这项研究得到了国家卫生研究院、国家牙科和颅面研究研究所 (DE025030) 的资助。

下文所述的议定书得到了机构动物保育和使用委员会的批准, 并遵循了国家卫生研究院制定的道德准则。本报告所列的所有数据都是使用10-12 周龄的雌性小鼠产生的。使用的小鼠如下: C57BL/6, balb/c, DBA1, 129S, 和 (B6XA/J) F1。所有小鼠都被安置在屏障笼 (每笼5只动物) 的特定无病原体条件, 并提供饲料和水 ad 随意。
1. 准备
<ol><li>要准备一份盐酸匹罗卡品的溶液, 重10毫克的化合物, 并将其溶于1.776 毫升的无菌等渗盐水中, 由涡流, 给出一个5.63 毫克/毫升的股票溶液。没有必要对此解决方案进行消毒。但如果需要, 通过0.2 µM 过滤器过滤。将此库存解决方案存储在-80 oC 冰箱中的多个等分中, 可长达3月。每一个冷冻库存是一次性使用。一旦解冻, 不要冻结的匹罗卡品溶液。</li>
	<li>采取0.6 毫升离心管, 并小心地打在每个管底部的一个小孔与一个加热的18口径针。将这些管子设置成2毫升的管子。管子不必是无菌的。</li>
	<li>使用锋利的无菌刀片, 将圆柱形吸水棉签切成2厘米长的碎片。斜切每2厘米的一块, 给2圆锥状的棉签。在0.6 毫升离心管中每一个都放一个棉签。</li>
	<li>称0.6 毫升离心管含有干拭子。</li>
	<li>把老鼠转移到一个新的干净的笼子里, 用水瓶来研究。在开始收集唾液之前, 将没有食物的小鼠保持至少2小时, 以防止食物颗粒污染所收集的唾液。 注意: 此过程不需要保持每笼1鼠标。然而, 在每个笼子里放置的老鼠数量取决于具体机构的动物使用规则和规定。</li>
	<li>在2小时结束前, 准备工作的匹罗卡品解决方案 (0.0563 毫克/毫升), 稀释的库存溶液100x 在无菌盐水。这是没有必要进一步过滤消毒这个解决方案。在冰上始终保持工作的匹罗卡品解决方案。 注:表 1给出了用于一系列鼠标体重的匹罗卡品的数量, 以给出0.375 毫克/千克体重的最终剂量。</li>
</ol>2. 程序
<ol><li>使用表 1对每个鼠标进行权衡, 并确定每个鼠标的麻醉组合剂量。将第一只老鼠注射到腹腔内的麻醉药的适当容积。设置2分钟的定时器 (在这个协议中测试的大多数小鼠菌株去睡觉2分钟)。当放置在平坦的表面上时, 确保鼠标被正确地麻醉。如果鼠标仍在行走, 请等待额外的2分钟, 然后再继续下一步。应用一滴润滑油眼膏, 以防止干燥。 注: 在表 1中, 麻醉剂混合物的剂量是0.007 毫升/克体重。这个过程的最佳范围是0.006 到0.008 毫升/克体重。然而, 4 分钟后, 如果鼠标仍然行走或表现出生涩的运动, 请咨询机构兽医适当增加麻醉剂量。</li>
	<li>使用表 1确定用于鼠标的匹罗卡品的剂量, 并通过腹腔内路由注入适当的量。将定时器设置为2分钟, 并将鼠标插入50毫升抑制剂管, 直到头部和耳朵伸出切口为止。将管子置于45度角, 头部向下, 腹面朝上。把管子贴到手术板上, 防止它移动。 注:表 1为小鼠提供了17克以上的剂量, 因为这一过程没有尝试对体重低于17克的小鼠。</li>
	<li>在2分钟结束时, 轻轻地将一双闭合的显微解剖钳插入口中, 并将下颚向上提起以打开嘴巴。把镊子1-2 毫米进一步推入口中, 确保舌头被看见放在钳子的顶臂上。用另一对精致的镊子, 按住前称的干拭子接近其锥形尖端。</li>
	<li>轻轻地将拭子的锥形尖端滑入口中。取出镊子, 在口腔中留下棉签的尖端。</li>
	<li>抓住更宽的棉签的一端延伸到嘴的外面, 旋转它以允许与嘴巴接触的最大面积。保持棉签在这个位置15分钟。 注意: 这可确保拭子在收集期间保持在口中。请注意, 棉签的锥形尖端起到灯芯的作用, 拭子的较宽部分仍留在口腔外。</li>
	<li>在15分钟结束时, 轻轻旋转拭子以收集未被吸收的唾液, 并将湿拭子放入0.6 毫升离心管中。关闭管, 并设置在2毫升管放在冰。 注: 此时, 口腔黏膜会出现完全干燥。现在, 老鼠可以被移回笼子里, 从麻醉中恢复过来。</li>
	<li>将鼠标移到笼子里。在唾液收集后将湿润的食物颗粒放在笼子里, 以帮助更快的补液。 注意: 小鼠在收集结束后10分钟内醒来。皮下注射0.2 毫升预热等渗盐水也可给予加速恢复。</li>
	<li>继续下一只鼠标。所有的小鼠都应该被监测, 直到它们完全恢复并处于流动状态。</li>
</ol>3. 测量
<ol><li>在所有的收集结束, 重量0.6 毫升管与湿拭子。计算湿重和干重之间的差异以获得唾液的重量。将0.6 毫升管与唾液放回2毫升管。</li>
	<li>切断2毫升管子的盖子然后, 离心2毫升管2分钟在 7500 x g, 在4oC 在一个微型离心机, 以恢复唾液。测量用微获得的唾液体积。</li>
	<li>表达的结果为唾液重量 (mg)10超过15分钟或作为唾液重量 (mg)/小鼠体重 (g) 的比率。 注: 如果从拭子中提取出的唾液量被测量出来, 则表明唾液体积 (毫升) 或唾液体积 (毫升)/小鼠体重 (g) 的比值。</li>
</ol>

