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  1. Article ; Online: Quantification of Trophoblast Syncytialization by Fluorescent Membrane Labeling.

    Zhang, Yang / Yang, Huanghe

    Methods in molecular biology (Clifton, N.J.)

    2023  Volume 2728, Page(s) 99–104

    Abstract: Trophoblast fusion or syncytialization is a fundamental yet poorly understood process during placental development. Primary cultured cytotrophoblasts and human choriocarcinoma cell lines are commonly used to study trophoblast fusion mechanisms in vitro. ... ...

    Abstract Trophoblast fusion or syncytialization is a fundamental yet poorly understood process during placental development. Primary cultured cytotrophoblasts and human choriocarcinoma cell lines are commonly used to study trophoblast fusion mechanisms in vitro. Quantification of trophoblast fusion index is a key for the in vitro studies. In this chapter, we describe a new method to quantify fusion index, which is based on fluorescent labeling of the plasma membrane using Di-8-ANEPPS, a membrane potential dye. This method directly works on live cells, thereby is simple, economic, and reliable.
    MeSH term(s) Pregnancy ; Humans ; Female ; Trophoblasts ; Placenta ; Membranes ; Cell Membrane ; Cell Line ; Coloring Agents
    Chemical Substances Coloring Agents
    Language English
    Publishing date 2023-11-01
    Publishing country United States
    Document type Journal Article
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-0716-3495-0_8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Structure-Function of TMEM16 Ion Channels and Lipid Scramblases.

    Le, Son C / Yang, Huanghe

    Advances in experimental medicine and biology

    2022  Volume 1349, Page(s) 87–109

    Abstract: The TMEM16 protein family comprises two novel classes of structurally conserved but functionally distinct membrane transporters that function as ... ...

    Abstract The TMEM16 protein family comprises two novel classes of structurally conserved but functionally distinct membrane transporters that function as Ca
    MeSH term(s) Anoctamins/genetics ; Anoctamins/metabolism ; Biological Transport ; Chloride Channels/metabolism ; Phospholipid Transfer Proteins/genetics ; Phospholipid Transfer Proteins/metabolism ; Phospholipids
    Chemical Substances Anoctamins ; Chloride Channels ; Phospholipid Transfer Proteins ; Phospholipids
    Language English
    Publishing date 2022-07-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 410187-X
    ISSN 0065-2598
    ISSN 0065-2598
    DOI 10.1007/978-981-16-4254-8_6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: TMEM16 and TMEM63/OSCA proteins share a conserved potential to permeate ions and phospholipids.

    Lowry, Augustus J / Liang, Pengfei / Wan, Y C Serena / Pei, Zhen-Ming / Yang, Huanghe / Zhang, Yang

    bioRxiv : the preprint server for biology

    2024  

    Abstract: The calcium-activated TMEM16 proteins and the mechanosensitive/osmolarity-activated OSCA/TMEM63 proteins belong to the Transmembrane Channel/Scramblase (TCS) superfamily. Within the superfamily, OSCA/TMEM63 proteins, as well as TMEM16A and TMEM16B, ... ...

    Abstract The calcium-activated TMEM16 proteins and the mechanosensitive/osmolarity-activated OSCA/TMEM63 proteins belong to the Transmembrane Channel/Scramblase (TCS) superfamily. Within the superfamily, OSCA/TMEM63 proteins, as well as TMEM16A and TMEM16B, likely function solely as ion channels. However, the remaining TMEM16 members, including TMEM16F, maintain an additional function as scramblases, rapidly exchanging phospholipids between leaflets of the membrane. Although recent studies have advanced our understanding of TCS structure-function relationships, the molecular determinants of TCS ion and lipid permeation remain unclear. Here we show that single lysine mutations in transmembrane helix (TM) 4 allow non-scrambling TCS members to permeate phospholipids. This study highlights the key role of TM 4 in controlling TCS ion and lipid permeation and offers novel insights into the evolution of the TCS superfamily, suggesting that, like TMEM16s, the OSCA/TMEM63 family maintains a conserved potential to permeate ions and phospholipids.
    Language English
    Publishing date 2024-02-05
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2024.02.04.578431
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Redox-dependent Cd

    Zhang, Guohui / Yang, Huanghe / Wang, Yuyin / Liang, Hongwu / Shi, Jingyi / Cui, Jianmin

    Biophysical journal

    2024  

    Abstract: Large-conductance ... ...

