Sistemi di camere di Ussing

Sistemi completi di camere di Ussing per cellule e tessuti

Sistemi di camere di Ussing

Una camera di Ussing viene utilizzata per studiare il trasporto di soluti attraverso uno strato confluente di cellule. Questo strato è in genere un monostrato di cellule epiteliali che formano una barriera tra gli ambienti esterni e interni del corpo, come quelli che rivestono le vie aeree, il tratto intestinale e la vescica, ma potrebbe anche essere una struttura multistrato come la pelle o una coltura cellulare 3D o uno strato confluente di cellule endoteliali come la barriera ematoencefalica in coltura o l'endotelio corneale. Il trasporto di soluti può essere determinato misurando il flusso del soluto o talvolta, nel caso di soluti carichi come gli ioni, misurando la corrente attraverso il tessuto. Questi parametri elettrici, insieme alla resistenza tissutale, servono a valutare il trasporto di ioni e l'integrità tissutale.


Per realizzare queste misurazioni, i sistemi Ussing sono stati progettati in modo da avere tre componenti principali: la camera di Ussing, la pinza tensione/corrente e il sistema di acquisizione dati.

1) La camera di Ussing è semplicemente un dispositivo che consente di posizionare il tessuto tra due compartimenti pieni di soluzione. La camera può essere dotata di elettrodi per misurare la tensione e far passare la corrente attraverso il tessuto.

2) La pinza amperometrica viene utilizzata per controllare la tensione o la corrente attraverso l'epitelio e quindi determinare parametri bioelettrici quali la tensione transepiteliale, la corrente di cortocircuito e la resistenza o conduttanza.

3) I risultati delle misurazioni elettriche possono essere registrati utilizzando qualcosa di semplice come un registratore grafico o le versioni elettroniche più recenti di un registratore grafico. In alternativa, possono essere raccolti da un sistema di acquisizione dati intelligente che funge da registratore grafico ma misura e traccia anche la resistenza o la conduttanza dei tessuti in tempo reale, come Acquire & Analyze.

Sistemi Ussing completi che comprendono il nostro sistema EasyMount Ussing Chamber, strumenti multicanale a pinza di tensione e corrente e il pacchetto di acquisizione dati Acquire & Analyze insieme ad accessori per stabilire un sistema quasi completo e funzionante. Questi sistemi sono disponibili in versioni a 2, 4, 6 e 8 canali in base a una delle tre diverse camere Ussing.

Sistema Ussing EasyMount

Ussing Chamber Systems

Our integrated Ussing chamber system platforms combine precision EasyMount chambers, multi-channel voltage/current clamps, and real-time data acquisition for high-fidelity Vte, Isc, Rte, and Gte measurements across cultured cells and tissues. Compare systems below; full included components are shown in the cards that follow.

System Comparison

System Primary Use Chamber Model Working Volume (per half) Tissue / Holders Channels Options Links
EM8-C
Cell & Tissue
General epithelial transport & barrier studies with flexible sample formats. P2300 EasyMount 2–7 mL (typ. 5 mL) Interchangeable P23xx sliders for cell inserts and a range of animal/human tissues. 2 / 4 / 6 / 8 Base, CE, High Voltage (±35 V), CE + HV Includes
Product
EM8-LV
Low Volume
Low net transport or assays requiring higher solute concentrations. P2400 EasyMount (low volume) 1.0–5.0 mL Choice of holders; supports biopsies (intestinal/nasal), mouse pup intestine, cornea; up to 0.71 cm² (Ø 9.5 mm). 2 / 4 / 6 / 8 Base, CE, High Voltage (±35 V), CE + HV Includes
Product
EM8-R
Rat Tissue
Specialized for rat intestinal tissue mounting and analysis. P2250 EasyMount (rat) 2.0–7.0 mL (typ. 5 mL) P2252 slider with curved pins; 5 × 22 mm oblong aperture → 1.0 cm² tissue area. 2 / 4 / 6 / 8 Base, CE, High Voltage (±35 V), CE + HV Includes
Product
Notes & Best Practices:
  • Pair each Ussing chamber system with Ag/AgCl electrodes; validate Isc/Rte scaling in Acquire & Analyze before runs.
  • Match holder/aperture to tissue geometry; for low-volume assays, confirm target bath concentrations.
  • Use gas lift (air/95–5) for mixing/oxygenation; keep water-bath regulation stable across channels.

