A Study of LVEF in Patients of Subclinical Thyroid Dysfunction with Heart Failure

Heart failure is clinically defined as a syndrome caused by cardiac dysfunction generally resulting from myocardial muscle dysfunction or loss. Heart failure is a leading cause of hospitalization in people older than 65. Extensive evidence indicates that the cardiovascular system responds to the minimal but persistent changes in circulating thyroid hormone levels, which are typical of individuals with subclinical thyroid dysfunction. Subclinical hypothyroidism is associated with impaired LV diastolic function and subtle systolic dysfunction and an enhanced risk for atherosclerosis and myocardial infarction. Methods: A total of 200 patients between age group of 45 to 75 yrs, presenting in medical emergency and medical outdoor of Guru Nanak Dev Hospital, Government Medical College Amritsar with heart failure were studied.Comparison of Thyroid Profile and LVEF was done at Baseline, 3 months and 6 months. Results: The change in TSH, FT3, FT4, LVEF was significant at 3 months and 6 months as compared to baseline. Changes in FT4, LVEF, were significant at 3 months and 6 months, thus signifying progression of disease and worsening of cardiac functions. Conclusion: In treatment group in subclinical hyporthyroidism patients, after comparing the thyroid profile and 2D Echocardiography after 6 months; TSH, LVEF both have shown improvement (p <0.05).

Influence of early treatment of pregnancy combined with subclinical hypothyroidism on pregnancy outcome / 中国基层医药

Objective To analyze the influence of early treatment of pregnancy combined with subclinical hypothyroidism (SCH) during pregnancy on pregnancy outcome.Methods From January 2013 to June 2015,128 pregnant women who were diagnosed as SCH in the Maternal and Child Health Hospital of Beilun District were randomly divided into the observation group and control group according to the digital table,with 64 cases in each group.The observation group was given levothyroxine early treatment,while the control group adopted conventional hospitalization,unexposed.Pregnancy outcomes of the two groups were analyzed.Results After treatment,the incidence rates of complications in the observation group:preeclampsia (4.69％),poor fetal growth (1.56％),premature rupture of membranes (7.81％),less amniotic fluid volume (4.69％),placental abruption (0％),postpartum hemorrhage (3.12％);the incidence rates of complications in the control group:preeclampsia (17.19％),poor fetal growth (10.94％),premature rupture of membranes (21.88％),less amniotic fluid volume (15.63％),placental abruption (6.25％),postpartum hemorrhage (12.50％),and there were statistically significant differences between two groups (x2 =5.133,4.800,5.006,4.195,4.129,3.905,P =0.023,0.028,0.025,0.041,0.042.0.048).After treatment,the incidence rates of adverse pregnancy outcomes:preterm birth (3.12％),cesarean section (60.94％),abortion (0.00％),fetal distress (4.69％),perinatal death (0.00％);the incidence rates of adverse pregnancy outcomes in the control group:preterm birth (12.50％),cesarean section (79.69％),abortion (7.81％),fetal distress (15.63％),perinatal death (6.25％),and the differences between the two groups were statistically significant (x2 =3.905,5.389,5.203,4.195,4.129,P =0.048,0.020,0.023,0.041,0.042).Conclusion Pregnancy complicated with SCH has different degree influence on patients with obstetric complications and outcome of pregnancy,early effective drug treatment can significantly reduce the incidence of obstetric complications and adverse pregnancy outcomes.

Effect of levothyroxine replacement therapy on adipocyte expression in subclinical hypothyroidism rats / 中华地方病学杂志

