51
|
Lee S, Ishibashi S, Shimomura Y, Katsuura T. Physiological functions of the effects of the different bathing method on recovery from local muscle fatigue. J Physiol Anthropol 2012; 31:26. [PMID: 22980588 PMCID: PMC3576248 DOI: 10.1186/1880-6805-31-26] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Accepted: 09/04/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Recently, mist saunas have been used in the home as a new bathing style in Japan. However, there are still few reports on the effects of bathing methods on recovery from muscle fatigue. Furthermore, the effect of mist sauna bathing on human physiological function has not yet been revealed. Therefore, we measured the physiological effects of bathing methods including the mist sauna on recovery from muscle fatigue. METHODS The bathing methods studied included four conditions: full immersion bath, shower, mist sauna, and no bathing as a control. Ten men participated in this study. The participants completed four consecutive sessions: a 30-min rest period, a 10-min all out elbow flexion task period, a 10-min bathing period, and a 10-min recovery period. We evaluated the mean power frequency (MNF) of the electromyogram (EMG), rectal temperature (Tre), skin temperature (Tsk), skin blood flow (SBF), concentration of oxygenated hemoglobin (O2Hb), and subjective evaluation. RESULTS We found that the MNF under the full immersion bath condition was significantly higher than those under the other conditions. Furthermore, Tre, SBF, and O2Hb under the full immersion bath condition were significantly higher than under the other conditions. CONCLUSIONS Following the results for the full immersion bath condition, the SBF and O2Hb of the mist sauna condition were significantly higher than those for the shower and no bathing conditions. These results suggest that full immersion bath and mist sauna are effective in facilitating recovery from muscle fatigue.
Collapse
|
52
|
Katsuura T, Ochiai Y, Senoo T, Lee S, Takahashi Y, Shimomura Y. Effects of blue pulsed light on human physiological functions and subjective evaluation. J Physiol Anthropol 2012; 31:23. [PMID: 22943428 PMCID: PMC3443645 DOI: 10.1186/1880-6805-31-23] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Accepted: 08/17/2012] [Indexed: 11/24/2022] Open
Abstract
Background It has been assumed that light with a higher irradiance of pulsed blue light has a much greater influence than that of light with a lower irradiance of steady blue light, although they have the same multiplication value of irradiance and duration. We examined the non-visual physiological effects of blue pulsed light, and determined whether it is sensed visually as being blue. Findings Seven young male volunteers participated in the study. We placed a circular screen (diameter 500 mm) in front of the participants and irradiated it using blue and/or white light-emitting diodes (LEDs), and we used halogen lamps as a standard illuminant. We applied three steady light conditions of white LED (F0), blue LED + white LED (F10), and blue LED (F100), and a blue pulsed light condition of a 100-μs pulse width with a 10% duty ratio (P10). The irradiance of all four conditions at the participant's eye level was almost the same, at around 12 μW/cm2. We measured their pupil diameter, recorded electroencephalogram readings and Kwansei Gakuin Sleepiness Scale score, and collected subjective evaluations. The subjective bluish score under the F100 condition was significantly higher than those under other conditions. Even under the P10 condition with a 10% duty ratio of blue pulsed light and the F10 condition, the participant did not perceive the light as bluish. Pupillary light response under the P10 pulsed light condition was significantly greater than under the F10 condition, even though the two conditions had equal blue light components. Conclusions The pupil constricted under the blue pulsed light condition, indicating a non-visual effect of the lighting, even though the participants did not perceive the light as bluish.
