黃秀權(quán) 岑蘭英 王語陽(yáng) 蘇拾香 覃月秋
【摘要】 胰腺癌惡性程度極高,早期診斷困難,患者確診時(shí)多已發(fā)展到中晚期,錯(cuò)失最佳治療時(shí)間,預(yù)后差,嚴(yán)重影響人類的健康,所以通過篩查以便及早發(fā)現(xiàn)癌癥對(duì)延長(zhǎng)胰腺癌患者的壽命十分重要,但也只有在高危人群中進(jìn)行篩查才能達(dá)到利益最大化。因此,明確胰腺癌的危險(xiǎn)因素尤為重要。本文根據(jù)近年來胰腺癌的研究資料,闡述胰腺癌發(fā)病的危險(xiǎn)因素,以期為胰腺癌防治提供參考。
【關(guān)鍵詞】 胰腺癌 危險(xiǎn)因素 綜述
Review of Risk Factors Associated with Pancreatic Cancer/HUANG Xiuquan, CEN Lanying, WANG Yuyang, SU Shixiang, QIN Yueqiu. //Medical Innovation of China, 2023, 20(36): -188
[Abstract] The malignant degree of pancreatic cancer is extremely high, and early diagnosis is difficult. Most patients have developed to the middle and late stages when diagnosed, missing the best treatment time and poor prognosis seriously affect human health. Therefore, early detection of cancer through screening is very important to prolong the life span of pancreatic cancer patients, but only screening in high-risk groups can achieve maximum benefits. Therefore, it is particularly important to identify the risk factors for pancreatic cancer. Based on the research data of pancreatic cancer in recent years, the risk factors of pancreatic cancer are described in this paper, in order to provide reference for the prevention and treatment of pancreatic cancer.
[Key words] Pancreatic cancer Risk factor Review
First-author's address: Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, China
doi:10.3969/j.issn.1674-4985.2023.36.041
胰腺癌(pancreatic cancer,PC)是消化道常見的惡性腫瘤,其發(fā)病率和死亡率呈逐年上升趨勢(shì)。由于預(yù)后不良,PC的死亡率幾乎與發(fā)病率相當(dāng),是人類癌癥死亡的第七大原因[1]。根據(jù)對(duì)28個(gè)歐洲國(guó)家的研究,預(yù)計(jì)到2025年P(guān)C將超過乳腺癌,成為癌癥死亡的第三大原因[2]。根據(jù)中國(guó)國(guó)家癌癥中心2021年統(tǒng)計(jì)數(shù)據(jù)顯示,PC位居我國(guó)男性惡性腫瘤發(fā)病率的第7位,女性第11位,居癌癥相關(guān)死亡率的第6位[3]。
胰腺是一個(gè)狹長(zhǎng)的腹膜后位器官,橫置于腹后壁1~2腰椎體平面,其緊鄰胃、十二指腸、肝臟、膽管及椎旁肌肉,由于其解剖位置的特殊性,PC起病隱匿,早期癥狀不明顯,直到病情進(jìn)展才出現(xiàn)腹痛、腹脹、消化不良、黃疸、消瘦、腰背部疼痛等非特異性臨床癥狀,與其他消化道疾病較難鑒別,且易造成誤診、漏診。PC的診斷主要依靠影像學(xué)、實(shí)驗(yàn)室檢查和病理學(xué)檢查,得益于醫(yī)療技術(shù)的飛速發(fā)展,PC的診出率較前提高,但這些方法對(duì)早期病變的診斷能力仍有限。迄今為止,PC最好的治療手段仍是外科手術(shù)切除[4],但PC早期診斷困難,多數(shù)經(jīng)確診的患者均已發(fā)展至中晚期并發(fā)生轉(zhuǎn)移,失去了手術(shù)治療的機(jī)會(huì),導(dǎo)致該病愈后極差,5年生存率僅為1%~5%[5-6]。故對(duì)于PC而言,最應(yīng)強(qiáng)調(diào)疾病的一級(jí)預(yù)防,即病因預(yù)防。但PC的病因仍不明確,本文就現(xiàn)有研究發(fā)現(xiàn)的與PC發(fā)病相關(guān)的危險(xiǎn)因素做綜述。
