• The Korean Journal of Physiology and Pharmacology
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• 제3권2호
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• pp.223-230
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• 1999

Alterations of cardiovascular function associated with various thyroid states have been studied. In hyperthyroidism left ventricular contractility and relaxation velocity were increased, whereas these parameters were decreased in hypothyroidism. The mechanisms for these changes have been suggested to include alterations in the expression and/or activity levels of various proteins; ${\alpha}-myosin$ heavy chain, ${\beta}-myosin$ heavy chain, ${\beta}-receptors,$ the guanine nucleotide-binding regulatory protein, and the sarcolemmal $Ca^{2+}-ATPase.$ All these cellular alterations may be associated with changes in the intracellular $Ca^{2+}$ concentration. The most important regulator of intracellular $Ca^{2+}$ concentration is the sarcoplasmic reticulum (SR), which serves as a $Ca^{2+}$ sink during relaxation and as a $Ca^{2+}$ source during contraction. The $Ca^{2+}-ATPase$ and phospholamban are the most important proteins in the SR membrane for muscle relaxation. The dephosphorylated phospholamban inhibits the SR $Ca^{2+}-ATPase$ through a direct interaction, and phosphorylation of phospholamban relieves the inhibition. In the present study, quantitative changes of $Ca^{2+}-ATPase$ and phospholamban expression and the functional consequences of these changes in various thyroid states were investigated. The effects of thyroid hormones on (1) SR $Ca^{2+}$ uptake, (2) phosphorylation levels of phospholamban, (3) SR $Ca^{2+}-ATPase$ and phospholamban protein levels, (4) phospholamban mRNA levels were examined. Our findings indicate that hyperthyroidism is associated with increases in $Ca^{2+}-ATPase$ and decreases in phospholamban levels whereas opposite changes in these proteins occur in hypothyroidism.

• 대한임상검사과학회지
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• 제54권1호
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• pp.28-37
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• 2022

임신은 갑상선 기능 검사의 중요한 해석을 필요로 하며 임신 중 갑상선 기능 이상과 외부 바이러스성 감염 인자들의 항체의 존재는 태아 및 산모의 건강에 영향을 미치기에 임신에서 갑상선 기능의 선별적 평가가 요구된다. 본 연구에서는 임신기간 동안 정상 산모들의 선택적 산전 감염인자 검사 항목 중에서 갑상선 관련 인자와 바이러스성 감염 인자의 임신시기별 상호 연관성을 알아보고자 하는 후향적 단편 실태조사이다. 분석한 결과를 살펴보면, T3는 나이가 증가함에 따라 감소하고, 특히 HCV가 양성인 그룹에서 양의 유의성을 보였다(P<0.01). 또한 HIV가 음성이지만 임계치에 근접하거나 쌍둥이 임산부에서는 FT4가 유의한 증가를 나타냈다(P<0.05). TSH는 30대 연령에서 높게 분포하였으며, 다른 바이러스성 감염인자와는 통계적 유의성이 나타나지 않았다. 또한, TSH의 결과 값을 삼분위로 나누어 분석한 결과, FT4와 T3은 양의 상관성을 보였으나 TSH와는 음의 상관성을 보였다(P<0.05). 따라서 본 연구를 통해서 임신 중 산전검사인 갑상선 검사와 바이러스성 감염인자의 검사를 통한 임신 중 평가는 임신 경과시간, 감염인자의 노출상태 및 정량적 수치의 상태를 반영하여 이루어져야 할 것이며, 갑상선 관련 내분비 인자에 대한 산전검사의 유용성에 대한 평가의 보완이 이루어져야 할 것으로 사료된다.

• Asian-Australasian Journal of Animal Sciences
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• 제20권2호
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• pp.172-177
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• 2007

Thyroid hormones play an important role in regulating metabolism and can affect homeostasis of fat depots. The gene encoding thyroglobulin (TG), producing the precursor for thyroid hormones, has been proposed as a positional and functional candidate gene for a QTL with an effect on fat deposition. The SNP occurs in the 5' promoter region of the TG gene and is widely used in marker assisted selection (MAS) programs to improve the predictability of marbling level and eating quality in beef cattle. In this study, we identified three SNPs at the 5' promoter region of the TG gene in Korean cattle. Of the three SNPs identified in TG gene, the C257T and A335G were previously unreported new SNPs. The sequence data were submitted to GenBank (GenBank accession number: AY615525). The previously reported C422T SNP showed three genotypes, CC, CT and TT, by digestion with the restriction enzyme MflI using the PCR-RFLP method. A new allelic variant corresponding to the C${\rightarrow}$T and A${\rightarrow}$G mutations at positions 257 and 335, respectively, could be detected by the SSCP analysis. The gene-specific SNP marker association analysis indicated that the C422T SNP marker was significantly associated (p<0.05) with marbling score. Animals with the CC and CT genotypes had higher marbling score than those with the TT genotype. Results from this study suggest that TG gene-specific SNP may be a useful marker for meat quality traits in future MAS programs in Korean cattle.

