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Sasaki Y, Muranaka T, Kawamoto Y, Sawada K, Nakatsumi H, Harada K, Miyagishima T, Hatanaka K, Dazai M, Ueda A, Sasaki T, Shinada K, Tsuji Y, Yuki S, Sakamoto N, Nishimoto N, Sakata Y, Komatsu Y. Multi-centered phase II trial of weekly 5-FU plus l-LV regimen as salvage line chemotherapy for oral fluorouracil resistant advanced gastric cancer (HGCSG1502). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz422.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Honda T, Nakano S, Yuki S, Sawada K, Muranaka T, Kawamoto Y, Nakatsumi H, Yoshita H, Ando T, Harada K, Kobayashi Y, Miyagishima T, Hatanaka K, Tanimoto A, Ishiguro A, Dazai M, Sasaki T, Komatsu Y. A retrospective multicenter study evaluating the efficacy and safety of irinotecan in patients with advanced gastric cancer: Analysis of Glasgow Prognostic Score (GPS). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz422.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Sasaki T, Kawabata S, Hoshino Y, Sekihara K, Akaza M, Ozaki I, Adachi Y, Hasegawa Y, Sato S, Watanabe T, Okawa A. Visualization of electrophysiological activity in patients with carpal tunnel syndrome using magnetoneurography. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sumiya S, Kawabata S, Ushio S, Sasaki T, Hashimoto J, Hoshino Y, Sekihara K, Watanabe T, Adachi Y, Okawa A. Visualization of electrophysiological activity in the cervical spinal cord using magnetospinography. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yanai T, Yasukawa H, Mawatari K, Sasaki T, Takahashi J, Nohara S, Shimozono K, Shibata T, Okabe K, Yamamoto M, Fukumoto Y. P1627Increased pericardial fibrosis and cardiac dysfunction in smooth muscle cell-specific SOCS3 deficient mice. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Suppressor of cytokine signaling-3 (SOCS3) is an intrinsic negative-feedback regulator of signal transducer and activator of transcription-3 (STAT3) signaling pathway. We have previously shown that myocardial SOCS3 plays an important role in cardiac hypertrophy and survival; however, the role of SOCS3 in smooth muscle cells in cardiovascular pathophysiology remains elusive. In this study, we determined whether STAT3 and SOCS3 in smooth muscle cells would play a role in cardiovascular pathophysiology.
Methods and results
To target inactivation of the SOCS3 gene to smooth muscle cells, SOCS3-flox mice were bred with transgenic mice expressing Cre recombinase under control of the mouse SM22-α promoter (sm-SOCS3-KO mice). Left ventricular weight to body weight ratio was significantly increased in sm-SOCS3-KO mice compared with wild-type mice at 52 weeks of age (p<0.05). Echocardiographic analyses of sm-SOCS3-KOmice showed significantly decreased cardiac function compared with wild-typefrom 52 weeks of age (p<0.05). Interestingly, Sirius-red staining revealed that thickness of pericardium in sm-SOCS3-KOmice was markedly greater compared with wild-typemice at 52 weeks of age (p<0.05). Cardiac interstitial fibrosis in sm-SOCS3-KOmice was also greater compared with wild-typemice (p<0.05). Western blot analyses showed that phosphorylated STAT3 was significantly increased in sm-SOCS3-KOhearts compared with wild-typemice at 52 weeks of age (p<0.05), whereas no significant differences were observed at 7 weeks of age. Immunostaining revealed that phosphorylated STAT3 positive cells were in thickened pericardial area in sm-SOCS3-KOhearts. Some infiltrated inflammatory cells were also found in thickened pericardial area in sm-SOCS3-KOmice hearts.
Conclusion
These results suggest that STAT3 and its negative-feedback regulator SOCS3 in smooth muscle cells play an important role in the pathogenesis of pericardial fibrosis and cardiac dysfunction.
