General Information:

Id: 3,680
Mus musculus
C57BL/6 (B6-Ly5.2)/(B6-Ly5.1); Mx-1-Cre, 2 month-old; Tgfbr2flox/-Rag2-/- mice
Reference: Yamazaki S et al.(2011) Nonmyelinating Schwann cells maintain hematopoietic stem cell hibernation in the bone marrow niche Cell 147: 1146-1158 [PMID: 22118468]

Interaction Information:

Comment TGF-beta binds to its receptor composed of Tgf-betaRII and TGF-betaRI. [Method: cited information]
Formal Description
Interaction-ID: 35281

gene/protein

Tgfbr1

interacts (colocalizes) with

gene/protein

Tgfbr2

thereby forming an active Tgf-beta receptor
Drugbank entries Show/Hide entries for Tgfbr1 or Tgfbr2
Comment TGF-beta binds to its receptor composed of Tgf-betaRII and TGF-betaRI. [Method: cited information]
Formal Description
Interaction-ID: 35282

complex/PPI

Tgf-beta receptor

increases_activity of

Comment TGF-beta binds to its receptor composed of Tgf-betaRII and TGF-betaRI. [Method: cited information]
Formal Description
Interaction-ID: 35283

gene/protein

Tgfbr1

is_part_of

complex/PPI

Tgf-beta receptor

Drugbank entries Show/Hide entries for Tgfbr1
Comment TGF-beta binds to its receptor composed of Tgf-betaRII and TGF-betaRI. [Method: cited information]
Formal Description
Interaction-ID: 35284

gene/protein

Tgfbr2

is_part_of

complex/PPI

Tgf-beta receptor

Drugbank entries Show/Hide entries for Tgfbr2
Comment Activated Tgf-beta receptor RI/RII phosphorylates Smad2 and 3. In HSC (CD150+CD48-CD41-Lin-) Smad2 and 3 are phosphorylated. [Method: BM section, FACS, fluorescence photomicrographs]
Formal Description
Interaction-ID: 35285

complex/PPI

Tgf-beta receptor

increases_phosphorylation of

gene/protein

Smad2

in HSC (CD150+CD48-CD41-Lin-)
Drugbank entries Show/Hide entries for Smad2
Comment Activated Tgf-beta receptor RI/RII phosphorylates Smad2 and 3. In HSC (CD150+CD48-CD41-Lin-) Smad2 and 3 are phosphorylated. [Method: BM section, FACS, fluorescence photomicrographs]
Formal Description
Interaction-ID: 35286

complex/PPI

Tgf-beta receptor

increases_phosphorylation of

gene/protein

Smad3

in HSC (CD150+CD48-CD41-Lin-)
Comment Tgfbr2-deficient HSCs were associated with reduced p-Smad2/3, increased cycling, and reduced long-term repopulating activity in HSCs. These results demonstrated for the first time that TGF-beta/Smad signaling is active in BM HSCs and maintains their dormancy. [Method: Tgfbr2-deficient mice, BM section, FACS, fluorescence photomicrographs]
Formal Description
Interaction-ID: 35287

gene/protein

Tgfbr2

increases_activity of

in HSC (CD34-KSL) in vivo
Drugbank entries Show/Hide entries for Tgfbr2
Comment Loss of Tgfbr2 was associated with reduced p-Smad2/3, increased cycling, and reduced long-term repopulating activity in HSCs. These results demonstrated for the first time that TGF-beta/Smad signaling is active in BM HSCs and maintains their dormancy. [Method: cell cycle analysis in Tgfbr2-deficient HSCs (CD34-KSL)]
Formal Description
Interaction-ID: 35288

gene/protein

Tgfbr2

decreases_activity of

process

cell cycle

in HSC (CD34-KSL) in vivo
Drugbank entries Show/Hide entries for Tgfbr2
Comment Loss of Tgfbr2 was associated with reduced p-Smad2/3, increased cycling, and reduced long-term repopulating activity in HSCs. These results demonstrated for the first time that TGF-beta/Smad signaling is active in BM HSCs and maintains their dormancy. [Method: cell cycle analysis in Tgfbr2-deficient HSCs (CD34-KSL)]
Formal Description
Interaction-ID: 35289

