Page last updated: 2024-10-24

positive regulation of activated T cell proliferation

Definition

Target type: biologicalprocess

Any process that activates or increases the rate or extent of activated T cell proliferation. [GOC:jl]

Positive regulation of activated T cell proliferation is a complex biological process that involves a series of intricate signaling events, ultimately leading to the expansion of activated T lymphocytes. This process is critical for mounting effective immune responses against pathogens and maintaining immune homeostasis.

Upon encountering their cognate antigen presented by antigen-presenting cells (APCs), naive T cells become activated. This activation triggers a cascade of intracellular signaling pathways that drive T cell proliferation, differentiation, and effector functions. The key signaling pathways involved include:

1. TCR signaling: Engagement of the T cell receptor (TCR) by antigen presented on MHC molecules initiates a signaling cascade involving several intracellular proteins, such as Lck, ZAP-70, and LAT. These proteins activate downstream signaling pathways, including the MAPK and PI3K pathways.

2. Costimulatory signaling: T cell activation also requires costimulatory signals delivered by APCs through molecules like CD28. CD28 binding to its ligands CD80 and CD86 on APCs amplifies TCR signaling and promotes T cell survival and proliferation.

3. Cytokine signaling: Activated T cells produce and respond to various cytokines, such as IL-2, IL-4, IL-7, and IL-15. These cytokines play crucial roles in T cell proliferation, survival, differentiation, and effector function.

The combined activation of these signaling pathways leads to the expression of various genes that promote T cell proliferation, including the transcription factor c-Myc and the cell cycle regulator cyclin D1. These proteins induce cell cycle progression, leading to DNA replication and cell division.

In addition to these signaling events, T cell proliferation requires the presence of essential nutrients, growth factors, and a suitable microenvironment. The interaction between T cells and APCs within the lymph nodes provides an optimal environment for T cell activation and proliferation.

Positive regulation of activated T cell proliferation is tightly controlled by a complex network of regulatory mechanisms. These mechanisms ensure that T cell responses are appropriate in magnitude and duration and prevent uncontrolled immune activation. Dysregulation of these regulatory mechanisms can lead to autoimmune diseases and other immune disorders.

The precise molecular mechanisms underlying positive regulation of activated T cell proliferation are still being elucidated. However, ongoing research provides valuable insights into the intricate signaling pathways and regulatory mechanisms governing T cell activation and expansion.'
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Proteins (7)

ProteinDefinitionTaxonomy
Advanced glycosylation end product-specific receptorAn advanced glycosylation end product-specific receptor that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q15109]Homo sapiens (human)
Serine/threonine-protein phosphatase 2B catalytic subunit alpha isoformA protein phosphatase 3 catalytic subunit alpha that is encoded in the genome of human. [PRO:CNA, UniProtKB:Q08209]Homo sapiens (human)
Interleukin-2An interleukin-2 that is encoded in the genome of human. [PRO:CNA, UniProtKB:P60568]Homo sapiens (human)
Signal transducer and activator of transcription 5BA signal transducer and activator of transcription 5b that is encoded in the genome of human. [PRO:WCB, UniProtKB:P51692]Homo sapiens (human)
40S ribosomal protein S3A eukaryotic-type small ribosomal subunit protein uS3 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P23396]Homo sapiens (human)
Insulin-like growth factor-binding protein 2An insulin-like growth factor-binding protein 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P18065]Homo sapiens (human)
High mobility group protein B1A high mobility group protein B1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P09429]Homo sapiens (human)

Compounds (24)

CompoundDefinitionClassesRoles
salicylic acidScalp: The outer covering of the calvaria. It is composed of several layers: SKIN; subcutaneous connective tissue; the occipitofrontal muscle which includes the tendinous galea aponeurotica; loose connective tissue; and the pericranium (the PERIOSTEUM of the SKULL).monohydroxybenzoic acidalgal metabolite;
antifungal agent;
antiinfective agent;
EC 1.11.1.11 (L-ascorbate peroxidase) inhibitor;
keratolytic drug;
plant hormone;
plant metabolite
quinolinic acidpyridinedicarboxylic acid : Any member of the class of pyridines carrying two carboxy groups.

quinolinic acid : A pyridinedicarboxylic acid that is pyridine substituted by carboxy groups at positions 2 and 3. It is a metabolite of tryptophan.

