JP4276691B2 - 男性不妊関連遺伝子プロタミン−2変異と男性不妊の診断方法 - Google Patents
男性不妊関連遺伝子プロタミン−2変異と男性不妊の診断方法 Download PDFInfo
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- Apparatus Associated With Microorganisms And Enzymes (AREA)
Description
Rubio C, et al. Human Reprod 2001; 10: 2084-2092 Lee PA, et al. (2000) J Urol., 164(5), 1697-1701 Cram DS, et al. (2001) J Androl 22(5), 738-746 Thielemans BFJ, et al. Eur. J. Obst Gynec 1998; 81: 217-225 Wouters-Tyrou, D. et al. (1998) Biochimie, 80, 117-128 Sassone-Corsi P. (2002) Science, 296, 2176-2178 McKay, D. J. et al. (1986) Eur. J. Biochem., 158, 361-366 Krawetz, S. A. et al. (1989) Genomics. 5, 639-645 Reeves, R. H. et al. (1989) J. Hered, 80, 442-446 Lee, K. et al. (1995) Proc. Nat.l. Acad. Sci. USA, 92, 12451-12455 Balhorn, R. et al. (1988) Experientia., 44, 52-55 Belokopytova, J. A. et al. (1993) Mol. Reprod. Dev., 34, 53-57 de Yeba, L. et al. (1993) J. Biol. Chem., 268: 10553-10557 Schlicker, M. et al. (1994) Hum Reprod., 9, 2313-2317 de Yebra, L. et al. (1998) Fertil Steril., 69, 755-759
1. 方法
1-1. 被験者とゲノムDNAの抽出
プロタミン遺伝子の分析には、合計258例の不妊患者を精液学に従って複数の下位群に分けた。153例(59%)は非閉塞性の無精子症であり、73例(28%)には重度の精子減少症(精子数は5×106細胞/ml未満)、28例(11%)は精子運動性が低い無力精子症であり、4例(2%)が精子の数、形態および運動に異常がない特発性不妊症であった。対照群としては、前記と同様の健常者270例を対象とした。
1-2. プロタミン-1および-2ゲノムDNAの変異同定
ゲノムDNAはプロテアーゼおよびフェノールを用いた公知の方法によって血液から単離した。5'および3'の側面領域の両方におけるポリメラーゼ連鎖反応(PCR)プライマーセットを2種類構築し、これらのプロタミンのゲノムDNAを増幅した。プロタミン-1(Domenjoud, L. et al. (1990) Genomics, 8, 127-133)では、5'プライマーには転写開始部位上流の-42から-19までの24個のオリゴヌクレオチド(P1A; cccctggcatctataacaggccgc:配列番号6)、そして3'プライマーにはカノニカルポリA追加シグナルAATAAAの下流492から515までの24個のオリゴヌクレオチド(P1B; tcaagaacaaggagagaagagtgg:配列番号7)を用いた。プロタミン-2(Domenjoud, L. et al. (1990) Genomics, 8, 127-133)では5'プライマーには+49から+72までの24個のオリゴヌクレオチド(P2A; ctccagggcccactgcagcctcag:配列番号8)、3'プライマーには625から648までの24個のオリゴヌクレオチド(P1B; gaattgctatggcctcacttggtg:配列番号9)を用いてPCR増幅を行った。このプライマー設定により、ここではプロタミン-1および-2遺伝子の-42から515までの557個のポリヌクレオチド(配列番号4)と、49から648までの599個のポリヌクレオチド(配列番号1)をそれぞれ増幅することができた(図2)。なお、PCR条件は次のとおりとした;プロタミン-1では96℃で変性(45秒)、66℃でアニーリング(45秒)、および72℃で伸張(1分)を40サイクルにわたり行い、プロタミン-2では98℃で変性(10秒)、68℃でアニーリング(45秒)、および72℃で伸張(45秒)を40サイクルにわたり行った。PCR増幅した断片の精製をSUPREC PCRスピンカラム(Takara, Siga, Japan)を用いて行い、熱サイクルシーケンス分析(ABI, CA, USA)を行った。DNAシーケンスの決定は同じPCRプライマーを用いて行った。
2. 結果