Collapse
|
53
|
Farooq M, Kurban M, Abbas O, Obeidat O, Fujikawa H, Kibbi AG, Fujimoto A, Shimomura Y. A novel mutation in thePLCD1gene, which leads to an aberrant splicing event, underlies autosomal recessive leuconychia. Br J Dermatol 2012; 167:946-9. [DOI: 10.1111/j.1365-2133.2012.10962.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
54
|
Kurban M, Wajid M, Shimomura Y, Christiano AM. Mutations in LPAR6/P2RY5 and LIPH are associated with woolly hair and/or hypotrichosis. J Eur Acad Dermatol Venereol 2012; 27:545-9. [PMID: 22385360 DOI: 10.1111/j.1468-3083.2012.04472.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND Woolly hair (WH) belongs to a family of disorders characterized by hair shaft anomalies that clinically presents with tightly curled hair, which can be divided into syndromic and non-syndromic forms of WH. We have recently identified mutations in both LPAR6/P2RY5 and LIPH that are associated with autosomal recessive woolly hair (ARWH). OBJECTIVE To study the underlying genetic causes of autosomal woolly hair in Pakistani population. METHODS We studied 10 Pakistani families with ARWH for mutations in LPAR6/P2RY5 and LIPH and then performed haplotype analysis to confirm their segregation in the families. RESULTS We identified five mutations in LPAR6/P2RY5, among which three were recurrent and two were novel in eight Pakistani families. We then showed that two of the mutations in LPAR6/P2RY5 are founder mutations in Pakistani families. Moreover, we identified two recurrent mutations in the LIPH gene in two Pakistani families. CONCLUSION Our study extends the spectrum of mutations in LPAR6/P2RY5 gene and underscores those mutations in LPAR6/P2RY5 and LIPH result in similar phenotypes.
Collapse
|
55
|
Nishida O, Yumoto M, Moriyama K, Shimomura Y, Miyasho T, Yamada S. Possible adsorption mechanism of high mobility group box 1 protein on a polyacrylonitrile (AN69ST) membrane filter. Crit Care 2012. [PMCID: PMC3363797 DOI: 10.1186/cc10986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
56
|
Huang JS, Shimomura Y, Katsuura T. Effects of Monochromatic Light on Different Time Perception. ACTA ACUST UNITED AC 2012. [DOI: 10.1618/jhes.15.21] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
57
|
Igarashi T, Shimomura Y, Yamaguchi T, Kawahira H, Makino H, Yu WW, Naya Y. Water-filled laparoendoscopic surgery (WAFLES): feasibility study in porcine model. J Laparoendosc Adv Surg Tech A 2011; 22:70-5. [PMID: 22145608 DOI: 10.1089/lap.2011.0404] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
PURPOSE Recent surgical techniques have been advancing under endoscopic view and insufflation of carbon dioxide gas to expand the abdominal cavity. Isotonic fluid could be one candidate for expanding cavities to facilitate surgical maneuvering. We tested the feasibility and drawbacks of replacement of irrigating materials using a porcine model (water-filled laparoendoscopic surgery [WAFLES]). MATERIALS AND METHODS Laparoscopic cholecystectomy was performed in two porcine models using instillation of sorbitol solution as irrigant. Solution irrigation was performed through one of four ports, with drainage via another port. Conventional forceps equipped with a monopolar electrode for electrocautery, laparoscope, video processor, ultrasound, and transducer for measuring intraabdominal pressure were used. RESULTS Laparoscopic cholecystectomy was successfully undertaken with the following benefits: (1) clear observation of the dissecting plane throughout maneuvering; (2) control of oozing and spilled bile by irrigation and suction; and (3) ultrasonographic and laparoscopic images can be obtained simultaneously without any restriction to probe location. However, two disadvantages should be noted: (1) difficulties in managing floating organs and (2) interruption of vision by blood. CONCLUSIONS WAFLES provides some benefits for endoscopic surgery with proper devices, including apparatuses for irrigation and suction. Efficient irrigation and selection of proper irrigant and apparatuses are required to establish an acceptable procedure.