• Asian-Australasian Journal of Animal Sciences
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• 제10권4호
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• pp.385-390
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• 1997

Fifteen Ettawah-cross does were used to study maternal serum concentrations of total triiodothyronine ($T_3$), teraiodothyronine ($T_4$) and cortisol in different status of pregnancy (nonpregnant, aborted, single and twin-bearing does) during late pregnancy. Analysis of the data indicated that here was no significant changes in total $T_3$, $T_4$, and cortisol concentrations with the advance of pregnancy. Concentrations of $T_3$, $T_4$, and cortisol decreased by 38.9, 34.9, and 32.6%, and 12.0, 15.7 and 27.6%, and 41.6, 44.0, and 43.7% in the aborted, single and, twin-bearing, respectively, as compared to those nonpregnant does. These was no significant difference in concentrations of $T_3$ and cortisol between aborted, single and twin-bearing does, and in those of $T_4$ between aborted and single-bearing does. However, $T_4$ concentrations in twin-bearing were lower by 17.7 and 14.1% than those in aborted and single-bearing does, respectively. The decreased concentrations of thyroid hormones in pregnant does suggested that fetus could have increased iodine uptake from maternal circulation causing a decrease in the availability of this nutrient for synthesis of maternal thyroid hormones. The decreased concentrations of cortisol could have been associated with the increased metabolism of the hormone to regulate nutrients influx into the placenta of pregnant does.

• 사상체질의학회지
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• 제4권1호
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• pp.193-212
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• 1992

Comparative hormones quantities on the blood analysis was carried out to investigate the hormones specific characters on the blood in four types of physical constitution. Thyroid-stimulating (TSH), triiodothyronine($T_3$), triiodothyronine uptake($T_3$ uptake), free triiodothyronine(free $T_3$), thyroxine($T_4$), free thyroxine (free $T_4$), thyroxine-binding globulin(TBG), adrenocorticotropic hormone(ACTH), luteinizing hormone(LH), testosterone were measured. The results obtained were summarized as follows: 1. The value of thyroid-stimulating hormone(TSH) on the constitution didn't shown significant difference, while the value of So-EUM-IN was increased and SO-YANG-IN was decreased. 2. The value of triiodothyronine($T_3$) on the constitution didn't shown significant difference, while the value of TAE-EUM-IN was decreased. 3. The value of triiodothyronine uptake($T_3$ uptake) on the constitution didn't shown significant difference, but between the value of TAE-EUM-IN and SO-EUM-IN, TAE-EUM-In and SO-YANG-IN showed significant difference. 4. The value of free triiodothyronine(free $T_3$) on the constitution didn't shown signifcant difference, but between the value of TAE-EUM-IN and SO-EUM-In, TAE-EUM-In and SO-YANG-IN showed significant difference. 5. The value of thyroxine($T_4$) on the constitution didn't shown significant difference, while the value of TAE-EUM-IN and SO-YANG-IN showed difference. 6. The value of free thyroxine(free $T_4$) on the constitution didn't shown significant difference, but between the value of TAE-EUM-IN and SO-YANG-IN showed significant difference. 7. The value of thyroxine-binding globulin(TBG) on the constitution didn't shown significant difference. 8. The value of adrenocorticotropic hormone(ACTH) on the constitution didn't shown significant difference. 9. The value of luteinizing hormone(LH) on the constitution didn't shown significant difference, but between the value of TAE-EUM-IN and SO-EUM-IN, TAE-EUM-IN and SO-YANG-IN showed significant difference. 10. The value of testosterone on the constitution didn't shown significant difference.