Included Components (by System)

EM8-C — Included Components

  • VCC MC8-8S voltage/current clamp with OptiGain
  • DM-MC6 Input Modules with Dummy Membrane (×8)
  • Acquire and Analyze Data Acquisition package with DI-720P
  • EM-CSYS-8 Chamber System
  • P2300 Ussing Chambers (×8) & P2300 Chamber Caps (×8)
  • P2020-S Electrode Sets (×8) & P2024-40 Electrode Lead Sets (×8)
  • P2060 Air Valve Sets (×8)
  • FN15 Filling Needles (×16)
  • GWB1 Gas Washing Bottle (1 L)
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EM8-LV — Included Components

  • VCC MC8-8S voltage/current clamp with OptiGain
  • DM-MC6 Input Modules (×8)
  • Acquire & Analyze Data Acquisition package with DI-720P
  • P2400 Low-Volume Ussing Chambers (×8) & caps (×8)
  • P2020-S Electrode Sets (×8) & P2024-40 Electrode Lead Sets (×8)
  • P2060 Air Valve Sets (×8)
  • FN15 Filling Needles (×16)
  • GWB1 Gas Washing Bottle (1 L)
  • P2400 series sliders are purchased separately; choose holder per chamber.
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EM8-R — Included Components

  • VCC MC8-8S voltage/current clamp with OptiGain
  • DM-MC6 Input Modules (×8)
  • Acquire & Analyze Data Acquisition package with DI-720P
  • P2250 Rat Tissue Ussing Chambers (×8) & caps (×8)
  • P2020-S Electrode Sets (×8) & P2024-40 Electrode Lead Sets (×8)
  • P2060 Air Valve Sets (×8)
  • FN15 Filling Needles (×16)
  • GWB1 Gas Washing Bottle (1 L)
  • P2252 sliders (curved pins, 5×22 mm, 1.0 cm² tissue area) — recommend ordering extra
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Why Labs Choose Our Ussing Chamber Systems

Precision & Reproducibility

EasyMount mechanics and OptiGain clamp performance deliver stable Vte/Isc baselines, fast settling, and repeatable Rte/Gte calculations.

Throughput Without Compromise

2–8 channel configurations support simultaneous studies while maintaining uniform temperature control, gas lift mixing, and electrode performance.

Modular & Application-Ready

Swap sliders/holders to match tissue geometry and study design—from cell inserts to low-volume biopsies to dedicated rat tissue prep.

EasyMount Ussing Chamber Systems Features

  • EasyMount, leak-free setup: chamber slides into the heated stand; arms and a thumb screw secure it without damaging tissue edges.
  • Low reagent use when needed: P2400 low-volume option minimizes mL per half-chamber for expensive compounds.
  • Insert & tissue compatibility: supports Snapwell/Transwell/Millicell inserts and native tissues.
  • Throughput that scales: 2, 4, 6, or 8 channels with VCC MC2/MC6/MC8 for parallel experiments.
  • Training & support: protocols, calibration guidance, and application help.

Key Measurements and Applications

Measurements: TER/TEER (barrier integrity), Isc (active transport at ~0 mV), I–V curves, and solute flux/permeability (radiolabeled/fluorescent tracers).

Applications: GI, airway, renal, and skin epithelia; CFTR/ENaC studies; drug permeability and transporter function; inflammation and tight-junction research.

Resources & Support

Chamber Sliders — choose apertures/holders for each Ussing chamber system.

Voltage/Current Clamps — multi-channel control for Vte, Isc, and Rte protocols.

Acquire & Analyze — real-time Rte/Gte, stimulus protocols, and export.

Electrodes & Accessories — Ag/AgCl electrodes, leads, air valves, gas wash bottles.

Talk to an applications specialist — get help matching a system to your assay.

Frequently Asked Questions

Which Ussing chamber system should I choose?

EM8-C for versatile cell/tissue work, EM8-LV for low-volume or high-concentration assays, and EM8-R for rat intestinal tissue workflows.

Can I measure tissue resistance in real time?

Yes. With Acquire & Analyze, Rte and Gte are computed and plotted live alongside Vte and Isc.

Do I need different sliders/holders for different tissues?

Yes. Select sliders that match your tissue geometry and aperture target. For P2400 systems, sliders are purchased separately per chamber.

What channel count do I need?

2–4 channels suit smaller labs and method development; 6–8 channels support higher throughput and parallel comparisons.