Hirtie Bogdan

Dr. Hirtie Bogdan


Research Focus & Metrics

Academic Career Length

2Years (2025-Present)

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

Representative Publications

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Verified
Journal Article
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ECElena Ciurariu
Elena Ciurariu
Tirziu Andreea TalidaTirziu Andreea Talida
Tirziu Andreea Talida
Norberth Istvan VargaNorberth Istvan Varga
Norberth Istvan Varga
HBHirtie Bogdan
Hirtie Bogdan
AAAlexandru Alexandru
Alexandru Alexandru
LNLaura Corina Nicolescu Laura Corina Nicolescu
Laura Corina Nicolescu Laura Corina Nicolescu
The interplay between gut microbiota and retinal health, known as the gut-–retina axis, has gained increasing attention in recent years. Short-chain fatty acids (SCFAs), metabolites produced by gut microbiota, have been identified as key mediators of gut–retina communication. This systematic review explores the role of SCFAs in retinal health and their potential impact on the development and progression of retinal diseases, such as diabetic retinopathy (DR), age-related macular degeneration (AMD), and glaucoma. A literature search was conducted across multiple databases, including PubMed, Google Scholar, and Science Direct, to identify studies published between 2014 and December 2024. Studies were included if they investigated the effects of SCFAs on retinal structure, function, or disease pathogenesis in animal models or human subjects. The review included 10 original articles spanning both preclinical and clinical studies. Evidence suggests that SCFAs play a crucial role in maintaining retinal homeostasis through anti-inflammatory and neuroprotective mechanisms. Dysbiosis of the gut microbiota, leading to altered SCFA production, was associated with increased retinal inflammation, oxidative stress, and vascular dysfunction. Furthermore, reduced SCFA levels were linked to the progression of retinal diseases, such as diabetic retinopathy and age-related macular degeneration. Modulation of gut microbiota and SCFA levels through dietary interventions or probiotics may represent a novel therapeutic strategy for preventing or managing retinal diseases. Further research is needed to elucidate the precise molecular mechanisms underlying SCFA-mediated retinal protection and to evaluate the efficacy of targeted therapies in clinical settings.

21 March 2025 in Nutrients
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Journal Article
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CMCristian Ion Mot
Cristian Ion Mot
DHDelia Ioana Horhat
Delia Ioana Horhat
Nicolae Constantin BalicaNicolae Constantin Balica
Nicolae Constantin Balica
HBHirtie Bogdan
Hirtie Bogdan
Norberth Istvan VargaNorberth Istvan Varga
Norberth Istvan Varga
RGRadu Galis
Radu Galis
Background/Objectives: Vitamin D is classically associated with calcium and phosphate homeostasis, but recent research has expanded its role to include several new roles such as immune regulation, inflammation, and potential anti-cancer properties. The vitamin D receptor (VDR) is expressed in over 400 tissues, including those of the head and neck, implying a potential link between vitamin D and head and neck cancers (HNCs). Given the need for newer and better therapeutic approaches, this systematic review aims to synthesize existing clinical evidence on the relationship between vitamin D status and clinical outcomes in HNC patients. Methods and Results: A comprehensive literature search, across multiple databases including PubMed, Google Scholar and Science Direct, identified 187,642 studies related to vitamin D and cancer, from which 16 studies met the inclusion criteria. The inclusion criteria were English-language, full-text original research (2015–2025) on vitamin D’s role in HNC progression and treatment, focusing on human studies. The findings indicate that vitamin D deficiency is highly prevalent among HNC patients, with rates ranging from 47% to 95%, particularly in advanced-stage cancers and those undergoing intensive treatment. Inverse association between vitamin D levels and HNC risk was reported, with higher serum 25(OH)D levels linked to a 30–32% reduction in cancer risk. Additionally, higher vitamin D levels correlated with improved survival rates and reduced recurrence, though some findings lacked statistical significance. Deficiencies were associated with higher rates of malnutrition and postoperative complications, reinforcing vitamin D’s role in nutritional stability and surgical recovery. Conclusions: This systematic review highlights how common and significant vitamin D deficiency is among head and neck cancer (HNC) patients, exploring its possible role in cancer risk, prognosis, survival, treatment-related side effects, malnutrition, and post-surgical complications. The evidence suggests that while higher vitamin D levels are linked to better survival and fewer treatment-related issues, the benefits seem to level off beyond a certain point, indicating a more complex relationship. Additionally, vitamin D supplementation appears to help reduce chemoradiation side effects like mucositis, skin toxicity, dysphagia, and pain, ultimately improving patients’ quality of life during treatment.