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作者没有利益冲突透露。

唾液生产是一个复杂的过程, 受多种因素的影响。因此, 测定实验动物涎腺功能是一个挑战。另一项挑战是, 在同一动物中反复测量唾液腺功能, 以确定疾病的发病或在治疗后证明恢复。
本报告中描述的拭子方法在技术上是简单的, 可以使用多个选项来表示数据。所得到的结果是可重现的, 但很少有互操作性变化。该方法可检测不同模型涎腺功能障碍的唾液分泌减少。一个重要?...

唾液腺产生唾液, 以响应各种神经和机械刺激1。刺激是通过交感神经和副交感神经系统的肾上腺素和胆碱受体在腺体。匹罗卡品是一种胆碱能交感神经剂, 主要作用于毒蕈受体。在唾液腺, 它通过作用于毒蕈乙酰胆碱受体 M31来诱导唾液的产生。在匹罗卡品管理的唾液生产是一个指标的能力, 唾液腺反应刺激和通常使用作为衡量唾液腺功能。
唾液生产的准确测量是研究涎腺疾病的关键, 包括干燥氏综合征2和头颈癌治疗后的辐射损伤3。几种不同的方法已经被开发, 以测量唾液生产啮齿动物。这些包括排泄涎腺导管的直接插管4, 从口腔中收集的唾液在真空下的5, 并收集使用玻璃毛细管6或微7,8,9. 唾液腺导管的直接插管提供了最准确和纯净的唾液。然而, 这是一个技术上具有挑战性的过程, 和潜在的造成导管损伤排除重复唾液收集来自同一动物。在真空中收集唾液会导致因唾液从管子中干燥而产生的变化。这种损失是进一步夸大小鼠与减少流涎。玻璃毛细管允许收集唾液进行后续分析, 但是, 在患病状态下分泌的唾液粘度的变化防止毛细血管的有效充填。此外, 试图清扫口腔, 以收集残留的唾液可能导致伤害。吸管方法允许完全收集, 对于同一个算子, 它在实验之间是非常一致的。但是, 由于未知的原因, 此方法在不同运算符之间显示出显著的差异。因此, 要允许进行适当的比较, 同样的操作者必须执行与特定项目相关的所有实验。显然, 这是一个实验室的主要劣势。
为了克服这些问题, 制定了一个程序, 将唾液收集方法用于人类和啮齿动物。用棉签法测定匹罗卡品引起的唾液体积简单、重现性好, 不受操作者影响, 可在同一动物中重复进行。此外, 它允许收集唾液, 随后分析蛋白质, 免疫球蛋白, 或其他生物分子。