Quinolinic Acid: A metabolite of tryptophan with a possible role in neurodegenerative disorders. Elevated CSF levels of quinolinic acid are correlated with the severity of neuropsychological deficits in patients who have AIDS.
pyridinedicarboxylic acidEscherichia coli metabolite;
human metabolite;
mouse metabolite;
NMDA receptor agonist
diflunisaldiflunisal : An organofluorine compound comprising salicylic acid having a 2,4-difluorophenyl group at the 5-position.

Diflunisal: A salicylate derivative and anti-inflammatory analgesic with actions and side effects similar to those of ASPIRIN.
monohydroxybenzoic acid;
organofluorine compound
non-narcotic analgesic;
non-steroidal anti-inflammatory drug
suramin sodiumsuramin sodium : An organic sodium salt that is the hexasodium salt of suramin. It is an FDA approved drug for African sleeping sickness and river blindness.organic sodium saltangiogenesis inhibitor;
antinematodal drug;
antineoplastic agent;
apoptosis inhibitor;
EC 2.7.11.13 (protein kinase C) inhibitor;
GABA antagonist;
GABA-gated chloride channel antagonist;
purinergic receptor P2 antagonist;
ryanodine receptor agonist;
trypanocidal drug
glycyrrhizic acidglycyrrhizinic acid : A triterpenoid saponin that is the glucosiduronide derivative of 3beta-hydroxy-11-oxoolean-12-en-30-oic acid.enone;
glucosiduronic acid;
pentacyclic triterpenoid;
tricarboxylic acid;
triterpenoid saponin
EC 3.4.21.5 (thrombin) inhibitor;
plant metabolite
matrinealkaloid
daidzindaidzein 7-O-beta-D-glucoside : A glycosyloxyisoflavone that is daidzein attached to a beta-D-glucopyranosyl residue at position 7 via a glycosidic linkage. It is used in the treatment of alcohol dependency (antidipsotropic).

daidzin: a potent, selective, and reversible inhibitor of human mitochondrial aldehyde dehydrogenase
7-hydroxyisoflavones 7-O-beta-D-glucoside;
hydroxyisoflavone;
monosaccharide derivative
plant metabolite
methotrexatedicarboxylic acid;
monocarboxylic acid amide;
pteridines
abortifacient;
antimetabolite;
antineoplastic agent;
antirheumatic drug;
dermatologic drug;
DNA synthesis inhibitor;
EC 1.5.1.3 (dihydrofolate reductase) inhibitor;
immunosuppressive agent
ononin4'-methoxyisoflavones;
7-hydroxyisoflavones 7-O-beta-D-glucoside;
monosaccharide derivative
plant metabolite
tacrolimustacrolimus (anhydrous) : A macrolide lactam containing a 23-membered lactone ring, originally isolated from the fermentation broth of a Japanese soil sample that contained the bacteria Streptomyces tsukubaensis.

Tacrolimus: A macrolide isolated from the culture broth of a strain of Streptomyces tsukubaensis that has strong immunosuppressive activity in vivo and prevents the activation of T-lymphocytes in response to antigenic or mitogenic stimulation in vitro.
macrolide lactambacterial metabolite;
immunosuppressive agent
tamoxifenstilbenoid;
tertiary amino compound
angiogenesis inhibitor;
antineoplastic agent;
bone density conservation agent;
EC 1.2.3.1 (aldehyde oxidase) inhibitor;
EC 2.7.11.13 (protein kinase C) inhibitor;
estrogen antagonist;
estrogen receptor antagonist;
estrogen receptor modulator
formononetin4'-methoxyisoflavones;
7-hydroxyisoflavones
phytoestrogen;
plant metabolite
luteolin-7-glucosideluteolin 7-O-beta-D-glucoside : A glycosyloxyflavone that is luteolin substituted by a beta-D-glucopyranosyl moiety at position 7 via a glycosidic linkage.

