Hroaki IIJIMA

Dr. Hroaki IIJIMA

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Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 October 2017 in Allergology International
Verified
Journal Article
Open access
JKJun Kanazawa
Jun Kanazawa
HMHironori Masuko
Hironori Masuko
YYYohei Yatagai
Yohei Yatagai
TSTohru Sakamoto
Tohru Sakamoto
HYHideyasu Yamada
Hideyasu Yamada
NHNobuyuki Hizawa
Nobuyuki Hizawa
Recent studies have demonstrated that a coding SNP (rs6967330, Cys529→Tyr) in cadherin-related family member 3 (CDHR3), which was previously associated with wheezing illness and hospitalizations in infancy, could support efficient human rhinovirus C (RV-C) entry and replication. Here, we sought to examine the genetic contribution of this variant to the development of adult asthma. We performed a candidate gene case-control association study of 2 independent Japanese populations (a total of 3366 adults). The odds ratios (ORs) for association of the A allele at rs6967330 with adult asthma were calculated according to age at onset of asthma. In addition, the effect of the CDHR3 genotype on the development of specific asthma phenotypes was examined. The A allele was associated with asthma (OR = 1.56; Mantel-Haenszel p = 0.0040) when the analysis was limited to patients with early-onset adult asthma. In addition, when the analysis was limited to atopic individuals, a stronger association of the CDHR3 variant with early-onset asthma was found, and interaction of the CDHR3 genotype with atopy was demonstrated. Finally, a significant association of this variant was specifically found with a phenotype of asthma characterized by atopy, early-onset, and lower lung function. Our study supports the concept that the CDHR3 variant is an important susceptibility factor for severe adult asthma in individuals who develop the disease in early life. The interaction between the CDHR3 variant and atopy indicates that genetic predisposition to early respiratory viral infection is combined with atopy in promoting asthma.

28 March 2023 in Cancers
Verified
Journal Article
Open access
PDF file
ASAkihiro Sakai
Akihiro Sakai
HIHroaki IIJIMA
Hroaki IIJIMA
KEKoji Ebisumoto
Koji Ebisumoto
MYMayu Yamauchi
Mayu Yamauchi
TTTakanobu Teramura
Takanobu Teramura
KOKenji Okami
Kenji Okami
This study aimed to determine the prognostic value of inflammatory and nutritional biomarkers of immune checkpoint inhibitor (ICI) therapy for recurrent or metastatic squamous cell carcinoma of the head and neck (RMHNSCC) and to identify the most useful factor for prognosis assessment. We retrospectively reviewed the medical records of patients with RMHNSCC who received ICI therapy. The response rate for ICI therapy and the relationship between inflammatory and nutritional biomarkers and overall survival were examined. The included biomarkers did not correlate with an objective response rate but were associated with a disease control rate. Univariate analysis showed significant correlations between the serum albumin level, C-reactive protein level, platelet to lymphocyte ratio, neutrophil to lymphocyte ratio, lymphocyte to monocyte ratio (LMR), systemic immune-inflammation index, and controlling the nutritional status score and overall survival; multivariate analysis showed that LMR was significantly correlated with overall survival. LMR was the most important biomarker according to the machine learning model. This study suggests that LMR may be the most useful biomarker for predicting the prognosis of ICI treatment for RMHNSCC.

29 August 2023 in Discover Oncology
Verified
Journal Article
Open access
PDF file
ASAkihiro Sakai
Akihiro Sakai
KEKoji Ebisumoto
Koji Ebisumoto
HIHroaki IIJIMA
Hroaki IIJIMA
MYMayu Yamauchi
Mayu Yamauchi
TTTakanobu Teramura
Takanobu Teramura
KOKenji Okami
Kenji Okami
Objective: This study aimed to evaluate the clinical effectiveness of chemotherapy following immune checkpoint inhibitors (ICI). The association between inflammatory and nutritional factors and prognosis has also been investigated. Methods: We retrospectively reviewed the medical records of recurrent or metastatic head and neck squamous cell carcinoma (RMHNSCC) patients who received chemotherapy following ICI therapy. The response rate and survival after chemotherapy, and nutritional and inflammatory factors, were examined. Results: The ICI before chemotherapy was nivolumab in 36 patients (70.6%) and pembrolizumab in 15 patients (29.4%). The chemotherapy regimens consisted of PTX in 32 patients (62.7%), PTX + Cmab in 9 (17.6%), and S1 in 10 (19.6%). The median overall survival (OS) was 20 months (95% CI 12–25), the estimated 12-month OS rate was 63.3%, the median progression-free survival (PFS) was 5 months (CI 4–6), and the 12-month PFS estimate was 8.9%. Univariate analysis significantly correlated Neutrophil-to-Lymphocyte Ratio (NLR), platelet-to-lymphocyte ratio (PLR), controlling nutritional status score (CONUT), and prognostic nutrition index (PNI) with OS and PFS. Additionally, these factors were significantly correlated with OS and PFS in the log-rank tests. Conclusions: Chemotherapy following ICI is highly effective. There were no significant differences in the chemotherapy regimens. Inflammatory and nutritional factors may associate with patient prognosis after chemotherapy.