Objective To observe the changes of adiponectin (APN),chemerin and tumor necrosis factor-α (TNF-α) in subclinical hypothyroidism (SCH) rats,and to clarify the effect of L-thyroxine (L-T4) replacement therapy.Methods Sixty-five male Wistar rats were randomly divided into five groups via the random number table method:control group (n =10),SCH group A (n =15),SCH group B (n =15),SCH group C (n =15) and L-T4 treatment group (SCH + L-T4,n =10).Rats in groups SCH A,B and C were fed with 5,15 and 20 mg·kg-1·d-1 methimazole (MMI) once daily by gavage.The rats in SCH + L-T4 group were given 20 mg·kg-1·d-1 MMI once daily through gavage,after 8 weeks,6 μg·kg-1· d-1 of L-T4 was intragastrically added (50 μg/tablet) and the model was completed at the 16th week.The levels of serum APN,chemerin and TNF-α were measured via the enzyme linked immunosorbent assay (ELISA) method.The mRNA and protein levels of APN,chemerin and TNF-α in visceral adipose tissue of 5 groups were determined by real-time PCR (RT-PCR) and Western blotting,respectively.Results Compared with the control group [(202.20 + 17.27) ng/L,(143.70 ± 18.46) ng/L,(114.69 ± 4.18) μg/L],the serum chemerin levels in the SCH A,B,C groups were significantly higher [(314.33 ± 16.80),(355.00 ± 17.10),(365.00 ± 11.63) ng/L,P ＜0.05] and TNF-α levels also increased significantly [(222.60 ± 14.13),(279.20 ± 12.79),(288.30 ± 15.89) ng/L,P ＜0.05],and APN levels were significantly decreased [(77.21 ± 3.08),(68.58 ± 2.92),(59.45 ± 2.41) μg/L,P ＜0.05];but compared with SCH group C,the levels of chemerin and TNF-α in the SCH + L-T4 group were decreased [(260.07 ± 10.80),(178.40 ± 10.29) ng/L] and the level of APN [(102.35 ± 3.17) μg/L] was increased (P＜ 0.05).The mRNA and protein levels of APN in SCH A,B,C groups were significantly lower than those in the control group (P ＜0.05).The APN mRNA and protein levels in the SCH + L-T4 group were significantly higher than those in the SCH group C (P ＜ 0.05).The mRNA and protein levels of chemerin and TNF-α in the SCH A,B,C groups were higher than those in the control group (P ＜ 0.05).However,the mRNA and protein levels of chemerin and TNF-α in the SCH + L-T4 group were significantly lower than those in the SCH group C (P ＜ 0.05).Conclusion The expression levels of serum chemerin and TNF-α in SCH rats have increased,and APN levels decreased,but L-T4 can ameliorate these changes.

Differentiated Thyroid Carcinoma in Cambodia: A Single-Center Experience

OBJECTIVE: The goal of our study was to identify the prevalence of differentiated thyroid cancer and the results of surgical and postoperative hormone treatment of patients with thyroid cancer at Sihanouk Hospital Center of HOPE (SHCH) in Cambodia. METHODS: We retrospectively collected data of all patients diagnosed with thyroid carcinoma from 2005 to 2014 in the surgical department of SHCH. The results of preoperative clinical assessment, laboratory tests, ultrasound, and fine needle aspiration cytology (FNAC) were correlated with the final histological findings. RESULTS: SHCH operated 587 cases of thyroid gland. Among those patients 36 cases (6.13%) are diagnosed as thyroid cancer managed by surgery and thyroid stimulating hormone (TSH) hormonal suppressed treatments postoperatively. Among the 36 patients with differentiated thyroid carcinoma (DTC), 35 (97.23%) were females and one (2.77%) was male. The median age is 44 years old. Patients living in Phnom Penh are in high prevalence. Papillary carcinoma was the most prevalent of histopathological type (n=33, 91.66%). We performed FNAC in 22 cases but only 11 patients (28.20%) had positive results for cancer and they received total thyroidectomy. The remaining patients had lobectomy or lobectomy with isthmusectomy and subsequent total thyroidectomy. All 36 patients have been taking L-thyroxine for TSH suppression, and they are still alive and continue their follow-up every 3 months regularly. CONCLUSION: We conclude that total thyroidectomy results in a lower risk for tumor recurrence and improved survival rates in DTC. It is clear that after initial surgery, whether or not radioiodine therapy is administered, we suggest L-thyroxine therapy to prevent hypothyroidism and to minimize potential TSH stimulation of tumor growth.