Collapse
|
58
|
Farooq M, Ito M, Naito M, Shimomura Y. A case of monilethrix caused by novel compound heterozygous mutations in the desmoglein 4 (DSG4) gene. Br J Dermatol 2011; 165:425-31. [DOI: 10.1111/j.1365-2133.2011.10373.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
59
|
Nakajima K, Nakano T, Tokita Y, Nagamine T, Yatsuzuka S, Shimomura Y, Tanaka A. 92 THE PRESENCE OF REMNANT LIPOPROTEINS IN THE FASTING PLASMA WITH TG LEVELS LESS THAN 150 MG/DL. ATHEROSCLEROSIS SUPP 2011. [DOI: 10.1016/s1567-5688(11)70093-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
60
|
Nishida O, Nakamura T, Kuriyama N, Hara Y, Moriyama K, Yumoto M, Shimomura Y. Sustained high-efficiency daily diafiltration using a cytokine-adsorbing membrane in the treatment of patients with severe sepsis. Crit Care 2011. [PMCID: PMC3061745 DOI: 10.1186/cc9535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
61
|
Yumoto M, Nishida O, Moriyama K, Shimomura Y, Nakamura T, Kuriyama N, Hara Y, Yamada S, Miyasho T. In vitro evaluation of HMGB1 removal with various membranes for continuous hemofiltration. Crit Care 2011. [PMCID: PMC3061744 DOI: 10.1186/cc9534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
62
|
Lee S, Katsuura T, Shimomura Y. Effects of parametric speaker sound on physiological functions during mental task. J Physiol Anthropol 2011; 30:9-14. [PMID: 21307615 DOI: 10.2114/jpa2.30.9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
In recent years, parametric speakers have been used in various circumstances. However, nothing has yet been demonstrated about the safety of parametric speakers for the human body. Therefore, we studied their effects on physiological functions. Nine male subjects participated in this study. They completed three consecutive sessions: a 20-min quiet period as a baseline, a 45-min mental task period with a general speaker or a parametric speaker, and a 20-min recovery period. We measured electrocardiogram (ECG), photoplethysmogram (PTG), electroencephalogram (EEG), blood pressure (BP), and baroreflex sensitivity (BRS). Two experiments, one with a general speaker (the general condition), the other with a parametric speaker (the parametric condition), were conducted at the same time of day on separate days. To examine the effects of the parametric speaker, a two-way repeated measures ANOVA (speaker factor and time factor) was conducted. We found that sympathetic nervous activity and second derivative of PTG in task period and recovery period during the parametric condition were significantly lower than those indications during the general condition. Furthermore, Δ parasympathetic nervous activity during the parametric condition in task period and recovery period tended to be smaller than that during the general condition. The results suggested that the burden of the parametric speaker is lower than that of the general speaker for physiological functions, especially those of the cardiovascular system. Furthermore, we verified that the reaction time with the parametric speaker is shorter than that with the general speaker.
Collapse
|
63
|
Lee HR, Kanezashi M, Shimomura Y, Yoshioka T, Tsuru T. Evaluation and fabrication of pore-size-tuned silica membranes with tetraethoxydimethyl disiloxane for gas separation. AIChE J 2011. [DOI: 10.1002/aic.12501] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
64
|
Lee S, Katsuura T, Shimomura Y. Verification of endocrinological functions at a short distance between parametric speakers and the human body. NEURO ENDOCRINOLOGY LETTERS 2011; 32:676-682. [PMID: 22167151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Accepted: 08/01/2011] [Indexed: 05/31/2023]
Abstract
OBJECTIVE In recent years, a new type of speaker called the parametric speaker has been used to generate highly directional sound, and these speakers are now commercially available. In our previous study, we verified that the burden of the parametric speaker was lower than that of the general speaker for endocrine functions. However, nothing has yet been demonstrated about the effects of the shorter distance than 2.6 m between parametric speakers and the human body. Therefore, we investigated the distance effect on endocrinological function and subjective evaluation. METHODS Nine male subjects participated in this study. They completed three consecutive sessions: a 20-min quiet period as a baseline, a 30-min mental task period with general speakers or parametric speakers, and a 20-min recovery period. We measured salivary cortisol and chromogranin A (CgA) concentrations. Furthermore, subjects took the Kwansei-gakuin Sleepiness Scale (KSS) test before and after the task and also a sound quality evaluation test after it. Four experiments, one with a speaker condition (general speaker and parametric speaker), the other with a distance condition (0.3 m and 1.0 m), were conducted, respectively, at the same time of day on separate days. We used three-way repeated measures ANOVA (speaker factor × distance factor × time factor) to examine the effects of the parametric speaker. RESULTS We found that the endocrinological functions were not significantly different between the speaker condition and the distance condition. CONCLUSION The results also showed that the physiological burdens increased with progress in time independent of the speaker condition and distance condition.
