The Particularities of Using Enzymatic Debridement Therapy in Deep Burns Treatment According to Functional Regions

Author(s):  
Angela Tecuceanu ◽  
Teodor Stamate ◽  
Dan Cristian Moraru ◽  
Dobre Costel ◽  
Ilan Marcovici ◽  
...  
2019 ◽  
Vol 14 (2) ◽  
pp. 148-156
Author(s):  
Nighat Noureen ◽  
Sahar Fazal ◽  
Muhammad Abdul Qadir ◽  
Muhammad Tanvir Afzal

Background: Specific combinations of Histone Modifications (HMs) contributing towards histone code hypothesis lead to various biological functions. HMs combinations have been utilized by various studies to divide the genome into different regions. These study regions have been classified as chromatin states. Mostly Hidden Markov Model (HMM) based techniques have been utilized for this purpose. In case of chromatin studies, data from Next Generation Sequencing (NGS) platforms is being used. Chromatin states based on histone modification combinatorics are annotated by mapping them to functional regions of the genome. The number of states being predicted so far by the HMM tools have been justified biologically till now. Objective: The present study aimed at providing a computational scheme to identify the underlying hidden states in the data under consideration. </P><P> Methods: We proposed a computational scheme HCVS based on hierarchical clustering and visualization strategy in order to achieve the objective of study. Results: We tested our proposed scheme on a real data set of nine cell types comprising of nine chromatin marks. The approach successfully identified the state numbers for various possibilities. The results have been compared with one of the existing models as well which showed quite good correlation. Conclusion: The HCVS model not only helps in deciding the optimal state numbers for a particular data but it also justifies the results biologically thereby correlating the computational and biological aspects.


2020 ◽  
Vol 295 (13) ◽  
pp. 4252-4264 ◽  
Author(s):  
Chu Wang ◽  
Kaikai Zhang ◽  
Lina Meng ◽  
Xin Zhang ◽  
Yanan Song ◽  
...  

SAM and HD domain-containing protein 1 (SAMHD1) is a host factor that restricts reverse transcription of lentiviruses such as HIV in myeloid cells and resting T cells through its dNTP triphosphohydrolase (dNTPase) activity. Lentiviruses counteract this restriction by expressing the accessory protein Vpx or Vpr, which targets SAMHD1 for proteasomal degradation. SAMHD1 is conserved among mammals, and the feline and bovine SAMHD1 proteins (fSAM and bSAM) restrict lentiviruses by reducing cellular dNTP concentrations. However, the functional regions of fSAM and bSAM that are required for their biological functions are not well-characterized. Here, to establish alternative models to investigate SAMHD1 in vivo, we studied the restriction profile of fSAM and bSAM against different primate lentiviruses. We found that both fSAM and bSAM strongly restrict primate lentiviruses and that Vpx induces the proteasomal degradation of both fSAM and bSAM. Further investigation identified one and five amino acid sites in the C-terminal domain (CTD) of fSAM and bSAM, respectively, that are required for Vpx-mediated degradation. We also found that the CTD of bSAM is directly involved in mediating bSAM's antiviral activity by regulating dNTPase activity, whereas the CTD of fSAM is not. Our results suggest that the CTDs of fSAM and bSAM have important roles in their antiviral functions. These findings advance our understanding of the mechanism of fSAM- and bSAM-mediated viral restriction and might inform strategies for improving HIV animal models.


Burns ◽  
2021 ◽  
Author(s):  
Karel E.Y. Claes ◽  
Sarah Amar ◽  
Henk Hoeksema ◽  
Kornhaber Rachel ◽  
Alette de Jong ◽  
...  

Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 706
Author(s):  
Antonio J. Moreno-Pérez ◽  
Raquel Martins-Noguerol ◽  
Cristina DeAndrés-Gil ◽  
Mónica Venegas-Calerón ◽  
Rosario Sánchez ◽  
...  

Histone modifications are of paramount importance during plant development. Investigating chromatin remodeling in developing oilseeds sheds light on the molecular mechanisms controlling fatty acid metabolism and facilitates the identification of new functional regions in oil crop genomes. The present study characterizes the epigenetic modifications H3K4me3 in relationship with the expression of fatty acid-related genes and transcription factors in developing sunflower seeds. Two master transcriptional regulators identified in this analysis, VIV1 (homologous to Arabidopsis ABI3) and FUS3, cooperate in the regulation of WRINKLED 1, a transcriptional factor regulating glycolysis, and fatty acid synthesis in developing oilseeds.


1954 ◽  
Vol 27 (1) ◽  
pp. 45-54
Author(s):  
Seymour M. Farber ◽  
R. Daniel Gorman ◽  
David A. Wood ◽  
Orville F. Grimes ◽  
Samuel L. Pharr

2021 ◽  
Vol 68 ◽  
pp. 102276
Author(s):  
Dor Fridman ◽  
Thomas Koellner ◽  
Meidad Kissinger
Keyword(s):  

Trauma ◽  
2021 ◽  
pp. 146040862110025
Author(s):  
John Kiely ◽  
Ibrahim Natalwala ◽  
Joseph Stallard ◽  
Orla Austin ◽  
Umair Anwar ◽  
...  

Bromelain-based enzymatic debridement (ED) is a topical treatment that is growing in popularity for the non-surgical management of burn wounds. Although initially used for small injuries, experience has grown in using it for burns >15% Total Burns Surface Area (TBSA). A household explosion resulted in burns to multiple patients, with four requiring burn wound debridement. This case report demonstrates their management using ED. Four adult male patients were treated with ED, mean age 38.4 years. Their injuries ranged from 5–24% TBSA (mean 14.9%), with a high proportion of intermediate-deep dermal injury to their faces and limbs. Our centre has performed enzymatic debridement since 2016 and all senior burns surgeons and burns intensive care specialists in the team are experienced in its use. We perform enzymatic debridement using Nexobrid™ (Mediwound Ltd., Israel). Three patients were managed on a single theatre list, using ED for their burns at 19, 16 and 23 hours post-injury. One patient had ED of his injuries on intensive care at 18 hours. Patients with >15% TBSA were treated in a critical care setting with goal directed fluid therapy. Through the use of enzymatic debridement we were able to achieve burn debridement for four patients in under 24 hours. While not a true mass casualty incident, our experience suggests that for an appropriately resourced service it is likely to have advantages in this scenario. We suggest that burns services regularly using this technique consider inclusion into mass casualty protocols, with training to staff to enable provision in such an incident.


Sign in / Sign up

Export Citation Format

Share Document