luteolin-7-glucoside: has both antiasthmatic and antineoplastic activities; has 3C protease inhibitory activity; isolated from Ligustrum lucidum
beta-D-glucoside;
glycosyloxyflavone;
monosaccharide derivative;
trihydroxyflavone
antioxidant;
plant metabolite
cyclosporineramihyphin A: one of the metabolites produced by Fusarium sp. S-435; RN given refers to cpd with unknown MFhomodetic cyclic peptideanti-asthmatic drug;
anticoronaviral agent;
antifungal agent;
antirheumatic drug;
carcinogenic agent;
dermatologic drug;
EC 3.1.3.16 (phosphoprotein phosphatase) inhibitor;
geroprotector;
immunosuppressive agent;
metabolite
N(2)-carbamimidoyl-N-{2-[4-(3-{4-[(5-carboxyfuran-2-yl)methoxy]-2,3-dichlorophenyl}-1-methyl-1H-pyrazol-5-yl)piperidin-1-yl]-2-oxoethyl}-D-leucinamideN(2)-carbamimidoyl-N-{2-[4-(3-{4-[(5-carboxyfuran-2-yl)methoxy]-2,3-dichlorophenyl}-1-methyl-1H-pyrazol-5-yl)piperidin-1-yl]-2-oxoethyl}-D-leucinamide : A leucine derivative obtained by fpormal condensation of the secondary amino group of 5-({2,3-dichloro-4-[1-methyl-5-(piperidin-4-yl)-1H-pyrazol-3-yl]phenoxy}methyl)-2-furoic acid and the carboxy group of N-amidino-L-leucylglycineD-leucine derivative;
dichlorobenzene;
furoic acid;
glycine derivative;
guanidines;
pyrazolylpiperidine
calycosin-7-o-beta-d-glucopyranosidecalycosin-7-O-beta-D-glucoside : A glycosyloxyisoflavone that is calycosin substituted by a beta-D-glucopyranosyl residue at position at 7 via a glycosidic linkage.

calycosin-7-O-beta-D-glucoside: from Radix Astragali
4'-methoxyisoflavones;
7-hydroxyisoflavones 7-O-beta-D-glucoside;
hydroxyisoflavone;
monosaccharide derivative
nf 449
vilazodonevilazodone : A 1-benzofuran that is 5-(piperazin-1-yl}-1-benzofuran-2-carboxamide having a (5-cyanoindol-3-yl)butyl group attached at position N-4 on the piperazine ring. Used for the treatment of major depressive disorder.1-benzofurans;
indoles;
monocarboxylic acid amide;
N-alkylpiperazine;
N-arylpiperazine;
nitrile
antidepressant;
serotonergic agonist;
serotonin uptake inhibitor
gentamicin sulfate
diosgenin glucosidediosgenin 3-O-beta-D-glucoside : A sterol 3-beta-D-glucoside having diosgenin as the sterol component.

diosgenin glucoside: RN given refers to (3beta,25R)-isomer; structure given in first source
hexacyclic triterpenoid;
monosaccharide derivative;
spiroketal;
sterol 3-beta-D-glucoside
metabolite
fps-zm1FPS-ZM1: a neuroprotective agent and RAGE receptor antagonist; structure in first source
PF-06446846PF-06446846 : A triazolopyridine that is 3H-[1,2,3]triazolo[4,5-b]pyridine substituted by a 4-{(3-chloropyridin-2-yl)[(3R)-piperidin-3-yl]carbamoyl}phenyl group at position 3. It is a potent inhibitor of PCSK9.

PF-06446846: inhibits translation of PCSK9 ;structure in first source
benzamides;
monochloropyridine;
piperidines;
tertiary carboxamide;
triazolopyridine
antilipemic drug;
EC 3.4.21.61 (kexin) inhibitor
nbi 31772NBI 31772: an insulin-like growth factor-binding protein ligand; structure in first source

NBI-31772 : An isoquinoline substituted by 3,4-dihydroxybenzoyl, carboxy, hydroxy, and hydroxy groups at positions 1, 3, 6, and 7, respectively. It is a potent inhibitor of insulin-like growth factor-1 binding protein (IGFBP).
aromatic ketone;
benzenediols;
hydroxy monocarboxylic acid;
isoquinolines;
tetrol
insulin-like growth factor-binding protein inhibitor
n(delta)-(5-methyl-4-oxo-2-imidazolin-2-yl)ornithineN(delta)-(5-methyl-4-oxo-2-imidazolin-2-yl)ornithine: RN given for (L)-isomer; structure in first source