18 September 2021 in Laryngoscope Investigative Otolaryngology
Verified
Journal Article
Open access
PDF file
KEKoji Ebisumoto
Koji Ebisumoto
ASAkihiro Sakai
Akihiro Sakai
DMDaisuke Maki
Daisuke Maki
KRKevin Robinson
Kevin Robinson
TMTomoaki Murakami
Tomoaki Murakami
KOKenji Okami
Kenji Okami
Objectives With the advent of new optical technologies, early pharyngolaryngeal cancerous lesions can be better visualized. Although the conventional transnasal approach offers great views of the hypopharynx and larynx, the visualization of the oropharynx and palatine tonsils is limited. Through the transoral insertion of a flexible video-laryngoscope, direct views of the oropharynx and oral cavity can be obtained. Thus, transoral examination may contribute to primary detection of cancers of unknown primary (CUP). Methods Eighty-five CUP patients from Tokai University were included retrospectively in this study, from 2006 to 2017. Starting in 2010, we employed the transoral examination in addition to our conventional method. The primary detection rates were compared before and after 2010. Oropharyngeal primaries were further analyzed for tumor subsite and p16 status. Results The overall primary detection rate did not improve with the addition of transoral examination. However, greater numbers of oropharyngeal primaries were detected. The oropharyngeal lesions detected by transoral examination were mainly p16 positive, located on the palatine tonsil. Conclusion Transoral examination is a noninvasive, easy method to adopt in an outpatient setting, and a promising technique to improve tumor detection in this era of human papillomavirus-associated head and neck cancers. Level of Evidence 3.

23 June 2021 in Clinical Case Reports
Verified
Journal Article
Open access
PDF file
KSKosuke Saito
Kosuke Saito
MSMotoki Sekine
Motoki Sekine
FGFumiyuki Goto
Fumiyuki Goto
HYHikaru Yamamoto
Hikaru Yamamoto
SKShoji Kaneda
Shoji Kaneda
KOKenji Okami
Kenji Okami
Gardner syndrome with odontogenic sinusitis is rare but should be suspected in patients with multiple osteomas of the skull and facial bones, excess teeth, impacted teeth, and odontomas. Early diagnosis and treatment of GS may improve prognosis.

12 September 2023 in Journal of Medical Case Reports
Verified
Journal Article
Open access
PDF file
HIHroaki IIJIMA
Hroaki IIJIMA
ASAkihiro Sakai
Akihiro Sakai
KEKoji Ebisumoto
Koji Ebisumoto
MYMayu Yamauchi
Mayu Yamauchi
TTTakanobu Teramura
Takanobu Teramura
KOKenji Okami
Kenji Okami
Background: Immune checkpoint inhibitors might cause immune-related adverse events that are still largely unknown. Case presentation: An 80-year-old Asian female was diagnosed with cervical lymph node metastasis from lip cancer (cT1N0M0) and underwent right cervical neck dissection. Subsequently, she developed right cervical lymph node relapse and lung metastasis. The patient was deemed eligible for pembrolizumab owing to unresectable neck recurrence and pulmonary metastasis. The Combined Positive Score of the submandibular lymph nodes was 100. Pembrolizumab monotherapy was initiated, and complete remission was achieved. She developed diabetic ketoacidosis in the eighth month and was diagnosed with fulminant type 1 diabetes mellitus. Insulin induction was performed. The patient developed adrenal insufficiency after 10 months. These were immune-related adverse events, caused by pembrolizumab. The patient has remained in complete remission, and pembrolizumab therapy was continued. Conclusions: The study presents the first reported case of type 1 diabetes in a patient with head and neck squamous cell carcinoma treated with pembrolizumab monotherapy, in Japan. Efficient interdepartmental collaboration will promote the management of severe immune-related adverse events and improve the quality of life of patients.