<table><tbody><tr><td>&lt;strong&gt;Chemicals for saliva collection&lt;/strong&gt;</td><td></td><td></td><td></td></tr><tr><td>Pilocarpine hydrochloride</td><td>Alfa Aesar, Tewksbury, MA, USA</td><td>B21410</td><td>Dilute in sterile isotonic saline. Store single use aliquots of 100X stock at -80&lt;sup&gt;o&lt;/sup&gt;C</td></tr><tr><td>&lt;strong&gt;Name&lt;/strong&gt;</td><td>&lt;strong&gt;Company&lt;/strong&gt;</td><td>&lt;strong&gt;Catalog Number&lt;/strong&gt;</td><td>&lt;strong&gt;Comments&lt;/strong&gt;</td></tr><tr><td>&lt;strong&gt;Anesthesia Mix solution&lt;/strong&gt;</td><td></td><td></td><td>Mix 1 mL ketamine hydrochloride + 0.5 mL xylazine + 8.5 mL sterile isotonic saline in a sterile vial. Can be used for 3 months.</td></tr><tr><td>Zetamine (Ketamine hydrochloride)</td><td>Vet One, Boise, Idaho, USA</td><td>C3N VT1</td><td>Stock is 100 mg/mL</td></tr><tr><td>Anased (Xylazine)</td><td>Med-Vet International, Mettawa, IL, USA</td><td>RXANASED-20</td><td>Stock is 20 mg/mL</td></tr><tr><td>Isotonic sterile saline</td><td>Vet One, Boise, Idaho, USA</td><td>501032</td><td>Used as diluent</td></tr><tr><td>Artificial tears (lubricant ophthalmic ointment)</td><td>Henry Schien, Dublin, OH, USA</td><td>48272</td><td>Used to prevent eyes from drying during the procedure</td></tr><tr><td>&lt;strong&gt;Name&lt;/strong&gt;</td><td>&lt;strong&gt;Company&lt;/strong&gt;</td><td>&lt;strong&gt;Catalog Number&lt;/strong&gt;</td><td>&lt;strong&gt;Comments&lt;/strong&gt;</td></tr><tr><td>&lt;strong&gt;Materials for saliva collection&lt;/strong&gt;</td><td></td><td></td><td></td></tr><tr><td>SalivaBio Children&#039;s swab</td><td>Salimetrics, LLC Carlsbad, CA, USA</td><td>N/A</td><td>Individually wrapped swabs</td></tr><tr><td>50 mL polypropylene tubes</td><td>VWR, Radnor, PA, USA</td><td>89004-364</td><td>Cut off the bottom 1 cm of the tube. Make sure that the cut edge is smooth.</td></tr><tr><td>Microcentrifuge tubes 0.6 mL</td><td>VWR, Radnor, PA, USA</td><td>87003-290</td><td>Make holes in the bottom of tube with heated 18 gauge needles</td></tr><tr><td>Microcentrifuge tubes 2 mL</td><td>VWR, Radnor, PA, USA</td><td>87003-298</td><td></td></tr><tr><td>Insulin Syringes with permanently attached needles</td><td>Becton Dickinson and Company, Franklin Lakes, NJ, USA</td><td>324702</td><td></td></tr><tr><td>18 gauge regular bevel needles</td><td>Becton Dickinson and Company, Franklin Lakes, NJ, USA</td><td>305195</td><td></td></tr><tr><td>Sterile scalpel blade #11</td><td>Integra York Inc PA, USA</td><td>4-311</td><td></td></tr><tr><td>Microdissecting forceps</td><td>Roboz, Gaithersburg, MD, USA</td><td>RS-5139</td><td>Serrated angular 0.8 mm tip, 4&quot; length</td></tr><tr><td>Label tape</td><td>Santa Cruz Biotechnology, Dallas, TX, USA</td><td>sc-224487</td><td></td></tr><tr><td>3 channel timer</td><td>Amazon.com, Seattle, WA, USA</td><td>B06W2KCYVN</td><td></td></tr><tr><td>Analytical Balance</td><td>Mettler Toledo, Columbus