Effect of IK1 agonist zacopride on L-thyroxine-inducedventricular remodeling in rats / 中国药理学通报

Aim To examine the effect of zacopride,a specific inward rectifier potassium channel(IK1)agonist,on L-thyroxine(T4)-induced ventricular remodeling and the underlying mechanism.Methods SD rats were randomly divided as control,L-thyroxine(L-thy,1 mg·kg-1·d-1,ig,10 d)model,L-thy +zacopride(5,15,50 μg·kg-1,respectively,ip),L-thy+zacopride(15 μg·kg-1)+chloroquine(7.5 μg·kg-1,ip)and L-thy+captopril(100 mg·kg-1·d-1,drinking water)groups.Echocardiography and cardiac hypertrophic indexes were measured to confirm the establishment of the ventricular remodeling model.The changes of IK1 and L-calcium current(ICa-L)were detected by whole cell patch clamp technique.The confocal microscopy and fluorescent indicator Fluo-4 were applied to examine the intracellular Ca2+ concentration([Ca2+]i)of isolated adult rat ventricular myocytes.Results L-thyroxine induced left ventricular hypertrophy with increased ratio of heart weight(HW)to body weight(HW·BW-1),ratio of left ventrical weight(LVW)to body weight(LVW·BW-1),left ventricular dimension in diastole(LVIDd),left ventricular dimension in systole(LVIDs),interventricular septum thickness(IVS)and decreased ejection fraction(EF),fractional shortening(FS)(P<0.01).Patch clamp data suggested IK1 was downregulated,while ICa-L was upregulated(P<0.01).In isolated adult cardiomyocytes,L-thyroxine increased the cell area and [Ca2+]i(P<0.01).Zacopride treatment obviously alleviated cardiac remodeling,improved cardiac function,reversed the changes of IK1 and ICa-L,and significantly attenuated intracellular calcium overload(P<0.01).The optimum dose of zacopride in vivo was 15 μg·kg-1 at which the effect was compared favourably with captopril,a classical anti-remodeling agent.Low-dose IK1 atagonist chloroquine could reverse the effect of zacopride(P<0.01).Conclusion Via activating IK1,zacopride could significantly decrease Ca2+ influx and intracellular calcium overload thereby inhibiting L-thyroxine-induced cardiac ventricular remodeling.

The protective effect of shenmaisanjie capsule combined with methimazole on L-thyroxine-induced hyper-thyroid hepatic damage in rats / 实用医学杂志

Objective To explore the protective effects and mechanism of shenmaisanjie capsule(SMSJC) combined with methimazole on the L?thyroxine? induced hyperthyroid hepatic damage in rats. Methods so rats were divided into 5 groups randomly as normal group,model group,SMSJC group(0.48 g/kg),methimazole group (12 mg/kg)and combination group. With the exception of the normal group ,all rats were administered L?thyroxine (800 μg/kg ,ig) daily for 6 weeks. Rats were sacrificed. Blood and liver samples were collected for detecting thyroid and liver function , histological analysis and hepatic activity of SOD , GSH?Px and MDA content. Results The levels of T3,T4,FT3,FT4,ALT,AST,ALP,TBIL in serum and hepatic MDA content declined significantly. Hepatic activity of SOD ,GSH?Px increased obviously. Liver morphologic changes improved in methimazole group and combination group,whereas no significant difference of serum FT3,FT4,TSH level and liver activities of SOD and GSH?Px was noticed in SMSJC group in comparison to model group. Compared with SMSJC or methimazole mono?therapy ,the effect of combination therapy was obvious. However ,serum TRAb level was not significantly different in five groups of rats. Conclusion SMSJC combined with methimazole plays a protective role on hyperthyroidism hepatic damage induced by L?thyroxine in rat. It is proposed that the effect is association with inhibiting hepatic oxidative stress.

Timing of Levothyroxine in the Treatment of Primary Hypothyroidism.

