Bryosphere within an Antarctic moss pillar

第6回極域科学シンポジウム分野横断セッション：[IB2] 地球環境変動の解析と地球生命システム学の構築11月19日（木）　統計数理研究所 セミナー室1（D305

極限環境適応における微生物ゲノムの生命情報学

第6回極域科学シンポジウム分野横断セッション：[IB2] 地球環境変動の解析と地球生命システム学の構築11月19日（木）　統計数理研究所 セミナー室1（D305

Bicuspid aortic valve endocarditis complicated by perivalvular abscess

A 37-year-old man presenting with fever and chest pain was admitted to our hospital. Electrocardiogram showed sinus tachycardia and complete left bundle branch block. Transthoracic echocardiogram showed infective endocarditis in the bicuspid aortic valve, complicated by multiple hyperechoic vegetations and severe aortic regurgitation. Blood cultures were negative and intravenous empiric antibiotic therapy was begun. However, fever lasted for 7 days and follow-up echocardiography revealed a newly emerged perivalvular abscess. The patient eventually underwent an urgent aortic root replacement that confirmed the echocardiographic findings. Our case report emphasizes that all patients with suspected aortic valve endocarditis should undergo early and followup echocardiographic studies

Genome-wide Environmental Adaptation of an Antarctic Bacterium

第3回極域科学シンポジウム/第34回極域生物シンポジウム 11月27日（火） 国立極地研究所 ３階ラウン

シン サルコイドーシス シンダン ノ テビキ ニオケル カクシュ シンダン モダリティー ノ ケントウ

Background : Sarcoidosis is a multiple organ granulomatous disease of undefined cause. Although cardiac involvement often leads to adverse outcomes in patients with sarcoidosis, diagnosis of cardiac sarcoidosis（CS）remains difficult due to the lack of sensitive diagnostic tests. Purpose : To determine an appropriate combination of diagnostic tests for detecting CS. Method and Results : Thirteen patients were diagnosed with CS from December ２００６ to November２０１０by the use of２００６revised guidelines for diagnosing CS of the Japanese Society of Sarcoidosis and Other Granulomatous Disorders. Positive rate of each major or minor criterion in the guidelines was examined. We also evaluated positive rate of each diagnostic test. In the major criteria, basal thinning of the ventricular septum showed a high positive rate of７１．４％, although the others were less than５０％. In the minor criteria, positive rates of abnormal electrocardiogram findings and abnormal echocardiogram were７６．９％ and８４．６％, respectively. Late gadolinium enhancement （LGE）of the myocardium on cardiac MRI scanning（CMR）showed a positive rate of１００％ ; however, CMR was not performed in four patients due to life-threatening arrhythmia. All１３patients showed abnormal findings at least in either echocardiogram or LGE on CMR. Conclusion : Echocardiography is a convenient diagnostic test for detecting CS. The combination of cardiac MRI and echocardiography may improve diagnostic sensitivity

ニンシン オ ケイキ ニ ジョウミャク ケッセンショウ オ ハッショウシ センテンセイ アンチトロンビンIII ケッソンショウ ト シンダン サレタ イチレイ

Congenital antithrombin III (AT III) deficiency is an inherited autosomal dominant disorder. Patients often suffer from recurrent venous thromboses that are triggered by several occasions (operation, gestation, trauma, oral contraceptive drug etc.). Moreover, 60% of them are said to be associated with pulmonary embolism. The patient of this report is 27-year-old pregnant woman in the first trimester. She felt pain in the back of her head and left auricle and presented with dyslexia and aphasia in late of March, 20XX. Getting CT brain scan, MRI brain scan, and blood sampling at the nearby hospital, she was suspected of having thrombosis of left sigmoid and transverse sinus due to AT III deficiency. Because she wanted to give birth to her first child without termination, she was referred to our hospital. We used heparin as the anticoagulant therapy because warfarin had the risk of teratogenesis. But in condition of low serum level of AT III activity, it didn’t work effectively. So we also did frequent complement of AT III. Strict anticoagulant therapy resulted in better outcome for both the patient and her baby without fatal venous thromboses or fetal complications

Functional divergence within class B MADS-box genes TfGLO and TfDEF in Torenia fournieri Lind

Homeotic class B genes GLOBOSA (GLO)/PISTILLATA (PI) and DEFICIENS (DEF)/APETALA3 (AP3) are involved in the development of petals and stamens in Arabidopsis. However, functions of these genes in the development of floral organs in torenia are less well known. Here, we demonstrate the unique floral phenotypes of transgenic torenia formed due to the modification of class B genes, TfGLO and TfDEF. TfGLO-overexpressing plants showed purple-stained sepals that accumulated anthocyanins in a manner similar to that of petals. TfGLO-suppressed plants showed serrated petals and TfDEF-suppressed plants showed partially decolorized petals. In TfGLO-overexpressing plants, cell shapes on the surfaces of sepals were altered to petal-like cell shapes. Furthermore, TfGLO- and TfDEF-suppressed plants partially had sepal-like cells on the surfaces of their petals. We isolated putative class B gene-regulated genes and examined their expression in transgenic plants. Three xyloglucan endo-1,4-beta-d-glucanase genes were up-regulated in TfGLO- and TfDEF-overexpressing plants and down-regulated in TfGLO- and TfDEF-suppressed plants. In addition, 10 anthocyanin biosynthesis-related genes, including anthocyanin synthase and chalcone isomerase, were up-regulated in TfGLO-overexpressing plants and down-regulated in TfGLO-suppressed plants. The expression patterns of these 10 genes in TfDEF transgenic plants were diverse and classified into several groups. HPLC analysis indicated that sepals of TfGLO-overexpressing plants accumulate the same type of anthocyanins and flavones as wild-type plants. The difference in phenotypes and expression patterns of the 10 anthocyanin biosynthesis-related genes between TfGLO and TfDEF transgenic plants indicated that TfGLO and TfDEF have partial functional divergence, while they basically work synergistically in torenia

Unsuspected eukaryotic diversity of aquatic moss pillars inhabiting a freshwater lake in East Antarctica, based on 18S rRNA gene analysis

第2回極域科学シンポジウム/第33回極域生物シンポジウム 11月18日（金） 統計数理研究所 3階リフレッシュフロ

極域細菌のゲノム進化

第6回極域科学シンポジウム分野横断セッション：[IB2] 地球環境変動の解析と地球生命システム学の構築11月19日（木）　統計数理研究所 セミナー室1（D305

Microfloral association for nitrogen cycling in an Antarctic moss pillar inferred from phylogenetic analyses

第3回極域科学シンポジウム/第34回極域生物シンポジウム 11月27日（火） 国立極地研究所 ３階ラウン