    Abstract Large-conductance Ca
    Language English
    Publishing date 2024-02-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 218078-9
    ISSN 1542-0086 ; 0006-3495
    ISSN (online) 1542-0086
    ISSN 0006-3495
    DOI 10.1016/j.bpj.2024.02.015
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Trophoblast organoids with physiological polarity model placental structure and function.

    Yang, Liheng / Liang, Pengfei / Yang, Huanghe / Coyne, Carolyn B

    bioRxiv : the preprint server for biology

    2023  

    Abstract: Human trophoblast organoids (TOs) are a three- ... ...

    Abstract Human trophoblast organoids (TOs) are a three-dimensional
    Language English
    Publishing date 2023-07-17
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.01.12.523752
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Trophoblast organoids with physiological polarity model placental structure and function.

    Yang, Liheng / Liang, Pengfei / Yang, Huanghe / Coyne, Carolyn B

    Journal of cell science

    2023  Volume 137, Issue 5

    Abstract: Human trophoblast organoids (TOs) are a three-dimensional ex vivo culture model that can be used to study various aspects of placental development, physiology and pathology. However, standard culturing of TOs does not recapitulate the cellular ... ...

    Abstract Human trophoblast organoids (TOs) are a three-dimensional ex vivo culture model that can be used to study various aspects of placental development, physiology and pathology. However, standard culturing of TOs does not recapitulate the cellular orientation of chorionic villi in vivo given that the multi-nucleated syncytiotrophoblast (STB) develops largely within the inner facing surfaces of these organoids (STBin). Here, we developed a method to culture TOs under conditions that recapitulate the cellular orientation of chorionic villi in vivo. We show that culturing STBin TOs in suspension with gentle agitation leads to the development of TOs containing the STB on the outer surface (STBout). Using membrane capacitance measurements, we determined that the outermost surface of STBout organoids contain large syncytia comprising >50 nuclei, whereas STBin organoids contain small syncytia (<10 nuclei) and mononuclear cells. The growth of TOs under conditions that mimic the cellular orientation of chorionic villi in vivo thus allows for the study of a variety of aspects of placental biology under physiological conditions.
    MeSH term(s) Female ; Pregnancy ; Humans ; Placenta ; Trophoblasts ; Organoids ; Cell Nucleus ; Giant Cells
    Language English
    Publishing date 2023-09-07
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2993-2
    ISSN 1477-9137 ; 0021-9533
    ISSN (online) 1477-9137
    ISSN 0021-9533
    DOI 10.1242/jcs.261528
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: An Additional Ca

    Le, Son C / Yang, Huanghe

    Cell reports

    2020  Volume 33, Issue 13, Page(s) 108570

    Abstract: ... Calcium ( ... ...

    Abstract Calcium (Ca
    MeSH term(s) Anoctamin-1/chemistry ; Anoctamin-1/physiology ; Binding Sites ; Cadmium/metabolism ; Calcium/metabolism ; Cell Membrane/metabolism ; Chloride Channels/physiology ; Electrophysiology/methods ; HEK293 Cells ; Humans ; Ion Channel Gating ; Ion Transport ; Models, Molecular ; Mutation ; Phospholipid Transfer Proteins/physiology ; Protein Conformation ; Protein Domains
    Chemical Substances Anoctamin-1 ; Chloride Channels ; Phospholipid Transfer Proteins ; Cadmium (00BH33GNGH) ; Calcium (SY7Q814VUP)
    Language English
    Publishing date 2020-12-30
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2649101-1
    ISSN 2211-1247 ; 2211-1247
    ISSN (online) 2211-1247
    ISSN 2211-1247
    DOI 10.1016/j.celrep.2020.108570
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Molecular underpinning of intracellular pH regulation on TMEM16F.

    Liang, Pengfei / Yang, Huanghe

    The Journal of general physiology

    2020  Volume 153, Issue 2

    Abstract: TMEM16F, a dual-function phospholipid scramblase and ion channel, is important in blood coagulation, skeleton development, HIV infection, and cell fusion. Despite advances in understanding its structure and activation mechanism, how TMEM16F is regulated ... ...

