南台生技碩專二 黃國清 指導教授 林宏榮 鄭伯智 the journal of clinical...

南台生技碩專二　黃國清指導教授　林宏榮　鄭伯智

The journal of clinical Investigation Volume 124 Number 1 January 2014

Introduction

胰臟• 外、內分泌功能的腺體• 胰的內分泌部分叫做胰島（蘭氏小島）

– β- 細胞分泌胰島素，降低血糖，促進肝糖原的合成等作用。– α- 細胞分泌升糖素，可以促進肝糖原分解，使血糖升高

• 胰的外分泌腺泡每天製造約 1200~1500c.c. 的胰液，經由胰管送至十二指腸。胰液包括可分解蛋白質、醣類、脂質、核酸的酵素如胰蛋白酶、胰澱粉酶、脂酶、胰凝乳蛋白酶、胰核酸酶，以及可中和胃酸的碳酸氫鈉。

Acute Pancreatitis (AP 急性胰臟炎 )

Acute Pancreatitis Etiology and Pathophysiology

Pancreatic Ducts Pancreatic Ducts become become obstructedobstructed

Hypersecretion of the Hypersecretion of the exocrine exocrine enzymes of pancreasenzymes of pancreas

These enzymes enter the bile These enzymes enter the bile duct, where they are activated duct, where they are activated and with bile back up into the and with bile back up into the pancreatic duct pancreatic duct

Pancreatitis

• 過早將胰酵素活化而引起胰臟自體消化，輕者引起胰臟輕微水腫。重者造成壞死、出血致死可能性。

Acute Pancreatitis Etiology and Pathophysiology

• Trypsinogen胰蛋白酶原 - (a proteolytic enzyme)– Normally released into the small intestine,

where it is activated to trypsin

– In AP, activated to trypsin in the pancreas causing autodigestion of pancreas

內科學誌　　 2013 ： 24 ： 162-180

臨床症狀•上腹痛、腹脹、發燒、嘔吐、吸收不良、腹瀉、血糖不穩、黃疸、腹水、呼吸窘迫或休克等。

合併症•呼吸衰竭、腎衰竭、腸胃道出血、廣泛性血管內凝血、出血性胰臟炎、肋膜積水、廔管形成、假性囊腫、腹膜炎，或甚至死亡。

Acute PancreatitisComplications

Pulmonary Cardiovascular Coagulation Renall Immunological

Pleural Effusion(enzyme inducedInflammation of

Diaphragm)

AtelectasisAbdominal distention& diaphragmatic

movement

3rd spacing BP, HR

Vasoconstriction d/tSNS activation

Trypsin activatesboth clotting

& lysing factors DIC & PE

HypovolemiaGFR

Renal perfusionClots in renal

circulationATNARF

GI motility bacteria outside GIPancreatic abscess

Necrosisinfection

11

診斷急性胰臟炎的診斷需要下列三點中的任何兩點( 一 ) 腹痛：急性發作而且持續以及劇烈的上腹部痛，往往會擴散到背部( 二 ) 血清脂肪酶或澱粉酶上升超過正常值的三倍( 三 ) 獨特的影像學檢查

急性胰臟炎的診斷與治療之最新進展 :內科學誌　　2013 ： 24 ： 162-180

• Intraacinar activation of proteolytic enzymes

• Microcirculatory injury  • Leukocyte chemoattraction, release of

cytokines, and oxidative stress 

• One of the most feared complications of acute pancreatitis (AP) is infection and bacterial colonization of the necrotic pancreas

• TLR4 activation is one of the mechanisms by which bacterial translocation may account for the development of severe experimental AP

Carbon monoxide (CO)

• Carbon monoxide (CO) is increasingly recognized as a cytoprotective and homeostatic molecule

• The antiinflammatory and protective properties of CO are supported by accumulating evidence in animal models of cardiovascular disease, inflammatory disorders, and organ transplantation

Cardiovascular Research: Volume 41, Issue 2, 1 February 1999

• Transition metal carbonyls, termed CO-releasing molecules (CO-RMs), have been used in biological systems to deliver CO

Goal of this study

• Treatment effect of CO in AP• Molecular biology study of CO in AP

Results

CORM-2 ameliorates established experimental AP

• choline-deficient diet supplemented with DL- ethionine (CDE) feeding

– severe hemorrhagic AP associated with significant mortality

Lung myeloperoxidase (MPO) a measure of pulmonary leukostasis

CORM-2 suppresses systemic proinflammatory cytokines and TNF-α production by spleen and pancreati

c macrophages

Nature Reviews Rheumatology 4, 319-327 (June 2008)

Lineage-positive (Lin+) cells are a mix of all cells expressing mature cell lineage markers. For example for mouse bone marrow: Mac-1 for myeloid cells, CD4 and CD8 for T-cells, CD19 or B220 for B-cells, Ter-119 for erythrocytes, ect. The rest of the cells are lineage-negative (Lin-) – they are not stained by the lineage antibodies. All stem and progenitor cell activity was identified withing Lin- population, but not in Lin+ cells.

http://stemcellassays.com/2009/11/what-is-lineage-negative-cells/

CORM-2 inhibits TLR4-mediated TNF-α production in mouse and human mon

ocyte/macrophages

• Use calcium binding protein A8 (S100A8) and HMGBl to activate TLR4

Scientific Reports 3, Article number: 2960 (2013)

Nature Reviews Rheumatology 7, 416-426 (July 2011)

http://www.invivogen.com/review-damp

生技所碩專研一　黃國清Kidney International (2014) 86, 525–537.

Kidney International’s 2013 Impact Factor is 8.520

High-mobility group box 1 (HMGB1)

• has been recognized as an essential damage-associated molecular pattern (DAMP) molecule

High-mobility group box 1 (HMGB1)

• previously was thought to function only as a nuclear factor that enhances transcription

• recently discovered to be a crucial cytokine that mediates the response to infection, injury and inflammation

NATURE REVIEWS | IMMUNOLOGY: 2005(5):331-342

CORM-2 reduces macrophage TLR4/MD2 receptor expression

during AP

Front. Immunol., 25 July 2014

CORM-2 decreases LPS binding to TLR4/MD2 receptor

complex

Ablation of TLR4 in hematopoietic cells confers

protection against AP

CORM-2-primed cells ameliorate experimental AP

• caerulein hyperstimulation mild to moderate AP

CORM-2-primed cells ameliorate experimental AP

Carbon Monoxide (CO) 一氧化碳

• Given the potential toxicity of systemically administered CO-RMs or CO,

• the authors tested whether monocytes/macrophages primed via CORM-2 pretreatment

• CORM-2-primed cell transfer. 1. BM cells were isolated from Balb/c mice 2. CD11b-enriched cells were treated with eith

er VE or 100 μ M CORM-2 overnight. 3. PBS, 5 × 106 cells were transferred i.v. into

mice undergoing caerulein-induced pancreatitis, 90 minutes after the first caerulein injection

謝謝聆聽　歡迎討論