gene/protein

Tgfbr2

increases_activity of

process

quiescence

in HSC (CD34-KSL) in vivo
Drugbank entries Show/Hide entries for Tgfbr2
Comment Loss of Tgfbr2 was associated with reduced p-Smad2/3, increased cycling, and reduced long-term repopulating activity in HSCs. These results demonstrated for the first time that TGF-beta/Smad signaling is active in BM HSCs and maintains their dormancy. [Method: competitive repopulation assay, BM cells from Tgfbr2del/-Rag2-/- mice transplanted transplanted into B6-Ly5.2 mice, PB analysis after 16 weeks]
Formal Description
Interaction-ID: 35290

gene/protein

Tgfbr2

increases_activity of

process

repopulation >16 weeks

in HSC (CD34-KSL) in vivo
Drugbank entries Show/Hide entries for Tgfbr2
Comment GFAP-positive glial cells (Schwann cells) express integrin-b8 in BM. [Method: glial cells, qRT-PCR]
Formal Description
Interaction-ID: 35291

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_expression of

gene/protein

Itgb8

Comment Itgb8 activates Tgfbeta receptor, most likely by facilitating proteolytic degradation of LAP, which keeps the receptor in an inactive state, by matrix metalloproteinases. [Method: cited information]
Formal Description
Interaction-ID: 35292

gene/protein

Itgb8

increases_activity of

complex/PPI

Tgf-beta receptor

Comment All GFAP-positive cells were positive for nestin and were positive for active Tgf-beta. [Method: immunohistochemistry]
Formal Description
Interaction-ID: 35293

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_quantity of

gene/protein

Nes

Comment All GFAP-positive cells were positive for nestin and were positive for active Tgf-beta. [Method: immunohistochemistry]
Formal Description
Interaction-ID: 35294

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_activity of

gene/protein

Tgfbr2

Drugbank entries Show/Hide entries for Tgfbr2
Comment Itgb8 activates Tgfbeta receptor, most likely by facilitating proteolytic degradation of LAP, which keeps the receptor in an inactive state, by matrix metalloproteinases. [Method: cited information]
Formal Description
Interaction-ID: 35295

gene/protein

Itgb8

increases_activity of

Comment Loss of Tgfbr2 was associated with reduced p-Smad2/3, increased cycling, and reduced long-term repopulating activity in HSCs. These results demonstrated for the first time that TGF-beta/Smad signaling is active in BM HSCs and maintains their dormancy. [Method: BM section, FACS, fluorescence photomicrographs]
Formal Description
Interaction-ID: 35296

increases_activity of

in HSC (CD34-KSL) in vivo
Comment GFAP-expressing glial cells were in direct contact with about 23% of CD150+CD48-CD41-Lin- HSCs, whereas about 13% and 30% of HSCs were in contact, respectively, with osteocalcin-expressing osteoblastic cells and VE-cadherin expressing vascular cells. [Method: fluorescence micrographs]
Formal Description
Interaction-ID: 35297

tissue/cell line

non-myelinated Schwann cell (GFAP+)

interacts (colocalizes) with

Immunophenotype

HSC (CD150+CD48-CD41-Lin-)

about 23% of the HSCs were in contact with the Schwann cells in vivo
Comment GFAP-expressing glial cells were in direct contact with about 23% of CD150+CD48-CD41-Lin- HSCs, whereas about 13% and 30% of HSCs were in contact, respectively, with osteocalcin-expressing osteoblastic cells and VE-cadherin expressing vascular cells. [Method: fluorescence micrographs]
Formal Description
Interaction-ID: 35298

tissue/cell line

osteoblast (osteocalcin+)

interacts (colocalizes) with

Immunophenotype

HSC (CD150+CD48-CD41-Lin-)