Aim: Timing of levothyroxine (L-thyroxine) administration seems beneficial for early obtaining thyroid state. The present study aimed at investigating the best time of L-thyroxine administration that can achieve earlier normalization of thyroid stimulating hormone (TSH) and free thyroxine (FT4) levels in patients with primary hypothyroidism. Study Design: Eighty two patients with primary hypothyroidism were recruited between November 2012 and July 2013 during their consultation to Al-Faiha Specialized Diabetes, Endocrine and Metabolism Center, Basrah, Iraq. The patients were divided into two equal groups; group A were receiving L-thyroxine daily, one hour before breakfast, group B: the dose of L-thyroxine was given at the evening. TSH, FT4, Body mass index (BMI), blood pressure, lipid profile were measured before, 30, 60 and 90 days after treatment with L-thyroxine. Results: The mean reduction in TSH from baseline for the evening treatment was 13.6±22.2 mIU/ml which was slightly and insignificantly higher than the value of the morning treatment (11.3±22.5 mIU/ml), P = .63, df = 80, 95% CI: -12.17, 7.5). The mean increase in FT4 from baseline for the evening treatment was 5.7±4.9 pmol/l which was lower than 7.6±6 pmol/l in the morning treatment, (P = .12, df = 80, 95% CI: - 0.5, 4.3). There was no effect of treatment timing on lipid profile, blood pressure, and BMI. Conclusions: There were no differences between the morning and evening treatment with L-thyroxine on early normalization of TSH and FT4.

Relationship of TSH with atherosclerosis-related factors in subclinical hypothyroidism / 中华内分泌代谢杂志

Two hundred and fifty patients with subclinical hypothyroidism ( SCH) and 120 euthyroid volunteers were recruited for the study, SCH patients were stratified into 2 groups according to TSH levels(group A:TSH10 mIU/ L). All subjects were examined for clinical characteristics, thyroid profile, lipid profile, and biomarkers of early atherosclerosis. Patients in group B received L-thyroxine replacement treatment to achieve euthyroidism. After 6 months of stable euthyroidism all measurements were repeated. SCH patients had higher levels of total cholesterol(TC), low-density lipoprotein-cholesterol(LDL-C), asymmetric dimethyl arginine (ADMA), carotid artery intima media thickness(CIMT), thromboxane B2(TXB2), and C-reactive protein(CRP) but with lower nitric oxide(NO) level compared with euthyroid subjects. Levels of TC, LDL-C, CIMT, TXB2, and ADMA decreased, and NO level increased significantly after 6 months of euthyroidism. TSH was positively correlated with TC, LDL-C, CIMT, ADMA, and TXB2; and negatively correlated with NO. Based on multivariate regression analysis, TSH was an independent influential factor of CIMT and NO. We conclude that raised TSH is an important risk factor of atherosclerosis in SCH.

Role and mechanism of L-thyroxine on brain tissue hypoxia-inducible factor 1α expression in neonatal rats with hypoxia-ischemia brain damage / 中华实用儿科临床杂志

Objective To observe the expression of hypoxia-inducible factor 1 α (HIF-1α) in rat brain after hypoxia-ischemia(HI),and to explore the possible mechanism of L-thyroxine (L-T4) on HIF-1α expression.Methods Sixty-four postnatal 7-day Sprague-Dawley rats were randomly divided into 4 groups:the sham operation group,HI group,menstruum-treated group and L-T4-treated group.HIBD models were generated according to Rice model method.The rats in menstruum-treated group and L-T4-treated group were respectively administrated of intraperitoneal injection of menstruum with the equal volume and 2 μg/100g L-T4,once a day,for 5 days.The expressions of HIF-1α and phospho-protein kinase B(p-Akt) protein were detected by means of immunohistochemistry.Reverse transcription-polymerase chain reaction was used to detect the level of HIF-1α mRNA.Results The levels of p-Akt protein(50.168 ±4.259),HIF-1α protein (72.795 ±6.121) and HIF-1α mRNA (0.448 ± 0.035) were upregulated compared with those in the sham operation group (8.080 ±0.369,38.581 ± 2.846,0.174 ± 0.015),and the differences were significant (all P ＜ 0.05).The levels of p-Akt protein (82.765 ± 6.271),HIF-1 α protein (117.350 ± 9.374) and HIF-1 α mRNA (0.618 ± 0.042) in L-T4-treated group were higher than those in HI group,and the differences were significant (all P ＜ 0.05).The level of HIF-1 α protein was positively correlated with p-Akt protein in HI group and L-T4-treated group [r(HI) =0.635,P=0.048;r(L-T4) =0.694,P=0.026].Conclusions L-T4 can upregulate HIF-1α mRNA and protein expression in neonatal rats with hypoxia-ischemia brain damage.Phosphatidylinositol-3-kinase/protein kinase B signaling pathway may be involved in L-T4 upregulating HIF-1α mRNA and protein expression.