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Kaminaka S, Akaza M, Kawabata S, Watanabe T, Miyano Y, Iida S, Sasaki T, Adachi Y, Sekihara K, Kanouchi T, Sumi Y, Okawa A, Yokota T. Diagnosis of C8 radiculopathy by magnetospinogram. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sumiya S, Kawabata S, Ushio S, Sasaki T, Hashimoto J, Yoshii T, Okawa A. Cervical spinal cord injury associated with neck flexion in posterior cervical decompression -Verification by intraoperative spinal cord monitoring. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Watanabe T, Kawabata S, Hoshino Y, Sasaki T, Ushio S, Akaza M, Miyano Y, Ozaki I, Adachi Y, Sekihara K, Okawa A. Visualization of nerve activities along the brachial plexus after median/ulnar nerve stimulation using magnetoneurography system. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kawabata S, Sasaki T, Hoshino Y, Sekihara K, Adachi Y, Watanabe T, Miyano Y, Okawa A. Diagnosis of conduction block in cervical myelopathy patients by non-invasive magnetospinography. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kimu S, Kawabata S, Akaza M, Sekihara K, Hoshino Y, Sasaki T, Watanabe T, Miyano Y, Sato S, Mitani Y, Yamaga T, Adachi Y, Okawa A. Visualization of neural activities in lumbar spine in response to the sciatic nerve stimulation by magnetoneurography. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Yamauchi T, Sasaki T, Yoshikawa T, Matsumoto S, Takahashi M. Incidence of overwork-related mental disorders and suicide in Japan. Occup Med (Lond) 2019; 68:370-377. [PMID: 29897506 DOI: 10.1093/occmed/kqy080] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Background Mental disorders and suicide resulting from overwork or work-related stress have become major occupational health issues worldwide, particularly in Asian countries. However, no studies have reported incidence rates of mental disorders and suicide by sex, age group and industry, using a national database containing all cases involving compensation in Asian countries. Aims The present study examined incidence rates of occupational mental disorders and suicide by sex, age group and industry using a database containing all cases involving compensation for mental disorders and suicide in Japan over a 5-year period. Methods Cases involving compensation for mental disorders and suicide in Japan between January 2010 and March 2015 were analysed. Incidence rates over the 5-year study period were calculated by sex, age group and industry. Results In total, 1990 cases involving compensation for mental disorders and suicide (619 women and 1371 men) between January 2010 and March 2015 were analysed. The incidence rate involving compensation was higher in employees aged between 30 and 39 years. In men, incidence rates were higher in 'accommodation/eating/drinking services', 'information/communication' and 'scientific research, professional and technical services'. In these industries, incidence rates were particularly high for those aged 29 years or younger. Conclusions Our findings highlight the importance of promoting mental health support for younger employees and increasing awareness of their working conditions. Differences in incidence rates by sex, age and industry should be taken into consideration in the development of a national policy and industry- and age-specific preventive measures for overwork-related mental disorders and suicide.
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Ito Y, Sasaki T, Kawakami E, Suda W, Atarashi K, Amagai M, Honda K. 336 Mutualistic skin bacteria protect against dermatitis via the induction of steroid biosynthesis pathways. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Gallegos MI, Jacobvitz DB, Sasaki T, Hazen NL. Parents' perceptions of their spouses' parenting and infant temperament as predictors of parenting and coparenting. JOURNAL OF FAMILY PSYCHOLOGY : JFP : JOURNAL OF THE DIVISION OF FAMILY PSYCHOLOGY OF THE AMERICAN PSYCHOLOGICAL ASSOCIATION (DIVISION 43) 2019; 33:542-553. [PMID: 30973253 DOI: 10.1037/fam0000530] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The present study examined how mothers' and fathers' perceptions of each others' parenting competence and infant temperament interact to predict each parent's individual behaviors during coparenting (involvement, support, and warmth) and their dyadic child-centered coparenting behavior. Data were obtained from a longitudinal study of 125 families in central Texas over their first 2 years of