about 13% of the HSCs were in contact with osteocalcin-expressing osteoblasts in vivo
Comment GFAP-expressing glial cells were in direct contact with about 23% of CD150+CD48-CD41-Lin- HSCs, whereas about 13% and 30% of HSCs were in contact, respectively, with osteocalcin-expressing osteoblastic cells and VE-cadherin expressing vascular cells. [Method: fluorescence micrographs]
Formal Description
Interaction-ID: 35299

tissue/cell line

sinusoidal endothelium (VE-cadherin+)

interacts (colocalizes) with

Immunophenotype

HSC (CD150+CD48-CD41-Lin-)

about 30% of the HSCs were in contact with VE-cadherin-expressing vascular cells in vivo
Comment Schwann cells prepared from sciatic nerves expressed Tgfb1, Tgfb2, and Tgfb3 as well as Itgb8. Surprisingly, they also expressed major HSC niche factor genes, including Cxcl12, c-kit ligand (kitl), anginpoitin-1 (Angpt1), and Tpo. [Method: GFAP-positive primary glial cells were prepared from the sciatic nerve of adult C57BL/6 GFAP-GFP mice, qRT-PCR]
Formal Description
Interaction-ID: 35300

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_expression of

gene/protein

Tgfb1

Drugbank entries Show/Hide entries for Tgfb1
Comment Schwann cells prepared from sciatic nerves expressed Tgfb1, Tgfb2, and Tgfb3 as well as Itgb8. Surprisingly, they also expressed major HSC niche factor genes, including Cxcl12, c-kit ligand (kitl), anginpoitin-1 (Angpt1), and Tpo. [Method: GFAP-positive primary glial cells were prepared from the sciatic nerve of adult C57BL/6 GFAP-GFP mice, qRT-PCR]
Formal Description
Interaction-ID: 35301

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_expression of

gene/protein

Tgfb2

Comment Schwann cells prepared from sciatic nerves expressed Tgfb1, Tgfb2, and Tgfb3 as well as Itgb8. Surprisingly, they also expressed major HSC niche factor genes, including Cxcl12, c-kit ligand (kitl), anginpoitin-1 (Angpt1), and Tpo. [Method: GFAP-positive primary glial cells were prepared from the sciatic nerve of adult C57BL/6 GFAP-GFP mice, qRT-PCR]
Formal Description
Interaction-ID: 35302

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_expression of

gene/protein

Tgfb3

Drugbank entries Show/Hide entries for Tgfb3
Comment Schwann cells prepared from sciatic nerves expressed Tgfb1, Tgfb2, and Tgfb3 as well as Itgb8. Surprisingly, they also expressed major HSC niche factor genes, including Cxcl12, c-kit ligand (kitl), anginpoitin-1 (Angpt1), and Tpo. [Method: GFAP-positive primary glial cells were prepared from the sciatic nerve of adult C57BL/6 GFAP-GFP mice, qRT-PCR]
Formal Description
Interaction-ID: 35303

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_expression of

gene/protein

Itgb8

Comment Schwann cells prepared from sciatic nerves expressed Tgfb1, Tgfb2, and Tgfb3 as well as Itgb8. Surprisingly, they also expressed major HSC niche factor genes, including Cxcl12, c-kit ligand (kitl), anginpoitin-1 (Angpt1), and Tpo. [Method: GFAP-positive primary glial cells were prepared from the sciatic nerve of adult C57BL/6 GFAP-GFP mice, qRT-PCR]
Formal Description
Interaction-ID: 35304

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_expression of

gene/protein

Cxcl12

Drugbank entries Show/Hide entries for Cxcl12
Comment Schwann cells prepared from sciatic nerves expressed Tgfb1, Tgfb2, and Tgfb3 as well as Itgb8. Surprisingly, they also expressed major HSC niche factor genes, including Cxcl12, c-kit ligand (kitl), anginpoitin-1 (Angpt1), and Tpo. [Method: GFAP-positive primary glial cells were prepared from the sciatic nerve of adult C57BL/6 GFAP-GFP mice, qRT-PCR]
Formal Description
Interaction-ID: 35305

