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Topic Review
Alternatively Spliced Isoforms in MAPK Signaling
The mitogen-activated protein kinase (MAPK) cascades are key signaling components  that transmit signals to many cellular processes. Each of the cascades operates by a sequential activation of protein kinases organized in three or more tiers that provide a seemingly linear signal transmission. However, the cellular effects regulated by each cascade may vary significantly. To achieve these diverse effects, the specificity of each cascade is extended by distinct regulators.  Here we describe the importance of having distinct components in each tier of the cascades, particularly alternatively spliced isoforms of the MAPK components. This mode of regulation extends the cascade’s specificity and allows accurate, fine-tuned signaling outcomes that lead to proper cell fates. 
  • 652
  • 28 Jan 2022
Topic Review
Alternative Splicing Mechanisms in Tumors
Alternative pre-mRNA splicing is a process that allows for the generation of an extremely diverse proteome from a much smaller number of genes. In this process, non-coding introns are excised from primary mRNA and coding exons are joined together. Different combinations of exons give rise to alternative versions of a protein.
  • 334
  • 06 Jun 2023
Topic Review
Alternative Splicing in Cancer and Immune Cells
Splicing is a phenomenon enabling the excision of introns from pre-mRNA to give rise to mature mRNA. All the 20,000 genes of the human genome are concerned by this mechanism. Nevertheless, it is estimated that the proteome is composed of more than 100,000 proteins. How to go from 20,000 genes to more than 100,000 proteins? Alternative splicing (AS) is in charge of this diversity of proteins. AS which is found in most of the cells of an organism, participates in normal cells and in particular in immune cells, in the regulation of cellular behavior. In cancer, AS is highly dysregulated and involved in almost all of the hallmarks that characterize tumor cells.
  • 675
  • 06 Apr 2022
Topic Review
Alternative Lengthening of Telomeres and Cancer Treatment
Telomeres are non-coding short repeat sequences (TTAGGG in vertebrates) which in combination with shelterin proteins protect the ends of linear chromosomes from degradation, recombination, and end fusions. Human telomeres range from 5–15 kb in length. Human Alternative Lengthening of Telomeres (ALT) cancers are often present as mesenchymal or epithelial origin in subsets of osteosarcomas, liposarcomas, glioblastomas, or astrocytomas.
  • 510
  • 06 Apr 2023
Topic Review
Alternate Causes for Pathogenesis of Exfoliation Glaucoma
Exfoliation glaucoma (XFG) is the most recognizable form of secondary open-angle glaucoma associated with a high risk of blindness. This disease is characterized by white flaky granular deposits in the anterior chamber that leads to the elevation of intraocular pressure (IOP) and subsequent glaucomatous optic nerve damage. Conventionally, XFG is known to respond poorly to medical therapy, and surgical intervention is the only management option in most cases.
  • 397
  • 11 Mar 2022
Topic Review
Altered Glucose Dependency in Drug-Resistant Cancer Cells
A chemotherapeutic approach is crucial in malignancy management, which is often challenging due to the development of chemoresistance. Over time, chemo-resistant cancer cells rapidly repopulate and metastasize, increasing the recurrence rate in cancer patients. Targeting these destined cancer cells is more troublesome for clinicians, as they share biology and molecular cross-talks with normal cells. 
  • 169
  • 22 Sep 2023
Topic Review
Alpha-Thalassemia
Alpha-thalassemia (α-thalassemia, α-thalassaemia) is a form of thalassemia involving the genes HBA1 and HBA2. Thalassemias are a group of inherited blood conditions which result in the impaired production of hemoglobin, the molecule that carries oxygen in the blood. Normal hemoglobin consists of two alpha chains and two beta chains; in alpha-thalassemia, there is a quantitative decrease in the amount of alpha chains, resulting in fewer normal hemoglobin molecules. Furthermore, alpha-thalassemia leads to the production of unstable beta globin molecules which cause increased red blood cell destruction. The degree of impairment is based on which clinical phenotype is present (how many genes are affected).
  • 601
  • 31 Oct 2022
Topic Review
Alpha Thalassemia Abnormal Morphogenesis
Alpha Thalassemia-Abnormal Morphogensis is a group of blood disorders that affect the way the body makes hemoglobin. Hemoglobin is a protein found in red blood cells that carries oxygen throughout the body. It's made up of alpha globin and beta globin. Normally each person has four genes for alpha globin, Alpha thalassemia happens when one or more of the genes that control the making of alpha globin is absent or defective. It can cause anemia ranging from mild to severe. Also causing Genital abnormalities and terminal transverse limb defectiveness which is why it is called abnormal morphogenesis. This is most commonly found in people of African, Middle Eastern, Chinese, Southeast Asian and occasionally, Mediterranean descent.
  • 397
  • 29 Sep 2022
Topic Review
All-Russian Collection of Plant Cell Cultures
The collections of plant cell cultures maintained in vitro are valuable sources of strains with unique ecological and biotechnological traits. Such collections play a vital role in bioresource conservation, science, and industry development. Here is an overview of All-Russian Collection of Plant Cell Cultures at the Institute of Plant Physiology of the Russian Academy of Sciences (IPPRAS). The total collection holdings comprise about 120 cell cultures of medicinal and model plant species. Several plant cell culture strains have been adapted for cultivation in bioreactors from laboratory (5–20-L) to pilot (75-L) to semi-industrial (630-L) scale for the production of biomass with high nutritive or pharmacological value. Some of the strains with proven biological activities are currently used to produce cosmetics and food supplements. Here is also provided a brief information on the current collection composition and major activities, their use in research, biotechnology, and commercial application. The most interesting studies performed with collection strains were highlighted.
  • 381
  • 04 Jul 2023
Topic Review
Aldosterone
Aldosterone is a steroid hormone that is produced in the adrenal cortex. Its major renal effect is to regulate electrolyte and water homeostasis in the distal tubule, thus maintaining blood pressure and extracellular fluid homeostasis through the activation of mineralocorticoid receptors (MR) in epithelial cells [2]. Aldosterone enters an epithelial cell and binds to the MR. The complex of aldosterone and MR translocates into the nucleus and regulates gene transcription of, among others, the epithelial sodium channel (ENaC) and the signaling proteins and kinases that impact channel and transporter activity, such as serum/glucocorticoid kinases (SGKs).
  • 1.8K
  • 30 Oct 2020
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