Collapse
|
65
|
Shimomura Y, Wajid M, Kurban M, Christiano AM. Splice site mutations in the P-cadherin gene underlie hypotrichosis with juvenile macular dystrophy. Dermatology 2010; 220:208-12. [PMID: 20203473 DOI: 10.1159/000275673] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Accepted: 12/24/2009] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Hypotrichosis with juvenile macular dystrophy (HJMD; OMIM 601553) is a rare autosomal recessive disorder characterized by hypotrichosis with short scalp hair and progressive macular dystrophy leading to blindness between the second and the fourth decades of life. HJMD is caused by mutations in the P-cadherin gene (CDH3), a member of the family of classical cadherins. METHODS We analyzed the DNA from members of 2 consanguineous Pakistani families with HJMD for mutations in the P-cadherin gene through direct sequencing. RESULTS We identified 2 splice site mutations in the P-cadherin gene in these families. One was a novel mutation, Ivs12-2A-->G and the other a recurrent mutation, Ivs10-1G-->T. A screening assay for the novel mutation ruled out the possibility of a polymorphism. Using haplotype analysis, we determined that the mutation, Ivs10-1G-->T, is a founder mutation in the Pakistani population. CONCLUSION We identified 2 splice site mutations in the CDH3 gene leading to HJMD, further enriching our understanding of HJMD versus ectodermal dysplasia, ectrodactyly and macular dystrophy syndrome.
Collapse
|
66
|
Kurban M, Cheng T, Wajid M, Kiuru M, Shimomura Y, Christiano AM. A novel mutation in the cathepsin C gene in a Pakistani family with Papillon-Lefevre syndrome. J Eur Acad Dermatol Venereol 2010; 24:967-9. [PMID: 20236208 DOI: 10.1111/j.1468-3083.2010.03575.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Papillon-Lefevre syndrome (PLS; OMlM 245000) is an autosomal recessive disease caused by mutations in cathepsin C (CTSC) gene and is characterized by palmoplantar keratoderma, psoriasiform lesion over the extensor surfaces and gingivitis followed by loss of teeth. CTSC gene is expressed in several tissues including the skin and cells of the immune system. In the skin, CTSC plays a role in differentiation and desquamation, whereas in the immune system, it activates serine proteases. OBJECTIVES We analysed the molecular basis of PLS in a Pakistani family. METHODS Genomic DNA was isolated from the sample according to standard techniques. All exons of the CTSC gene with adjacent sequences of exon-intron borders were amplified by PCR and directly sequenced. RESULTS We identified a novel deletion mutation designated c.2ldelG (Leu7PhefsX57) in exon 1 of the CTSC gene, which probably results in the absence of CTSC protein. CONCLUSION Our data further expand the spectrum of mutations in the CTSC gene underlying PLS.
Collapse
|
67
|
Liu X, Iwanaga K, Shimomura Y, Katsuura T. The Reproducibility of Cardiovascular Response to a Mental Task. J Physiol Anthropol 2010; 29:35-41. [DOI: 10.2114/jpa2.29.35] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
|
68
|
Lee S, Katsuura T, Towatari-Ueno T, Shimomura Y. The effects of parametric speaker sound on salivary hormones and a subjective evaluation. NEURO ENDOCRINOLOGY LETTERS 2010; 31:524-529. [PMID: 20802441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/26/2010] [Accepted: 07/27/2010] [Indexed: 05/29/2023]
Abstract
OBJECTIVE Recently, a parametric speaker system has been developed. However, the safety of the parametric speaker for the human body has not yet been demonstrated. Therefore, we studied the effects of parametric speaker sound on salivary hormones and carried out a subjective evaluation. METHODS Nine male subjects participated in this study. They completed three consecutive sessions: a 20-min quiet period as a baseline, a 45-min mental task period with either a general or parametric speaker, and a 20-min recovery period. The subjects were evaluated by the salivary cortisol and chromogranin A (CgA) concentrations. In addition, they took the Kwansei-Gakuin sleepiness scale (KSS) test before and after the task and also a sound quality evaluation test after it. Two experiments, one with a general speaker (general condition) and the other with a parametric speaker (parametric condition), were conducted at the same time of day on separate days. To examine the effects of the parametric speaker, a two-way repeated measures ANOVA (speaker factor and time factor) was conducted. RESULTS The results showed that the cortisol concentration was significantly lower during the parametric condition than during the general condition. Furthermore, the sound quality evaluation found a "warm" sensation during the parametric condition to be lower than that during the general condition. A "noisy" sensation during the parametric condition tended to be higher than during the general speaker. However, the CgA concentration and the KSS score were not significantly different for either the speaker factor or the time factor. CONCLUSION The results suggested that the burden of the parametric speaker was smaller than that of general speaker, especially on the HPA-axis in the endocrine system.