• Clinical and Experimental Pediatrics
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• 제48권2호
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• pp.143-147
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• 2005

목 적 : 갑상선 기능은 여러 질환이나 스트레스에 의해서 영향을 받는 것으로 알려져 있다. 저자들은 분만 전과 분만 동안의 여러 인자와 제대혈 갑상선자극호르몬 및 갑상선호르몬 농도와의 상관관계를 알아보고자 본 연구를 시행하였다. 방 법 : 총 130명의 신생아를 대상으로 분만 즉시 제대혈을 10 mL 채취하여 갑상선자극호르몬, $T_3$와 유리 $T_4$ 농도를 방사면역학적 방법(CIS bio international kit, Germany)으로 측정하였다. 재태연령, 출생체중, 가사, 분만방식, 산모의 당뇨병 유무, 산모의 전자간증 유무 등에 따라 갑상선자극호르몬과 갑상선 호르몬 농도를 비교하였다. 결 과 : 1) 제대혈 갑상선자극호르몬 농도는 재태연령 34주 이하 $1.73{\pm}0.48{\mu}IU/mL$, 34주-37주 $2.60{\pm}0.51{\mu}IU/mL$, 38주 이상 $4.26{\pm}0.40{\mu}IU/mL$으로 재태연령의 증가에 따라 증가하였다(P<0.05). 2) 분만형태를 비교하면 질식 분만 군 $4.42{\pm}0.66{\mu}IU/mL$, 제왕절개 분만 군 $3.31{\pm}0.33{\mu}IU/mL$로 질식 분만 군에서 높았다(P<0.05). 3) 가사에 따른 갑상선자극호르몬 농도는 가사가 있는 군 $5.18{\pm}0.93{\mu}IU/mL$로 가사가 없는 군 $2.97{\pm}0.84{\mu}IU/mL$에 비해 유의하게 높았다(P<0.05). 4) 산모의 당뇨병에 따른 갑상선자극호르몬 농도는 당뇨병 군 $8.91{\pm}1.25{\mu}IU/mL$, 없는 군 $4.32{\pm}0.42{\mu}IU/mL$으로 산모 당뇨병 동반시 유의하게 높았다(P<0.05). 5) 산모에게 전자간증이 있는 군의 갑상선자극호르몬 농도는 $5.28{\pm}0.42{\mu}IU/mL$, 없는 군 $3.65{\pm}0.46{\mu}IU/mL$에 비해 유의하게 높았다(P<0.05). 6) $T_3$와 유리 $T_4$ 농도는 가사 군에서 없는 군보다 유의하게 낮았다(P<0.05). 7) 각 변수 간의 영향을 배제하였을때 임신주수, 1분 Apgar 점수, 산모의 당뇨병만이 독립적으로 제대혈의 갑상선자극호르몬 농도에 영향을 미치는 것으로 나타났다. 결 론 : 제대혈 갑상선자극호르몬 및 갑상선호르몬 농도는 산모의 당뇨병이나 산모 전자간증과 같은 분만 전 요인과 태아에게 저산소증을 초래할 수 있는 분만시 스트레스와 밀접한 연관이 있다.

• 한국콘텐츠학회논문지
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• 제14권11호
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• pp.347-354
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• 2014

한국중앙암등록본부는 2011년도 남녀 전체에서 갑상선암의 유병률을 19.6%(1위)로 보고했다. 특히 여자는 5배정도 많이 발생하였으며, 전체 여성암 중 31.1%(1위)를 차지했다. 연령군별 갑상선암 발생 현황에서도 조발생률이 15~34세 군에서 남녀 모두 가장 높게 나타났다. 이처럼 갑상선은 다른 질환에 비교하여 호르몬의 영향이 크다. 따라서 활동력이 왕성한 중간 연령대인 20~25세 사이의 젊은 층의 경우 정기적인 검진이 필요하다. 본 연구는 이러한 중간층에 속하는 20~25세 연령 군에서 자가검진 평가와 초음파 스크리닝 영상 분석을 실시하여 갑상선의 변화를 알아보았다. 연구 결과, 전체 대상자 457명 중 213명(46.6%)이 초음파검사 영상에서 갑상선에 비정상 에코 패턴이 있는 것으로 확인되었다. 여자의 비정상 패턴은 석회화 낭성이 73.4%, 미만성저에코가 11.8%, 낭성 에코가 7.3%로 확인되었다. 남자는 석회화 낭성이 61.1%, 협부(Isthmus)의 크기 증가가 19.4%, 미만성저에코가 13.9% 등의 순으로 조사되었다. 자가진단의 기능항진증분석 결과, 초음파 검사에서 비정상 에코 패턴으로 확인된 대상자들의 평균 점수가 6.85점이고, 정상은 5.88점 이였다. 비정상 응답자가 약 15% 높게 나타났다.