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RZRăzvan Ionuț Zimbru
Răzvan Ionuț Zimbru
EZElena-Larisa Zimbru
Elena-Larisa Zimbru
FBFlorina Bojin
Florina Bojin
LHLaura Haidar
Laura Haidar
Minodora AndorMinodora Andor
Minodora Andor
Carmen PanaitescuCarmen Panaitescu
Carmen Panaitescu
Asthma and atherosclerosis are chronic conditions with distinct pathophysiologies, but overlapping inflammatory mechanisms that suggest a potential common regulatory framework. MicroRNAs (miRNAs), small non-coding RNA molecules that modulate gene expression post-transcriptionally, could be key players in linking these disorders. This review outlines how miRNAs contribute to the complex interplay between asthma and atherosclerosis, focusing on key miRNAs involved in inflammatory pathways, immune cell regulation and vascular remodeling. We discuss specific miRNAs, such as miR-155, miR-21 and miR-146a, which have been shown to modulate inflammatory cytokine production and T cell differentiation, impacting respiratory and cardiovascular health. The common miRNAs found in both asthma and atherosclerosis emphasize their role as potential biomarkers, but also as therapeutic targets. Understanding these molecular connections may unlock novel approaches for innovative, integrated treatment strategies that address both conditions and may significantly improve patient outcomes. Further research is needed to explore mechanistic pathways and validate the translational potential of miRNA-based interventions in preclinical and clinical settings.

3 January 2025 in Medicina
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Journal Article
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HBHirtie Bogdan
Hirtie Bogdan
Norberth Istvan VargaNorberth Istvan Varga
Norberth Istvan Varga
LOLicinia Andrada Oprisoni
Licinia Andrada Oprisoni
STSonia Tanasescu
Sonia Tanasescu
EBEstera Boeriu
Estera Boeriu
DHDelia Ioana Horhat
Delia Ioana Horhat
Background and Objectives: Effective communication in oncology is crucial, but challenging due to the complex information and emotional burden associated with a cancer diagnosis. This cross-sectional study investigated the communication preferences of 155 Romanian adults diagnosed with ENT cancers and explored the relationship between these preferences, their levels of psychological distress, and sociodemographic factors. Materials and Methods: Participants completed the KOPRA questionnaire, assessing communication preferences, and the Hospital Anxiety and Depression Scale (HADS) to measure psychological distress. Results: The results revealed that patients strongly prioritized active involvement in their care (Patient Participation and Patient Orientation—PPO) and open communication with healthcare providers (Effective and Open Communication—EOC). While emotional support was valued, it was considered less critical than PPO and EOC. Notably, communication about personal matters was deemed the least important aspect of communication. A high prevalence of psychological distress was observed, particularly among widowed individuals and females. No direct correlation was found between communication preferences and distress. Conclusions: These findings underscore the importance of shared decision-making, clear information exchange, and a patient-centered approach in the context of ENT cancer care, while also highlighting the need for routine screening and appropriate support for psychological well-being in this patient population.