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_expression of

gene/protein

Kitl

Comment Schwann cells prepared from sciatic nerves expressed Tgfb1, Tgfb2, and Tgfb3 as well as Itgb8. Surprisingly, they also expressed major HSC niche factor genes, including Cxcl12, c-kit ligand (kitl), anginpoitin-1 (Angpt1), and Tpo. [Method: GFAP-positive primary glial cells were prepared from the sciatic nerve of adult C57BL/6 GFAP-GFP mice, qRT-PCR]
Formal Description
Interaction-ID: 35306

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_expression of

gene/protein

Angpt1

Comment Schwann cells prepared from sciatic nerves expressed Tgfb1, Tgfb2, and Tgfb3 as well as Itgb8. Surprisingly, they also expressed major HSC niche factor genes, including Cxcl12, c-kit ligand (kitl), anginpoitin-1 (Angpt1), and Tpo. [Method: GFAP-positive primary glial cells were prepared from the sciatic nerve of adult C57BL/6 GFAP-GFP mice, qRT-PCR]
Formal Description
Interaction-ID: 35307

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_expression of

gene/protein

Thpo

Comment Loss of GFAP-positive cells results in loss of HSC (CD34-KSL). [Method: Glial cells deleted via Wallerian degeneration, frequency of CD34-KSL cells]
Formal Description
Interaction-ID: 35308

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_quantity of

Immunophenotype

HSC (CD34-KSL)

in BM in vivo
Comment Glial cells are responsible for the maintenance of HSC hibernation in BM by regulating the process by which latent TGF-beta is activated. [Method: CD34-KSL cells after denervation of sympathetic nerves, BrdU-labeling]
Formal Description
Interaction-ID: 35309

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_activity of

process

quiescence

of HSC (CD34-KSL) in vivo
Comment Glial cells are responsible for the maintenance of HSC hibernation in BM by regulating the process by which latent TGF-beta is activated. [Method: CD34-KSL cells after denervation of sympathetic nerves, BrdU-labeling]
Formal Description
Interaction-ID: 35310

tissue/cell line

non-myelinated Schwann cell (GFAP+)

decreases_activity of

process

cell cycle

in vivo
Comment Activated Tgf-beta receptor RI/RII phosphorylates Smad2 and 3. In HSC (CD150+CD48-CD41-Lin-) Smad2 and 3 are phosphorylated. [Method: BM section, FACS, fluorescence photomicrographs]
Formal Description
Interaction-ID: 35316

complex/PPI

Tgf-beta receptor

increases_activity of

in HSC (CD150+CD48-CD41-Lin-)
Comment All GFAP-positive cells were positive for nestin and were positive for active Tgf-beta. [Method: immunohistochemistry]
Formal Description
Interaction-ID: 35318

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_quantity of

gene/protein

Gfap

Comment Smad2 and 3 are players of the SMAD signaling pathway. [Method: cited information]
Formal Description
Interaction-ID: 35319

gene/protein

Smad2

increases_activity of

Drugbank entries Show/Hide entries for Smad2
Comment Smad2 and 3 are players of the SMAD signaling pathway. [Method: cited information]
Formal Description
Interaction-ID: 35320

gene/protein

Smad3

increases_activity of

Comment TGF-beta binds to its receptor composed of Tgf-betaRII and TGF-betaRI. [Method: cited information]
Formal Description
Interaction-ID: 35321

gene/protein

Tgfbr2

increases_activity of

Drugbank entries Show/Hide entries for Tgfbr2
Comment TGF-beta binds to its receptor composed of Tgf-betaRII and TGF-betaRI. [Method: cited information]
Formal Description
Interaction-ID: 36487

gene/protein

Tgfbr1

increases_activity of

Drugbank entries Show/Hide entries for Tgfbr1
Comment Itgb8 activates Tgfbeta receptor, most likely by facilitating proteolytic degradation of LAP, which keeps the receptor in an inactive state, by matrix metalloproteinases. [Method: immunohistochemistry]
Formal Description
Interaction-ID: 37313

tissue/cell line

non-myelinated Schwann cell (GFAP+)

increases_activity of

complex/PPI

Tgf-beta receptor

by expressing Itg8, the activator for latent TGF-beta