Dissociation of CAK from Core TFIIH Reveals a Functional Link between XP-G/CS and the TFIIH Disassembly State

Transcription factor II H (TFIIH) is comprised of core TFIIH and Cdk-activating kinase (CAK) complexes. Here, we investigated the molecular and cellular manifestation of the TFIIH compositional changes by XPG truncation mutations. We showed that both core TFIIH and CAK are rapidly recruited to damage sites in repair-proficient cells. Chromatin immunoprecipitation against TFIIH and CAK components revealed a physical engagement of CAK in nucleotide excision repair (NER). While XPD recruitment to DNA damage was normal, CAK was not recruited in severe XP-G and XP-G/CS cells, indicating that the associations of CAK and XPD to core TFIIH are differentially affected. A CAK inhibition approach showed that CAK activity is not required for assembling pre-incision machinery in vivo or for removing genomic photolesions. Instead, CAK is involved in Ser5-phosphorylation and UV-induced degradation of RNA polymerase II. The CAK inhibition impaired transcription from undamaged and UV-damaged reporter, and partially decreased transcription of p53-dependent genes. The overall results demonstrated that a) XP-G/CS mutations affect the disassembly state of TFIIH resulting in the dissociation of CAK, but not XPD from core TFIIH, and b) CAK activity is not essential for global genomic repair but involved in general transcription and damage-induced RNA polymerase II degradation

The HOG Pathway Dictates the Short-Term Translational Response after Hyperosmotic Shock

In the global osmoshock translational response in yeast, some gene products were translationally mobilized without transcriptional up-regulation. Conversely, other transcriptionally up-regulated mRNAs were translationally inhibited. Analogous changes occurred on the protein level. These translational responses were strongly dependent on Hog1 and Rck2

Interet de la peniscopie lors de lesions condylomateuses ou dysplasiques chez la femme. [Value of penis endoscopy in sexual partners of women with condylomatous or dysplastic lesions]

TYPE OF STUDY. A retrospective study of 532 male sexual partners of patients who were examined for condylomatous or dysplasic lesions of the lower genital tract between January 1990 and June 1993. AIM. To evaluate the balanoscopy examination. The value of this examination for the follow-up of papilloma virus and dysplasic lesions in women. METHOD. Balanoscopy was performed after application of acetic acid (5%). Lesions were treated with viralytic agents or by CO2 laser destruction. Computer analysis of the data from the microscopic examination and treatment in partners was performed. MAIN RESULTS. Globally, peniscopy revealed a papilloma virus lesion in 43.3% of the cases. Nevertheless, for infectious lesions (condylomas) in women, 63% of the women had a papilloma virus lesions. CONCLUSION. Severe dysplasia of the penis is rare in our geographical area and balanoscopy is useful for the eradication of sexually transmitted diseases, sometimes for oncological examinations and to decrease the incidence of recurrent condylomatous or dysplasic lesions in women partners. Globally, the results are disappointing since the rate of recurrence was similar whether or not the male partner had been examined. The only difference was in case of rapid effective treatment in the partner which was obtained in 27% of the partners

Effect of rehabilitation and botulinum toxin injection on gait in chronic stroke patients: A randomized controlled study

International audienceBackground: Botulinum toxin injections are used to treat spasticity in stroke. Although this treatment is effective on muscle tone, its effect on functional gait-related activities remains uncertain.Objective: The aim of this randomized controlled trial was to determine the effect of a self-rehabilitation programme as an adjunct to botulinum toxin injections on gait-related activities in patients with chronic hemiparesis.Methods: Thirty-five outpatients were included. Each patient was randomized to 1 of 2 groups: botulinum toxin + standardized self-rehabilitation programme (R group, n = 19) or botulinum toxin alone (C group, n = 16). Each patient was evaluated with the following tests before botulinum toxin injections and one month afterwards: 10-m timed walk, Timed Up and Go, distance covered in 6 min over an ecological circuit, and the stair test.Results: There were significant improvements in the R group compared with the C group: maximal gait speed improved by 8% (p = 0.003); distance covered in 6 min over an ecological circuit increased by 7.1% (p = 0.01); and time to ascend and to descend a flight of stairs decreased by 9.8% (p = 0.003) and 6.6% (p = 0.009), respectively. The self-rehabilitation programme was well tolerated and safe.Conclusion: These results strongly suggest that a standardized self-rehabilitation programme constitutes a useful adjunct to botulinum toxin injections in order to improve gait-related activitie

Substituted N-heterocyclic carbene PEPPSI-type palladium complexes with different N-coordinated ligands: Involvement in the direct C H bond activation of heteroarenes derivatives with aryl bromide and their antimicrobial, anti-inflammatory and antioxidant activities

International audienc