2-1. ヒトプロタミン-1 DNAの配列分析
PCRにより増幅された557bpのDNA断片は204から294までの91個のヌクレオチドから成るイントロンを含んでいた(配列番号4、図1)。各プライマー内部の509bp中のSNPsの同定を、557bpのDNA断片に対する配列分析により行った(図1)。全てのDNA試料がほぼ等量のPCR産物を増幅したことから、プライマー配列領域にはSNPsは一切含まれていないことが確認された。男性不妊患者を対象にSNPの発現率を評価し、生殖能力が証明されたボランティアの場合と比較した。合計528例の男性被験者(不妊患者258例と対象の生殖能力を持つボランティア270例)において、SNPsは5箇所で発見され、うち4箇所は133、160、320および321番目のコーディング領域に、1箇所は431番の3'未翻訳領域に存在していた(図1および表2)。観察されたSNPsは全てアミノ酸の変化を引き起こさなかった(サイレント変異)。a133g、c160gおよびg320aに位置する3箇所のSNPsと、14および46番目のアミノ酸に位置するSNP(図1)は全てメジャーホモ接合とヘテロ接合であり、マイナーホモ接合SNPsは見られなかった(表2)。47番目アミノ酸に位置する他のc321a SNPでは、不妊症および生殖能力を持つ対照母集団において、それぞれ56.6%(146例)および47.8%(129例)がホモ接合メジャーc/cタイプであり、34.5%(89例)および43.3%(117例)がヘテロ接合(c/a)、そして8.9%(23例)および8.9%(24例)がホモ接合マイナータイプ(a/a)SNPであった。3'非コーディング領域におけるa431g SNPに加えて、これらのSNPはいずれもアミノ酸変化を生じず、不妊症患者において生殖能力の証明されたボランティアより有意に発生率が高いことも示されなかった(表2:なお、表2におけるヌクレオチド位置は図1のヌクレオチド位置に対応している)。
2-2. ヒトプロタミン-2 DNAの配列分析
各プライマー内部の551bpにおけるSNPsを、599bpのDNA断片(配列番号1)に対する配列分析により同定した(図2)。全てのPCRは、アガロースゲル電気泳動上で調べてほぼ等量のDNAを増幅したため、プライマー配列領域はSNPsを含んでいないことを確認した。ここでは、プロタミン-2遺伝子の599個のヌクレオチド中に3箇所のSNPsが観察されたが、1箇所はエクソン中に、2箇所はイントロン内に存在していた(図2)。248番ヌクレオチドにおける1箇所のヘテロ接合SNPはcからtへ変化しており、グルタミンをストップコドンに変えているものであるが、これは153例の無精子症患者のうち1例の不妊症患者にのみ観察され、270例の生殖可能な対照母集団中には見られなかった(表2)。この変化は、たとえヘミ接合状態であったとしても無精子症の原因に関連している可能性がある。さらにイントロン内部にはg398cとa473cの2箇所のSNPsが見られた。g398cでは、不妊症および生殖可能な対照母集団中において、それぞれ57.4%(148例)および47.0%(127例)がメジャー型のホモ接合、34.1%(88例)および43.7%(118例)がヘテロ接合(g/c)、そして8.5%(22例)および8.9%(24例)がマイナーホモ接合(c/c)型であった。さらに、g/a型である異なったヘテロ接合SNPの存在が1例の対照群において観察された。もう一つのa473cのSNPでは、不妊症および生殖可能な対照母集団中においてそれぞれ56.6%(146例)および47.0%(127例)がメジャー型のホモ接合、34.9%(90例)および43.7%(118例)がヘテロ接合、そして8.5%(22例)および9.3%(25例)がc型のマイナーホモ接合型であった。これらのイントロンSNPsの不妊症の母集団における発現率は、生殖能力の証明されたボランティアでの場合に対して有意差がなかった(表2)。
Claims (13)
- 男性不妊関連遺伝子プロタミン-2から転写されるmRNAに相補的なポリヌクレオチドであって、配列番号1のDNA配列において第248位cがtに置換されているポリヌクレオチドまたはその相補配列からなるポリヌクレオチド。
- 請求項1のポリヌクレオチドの一部であって、その変異箇所を含む20〜100の連続したDNA配列からなるオリゴヌクレオチドまたはその相補配列からなるオリゴヌクレオチド。
- 請求項1のポリヌクレオチドをPCR増幅するためのプライマーセットであって、一方のプライマーが、変異箇所を含む15〜30の連続したDNA配列またはその相補配列からなるオリゴヌクレオチドであるプライマーセット。
- 請求項1のポリヌクレオチドの発現産物であって、配列番号2のアミノ酸配列の第1-49位までのアミノ酸配列からなるポリペプチド。
- 配列番号2の第50-91位、または配列番号3の第1-11位のアミノ酸配列からなるオリゴペプチドを抗原として作製された抗体。
- 男性不妊の検査方法であって、被験者から単離した染色体DNA中に請求項1のポリヌクレオチドが存在するか否かを検出することを特徴とする方法。
