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Ign Riwanto

Unknown Affiliation

Author-ID : 2665368

Biochemistry, Genetics & Molecular Biology Dentistry Health Professions Immunology & microbiology Medicine & Pharmacology Neuroscience Nursing Public Health

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1

Pengaruh Pemberian Vitamin C Terhadap Aktiitas Fagositosis Makrofag dan Kadar Vitamin C dalam Cairan Intraperitoneal Mencit Balb/C dengan Sepsis Hendra Widjaja; Ign Riwanto; Edi Dharmana
Medica Hospitalia : Journal of Clinical Medicine Vol. 1 No. 2 (2012): Med Hosp
Publisher : RSUP Dr. Kariadi

Latar belakang : Sepsis masih menjadi permasalahan dalam praktek klinis karena angka mortalitas masih tinggi. Penelitian bertujuan mengetahui pengaruh dosis bertingkat vitamin C yang dibutuhkan untuk mencapai aktivitas fagositosis optimal makrofag mencit sepsis. Metode : Penelitian ini merupakan uji laboratoris mencit Balb/C dengan pendekatan the post test only controlled group design, 20 ekor mencit sepsis dibagi 4 kelompok: kelompok kontrol (K); kelompok perlakuan mendapat vitamin C 0,52 mg/hari (P1); vitamin C 1,04 mg/hari (P2); vitamin C 2,6 mg /hari (P3) selama 3 hari, kemudian diperiksa kemampuan fagositosis makrofag dan kadar vitamin C intraperitoneal. Tingkat aktivitas fagositosis makrofag dan kadar vitamin C intraperitoneal dianalisis dengan ANOVA dilanjutkan dengan Bonferroni test, dan korelasi keduanya diuji dengan uji korelasi Spearman. Hasil : Terdapat perbedaan bermakna pada kemampuan fagositosis makrofag dalam kelompok (p<0,05). Uji antar kelompok menunjukkan: K–P1 (p<0,001), K–P2 (p<0,001), K–P3 (p<0,001), P1–P2 (p<0,001), P1–P3 (p<0,001), tetapi tidak didapatkan perbedaan yang bermakna antara P2-P3 (p=0,48). Terdapat perbedaan bermakna kadar vitamin C intraperitoneal K–P2 (p<0,001), K–P3 (p<0,001), P1–P2 (p=0,003), P1–P3 (p<0,001), P2-P3 (p<0,001), kecuali pada kelompok K–P1 (p=0,131). Didapatkan korelasi positif antara kadar vitamin C intraperitoneal dengan fagositosis makrofag (r=0,58 ; p<0,001). Simpulan : Terdapat peningkatan signifikan pada fagositosis makrofag dan kadar vitamin C intraperitoneal pada mencit Balb/C dengan sepsis yang diberi vitamin C. Dosis ideal vitamin C adalah 1,04 mg/hari, dan kadarnya meningkat sesuai dosis yang diberikan. Kata kunci: Sepsis, vitamin C, fagositosis makrofag, vitamin C intraperitoneal.

Prognostic Significance of the Epithelial–Mesenchymal Transition Phenotype in Basal Cell Carcinoma: A Meta-Analysis of E-Cadherin Loss and Stromal Alpha-SMA Upregulation as Recurrence Predictors Meira Astuti; Endang Mahati; Udadi Sadhana; Selamat Budijitno; Ign Riwanto
Bioscientia Medicina : Journal of Biomedicine and Translational Research Vol. 10 No. 3 (2025): Bioscientia Medicina: Journal of Biomedicine & Translational Research
Publisher : HM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37275/bsm.v10i3.1537