OH, USA</td><td></td><td></td></tr><tr><td>&lt;strong&gt;Name&lt;/strong&gt;</td><td>&lt;strong&gt;Company&lt;/strong&gt;</td><td>&lt;strong&gt;Catalog Number&lt;/strong&gt;</td><td>&lt;strong&gt;Comments&lt;/strong&gt;</td></tr><tr><td>&lt;strong&gt;Chemicals/ reagents for inducing salivary dysfunction&lt;/strong&gt;</td><td></td><td></td><td></td></tr><tr><td>LPS</td><td>Invivogen, San Deigo, CA, USA</td><td>tlrl-b5lps</td><td>Dissolve in endotoxin free water, and store stock solution at 5 mg/mL . dilute in sterile HBSS 100 ug/mL - inject 100 uL/ moue ip</td></tr><tr><td>Imject Alum adjuvant</td><td>Thermo Scientific</td><td>77161</td><td>Dilute 1:1 in sterile saline. Inject intraperitoneally 0.1 mL/mouse</td></tr><tr><td>Rabbit anti-Ro52 antiserum</td><td>Generated in lab</td><td></td><td>Immunization of rabbits with recombinant mouse Ro52</td></tr><tr><td>&lt;strong&gt;Name&lt;/strong&gt;</td><td>&lt;strong&gt;Company&lt;/strong&gt;</td><td>&lt;strong&gt;Catalog Number&lt;/strong&gt;</td><td>&lt;strong&gt;Comments&lt;/strong&gt;</td></tr><tr><td>&lt;strong&gt;Chemicals/ Kits for saliva analyses&lt;/strong&gt;</td><td></td><td></td><td></td></tr><tr><td>&lt;strong&gt;Salivary lysozyme estimation&lt;/strong&gt;</td><td></td><td></td><td></td></tr><tr><td>EnzChek Lysozyme Assay Kit</td><td>Molecular Probes, Eugene, OR, USA</td><td>E-22013</td><td>Used as per manufacturer&#039;s instructions</td></tr><tr><td>&lt;strong&gt;Name&lt;/strong&gt;</td><td>&lt;strong&gt;Company&lt;/strong&gt;</td><td>&lt;strong&gt;Catalog Number&lt;/strong&gt;</td><td>&lt;strong&gt;Comments&lt;/strong&gt;</td></tr><tr><td>&lt;strong&gt;Salivary IgA estimation by sandwich ELISA&lt;/strong&gt;</td><td></td><td></td><td></td></tr><tr><td>Mouse IgA</td><td>Southern Biotech, Birmingham, AL, USA</td><td>0106-01</td><td>Standards for sandwich ELISA - range 30 ng/mL to 0.5 ng/mL</td></tr><tr><td>Goat anti- mouse IgA unlabeled</td><td>Southern Biotech, Birmingham, AL, USA</td><td>1040-01</td><td>Coat at 1 ug/mL in bicarbonate buffer</td></tr><tr><td>Goat anti- mouse IgA HRP</td><td>Southern Biotech, Birmingham, AL, USA</td><td>1040-05</td><td>Detection antibody used at 1:4000 dilution</td></tr><tr><td>TMB substrate</td><td>Becton Dickinson and Company, Franklin Lakes, NJ, USA</td><td>555214</td><td>Used as per manufacturer&#039;s instructions</td></tr><tr><td>Immulon 4HBX Microtiter 96 well plates</td><td>Thermo Scientific, Rochester, NY, USA</td><td>3855</td><td></td></tr><tr><td>&lt;strong&gt;Name&lt;/strong&gt;</td><td>&lt;strong&gt;Company&lt;/strong&gt;</td><td>&lt;strong&gt;Catalog Number&lt;/strong&gt;</td><td>&lt;strong&gt;Comments&lt;/strong&gt;</td></tr><tr><td>&lt;strong&gt;Salivary protein estimation&lt;/strong&gt;</td><td></td><td></td><td></td></tr><tr><td>Bio-Rad Protein Assay Dye Reagent Concentrate</td><td>BioRad, Hercules, CA, USA</td><td>5000006</td><td>For protein estimation as per manufacturer&#039;s instructions</td></tr></tbody></table>