1 個(gè)體因素
1.1 年齡
多數(shù)腫瘤的發(fā)病往往與年齡相關(guān),PC也不例外。有研究發(fā)現(xiàn),年齡是PC發(fā)病的獨(dú)立危險(xiǎn)因素,其發(fā)病率隨年齡的增長(zhǎng)而增加[7-8],大多數(shù)患者被診斷為PC的年齡在40~80歲[9]。
1.2 性別
多項(xiàng)研究發(fā)現(xiàn),性別與PC的發(fā)生具有相關(guān)性,男性的發(fā)病率要普遍高于女性[7,10],有學(xué)者統(tǒng)計(jì)指出,男性群體PC的發(fā)病率和死亡率均為女性群體的1.46倍[2]。這可能與男性群體更容易暴露于吸煙、飲酒等危險(xiǎn)因素有關(guān)。
1.3 種族
相較于白種人和黃種人,黑種人PC的發(fā)生率和死亡率均較高[11-12]。且在我國(guó)新疆的一項(xiàng)研究也發(fā)現(xiàn),不同民族PC患者的生存時(shí)間有顯著差異[13],但該研究并不認(rèn)為種族是PC發(fā)病的獨(dú)立危險(xiǎn)因素,究其原因,可能是該因素與其他因素,如飲食習(xí)慣等共同作用所致。
1.4 血型
國(guó)內(nèi)外多項(xiàng)研究提示血型與PC的發(fā)生有關(guān)。有研究認(rèn)為,非O型血的人群患PC的風(fēng)險(xiǎn)更高[14-15]。然而,我國(guó)學(xué)者的另一項(xiàng)研究卻顯示O型血人群患PC的風(fēng)險(xiǎn)更高[16]?;谝陨喜煌Y(jié)論,血型是否為PC的發(fā)病危險(xiǎn)因素,仍需進(jìn)一步探究。
1.5 體內(nèi)維生素D含量
維生素D能作為一種類固醇激素參與到細(xì)胞的生長(zhǎng)與分化中。研究發(fā)現(xiàn),人體內(nèi)維生素D代謝產(chǎn)物25-羥基維生素D的含量與PC發(fā)病率呈負(fù)相關(guān)[17-18],相關(guān)研究認(rèn)為PC發(fā)病機(jī)制可能是維生素D能抑制癌細(xì)胞的增殖、誘導(dǎo)其凋亡[19]。有研究認(rèn)為,維生素D改變腫瘤微環(huán)境,從而抑制腫瘤的生長(zhǎng)[20]。
2 不良生活習(xí)慣
2.1 吸煙
煙草已被世界衛(wèi)生組織列為人類Ⅰ類致癌物,在我國(guó)23種癌癥可控危險(xiǎn)因素中,吸煙被認(rèn)為是腫瘤發(fā)生最常見的環(huán)境危險(xiǎn)因素[21]。研究發(fā)現(xiàn),無論當(dāng)前還是曾經(jīng)吸煙,其患PC的風(fēng)險(xiǎn)均比從不吸煙的人群顯著增高,即使戒煙多年,患病風(fēng)險(xiǎn)仍會(huì)持續(xù)存在[22-23]。澳大利亞的一項(xiàng)研究表明,戒煙能降低PC的發(fā)生風(fēng)險(xiǎn),戒煙越早,PC患病風(fēng)險(xiǎn)越低[24]。
2.2 飲酒
既往大量研究表明,酒精是多種惡性腫瘤的發(fā)病危險(xiǎn)因素,且腫瘤的發(fā)病率隨飲酒量、飲酒年限的增加而增加[25]。有學(xué)者對(duì)全球500多項(xiàng)研究分析發(fā)現(xiàn),長(zhǎng)期大量飲酒的人群PC的發(fā)病風(fēng)險(xiǎn)會(huì)顯著增加[26]。Pang等[27]基于中國(guó)的一項(xiàng)大樣本前瞻性隊(duì)列也發(fā)現(xiàn),每周飲酒且酒精含量超過420 g的人群,其PC發(fā)病風(fēng)險(xiǎn)約為不飲酒人群的1.6倍。
2.3 肥胖
隨著生活物質(zhì)水平的提高,社會(huì)上肥胖人群顯著增加,而肥胖與PC等多種癌癥的發(fā)生發(fā)展有關(guān)。研究表明,與正常體重者相比,體重指數(shù)(BMI)>24 kg/m2的人群中,PC的發(fā)病風(fēng)險(xiǎn)明顯增加[7]。并且有學(xué)者認(rèn)為,兒童時(shí)期體型肥胖與成年后患PC的風(fēng)險(xiǎn)存在密切聯(lián)系[28]。
2.4 飲食習(xí)慣
