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Topic Review
Hydrogel-Forming Microneedles
Controlled drug delivery in the oral cavity poses challenges such as bacterial contamination, saliva dilution, and inactivation by salivary enzymes upon ingestion. Microneedles offer a location-specific, minimally invasive, and retentive approach. Hydrogel-forming microneedles (HFMs) have emerged for dental diagnostics and therapeutics. HFMs penetrate the stratum corneum, undergo swelling upon contact, secure attachment, and enable sustained transdermal or transmucosal drug delivery. Commonly employed polymers such as polyvinyl alcohol (PVA) and polyvinyl pyrrolidone are crosslinked with tartaric acid or its derivatives while incorporating therapeutic agents. Microneedle patches provide suture-free and painless drug delivery to keratinized or non-keratinized mucosa, facilitating site-specific treatment and patient compliance. 
  • 465
  • 24 Aug 2023
Topic Review
Hypoxia-Inducible Factors and Immunosenescence
Hypoxia activates hypoxia-related signaling pathways controlled by hypoxia-inducible factors (HIFs). HIFs represent a quick and effective detection system involved in the cellular response to insufficient oxygen concentration.
  • 164
  • 23 Aug 2023
Topic Review
PARP1 in Homeostasis and Tumorigenesis
Detailing the connection between homeostatic functions of enzymatic families and eventual progression into tumorigenesis is crucial to the understanding of anti-cancer therapies. One key enzyme group involved in this process is the Poly (ADP-ribose) polymerase (PARP) family, responsible for an expansive number of cellular functions, featuring members well established as regulators of DNA repair, genomic stability and beyond. Several PARP inhibitors (PARPi) have been approved for clinical use in a range of cancers, with many more still in trials. Unfortunately, the occurrence of resistance to PARPi therapy is growing in prevalence and requires the introduction of novel counter-resistance mechanisms to maintain efficacy.
  • 166
  • 22 Aug 2023
Topic Review
Energy-Saving Mechanism in Skeletal Muscle
Exercise produces oxidants from a variety of intracellular sources, including NADPH oxidases (NOX) and mitochondria. Exercise-derived reactive oxygen species (ROS) are beneficial, and the amount and location of these ROS is important to avoid muscle damage associated with oxidative stress.
  • 288
  • 22 Aug 2023
Topic Review
Inflammation Leads to Skeletal Muscle Wasting in COPD
Inflammation is one of the primary drivers of skeletal muscle wasting in Chronic Obstructive Pulmonary Disease (COPD), through its catabolic effects.
  • 207
  • 18 Aug 2023
Topic Review
Pol II Pausing during Daily Gene Transcription
Clock proteins and their collaborating transcription factors often act as distal enhancers to regulate the rhythmic transcription of gene promoters. Those transcription factors need to interact with the mediator complex and general transcription factors near the transcription start site to finally control transcription. Pol II pausing, which is determined by Pol II recruitment, pause release, and premature transcription termination near the transcription start site, plays a critical role in influencing the final transcription output.
  • 198
  • 17 Aug 2023
Topic Review
Proteins of the Nucleolus of Dictyostelium discoideum
The nucleolus is a multifunctional subnuclear compartment that has been studied for more than 200 years. The nucleoli of Dictyostelium discoideum have a comparatively unique, non-canonical, localization adjacent to the inner nuclear membrane. The verified nucleolar proteins of this eukaryotic microbe are detailed while other potential proteins are introduced. Heat shock protein 32 (Hsp32), eukaryotic translation initiation factor 6 (eIF6), and tumour necrosis factor receptor-associated protein 1 (TRAP1) are essential for cell survival. NumA1, a breast cancer type 1 susceptibility protein-C Terminus domain-containing protein linked to cell cycle, functions in the regulation of nuclear number. 
  • 231
  • 16 Aug 2023
Topic Review
Influence of Heat Stress on Chicken Immune System
Heat stress (HS) in poultry husbandry is an important stressor and with increasing global temperatures its importance will increase. The negative effects of stress on the quality and quantity of poultry production are described in a range of research studies.
  • 254
  • 16 Aug 2023
Topic Review
N-Terminal Methionine Excision
In the cytosol of human cells, when a newly synthesized polypeptide emerges from the ribosomes, its fate can be determined by the enzymes that modify its N-terminal α-amino acid residue (Nα). These N-terminal modifications include excision of the initiator methionine (iMet), Nα-myristoylation, Nα-acetylation, Nα-methylation, and other less common modification events. Methionine aminopeptidases (MetAPs) are responsible for N-terminal iMet excision (NME).
  • 241
  • 14 Aug 2023
Topic Review
Mechanisms of Myofibroblast Formation
At least three local events are needed to generate mature α-SMA-positive, fully differentiated myofibroblasts: (i) biologically active TGF-β1; (ii) extracellular stress, arising from the mechanical properties of the ECM (particularly collagen) and EDA–FN/integrin interactions; and (iii) the precursory production of phenotypic modulators (EDA–FN, HA) following activation. Increasing evidence strongly supports the role of inflammatory cell interactions in promoting myofibroblast development. Regardless of the origin, the resultant myofibroblast cells share the same properties and signalling cascade events that led to their formation.
  • 263
  • 11 Aug 2023
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