a method for the measurement of salivary gland function in mice

干燥氏综合征是一种影响外分泌腺体的自身免疫性疾病, 它会发展涎腺炎症并减少唾液的产生。同样, 在接受放疗治疗头颈部癌症的患者中, 唾液的分泌也受到严重损害。啮齿动物模型, 开发, 以模仿这些临床条件, 促进了解疾病的发病机制, 并允许发展新的治疗策略。因此, 在动物模型中准确、性和反复测量涎腺功能的能力是至关重要的。根据文献中描述的程序, 建立了符合这些标准的方法, 并用于评价小鼠唾液腺功能。这种新方法的另一个优点是它易于掌握, 并具有极少的互操作性变化。唾液腺功能是评估的数量 (重量或体积) 或速率 (毫升/分钟) 的反应产生的匹罗卡品刺激。收集的唾液是分析蛋白质含量、免疫球蛋白浓度和其他生物分子的好来源。

在实验小鼠模型系统中, 以匹罗卡品刺激产生唾液的能力被用作唾液腺功能的指标。用拭子法测定了11周老 C57BL/6 雌性小鼠的唾液分泌。在图 1A中, 结果被表示为在增加的匹罗卡品之后收集的唾液量 (mg)。在1毫克/千克体重的剂量, 一些小鼠开始表现出窘迫 (不由自主的颤抖和颤抖)。因此, 在本研究中没有对1毫克/千克体重的匹罗卡品进行测试。在<strong c...

Watch this Scientific Journal Video about A Method for the Measurement of Salivary Gland Function in Mice at JoVE.com

A Method for the Measurement of Salivary Gland Function in Mice

涎腺功能是自身免疫性疾病和放射治疗的常见后果。小鼠涎腺功能的重现性评价这些疾病的模型是一个技术挑战。在这里, 一个简单的方法, 准确和重复的测量唾液生产的小鼠描述。

小鼠涎腺功能的测定方法

Patients with Sj&#246;gren&#39;s syndrome, an autoimmune disease affecting the exocrine glands, develop salivary gland inflammation and have reduced ...

a-method-for-the-measurement-of-salivary-gland-function-in-mice

Research

JoVE Journal

Immunology and Infection

18.6K 次观看.  Oklahoma Medical Research Foundation. 涎腺功能是自身免疫性疾病和放射治疗的常见后果。小鼠涎腺功能的重现性评价这些疾病的模型是一个技术挑战。在这里, 一个简单的方法, 准确和重复的测量唾液生产的小鼠描述。

视频: A Method for the Measurement of Salivary Gland Function in Mice

Cannulation of the Mouse Submandibular Salivary Gland via the Wharton's Duct

Severe salivary gland hypofunction is frequently found in patients with Sj&ouml;gren's syndrome and those who receiving therapeutic 
irradiation in their head and neck regions for cancer treatment. Both groups of patients experience symptoms such as xerostomia (dry mouth), dysphagia 
(impaired chewing and swallowing), severe dental caries, altered taste, oro-pharyngeal infections (candidiasis), mucositis, pain and discomfort.
One innovative approach of regenerative medicine for the treatment of salivary gland hypo-function is speculated in RS Redman, E Mezey 
et al. 2009: stem cells can be directly deposited by cannulation into the gland as a potent method in reviving the functions of the impaired organ. Presumably, 
the migrated foreign stem cells will differentiate into glandular cells to function as part of the host salivary gland. Also, this cannulation technique is an 
expedient and effective delivery method for clinical gene transfer application.
Here we illustrate the steps involved in performing the cannulation procedure on the mouse submandibular salivary gland via the Wharton's duct 
(Fig 1). C3H mice (Charles River, Montreal, QC, Canada) are used for this experiment, which have been kept under clean conventional conditions at 
the McGill University animal resource center. All experiments have been approved by the University Animal Care Committee and were in accordance with the 
guidelines of the Canadian Council on Animal Care.
For this experiment, a trypan blue solution is infused into the gland through the opening of the Wharton's duct using a 
insulin syringe with a 29-gauge needle encased inside a polyethylene tube. Subsequently, the mouse is dissected to show that the infusions migrated 
into the gland successfully.

A protocol for the cannulation of the mouse submandibular salivary gland via the Wharton's duct is described. For this experiment, the trypan blue solution is used as a dyer to demonstrate how this technique effectively delivers infusions into the targeted gland, and to suggest the reliability of this new approach as a potential clinical drug/cell therapy for the regeneration of salivary glands.

沃顿商学院的导管插管通过小鼠颌下腺唾液腺

Severe salivary gland hypofunction is frequently found in patients with Sj&ouml;gren's syndrome and those who receiving therapeutic 
irradiation in their ...