parenthood. Ratings of infants' temperament were obtained when infants were 6 weeks old. Each parents' perceptions of their spouse's parenting were coded from a couple interaction task when infants were 8 months old, and parents' coparenting behaviors were coded from triadic (mother-father-child) interactions obtained when children were 24 months old. Parents' perceptions of their spouse's parenting at 8 months interacted with their infants' temperament to predict their later warmth and dyadic child-centered coparenting. High maternal perceptions of fathers' parenting predicted high levels of father warmth and high levels of dyadic child-centered coparenting when infant temperamental reactivity was high. In contrast, high paternal perceptions of mothers' parenting marginally predicted high levels of mother warmth and high dyadic child-centered coparenting when infant temperamental reactivity was low. Parents' individual warmth and fathers' involvement and support were also associated with dyadic child-centered coparenting. This study should help researchers further understand how parents' attitudes toward each other's parenting interact with their infants' temperament qualities across the early years of parenthood to influence the quality of their dyadic coparenting. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
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Sasaki T, Sakamoto S, Akiyama D, Kirishima A, Kobayashi T, Sato N. Leaching behavior of gamma-emitting fission products, calcium, and uranium from simulated MCCI debris in water. J NUCL SCI TECHNOL 2019. [DOI: 10.1080/00223131.2019.1641444] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Harada K, Nakano S, Yuki S, Sawada K, Muranaka T, Kawamoto Y, Nakatsumi H, Yoshita H, Ando T, Kobayashi Y, Miyagishima T, Hatanaka K, Tanimoto A, Ishiguro A, Honda T, Dazai M, Sasaki T, Komatsu Y. A retrospective multicenter study evaluating the efficacy and safety of irinotecan in patients with advanced gastric cancer: analysis of Glasgow prognostic score (GPS). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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66
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Sasaki T, Ito D, Sonoda T, Morita Y, Wakabayashi Y, Yamamura T, Okamura H, Oishi S, Noguchi T, Fujii N, Uenoyama Y, Tsukamura H, Maeda KI, Matsuda F, Ohkura S. Peripheral administration of κ-opioid receptor antagonist stimulates gonadotropin-releasing hormone pulse generator activity in ovariectomized, estrogen-treated female goats. Domest Anim Endocrinol 2019; 68:83-91. [PMID: 30908995 DOI: 10.1016/j.domaniend.2018.12.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 11/19/2018] [Accepted: 12/29/2018] [Indexed: 11/26/2022]
Abstract
Pulsatile gonadotropin-releasing hormone (GnRH) secretion is indispensable for reproduction in mammals. Kisspeptin neurons in the hypothalamic arcuate nucleus (ARC), referred to as KNDy neurons because of the coexpression of neurokinin B and dynorphin A, are considered as components of the GnRH pulse generator that produces rhythmic GnRH secretion. The present study aimed to investigate if peripheral administration of PF-4455242, a κ-opioid receptor (KOR, a dynorphin A receptor) antagonist, facilitates pulsatile luteinizing hormone (LH) secretion and GnRH pulse generator activity in estrogen-treated ovariectomized Shiba goats to determine the possibility of using KOR antagonists to artificially control ovarian activities. PF-4455242 was intravenously infused for 4 h (1 or 10 μmol/kg body weight/4 h) or as a single subcutaneous injection (1 or 10 μmol/kg body weight). In a separate experiment, the same KOR antagonist (10 μmol/kg body weight/4 h) was intravenously infused during the recording of multiple unit activity (MUA) in the ARC that reflects the activity of the GnRH pulse generator to test the effects of KOR antagonist administration on GnRH pulse generator activity. Intravenous infusion and single subcutaneous injection of the KOR antagonist significantly increased the frequency of LH pulses compared with controls. Intravenous infusion of KOR antagonist also significantly increased the frequency of episodic bursts in the MUA. The present study demonstrates that peripherally administered KOR antagonist stimulates pulsatile LH secretion by acting on the GnRH pulse generator, and peripheral administration of PF-4455242 can be used to facilitate pulsatile LH secretion, which in turn facilitates ovarian activities in farm animals.