Avaliação terapêutica e posológica da levotiroxina sódica em cães com hipotiroidismo primário adquirido / L-levothyroxine therapeutic dosage evaluation in dogs with primary hypothyroidism

O hipotireoidismo primário adquirido é uma endocrinopatia frequentemente diagnosticada na espécie canina. A terapia consiste na suplementação oral com levotiroxina sódica (L-tiroxina), no entanto vários protocolos terapêuticos têm sido propostos pela literatura, com doses variando 11 a 44µg/kg uma a duas vezes ao dia, visto à grande variabilidade de absorção e meia-vida plasmática do fármaco. Foram estudados 30 cães com hipotiroidismo primário adquirido (13 machos e 17 fêmeas, idade média de 7,9±1,9 anos e peso médio de 19,1±12,6 kg) atendidos no Hospital Veterinário da Universidade Guarulhos (UnG) e no Serviço de Endocrinologia de duas clínicas particulares da cidade de São Paulo (2009-2011), com o objetivo de avaliar a posologia e a frequência de administração da L-tiroxina, mais frequentemente utilizada, capaz de garantir um controle terapêutico satisfatório, avaliado através dos sinais clínicos e do teste pós-tiroxina, além de correlacionar a dose de tiroxina empregada com o peso dos animais. A dose média de tiroxina utilizada em nossa casuística foi de 16,9±3,1µg/kg, sendo a frequência de administração a cada 12 horas em 50% dos casos. Para se investigar uma possível correlação entre o peso e a dosagem de tiroxina utilizada, uma vez que cães de pequeno porte apresentam maior taxa metabólica que cães de grande porte, os animais foram agrupados em grupo A, cães com peso <10 Kg (n=12/30; 7,7±2,1 kg) e grupo B, cães com peso >10 kg (n=18/30, 26,8±10,7 kg). A dose média de tiroxina empregada nos grupos A e B não apresentaram diferença estatística e foram, respectivamente, 16±3µg/kg e 17±3µg/kg. A frequência de administração foi 50% a cada 24 horas e 50% a cada 12 horas para ambos os grupos. Dessa forma, a dose de tiroxina não parece se correlacionar com o peso do animal, sendo imprevisível quem deverá receber dose e frequência máxima da medicação. O protocolo deve ser individualizado e o paciente devidamente monitorado.

The acquired primary hypothyroidism is a frequently diagnosed endocrinopathy in dogs. The therapy constitutes in oral supplementation with sodium levothyroxine (L-thyroxine), however various therapeutic protocols have been proposed in the literature, with doses ranging from11 to 44mg/kg once or twice a day, since L-thyroxine has a great variability of absorption and plasma half life. We studied 30 dogs with primary hypothyroidism (13 males and 17 females, mean age 7.9±1.9 years and mean weight of 19.1±12.6 kg), in order to evaluate the dose and frequency of administration of L-thyroxine used more often able to secure a satisfactory therapeutic control as measured by clinical signs and test post-pill, and to correlate the amount of thyroxine employed with the animals' weight. The mean dose of thyroxine used in our study was 16.9±3.1mg/kg, and the frequency of administration every 12 hours in 50% of cases. To investigate a possible correlation between weight and dose of thyroxine used, since small dogs have a higher metabolic rate than large dogs, the animals were grouped in Group A, dogs weighing <10 kg (n=12/30, 7.7±2.1 kg) and group B, dogs weighing> 10 kg (n=18/30, 26.8±10.7 kg). The mean dose of thyroxine used in groups A and B did not differ significantly and were respectively 16±3mg/kg and 17±3mg/kg. The frequency of administration was 50% every 24 hours and 50% every 12 hours for both groups. Thus, the dose of thyroxine does not seem to correlate with the weight of the animal being unpredictable who should receive the highest dose and frequency of the medication. The protocol should be individualized and the patient adequately monitored.