Background: Basal cell carcinoma represents the most prevalent cutaneous malignancy worldwide. While metastasis is rare, local recurrence poses a substantial therapeutic challenge, particularly in the anatomically critical H-zone of the face. Conventional risk stratification relies on tumor size and histological subtype, but these markers frequently fail to capture the intrinsic biological aggressiveness of the tumor. The epithelial–mesenchymal transition phenotype, characterized by the loss of epithelial adhesion molecule E-cadherin and the activation of the tumor stroma via alpha-smooth muscle actin expression, has emerged as a potential driver of local invasion. Methods: We conducted a systematic review and meta-analysis adhering to PRISMA 2020 guidelines to evaluate the prognostic value of these biomarkers. A comprehensive search identified ten pivotal studies comprising 648 cases. The primary endpoint was adverse outcome, defined as clinical recurrence or the presence of high-risk infiltrative histology. Data were synthesized using a random-effects model to calculate pooled Odds Ratios and Standardized Mean Differences, with rigorous sensitivity analyses to account for heterogeneity. Results: The meta-analysis revealed a profound association between stromal activation and adverse outcomes. Alpha-SMA upregulation was the most robust predictor, with a pooled Odds Ratio of 6.82 (95% CI: 3.14–14.81; p < 0.0001). Loss of membranous E-cadherin also significantly predicted recurrence (Odds Ratio = 4.15; 95% CI: 1.89–9.10; p = 0.0004), although with higher heterogeneity, reflecting the focal nature of partial epithelial–mesenchymal transition at the invasive front. The combined phenotype of high alpha-SMA and low E-Cadherin represented the highest risk profile. Conclusion: The epithelial–mesenchymal transition phenotype serves as a high-fidelity predictor of basal cell carcinoma recurrence. Stromal alpha-SMA marks a permissive soil for invasion and should be considered for integration into pathological reporting for ambiguous or high-risk tumors to guide surgical margin management.

Prognostic Significance of the Epithelial–Mesenchymal Transition Phenotype in Basal Cell Carcinoma: A Meta-Analysis of E-Cadherin Loss and Stromal Alpha-SMA Upregulation as Recurrence Predictors Meira Astuti; Endang Mahati; Udadi Sadhana; Selamat Budijitno; Ign Riwanto
Bioscientia Medicina : Journal of Biomedicine and Translational Research Vol. 10 No. 3 (2025): Bioscientia Medicina: Journal of Biomedicine & Translational Research
Publisher : HM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37275/bsm.v10i3.1537

Background: Basal cell carcinoma represents the most prevalent cutaneous malignancy worldwide. While metastasis is rare, local recurrence poses a substantial therapeutic challenge, particularly in the anatomically critical H-zone of the face. Conventional risk stratification relies on tumor size and histological subtype, but these markers frequently fail to capture the intrinsic biological aggressiveness of the tumor. The epithelial–mesenchymal transition phenotype, characterized by the loss of epithelial adhesion molecule E-cadherin and the activation of the tumor stroma via alpha-smooth muscle actin expression, has emerged as a potential driver of local invasion. Methods: We conducted a systematic review and meta-analysis adhering to PRISMA 2020 guidelines to evaluate the prognostic value of these biomarkers. A comprehensive search identified ten pivotal studies comprising 648 cases. The primary endpoint was adverse outcome, defined as clinical recurrence or the presence of high-risk infiltrative histology. Data were synthesized using a random-effects model to calculate pooled Odds Ratios and Standardized Mean Differences, with rigorous sensitivity analyses to account for heterogeneity. Results: The meta-analysis revealed a profound association between stromal activation and adverse outcomes. Alpha-SMA upregulation was the most robust predictor, with a pooled Odds Ratio of 6.82 (95% CI: 3.14–14.81; p < 0.0001). Loss of membranous E-cadherin also significantly predicted recurrence (Odds Ratio = 4.15; 95% CI: 1.89–9.10; p = 0.0004), although with higher heterogeneity, reflecting the focal nature of partial epithelial–mesenchymal transition at the invasive front. The combined phenotype of high alpha-SMA and low E-Cadherin represented the highest risk profile. Conclusion: The epithelial–mesenchymal transition phenotype serves as a high-fidelity predictor of basal cell carcinoma recurrence. Stromal alpha-SMA marks a permissive soil for invasion and should be considered for integration into pathological reporting for ambiguous or high-risk tumors to guide surgical margin management.

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