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Satoh M, Kondo M, Wada Y, Itano S, Kidokoro K, Nagasu H, Sasaki T, Kashihara N. SUN-158 EFFECT OF UREMIC TOXIN-INDOXYL SULFATE ON INTESTINAL DEFENSIN EXPRESSION IN RENAL FAILURE MICE. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Ueda A, Muranaka T, Kawamoto Y, Sawada K, Nakatsumi H, Harada K, Kobayashi Y, Miyagishima T, Hatanaka K, Dazai M, Kawahata S, Sasaki T, Sasaki Y, Kato S, Shinada K, Tsuji Y, Yuki S, Sakamoto N, Nishimoto N, Sakata Y, Komatsu Y. Multicenter phase 2 trial of weekly 5-FU plus l-LV regimen as salvage line chemotherapy for oral fluorouracil-resistant advanced gastric cancer (HGCSG1502). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ando T, Nakano S, Yuki S, Sawada K, Muranaka T, Kawamoto Y, Nakatsumi H, Yoshita H, Harada K, Kobayashi Y, Miyagishima T, Hatanaka K, Tanimoto A, Ishiguro A, Honda T, Sasaki T, Dazai M, Komatsu Y. The comparison between UGT1A1 single heterozygous and wild-type regarding the clinical outcomes of fixed-dose irinotecan monotherapy for advanced gastric cancer: a multicenter retrospective study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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OBA R, Kanzaki G, Sasaki T, Haruhara K, Okabayashi Y, Koike K, Tsuboi N, Yokoo T. SUN-230 ASSOCIATION BETWEEN ESTIMATED PROTEIN INTAKE AND SINGLE-NEPHRON GLOMERULAR FILTRATION RATE IN HEALTHY ADULTS. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Kobayashi T, Nakajima S, Motokawa R, Matsumura D, Saito T, Sasaki T. Structural Approach to Understanding the Solubility of Metal Hydroxides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7995-8006. [PMID: 31117736 DOI: 10.1021/acs.langmuir.9b01132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We report the hierarchical structure of zirconium hydroxide after aging at different temperatures to elucidate the factors governing zirconium solubility in aqueous solutions. Zirconium hydroxide solid phases after aging at 25, 40, 60, and 90 °C under acidic to alkaline conditions were investigated using extended X-ray absorption fine structure (EXAFS), wide- and small-angle X-ray scattering (WAXS and SAXS), and transmission electron microscopy (TEM) techniques to reveal the bulk and surface structures of the solid phases from the nanoscale to sub-microscale. After aging at 25 °C, the fundamental building unit of the solid phase was considered to be tetrameric and dimeric hydroxide species. These polynuclear species formed amorphous primary particles that are approximately 3 nm in size, which in turn formed aggregates that are hundreds of nanometers in size. This hierarchical structure was found to be stable up to 60 °C under acidic and neutral conditions and up to 40 °C under alkaline conditions. After aging at 90 °C under acidic conditions and at 60 and 90 °C under alkaline conditions, the WAXS and EXAFS measurements suggested the crystallization of the solid phase. The SAXS profiles and TEM observations supported the existence of crystallized large particles about 60 nm in size, and the appearance of the Guinier region in the SAXS profiles indicated that the crystallization of the amorphous primary particles leads to the reduction of the size of the large aggregates. The transformation of the solid-phase structure by temperature was discussed in relation to the solubility product to understand the solubility-limiting solid phase. The solubility of zirconium hydroxide after aging at different temperatures was governed not only by the size of the amorphous primary particles or crystallized large particles but also by their surface configuration.