科研

医学

Isolation of Mouse Salivary Gland Stem Cells

Mature salivary glands of both human and mouse origin comprise a minimum of five cell types, each of which facilitates the production and excretion of saliva into the oral cavity. Serous and mucous acinar cells are the protein and mucous producing factories of the gland respectively, and represent the origin of saliva production. Once synthesised, the various enzymatic and other proteinaceous components of saliva are secreted through a series of ductal cells bearing epithelial-type morphology, until the eventual expulsion of the saliva through one major duct into the cavity of the mouth. The composition of saliva is also modified by the ductal cells during this process.
In the manifestation of diseases such as Sj&ouml;gren's syndrome, and in some clinical situations such as radiotherapy treatment for head and neck cancers, saliva production by the glands is dramatically reduced 1,2. The resulting xerostomia, a subjective feeling of dry mouth, affects not only the ability of the patient to swallow and speak, but also encourages the development of dental caries and can be socially debilitating for the sufferer.
The restoration of saliva production in the above-mentioned clinical conditions therefore represents an unmet clinical need, and as such several studies have demonstrated the regenerative capacity of the salivary glands 3-5. Further to the isolation of stem cell-like populations of cells from various tissues within the mouse and human bodies 6-8, we have shown using the described method that stem cells isolated from mouse salivary glands can be used to rescue saliva production in irradiated salivary glands 9,10. This discovery paves the way for the development of stem cell-based therapies for the treatment of xerostomic conditions in humans, and also for the exploration of the salivary gland as a microenvironment containing cells with multipotent self-renewing capabilities.

An optimized protocol for the isolation of stem cells from the mouse salivary gland is described. The method employs enzymatic and mechanical digestion, and permits isolation of salispheres containing cells with characteristics of stem cells.

鼠标涎腺干细胞的分离

Mature salivary glands of both human and mouse origin comprise a minimum of five cell types, each of which facilitates the production and excretion of ...

生物学

Evaluation of Mammary Gland Development and Function in Mouse Models

The human mammary gland is composed of 15-20 lobes that secrete milk into a branching duct system opening at the nipple. Those lobes are themselves composed of a number of terminal duct lobular units made of secretory alveoli and converging ducts1. In mice, a similar architecture is observed at pregnancy in which ducts and alveoli are interspersed within the connective tissue stroma. The mouse mammary gland epithelium is a tree like system of ducts composed of two layers of cells, an inner layer of luminal cells surrounded by an outer layer of myoepithelial cells denoted by the confines of a basement membrane2. At birth, only a rudimental ductal tree is present, composed of a primary duct and 15-20 branches. Branch elongation and amplification start at the beginning of puberty, around 4 weeks old, under the influence of hormones3,4,5. At 10 weeks, most of the stroma is invaded by a complex system of ducts that will undergo cycles of branching and regression in each estrous cycle until pregnancy2. At the onset of pregnancy, a second phase of development begins, with the proliferation and differentiation of the epithelium to form grape-shaped milk secretory structures called alveoli6,7. Following parturition and throughout lactation, milk is produced by luminal secretory cells and stored within the lumen of alveoli. Oxytocin release, stimulated by a neural reflex induced by suckling of pups, induces synchronized contractions of the myoepithelial cells around the alveoli and along the ducts, allowing milk to be transported through the ducts to the nipple where it becomes available to the pups 8. Mammary gland development, differentiation and function are tightly orchestrated and require, not only interactions between the stroma and the epithelium, but also between myoepithelial and luminal cells within the epithelium9,10,11. Thereby, mutations in many genes implicated in these interactions may impair either ductal elongation during puberty or alveoli formation during early pregnancy, differentiation during late pregnancy and secretory activation leading to lactation12,13. In this article, we describe how to dissect mouse mammary glands and assess their development using whole mounts. We also demonstrate how to evaluate myoepithelial contractions and milk ejection using an ex-vivo oxytocin-based functional assay. The effect of a gene mutation on mammary gland development and function can thus be determined in situ by performing these two techniques in mutant and wild-type control mice.

This method describes how to dissect and assess mammary gland development and function from mice. Excised mammary glands are assessed for the degree of development using whole mount while milk ejection is evaluated using an oxytocin-based myoepithelial cell contraction assay.

乳腺的发育和功能在小鼠模型的评价

The human mammary gland is composed of 15-20 lobes that secrete milk into a branching duct system opening at the nipple. Those lobes are themselves ...