Collapse
|
69
|
Shimomura Y, Wajid M, Weiser J, Kraemer L, Christiano AM. Mutations in the keratin 9 gene in Pakistani families with epidermolytic palmoplantar keratoderma. Clin Exp Dermatol 2009; 35:759-64. [PMID: 19874353 DOI: 10.1111/j.1365-2230.2009.03700.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Keratins are heteropolymeric proteins that form the intermediate filament cytoskeleton in epithelial cells. The common basic structure of all keratins is organized in a central α-helical rod domain flanked by nonhelical, variable head and tail regions. Most mutations in keratins are found in the central α-helical rod domain. Keratin 9 (K9) is expressed only in the suprabasal layers of palmoplantar epidermis. Mutations in the keratin 9 gene (KRT9) have been shown to cause epidermolytic palmoplantar keratoderma (EPPK; OMIM 144200), an autosomal dominant genodermatosis characterized clinically by diffuse hyperkeratosis limited to the palms and soles, and histologically by epidermolysis in suprabasal layers of the epidermis. AIM To elucidate the genetic basis of EPPK in five Pakistani families. METHODS Using microsatellite markers localized to the areas around the type I keratin gene cluster on chromosome 17q21, genotyping of these families was performed, followed by sequencing of the KRT9 gene. RESULTS The analysis resulted in the identification of two novel (p.M157K and p.Y454H) and two recurrent (p.M157T and p.R163Q) mutations in the KRT9 of all five families. All mutations occurred within the highly conserved helix initiation or termination motif of K9. CONCLUSIONS The affected members of all five families possess mutations in the KRT9 gene that severely affect heterodimer formation with the type II keratin partner. The results of our study further underscore the crucial role of K9 protein in the palmoplantar epidermis.
Collapse
|
70
|
Wajid M, Ishii Y, Kurban M, Dua-Awereh MB, Shimomura Y, Christiano AM. Polyalamine repeat expansion mutations in theHOXD13gene in Pakistani families with synpolydactyly. Clin Genet 2009; 76:300-2. [DOI: 10.1111/j.1399-0004.2009.01213.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
71
|
Kurban M, Shimomura Y, Bahhady R, Ghosn S, Kibbi AG, Christiano AM. Nonsense mutation in the ALOX12B gene leads to autosomal recessive congenital ichthyosis in a Lebanese family. J Eur Acad Dermatol Venereol 2009; 24:232-4. [PMID: 19694890 DOI: 10.1111/j.1468-3083.2009.03381.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
72
|
Sato N, Shimizu H, Shimomura Y, Uehara Y, Takahashi M, Negishi M. Sucrose feeding at weaning alters the preference for sucrose in adolescence. EXPERIMENTAL AND CLINICAL ENDOCRINOLOGY 2009; 98:201-6. [PMID: 1778239 DOI: 10.1055/s-0029-1211118] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The present studies were undertaken to examine the hypothesis that sucrose feeding at weaning may alter the preference for sucrose in the adolescence. Chronological changes of hypothalamic dopamine (DA), its metabolite, 3,4-dihydroxy-phenylacetic acid (DOPAC) and norepinephrine (NE) contents were also measured by HPLC. In 21 day-aged rats, 10% sucrose or water was given as drinking water for 3 weeks. From 9 weeks, all animals were maintained under a free choice between 30% sucrose solution and water. Sucrose-ingested rats more preferred to 30% sucrose solution than control rats and body weight gain of sucrose group was significantly greater than that of controls. Hypothalamic DA content was significantly decreased at 6 and 13 weeks and the DOPAC/DA ratio increased at 3, 6, and 13 weeks later. In contrast, hypothalamic NE concentration was not changed at all. The data obtained herein suggest that sucrose feeding at weaning alters the preference for sucrose, resulting in an overweight gain, and that the observed increase of hypothalamic DA metabolism may be involved in the altered preference for sucrose.