胰腺會(huì)分泌胰液參與食物的消化吸收,而不恰當(dāng)?shù)娘嬍辰Y(jié)構(gòu)可能會(huì)誘發(fā)PC的發(fā)生。有研究發(fā)現(xiàn),長(zhǎng)期大量攝入高脂、高糖食物及肉類,可以增加PC的發(fā)病風(fēng)險(xiǎn)[29]。反之,有研究發(fā)現(xiàn),增加水果、蔬菜、大豆等低熱量食物可降低PC的發(fā)病風(fēng)險(xiǎn)[30-31]。有研究認(rèn)為增加有抗氧化作用的葉酸和蛋氨酸的攝入量[32],則可降低PC的發(fā)病風(fēng)險(xiǎn)。
3 疾病因素
3.1 糖尿病
有學(xué)者認(rèn)為糖尿病家族史、2型糖尿病均可增加PC的發(fā)生風(fēng)險(xiǎn)[33]。一項(xiàng)大樣本隊(duì)列研究表明,相較于血糖正常人群,2型糖尿病患者PC的發(fā)病風(fēng)險(xiǎn)可增加2.17倍[34]。
3.2 高脂血癥
有關(guān)研究認(rèn)為,血脂異常與惡性腫瘤的發(fā)展具有相關(guān)性。低密度脂蛋白膽固醇升高的人群,其血液系統(tǒng)惡性腫瘤發(fā)生的風(fēng)險(xiǎn)會(huì)增加約15倍[35]。而相較于血脂水平正常的人群,在高密度脂蛋白膽固醇降低的人群中,其生命周期內(nèi)出現(xiàn)惡性腫瘤的風(fēng)險(xiǎn)增加了約6.5倍[36]。近年我國(guó)學(xué)者也發(fā)現(xiàn)總膽固醇(TC)、甘油三酯(TG)、低密度脂蛋白膽固醇(LDL-C)升高、高密度脂蛋白膽固醇(HDL-C)降低均與PC的發(fā)病相關(guān)[7]。
3.3 高血壓病
報(bào)道指出,高血壓可促進(jìn)PC的發(fā)生發(fā)展[37]。有研究認(rèn)為高血壓與PC預(yù)后存在緊密聯(lián)系[38]。高血壓還能加速PC患者死亡[39]。有人進(jìn)行統(tǒng)計(jì)分析發(fā)現(xiàn),高血壓還能增加PC術(shù)后復(fù)發(fā)率[40]。
3.4 乙肝病毒感染
我國(guó)是乙肝感染大國(guó),現(xiàn)有乙肝感染人數(shù)不下1億人,而乙肝病毒感染不僅會(huì)導(dǎo)致肝癌的發(fā)生,還會(huì)誘使其他多系統(tǒng)惡性腫瘤的發(fā)生發(fā)展。研究顯示,無論是乙肝病毒攜帶者還是慢性乙型病毒性肝炎患者,其PC的發(fā)病風(fēng)險(xiǎn)均顯著增加,并且乙肝病毒感染還會(huì)減少PC患者的生存時(shí)間[41]。
3.5 幽門螺桿菌感染
一項(xiàng)Meta分析顯示,在亞洲人群中,幽門螺桿菌感染與PC的發(fā)病有關(guān),其OR值為2.22[42]。Ai等[43]進(jìn)行的一項(xiàng)研究顯示,PC患者幽門螺桿菌感染率顯著高于對(duì)照組,由此推測(cè)幽門螺桿菌可能是PC發(fā)病的高危因素。
3.6 慢性胰腺炎
有基礎(chǔ)研究認(rèn)為,慢性胰腺炎可加速表達(dá)K-RasG12V致癌基因小鼠的PC發(fā)展,在減緩慢性胰腺炎發(fā)展后,其PC的進(jìn)程也得到延緩[44]。也有報(bào)道指出,在患有慢性胰腺炎的人群中,發(fā)生PC的風(fēng)險(xiǎn)明顯高于無慢性胰腺炎的人群[45]。
3.7 遺傳
PC具有家族聚集性的特點(diǎn),并且有5%~10%的PC與可遺傳的基因突變有關(guān)[46],其中以KRAS基因突變與之最密切[47]。還有學(xué)者發(fā)現(xiàn),相較于沒有PC家族史的人群,有家族史的人群PC的發(fā)病率顯著升高,并且發(fā)現(xiàn)有2個(gè)或以上PC直系親屬者,其生命周期中患PC的概率為23%[48]。此外,PC還與幾種高度特異性遺傳綜合征相關(guān),如Peutz-Jeghers綜合征患者生命周期中患PC的危險(xiǎn)性明顯增加[49]。
PC已取代肝癌成為新“癌中之王”,其早期癥狀不典型,診斷困難,且愈后極差,因此PC的預(yù)防最為關(guān)鍵。研究發(fā)現(xiàn)PC的發(fā)病與某些生物因素、不良生活方式、不合理營(yíng)養(yǎng)及某些疾病有緊密關(guān)系,因此,為預(yù)防PC的發(fā)生,應(yīng)該做到戒煙戒酒、合理飲食;對(duì)于患有高血壓、糖尿病、乙肝病毒感染、幽門螺桿菌感染、慢性胰腺炎,或具有家族性遺傳病、PC家族史的40歲以上的人群,更應(yīng)做到定期體檢,以期達(dá)到預(yù)防或早期發(fā)現(xiàn)PC的目的。
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(收稿日期:2023-08-23) (本文編輯:何玉勤)