25 September 2025 in Medicina
Verified
Journal Article
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BABanta Mihaela Andreea
Banta Mihaela Andreea
Nicolae Constantin BalicaNicolae Constantin Balica
Nicolae Constantin Balica
SPSimona Pârvu
Simona Pârvu
KMKarina Marin
Karina Marin
KGKristine Guran
Kristine Guran
DHDelia Ioana Horhat
Delia Ioana Horhat
Background and Objectives: Laryngeal cancer imposes a disproportionate burden on speech, airway protection and long-term quality of life. Contemporary population-based data for Central and Eastern Europe remain scarce, and the post-pandemic trajectory is uncertain. Materials and Methods: We performed a nationwide, retrospective ecological time-series study using Romanian mortality registers and hospital-discharge files for 2017–2023. Crude and age-standardised mortality rates (ASMRs) were calculated, county-level indirect standardisation and spatial autocorrelation assessed and joinpoint regression quantified temporal trends. Forecasts to 2040 combined Holt–Winters/ARIMA models with Elliott-wave heuristics anchored to Fibonacci retracements. Results: In 2023, 798 laryngeal cancer deaths yielded a crude mortality of 3.65/100,000 (95% CI 3.41–3.91). Male mortality (7.07/100,000) exceeded female mortality 18-fold. Rural residents experienced a higher rate than urban counterparts (4.26 vs. 3.04/100,000), a difference unchanged after indirect age standardisation. National ASMR fell by 3.7% annually (p < 0.01), yet five counties formed a high-risk corridor (standardised mortality ratios 1.59–1.82); Moran’s I = 0.27 (p < 0.01) indicated significant spatial clustering. Pandemic-era surgical throughput collapsed by 48%, generating a backlog projected to persist beyond 2030. Ensemble forecasting anticipates a doubling of discharges and mortality between 2034 and 2037 unless smoking prevalence falls by ≥30% and radon exposure is curtailed. Conclusions: Although overall laryngeal cancer mortality in Romania is declining, the pace lags behind Western Europe and is threatened by geographic inequities and pandemic-related care delays. Aggressive tobacco control, radon-remediation policies and expansion of surgical and radiotherapeutic capacity are required to avert a forecasted surge in the next decade.

12 September 2025 in Clinics and Practice
Verified
Journal Article
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HBHirtie Bogdan
Hirtie Bogdan
ASAna-Maria Stanoiu
Ana-Maria Stanoiu
KGKristine Guran
Kristine Guran
Norberth Istvan VargaNorberth Istvan Varga
Norberth Istvan Varga
CVCLAUDIA RALUCA BALASA VIRZOB
CLAUDIA RALUCA BALASA VIRZOB
CMCristian Ion Mot
Cristian Ion Mot
Background and Objectives: Vitamin D deficiency and psychological distress have been linked to cancer biology, but their relevance to tumor differentiation in head-and-neck squamous cell carcinoma (HNSCC) is uncertain. Materials and Methods: In this cross-sectional study at the Department of Otolaryngology, County Hospital of Timișoara, Romania, we enrolled newly diagnosed HNC patients from October 2023 to December 2024, analyzing 199 SCC patients after exclusions. Vitamin D status was assessed using serum 25-OH-vitamin D levels, and distress was measured with the validated Romanian version of the Hospital Anxiety and Depression Scale (HADS). Tumor aggressiveness was defined by histological grade (G3 vs. G1–G2). Univariate, multivariate, and subgroup analyses were conducted, adjusting for confounders like smoking. Results: Vitamin D deficiency (<20 ng/mL) was prevalent (80.40%), with median 25-OH-vitamin D levels of 15.1 ng/mL. Univariate analysis revealed a modest association between vitamin D deficiency and poorly differentiated tumors (G3 vs. G1–G2; OR = 1.79, p = 0.055) and between clinically significant anxiety (HADS-A ≥ 8) and G3 tumors (OR = 1.71, p = 0.059). A weak negative correlation was observed between 25-OH-vitamin D levels and HADS-A scores (rho = −0.17, p = 0.052). In multivariate analysis adjusted for age, smoking, and tumor location, these associations weakened (vitamin D deficiency: OR = 1.55, p = 0.082; HADS-A ≥8: OR = 1.56, p = 0.113). Subgroup analysis suggested a trend toward higher odds of G3 tumors in patients with both vitamin D deficiency and high anxiety (OR = 1.72, p = 0.075). Conclusions: Univariate analyses indicated potential links between vitamin D deficiency, psychological distress, and tumor aggressiveness in HNSCC, but these did not reach statistical significance after adjustment for confounders. The observed trends, particularly in subgroups with combined deficiency and distress, suggest a possible interplay worth exploring further. To conclude, neither vitamin-D deficiency nor clinically significant distress independently predicted poor histological differentiation after adjustment; observed trends, including a possible distress–vitamin-D interaction, are hypothesis-generating and warrant testing in larger, longitudinal cohorts.