Preparation of Murine Submandibular Salivary Gland for Upright Intravital Microscopy

The submandibular salivary gland (SMG) is one of the three major salivary glands, and is of interest for many different fields of biological research, including cell biology, oncology, dentistry, and immunology. The SMG is an exocrine gland comprised of secretory epithelial cells, myofibroblasts, endothelial cells, nerves, and extracellular matrix. Dynamic cellular processes in the rat and mouse SMG have previously been imaged, mostly using inverted multi-photon microscope systems. Here, we describe a straightforward protocol for the surgical preparation and stabilization of the murine SMG in anesthetized mice for in vivo imaging with upright multi-photon microscope systems. We present representative intravital image sets of endogenous and adoptively transferred fluorescent cells, including the labeling of blood vessels or salivary ducts and second harmonic generation to visualize fibrillar collagen. In sum, our protocol allows for surgical preparation of mouse salivary glands in upright microscopy systems, which are commonly used for intravital imaging in the field of immunology.

We describe a protocol to surgically expose and stabilize the murine submandibular salivary gland for intravital imaging using upright intravital microscopy. This protocol is easily adaptable to other exocrine glands of the head and neck region of mice and other small rodents.

直立活体显微术制备小鼠颌下腺涎腺

The submandibular salivary gland (SMG) is one of the three major salivary glands, and is of interest for many different fields of biological research, ...

免疫与感染

Isolation of Salivary Epithelial Cells from Human Salivary Glands for In Vitro Growth as Salispheres or Monolayers

The salivary glands are a site of significant interest for researchers interested in multiple aspects of human disease. One goal of researchers is to restore function of glands damaged by radiation therapies or due to pathologies associated with Sj&#246;gren's syndrome. A second goal of researchers is to define the mechanisms by which viruses replicate within glandular tissue where they can then gain access to salivary fluids important for horizontal transmission. These goals highlight the need for a robust and accessible in vitro salivary gland model that can be utilized by researchers interested in the above mentioned as well as related research areas. Here we discuss a simple protocol to isolate epithelial cells from human salivary glands and propagate them in vitro. Our protocol can be further optimized to meet the needs of individual studies. Briefly, salivary tissue is mechanically and enzymatically separated to isolate single cells or small clusters of cells. Selection for epithelial cells occurs by plating onto a basement membrane matrix in the presence of media optimized to promote epithelial cell growth. These resulting cultures can be maintained as three-dimensional clusters, termed "salispheres", or grown as a monolayer on treated plastic tissue culture dishes. This protocol results in the outgrowth of a heterogenous population of mainly epithelial cells that can be propagated for 5-8 passages (15-20 population doublings) before undergoing cellular senescence.

We present a method for isolating and cultivating primary human salivary gland-derived epithelial cells. These cells exhibit gene expression patterns consistent with them being of salivary epithelial origin and can be grown as salispheres on basement membrane matrices derived from Engelbreth-Holm-Swarm tumor cells or as monolayers on treated culture dishes.

从人类唾液腺中分离唾液表皮细胞,作为脂质层或单层体进行体外生长

The salivary glands are a site of significant interest for researchers interested in multiple aspects of human disease. One goal of researchers is to ...

Murine Salivary Functional Assessment via Pilocarpine Stimulation Following Fractionated Radiation

Hyposalivation is commonly observed in the autoimmune reaction of Sj&#246;gren's syndrome or following radiation injury to the major salivary glands. In these cases, questions remain regarding disease pathogenesis and effective interventions. An optimized technique that allows functional assessment of the salivary glands is invaluable for investigating exocrine gland biology, dysfunction, and therapeutics. Here, we present a step by step approach to performing pilocarpine stimulated saliva secretion, including tracheostomy and the dissection of the three major murine salivary glands. We also detail the appropriate murine head and neck anatomy accessed during these techniques. This approach is scalable, allowing for multiple mice to be processed simultaneously, thus improving the efficiency of the work flow. We aim to improve the reproducibility of these methods, each of which has further applications within the field. In addition to saliva collection, we discuss metrics for quantifying and normalizing functional capacity of these tissues. Representative data are included from submandibular glands with depressed salivary gland function 2 weeks following fractionated radiation (4 doses of 6.85 Gy).

We present a detailed approach to performing saliva collection, including murine tracheostomy and the isolation of three major salivary glands.

小鼠涎腺照射后通过匹属刺激进行唾液功能评估

Hyposalivation is commonly observed in the autoimmune reaction of Sj&#246;gren's syndrome or following radiation injury to the major salivary glands. In ...