• 대한방사선기술학회지:방사선기술과학
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• 제40권1호
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• pp.135-142
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• 2017

천연물에 존재하는 셀레늄(Se)은 생체의 산화환원작용을 주관하는 중요한 단백질의 하나인 셀레늄함유단백질(selenoprotein)의 중요한 요소로 알려져 있다. 셀레늄(Se)을 Rat에 경구 투여하여 10 Gy의 방사선을 조사 시킨 후 갑상선을 표적 장기로 삼고 1일, 7일, 21일 기간에 따른 혈구성분의 변화, 갑상선호르몬(T3, T4)의 변화, 항산화효소((Glutathione Peroxidase, GPx)의 활성 변화, 갑상선 조직 변화 관찰을 통하여 셀레늄(Se)의 방사선 방호 작용을 알아보고자 하였다. 실험결과 조혈 면역계(혈색소농도, 호중구, 혈소판)에서 회복을 보이는 유의한 방호 효과가 있었다(p<0.05). 항산화효소인 Glutathione Peroxidase(GPx) 활성과 표적 장기인 갑상선 호르몬(T3, T4)의 활성 변화 결과에서도 유의성 있는 활성 변화를 보였으며(p<0.05), 조직 변화 관찰에서는 방사선 처리에 의한 세포 괴사를 일으킨 갑상선 세포 손상 보호 효과가 있음을 확인하였다. 따라서, 셀레늄(Se)은 떨어진 생체의 면역 활성 효과를 유도함으로써 방사선 방어제로 활용될 수 있을 것이라 판단된다.

• Journal of Yeungnam Medical Science
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• 제29권2호
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• pp.77-82
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• 2012

AMP-activated protein kinase (AMPK) is an important cellular fuel sensor. Its activation requires phosphorylation at Thr-172, which resides in the activation loop of the ${\alpha}1$ and ${\alpha}2$ subunits. Several AMPK upstream kinases are capable of phosphorylating AMPK at Thr-172, including LKB1 and CaMKK${\beta}$ ($Ca^{2+}$/calmodulin-dependent protein kinase kinase${\beta}$). AMPK has been implicated in the regulation of physiological signals, such as in the inhibition of cholesterol fatty acid, and protein synthesis, and enhancement of glucose uptake and blood flow. AMPK activation also exhibits several salutary effects on the vascular function and improves vascular abnormalities. AMPK is modulated by numerous hormones and cytokines that regulate the energy balance in the whole body. These hormone and cytokines include leptin, adiponectin, ghrelin, and even thyroid hormones. Moreover, AMPK is activated by several drugs and xenobiotics. Some of these are in being clinically used to treat type 2 diabetes (e.g., metformin and thiazolidinediones), hypertension (e.g., nifedipine and losartan), and impaired blood flow (e.g., aspirin, statins, and cilostazol). I reviewed the precise mechanisms of the AMPK activation pathway and AMPK-modulating drugs.

• Asian-Australasian Journal of Animal Sciences
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• 제12권7호
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• pp.1135-1141
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• 1999

A large number of investigations have shown that changes in nutritional condition affect endocrine status in avian species. Herein, recent findings including novel peptides discovered by the development of the techniques in the field of molecular biology have been reviewed. The insulin-like growth factors (IGF-I and IGF-II) found in chickens have been characterized and shown to be 70 and 66 amino acid polypeptides, respectively. Plasma IGF-I level is very responsive to nutrition, Le. varying dietary proteins and energy intakes, and food restriction. Plasma IGF-II concentration is altered by nutritional deprivation to a much smaller extent than plasma IGF-I concentration. Almost all of the serum and tissue IGFs are found in a complex composed of IGF and IGF-binding protein (IGFBP). In the chicken plasma, the major IGFBP differs from that in mammalian plasma. The proglucagon mRNA encodes glucagon and two glucagon-like peptides (GLP-I and GLP-2). The intracerebroventricular administration of GLP-l strongly decreased food intake of chicks, and it was indicated that the inhibition of food intake by GLP-l was associated with neuropeptide Y, which is one of the neurotransmitters reported to enhance food intake.