Collapse
|
73
|
Sato N, Shimizu H, Shimomura Y, Uehara Y, Takahashi M, Kobayashi I. Reduced ability of neutrophils to produce active oxygen species in streptozotocin-induced diabetic rats. EXPERIMENTAL AND CLINICAL ENDOCRINOLOGY 2009; 99:31-3. [PMID: 1385786 DOI: 10.1055/s-0029-1211128] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We investigated a possible alteration in the ability of neutrophils to produce active oxygen species in streptozotocin (STZ)-induced diabetic rats. The production of superoxide of the neutrophils was assessed by luminol-dependent chemiluminescence (LDCL) after the stimulation by opsonized zymosan. Four days after STZ (60 mg/kg, ip) injection, blood glucose level increased by 399 +/- 9 mg/dl and the LDCL activity was significantly reduced in diabetic rats (control group: 5.12 +/- 1.53 KC/min2/10(6) cells, STZ group: 1.10 +/- 0.07 KC/min2/10(6) cells, p less than 0.01). At Day 17, blood glucose level was maintained high (598 +/- 8 mg/dl) and the LDCL activity (1.01 +/- 0.39 KC/min2/10(6) cells) was almost at the same level as that of diabetic rats at Day 4. Subcutaneous injection of insulin for 10 consecutive days increased the LDCL activity of diabetic rats in a dose-dependent manner (vehicle: 0.82 +/- 0.27 KC/min2/10(6) cells, 0.04 U/day: 1.61 +/- 0.09 KC/min2/10(6) cells, 0.40 U/day: 1.99 +/- 0.47 KC/min2/10(6) cells, 4.00 U/day: 3.33 +/- 0.43 KC/min2/10(6) cells). The data obtained herein indicate that an increased susceptibility to bacterial infection in diabetic rats results from impaired neutrophil function to produce active oxygen species.
Collapse
|
74
|
Shimizu H, Shimomura Y, Sato N, Uehara Y, Kobayashi I. Colonic temperature was not changed in the development of obesity after ovariectomy. EXPERIMENTAL AND CLINICAL ENDOCRINOLOGY 2009; 99:99-101. [PMID: 1639127 DOI: 10.1055/s-0029-1211145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We tested the hypothesis that altered heat production ability after ovariectomy may be involved in the development of obesity. Two weeks after ovariectomy, food intake of ovariectomized (Ovx) rats was increased and body weight gain was obvious, compared with sham-operated animals. However, colonic temperature of Ovx rats was not different from that of sham-operated animals. Food intake of Ovx rats was similar with that of sham-operated rats at 8 weeks later. In this period, colonic temperature of Ovx rats was not different from that of sham-operated animals and diurnal rhythmicity was maintained. The present data suggested that changes in heat production may be not an important inducer of obesity in both the dynamic and static phases of the development of obesity after ovariectomy.
Collapse
|
75
|
Shimizu H, Sato N, Uehara Y, Shimomura Y. Hypothermia in insulin-treated obese rats. EXPERIMENTAL AND CLINICAL ENDOCRINOLOGY 2009; 99:96-8. [PMID: 1639126 DOI: 10.1055/s-0029-1211144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Changes of colonic temperature were investigated to examine a mechanism of hypothermia in the obese rats which received subcutaneous administration of intermediate type-insulin (8 U/day) for 8 weeks. Although diurnal rhythmicity of colonic temperature levels was maintained similarly with those of vehicle-injected controls, the overall colonic temperature levels were significantly lowered in insulin-treated animals. In the condition of cold exposure at 5 degrees C, colonic temperature levels of insulin-treated animals were immediately and significantly decreased at 60 minutes after the start of cold exposure. The data obtained herein demonstrated that hyperinsulinemia accompanying with hyperphagia should be profoundly involved in hypothermia, observed in various experimental models of obesity.
Collapse
|