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Robinson LJ, Sudarshan D, Goold E, Comstock J, Klonoski J, Mao Q, Palmer CA, Davidson C. A novel, pathogenic COL4A1 missense variant involving thrombotic microangiopathic leukoencephalopathy in a neonate. J Neuropathol Exp Neurol 2023; 82:880-883. [PMID: 37475185 DOI: 10.1093/jnen/nlad057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023] Open
Affiliation(s)
| | - Duncan Sudarshan
- Pathology Department, University of Utah, Salt Lake City, Utah, USA
| | - Eric Goold
- Pathology Department, University of Utah, Salt Lake City, Utah, USA
| | - Jessica Comstock
- Pathology Department, University of Utah, Salt Lake City, Utah, USA
| | - Joshua Klonoski
- Pathology Department, University of Utah, Salt Lake City, Utah, USA
| | - Qinwen Mao
- Pathology Department, University of Utah, Salt Lake City, Utah, USA
| | - Cheryl A Palmer
- Pathology Department, University of Utah, Salt Lake City, Utah, USA
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Potter S, Sudarshan D, Lázár-Molnár E, Baker S, Metcalf RA, Lin L. Life threatening platelet transfusion refractoriness due to an anamnestic human leukocyte antigen alloantibody response. Transfusion 2022; 62:2161-2162. [PMID: 35912900 DOI: 10.1111/trf.17042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 06/08/2022] [Accepted: 06/26/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Scott Potter
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA.,ARUP Laboratories, Salt Lake City, Utah, USA
| | - Duncan Sudarshan
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA.,ARUP Laboratories, Salt Lake City, Utah, USA
| | | | - Steven Baker
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA.,ARUP Laboratories, Salt Lake City, Utah, USA
| | - Ryan A Metcalf
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA.,ARUP Laboratories, Salt Lake City, Utah, USA
| | - Leo Lin
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA.,ARUP Laboratories, Salt Lake City, Utah, USA
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Gonzalez A, Brown M, Hatlestad G, Akhavan N, Smith T, Hembd A, Moore J, Montes D, Mosley T, Resendez J, Nguyen H, Wilson L, Campbell A, Sudarshan D, Lloyd A. TTG2 controls the developmental regulation of seed coat tannins in Arabidopsis by regulating vacuolar transport steps in the proanthocyanidin pathway. Dev Biol 2016; 419:54-63. [PMID: 27046632 DOI: 10.1016/j.ydbio.2016.03.031] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 03/24/2016] [Accepted: 03/31/2016] [Indexed: 12/15/2022]
Abstract
The brown color of Arabidopsis seeds is caused by the deposition of proanthocyanidins (PAs or condensed tannins) in their inner testa layer. A transcription factor complex consisting of TT2, TT8 and TTG1 controls expression of PA biosynthetic genes, just as similar TTG1-dependent complexes have been shown to control flavonoid pigment pathway gene expression in general. However, PA synthesis is controlled by at least one other gene. TTG2 mutants lack the pigmentation found in wild-type seeds, but produce other flavonoid compounds, such as anthocyanins in the shoot, suggesting that TTG2 regulates genes in the PA biosynthetic branch of the flavonoid pathway. We analyzed the expression of PA biosynthetic genes within the developing seeds of ttg2-1 and wild-type plants for potential TTG2 regulatory targets. We found that expression of TT12, encoding a MATE type transporter, is dependent on TTG2 and that TTG2 can bind to the upstream regulatory region of TT12 suggesting that TTG2 directly regulates TT12. Ectopic expression of TT12 in ttg2-1 plants partially restores seed coat pigmentation. Moreover, we show that TTG2 regulation of TT12 is dependent on TTG1 and that TTG1 and TTG2 physically interact. The observation that TTG1 interacts with TTG2, a WRKY type transcription factor, proposes the existence of a novel TTG1-containing complex, and an addendum to the existing paradigm of flavonoid pathway regulation.
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Affiliation(s)
- Antonio Gonzalez
- Department of Molecular Biosciences and The Institute for Cellular and Molecular Biology, The University of Texas at Austin, 2500 Speedway, Austin, TX 78712, USA; The Freshman Research Initiative, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Matthew Brown
- Department of Molecular Biosciences and The Institute for Cellular and Molecular Biology, The University of Texas at Austin, 2500 Speedway, Austin, TX 78712, USA
| | - Greg Hatlestad
- Department of Molecular Biosciences and The Institute for Cellular and Molecular Biology, The University of Texas at Austin, 2500 Speedway, Austin, TX 78712, USA
| | - Neda Akhavan
- Department of Molecular Biosciences and The Institute for Cellular and Molecular Biology, The University of Texas at Austin, 2500 Speedway, Austin, TX 78712, USA
| | - Tyler Smith
- The Freshman Research Initiative, The University of Texas at Austin, Austin, TX 78712, USA
| | - Austin Hembd
- The Freshman Research Initiative, The University of Texas at Austin, Austin, TX 78712, USA
| | - Joshua Moore
- The Freshman Research Initiative, The University of Texas at Austin, Austin, TX 78712, USA
| | - David Montes
- The Freshman Research Initiative, The University of Texas at Austin, Austin, TX 78712, USA
| | - Trenell Mosley
- Department of Molecular Biosciences and The Institute for Cellular and Molecular Biology, The University of Texas at Austin, 2500 Speedway, Austin, TX 78712, USA; The Freshman Research Initiative, The University of Texas at Austin, Austin, TX 78712, USA
| | - Juan Resendez
- The Freshman Research Initiative, The University of Texas at Austin, Austin, TX 78712, USA
| | - Huy Nguyen
- The Freshman Research Initiative, The University of Texas at Austin, Austin, TX 78712, USA
| | - Lyndsey Wilson
- The Freshman Research Initiative, The University of Texas at Austin, Austin, TX 78712, USA
| | - Annabelle Campbell
- The Freshman Research Initiative, The University of Texas at Austin, Austin, TX 78712, USA
| | - Duncan Sudarshan
- The Freshman Research Initiative, The University of Texas at Austin, Austin, TX 78712, USA
| | - Alan Lloyd
- Department of Molecular Biosciences and The Institute for Cellular and Molecular Biology, The University of Texas at Austin, 2500 Speedway, Austin, TX 78712, USA
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