- 被験者から単離した染色体DNAまたはそのmRNAと、請求項1のポリヌクレオチド、または請求項2のオリゴヌクレオチド、もしくはそれらの相補配列からなるポリヌクレオチドまたはオリゴヌクレオチドがストリンジェントな条件下でハイブリダイズするか否かを検出する請求項6の方法。
- 被験者から単離した染色体DNAまたはmRNAを鋳型とし、請求項3のプライマーセットを用いてPCRを行った場合のPCR産物の有無を検出する請求項6の方法。
- 男性不妊の検査方法であって、被験者から単離した生体試料中に請求項4のポリペプチドが存在するか否かを検出することを特徴とする方法。
- 被験者から単離した生体試料中に、請求項5の抗体には反応しないポリペプチドが存在するか否かを検出する請求項9の方法。
- 請求項2のオリゴヌクレオチドを標識化したことを特徴とする男性不妊検査用DNAプローブ。
- 請求項2のオリゴヌクレオチドを含むことを特徴とする男性不妊検査用DNAチップ。
- 請求項5の抗体を標識化したことを特徴とする標識化抗体。
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JP2008067649A (ja) * | 2006-09-14 | 2008-03-27 | Osaka Univ | 妊孕性診断キット、変異検出方法、ポリヌクレオチド、及びポリペプチド |
JP2008237114A (ja) * | 2007-03-27 | 2008-10-09 | Osaka Univ | 妊孕性診断キット、変異検出方法、ポリヌクレオチド、ポリペプチド、発現ベクター、及び発現キット |
CN101775371B (zh) * | 2009-12-02 | 2012-03-14 | 唐爱发 | 一种抗睾丸hTSC29蛋白的抗体或抗体片段及其应用 |
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CN102262159B (zh) * | 2010-05-27 | 2014-03-26 | 李建远 | 用于检测生育相关人睾丸和附睾表达305种精子定位蛋白的方法 |
US9177098B2 (en) | 2012-10-17 | 2015-11-03 | Celmatix Inc. | Systems and methods for determining the probability of a pregnancy at a selected point in time |
US10162800B2 (en) | 2012-10-17 | 2018-12-25 | Celmatix Inc. | Systems and methods for determining the probability of a pregnancy at a selected point in time |
US9836577B2 (en) | 2012-12-14 | 2017-12-05 | Celmatix, Inc. | Methods and devices for assessing risk of female infertility |
NZ758970A (en) | 2013-11-07 | 2022-10-28 | Ozgene Holdings Pty Ltd | Compositions and methods for producing genetically modified animals |
CN103743910B (zh) * | 2013-12-27 | 2015-11-18 | 上海市计划生育科学研究所 | Ctbs蛋白作为精卵结合受体的靶点在筛选精卵结合抑制剂中的应用 |
KR20160113222A (ko) * | 2014-01-27 | 2016-09-28 | 셀매틱스, 인크. | 유전자 영역이 불임과 연관되는지 여부를 평가하는 방법 |
US10208350B2 (en) | 2014-07-17 | 2019-02-19 | Celmatix Inc. | Methods and systems for assessing infertility and related pathologies |
US10030241B2 (en) | 2015-03-30 | 2018-07-24 | General Electric Company | Methods and kits for capturing sperm nucleic acids |
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US9194874B2 (en) | 2009-03-17 | 2015-11-24 | Toppan Printing Co., Ltd. | Test method for male fertility by detecting a mutation in the PGAM4 gene |
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US7842783B2 (en) | 2010-11-30 |
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