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JCEM:嗜铬细胞瘤或副神经节瘤是如何影响糖耐量的?

2017-07-21 MedSci MedSci原创

嗜铬细胞瘤和副神经节瘤是起源于位于肾上腺髓质(嗜铬细胞瘤)及其它肾上腺素能系统(副神经节瘤)的嗜铬组织的肿瘤;临床上分泌大量儿茶酚胺激素引起高血压及其它剧烈的心血管症状;既往的研究发现它们往往还能损害糖耐量。然而,这些肿瘤对胰岛素敏感性和胰岛素分泌的影响还不清楚。因此,来自日本的科学人员探讨了嗜铬细胞瘤或副神经节瘤对糖耐量的影响,并综合分析了这些肿瘤患者的胰岛素分泌和胰岛素敏感性相关的各种参数。研

嗜铬细胞瘤和副神经节瘤是起源于位于肾上腺髓质(嗜铬细胞瘤)及其它肾上腺素能系统(副神经节瘤)的嗜铬组织的肿瘤;临床上分泌大量儿茶酚胺激素引起高血压及其它剧烈的心血管症状;既往的研究发现它们往往还能损害糖耐量。然而,这些肿瘤对胰岛素敏感性和胰岛素分泌的影响还不清楚。

因此,来自日本的科学人员探讨了嗜铬细胞瘤或副神经节瘤对糖耐量的影响,并综合分析了这些肿瘤患者的胰岛素分泌和胰岛素敏感性相关的各种参数。研究的主要内容如下:

在肿瘤切除后对患者进行高血糖葡萄糖钳夹和高胰岛素正常血糖钳夹技术以及口服葡萄糖耐量试验(OGTT)。其中,11例是嗜铬细胞瘤患者和2例是副神经节瘤患者。主要观察指标为高血糖葡萄糖钳夹和高胰岛素正常血糖钳夹技术及OCTT确定的与胰岛素分泌和胰岛素敏感性相关的的各种参数。

研究发现,嗜铬细胞瘤和副神经节瘤的肿瘤切除术能减少尿儿茶酚胺排泄,进而改善糖耐量。手术后,在高血糖葡萄糖钳夹技术过程中,在胰岛素分泌的第一阶段(不是第二阶段)及OGTT测定过程中,胰岛素分泌指数得到了改善,但未观察到胰岛素总分泌量的明显改善。手术后在高胰岛素正常血糖钳夹过程中测定的胰岛素敏感指数保持不变。

这些结果表明,嗜铬细胞瘤和副神经节瘤造成的糖耐量减低主要通过胰岛素分泌障碍产生,特别是胰岛素分泌反应的早期阶段的分泌障碍。为了进一步证实当前的结果,需要未来进行更多的前瞻性研究。

原始出处:

Komada H, Hirota Y,et al.Insulin secretion and insulin sensitivity before and after surgical treatment of pheochromocytoma or paraganglioma.J Clin Endocrinol Metab. 2017 Jun 28. doi: 10.1210/jc.2017-00357. [Epub ahead of print]

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    2018-05-12 achengzhao
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    2018-04-10 smallant2015
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    2017-07-23 fengxx
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50岁男性阵发性呼吸困难2个月,查找病因一波三折。在排除众多可能后,甚至曾一度考虑是否为精神因素(癔症)所致呼吸困难。经扩大诊断思路,进一步检查,最终发现了病因所在。常见病总是常见的,但“少见病”毕竟是存在的。或许正如福尔摩斯所说:“排除一切不可能的,剩下的即使再不可能,那也是真相。”

JCEM:恶性嗜铬细胞瘤和副神经节瘤预后的相关因素有那些?(大型长期研究)

副神经节源肿瘤起源于副交感神经节简称“副节”。副节乃对交感神经干中的神经节相对而言,大多位于交感神经干之侧旁,偶尔亦见于内脏等远离的部位。副节按其主细胞对铬盐的反应有嗜铬性与非嗜铬性之别,故副神经节瘤亦有嗜铬性与非嗜铬性之分。嗜铬性副节瘤以肾上腺髓质为主要代表,由其发生的肿瘤习惯称“嗜铬细胞瘤”(Pheochromocytoma);而非嗜铬性副节发生的肿瘤则往往简称“副节瘤”,文献中也称之为“非嗜

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