    Abstract TMEM16F, a dual-function phospholipid scramblase and ion channel, is important in blood coagulation, skeleton development, HIV infection, and cell fusion. Despite advances in understanding its structure and activation mechanism, how TMEM16F is regulated by intracellular factors remains largely elusive. Here we report that TMEM16F lipid scrambling and ion channel activities are strongly influenced by intracellular pH (pHi). We found that low pHi attenuates, whereas high pHi potentiates, TMEM16F channel and scramblase activation under physiological concentrations of intracellular Ca2+ ([Ca2+]i). We further demonstrate that TMEM16F pHi sensitivity depends on [Ca2+]i and exhibits a bell-shaped relationship with [Ca2+]i: TMEM16F channel activation becomes increasingly pHi sensitive from resting [Ca2+]i to micromolar [Ca2+]i, but when [Ca2+]i increases beyond 15 µM, pHi sensitivity gradually diminishes. The mutation of a Ca2+-binding residue that markedly reduces TMEM16F Ca2+ sensitivity (E667Q) maintains the bell-shaped relationship between pHi sensitivity and Ca2+ but causes a dramatic shift of the peak [Ca2+]i from 15 µM to 3 mM. Our biophysical characterizations thus pinpoint that the pHi regulatory effects on TMEM16F stem from the competition between Ca2+ and protons for the primary Ca2+-binding residues in the pore. Within the physiological [Ca2+]i range, the protonation state of the primary Ca2+-binding sites influences Ca2+ binding and regulates TMEM16F activation. Our findings thus uncover a regulatory mechanism of TMEM16F by pHi and shine light on our understanding of the pathophysiological roles of TMEM16F in diseases with dysregulated pHi, including cancer.
    MeSH term(s) Anoctamins/genetics ; Anoctamins/metabolism ; Calcium/metabolism ; HIV Infections ; Humans ; Hydrogen-Ion Concentration ; Ion Transport ; Phospholipid Transfer Proteins/genetics ; Phospholipid Transfer Proteins/metabolism
    Chemical Substances ANO6 protein, human ; Anoctamins ; Phospholipid Transfer Proteins ; Calcium (SY7Q814VUP)
    Language English
    Publishing date 2020-12-21
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 3118-5
    ISSN 1540-7748 ; 0022-1295
    ISSN (online) 1540-7748
    ISSN 0022-1295
    DOI 10.1085/jgp.202012704
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Endothelial TMEM16F lipid scramblase regulates angiogenesis.

    Shan, Ke Zoe / Le, Trieu / Liang, Pengfei / Dong, Ping / Yang, Huanghe

    bioRxiv : the preprint server for biology

    2023  

    Abstract: Dynamic loss of lipid asymmetry through the activation of TMEM16 ... ...

    Abstract Dynamic loss of lipid asymmetry through the activation of TMEM16 Ca
    Language English
    Publishing date 2023-08-20
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.08.17.553724
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Niclosamide potentiates TMEM16A and induces vasoconstriction.

    Liang, Pengfei / Wan, Yui Chun S / Yu, Kuai / Hartzell, H Criss / Yang, Huanghe

    bioRxiv : the preprint server for biology

    2023  

    Abstract: The TMEM16A calcium-activated chloride channel is a promising therapeutic target for various diseases. Niclosamide, an anthelmintic medication, has been considered as a TMEM16A inhibitor for treating asthma and chronic obstructive pulmonary disease, but ... ...

    Abstract The TMEM16A calcium-activated chloride channel is a promising therapeutic target for various diseases. Niclosamide, an anthelmintic medication, has been considered as a TMEM16A inhibitor for treating asthma and chronic obstructive pulmonary disease, but was recently found to possess broad-spectrum off-target effects. Here we show that, under physiological conditions, niclosamide acutely potentiates TMEM16A without having any inhibitory effect. Our computational and functional characterizations pinpoint a putative niclosamide binding site on the extracellular side of TMEM16A. Mutations in this site attenuate the potentiation. Moreover, niclosamide potentiates endogenous TMEM16A in vascular smooth muscle cells, triggers intracellular calcium increase, and constricts the murine mesenteric artery. Our findings advise caution when considering niclosamide as a TMEM16A inhibitor to treat diseases such as asthma, COPD, and hypertension. The identification of the putative niclosamide binding site provides insights into the mechanism of TMEM16A pharmacological modulation, shining light on developing specific TMEM16A modulators to treat human diseases.
    Language English
    Publishing date 2023-08-02
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.07.31.551400
    Database MEDical Literature Analysis and Retrieval System OnLINE

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