine; 76% for three doses of oral polio vaccine (OPV); 90% for one dose of measles, mumps, and rubella vaccine (MMR), and 71% for age-appropriate doses of H influenzae type b vaccine. Recent outbreaks of measles, particularly in preschool children but also in adolescents and young adults, attest to inadequate protection and demonstrate a continuing need for surveillance and modification of current immunization recommendations.


2009 ◽  
Vol 9 (4) ◽  
pp. 502-513 ◽  
Author(s):  
Efrat Dvash ◽  
Galia Kra-Oz ◽  
Carmit Ziv ◽  
Shmuel Carmeli ◽  
Oded Yarden

ABSTRACT Neurospora crassa dbf-2 encodes an NDR (nuclear Dbf2-related) protein kinase, homologous to LATS1, a core component of the Hippo pathway. This pathway plays important roles in restraining cell proliferation and promoting apoptosis in differentiating cells. Here, we demonstrate that DBF-2 is involved in three fundamental processes in a filamentous fungus: cell cycle regulation, glycogen biosynthesis, and conidiation. DBF-2 is predominantly localized to the nucleus, and most (approximately 60%) dbf-2 null mutant nuclei are delayed in mitosis, indicating that DBF-2 activity is required for properly completing the cell cycle. The dbf-2 mutant exhibits reduced basal hyphal extension rates accompanied by a carbon/nitrogen ratio-dependent bursting of hyphal tips, vast glycogen leakage, defects in aerial hypha formation, and impairment of all three asexual conidiation pathways in N. crassa. Our findings also indicate that DBF-2 is essential for sexual reproduction in a filamentous fungus. Defects in other Hippo and glycogen metabolism pathway components (mob-1, ccr-4, mst-1, and gsk-3) share similar phenotypes such as mitotic delay and decreased CDC-2 (cell division cycle 2) protein levels, massive hyphal swellings, hyphal tip bursting, glycogen leakage, and impaired conidiation. We propose that DBF-2 functions as a link between Hippo and glycogen metabolism pathways.


1996 ◽  
Vol 270 (5) ◽  
pp. L879-L888 ◽  
Author(s):  
F. Wu ◽  
S. Buckley ◽  
K. C. Bui ◽  
A. Yee ◽  
H. Y. Wu ◽  
...  

We postulated that contact inhibition and transforming growth factor (TGF)-beta 1 may target the same molecules to negatively regulate the Mv1Lu cell cycle in G0/G1. Both contact inhibition and TGF-beta 1 suppressed the expression of a 45-kDa protein (p45); cyclins D2 and B1; cyclin-dependent protein kinase (Cdk)-4, Cdc-2, and Cdc-2-associated activity; and the phosphorylation of retinoblastoma tumor-suppressor protein (pRb) but did not affect the expression of cyclins D1, E, and A or the expression of Cdk-2 and Cdk-5. Expression of p45 reappeared 12 h after release from contact inhibition and 6-8 h after release from TGF-beta 1, while TGF-beta 1 prevented release from contact inhibition and maintained suppression of both p45 and cyclin D2. Additionally, cyclin D2 phosphorylation and its associated kinase activity were strongly inhibited by contact inhibition and TGF-beta 1. Thus suppression of p45, cyclin D2/Cdk-4, and cyclin B1/Cdc-2 expression and/or activities is targeted both by contact inhibition and by TGF-beta 1 and may define common mechanisms through which these negative growth signals are integrated.


2005 ◽  
Vol 204 (3) ◽  
pp. 785-791 ◽  
Author(s):  
Huynh Hung ◽  
Chow Kad Hoe Pierce ◽  
Soo Khee Chee ◽  
Panasci Lawrence ◽  
Nguyen Thanh Hung
Keyword(s):  

Polyhedron ◽  
2006 ◽  
Vol 25 (5) ◽  
pp. 1209-1214 ◽  
Author(s):  
Dulce Belo ◽  
César Rodrigues ◽  
Isabel C. Santos ◽  
Susana Silva ◽  
Teresa Eusébio ◽  
...  

2007 ◽  
Vol 56 (6) ◽  
pp. 715-721 ◽  
Author(s):  
Hsi Liu ◽  
Berta Rodes ◽  
Robert George ◽  
Bret Steiner

The acidic repeat protein (arp) genes from three subspecies of the treponeme Treponema pallidum (T. pallidum subsp. pallidum, Nichols strain; T. pallidum subsp. pertenue, CDC-1 and CDC-2 strains; and T. pallidum subsp. endemicum, Bosnia A strain) were cloned and sequenced. The predicted protein sequence contained a high percentage of glutamic acid, hence the name acidic repeat protein, or Arp. The protein had a potential membrane-spanning domain and a signal peptidase I site. The gene from the Nichols strain of T. pallidum subsp. pallidum contained a set of 14 nearly identical repeats of a 60 bp sequence, which occupied ∼51 % of the length of the gene. Analyses of arp from laboratory strains showed that the 5′ and 3′ ends of the genes were conserved, but there was considerable heterogeneity in the number of repeats of this 60 bp sequence. Based on amino acid variations, the 14 sequence repeats could be classified into three types, which were named type I, type II and type III repeats. The type II repeat was the most common in the strains examined. The arp gene of the Nichols strain was subsequently cloned into the expression vector pBAD/TOPO ThioFusion. The expressed protein was detected in a Western blot assay using rabbit immune sera produced against T. pallidum, or synthetic peptides derived from the repeat sequences. Using an ELISA, rapid plasma reagin (RPR) test-positive sera reacted with synthetic peptides derived from the repeat region but not with peptides derived from N and C termini of the Arp protein. These results show that the Arp protein is immunogenic and could prove to be a useful target for serological diagnosis of T. pallidum infection.


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