Efeito da L-tiroxina sódica na tolerância ao esforço em mulheres com hipotireoidismo subclínico / Effect of l-thyroxine sodium on exercise tolerance in women with subclinical hypothyroidism

Introdução. Vários estudos associam o hipotireoidismo subclínico a fatores de risco de doença aterosclerótica. Poucos deles correlacionam esse distúrbio à diminuição da tolerância ao esforço físico. Nesse contexto, a reposição hormonal com o emprego da L-tiroxina no tratamento desses doentes permanece controvertido. Objetivo. Analisar o efeito da L-tiroxina sódica na tolerância ao esforço físico em mulheres com hipotireoidismo subclínico. Método. Foram selecionadas sete mulheres com idade de 40 a 60 anos, TSH acima de 4,4 mU/L, T3 livre e T4 normais no plasma sem sinais clínicos de hipotireoidismo. Para avaliação da tolerância ao esforço foram submetidas a teste de esforço progressivo. Como parâmetro de esforço foi analisada a concentração de lactato sanguíneo nos períodos pré e pós-tratamento. Resultados. Houve melhora significativa na tolerância ao lactato e, consequentemente, na tolerância ao esforço após tratamento com L-tiroxina. Conclusão. A terapia de reposição hormonal com L-tiroxina sódica em portadoras de hipotireoidismo subclínico pode propiciar maior tolerância ao esforço físico progressivo.

Introduction. Several studies have associated subclinical hypothyroidism with risk factors for atherosclerotic disease, but its correlation with a decreased tolerance to the physical effort has been scarcely studied. In this context, the hormonal replacement with L-thyroxine for the treatment of these patients remains controversial. Objective. To analyze the effect of sodium L-thyroxine on the tolerance to the physical effort of patients with subclinical hypothyroidism. Method. Seven female volunteers aged from 40 to 60 years, without clinical signs of hypothyroidism, but with TSH above 4.4 mU/dL, and normal total T3 and free T4 in the plasma were selected. For the evaluation of tolerance to the physical effort, all patients were submitted to a progressive effort test. Levels of blood lactate before and after treatment were analyzed as parameters of effort.Results. There was a significant improvement in tolerance to the lactate and consequently, in tolerance to the effort after treatment with thyroxine.Conclusion. The hormone replacement therapy with L-thyroxine sodium in women with subclinical ?hypothyroidism may improve progressive exercise tolerance.

Effect of thyroxine therapy on autonomic status in hypothyroid patients.

The aim of the present study was to evaluate the impact of hypothyroidism on the autonomic regulation of the cardiovascular system by analyzing sympathetic and parasympathetic influences on the heart and the effect of thyroxine replacement. Thirty newly diagnosed female hypothyroid patients with mean age 32.73±9.98 years were recruited from the Thyroid Clinic, GTB Hospital, Delhi. Various Autonomic function tests to assess Basal heart rate variability, parasympathetic activity (E:I Ratio, 30:15 Ratio, Valsalva Ratio) and sympathetic activity (Postural Challenge test, Sustained handgrip test) were done before and after attainment of euthyroidism. There was significant increase in parasympathetic activity on achieving euthyroid state. The sympathetic activity too significantly improved after L-thyroxine supplementation. Lipid profile parameters significantly decreased after achieving euthyroid state. Our findings are consistent with previous reports that thyroxine therapy appears to restore the efferent vagal activity and alters the relative contribution of systems that maintain resting blood pressure and heart rate.