Intravital Microscopy for Imaging Subcellular Structures in Live Mice Expressing Fluorescent Proteins

Here we describe a procedure to image subcellular structures in live rodents that is based on the use of confocal intravital microscopy. As a model organ, we use the salivary glands of live mice since they provide several advantages. First, they can be easily exposed to enable access to the optics, and stabilized to facilitate the reduction of the motion artifacts due to heartbeat and respiration. This significantly facilitates imaging and tracking small subcellular structures. Second, most of the cell populations of the salivary glands are accessible from the surface of the organ. This permits the use of confocal microscopy that has a higher spatial resolution than other techniques that have been used for in vivo imaging, such as two-photon microscopy. Finally, salivary glands can be easily manipulated pharmacologically and genetically, thus providing a robust system to investigate biological processes at a molecular level.
In this study we focus on a protocol designed to follow the kinetics of the exocytosis of secretory granules in acinar cells and the dynamics of the apical plasma membrane where the secretory granules fuse upon stimulation of the beta-adrenergic receptors. Specifically, we used a transgenic mouse that co-expresses cytosolic GFP and a membrane-targeted peptide fused with the fluorescent protein tandem-Tomato. However, the procedures that we used to stabilize and image the salivary glands can be extended to other mouse models and coupled to other approaches to label in vivo cellular components, enabling the visualization of various subcellular structures, such as endosomes, lysosomes, mitochondria, and the actin cytoskeleton.

Intravital microscopy is a powerful tool that enables imaging various biological processes in live animals. In this article, we present a detailed method for imaging the dynamics of subcellular structures, such as the secretory granules, in the salivary glands of live mice.

活体显微镜成像的亚细胞结构的活体小鼠表达荧光蛋白

Here we describe a procedure to image subcellular structures in live rodents that is based on the use of confocal intravital microscopy. As a model organ, ...

小鼠下颌下腺再生的实时实时成像

Interrogating Cell-Cell Interactions in the Salivary Gland via Ex Vivo Live Cell Imaging

Salivary gland regeneration is a complex process involving intricate interactions among various cell types. Recent studies have shed light on the pivotal role played by macrophages in driving the regenerative response. However, our understanding of this critical role has primarily relied on static views obtained from fixed tissue biopsies. To overcome this limitation and gain insights into these interactions in real time, this study outlines a comprehensive protocol for culturing salivary gland tissue ex vivo and capturing live images of cell migration.
The protocol involves several key steps: First, mouse submandibular salivary gland tissue is carefully sliced using a vibratome and then cultured at an air-liquid interface. These slices can be intentionally injured, for instance, through exposure to radiation, to induce cellular damage and trigger the regenerative response. To track specific cells of interest, they can be endogenously labeled, such as by utilizing salivary gland tissue collected from genetically modified mice where a particular protein is marked with green fluorescent protein (GFP). Alternatively, fluorescently-conjugated antibodies can be employed to stain cells expressing specific cell surface markers of interest. Once prepared, the salivary gland slices are subjected to live imaging using a high-content confocal imaging system over a duration of 12 h, with images captured at 15 min intervals. The resulting images are then compiled to create a movie, which can subsequently be analyzed to extract valuable cell behavior parameters. This innovative method provides researchers with a powerful tool to investigate and better understand macrophage interactions within the salivary gland following injury, thereby advancing our knowledge of the regenerative processes at play in this dynamic biological context.

作者聚焦:研究损伤后唾液腺再生中巨噬细胞-上皮细胞的相互作用 

Immunofluorescent imaging is constrained by the ability to observe complex, time-dependent biological processes in just a single snapshot in time. This study outlines a live-imaging approach conducted on precision-cut mouse submandibular gland slices. This approach allows for the real-time observation of cell-cell interactions during homeostasis and the processes of regeneration and repair.

通过离体活细胞成像询问唾液腺中的细胞间相互作用

Salivary gland regeneration is a complex process involving intricate interactions among various cell types. Recent studies have shed light on the pivotal ...

小鼠涎腺功能的测定方法

摘要

探索更多视频

沃顿商学院的导管插管通过小鼠颌下腺唾液腺

鼠标涎腺干细胞的分离

乳腺的发育和功能在小鼠模型的评价

直立活体显微术制备小鼠颌下腺涎腺

从人类唾液腺中分离唾液表皮细胞,作为脂质层或单层体进行体外生长

小鼠涎腺照射后通过匹属刺激进行唾液功能评估

活体显微镜成像的亚细胞结构的活体小鼠表达荧光蛋白

通过离体活细胞成像询问唾液腺中的细胞间相互作用

通过离体活细胞成像询问唾液腺中的细胞间相互作用

通过离体活细胞成像询问唾液腺中的细胞间相互作用