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Hidaka T, Kakamu T, Endo S, Kasuga H, Masuishi Y, Kumagai T, Sato S, Sasaki T, Fukushima T. Factors associated with possession of accurate knowledge regarding occupational health management among operations leaders of radiation decontamination workers in Fukushima, Japan: a cross-sectional study. BMJ Open 2019; 9:e025729. [PMID: 31061030 PMCID: PMC6502049 DOI: 10.1136/bmjopen-2018-025729] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES An operations leader (OL) takes an important role in occupational health management for radiation decontamination workers in Japan, and candidates for the position must participate in a training session to acquire the necessary knowledge as required by law. However, it has not been clarified whether the candidates for the OL position actually possess accurate knowledge regarding occupational health management for such work after the training session. We, therefore, aimed at examining the current occupational health management knowledge among the candidates and investigating factors related to the knowledge, with hypothesis that possession of accurate knowledge is associated with prior experience of having worked in radiation decontamination. DESIGN A cross-sectional study. SETTING The training sessions held by Fukushima Prefecture Labor Standard Associations in Fukushima, Japan, in 2017. PARTICIPANTS Eighty male candidates participated in the training sessions. OUTCOME The number/proportion of correct answers to the questions regarding occupational health management, such as those on working environment management, control of operations and health management. RESULTS The proportion of those who possessed accurate knowledge regarding working environment management, control of operations and health management was 68.8%, 55.0% and 51.2%, respectively. Experience of radiation decontamination work was associated with the possession of inaccurate knowledge regarding working environment management (OR 0.140 (95% CI 0.042 to 0.464)), and the uncertainty of future radiation decontamination work schedules in difficult-to-return zones was associated with the possession of accurate knowledge regarding health management (OR 4.344 (95% CI 1.509 to 12.50)). CONCLUSIONS Previous experience in radiation decontamination work may hinder the ability to acquire accurate information regarding working environment management among candidates for an OL position. To promote adequate occupational health management for radiation decontamination workers, it is required to establish an effective instructional method for the OL candidate training sessions with consideration of previous relevant experience.
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Sasaki T, Konno M, Hasegawa Y, Imaji A, Terabaru M, Nakamura R, Ohira N, Matsukura K, Seiwa K. Role of mycorrhizal associations in tree spatial distribution patterns based on size class in an old-growth forest. Oecologia 2019; 189:971-980. [DOI: 10.1007/s00442-019-04376-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 03/04/2019] [Indexed: 11/29/2022]
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Ugawa Y, Sasaki T, Hamada M, Shirota Y. Differential effects on corticospinal excitability and adaptation task by paired associative stimulation (PAS) with distinct pulse width. Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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75
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Kitaguchi D, Nishizawa Y, Sasaki T, Tsukada Y, Ito M. Clinical benefit of high resolution anorectal manometry for the evaluation of anal function after intersphincteric resection. Colorectal Dis 2019; 21:335-341. [PMID: 30537066 DOI: 10.1111/codi.14528] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 11/12/2018] [Indexed: 02/08/2023]
Abstract
AIM Intersphincteric resection (ISR) is an advanced anus-preserving operation for treating low rectal cancer while avoiding colostomy. High-resolution anorectal manometry (HR-ARM) allows objective and accurate evaluation of anal function. However, correlations between anal function after ISR and HR-ARM parameters are unknown. The aim of the study was to evaluate HR-ARM for objective evaluation of anal function after ISR. METHOD A total of 81 patients who underwent ISR at our hospital between October 2014 and March 2016 were identified from our prospectively collected database and electronic medical records. Of these, 68 patients who had been evaluated using HR-ARM both before and after ISR were included in the study. Faecal incontinence (FI) was assessed by Wexner score. Multivariate analysis was performed to determine risk factors for severe FI after ISR. RESULTS Maximum resting pressure (MRP) (P < 0.001) and maximum squeeze pressure (P = 0.04) were significantly lower after ISR, and MRP (P < 0.001) and maximum squeeze pressure (P = 0.02) were significantly lower after total (or subtotal) ISR than after partial ISR. The overall incidence of severe FI after ISR was 18% (12/68), and a high pressure zone before ISR ≤ 3 cm (P = 0.007) and MRP before ISR > 60 mmHg (P = 0.02) were independently associated with an elevated incidence of severe FI after ISR. Decreased preoperative MRP also correlated with severe FI after ISR (P = 0.008). CONCLUSION HR-ARM is reliable for the evaluation of anal function after ISR, and the high pressure zone and MRP may be useful preoperative predictors of severe FI after ISR.
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