The effect of the combination therapy with antithyroid drug and thyroxine in Graves' disease / 대한내과학회지

OBJECTIVES: It was recently reported that the administration of T4 during antithyroid drug(ATD) therapy resulted in a significant decrease of antibodies to TSH receptors as well as the rate of recurrence of active Graves' disease following discontinuance of ATD treatment. But, there is still controversy whether combination therapy is efficient. Therefore, the present study was undertaken to evaluate the effect of T4 administration of patient with Graves' disease who were being treated with ATD. METHODS: We studied 56 patients received methimazole(MMI) alone(Group 1) and 48 patients received methimazole plus T4(Group 2), They are diagnosed active Graves' disease at department of internal medicine, Kwang ju Christian Hospital from January, 1994 to December, 1995. All the patients were treated initially with 30mg of methimazole daily for one month after then, in the Group 1(methimazole alone), the dose of methimazole was adjusted as necessary to achieve normal serum concentrations of T3, T4, and TSH. The patients of Group 2(methimazole plus T4) continue to receive the combination of T4 at a dose of 100 microgram daily. Simultaneously, we estimated the serum concentration of T3, T4, TSH and Thyroid-stimulating immunoglobulin(TSI) antibody at every three months. RESULTS: We obtained the following result. In the group 1, mean TSI values were 50.1%(first visit), 30.6%(6months), and 24.7%(1year). And, in the group 2 mean TSI values were 51.8%(first visit), 33.6%(6months), and 22.7% (1year). After 6 months of discontinuing of therapy, the recurrence rate was no significant difference in the two groups (the recurrence rate were 55.4%, 50.0%, respectively P>0.05). CONCLUSION: These results suggest that T4 administration in combination with MMI therapy have no significant effect in a decrease in levels of TSH receptors antibodies and recurrence rate within 6 months discontinuing MMI therapy as compared with MMI treatment alone.

Effect of aqueous extract from Semen Lepidii seu Descurainiae on ventricular remodeling in experimental animals / 中草药

Objective To evaluate the effects of aqueous extract from Semen Lepidii seu Descurainiae(SLD) on myocardial hypertrophy induced by isoprenaline(ISO) and L-thyroxine(L-Thy) in experimental mice and rats.Methods The myocardial hypertrophy models of mice were prepared by daily sc ISO 2 mg/kg for 7 d and of rats by daily ip L-Thy 0.3 mg/kg for 10 d.The mice were given aqueous extract from SLD 6 and 12 g/kg or Metoprolol 0.06 g/kg by ig administration once a day for 7 d,then the changes of cardiac indexes,plasma concentration of cAMP,and angiontensin Ⅱ(AngⅡ) content in myocardium were measured.The rats were given the aqueous extract from SLD 4 and 8 g/kg or Captopril 0.02 g/kg once a day for 10 d,then the changes of cardiac indexes,plasma concentration of ALD,AngⅡ content in left ventricle,and hydroxproline(Hyp) level were measured.Results Compared with the normal mice,cardiac indexs,plasma concentration of cAMP,and Ang Ⅱ content were remarkably increased in the model group(P

Nutritional Evaluation in Blood Chemical Test. Effects on Free Thyroxine Index of Iodine Through. Wakame Seaweed / 日本農村医学会雑誌

In this study, the effects of excessive iodine intake on free thyroixine index (FTI) were studied, and the results are presented in the following.<BR>FTI tended to decrease during the basal diet period without wakame seaweed and the decrease tended to continue further during the periods of TEST 1 (wakame seweed 10g/day) and TEST 2 (wakame seaweed 20g/day). The trend changed in the period of TEST 3 (wakame seaweed 40g/day), and FTI rose slightly. When the basal diet was resumed after completion of experimental diets, the level returned to the base line levels measured before the beginning of the experiment.